/* ================================================================
   Probe Software Assistant — Application Theme
   ================================================================
   Fonts:   Inter (interface and answer typography)
             IBM Plex Mono (code and compact metadata only)
   Palette: Deep blue-black bg, teal/cyan accent, warm amber secondary
   ================================================================ */

/* ── Design Tokens ──────────────────────────────────────── */
:root {
  --bg:         #0a0e14;
  --surface:    #131a24;
  --surface2:   #1c2533;
  --surface3:   #243040;
  --border:     #243040;
  --border-hl:  #3a4d60;
  --text:       #e6edf3;
  --text-dim:   #7e8fa6;
  --accent:     #4ecdc4;
  --accent2:    #34d399;
  --accent3:    #e8a838;
  --danger:     #f87171;
  --danger-bg:  #2d1518;
  --font:       'Inter', 'Segoe UI', system-ui, sans-serif;
  --mono:       'IBM Plex Mono', 'Cascadia Code', 'Fira Code', monospace;
  --radius:     10px;
  --radius-sm:  5px;
  --shadow-sm:  0 2px 12px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 24px rgba(78, 205, 196, 0.06);
  --transition: 0.2s ease;
}

/* ── Light Theme Override ──────────────────────────────── */
[data-theme="light"] {
  --bg:         #f5f7fa;
  --surface:    #ffffff;
  --surface2:   #eef1f6;
  --surface3:   #dde3ec;
  --border:     #c8d0dc;
  --border-hl:  #a0aec0;
  --text:       #1a202c;
  --text-dim:   #5a6577;
  --accent:     #0d9488;
  --accent2:    #059669;
  --accent3:    #d97706;
  --danger:     #dc2626;
  --danger-bg:  #fef2f2;
  --shadow-sm:  0 2px 12px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 24px rgba(13, 148, 136, 0.04);
}

/* ── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* Subtle radial glow at top for depth */
  background-image: radial-gradient(ellipse at 50% 0%, rgba(78, 205, 196, 0.03) 0%, transparent 60%);
  background-attachment: fixed;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #6ee7de; text-decoration: underline; }

/* Light theme: softer link hover, neutral body glow */
[data-theme="light"] a:hover { color: #0a7e76; }
[data-theme="light"] body {
  background-image: radial-gradient(ellipse at 50% 0%, rgba(13, 148, 136, 0.04) 0%, transparent 60%);
}

/* ── Header ─────────────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  min-height: 56px;
  display: flex;
  align-items: center;
}
[data-theme="light"] header { background: rgba(245, 247, 250, 0.85); }

/* Theme toggle button */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 1.1rem;
  padding: 0.2rem 0.45rem;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
  flex-shrink: 0;
  margin-left: auto;
}
.theme-toggle-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface2);
}

.header-appearance-controls {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex: 0 0 auto;
}

.header-appearance-controls .theme-toggle-btn {
  margin-left: 0;
}

.season-banner-disclosure {
  width: 30px;
  height: 30px;
  min-width: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--text-dim);
  font: inherit;
  font-size: 0.92rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.16s ease, background 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.season-banner-disclosure[hidden] {
  display: none !important;
}

.season-banner-disclosure:hover {
  border-color: var(--season-accent);
  background: var(--season-soft);
  color: var(--season-accent-strong);
}

.season-banner-disclosure:focus-visible {
  outline: 2px solid var(--season-accent-strong);
  outline-offset: 2px;
}

.season-banner-disclosure span {
  display: inline-block;
  transition: transform 0.2s ease;
}

.season-banner-disclosure[aria-expanded="true"] span {
  transform: rotate(-90deg);
}

.season-banner-disclosure[aria-expanded="false"] span {
  transform: rotate(90deg);
}

/* Rate limit indicator pill in header */
.rate-indicator {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.15rem 0.5rem;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 0;
  white-space: nowrap;
}
.rate-indicator.rate-low {
  color: var(--accent3);
  border-color: var(--accent3);
}
.rate-indicator.rate-exhausted {
  color: var(--danger);
  border-color: var(--danger);
}

.header-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.logo:hover { color: var(--accent); text-decoration: none; }

.logo-icon {
  color: var(--accent);
  font-size: 1.1rem;
  filter: drop-shadow(0 0 4px rgba(78, 205, 196, 0.4));
}

.header-model {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--surface);
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: auto;
  flex-wrap: wrap;
}

/* Hamburger menu button — hidden on desktop */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.4rem;
  cursor: pointer;
  margin-left: auto;
}
.hamburger-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-dim);
  border-radius: 1px;
  transition: all 0.2s ease;
}
.hamburger-open .hamburger-bar:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.hamburger-open .hamburger-bar:nth-child(2) { opacity: 0; }
.hamburger-open .hamburger-bar:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

.nav-link {
  font-size: 0.82rem;
  color: var(--text-dim);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--text);
  background: var(--surface);
  text-decoration: none;
}
.nav-link.active {
  color: var(--accent);
  background: rgba(78, 205, 196, 0.08);
}

.nav-user {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--mono);
  margin-left: 0.75rem;
  letter-spacing: 0.01em;
}

/* ── Main / Footer ──────────────────────────────────────── */
main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

/* When sidebar is present, main becomes full-width flex container */
main.has-sidebar {
  max-width: 100%;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: stretch;
}
main.has-sidebar .main-content-area {
  flex: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  min-width: 0;
}

footer {
  text-align: center;
  padding: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

.footer-text { opacity: 0.7; }

/* ── Card (frosted glass) ───────────────────────────────── */
.card {
  background: rgba(19, 26, 36, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(36, 48, 64, 0.6);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-glow);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: var(--border-hl);
}

/* ── Form Elements ──────────────────────────────────────── */
textarea, select, input[type="text"], input[type="email"],
input[type="password"], input[type="number"], input[type="search"] {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
  font-family: var(--font);
  font-size: 0.9rem;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

textarea:focus, select:focus, input[type="text"]:focus,
input[type="email"]:focus, input[type="password"]:focus,
input[type="number"]:focus, input[type="search"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.12);
}

textarea::placeholder, input::placeholder {
  color: var(--text-dim);
  opacity: 0.65;
}

select {
  cursor: pointer;
  appearance: auto;
}

label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-dim);
  display: block;
  margin-bottom: 0.3rem;
}

/* ── Query form (ask page) ──────────────────────────────── */
.query-form { display: flex; flex-direction: column; gap: 0.75rem; }
.form-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.form-row > div { flex: 1; min-width: 160px; }

.controls-row {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  cursor: pointer;
  white-space: nowrap;
}

.checkbox-label input[type="checkbox"] {
  width: auto;
  accent-color: var(--accent);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, #3db8b0, #4ecdc4, #46b8aa);
  color: #0a0e14;
  box-shadow: 0 2px 8px rgba(78, 205, 196, 0.2);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #4ecdc4, #5fe0d7, #4ecdc4);
  box-shadow: 0 4px 16px rgba(78, 205, 196, 0.3);
  transform: translateY(-1px);
  color: #0a0e14;
  text-decoration: none;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(78, 205, 196, 0.2);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(78, 205, 196, 0.06);
  text-decoration: none;
}

/* ── View Mode Tabs ─────────────────────────────────────── */
.view-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 1.25rem;
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 3px;
  border: 1px solid var(--border);
}

.view-tab {
  flex: 1;
  text-align: center;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  border: none;
  background: transparent;
  font-family: var(--font);
}

.view-tab:hover { color: var(--text); background: var(--surface2); }

.view-tab.active {
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
}

/* ── Answer Area ────────────────────────────────────────── */
#answer-area:empty::after {
  content: 'Your answer will appear here\2026';
  display: block;
  text-align: center;
  padding: 2rem;
  color: var(--text-dim);
  font-style: italic;
  opacity: 0.5;
}

.answer-block {
  padding: 1rem 0;
}

.answer-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Answer text typography ─────────────────────────────── */
.answer-text {
  line-height: 1.72;
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: 0.01em;
}

.answer-text p { margin-bottom: 0.6rem; }
.answer-text p:last-child { margin-bottom: 0; }

.answer-text code {
  background: var(--surface2);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--accent);
  border: 1px solid rgba(36, 48, 64, 0.5);
}

.answer-text pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  overflow-x: auto;
  margin: 0.6rem 0;
  font-family: var(--mono);
  font-size: 0.86em;
  line-height: 1.5;
}

.answer-text pre code {
  background: none;
  padding: 0;
  border: none;
  color: var(--text);
}

.answer-text h1, .answer-text h2, .answer-text h3 {
  margin: 1rem 0 0.4rem;
  font-family: var(--mono);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.answer-text h1 { font-size: 1.3rem; }
.answer-text h2 { font-size: 1.15rem; }
.answer-text h3 { font-size: 1.05rem; }

.answer-text ul, .answer-text ol {
  margin: 0.3rem 0 0.6rem 1.5rem;
}
.answer-text li { margin-bottom: 0.25rem; }

.answer-text blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.4rem 0 0.4rem 0.75rem;
  color: var(--text-dim);
  margin: 0.5rem 0;
  font-style: italic;
  background: rgba(78, 205, 196, 0.03);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.answer-text table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.5rem 0;
  font-size: 0.9rem;
}
.answer-text th, .answer-text td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  text-align: left;
}
.answer-text th {
  background: var(--surface);
  color: var(--text-dim);
  font-weight: 600;
  font-family: var(--mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.answer-text strong { color: var(--text); font-weight: 700; }

/* ── Metadata Strip ─────────────────────────────────────── */
.metadata-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
}

/* Compact metadata bar (streaming pages) */
.metadata-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0;
  border-top: 1px solid var(--border);
  margin-top: 0.75rem;
}

.meta-pill {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.12rem 0.45rem;
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-dim);
  border: 1px solid var(--border);
  white-space: nowrap;
}

.meta-pill.deep {
  background: rgba(232, 168, 56, 0.12);
  border-color: rgba(232, 168, 56, 0.3);
  color: var(--accent3);
}

/* ── Collapsible Context Docs (streaming pages) ─────────── */
.context-docs-panel {
  margin-top: 0.5rem;
}

.context-docs-panel summary {
  font-size: 0.75rem;
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--mono);
  padding: 0.25rem 0;
  letter-spacing: 0.02em;
}

.context-docs-panel summary:hover {
  color: var(--accent);
}

.context-docs-panel[open] summary {
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.context-docs-panel .context-doc-list {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.context-docs-panel .context-doc-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid transparent;
  transition: border-color var(--transition);
}

.context-docs-panel .context-doc-item:hover {
  border-color: var(--border);
}

.doc-role {
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  min-width: 3.5rem;
}

.doc-name {
  color: var(--text);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-path {
  color: var(--text);
  min-width: 0;
  overflow-wrap: anywhere;
}

.doc-source-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.doc-source-link:hover {
  text-decoration: underline;
}

.doc-tokens {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
  white-space: nowrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.meta-label {
  color: var(--text-dim);
  text-transform: uppercase;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.meta-value {
  color: var(--text);
}

/* ── Tier Badges ────────────────────────────────────────── */
.tier-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.12rem 0.45rem;
  border-radius: 10px;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.tier-0 { background: rgba(52, 211, 153, 0.15); color: #34d399; }
.tier-1 { background: rgba(78, 205, 196, 0.15); color: var(--accent); }
.tier-2 { background: rgba(232, 168, 56, 0.15); color: var(--accent3); }
.tier-3 { background: rgba(248, 113, 113, 0.15); color: var(--danger); }

/* ── Confidence Tags ────────────────────────────────────── */
.confidence-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.1rem 0.4rem;
  border-radius: 8px;
  letter-spacing: 0.03em;
}

.confidence-tag.high    { background: rgba(52, 211, 153, 0.12); color: #34d399; }
.confidence-tag.medium  { background: rgba(232, 168, 56, 0.12); color: var(--accent3); }
.confidence-tag.low     { background: rgba(248, 113, 113, 0.12); color: var(--danger); }

/* ── Context docs list ──────────────────────────────────── */
.context-docs {
  margin-top: 0.5rem;
}

.context-docs summary {
  font-size: 0.78rem;
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--mono);
}

.context-doc-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.4rem;
}

.context-doc-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid transparent;
  transition: border-color var(--transition);
}
.context-doc-item:hover {
  border-color: var(--border);
}

.doc-score {
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 600;
  min-width: 3.5rem;
}

.doc-name {
  color: var(--text);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Debug Panel ────────────────────────────────────────── */
.debug-panel {
  margin-top: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
}

.debug-panel summary {
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--text-dim);
  cursor: pointer;
  letter-spacing: 0.03em;
}

.debug-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.75rem;
  margin-top: 0.5rem;
  font-size: 0.78rem;
}

.debug-key {
  color: var(--text-dim);
  font-family: var(--mono);
  white-space: nowrap;
}

.debug-val {
  color: var(--text);
  word-break: break-word;
  font-family: var(--mono);
}

/* ── HTMX Loading & Spinner ─────────────────────────────── */
.htmx-indicator { display: none; }
.htmx-request .htmx-indicator { display: inline-flex; }
.htmx-request.htmx-indicator { display: inline-flex; }

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Settings Page ──────────────────────────────────────── */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.setting-field label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  font-family: var(--mono);
  margin-bottom: 0.3rem;
}

.setting-value {
  font-size: 0.9rem;
  color: var(--text);
  word-break: break-all;
}

.model-select {
  min-width: 200px;
}

.model-badge {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* ── Utility Classes ────────────────────────────────────── */
.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mb-1  { margin-bottom: 0.5rem; }
.text-dim { color: var(--text-dim); }
.text-sm  { font-size: 0.85rem; }
.text-xs  { font-size: 0.75rem; }
.mono     { font-family: var(--mono); }

/* ── Chat Mode ──────────────────────────────────────────── */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 56px - 4rem);
  min-height: 400px;
  padding: 0;
  overflow: hidden;
}

.chat-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(19, 26, 36, 0.5);
  flex-wrap: wrap;
}

.chat-toolbar-left,
.chat-toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.chat-hint-select {
  width: auto;
  min-width: 120px;
  font-size: 0.8rem;
  padding: 0.3rem 0.5rem;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  scroll-behavior: smooth;
}

.chat-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  font-style: italic;
}

.chat-empty-inner {
  animation: heroFadeUp 0.5s ease both;
}

.chat-empty-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 0 10px rgba(78, 205, 196, 0.2));
  animation: emptyPulse 3s ease-in-out infinite;
}

@keyframes emptyPulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50%      { transform: scale(1.06); opacity: 1; }
}

.chat-empty-title {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.3rem;
  letter-spacing: -0.01em;
}

.chat-empty-sub {
  color: var(--text-dim);
  font-size: 0.88rem;
  font-style: normal;
  max-width: 380px;
  margin: 0 auto 1rem;
  line-height: 1.5;
}

.chat-empty-suggestions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}

.suggestion-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.35rem 0.75rem;
  border-radius: 16px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
  font-style: normal;
}

.suggestion-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(78, 205, 196, 0.06);
}

/* Follow-up suggestion chips (post-answer) */
.followup-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
  align-items: center;
}
.followup-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-right: 0.25rem;
  white-space: nowrap;
}

.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 85%;
  animation: msgSlideIn 0.25s ease;
}

@keyframes msgSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.chat-user {
  align-self: flex-end;
}

.chat-assistant {
  align-self: flex-start;
}

.chat-system {
  align-self: center;
  max-width: 90%;
}

.chat-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
  padding: 0 0.35rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.chat-user .chat-label { text-align: right; }

.chat-bubble {
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius);
  font-family: var(--font);
  font-weight: 400;
  font-size: 0.92rem;
  line-height: 1.6;
  word-break: break-word;
}

.chat-user .chat-bubble {
  background: linear-gradient(135deg, #3db8b0 0%, #4ecdc4 100%);
  color: #0a0e14;
  border-bottom-right-radius: 3px;
  font-weight: 500;
}

.chat-assistant .chat-bubble {
  background: var(--surface2);
  color: var(--text);
  border-bottom-left-radius: 3px;
  border: 1px solid var(--border);
}

/* Chat bubble markdown */
.chat-bubble p { margin-bottom: 0.4rem; }
.chat-bubble p:last-child { margin-bottom: 0; }
.chat-bubble code {
  font-family: var(--mono);
  font-size: 0.86em;
  padding: 0.1rem 0.3rem;
  border-radius: var(--radius-sm);
}
.chat-user .chat-bubble code {
  background: rgba(0,0,0,0.15);
}
.chat-assistant .chat-bubble code {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid rgba(36, 48, 64, 0.5);
}
.chat-bubble pre {
  margin: 0.4rem 0;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-size: 0.84em;
}
.chat-user .chat-bubble pre { background: rgba(0,0,0,0.15); }
.chat-assistant .chat-bubble pre {
  background: var(--surface);
  border: 1px solid var(--border);
}
.chat-bubble pre code {
  background: none;
  padding: 0;
  border: none;
  color: inherit;
}
.chat-bubble strong { font-weight: 600; }
.chat-bubble h1, .chat-bubble h2, .chat-bubble h3 {
  margin: 0.9rem 0 0.4rem;
  font-family: var(--font);
  font-weight: 650;
  line-height: 1.3;
  letter-spacing: -0.015em;
}
.chat-bubble h1 { font-size: 1.28rem; }
.chat-bubble h2 { font-size: 1.16rem; }
.chat-bubble h3 { font-size: 0.98rem; }
.chat-assistant .chat-bubble h1,
.chat-assistant .chat-bubble h2,
.chat-assistant .chat-bubble h3 { color: var(--accent); }
.chat-assistant .chat-bubble h3 { color: var(--text); }
.chat-bubble ul, .chat-bubble ol {
  margin: 0.2rem 0 0.4rem 1.2rem;
}

.chat-meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.15rem 0.35rem;
  margin-top: 0.2rem;
}

.evidence-panel {
  flex-basis: 100%;
  margin-top: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255,255,255,0.72);
  overflow: hidden;
}

.evidence-panel summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.65rem;
  color: var(--text);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 700;
}

.evidence-count {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
}

.evidence-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0 0.65rem 0.65rem;
}

.evidence-item {
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
  padding: 0.62rem 0;
  border-top: 1px solid var(--border);
}

.evidence-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  min-width: 0;
}

.evidence-copy {
  display: flex;
  flex-direction: column;
  gap: 0.16rem;
  min-width: 0;
}

