/* =============================================================================
   Deep Research — entry / about / faq / graph pages.
   Design language mirrors krisyotam/share + krisyotam/tools.
   Index page uses its own static/index.css.
   ============================================================================= */

/* ── Tokens — OpenAI (ChatGPT) language ─────────────────────────
   See CLAUDE.md for the full reference + local divergences.       */
:root {
  /* OpenAI named palette */
  --color-carbon:      #0d0d0d;
  --color-snow:        #ffffff;
  --color-fog:         #f9f9f9;
  --color-pewter:      #5d5d5d;
  --color-stone:       #8f8f8f;
  --color-arctic-mist: #ececec;
  --color-link-blue:   #007aff;

  /* Semantic surfaces (light default) */
  --bg-color:   var(--color-snow);
  --bg-surface: var(--color-fog);
  --bg-hover:   var(--color-arctic-mist);
  --fg-color:   var(--color-carbon);
  --fg-muted:   var(--color-pewter);
  --fg-dim:     var(--color-stone);
  --border-color: rgba(0,0,0,0.08);
  --rule-color:   rgba(0,0,0,0.12);
  --link:         var(--color-link-blue);
  --code-bg:      var(--color-fog);
  --panel-bg:     var(--color-snow);

  /* Legacy HSL-triple aliases — preserved so the rest of the
     stylesheet (toolbar, panel, sidebar) doesn't need a rewrite. */
  --bg:        0 0% 100%;
  --fg:        0 0% 5%;
  --fg-dim-h:  0 0% 56%;
  --muted:     0 0% 92%;
  --muted-fg:  0 0% 37%;
  --border:    0 0% 92%;
  --rule:      0 0% 86%;
  --accent:    0 0% 98%;

  /* Aliases used by d3 graph code — keep them resolving to colors */
  --text:       var(--fg-color);
  --text-muted: var(--fg-muted);
  --text-dim:   var(--color-stone);

  /* Type families — OpenAI uses the system stack */
  --font-ui:    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
                "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-title: 'Lora', ui-serif, Georgia, Cambria, 'Times New Roman', serif;
  --font-mono:  ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  /* Aliases for older rules that referenced --serif / --sans / --mono */
  --serif: var(--font-title);
  --sans:  var(--font-ui);
  --mono:  var(--font-mono);

  /* OpenAI type scale */
  --text-caption:      14px;  --leading-caption:    1.43;
  --text-body:         16px;  --leading-body:       1.5;
  --text-subheading:   18px;  --leading-subheading: 1.56;
  --text-heading:      24px;  --leading-heading:    1;

  /* OpenAI spacing scale */
  --spacing-4: 4px;   --spacing-6: 6px;    --spacing-8: 8px;
  --spacing-10: 10px; --spacing-12: 12px;  --spacing-16: 16px;
  --spacing-20: 20px; --spacing-60: 60px;  --spacing-64: 64px;
  --spacing-127: 127px;

  /* Radii */
  --radius-default: 10px;
  --radius-button:  10px;
  --radius-pill:    16px;
  --radius-input:   28px;

  --sidebar-w:    56px;
  --panel-w:      380px;
  --max-content:  720px;
  --max-breakout: 1100px;
}

[data-theme="dark"] {
  --bg-color:     #121212;
  --bg-surface:   #1a1a1a;
  --bg-hover:     #222222;
  --fg-color:     #f3f3f3;
  --fg-muted:     #a8a8a8;
  --fg-dim:       #6f6f6f;
  --border-color: rgba(255,255,255,0.10);
  --rule-color:   rgba(255,255,255,0.16);
  --code-bg:      #1a1a1a;
  --panel-bg:     #121212;

  --bg:        0 0% 7%;
  --fg:        0 0% 95%;
  --fg-dim-h:  0 0% 44%;
  --muted:     0 0% 8%;
  --muted-fg:  0 0% 66%;
  --border:    0 0% 10%;
  --rule:      0 0% 14%;
  --accent:    0 0% 8%;

  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]):not([data-theme="dark"]) {
    color-scheme: dark;
    --bg-color:     #121212;
    --bg-surface:   #1a1a1a;
    --bg-hover:     #222222;
    --fg-color:     #f3f3f3;
    --fg-muted:     #a8a8a8;
    --fg-dim:       #6f6f6f;
    --border-color: rgba(255,255,255,0.10);
    --rule-color:   rgba(255,255,255,0.16);
    --code-bg:      #1a1a1a;
    --panel-bg:     #121212;

    --bg:        0 0% 7%;
    --fg:        0 0% 95%;
    --fg-dim-h:  0 0% 44%;
    --muted:     0 0% 8%;
    --muted-fg:  0 0% 66%;
    --border:    0 0% 10%;
    --rule:      0 0% 14%;
    --accent:    0 0% 8%;
  }
}

/* Theme-icon visibility (Sun shown in dark, Moon shown in light) */
.theme-icon-light { display: none; }
.theme-icon-dark  { display: flex; }
[data-theme="dark"] .theme-icon-light { display: flex; }
[data-theme="dark"] .theme-icon-dark  { display: none; }

/* ── Base ─────────────────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; }
html, body {
  background: var(--bg-color);
  color: var(--fg-color);
}
body {
  font-family: var(--font-ui);
  font-feature-settings: "liga" 0;
  font-size: var(--text-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ── Layout ───────────────────────────────────────────────────── */
.layout { display: flex; min-height: 100vh; min-height: 100dvh; }

/* ── Left sidebar — minimal dot rail + hover tooltips (original) ── */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-16) 0;
  z-index: 10;
}

.sidebar-back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: hsl(var(--muted-fg));
  text-decoration: none;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}
.sidebar-back:hover { background: hsl(var(--accent