.evidence-title {
  min-width: 0;
  color: var(--text);
  font-weight: 650;
  font-size: 0.86rem;
  line-height: 1.25;
}

.evidence-note {
  color: var(--text-dim);
  font-size: 0.72rem;
  line-height: 1.35;
}

.evidence-type {
  flex-shrink: 0;
  padding: 0.1rem 0.36rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  background: var(--surface2);
  font-family: var(--mono);
  font-size: 0.62rem;
  line-height: 1.3;
}

a.evidence-title,
.evidence-link {
  color: var(--accent);
  text-decoration: none;
}

a.evidence-title:hover,
.evidence-link:hover {
  text-decoration: underline;
}

.evidence-links {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.evidence-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.22rem 0.52rem;
  border: 1px solid rgba(78, 205, 196, 0.28);
  border-radius: 6px;
  background: rgba(78, 205, 196, 0.08);
  font-size: 0.72rem;
  font-weight: 650;
  line-height: 1.35;
}

.evidence-post-link {
  color: var(--accent2);
  border-color: rgba(255, 190, 118, 0.28);
  background: rgba(255, 190, 118, 0.08);
}

.evidence-download-link {
  color: #116b65;
  border-color: rgba(17, 107, 101, 0.26);
  background: rgba(78, 205, 196, 0.14);
}

.evidence-topic-link {
  color: var(--accent);
}

.evidence-link-kind {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 700;
}

.evidence-path {
  grid-column: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.evidence-badges {
  grid-column: 2;
  grid-row: 1 / span 2;
  display: flex;
  align-items: flex-start;
  gap: 0.25rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.evidence-badge {
  padding: 0.08rem 0.32rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.62rem;
  background: var(--surface2);
}

[data-theme="dark"] .evidence-panel {
  background: rgba(19, 26, 36, 0.84);
}

[data-theme="dark"] .evidence-download-link {
  color: var(--accent);
}

@media (max-width: 680px) {
  .evidence-main {
    flex-direction: column;
    gap: 0.35rem;
  }
  .evidence-badges {
    grid-column: 1;
    grid-row: auto;
    justify-content: flex-start;
  }
}

/* ── Chat Input ─────────────────────────────────────────── */
.chat-input-form {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  background: rgba(19, 26, 36, 0.5);
}

.chat-input-row {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.chat-input-row textarea {
  flex: 1;
  resize: none;
  min-height: 42px;
  max-height: 120px;
  font-size: 0.92rem;
  line-height: 1.5;
  padding: 0.55rem 0.75rem;
}

.chat-input-row .btn {
  padding: 0.55rem 1.25rem;
  white-space: nowrap;
  align-self: flex-end;
}

/* ── Attach / Image Upload Button ───────────────────────── */
.btn-attach {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.4rem 0.55rem;
  color: var(--text-dim);
  transition: color 0.15s, border-color 0.15s, transform 0.15s;
  flex-shrink: 0;
  align-self: flex-end;
  line-height: 1;
}
.btn-attach:hover { color: var(--accent); border-color: var(--accent); }
.btn-attach.uploading {
  opacity: 0.5;
  pointer-events: none;
  animation: pulse-attach 0.8s ease-in-out infinite;
}
@keyframes pulse-attach { 0%,100% { opacity: 0.5; } 50% { opacity: 0.9; } }

/* ── Image Preview Row ──────────────────────────────────── */
.image-preview-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0;
}
.image-preview-thumb {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.25rem 0.5rem 0.25rem 0.25rem;
  max-width: 280px;
}
.image-preview-thumb img {
  height: 48px;
  max-width: 80px;
  object-fit: cover;
  border-radius: 5px;
}
.image-preview-name {
  font-size: 0.75rem;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 140px;
}
.image-preview-remove {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: none;
  background: var(--danger, #f87171);
  color: #fff;
  font-size: 0.7rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.image-preview-remove:hover { background: #ef4444; }

/* ── User bubble image thumbnail ────────────────────────── */
.user-image-thumb {
  max-width: 200px;
  max-height: 150px;
  border-radius: 6px;
  margin-bottom: 0.35rem;
  display: block;
}

/* ── Drag-and-drop overlay ──────────────────────────────── */
.drag-over {
  outline: 2px dashed var(--accent) !important;
  outline-offset: -4px;
  background: rgba(99, 102, 241, 0.05) !important;
}

/* ── Guided Mode ────────────────────────────────────────── */
.guided-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
  min-height: calc(100vh - 56px - 5rem);
}

.guided-sidebar {
  position: sticky;
  top: calc(56px + 1.5rem);
  align-self: start;
  max-height: calc(100vh - 56px - 3rem);
  overflow-y: auto;
}

.step-list { list-style: none; }

.step-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.5rem 0.3rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  cursor: default;
  transition: color var(--transition);
}

.step-item.current {
  color: var(--text);
  font-weight: 600;
}

.step-item.completed {
  color: var(--accent2);
}

.step-item.upcoming {
  opacity: 0.5;
}

/* Step marker (circle) */
.step-marker {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: all var(--transition);
  font-family: var(--mono);
}

.step-item.current .step-marker {
  border-color: var(--accent);
  background: rgba(78, 205, 196, 0.12);
  color: var(--accent);
  box-shadow: 0 0 8px rgba(78, 205, 196, 0.15);
}

.step-item.completed .step-marker {
  border-color: var(--accent2);
  background: rgba(52, 211, 153, 0.12);
  color: var(--accent2);
}

.step-name { padding-top: 1px; }

/* Connector line between steps */
.step-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 10px;
  top: calc(0.5rem + 22px + 2px);
  width: 2px;
  height: calc(100% - 22px - 0.5rem);
  background: var(--border);
}

.step-item.completed:not(:last-child)::after {
  background: var(--accent2);
}

.guided-main {
  padding: 0.5rem 0;
}

.guided-welcome {
  text-align: center;
  padding: 2rem 1rem;
  animation: heroFadeUp 0.5s ease both;
}

.guided-welcome h2 {
  font-family: var(--mono);
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.guided-welcome p {
  color: var(--text-dim);
  max-width: 480px;
  margin: 0 auto 1.5rem;
}

/* Guided step content entrance */
.guided-step-header {
  animation: heroFadeUp 0.4s ease both;
}

.guided-step-answer {
  animation: heroFadeUp 0.4s ease both;
  animation-delay: 0.1s;
}

.guided-followup-section {
  animation: heroFadeUp 0.4s ease both;
  animation-delay: 0.18s;
}

.guided-nav-buttons {
  animation: heroFadeUp 0.4s ease both;
  animation-delay: 0.25s;
}

.step-header {
  margin-bottom: 1rem;
}

.step-header h2 {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.step-header .step-subtitle {
  color: var(--text-dim);
  font-size: 0.92rem;
}

.followup-section {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.followup-section h4 {
  font-size: 0.88rem;
  font-family: var(--mono);
  color: var(--accent3);
  margin-bottom: 0.75rem;
}

.followup-section textarea {
  margin-bottom: 0.5rem;
}

.guided-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.guided-complete {
  text-align: center;
  padding: 3rem 1rem;
}

.guided-complete h2 {
  color: var(--accent2);
  font-family: var(--mono);
  margin-bottom: 0.5rem;
}

.guided-complete p {
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

/* ── Typewriter Animation ───────────────────────────────── */
.typewriter-pending {
  visibility: hidden;
  position: absolute;
  pointer-events: none;
}

.typewriter-cursor::after {
  content: '';
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 1px;
  vertical-align: text-bottom;
  animation: twBlink 0.7s step-end infinite;
}

@keyframes twBlink { 50% { opacity: 0; } }

/* ── Small Button Variant ───────────────────────────────── */
.btn-sm {
  padding: 0.35rem 0.8rem;
  font-size: 0.78rem;
}

/* ── Feedback System ────────────────────────────────────── */
.feedback-wrapper {
  margin-top: 0.5rem;
}

.btn-feedback {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-feedback:hover {
  border-color: var(--accent3);
  color: var(--accent3);
  background: rgba(232, 168, 56, 0.06);
}

.feedback-form-container {
  margin-top: 0.5rem;
  padding: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--accent3);
  border-radius: var(--radius);
}

.feedback-form .feedback-field {
  margin-bottom: 0.6rem;
}
.feedback-form .feedback-field label {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}
.feedback-form textarea {
  min-height: 60px;
  font-size: 0.85rem;
}
.feedback-form input[type="file"] {
  font-size: 0.8rem;
  color: var(--text-dim);
  padding: 0.3rem 0;
}

/* ── Paste / drop zone for images ── */
.paste-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.paste-zone:hover,
.paste-zone:focus {
  border-color: var(--accent3);
  background: rgba(232, 168, 56, 0.04);
  outline: none;
}
.paste-zone-active {
  border-color: var(--accent3) !important;
  background: rgba(232, 168, 56, 0.08) !important;
}

.paste-zone-hint {
  font-size: 0.78rem;
  color: var(--text-dim);
}
.paste-browse-link {
  color: var(--accent);
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.78rem;
}

.paste-preview {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.paste-preview img {
  max-height: 80px;
  max-width: 200px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  object-fit: contain;
}

/* Attachment chip */
.paste-attachment {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  font-size: 0.78rem;
  color: var(--text);
}
.paste-attach-icon {
  font-size: 0.9rem;
}
.paste-attach-name {
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.paste-remove-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 22px;
  height: 22px;
  font-size: 0.7rem;
  cursor: pointer;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.paste-remove-btn:hover {
  border-color: #e74c3c;
  color: #e74c3c;
  background: rgba(231, 76, 60, 0.08);
}

.feedback-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.feedback-success {
  padding: 0.5rem 0.75rem;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid var(--accent2);
  border-radius: var(--radius-sm);
  color: var(--accent2);
  font-size: 0.82rem;
  font-weight: 600;
  margin-top: 0.4rem;
}

/* ── Streaming Cursor ───────────────────────────────────── */
.streaming-cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink-stream 0.8s step-end infinite;
}
@keyframes blink-stream {
  50% { opacity: 0; }
}

/* ── Loading indicator inline ───────────────────────────── */
#loading-indicator {
  align-items: center;
  gap: 0.5rem;
}

/* ── Answer text during streaming ───────────────────────── */
#stream-answer-text {
  line-height: 1.72;
  font-size: 0.95rem;
  animation: fadeIn 0.3s ease;
}
#stream-answer-text p { margin-bottom: 0.5rem; }
#stream-answer-text p:last-child { margin-bottom: 0; }
#stream-answer-text ol, #stream-answer-text ul {
  margin: 0.3rem 0 0.5rem 1.4rem;
}
#stream-answer-text code {
  background: var(--surface2);
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.88em;
  color: var(--accent);
  border: 1px solid rgba(36, 48, 64, 0.5);
}
#stream-answer-text strong { color: var(--text); font-weight: 700; }
#stream-answer-text h1, #stream-answer-text h2, #stream-answer-text h3 {
  margin: 0.6rem 0 0.3rem;
  color: var(--accent);
  font-family: var(--mono);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Chat bubble during streaming ───────────────────────── */
#stream-chat-bubble code {
  background: rgba(0,0,0,0.2);
  padding: 0.1rem 0.3rem;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.88em;
}

/* ── Scrollbar styling ──────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-hl);
}

/* ── Selection ──────────────────────────────────────────── */
::selection {
  background: rgba(78, 205, 196, 0.25);
  color: var(--text);
}

/* ── Hero Section (Landing Page) ───────────────────────── */
.hero {
  text-align: center;
  padding: 3.5rem 1rem 2rem;
}

/* Staggered entrance animation for hero children */
.hero-icon,
.hero-title,
.hero-tagline,
.hero-search {
  animation: heroFadeUp 0.6s ease both;
}
.hero-icon    { animation-delay: 0s; }
.hero-title   { animation-delay: 0.08s; }
.hero-tagline { animation-delay: 0.16s; }
.hero-search  { animation-delay: 0.24s; }

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-icon {
  font-size: 3rem;
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 0 12px rgba(78, 205, 196, 0.25));
  display: inline-block;
}

.hero-title {
  font-family: var(--mono);
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), #6ee7de, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.hero-tagline {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 2rem;
  line-height: 1.55;
  letter-spacing: 0.01em;
}

.hero-search {
  max-width: 640px;
  margin: 0 auto;
}

.hero-input-wrap {
  display: flex;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.hero-input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.12), 0 0 20px rgba(78, 205, 196, 0.06);
}

.hero-input-wrap input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 1.05rem;
  padding: 0.85rem 1.25rem;
  outline: none;
  font-family: var(--font);
}

.hero-input-wrap input::placeholder {
  color: var(--text-dim);
}

.hero-ask-btn {
  border-radius: 0;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-left: 1px solid var(--border);
}

.advanced-options {
  margin-top: 0.75rem;
  text-align: left;
}

.advanced-options summary {
  cursor: pointer;
  font-size: 0.85rem;
  text-align: center;
}

/* ── Quick Topics ──────────────────────────────────────── */
.quick-topics {
  margin-top: 2rem;
  animation: heroFadeUp 0.6s ease both;
  animation-delay: 0.35s;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
  font-family: var(--mono);
}

.topic-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.topic-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.86rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  font-family: var(--font);
}

.topic-btn:hover {
  background: var(--surface2);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Mode Cards ────────────────────────────────────────── */
.mode-cards {
  margin-top: 2.5rem;
  animation: heroFadeUp 0.6s ease both;
  animation-delay: 0.45s;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1rem;
  background: rgba(19, 26, 36, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

.mode-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(78, 205, 196, 0.08);
  text-decoration: none;
}

.mode-icon {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 0 6px rgba(78, 205, 196, 0.15));
}

.mode-label {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.mode-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.4;
}

/* ── Inline Settings Bar (Ask page) ─────────────────────── */
.inline-settings-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 0.75rem;
  animation: heroFadeUp 0.5s ease both;
  animation-delay: 0.32s;
}

.inline-setting {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.inline-setting-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0;
  white-space: nowrap;
}

.inline-select {
  width: auto;
  min-width: 110px;
  font-size: 0.78rem;
  padding: 0.2rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
}

.inline-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(78, 205, 196, 0.1);
}

.inline-status {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent2);
}

/* ── Guest Banner ──────────────────────────────────────── */
.guest-banner {
  text-align: center;
  padding: 0.75rem 1rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: 2rem;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.guest-banner a {
  color: var(--accent3);
  font-weight: 600;
}

/* ── Admin Panel ───────────────────────────────────────── */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
}

.admin-table th,
.admin-table td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.admin-table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-family: var(--mono);
}

.admin-table tr:hover td {
  background: var(--surface2);
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--mono);
}

.badge-admin  { background: rgba(78, 205, 196, 0.15); color: var(--accent); }
.badge-user   { background: rgba(52, 211, 153, 0.15); color: var(--accent2); }
.badge-guest  { background: rgba(126, 143, 166, 0.15); color: var(--text-dim); }
.badge-active { background: rgba(52, 211, 153, 0.15); color: var(--accent2); }
.badge-inactive { background: rgba(248, 113, 113, 0.15); color: var(--danger); }
.badge-verified { background: rgba(52, 211, 153, 0.15); color: var(--accent2); }
.badge-unverified { background: rgba(232, 168, 56, 0.16); color: var(--accent3); }
.badge-security { background: rgba(248, 113, 113, 0.16); color: var(--danger); }

.account-alert {
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.9rem;
}

.account-alert-success {
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.28);
  color: var(--accent2);
}

.account-alert-error {
  background: rgba(248, 113, 113, 0.12);
  border-color: rgba(248, 113, 113, 0.28);
  color: var(--danger);
}

.account-verification-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  padding: 0.8rem 1rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.account-verification-banner p {
  margin: 0.25rem 0 0;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ── Answer Toolbar (ask page) ──────────────────────────── */
.answer-toolbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

/* ── Copy-Answer Button ─────────────────────────────────── */
.btn-copy-answer {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.78rem;
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: var(--font);
}
.btn-copy-answer:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(78, 205, 196, 0.06);
}
.btn-copy-answer.copied {
  border-color: var(--accent2);
  color: var(--accent2);
  background: rgba(52, 211, 153, 0.08);
}

/* ── Chat Bubble Wrapper (for hover copy button) ────────── */
.chat-bubble-wrap {
  position: relative;
}
.btn-copy-bubble {
  position: absolute;
  top: 0.35rem;
  right: 0.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.72rem;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, border-color 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
.chat-bubble-wrap:hover .btn-copy-bubble,
.btn-copy-bubble:focus { opacity: 1; }
.chat-bubble-wrap:hover .btn-export,
.btn-export:focus { opacity: 1 !important; }
.btn-copy-bubble:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-copy-bubble.copied {
  opacity: 1;
  border-color: var(--accent2);
  color: var(--accent2);
}

/* ── Code Block Copy Button ─────────────────────────────── */
.code-copy-btn {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.72rem;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, border-color 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
pre:hover .code-copy-btn,
.code-copy-btn:focus { opacity: 1; }
.code-copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.code-copy-btn.copied {
  opacity: 1;
  border-color: var(--accent2);
  color: var(--accent2);
}

/* ── Search-Type Pill Toggle ────────────────────────────── */
.search-type-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: help;
  position: relative;
}

.toggle-label {
  white-space: nowrap;
}

.pill-toggle {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  padding: 2px;
  gap: 2px;
}

.pill-opt {
  all: unset;
  font-family: var(--font);
  font-size: 0.78rem;
  padding: 0.2rem 0.65rem;
  border-radius: 16px;
  color: var(--text-dim);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}

.pill-opt:hover {
  color: var(--text);
  background: var(--surface2);
}

.pill-opt.active {
  background: var(--accent);
  color: #0a0e14;
  font-weight: 600;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  header {
    height: auto;
    min-height: 56px;
  }

  .header-inner {
    padding: 0 0.75rem;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .header-model { display: none; }

  /* Show hamburger, hide nav by default */
  .hamburger { display: flex; }

  /* Theme toggle & rate indicator stay in top row */
  .theme-toggle-btn { margin-left: 0; }

  nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding: 0.4rem 0;
    border-top: 1px solid var(--border);
    margin-top: 0.25rem;
    order: 10; /* push below top row when wrapping */
  }
  nav.nav-open { display: flex; }

  .nav-link {
    font-size: 0.85rem;
    padding: 0.45rem 0.65rem;
    width: 100%;
  }

  main {
    padding: 1rem 0.75rem 2rem;
  }

  .hero { padding: 2rem 0.5rem 1.5rem; }
  .hero-title { font-size: 1.6rem; }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .guided-layout {
    grid-template-columns: 1fr;
  }

  .guided-sidebar {
    position: static;
    max-height: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
  }

  .chat-toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .chat-toolbar-right {
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .form-row {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.35rem; }
  .hero-tagline { font-size: 0.92rem; }

  .hero-input-wrap input {
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
  }

  .hero-ask-btn {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .topic-btn {
    font-size: 0.82rem;
    padding: 0.4rem 0.8rem;
  }

  .chat-msg { max-width: 95%; }
}

/* ================================================================
   UX Polish — Toast Notifications, Keyboard Shortcuts,
   Thumbs Up/Down, Admin Stats, Export Button
   ================================================================ */

/* ── Toast Notifications ───────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column-reverse;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  color: var(--text);
  background: var(--surface2);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  animation: toastSlideIn 0.3s ease forwards;
  max-width: 360px;
  line-height: 1.4;
}

.toast.toast-success { border-color: var(--accent2); }
.toast.toast-success .toast-icon { color: var(--accent2); }
.toast.toast-info    { border-color: var(--accent); }
.toast.toast-info .toast-icon    { color: var(--accent); }
.toast.toast-error   { border-color: var(--danger); }
.toast.toast-error .toast-icon   { color: var(--danger); }
.toast.toast-warning { border-color: var(--accent3); }
.toast.toast-warning .toast-icon { color: var(--accent3); }

.toast-icon { font-size: 1.05rem; flex-shrink: 0; }

.toast.toast-exit { animation: toastSlideOut 0.25s ease forwards; }

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toastSlideOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}

/* ── Keyboard Shortcuts Modal ──────────────────────────── */
.shortcut-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.15s ease;
}

.shortcut-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}

.shortcut-modal h3 {
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--accent);
}

.shortcut-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.shortcut-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.shortcut-list li:last-child { border-bottom: none; }

.shortcut-list kbd {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  background: var(--surface2);
  border: 1px solid var(--border-hl);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  min-width: 1.6rem;
  text-align: center;
}

.shortcut-close {
  display: block;
  margin: 1rem auto 0;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.3rem 1.2rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.82rem;
  transition: all 0.15s;
}
.shortcut-close:hover { border-color: var(--accent); color: var(--accent); }

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Export / Download Button ──────────────────────────── */
.btn-export {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.78rem;
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: var(--font);
}
.btn-export:hover {
  border-color: var(--accent3);
  color: var(--accent3);
  background: rgba(232, 168, 56, 0.06);
}

/* ── Thumbs Up / Down Quick Rating ─────────────────────── */
.quick-rating {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: 0.5rem;
}

.btn-thumb {
  background: none;
  border: 1px solid transparent;
  color: var(--text-dim);
  font-size: 1rem;
  padding: 0.15rem 0.3rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1;
  opacity: 0.6;
}
.btn-thumb:hover {
  opacity: 1;
  border-color: var(--border-hl);
  background: var(--surface2);
}
.btn-thumb.voted {
  opacity: 1;
  border-color: var(--accent);
  background: rgba(78, 205, 196, 0.1);
  color: var(--accent);
}
.btn-thumb.voted-down {
  border-color: var(--danger);
  background: rgba(248, 113, 113, 0.1);
  color: var(--danger);
}
.rating-thanks {
  font-size: 0.72rem;
  color: var(--accent2);
  font-family: var(--mono);
}

/* ── Admin Stats Cards ─────────────────────────────────── */
.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  text-align: center;
}

.stat-card .stat-value {
  display: block;
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.stat-card .stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.3rem;
}

.stat-card.stat-accent2 .stat-value { color: var(--accent2); }
.stat-card.stat-accent3 .stat-value { color: var(--accent3); }
.stat-card.stat-danger  .stat-value { color: var(--danger); }

/* Admin analytics charts grid */
.admin-charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.chart-card {
  padding: 1rem 1.25rem !important;
  position: relative;
}
.chart-wrapper {
  position: relative;
  width: 100%;
  height: 220px;
}
.chart-title {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 0 0 0.75rem;
  font-weight: 500;
}

/* Top models mini-bar chart */
.model-bar-chart {
  margin-top: 0.5rem;
}
.model-bar-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
}
.model-bar-label {
  min-width: 120px;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.75rem;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.model-bar-track {
  flex: 1;
  height: 8px;
  background: var(--surface2);
  border-radius: 4px;
  overflow: hidden;
}
.model-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 4px;
  transition: width 0.5s ease;
}
.model-bar-count {
  min-width: 30px;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ── Accessibility Focus Visible ───────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10001;
  background: var(--accent);
  color: var(--bg);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0.5rem;
  text-decoration: none;
  color: var(--bg);
}

/* ── Light Theme Extras ────────────────────────────────── */
[data-theme="light"] .shortcut-overlay { background: rgba(0,0,0,0.3); }
[data-theme="light"] .shortcut-modal  { box-shadow: 0 8px 40px rgba(0,0,0,0.12); }
[data-theme="light"] .logo-icon       { filter: none; }
[data-theme="light"] .chat-user .chat-bubble {
  background: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
  color: #fff;
}
[data-theme="light"] .chat-user .chat-bubble pre { background: rgba(0,0,0,0.08); }

/* ── Error Card & Retry Button (R2.1) ─────────────────── */
.error-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--danger-bg, rgba(248,113,113,0.08));
  border: 1px solid var(--danger, #f87171);
  text-align: center;
}
.error-card-icon {
  font-size: 2rem;
  line-height: 1;
}
.error-card-msg {
  color: var(--danger, #f87171);
  font-size: 0.95rem;
  line-height: 1.5;
}
.error-card-partial {
  color: var(--text-dim);
  font-size: 0.82rem;
  font-style: italic;
  margin-top: -0.25rem;
}
.btn-retry {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--danger, #f87171);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-retry:hover { background: #ef4444; transform: translateY(-1px); }
.btn-retry:active { transform: translateY(0); }

/* Chat bubble error variant */
.chat-bubble .error-card {
  padding: 1rem;
  border: none;
  background: none;
}

/* ── Skeleton Loading Placeholders (R2.3) ─────────────── */
@keyframes skeleton-pulse {
  0% { opacity: 0.6; }
  50% { opacity: 0.3; }
  100% { opacity: 0.6; }
}
.skeleton-block {
  border-radius: var(--radius-sm);
  background: var(--surface2, #2a2a3a);
  animation: skeleton-pulse 1.4s ease-in-out infinite;
}
.skeleton-answer {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.25rem 0;
}
.skeleton-line {
  height: 0.85rem;
  border-radius: 4px;
  background: var(--surface2, #2a2a3a);
  animation: skeleton-pulse 1.4s ease-in-out infinite;
}
.skeleton-line:nth-child(1) { width: 90%; }
.skeleton-line:nth-child(2) { width: 100%; animation-delay: 0.1s; }
.skeleton-line:nth-child(3) { width: 75%; animation-delay: 0.2s; }
.skeleton-line:nth-child(4) { width: 85%; animation-delay: 0.3s; }
.skeleton-line:nth-child(5) { width: 60%; animation-delay: 0.4s; }
.skeleton-chat-bubble {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 200px;
}
.skeleton-chat-bubble .skeleton-line:nth-child(1) { width: 80%; }
.skeleton-chat-bubble .skeleton-line:nth-child(2) { width: 95%; }
.skeleton-chat-bubble .skeleton-line:nth-child(3) { width: 65%; }

/* ================================================================= */
/* Conversation History Sidebar                                      */
/* ================================================================= */

/* Flex wrapper around sidebar + main content */
.page-with-sidebar {
  display: flex;
  min-height: calc(100vh - 56px);    /* minus header */
  width: 100%;
}

/* When sidebar is present, main stretches to fill remaining space */
.page-with-sidebar > main {
  flex: 1;
  max-width: 960px;
  margin: 0 auto;
}

/* Sidebar panel */
.history-sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--surface, #141a24);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: calc(100vh - 56px);
  position: sticky;
  top: 56px;                         /* below header */
  overflow: hidden;
  transition: width 0.25s ease, min-width 0.25s ease, opacity 0.2s ease;
  z-index: 10;
}

.history-sidebar.collapsed {
  width: 0;
  min-width: 0;
  border-right: none;
  opacity: 0;
  pointer-events: none;
}

/* Sidebar header row */
.sidebar-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0.75rem 0.5rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-header .btn-new-chat {
  flex: 1;
  padding: 0.45rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: background 0.15s;
}
.sidebar-header .btn-new-chat:hover { background: var(--accent-hover, #4196f0); }

.btn-collapse-sidebar {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.25rem;
  border-radius: 4px;
  line-height: 1;
}
.btn-collapse-sidebar:hover { background: var(--surface2); }

/* Search input */
.sidebar-search {
  padding: 0.5rem 0.75rem;
  flex-shrink: 0;
}
.sidebar-search input {
  width: 100%;
  padding: 0.4rem 0.65rem;
  font-size: 0.78rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface2, #1e2636);
  color: var(--text);
  outline: none;
}
.sidebar-search input:focus {
  border-color: var(--accent);
}
.sidebar-search input::placeholder {
  color: var(--text-dim);
}

/* Scrollable conversation list */
.sidebar-convos {
  flex: 1;
  overflow-y: auto;
  padding: 0.25rem 0;
}

/* Individual conversation item */
.sidebar-conv-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  cursor: pointer;
  border-radius: 6px;
  margin: 1px 0.4rem;
  transition: background 0.12s;
  position: relative;
}
.sidebar-conv-item:hover {
  background: var(--surface2, #1e2636);
}
.sidebar-conv-item.active {
  background: var(--surface2, #1e2636);
  border-left: 3px solid var(--accent);
  padding-left: calc(0.75rem - 3px);
}

.sidebar-conv-title {
  flex: 1;
  font-size: 0.8rem;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
}

.sidebar-conv-meta {
  font-size: 0.68rem;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Actions (shown on hover) */
.sidebar-conv-actions {
  display: none;
  align-items: center;
  gap: 0.2rem;
  flex-shrink: 0;
}
.sidebar-conv-item:hover .sidebar-conv-actions {
  display: flex;
}
.sidebar-conv-item:hover .sidebar-conv-meta {
  display: none;
}
.sidebar-conv-actions button {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.75rem;
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
  line-height: 1;
}
.sidebar-conv-actions button:hover {
  background: var(--surface, #141a24);
  color: var(--text);
}

/* Empty state */
.sidebar-empty {
  padding: 1.5rem 1rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* Toggle button (visible when sidebar is collapsed) */
.btn-open-sidebar {
  position: fixed;
  left: 0;
  top: 56px;
  z-index: 20;
  background: var(--surface, #141a24);
  border: 1px solid var(--border);
  border-left: none;
  border-radius: 0 6px 6px 0;
  padding: 0.5rem 0.35rem;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1;
  display: none;   /* shown via JS when collapsed */
}
.btn-open-sidebar:hover { background: var(--surface2); }

.sidebar-open-label {
  display: none;
}

/* ── Responsive ──────────────────────────────── */
@media (max-width: 768px) {
  .history-sidebar {
    position: fixed;
    left: 0;
    top: 56px;
    height: calc(100vh - 56px);
    z-index: 100;
    box-shadow: 4px 0 20px rgba(0,0,0,0.4);
  }
  .history-sidebar.collapsed {
    box-shadow: none;
  }
  /* Backdrop overlay */
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    top: 56px;
    background: rgba(0,0,0,0.5);
    z-index: 99;
  }
  .sidebar-backdrop.active {
    display: block;
  }
  .btn-open-sidebar {
    left: 0.7rem;
    top: 70px;
    width: auto;
    height: 32px;
    padding: 0 0.7rem;
    gap: 0.4rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    z-index: 101;
  }
  .sidebar-open-label {
    display: inline;
  }
}

/* ── Analytics Dashboard ──────────────────────────────── */
.analytics-section-title {
  margin: 1.5rem 0 0.75rem;
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--text-dim);
  font-weight: 500;
}

.username-badge {
  display: inline-block;
  background: var(--elevated);
  color: var(--accent);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
}

.scope-badge {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  font-size: 0.72rem;
  font-family: var(--mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: var(--elevated);
  color: var(--text-dim);
}
.scope-badge.scope-calczaf { color: var(--accent); border: 1px solid rgba(78,205,196,0.3); }
.scope-badge.scope-standard { color: var(--accent2); border: 1px solid rgba(167,139,250,0.3); }
.scope-badge.scope-pfe { color: var(--accent3); border: 1px solid rgba(232,168,56,0.3); }
.scope-badge.scope-auto { color: var(--text-dim); border: 1px solid rgba(255,255,255,0.1); }

.recent-questions-card {
  padding: 0 !important;
  max-height: 500px;
  overflow-y: auto;
}

.recent-q-item {
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.recent-q-item:last-child { border-bottom: none; }
.recent-q-item:hover { background: var(--elevated); }
.recent-q-clickable {
  cursor: pointer;
}
.recent-q-clickable:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  background: var(--elevated);
}
.recent-q-disabled {
  cursor: default;
  opacity: 0.78;
}

.recent-q-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
  flex-wrap: wrap;
}

.recent-q-time {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: var(--mono);
}

.recent-q-content {
  font-size: 0.88rem;
  color: var(--text-primary);
  line-height: 1.45;
}

/* ── Analytics conversation modal ─────────────────────── */
.conversation-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}
.conversation-modal {
  width: min(1120px, 100%);
  max-height: 88vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg-base, var(--bg));
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.conversation-modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.conversation-modal-header h3 {
  margin: 0;
  font-size: 1.08rem;
}
.conversation-modal-subtitle {
  margin-top: 0.25rem;
  color: var(--text-dim);
  font-size: 0.82rem;
}
.conversation-modal-body {
  overflow: auto;
  padding: 1rem;
}
.conversation-modal-state {
  padding: 2rem;
  color: var(--text-dim);
  text-align: center;
}
.conversation-modal-error {
  color: var(--danger);
}
.conversation-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.85fr);
  gap: 1rem;
}
.conversation-detail-section {
  min-width: 0;
}
.conversation-detail-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}
.conversation-detail-heading h4 {
  margin: 0;
  font-size: 0.82rem;
  font-family: var(--mono);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.conversation-turns,
.conversation-feedback-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.conversation-turn,
.conversation-feedback-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 0.8rem 0.9rem;
}
.conversation-turn-user {
  border-left: 3px solid var(--accent3);
}
.conversation-turn-assistant {
  border-left: 3px solid var(--accent);
}
.conversation-turn-meta,
.conversation-feedback-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
  color: var(--text-dim);
  font-size: 0.75rem;
  font-family: var(--mono);
}
.conversation-turn-meta span {
  color: var(--text);
  font-weight: 700;
}
.conversation-turn-content,
.conversation-feedback-text,
.conversation-feedback-response,
.conversation-feedback-notes {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 0.88rem;
  line-height: 1.48;
}
.conversation-feedback-text {
  padding: 0.65rem;
  background: rgba(78, 205, 196, 0.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
}
.conversation-feedback-response,
.conversation-feedback-notes {
  margin-top: 0.65rem;
  padding: 0.65rem;
  background: var(--surface2);
  border-radius: 6px;
  color: var(--text-dim);
  max-height: 220px;
  overflow: auto;
}
.conversation-feedback-notes {
  color: var(--text);
  border: 1px solid var(--border);
}

/* Responsive charts for analytics */
@media (max-width: 768px) {
  .admin-charts-grid[style*="grid-template-columns: 2fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
  .conversation-detail-grid {
    grid-template-columns: 1fr;
  }
  .conversation-modal {
    max-height: 92vh;
  }
}

/* ═══════════════════════════════════════════════════════════
   Admin Feedback Review
   ═══════════════════════════════════════════════════════════ */

/* ── Filter bar ─────────────────────────────────── */
.fb-filters-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  flex-wrap: wrap;
}
.fb-filter-label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.fb-filter-label select,
.fb-filter-label input {
  padding: 0.4rem 0.6rem;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--corner);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: var(--font-mono);
}
.fb-filter-search { flex: 1; min-width: 180px; }
.fb-filter-count {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ── Table rows ─────────────────────────────────── */
.fb-row { cursor: pointer; }
.fb-row:hover { background: var(--bg-elevated); }

/* ── Status badges ──────────────────────────────── */
.fb-status-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.fb-status-new {
  background: rgba(78, 205, 196, 0.15);
  color: #4ecdc4;
  border: 1px solid rgba(78, 205, 196, 0.3);
}
.fb-status-reviewed {
  background: rgba(167, 139, 250, 0.15);
  color: #a78bfa;
  border: 1px solid rgba(167, 139, 250, 0.3);
}
.fb-status-resolved {
  background: rgba(52, 211, 153, 0.15);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.3);
}

/* ── Mode badges ────────────────────────────────── */
.fb-mode-badge {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: var(--corner);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.fb-mode-quick_rating { color: #fbbf24; border-color: rgba(251, 191, 36, 0.3); }
.fb-mode-chat { color: #60a5fa; border-color: rgba(96, 165, 250, 0.3); }
.fb-mode-single { color: #f472b6; border-color: rgba(244, 114, 182, 0.3); }

/* ── Modal overlay ──────────────────────────────── */
.fb-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}
.fb-modal {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--corner-lg, 10px);
  width: 100%;
  max-width: 720px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.fb-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.fb-modal-header h3 { margin: 0; font-size: 1.1rem; }
.fb-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
}
.fb-modal-close:hover { color: var(--text-primary); }
.fb-modal-body { padding: 1.25rem; }

/* ── Meta row ───────────────────────────────────── */
.fb-meta-row {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

/* ── Detail sections ────────────────────────────── */
.fb-detail-section { margin-bottom: 1rem; }
.fb-detail-section h4 {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}
.fb-detail-text {
  font-size: 0.88rem;
  color: var(--text-primary);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}
.fb-detail-response {
  max-height: 200px;
  overflow-y: auto;
  padding: 0.75rem;
  background: var(--bg-elevated);
  border-radius: var(--corner);
  border: 1px solid var(--border);
}
.fb-detail-feedback {
  padding: 0.75rem;
  background: rgba(78, 205, 196, 0.05);
  border-left: 3px solid #4ecdc4;
  border-radius: 0 var(--corner) var(--corner) 0;
}
.fb-detail-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 1.5rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}
.fb-detail-meta-grid code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
}

/* ── Screenshot ─────────────────────────────────── */
.fb-screenshot {
  max-width: 100%;
  border-radius: var(--corner);
  border: 1px solid var(--border);
  margin-top: 0.5rem;
}

/* ── Admin controls in modal ────────────────────── */
.fb-admin-controls {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.fb-admin-row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
}
.fb-admin-row select {
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--corner);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: var(--font-mono);
}
.fb-admin-controls textarea {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--corner);
  background: var(--bg-elevated);
  color: var(--text-primary);
  resize: vertical;
}

/* Generic buttons for modal */
.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  border-radius: var(--corner);
  cursor: pointer;
  font-family: var(--font-mono);
  border: 1px solid var(--border);
}
.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-primary:hover { opacity: 0.85; }
.btn-danger {
  background: rgba(248, 113, 113, 0.15);
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.3);
}
.btn-danger:hover { background: rgba(248, 113, 113, 0.25); }

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 768px) {
  .fb-filters-row { flex-direction: column; }
  .fb-modal { max-width: 100%; max-height: 92vh; }
  .fb-detail-meta-grid { grid-template-columns: 1fr; }
}

/* =================================================================
   Probe Software Assistant Workspace Redesign
   ================================================================= */

[data-theme="light"] {
  --bg:         #f3f6f9;
  --surface:    #ffffff;
  --surface2:   #f7f9fc;
  --surface3:   #edf2f7;
  --border:     #d8e0ea;
  --border-hl:  #aebccd;
  --text:       #16202d;
  --text-dim:   #667589;
  --accent:     #0b7f86;
  --accent-hover: #075f65;
  --accent2:    #2f7d32;
  --accent3:    #b57918;
  --shadow-sm:  0 6px 18px rgba(22, 32, 45, 0.08);
  --shadow-glow: 0 12px 35px rgba(22, 32, 45, 0.08);
}

[data-theme="light"] .card,
[data-theme="light"] .stat-card,
[data-theme="light"] .chart-card,
[data-theme="light"] .recent-questions-card {
  background: rgba(255,255,255,0.92);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

[data-theme="light"] .card h1,
[data-theme="light"] .card h2,
[data-theme="light"] .card h3,
[data-theme="light"] .stat-card h1,
[data-theme="light"] .stat-card h2,
[data-theme="light"] .stat-card h3 {
  color: var(--text);
}

[data-theme="light"] .admin-table th {
  color: #526176;
  background: var(--surface2);
}

[data-theme="light"] .admin-table td {
  color: var(--text);
  background: var(--surface);
}

[data-theme="light"] .admin-table tr:hover td {
  background: #eef6f6;
}

[data-theme="light"] .history-response td {
  background: #f6fafc !important;
  color: var(--text);
}

:root {
  --accent-hover: #6ee7de;
}

body {
  background-image:
    linear-gradient(180deg, rgba(255,255,255,0.7), rgba(255,255,255,0)),
    radial-gradient(ellipse at 15% 0%, rgba(11,127,134,0.08), transparent 36%),
    radial-gradient(ellipse at 85% 5%, rgba(181,121,24,0.06), transparent 30%);
}

[data-theme="dark"] body {
  background-image: radial-gradient(ellipse at 50% 0%, rgba(78, 205, 196, 0.03) 0%, transparent 60%);
}

header {
  min-height: 64px;
}

[data-theme="light"] header {
  background: rgba(255,255,255,0.92);
}

.header-inner {
  max-width: 1440px;
}

.logo {
  gap: 0.65rem;
  font-family: var(--font);
  letter-spacing: 0;
}

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #0b4450;
  color: #fff;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  filter: none;
  box-shadow: inset 0 -2px 0 rgba(255,255,255,0.16);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}

.logo-primary {
  font-weight: 700;
  color: var(--text);
}

.logo-secondary {
  margin-top: 0.1rem;
  font-size: 0.72rem;
  color: var(--text-dim);
  font-weight: 500;
}

.header-model {
  border-radius: 999px;
  background: var(--surface2);
}

main.has-sidebar .main-content-area {
  max-width: none;
  padding: 0;
}

main:not(.has-sidebar) {
  max-width: 1180px;
}

footer {
  display: none;
}

.assistant-shell {
  width: 100%;
}

.assistant-shell-with-sidebar {
  display: flex;
  min-height: calc(100vh - 64px);
}

.workspace-shell {
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  padding: 1.1rem 1.25rem 1.25rem;
  gap: 0.75rem;
}

.workspace-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.workspace-title-block {
  min-width: 260px;
}

.workspace-kicker {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.workspace-title-block h1 {
  font-size: 1.35rem;
  line-height: 1.2;
  letter-spacing: 0;
  color: var(--text);
}

.workspace-title-block p {
  margin-top: 0.35rem;
  max-width: 680px;
  color: var(--text-dim);
  font-size: 0.92rem;
}

.workspace-actions {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  margin-left: auto;
}

.workspace-status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255,255,255,0.7);
  color: var(--text-dim);
  font-size: 0.78rem;
}

.workspace-status-strip span {
  display: inline-flex;
  gap: 0.25rem;
  align-items: center;
  padding-right: 0.6rem;
  border-right: 1px solid var(--border);
}

.workspace-status-strip span:last-child {
  border-right: 0;
}

.workspace-status-strip strong {
  color: var(--text);
  font-weight: 600;
}

.sources-menu {
  position: relative;
}

.sources-menu > summary {
  list-style: none;
}

.sources-menu > summary::-webkit-details-marker {
  display: none;
}

.sources-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  width: min(640px, calc(100vw - 2rem));
  z-index: 80;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 45px rgba(22,32,45,0.18);
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.source-field label,
.sources-panel label {
  font-size: 0.76rem;
  font-family: var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.source-options {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding-top: 0.85rem;
  margin-top: 0.85rem;
  border-top: 1px solid var(--border);
}

.chat-control-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  padding-top: 0.6rem;
  position: relative;
}

.chat-control-menu {
  position: relative;
}

.chat-control-menu > summary {
  list-style: none;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.38rem 0.62rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface2);
  color: var(--text-dim);
  cursor: pointer;
  line-height: 1.1;
}

.chat-control-menu > summary::-webkit-details-marker {
  display: none;
}

.chat-control-menu[open] > summary {
  border-color: rgba(11,127,134,0.38);
  background: rgba(11,127,134,0.08);
  color: var(--text);
}

.control-label {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.chat-control-menu strong {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 700;
}

.control-popover {
  position: absolute;
  left: 0;
  bottom: calc(100% + 0.5rem);
  width: min(420px, calc(100vw - 2rem));
  max-height: 46vh;
  overflow: auto;
  z-index: 95;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 45px rgba(22,32,45,0.18);
}

.chat-control-menu:nth-last-child(-n+2) .control-popover {
  left: auto;
  right: 0;
}

.chat-control-wide .control-popover {
  width: min(520px, calc(100vw - 2rem));
}

.control-popover label {
  margin-bottom: 0.4rem;
}

.control-popover select {
  min-width: 0;
}

.control-popover .inline-status {
  display: block;
  margin-top: 0.55rem;
}

.control-checks {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.chat-container {
  flex: 1;
  height: auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.chat-messages {
  padding: 1rem clamp(0.85rem, 2vw, 1.5rem);
  background:
    linear-gradient(180deg, rgba(247,249,252,0.78), rgba(255,255,255,0.96));
}

[data-theme="dark"] .chat-messages {
  background: linear-gradient(180deg, rgba(19,26,36,0.72), rgba(10,14,20,0.92));
}

.chat-empty {
  height: 100%;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-style: normal;
  color: var(--text);
}

.chat-empty-inner {
  max-width: 620px;
  animation: none;
}

.chat-empty-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.45rem;
  font-weight: 700;
}

.chat-empty-title {
  color: var(--text);
  font-family: var(--font);
  font-size: 1.55rem;
  margin-bottom: 0.45rem;
  letter-spacing: 0;
}

.chat-empty-sub {
  color: #546377;
  font-size: 0.96rem;
  max-width: 560px;
  margin-bottom: 1rem;
}

.suggestion-chip,
.topic-btn {
  border-radius: 999px;
  background: var(--surface);
  border-color: var(--border);
  color: #334155;
}

.chat-input-form {
  background: var(--surface);
  padding: 0.75rem;
}

.chat-input-row {
  align-items: stretch;
}

.chat-input-row textarea {
  min-height: 50px;
  border-radius: 8px;
  background: var(--surface2);
}

.chat-input-row .btn,
.btn-attach {
  border-radius: 8px;
}

.btn-primary {
  background: #0b7f86;
  color: #fff;
  box-shadow: none;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-outline {
  border-color: var(--border);
  background: var(--surface);
}

.chat-user .chat-bubble {
  background: #0b7f86;
  color: #fff;
  border-bottom-right-radius: 3px;
}

.chat-assistant .chat-bubble {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  box-shadow: 0 1px 0 rgba(22,32,45,0.03);
}

.chat-label {
  color: var(--text-dim);
}

.chat-meta {
  flex-wrap: wrap;
}

.history-sidebar {
  top: 64px;
  height: calc(100vh - 64px);
  width: 304px;
  min-width: 304px;
  background: #ffffff;
  border-right: 1px solid var(--border);
}

[data-theme="dark"] .history-sidebar {
  background: var(--surface);
}

.sidebar-header {
  align-items: flex-start;
  justify-content: space-between;
  padding: 0.9rem 0.85rem 0.65rem;
}

.sidebar-title-block {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.sidebar-kicker,
.sidebar-section-label,
.sidebar-date-group {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 700;
}

.sidebar-title-block strong {
  font-size: 0.98rem;
  color: var(--text);
}

.sidebar-new-row {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: 0.45rem;
}

.sidebar-header .btn-new-chat,
.btn-new-chat {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.btn-clear-history {
  width: 100%;
  min-height: 34px;
  padding: 0.45rem 0.7rem;
  border-radius: 8px;
  border: 1px solid rgba(239,68,68,0.28);
  background: rgba(239,68,68,0.06);
  color: #b91c1c;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.btn-clear-history:hover {
  background: rgba(239,68,68,0.12);
  border-color: rgba(239,68,68,0.42);
}

[data-theme="dark"] .btn-clear-history {
  color: #fca5a5;
  background: rgba(248,113,113,0.08);
  border-color: rgba(248,113,113,0.24);
}

.sidebar-section-label {
  padding: 0.7rem 0.85rem 0.25rem;
}

.sidebar-date-group {
  padding: 0.75rem 0.85rem 0.25rem;
  color: var(--accent);
}

.sidebar-conv-item {
  align-items: flex-start;
  padding: 0.6rem 0.7rem;
  margin: 0.12rem 0.45rem;
  border-radius: 8px;
}

.sidebar-conv-main {
  display: flex;
  min-width: 0;
  flex: 1;
  flex-direction: column;
  gap: 0.18rem;
}

.sidebar-conv-title {
  font-size: 0.84rem;
  font-weight: 600;
}

.sidebar-conv-sub {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.68rem;
  color: var(--text-dim);
}

.project-mini-badge {
  display: inline-flex;
  align-items: center;
  height: 18px;
  padding: 0 0.35rem;
  border-radius: 999px;
  background: var(--surface3);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
}

.sidebar-conv-item.active {
  background: rgba(11,127,134,0.1);
  border-left-color: var(--accent);
}

.btn-open-sidebar {
  top: 64px;
  background: var(--surface);
}

.guest-banner {
  margin: 0;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(11,127,134,0.06);
}

@media (max-width: 980px) {
  .workspace-header {
    flex-direction: column;
  }
  .workspace-actions {
    width: 100%;
    margin-left: 0;
  }
  .sources-menu {
    flex: 1;
  }
  .sources-menu > summary {
    width: 100%;
  }
  .sources-grid {
    grid-template-columns: 1fr;
  }
  .workspace-status-strip span {
    border-right: 0;
  }
}

@media (max-width: 768px) {
  .workspace-shell {
    padding: 0.85rem;
  }
  .evidence-item {
    grid-template-columns: minmax(0, 1fr);
  }
  .evidence-main {
    flex-wrap: wrap;
  }
  .evidence-title {
    white-space: normal;
  }
  .evidence-badges {
    grid-column: 1;
    grid-row: auto;
    justify-content: flex-start;
  }
  .chat-control-bar {
    gap: 0.35rem;
  }
  .chat-control-menu {
    position: static;
  }
  .chat-control-menu > summary {
    width: 100%;
  }
  .chat-control-menu strong {
    max-width: 130px;
  }
  .control-popover,
  .chat-control-menu:nth-last-child(-n+2) .control-popover {
    left: 0.85rem;
    right: 0.85rem;
    width: auto;
  }
  .history-sidebar {
    top: 64px;
    height: calc(100vh - 64px);
  }
  .btn-open-sidebar {
    left: 0.7rem;
    top: 70px;
    width: auto;
    height: 32px;
    padding: 0 0.7rem;
    gap: 0.4rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    z-index: 101;
  }
  .sidebar-open-label {
    display: inline;
  }
  .sidebar-backdrop {
    top: 64px;
  }
  .chat-container {
    min-height: 72vh;
  }
  .chat-msg {
    max-width: 94%;
  }
}

/* ── V2 Workspace Refinement ───────────────────────────── */
[data-theme="light"] body {
  background:
    linear-gradient(180deg, #f7f9fc 0%, #eef3f8 100%);
}

[data-theme="dark"] body {
  background:
    linear-gradient(180deg, #111827 0%, #0a0e14 100%);
}

.assistant-shell-with-sidebar {
  background: transparent;
}

.workspace-shell {
  padding: 1rem clamp(1rem, 2vw, 1.75rem) 1.25rem;
}

.workspace-header {
  min-height: 68px;
  align-items: center;
  padding: 0.15rem 0.15rem 0.1rem;
}

.workspace-title-block h1 {
  font-size: clamp(1.2rem, 2vw, 1.65rem);
  font-weight: 750;
}

.workspace-title-block p {
  max-width: 760px;
}

.workspace-status-strip {
  border-radius: 10px;
  background: rgba(255,255,255,0.72);
  box-shadow: 0 1px 0 rgba(255,255,255,0.75) inset;
}

[data-theme="dark"] .workspace-status-strip {
  background: rgba(19,26,36,0.78);
  box-shadow: none;
}

.chat-container {
  border-radius: 12px;
  border-color: rgba(148,163,184,0.42);
  box-shadow: 0 18px 48px rgba(15,23,42,0.10);
}

[data-theme="dark"] .chat-container {
  border-color: rgba(71,85,105,0.65);
  box-shadow: 0 18px 48px rgba(0,0,0,0.28);
}

.chat-messages {
  gap: 1rem;
  padding: clamp(1rem, 2vw, 1.65rem);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,250,252,0.98));
}

[data-theme="dark"] .chat-messages {
  background:
    linear-gradient(180deg, rgba(17,24,39,0.96), rgba(10,14,20,0.98));
}

.chat-empty {
  min-height: 420px;
}

.chat-empty-inner {
  width: min(720px, 100%);
  padding: 1rem;
}

.chat-empty-title {
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 760;
}

.chat-empty-sub {
  max-width: 640px;
  color: var(--text-dim);
}

.suggestion-chip {
  min-height: 34px;
  padding: 0.42rem 0.8rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
  box-shadow: 0 1px 0 rgba(255,255,255,0.65) inset;
}

[data-theme="dark"] .suggestion-chip {
  background: rgba(30,41,59,0.72);
  box-shadow: none;
}

.chat-msg {
  max-width: min(860px, 88%);
}

.chat-assistant {
  width: min(860px, 88%);
}

.chat-bubble {
  border-radius: 14px;
  line-height: 1.68;
}

.chat-user .chat-bubble {
  background: #0b7f86;
  color: #fff;
  box-shadow: 0 10px 22px rgba(11,127,134,0.18);
}

.chat-assistant .chat-bubble {
  background: rgba(255,255,255,0.92);
  border-color: rgba(148,163,184,0.36);
  box-shadow: 0 6px 20px rgba(15,23,42,0.06);
}

[data-theme="dark"] .chat-assistant .chat-bubble {
  background: rgba(19,26,36,0.96);
  border-color: rgba(71,85,105,0.78);
}

.chat-input-form {
  padding: 0.85rem clamp(0.8rem, 1.5vw, 1.15rem) 0.9rem;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.94);
}

[data-theme="dark"] .chat-input-form {
  background: rgba(17,24,39,0.96);
}

.chat-input-row {
  min-height: 58px;
  gap: 0.55rem;
}

.chat-input-row textarea {
  min-height: 56px;
  max-height: 180px;
  padding: 0.85rem 0.95rem;
  border-radius: 12px;
  background: #f8fafc;
  border-color: rgba(148,163,184,0.48);
  resize: vertical;
}

[data-theme="dark"] .chat-input-row textarea {
  background: rgba(30,41,59,0.72);
}

.chat-input-row textarea:focus {
  border-color: rgba(11,127,134,0.64);
  box-shadow: 0 0 0 3px rgba(11,127,134,0.12);
}

.chat-input-row .btn-primary {
  min-width: 86px;
  border-radius: 12px;
  font-weight: 750;
}

.btn-attach {
  width: 42px;
  min-width: 42px;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 700;
}

.chat-control-bar {
  padding-top: 0.7rem;
}

.chat-control-menu > summary {
  min-height: 32px;
  border-radius: 999px;
  background: rgba(248,250,252,0.88);
}

[data-theme="dark"] .chat-control-menu > summary {
  background: rgba(30,41,59,0.7);
}

.thinking-row {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.65rem;
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 600;
}

.thinking-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
  animation: thinking-dot 1.05s ease-in-out infinite;
}

.thinking-dot:nth-child(2) { animation-delay: 0.15s; }
.thinking-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes thinking-dot {
  0%, 80%, 100% { opacity: 0.35; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-3px); }
}

.thinking-text {
  margin-left: 0.15rem;
}

.history-sidebar {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

[data-theme="dark"] .history-sidebar {
  background: rgba(17,24,39,0.94);
}

.sidebar-conv-item {
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.sidebar-conv-item:hover {
  transform: translateY(-1px);
  border-color: rgba(148,163,184,0.38);
}

.sidebar-conv-item.active {
  border-color: rgba(11,127,134,0.38);
  box-shadow: 0 8px 20px rgba(11,127,134,0.08);
}

.sidebar-conv-item.pending {
  border-color: rgba(11,127,134,0.3);
}

.sidebar-working {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  margin-top: 0.08rem;
}

.sidebar-working-spinner {
  width: 13px;
  height: 13px;
  border-radius: 999px;
  border: 2px solid rgba(11,127,134,0.18);
  border-top-color: var(--accent);
  animation: sidebar-working-spin 0.8s linear infinite;
}

@keyframes sidebar-working-spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
  .workspace-shell {
    padding: 0.75rem;
  }
  .workspace-status-strip {
    display: none;
  }
  .chat-msg,
  .chat-assistant {
    max-width: 96%;
    width: auto;
  }
  .chat-input-row {
    gap: 0.45rem;
  }
  .chat-input-row .btn-primary {
    min-width: 68px;
  }
}

/* ── V2 Clean Assistant Surface ────────────────────────── */
.assistant-shell-with-sidebar .workspace-shell {
  min-height: calc(100vh - 64px);
}

main.has-sidebar .main-content-area {
  max-width: none;
  padding: 0;
  display: flex;
}

.workspace-shell {
  width: 100%;
  max-width: min(1180px, calc(100vw - 2rem));
  margin: 0 auto;
  gap: 0.75rem;
}

.workspace-shell-empty {
  justify-content: center;
  padding-top: clamp(0.75rem, 2vh, 1.5rem);
  padding-bottom: clamp(0.75rem, 2vh, 1.5rem);
}

.workspace-shell-empty .guest-banner {
  width: min(900px, 100%);
  margin: 0 auto;
}

.workspace-shell-empty .chat-container-empty {
  flex: 1;
  min-height: calc(100vh - 96px);
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.workspace-shell-empty .chat-container-empty .chat-messages {
  flex: 1;
  min-height: clamp(260px, 44vh, 500px);
  overflow: visible;
  padding: 0 clamp(0.5rem, 2vw, 1rem);
  background: transparent;
}

.workspace-shell-empty .chat-empty {
  min-height: clamp(260px, 42vh, 480px);
}

.workspace-shell-empty .chat-empty-inner {
  width: min(760px, 100%);
  padding: 0 0.5rem;
}

.workspace-shell-empty .chat-empty-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}

.workspace-shell-empty .chat-empty-title {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
}

.workspace-shell-empty .chat-empty-sub {
  max-width: 660px;
  margin-inline: auto;
  font-size: 1rem;
}

.workspace-shell-empty .chat-input-form {
  width: min(880px, calc(100% - 1rem));
  margin: 0 auto;
  padding: 0.72rem;
  border: 1px solid rgba(148,163,184,0.42);
  border-radius: 24px;
  background: rgba(255,255,255,0.96);
  box-shadow: 0 22px 60px rgba(15,23,42,0.12);
}

[data-theme="dark"] .workspace-shell-empty .chat-input-form {
  background: rgba(17,24,39,0.96);
  border-color: rgba(71,85,105,0.78);
  box-shadow: 0 22px 60px rgba(0,0,0,0.3);
}

.workspace-shell-empty .chat-input-row textarea {
  min-height: 58px;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  resize: none;
}

.workspace-shell-empty .chat-input-row textarea:focus {
  border-color: transparent;
  box-shadow: none;
}

.chat-input-row textarea {
  resize: none;
}

.workspace-shell-empty .chat-input-row .btn-primary,
.workspace-shell-empty .btn-attach {
  border-radius: 18px;
}

.sidebar-danger-menu {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(248,250,252,0.72);
}

.sidebar-danger-menu > summary {
  list-style: none;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.65rem;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.74rem;
  font-weight: 700;
}

.sidebar-danger-menu > summary::-webkit-details-marker {
  display: none;
}

.sidebar-danger-menu[open] > summary {
  color: #b91c1c;
  border-bottom: 1px solid var(--border);
}

.sidebar-danger-menu .btn-clear-history {
  border: 0;
  border-radius: 0 0 8px 8px;
  background: transparent;
}

[data-theme="dark"] .sidebar-danger-menu {
  background: rgba(30,41,59,0.48);
}

.chat-settings-panel.chat-control-bar {
  display: block;
  padding-top: 0.55rem;
}

.chat-settings-panel > summary {
  list-style: none;
  width: fit-content;
  max-width: 100%;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.34rem 0.62rem;
  border: 1px solid rgba(148,163,184,0.42);
  border-radius: 999px;
  background: rgba(248,250,252,0.86);
  color: var(--text-dim);
  cursor: pointer;
  line-height: 1.15;
}

.chat-settings-panel > summary::-webkit-details-marker {
  display: none;
}

.chat-settings-panel > summary::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform 0.18s ease;
}

.chat-settings-panel[open] > summary::after {
  transform: rotate(225deg) translateY(-1px);
}

.chat-settings-panel > summary strong {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text);
  font-size: 0.75rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.settings-summary-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.chat-settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-top: 0.65rem;
  padding: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(248,250,252,0.78);
}

[data-theme="dark"] .chat-settings-panel > summary,
[data-theme="dark"] .chat-settings-grid {
  background: rgba(30,41,59,0.72);
}

.control-field {
  min-width: 0;
}

.control-field label {
  font-family: var(--mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.control-field select {
  width: 100%;
}

.settings-inline-value {
  display: block;
  margin-top: 0.25rem;
  color: var(--text-dim);
  font-size: 0.72rem;
}

.chat-settings-panel .workspace-status-strip {
  margin-top: 0.65rem;
  padding: 0.45rem 0.55rem;
  background: rgba(255,255,255,0.56);
  box-shadow: none;
  font-size: 0.72rem;
}

[data-theme="dark"] .chat-settings-panel .workspace-status-strip {
  background: rgba(15,23,42,0.42);
}

.chat-meta {
  min-height: 0;
}

.source-drawer-control {
  flex-basis: 100%;
  margin-top: 0.25rem;
}

.source-drawer-trigger {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.62rem;
  border: 1px solid rgba(11,127,134,0.28);
  border-radius: 999px;
  background: rgba(11,127,134,0.08);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
  cursor: pointer;
}

.source-drawer-trigger:hover {
  border-color: rgba(11,127,134,0.48);
  background: rgba(11,127,134,0.13);
}

.source-drawer-trigger strong {
  min-width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(11,127,134,0.14);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.66rem;
}

.source-trigger-icon {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 13px 0 0 rgba(11,127,134,0.45), 26px 0 0 rgba(11,127,134,0.24);
  margin-right: 22px;
}

.source-drawer-backdrop {
  position: fixed;
  inset: 64px 0 0 0;
  z-index: 980;
  background: rgba(15,23,42,0.22);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.source-drawer-backdrop.open {
  opacity: 1;
}

.source-drawer {
  position: fixed;
  top: 64px;
  right: 0;
  z-index: 981;
  width: min(470px, 100vw);
  height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  background: rgba(255,255,255,0.98);
  border-left: 1px solid var(--border);
  box-shadow: -20px 0 48px rgba(15,23,42,0.16);
  transform: translateX(100%);
  transition: transform 0.22s ease;
}

.source-drawer.open {
  transform: translateX(0);
}

[data-theme="dark"] .source-drawer {
  background: rgba(17,24,39,0.98);
  box-shadow: -20px 0 48px rgba(0,0,0,0.34);
}

.source-drawer-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

.source-drawer-header span {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.source-drawer-header h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.25;
}

.source-drawer-close {
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
}

.source-drawer-close:hover {
  color: var(--text);
  border-color: rgba(11,127,134,0.36);
}

.source-drawer-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.85rem 1rem 1rem;
}

.source-drawer-intro {
  margin: 0;
  padding: 0.85rem 1rem 0;
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.45;
}

.source-drawer-card {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 0.7rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}

.source-drawer-card-partial {
  opacity: 0.72;
  padding: 0.68rem 0;
}

.source-drawer-card:last-child {
  border-bottom: 0;
}

.source-drawer-card-index {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(11,127,134,0.1);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 800;
}

.source-drawer-card-body {
  min-width: 0;
}

.source-drawer-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.35rem;
}

.source-badge-row {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0.3rem;
  flex-shrink: 0;
}

.source-rank-badge {
  flex-shrink: 0;
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 750;
  line-height: 1.3;
}

.source-rank-main {
  border-color: rgba(75, 199, 185, 0.36);
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.source-rank-partial {
  border-color: var(--border);
  background: rgba(128, 128, 128, 0.08);
  color: var(--text-dim);
}

.source-drawer-card h4 {
  margin: 0;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.28;
}

.source-drawer-card-partial h4 {
  font-size: 0.82rem;
}

.source-drawer-card p {
  margin: 0 0 0.55rem;
  color: var(--text-dim);
  font-size: 0.78rem;
  line-height: 1.42;
}

.source-drawer-card-partial p {
  font-size: 0.72rem;
}

.source-drawer-card .evidence-links {
  gap: 0.35rem;
}

@media (max-width: 768px) {
  .workspace-shell-empty .chat-container-empty {
    min-height: calc(100vh - 82px);
  }

  .workspace-shell-empty .chat-empty {
    min-height: 240px;
  }

  .workspace-shell-empty .chat-input-form {
    width: 100%;
    border-radius: 18px;
  }

  .chat-settings-panel > summary {
    width: 100%;
  }

  .chat-settings-panel > summary strong {
    max-width: 62%;
  }

  .chat-settings-grid {
    grid-template-columns: 1fr;
  }

  .chat-settings-panel .workspace-status-strip {
    display: flex;
  }

  .source-drawer-backdrop {
    inset: 0;
  }

  .source-drawer {
    top: 0;
    width: 100vw;
    height: 100vh;
  }
}

/* ── V2 Admin Workspace ────────────────────────────────── */
.admin-v2-shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.admin-v2-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.admin-v2-header h2 {
  font-size: 1.65rem;
  line-height: 1.2;
}

.admin-v2-tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.3rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
}

.admin-v2-tab {
  min-height: 36px;
  border: 0;
  border-radius: 9px;
  padding: 0.45rem 0.85rem;
  background: transparent;
  color: var(--text-dim);
  font-weight: 750;
  cursor: pointer;
  white-space: nowrap;
}

.admin-v2-tab.active {
  background: rgba(11,127,134,0.12);
  color: var(--accent);
}

.admin-v2-panel {
  display: none;
  flex-direction: column;
  gap: 1rem;
}

.admin-v2-panel.active {
  display: flex;
}

.admin-v2-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.8fr);
  gap: 1rem;
}

.admin-v2-card {
  border-radius: 10px;
}

.admin-v2-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.admin-v2-card-head h3 {
  margin: 0;
  font-size: 0.98rem;
}

.admin-v2-table-scroll {
  overflow-x: auto;
}

.admin-dev-note {
  margin-top: -0.35rem;
}

.admin-question-log {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.admin-question-row {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(190px, 240px) minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.admin-question-row:hover:not(.disabled) {
  transform: translateY(-1px);
  border-color: rgba(11,127,134,0.42);
  background: rgba(11,127,134,0.04);
}

.admin-question-row.disabled {
  opacity: 0.62;
  cursor: not-allowed;
}

.admin-question-row.compact {
  grid-template-columns: minmax(150px, 190px) minmax(0, 1fr);
  padding: 0.6rem;
}

.admin-question-meta {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  font-size: 0.76rem;
  color: var(--text-dim);
}

.admin-question-meta strong {
  color: var(--accent);
  font-size: 0.82rem;
}

.admin-question-meta time {
  font-family: var(--mono);
  font-size: 0.7rem;
}

.admin-question-text {
  line-height: 1.45;
  font-size: 0.9rem;
}

.admin-user-list {
  display: grid;
  gap: 0.75rem;
}

.admin-user-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  overflow: hidden;
}

.admin-user-card summary {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.9rem;
  cursor: pointer;
  list-style: none;
}

.admin-user-card summary::-webkit-details-marker {
  display: none;
}

.admin-user-card summary strong {
  display: block;
  color: var(--text);
}

.admin-user-card summary small {
  display: block;
  color: var(--text-dim);
  font-size: 0.76rem;
}

.admin-user-profile-link {
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.admin-user-profile-link:hover strong {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.admin-user-card[open] summary {
  border-bottom: 1px solid var(--border);
  background: rgba(11,127,134,0.05);
}

.admin-user-metrics {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 0.76rem;
}

.admin-user-metrics span {
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface2);
}

.admin-user-detail {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 1rem;
  padding: 0.9rem;
}

.admin-user-actions {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  color: var(--text-dim);
  font-size: 0.82rem;
}

.admin-inline-form {
  margin: 0.4rem 0 0;
}

.admin-user-management {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  min-width: 0;
}

.admin-user-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(240px, 1fr));
  gap: 0.75rem;
}

.admin-control-form {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
  margin: 0;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface2);
}

.admin-control-form label,
.admin-filter-row label,
.admin-notes-label {
  color: var(--text-dim);
  font-size: 0.76rem;
  font-weight: 700;
}

.admin-form-row,
.admin-filter-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.admin-form-row input,
.admin-form-row select,
.admin-filter-row input,
.admin-filter-row select,
.admin-notes-label textarea {
  min-height: 34px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  padding: 0.35rem 0.5rem;
  font: inherit;
  font-size: 0.82rem;
}

.admin-form-row input[type="number"] {
  width: 7rem;
}

.admin-form-row input[type="password"] {
  width: min(100%, 12rem);
}

.admin-filter-row {
  margin: 0 0 0.9rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface2);
}

.admin-filter-row label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.admin-filter-search {
  flex: 1 1 260px;
}

.admin-filter-search input {
  width: 100%;
}

.admin-notes-label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

.admin-notes-label textarea {
  width: 100%;
  resize: vertical;
}

.provider-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0.16rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
  background: var(--surface2);
  color: var(--text-dim);
}

.provider-openai {
  background: rgba(11,127,134,0.12);
  color: var(--accent);
}

.provider-xai {
  background: rgba(124,58,237,0.12);
  color: #6d28d9;
}

.provider-anthropic {
  background: rgba(202,138,4,0.14);
  color: #a16207;
}

.btn-ghost {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--surface);
}

.admin-user-questions {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

/* ── Admin user profile ────────────────────────────────── */
.admin-user-profile-page {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.admin-user-profile-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.admin-user-profile-header h2 {
  margin: 0.2rem 0 0.35rem;
}

.admin-user-profile-header p {
  margin: 0;
}

.admin-back-link {
  display: inline-block;
  margin-bottom: 0.8rem;
  color: var(--text-dim);
  font-size: 0.82rem;
  text-decoration: none;
}

.admin-back-link:hover {
  color: var(--accent);
}

.admin-user-profile-badges {
  display: flex;
  justify-content: flex-end;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.admin-user-profile-stats {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: 0;
}

.admin-user-profile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.admin-user-profile-card {
  margin: 0;
  min-width: 0;
  padding: 1rem;
}

.admin-user-section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.admin-user-section-heading h3 {
  margin: 0.15rem 0 0;
}

.admin-user-record-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 9px;
  overflow: hidden;
}

.admin-user-record-list > div {
  min-width: 0;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.admin-user-record-list > div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.admin-user-record-list dt {
  margin-bottom: 0.16rem;
  color: var(--text-dim);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.admin-user-record-list dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 0.86rem;
}

.admin-security-note {
  margin: 0.75rem 0 0;
  color: var(--text-dim);
  font-size: 0.74rem;
}

.admin-user-subheading {
  margin: 1rem 0 0.55rem;
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.admin-user-audit-list,
.admin-instrument-profile-list,
.admin-user-feedback-list {
  display: grid;
  gap: 0.55rem;
}

.admin-user-audit-item,
.admin-instrument-profile-item,
.admin-user-feedback-item {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface2);
  overflow-wrap: anywhere;
}

.admin-user-audit-item span,
.admin-instrument-profile-item span,
.admin-user-feedback-item small,
.admin-user-audit-item small,
.admin-instrument-profile-item small {
  color: var(--text-dim);
  font-size: 0.75rem;
}

.admin-user-audit-item small {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-user-management-card .admin-user-form-grid {
  grid-template-columns: repeat(4, minmax(210px, 1fr));
}

.admin-user-table-wrap {
  overflow-x: auto;
}

.admin-user-detail-table {
  width: 100%;
  min-width: 820px;
}

.admin-user-detail-table td,
.admin-user-detail-table th {
  vertical-align: top;
}

.admin-record-id {
  display: block;
  margin-top: 0.2rem;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.admin-user-pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.6rem;
  margin-top: 0.8rem;
  color: var(--text-dim);
  font-size: 0.78rem;
}

.admin-user-feedback-item > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.admin-user-feedback-item time {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.admin-user-feedback-item p {
  margin: 0.25rem 0;
}

@media (max-width: 900px) {
  .admin-v2-grid,
  .admin-user-detail,
  .admin-user-profile-grid {
    grid-template-columns: 1fr;
  }
  .admin-user-profile-header {
    align-items: flex-start;
    flex-direction: column;
  }
  .admin-user-profile-badges {
    justify-content: flex-start;
  }
  .admin-user-profile-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .admin-user-form-grid {
    grid-template-columns: 1fr;
  }
  .admin-user-management-card .admin-user-form-grid {
    grid-template-columns: 1fr;
  }
  .admin-question-row,
  .admin-question-row.compact {
    grid-template-columns: 1fr;
  }
  .admin-user-card summary {
    align-items: flex-start;
    flex-direction: column;
  }
  .admin-user-metrics {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  .admin-user-profile-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .admin-user-record-list {
    grid-template-columns: 1fr;
  }
  .admin-user-record-list > div:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--border);
  }
  .admin-user-record-list > div:last-child {
    border-bottom: 0;
  }
  .admin-user-section-heading {
    flex-direction: column;
  }
}

/* ── V2 Visual System Overhaul: modern technical dark UI ─────── */
:root,
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #11100f;
  --surface: #191817;
  --surface2: #22201d;
  --surface3: #2b2925;
  --surface-soft: rgba(255, 255, 255, 0.045);
  --border: #38352f;
  --border-hl: #585145;
  --text: #f0eee8;
  --text-dim: #aaa39a;
  --text-muted: #7e766c;
  --accent: #4bc7b9;
  --accent-hover: #6ee7d8;
  --accent-soft: rgba(75, 199, 185, 0.14);
  --accent2: #d3a14f;
  --accent2-soft: rgba(211, 161, 79, 0.14);
  --accent3: #8fb3ff;
  --danger: #f87171;
  --danger-bg: rgba(248, 113, 113, 0.12);
  --shadow-sm: 0 12px 34px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 26px 70px rgba(0, 0, 0, 0.34);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f2f0ea;
  --surface: #fffdfa;
  --surface2: #ebe7df;
  --surface3: #ded8cc;
  --surface-soft: rgba(17, 16, 15, 0.045);
  --border: #d8d1c4;
  --border-hl: #bcb1a0;
  --text: #1e211f;
  --text-dim: #6f685f;
  --text-muted: #90877a;
  --accent: #087f7b;
  --accent-hover: #0a6e70;
  --accent-soft: rgba(8, 127, 123, 0.12);
  --accent2: #b87a17;
  --accent2-soft: rgba(184, 122, 23, 0.12);
  --accent3: #4f6faa;
  --shadow-sm: 0 10px 26px rgba(53, 45, 34, 0.08);
  --shadow-md: 0 22px 60px rgba(53, 45, 34, 0.14);
}

body {
  background-color: var(--bg);
  background-image: linear-gradient(180deg, #151412 0%, #11100f 46%, #0d0c0b 100%);
  color: var(--text);
}

[data-theme="dark"] body {
  background-color: var(--bg);
  background-image: linear-gradient(180deg, #151412 0%, #11100f 46%, #0d0c0b 100%);
}

[data-theme="light"] body {
  background-image: linear-gradient(180deg, #f7f5ef 0%, #f2f0ea 48%, #e9e4da 100%);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

header {
  background: rgba(17, 16, 15, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

[data-theme="light"] header {
  background: rgba(255, 253, 250, 0.9);
  border-bottom-color: rgba(90, 78, 62, 0.16);
}

.header-inner {
  max-width: none;
  padding-inline: clamp(0.75rem, 1.6vw, 1.35rem);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(75, 199, 185, 0.35);
  border-radius: 8px;
  background: linear-gradient(180deg, #0f4d52, #0b3739);
  box-shadow: none;
}

.logo-primary {
  letter-spacing: -0.01em;
}

.logo-secondary,
.header-model,
.nav-user,
.rate-indicator {
  color: var(--text-dim);
}

.header-model {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text-dim);
}

nav[role="navigation"] {
  gap: 0.25rem;
}

.nav-link {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  border-radius: 8px;
  color: var(--text-dim);
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.nav-link:hover {
  background: var(--surface-soft);
  color: var(--text);
}

.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.theme-toggle-btn,
.hamburger,
.btn-open-sidebar,
.btn-collapse-sidebar,
.source-drawer-close,
.btn-copy-bubble,
.btn-export,
.code-copy-btn,
.btn-thumb,
.sidebar-conv-actions button {
  width: 36px;
  height: 36px;
  min-width: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: none;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
}

.theme-toggle-btn:hover,
.hamburger:hover,
.btn-open-sidebar:hover,
.btn-collapse-sidebar:hover,
.source-drawer-close:hover,
.btn-copy-bubble:hover,
.btn-export:hover,
.code-copy-btn:hover,
.btn-thumb:hover,
.sidebar-conv-actions button:hover {
  transform: translateY(-1px);
  border-color: var(--border-hl);
  background: var(--surface3);
  color: var(--text);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
}

.hamburger-bar {
  background: currentColor;
}

.assistant-shell-with-sidebar .btn-open-sidebar {
  display: none;
}

.history-sidebar.collapsed ~ .btn-open-sidebar {
  display: inline-flex;
}

.assistant-shell-with-sidebar,
main.has-sidebar {
  background: transparent;
}

.main-content-area {
  background: transparent;
}

.history-sidebar {
  background: rgba(19, 18, 16, 0.96);
  border-right: 1px solid var(--border);
  box-shadow: none;
}

[data-theme="dark"] .history-sidebar {
  background: rgba(19, 18, 16, 0.96);
}

[data-theme="light"] .history-sidebar {
  background: rgba(255, 253, 250, 0.92);
}

.sidebar-header,
.sidebar-new-row {
  border-color: var(--border);
}

.sidebar-kicker,
.sidebar-section-label,
.sidebar-date-group,
.chat-empty-eyebrow,
.workspace-kicker,
.settings-summary-label,
.source-drawer-header span {
  letter-spacing: 0.08em;
  color: var(--accent);
}

.btn-new-chat {
  min-height: 38px;
  border-color: rgba(75, 199, 185, 0.38);
  background: var(--accent-soft);
  color: var(--text);
  box-shadow: none;
}

.btn-new-chat:hover {
  border-color: var(--accent);
  background: rgba(75, 199, 185, 0.2);
  color: var(--accent-hover);
}

.sidebar-danger-menu > summary {
  border-radius: 8px;
  color: var(--text-muted);
}

.sidebar-search input,
.admin-form-row input,
.admin-form-row select,
.admin-filter-row input,
.admin-filter-row select,
.admin-notes-label textarea,
.control-field select,
.chat-hint-select {
  border-color: var(--border);
  background: var(--surface2);
  color: var(--text);
}

.sidebar-search input:focus,
.chat-input-row textarea:focus,
.admin-form-row input:focus,
.admin-form-row select:focus,
.admin-filter-row input:focus,
.admin-filter-row select:focus,
.admin-notes-label textarea:focus,
.control-field select:focus {
  border-color: rgba(75, 199, 185, 0.62);
  box-shadow: 0 0 0 3px rgba(75, 199, 185, 0.12);
  outline: none;
}

.sidebar-convos {
  padding-inline: 0.55rem;
}

.sidebar-conv-item {
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
}

.sidebar-conv-item:hover {
  transform: none;
  border-color: var(--border);
  background: var(--surface-soft);
}

.sidebar-conv-item.active {
  border-color: rgba(75, 199, 185, 0.34);
  background: var(--accent-soft);
  box-shadow: none;
}

.sidebar-conv-title {
  color: var(--text);
  letter-spacing: 0;
}

.project-mini-badge {
  background: var(--surface3);
  color: var(--text-dim);
}

.workspace-shell {
  padding: clamp(0.8rem, 1.6vw, 1.2rem);
}

.workspace-shell-empty {
  justify-content: center;
}

.chat-container {
  border-color: var(--border);
  background: rgba(25, 24, 23, 0.72);
  box-shadow: none;
}

[data-theme="light"] .chat-container {
  background: rgba(255, 253, 250, 0.82);
}

.workspace-shell-empty .chat-container-empty {
  background: transparent;
  border-color: transparent;
}

.chat-messages,
[data-theme="dark"] .chat-messages {
  background: transparent;
}

.chat-empty {
  color: var(--text);
}

.chat-empty-inner {
  max-width: 700px;
}

.chat-empty-title {
  color: var(--text);
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.chat-empty-sub {
  max-width: 680px;
  color: var(--text-dim);
  font-size: clamp(0.98rem, 1.4vw, 1.15rem);
}

.chat-empty-suggestions {
  gap: 0.55rem;
}

.suggestion-chip,
.topic-btn {
  min-height: 36px;
  border-radius: 8px;
  border-color: var(--border);
  background: var(--surface-soft);
  color: var(--text-dim);
}

.suggestion-chip:hover,
.topic-btn:hover {
  border-color: var(--border-hl);
  background: var(--surface3);
  color: var(--text);
  transform: translateY(-1px);
}

.chat-input-form {
  border-top: 1px solid var(--border);
  background: rgba(20, 19, 17, 0.92);
  box-shadow: none;
}

[data-theme="dark"] .chat-input-form {
  background: rgba(20, 19, 17, 0.92);
}

[data-theme="light"] .chat-input-form {
  background: rgba(255, 253, 250, 0.92);
}

.workspace-shell-empty .chat-input-form {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(25, 24, 23, 0.9);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .workspace-shell-empty .chat-input-form {
  background: rgba(25, 24, 23, 0.9);
  border-color: var(--border);
}

[data-theme="light"] .workspace-shell-empty .chat-input-form {
  background: rgba(255, 253, 250, 0.94);
}

.chat-input-row {
  gap: 0.5rem;
}

.chat-input-row textarea {
  border-color: transparent;
  background: transparent;
  color: var(--text);
  caret-color: var(--accent);
}

[data-theme="dark"] .chat-input-row textarea {
  background: transparent;
}

.chat-input-row textarea::placeholder {
  color: var(--text-muted);
}

.workspace-shell-empty .chat-input-row textarea {
  background: transparent;
}

.btn-attach,
.chat-input-row .btn-primary {
  width: 44px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border-radius: 8px;
  font-size: 1.12rem;
}

.btn-attach {
  border-color: var(--border);
  background: var(--surface-soft);
  color: var(--text-dim);
}

.btn-attach:hover {
  border-color: var(--border-hl);
  background: var(--surface3);
  color: var(--text);
}

.chat-input-row .btn-primary,
#chat-send-btn {
  border: 1px solid rgba(75, 199, 185, 0.32);
  background: var(--accent);
  color: #061312;
  font-weight: 800;
}

.chat-input-row .btn-primary:hover,
#chat-send-btn:hover {
  background: var(--accent-hover);
  color: #061312;
  box-shadow: none;
}

.chat-settings-panel > summary {
  border-radius: 8px;
  border-color: var(--border);
  background: var(--surface-soft);
  color: var(--text-dim);
}

.chat-settings-panel > summary:hover,
.chat-settings-panel[open] > summary {
  border-color: var(--border-hl);
  background: var(--surface2);
  color: var(--text);
}

.chat-settings-grid,
[data-theme="dark"] .chat-settings-grid,
.chat-settings-panel .workspace-status-strip,
[data-theme="dark"] .chat-settings-panel .workspace-status-strip {
  border-radius: 8px;
  border-color: var(--border);
  background: var(--surface-soft);
}

.workspace-status-strip span {
  border-color: var(--border);
}

.chat-msg {
  max-width: min(980px, 100%);
}

/* Assistant answers use the available reading width.  User prompts remain
   compact and right-aligned through their separate .chat-user rules. */
.chat-assistant {
  width: min(980px, 100%);
  max-width: 100%;
}

.chat-bubble-wrap,
.chat-assistant .chat-bubble {
  width: 100%;
  min-width: 0;
}

.chat-bubble {
  word-break: normal;
  overflow-wrap: anywhere;
}

.chat-label {
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.chat-user {
  margin-left: auto;
}

.chat-user .chat-bubble {
  border: 1px solid rgba(75, 199, 185, 0.22);
  border-radius: 12px 12px 4px 12px;
  background: #0d8079;
  color: #f7fffd;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.16);
}

.chat-assistant .chat-bubble {
  border: 1px solid var(--border);
  border-radius: 12px 12px 12px 4px;
  background: rgba(30, 29, 27, 0.88);
  color: var(--text);
  box-shadow: none;
}

[data-theme="light"] .chat-assistant .chat-bubble {
  background: rgba(255, 253, 250, 0.98);
}

.chat-assistant .chat-bubble a {
  color: var(--accent-hover);
}

[data-theme="light"] .chat-assistant .chat-bubble a {
  color: var(--accent);
}

/* Standard answer-table contract.  Headers and identifier cells never break
   letter-by-letter; a wide table scrolls inside the answer instead of being
   cropped or forcing the whole workspace wider. */
.answer-table-scroll {
  width: 100%;
  max-width: 100%;
  margin: 0.7rem 0 1rem;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface-soft);
  scrollbar-gutter: stable;
}

.answer-table {
  width: max-content;
  min-width: 100%;
  margin: 0;
  border-collapse: separate;
  border-spacing: 0;
  table-layout: auto;
  font-size: 0.84rem;
  line-height: 1.42;
}

.answer-table th,
.answer-table td {
  padding: 0.52rem 0.65rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  word-break: normal;
  overflow-wrap: normal;
}

.answer-table th:last-child,
.answer-table td:last-child {
  border-right: 0;
}

.answer-table tbody tr:last-child td {
  border-bottom: 0;
}

.answer-table th {
  white-space: nowrap;
  color: var(--text);
  background: var(--surface2);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.015em;
}

.answer-table td {
  min-width: 6rem;
  max-width: 34rem;
  white-space: normal;
}

.answer-table th:first-child,
.answer-table td:first-child {
  min-width: 7.5rem;
  white-space: nowrap;
}

.answer-table-scroll:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

[data-theme="light"] .answer-table-scroll {
  background: rgba(255, 253, 250, 0.96);
}

@media (max-width: 768px) {
  .answer-table {
    min-width: 620px;
    font-size: 0.8rem;
  }

  .answer-table th,
  .answer-table td {
    padding: 0.46rem 0.55rem;
  }
}

.chat-bubble pre {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0b0a09;
}

[data-theme="light"] .chat-bubble pre {
  background: #f4efe7;
}

.thinking-row {
  color: var(--text-dim);
}

.thinking-dot {
  background: var(--accent);
}

.skeleton-line {
  background: linear-gradient(90deg, rgba(255,255,255,0.05), rgba(255,255,255,0.1), rgba(255,255,255,0.05));
}

[data-theme="light"] .skeleton-line {
  background: linear-gradient(90deg, rgba(31,33,31,0.06), rgba(31,33,31,0.12), rgba(31,33,31,0.06));
}

.btn-copy-bubble,
.btn-export {
  position: absolute;
  top: 0.45rem;
  opacity: 0;
}

.btn-copy-bubble {
  right: 0.45rem;
}

.btn-export {
  right: 2.75rem;
}

.chat-bubble-wrap:hover .btn-copy-bubble,
.chat-bubble-wrap:hover .btn-export,
.btn-copy-bubble:focus,
.btn-export:focus {
  opacity: 1;
}

.btn-copy-bubble.copied,
.code-copy-btn.copied {
  border-color: rgba(75, 199, 185, 0.55);
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.chat-meta {
  gap: 0.4rem;
  margin-top: 0.45rem;
}

.source-drawer-trigger {
  min-height: 34px;
  border-radius: 8px;
  border-color: rgba(75, 199, 185, 0.3);
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.source-drawer-trigger:hover {
  border-color: rgba(75, 199, 185, 0.58);
  background: rgba(75, 199, 185, 0.2);
  transform: translateY(-1px);
}

.source-drawer-trigger strong {
  background: rgba(75, 199, 185, 0.18);
  color: var(--accent-hover);
}

.source-trigger-icon {
  width: 8px;
  height: 8px;
  box-shadow: 12px 0 0 rgba(211, 161, 79, 0.9), 24px 0 0 rgba(143, 179, 255, 0.78);
}

.source-drawer-backdrop {
  background: rgba(0, 0, 0, 0.44);
}

.source-drawer {
  width: min(500px, 100vw);
  border-left: 1px solid var(--border);
  background: rgba(24, 23, 21, 0.98);
  box-shadow: -30px 0 70px rgba(0, 0, 0, 0.36);
}

[data-theme="dark"] .source-drawer {
  background: rgba(24, 23, 21, 0.98);
  box-shadow: -30px 0 70px rgba(0, 0, 0, 0.36);
}

[data-theme="light"] .source-drawer {
  background: rgba(255, 253, 250, 0.98);
}

.source-drawer-header {
  border-color: var(--border);
}

.source-drawer-card {
  border-color: var(--border);
}

.source-drawer-card-index {
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.evidence-type,
.provider-badge,
.admin-user-metrics span {
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text-dim);
}

.evidence-link {
  border-radius: 8px;
  border-color: var(--border);
  background: var(--surface-soft);
  color: var(--text);
}

.evidence-link:hover {
  border-color: var(--border-hl);
  background: var(--surface3);
}

.evidence-download-link {
  border-color: rgba(75, 199, 185, 0.36);
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.evidence-post-link {
  border-color: rgba(211, 161, 79, 0.34);
  background: var(--accent2-soft);
  color: #f2c983;
}

[data-theme="light"] .evidence-post-link {
  color: #915f13;
}

.quick-rating {
  margin-top: 0.35rem;
  gap: 0.25rem;
}

.btn-thumb {
  width: 30px;
  height: 30px;
  min-width: 30px;
  font-size: 0.88rem;
}

.btn-thumb.voted {
  border-color: rgba(75, 199, 185, 0.55);
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.btn-thumb.voted-down {
  border-color: rgba(248, 113, 113, 0.45);
  background: var(--danger-bg);
  color: var(--danger);
}

.feedback-wrapper {
  margin-top: 0.35rem;
}

.feedback-wrapper details > summary,
.feedback-toggle {
  border-radius: 8px;
}

.admin-v2-shell,
.admin-card,
.stat-card,
.admin-user-card,
.admin-control-form,
.admin-filter-row {
  border-color: var(--border);
  background: rgba(25, 24, 23, 0.78);
}

[data-theme="light"] .admin-v2-shell,
[data-theme="light"] .admin-card,
[data-theme="light"] .stat-card,
[data-theme="light"] .admin-user-card,
[data-theme="light"] .admin-control-form,
[data-theme="light"] .admin-filter-row {
  background: rgba(255, 253, 250, 0.84);
}

.admin-v2-tabs {
  border-radius: 8px;
  border-color: var(--border);
  background: var(--surface-soft);
}

.admin-v2-tab {
  border-radius: 7px;
  color: var(--text-dim);
}

.admin-v2-tab.active {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

@media (max-width: 768px) {
  .hamburger {
    display: inline-flex;
  }

  .history-sidebar.collapsed ~ .btn-open-sidebar,
  .btn-open-sidebar {
    display: none !important;
  }

  .chat-empty-title {
    font-size: 2rem;
  }

  .workspace-shell {
    padding: 0.65rem;
  }

  .workspace-shell-empty .chat-input-form {
    border-radius: 12px;
  }

  .btn-attach,
  .chat-input-row .btn-primary {
    width: 40px;
    min-width: 40px;
    min-height: 40px;
  }

  .source-drawer {
    width: 100vw;
  }
}

/* ── Instrument profiles ───────────────────────────────── */
.instrument-settings-card {
  margin-bottom: 1.5rem;
  scroll-margin-top: 5.5rem;
}

.instrument-section-head,
.spectrometer-builder-head,
.instrument-profile-card,
.instrument-general-mode {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.instrument-section-head h3,
.spectrometer-builder-head h4 {
  margin: 0.15rem 0 0.45rem;
}

.instrument-section-head p,
.instrument-general-mode p,
.spectrometer-builder-head p {
  margin: 0;
  max-width: 760px;
  line-height: 1.55;
}

.instrument-eyebrow,
.instrument-rollout-kicker {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.instrument-general-mode {
  align-items: center;
  margin-top: 1.2rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
}

.instrument-general-mode.active {
  border-color: rgba(75, 199, 185, 0.42);
  background: var(--accent-soft);
}

.instrument-general-mode p {
  margin-top: 0.2rem;
  font-size: 0.82rem;
}

.instrument-active-mark {
  color: var(--accent-hover);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.instrument-profile-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.85rem;
}

.instrument-profile-card {
  align-items: center;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
}

.instrument-profile-card.active {
  border-color: rgba(75, 199, 185, 0.42);
}

.instrument-profile-title-row,
.instrument-profile-actions,
.instrument-form-actions,
.instrument-rollout-actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.instrument-profile-title-row h4,
.instrument-profile-summary p {
  margin: 0;
}

.instrument-profile-summary p {
  margin-top: 0.28rem;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.instrument-profile-meta {
  display: inline-block;
  margin-top: 0.4rem;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.instrument-profile-actions form,
.instrument-general-mode form,
.instrument-rollout-actions form,
.instrument-rollout-close {
  margin: 0;
}

.btn-quiet {
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
}

.btn-quiet:hover {
  border-color: var(--border);
  background: var(--surface-soft);
  color: var(--text);
}

.instrument-empty-state {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.85rem;
  padding: 1rem;
  border: 1px dashed var(--border);
  border-radius: 10px;
  text-align: center;
}

.instrument-profile-builder {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
  overflow: hidden;
}

.instrument-profile-builder > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

.instrument-profile-builder[open] > summary {
  border-bottom: 1px solid var(--border);
}

.instrument-summary-hint {
  color: var(--text-dim);
  font-size: 0.78rem;
  font-weight: 400;
}

.instrument-form {
  display: grid;
  gap: 1.25rem;
  padding: 1rem;
}

.instrument-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1rem;
}

.instrument-field-wide {
  grid-column: 1 / -1;
}

.instrument-field label,
.spectrometer-count-control label {
  color: var(--text);
  font-weight: 600;
}

.field-help {
  display: block;
  margin-top: 0.3rem;
  color: var(--text-dim);
  font-size: 0.75rem;
  line-height: 1.4;
}

.model-source-suggestion {
  color: var(--accent-hover);
}

.link-button {
  appearance: none;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 700;
  text-decoration: underline;
  cursor: pointer;
}

.spectrometer-builder {
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.spectrometer-count-control {
  display: grid;
  grid-template-columns: 58px auto;
  align-items: end;
  gap: 0.45rem;
  flex: 0 0 auto;
}

.spectrometer-count-control label {
  grid-column: 1 / -1;
  margin: 0;
}

.spectrometer-count-control input {
  width: 58px;
}

.spectrometer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: 0.75rem;
  margin-top: 0.9rem;
}

.spectrometer-card {
  min-width: 0;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
}

.spectrometer-card-head {
  display: grid;
  grid-template-columns: auto minmax(90px, 1fr);
  align-items: center;
  gap: 0.6rem;
}

.spectrometer-card-head label {
  margin: 0;
  color: var(--text);
  font-weight: 700;
}

.spectrometer-card-head input {
  padding: 0.4rem 0.55rem;
}

.crystal-chip-list {
  display: flex;
  align-items: center;
  align-content: flex-start;
  flex-wrap: wrap;
  gap: 0.35rem;
  min-height: 42px;
  margin: 0.75rem 0;
}

.crystal-chip {
  padding: 0.3rem 0.48rem;
  border: 1px solid rgba(75, 199, 185, 0.34);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  font-family: var(--mono);
  font-size: 0.72rem;
  cursor: pointer;
}

.crystal-chip:hover,
.crystal-chip:focus-visible {
  border-color: rgba(248, 113, 113, 0.55);
  color: var(--danger);
}

.crystal-empty {
  font-size: 0.76rem;
}

.crystal-add-row,
.crystal-custom-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.4rem;
  margin-top: 0.42rem;
}

.crystal-add-row select,
.crystal-custom-row input {
  min-width: 0;
  padding: 0.45rem 0.55rem;
}

.instrument-default-check {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  width: fit-content;
  margin: 0;
  color: var(--text);
  cursor: pointer;
}

.instrument-default-check input {
  margin-top: 0.2rem;
  accent-color: var(--accent);
}

.instrument-default-check span {
  display: grid;
  gap: 0.15rem;
}

.instrument-default-check small {
  color: var(--text-dim);
  font-weight: 400;
}

/* Non-modal one-time announcement for existing users. */
.instrument-rollout-prompt {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 1200;
  width: min(390px, calc(100vw - 2rem));
  padding: 1.1rem;
  border: 1px solid rgba(75, 199, 185, 0.44);
  border-radius: 12px;
  background: rgba(24, 23, 21, 0.98);
  color: var(--text);
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.38);
}

[data-theme="light"] .instrument-rollout-prompt {
  background: rgba(255, 253, 250, 0.98);
}

.instrument-rollout-prompt h2 {
  margin: 0.3rem 1.6rem 0.45rem 0;
  font-size: 1.08rem;
}

.instrument-rollout-prompt p {
  margin: 0 0 0.9rem;
  color: var(--text-dim);
  font-size: 0.84rem;
  line-height: 1.5;
}

.instrument-rollout-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
}

.instrument-rollout-close button {
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text-dim);
  font-size: 1.25rem;
  cursor: pointer;
}

.instrument-rollout-close button:hover,
.instrument-rollout-close button:focus-visible {
  background: var(--surface-soft);
  color: var(--text);
}

@media (max-width: 720px) {
  .instrument-section-head,
  .spectrometer-builder-head,
  .instrument-profile-card,
  .instrument-general-mode {
    align-items: stretch;
    flex-direction: column;
  }

  .instrument-form-grid {
    grid-template-columns: 1fr;
  }

  .instrument-field-wide {
    grid-column: auto;
  }

  .instrument-profile-actions {
    width: 100%;
  }

  .instrument-profile-builder > summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .instrument-rollout-prompt {
    right: 0.75rem;
    bottom: 0.75rem;
    width: calc(100vw - 1.5rem);
  }
}

/* ── Appearance system v1: Graphite, Aurora, seasonal accents ── */
[data-skin="graphite"] {
  color-scheme: dark;
  --bg: #0b1015;
  --surface: #111820;
  --surface2: #17212b;
  --surface3: #202c37;
  --surface-soft: rgba(255, 255, 255, 0.045);
  --border: #283541;
  --border-hl: #425363;
  --text: #f1f5f6;
  --text-dim: #a2adb7;
  --text-muted: #74818d;
  --accent: #55c9c1;
  --accent-hover: #7ce0d8;
  --accent-soft: rgba(85, 201, 193, 0.13);
  --accent2: #d9b46b;
  --accent2-soft: rgba(217, 180, 107, 0.14);
  --accent3: #83adf1;
  --danger: #f27b7b;
  --danger-bg: rgba(242, 123, 123, 0.12);
  --shadow-sm: 0 14px 34px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 28px 74px rgba(0, 0, 0, 0.36);
  --skin-background: linear-gradient(180deg, #10171e 0%, #0b1015 52%, #080c10 100%);
}

[data-skin="aurora"] {
  color-scheme: light;
  --bg: #f2f5f8;
  --surface: #ffffff;
  --surface2: #f5f6fb;
  --surface3: #e9ecf5;
  --surface-soft: rgba(61, 50, 104, 0.045);
  --border: #d9dfeb;
  --border-hl: #b8c2d5;
  --text: #1b2433;
  --text-dim: #687386;
  --text-muted: #8b95a6;
  --accent: #6547e8;
  --accent-hover: #5133c8;
  --accent-soft: rgba(101, 71, 232, 0.1);
  --accent2: #168f88;
  --accent2-soft: rgba(22, 143, 136, 0.1);
  --accent3: #347fe7;
  --danger: #c64258;
  --danger-bg: rgba(198, 66, 88, 0.1);
  --shadow-sm: 0 12px 30px rgba(49, 59, 92, 0.09);
  --shadow-md: 0 28px 70px rgba(49, 59, 92, 0.15);
  --skin-background: radial-gradient(circle at 82% 4%, rgba(68, 205, 196, 0.09), transparent 28%), radial-gradient(circle at 15% 0%, rgba(117, 82, 238, 0.08), transparent 32%), linear-gradient(180deg, #f9fbfd 0%, #f2f5f8 52%, #edf1f6 100%);
}

[data-skin] {
  --season-accent: var(--accent);
  --season-accent-strong: var(--accent-hover);
  --season-accent-alt: var(--accent2);
  --season-soft: var(--accent-soft);
  --season-glow: rgba(0, 0, 0, 0);
  --season-glow-alt: rgba(0, 0, 0, 0);
  --season-band: linear-gradient(90deg, var(--season-accent), var(--season-accent-alt));
  --season-button-text: #071312;
}

[data-skin="aurora"] {
  --season-button-text: #ffffff;
}

[data-skin] body {
  background-color: var(--bg);
  background-image: radial-gradient(circle at 12% 8%, var(--season-glow-alt), transparent 31%), radial-gradient(circle at 88% 5%, var(--season-glow), transparent 34%), var(--skin-background);
}

[data-skin="graphite"] header {
  background: rgba(11, 16, 21, 0.9);
  border-bottom-color: rgba(155, 183, 199, 0.13);
}

[data-skin="aurora"] header {
  background: rgba(255, 255, 255, 0.88);
  border-bottom-color: rgba(62, 75, 104, 0.13);
}

[data-skin="graphite"] .history-sidebar {
  background: rgba(10, 15, 20, 0.96);
}

[data-skin="aurora"] .history-sidebar {
  background: rgba(246, 248, 252, 0.95);
}

[data-skin="graphite"] .chat-container {
  background: rgba(17, 24, 32, 0.74);
}

[data-skin="aurora"] .chat-container {
  background: rgba(255, 255, 255, 0.8);
}

[data-skin="graphite"] .chat-input-form,
[data-skin="graphite"] .workspace-shell-empty .chat-input-form {
  background: rgba(14, 21, 28, 0.94);
}

[data-skin="aurora"] .chat-input-form,
[data-skin="aurora"] .workspace-shell-empty .chat-input-form {
  background: rgba(255, 255, 255, 0.94);
}

[data-skin="aurora"] .workspace-shell-empty .chat-input-form {
  border-color: rgba(101, 71, 232, 0.25);
  box-shadow: 0 18px 46px rgba(66, 73, 114, 0.12), 0 0 0 1px rgba(37, 181, 173, 0.05);
}

[data-skin="graphite"] .chat-assistant .chat-bubble {
  background: rgba(20, 29, 38, 0.94);
}

[data-skin="aurora"] .chat-assistant .chat-bubble {
  background: rgba(255, 255, 255, 0.98);
}

[data-skin="graphite"] .chat-user .chat-bubble {
  background: #147f7a;
  border-color: rgba(111, 224, 215, 0.24);
}

[data-skin="aurora"] .chat-user .chat-bubble {
  background: #eeeaff;
  border-color: rgba(101, 71, 232, 0.2);
  color: #2b2152;
  box-shadow: 0 10px 25px rgba(75, 57, 145, 0.1);
}

/* Appearance settings */
.appearance-settings-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.appearance-settings-head h3,
.admin-season-preview-card h3 {
  margin: 0.22rem 0 0.35rem;
}

.appearance-settings-head p,
.admin-season-preview-card p {
  margin: 0;
  max-width: 680px;
}

.appearance-current {
  flex: 0 0 auto;
  padding: 0.42rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text-dim);
  font-size: 0.78rem;
}

.appearance-current strong {
  color: var(--text);
}

.appearance-choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.appearance-choice {
  position: relative;
  min-width: 0;
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr) 24px;
  align-items: center;
  gap: 0.85rem;
  padding: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-soft);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}

.appearance-choice:hover {
  transform: translateY(-1px);
  border-color: var(--border-hl);
  background: var(--surface2);
}

.appearance-choice.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.appearance-choice:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 2px;
}

.appearance-preview {
  height: 68px;
  display: grid;
  grid-template-columns: 28px 1fr;
  grid-template-rows: 15px 1fr 13px;
  overflow: hidden;
  border: 1px solid rgba(128, 142, 160, 0.32);
  border-radius: 9px;
  box-shadow: 0 8px 18px rgba(16, 24, 40, 0.12);
}

.appearance-preview span:first-child {
  grid-column: 1 / -1;
}

.appearance-preview span:nth-child(2) {
  grid-row: 2 / 4;
}

.appearance-preview-graphite {
  background: #121a22;
}

.appearance-preview-graphite span:first-child { background: #0b1015; border-bottom: 1px solid #2a3945; }
.appearance-preview-graphite span:nth-child(2) { background: #0d141a; border-right: 1px solid #2a3945; }
.appearance-preview-graphite span:nth-child(3) { margin: 9px 8px; border-radius: 5px; background: #1c2933; border: 1px solid #344651; }

.appearance-preview-aurora {
  background: linear-gradient(135deg, #ffffff, #f0effa);
}

.appearance-preview-aurora span:first-child { background: #ffffff; border-bottom: 1px solid #dfe3ee; }
.appearance-preview-aurora span:nth-child(2) { background: #f3f5f9; border-right: 1px solid #dfe3ee; }
.appearance-preview-aurora span:nth-child(3) { margin: 9px 8px; border-radius: 5px; background: linear-gradient(90deg, #f0ebff, #e7faf8); border: 1px solid #d9d1fa; }

.appearance-choice-copy {
  min-width: 0;
  display: grid;
  gap: 0.25rem;
}

.appearance-choice-copy strong {
  font-size: 0.92rem;
}

.appearance-choice-copy small {
  color: var(--text-dim);
  font-size: 0.76rem;
  line-height: 1.45;
}

.appearance-check {
  width: 21px;
  height: 21px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: transparent;
  font-size: 0.72rem;
}

.appearance-choice.active .appearance-check {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--season-button-text);
}

.appearance-season-note {
  margin: 0.8rem 0 0;
  color: var(--text-dim);
  font-size: 0.78rem;
}

.appearance-season-note strong {
  color: var(--season-accent);
}

/* Admin-only, browser-local seasonal preview control. */
.admin-season-preview-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin-bottom: 1rem;
  padding: 1rem 1.1rem;
}

.admin-season-preview-copy {
  min-width: 0;
}

.admin-season-preview-control {
  width: min(330px, 100%);
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: auto minmax(170px, 1fr);
  align-items: center;
  gap: 0.35rem 0.65rem;
  color: var(--text-dim);
  font-size: 0.78rem;
  font-weight: 600;
}

.admin-season-preview-control select {
  min-height: 40px;
  padding: 0.45rem 2rem 0.45rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface2);
  color: var(--text);
  font: inherit;
}

.admin-season-preview-control select:focus-visible {
  border-color: var(--season-accent);
  outline: 3px solid var(--season-soft);
  outline-offset: 1px;
}

.admin-season-preview-control small {
  grid-column: 2;
  color: var(--text-muted);
  font-weight: 400;
}

.admin-season-preview-control strong {
  color: var(--season-accent);
}

/* Holiday palettes are intentionally visible while preserving layout and contrast. */
[data-season="new-year"] {
  --season-accent: #e5bd68;
  --season-accent-strong: #f3d58e;
  --season-accent-alt: #83aef2;
  --season-soft: rgba(229, 189, 104, 0.22);
  --season-glow: rgba(229, 189, 104, 0.24);
  --season-glow-alt: rgba(76, 126, 207, 0.18);
  --season-band: linear-gradient(90deg, #d5a83d 0%, #f7df9a 34%, #6f9ee8 68%, #d5a83d 100%);
}

[data-skin="aurora"][data-season="new-year"] {
  --season-accent: #9d6a08;
  --season-accent-strong: #7b5000;
  --season-glow: rgba(229, 189, 104, 0.28);
  --season-glow-alt: rgba(76, 126, 207, 0.16);
}

[data-season="valentine"] {
  --season-accent: #e879a2;
  --season-accent-strong: #f2a0bd;
  --season-accent-alt: #a992ed;
  --season-soft: rgba(232, 121, 162, 0.22);
  --season-glow: rgba(232, 121, 162, 0.25);
  --season-glow-alt: rgba(169, 146, 237, 0.2);
  --season-band: linear-gradient(90deg, #d95f8d 0%, #f2a3bd 38%, #9d82e8 72%, #d95f8d 100%);
}

[data-skin="aurora"][data-season="valentine"] {
  --season-accent: #b73d69;
  --season-accent-strong: #92284f;
  --season-glow: rgba(232, 121, 162, 0.28);
  --season-glow-alt: rgba(169, 146, 237, 0.17);
}

[data-season="spring"] {
  --season-accent: #70c69a;
  --season-accent-strong: #92d9b2;
  --season-accent-alt: #d797d8;
  --season-soft: rgba(112, 198, 154, 0.22);
  --season-glow: rgba(112, 198, 154, 0.24);
  --season-glow-alt: rgba(215, 151, 216, 0.19);
  --season-band: linear-gradient(90deg, #5db887 0%, #9edcaf 34%, #d28bd3 70%, #5db887 100%);
}

[data-skin="aurora"][data-season="spring"] {
  --season-accent: #21865a;
  --season-accent-strong: #156943;
  --season-glow: rgba(112, 198, 154, 0.27);
  --season-glow-alt: rgba(215, 151, 216, 0.16);
}

[data-season="independence"] {
  --season-accent: #65c7e6;
  --season-accent-strong: #91def1;
  --season-accent-alt: #f0b85c;
  --season-soft: rgba(101, 199, 230, 0.22);
  --season-glow: rgba(240, 184, 92, 0.22);
  --season-glow-alt: rgba(64, 171, 205, 0.24);
  --season-band: linear-gradient(90deg, #3aa8ca 0%, #72d2d2 34%, #efc35f 68%, #ed8f65 100%);
}

[data-skin="aurora"][data-season="independence"] {
  --season-accent: #197f9f;
  --season-accent-strong: #11627c;
  --season-glow: rgba(240, 184, 92, 0.25);
  --season-glow-alt: rgba(64, 171, 205, 0.21);
}

[data-season="halloween"] {
  --season-accent: #f2a34f;
  --season-accent-strong: #ffc170;
  --season-accent-alt: #b28af3;
  --season-soft: rgba(242, 163, 79, 0.23);
  --season-glow: rgba(242, 132, 48, 0.26);
  --season-glow-alt: rgba(144, 92, 222, 0.23);
  --season-band: linear-gradient(90deg, #e57b27 0%, #ffb152 38%, #8b5ad4 72%, #e57b27 100%);
}

[data-skin="aurora"][data-season="halloween"] {
  --season-accent: #b25b05;
  --season-accent-strong: #8f4500;
  --season-glow: rgba(242, 132, 48, 0.27);
  --season-glow-alt: rgba(144, 92, 222, 0.2);
}

[data-season="harvest"] {
  --season-accent: #d99955;
  --season-accent-strong: #eab47c;
  --season-accent-alt: #a9b86c;
  --season-soft: rgba(217, 153, 85, 0.23);
  --season-glow: rgba(217, 153, 85, 0.25);
  --season-glow-alt: rgba(147, 164, 80, 0.2);
  --season-band: linear-gradient(90deg, #b96d32 0%, #e6aa69 38%, #8d9f50 72%, #b96d32 100%);
}

[data-skin="aurora"][data-season="harvest"] {
  --season-accent: #9b551d;
  --season-accent-strong: #743b10;
  --season-glow: rgba(217, 153, 85, 0.28);
  --season-glow-alt: rgba(147, 164, 80, 0.17);
}

[data-season="winter"] {
  --season-accent: #82cce8;
  --season-accent-strong: #a9e1f3;
  --season-accent-alt: #a9a4ee;
  --season-soft: rgba(130, 204, 232, 0.22);
  --season-glow: rgba(130, 204, 232, 0.27);
  --season-glow-alt: rgba(145, 138, 225, 0.2);
  --season-band: linear-gradient(90deg, #5db7d9 0%, #bdebf5 38%, #8e88dc 72%, #5db7d9 100%);
}

[data-skin="aurora"][data-season="winter"] {
  --season-accent: #287d9f;
  --season-accent-strong: #17617e;
  --season-glow: rgba(130, 204, 232, 0.29);
  --season-glow-alt: rgba(145, 138, 225, 0.17);
}

[data-season]:not([data-season="none"]) body {
  background-image: radial-gradient(circle at 9% 12%, var(--season-glow-alt), transparent 38%), radial-gradient(circle at 91% 7%, var(--season-glow), transparent 42%), linear-gradient(135deg, color-mix(in srgb, var(--bg) 91%, var(--season-accent-alt) 9%), color-mix(in srgb, var(--bg) 90%, var(--season-accent) 10%));
  background-attachment: fixed;
}

[data-season]:not([data-season="none"]) header {
  border-bottom-color: color-mix(in srgb, var(--season-accent) 62%, var(--border));
  box-shadow: 0 12px 34px color-mix(in srgb, var(--season-glow) 55%, transparent);
}

[data-season]:not([data-season="none"]) header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 3px;
  background: var(--season-band);
  background-size: 180% 100%;
  box-shadow: 0 0 18px var(--season-glow);
}

.season-banner[hidden] {
  display: none !important;
}

.season-banner {
  position: relative;
  z-index: 90;
  max-height: 80px;
  overflow: hidden;
  border-bottom: 1px solid color-mix(in srgb, var(--season-accent) 58%, var(--border));
  background: var(--surface2);
  background: linear-gradient(90deg, color-mix(in srgb, var(--surface2) 76%, var(--season-accent-alt) 24%), color-mix(in srgb, var(--surface2) 72%, var(--season-accent) 28%), color-mix(in srgb, var(--surface2) 78%, var(--season-accent-alt) 22%));
  color: var(--text);
  box-shadow: 0 12px 30px color-mix(in srgb, var(--season-glow) 45%, transparent);
  animation: season-banner-in 0.24s ease-out;
  transform: translateY(0);
  transition: max-height 0.75s ease, opacity 0.55s ease, transform 0.75s ease, border-color 0.55s ease, box-shadow 0.55s ease;
}

.season-banner[data-collapsed="true"] {
  max-height: 0;
  border-bottom-color: transparent;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  box-shadow: none;
}

.season-banner::before,
.season-banner::after {
  content: "";
  position: absolute;
  width: 74px;
  height: 74px;
  border: 1px solid color-mix(in srgb, var(--season-accent-strong) 38%, transparent);
  border-radius: 50%;
  pointer-events: none;
}

.season-banner::before {
  top: -54px;
  left: 12%;
}

.season-banner::after {
  right: 14%;
  bottom: -58px;
}

.season-banner-inner {
  position: relative;
  width: 100%;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.48rem clamp(1rem, 3vw, 2rem);
  text-align: center;
}

.season-banner-icon {
  position: relative;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in srgb, var(--season-accent-strong) 65%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--surface) 72%, var(--season-accent) 28%);
  color: var(--season-accent-strong);
  font-size: 0.96rem;
  line-height: 1;
  box-shadow: 0 0 18px var(--season-glow);
}

.season-banner:not([data-suppressed="true"]) .season-banner-icon {
  animation: season-icon-pop 0.72s cubic-bezier(0.22, 1.35, 0.42, 1) 0.08s both;
}

.season-banner-icon::before,
.season-banner-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 3px;
  height: 3px;
  border-radius: 1px;
  opacity: 0;
  pointer-events: none;
}

.season-banner-icon::before {
  box-shadow: -16px -11px 0 var(--season-accent), 15px -13px 0 var(--season-accent-alt), -19px 7px 0 var(--season-accent-alt), 18px 9px 0 var(--season-accent-strong), -6px -19px 0 var(--season-accent-strong), 7px 19px 0 var(--season-accent);
}

.season-banner:not([data-suppressed="true"]) .season-banner-icon::before {
  animation: season-confetti-burst 0.8s ease-out 0.2s both;
}

.season-banner-icon::after {
  box-shadow: -10px -17px 0 var(--season-accent-alt), 19px -4px 0 var(--season-accent), -18px 14px 0 var(--season-accent-strong), 13px 16px 0 var(--season-accent-alt), 3px -21px 0 var(--season-accent), -2px 21px 0 var(--season-accent-strong);
}

.season-banner:not([data-suppressed="true"]) .season-banner-icon::after {
  animation: season-confetti-burst-alt 0.86s ease-out 0.24s both;
}

.season-banner-copy {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.55rem;
  min-width: 0;
}

.season-banner-copy strong {
  color: var(--text);
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.season-banner-copy small {
  color: var(--text-dim);
  font-size: 0.72rem;
}

.season-mode-toggle {
  position: absolute;
  right: clamp(0.75rem, 2vw, 1.5rem);
  min-height: 28px;
  padding: 0.28rem 0.65rem;
  border: 1px solid color-mix(in srgb, var(--season-accent-strong) 46%, var(--border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 82%, var(--season-accent) 18%);
  color: var(--text-dim);
  font: inherit;
  font-size: 0.68rem;
  font-weight: 650;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.16s ease, color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.season-mode-toggle:hover {
  border-color: var(--season-accent-strong);
  background: color-mix(in srgb, var(--surface) 70%, var(--season-accent) 30%);
  color: var(--text);
  transform: translateY(-1px);
}

.season-mode-toggle:focus-visible {
  outline: 2px solid var(--season-accent-strong);
  outline-offset: 2px;
}

.season-banner[data-suppressed="true"] {
  border-bottom-color: var(--border);
  background: var(--surface2);
  box-shadow: var(--shadow-sm);
}

.season-banner[data-suppressed="true"]::before,
.season-banner[data-suppressed="true"]::after {
  border-color: color-mix(in srgb, var(--text-dim) 18%, transparent);
  opacity: 0.45;
}

.season-banner[data-suppressed="true"] .season-banner-icon {
  border-color: var(--border-hl);
  background: var(--surface);
  color: var(--text-dim);
  box-shadow: none;
}

.season-banner[data-suppressed="true"] .season-banner-icon::before,
.season-banner[data-suppressed="true"] .season-banner-icon::after {
  display: none;
}

.season-banner[data-suppressed="true"] .season-mode-toggle {
  border-color: var(--border-hl);
  background: var(--surface);
}

@keyframes season-banner-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes season-icon-pop {
  0% { opacity: 0; transform: scale(0.45) rotate(-24deg); }
  48% { opacity: 1; transform: scale(1.28) rotate(12deg); }
  72% { transform: scale(0.92) rotate(-5deg); }
  100% { opacity: 1; transform: scale(1) rotate(0); }
}

@keyframes season-confetti-burst {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.2) rotate(0); }
  28% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1.65) rotate(18deg); }
}

@keyframes season-confetti-burst-alt {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.15) rotate(12deg); }
  32% { opacity: 0.95; }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1.8) rotate(-20deg); }
}

[data-season]:not([data-season="none"]) .chat-container,
[data-season]:not([data-season="none"]) .history-sidebar,
[data-season]:not([data-season="none"]) .card {
  border-color: color-mix(in srgb, var(--season-accent) 34%, var(--border));
  box-shadow: 0 18px 48px color-mix(in srgb, var(--season-glow) 36%, transparent);
}

[data-season]:not([data-season="none"]) .workspace-shell-empty .chat-container-empty {
  border-color: color-mix(in srgb, var(--season-accent-alt) 32%, transparent);
  background: linear-gradient(145deg, color-mix(in srgb, var(--surface) 91%, var(--season-accent-alt) 9%), color-mix(in srgb, var(--surface) 92%, var(--season-accent) 8%));
}

[data-season]:not([data-season="none"]) .chat-empty-inner {
  border-radius: 20px;
  background: radial-gradient(circle at 50% 0%, var(--season-soft), transparent 68%);
  box-shadow: 0 0 60px var(--season-glow-alt);
}

[data-season]:not([data-season="none"]) .chat-input-form,
[data-season]:not([data-season="none"]) .workspace-shell-empty .chat-input-form {
  border-color: color-mix(in srgb, var(--season-accent) 58%, var(--border));
  box-shadow: 0 18px 44px color-mix(in srgb, var(--season-glow) 42%, transparent), 0 0 0 2px var(--season-soft);
}

[data-season]:not([data-season="none"]) .chat-assistant .chat-bubble {
  border-left: 3px solid var(--season-accent-alt);
  background: linear-gradient(135deg, color-mix(in srgb, var(--surface) 94%, var(--season-accent-alt) 6%), color-mix(in srgb, var(--surface) 96%, var(--season-accent) 4%));
}

[data-season]:not([data-season="none"]) .chat-user .chat-bubble {
  border-color: color-mix(in srgb, var(--season-accent-strong) 72%, transparent);
  background: linear-gradient(135deg, var(--season-accent-alt), var(--season-accent));
  color: var(--season-button-text);
  box-shadow: 0 12px 30px color-mix(in srgb, var(--season-glow) 58%, transparent);
}

[data-season]:not([data-season="none"]) .logo-icon {
  border-color: var(--season-accent);
  background: linear-gradient(145deg, var(--season-accent-alt), var(--season-accent));
  color: var(--season-button-text);
  box-shadow: 0 0 0 3px var(--season-soft);
}

[data-season]:not([data-season="none"]) .nav-link.active,
[data-season]:not([data-season="none"]) .sidebar-kicker,
[data-season]:not([data-season="none"]) .sidebar-section-label,
[data-season]:not([data-season="none"]) .sidebar-date-group,
[data-season]:not([data-season="none"]) .chat-empty-eyebrow,
[data-season]:not([data-season="none"]) .workspace-kicker {
  color: var(--season-accent);
}

[data-season]:not([data-season="none"]) .nav-link.active,
[data-season]:not([data-season="none"]) .sidebar-conv-item.active,
[data-season]:not([data-season="none"]) .btn-new-chat {
  border-color: var(--season-accent);
  background: var(--season-soft);
}

[data-season]:not([data-season="none"]) #chat-send-btn,
[data-season]:not([data-season="none"]) .chat-input-row .btn-primary {
  border-color: var(--season-accent);
  background: var(--season-accent);
  color: var(--season-button-text);
}

[data-season]:not([data-season="none"]) #chat-send-btn:hover,
[data-season]:not([data-season="none"]) .chat-input-row .btn-primary:hover {
  background: var(--season-accent-strong);
  color: var(--season-button-text);
}

@media (max-width: 760px) {
  .appearance-settings-head,
  .admin-season-preview-card {
    align-items: stretch;
    flex-direction: column;
  }

  .appearance-current {
    align-self: flex-start;
  }

  .appearance-choice-grid {
    grid-template-columns: 1fr;
  }

  .admin-season-preview-control {
    width: 100%;
  }
}

@media (max-width: 440px) {
  .season-banner-inner {
    justify-content: flex-start;
    min-height: 54px;
    padding-block: 0.42rem;
    text-align: left;
  }

  .season-banner-copy {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.05rem;
  }

  .season-mode-toggle {
    position: static;
    flex: 0 0 auto;
    margin-left: auto;
  }

  .appearance-choice {
    grid-template-columns: 78px minmax(0, 1fr) 21px;
    gap: 0.6rem;
  }

  .appearance-preview {
    height: 58px;
  }

  .admin-season-preview-control {
    grid-template-columns: 1fr;
  }

  .admin-season-preview-control small {
    grid-column: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .appearance-choice,
  [data-season]:not([data-season="none"]) .logo-icon {
    transition: none;
  }

  .season-banner {
    animation: none;
  }

  .season-banner-icon,
  .season-banner-icon::before,
  .season-banner-icon::after,
  .season-mode-toggle,
  .season-banner-disclosure,
  .season-banner-disclosure span {
    animation: none;
    transition: none;
  }
}

/* ── Help, legal pages, and first-use consent ───────────── */
.help-shell,
.legal-shell {
  width: min(940px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4.75rem) 0 5rem;
}

.help-hero,
.legal-header {
  max-width: 780px;
  margin-bottom: 2rem;
}

.help-hero h1,
.legal-header h1 {
  margin: 0.35rem 0 0.85rem;
  font-size: clamp(2.15rem, 6vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.help-hero > p,
.legal-lede {
  max-width: 720px;
  margin: 0;
  color: var(--text-dim);
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.7;
}

.legal-eyebrow,
.legal-consent-kicker {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.legal-meta {
  margin-top: 1.2rem;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.76rem;
}

.help-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.help-card {
  min-height: 250px;
  padding: 1.4rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.12);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.help-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 20px 55px rgba(0, 0, 0, 0.18);
}

.help-card-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: 13px;
  background: color-mix(in srgb, var(--accent) 12%, var(--surface2));
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 700;
}

.help-card h2 {
  margin: 1.1rem 0 0.55rem;
  font-size: 1.2rem;
}

.help-card p {
  min-height: 4.9rem;
  margin: 0 0 1.2rem;
  color: var(--text-dim);
  line-height: 1.55;
}

.help-card-link {
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
}

.help-callout {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(300px, 1.2fr);
  gap: 2rem;
  margin: 2rem 0;
  padding: clamp(1.4rem, 4vw, 2.25rem);
  border: 1px solid color-mix(in srgb, var(--accent) 38%, var(--border));
  border-radius: 20px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 11%, var(--surface)), var(--surface));
}

.help-callout h2,
.help-contact h2 {
  margin: 0.45rem 0 0;
}

.help-callout > p,
.help-contact p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.65;
}

.help-contact {
  margin-top: 1rem;
}

.help-contact h2 {
  margin-bottom: 0.55rem;
}

.legal-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0 0 2rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--border);
}

.legal-jump a {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text-dim);
  font-size: 0.78rem;
  text-decoration: none;
}

.legal-jump a:hover {
  border-color: var(--accent);
  color: var(--text);
}

.legal-summary,
.legal-note {
  margin: 1.5rem 0 2rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid color-mix(in srgb, var(--accent2) 45%, var(--border));
  border-radius: 14px;
  background: color-mix(in srgb, var(--accent2) 9%, var(--surface));
  line-height: 1.6;
}

.legal-section {
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 90px;
}

.legal-section h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.18rem, 2.6vw, 1.48rem);
}

.legal-section p,
.legal-section li {
  color: color-mix(in srgb, var(--text) 83%, var(--text-dim));
  line-height: 1.72;
}

.legal-section p {
  margin: 0.65rem 0;
}

.legal-section li + li {
  margin-top: 0.45rem;
}

.legal-section a,
.legal-note a,
.help-shell a:not(.help-card) {
  color: var(--accent);
}

.legal-caps p {
  font-size: 0.86rem;
  letter-spacing: 0.015em;
}

body:has(.legal-shell) footer,
body:has(.help-shell) footer {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

.footer-legal-links {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
}

.footer-legal-links a {
  color: inherit;
  text-decoration: none;
}

.footer-legal-links a:hover {
  color: var(--accent);
}

.legal-consent-backdrop {
  position: fixed;
  z-index: 10000;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  overflow-y: auto;
  background: rgba(4, 8, 13, 0.78);
  backdrop-filter: blur(13px);
  -webkit-backdrop-filter: blur(13px);
}

.legal-consent-dialog {
  width: min(670px, 100%);
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  padding: clamp(1.35rem, 4vw, 2.25rem);
  border: 1px solid color-mix(in srgb, var(--accent) 46%, var(--border));
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 32px 100px rgba(0, 0, 0, 0.52);
}

.legal-consent-dialog h2 {
  margin: 0.4rem 0 1rem;
  font-size: clamp(1.55rem, 4vw, 2.15rem);
  letter-spacing: -0.025em;
}

.legal-consent-copy {
  color: var(--text-dim);
  line-height: 1.62;
}

.legal-consent-copy p {
  margin: 0.7rem 0;
}

.legal-consent-copy a,
.legal-consent-check a {
  color: var(--accent);
}

.legal-consent-documents {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1rem;
}

.legal-consent-documents a {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--text);
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease;
}

.legal-consent-documents a:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--surface-soft));
}

.legal-consent-documents strong {
  color: var(--accent);
  font-size: 0.86rem;
}

.legal-consent-documents span {
  color: var(--text-dim);
  font-size: 0.72rem;
  line-height: 1.4;
}

.legal-consent-form {
  margin-top: 1.25rem;
}

.legal-consent-check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: start;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--surface-soft);
  line-height: 1.55;
  cursor: pointer;
}

.legal-consent-check input {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.18rem;
  accent-color: var(--accent);
}

.legal-consent-button {
  width: 100%;
  margin-top: 1rem;
  padding: 0.8rem 1rem;
}

.legal-consent-button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

@media (max-width: 760px) {
  .help-card-grid,
  .help-callout {
    grid-template-columns: 1fr;
  }

  .help-card {
    min-height: 0;
  }

  .help-card p {
    min-height: 0;
  }

  .legal-consent-backdrop {
    align-items: start;
  }

  .legal-consent-documents {
    grid-template-columns: 1fr;
  }
}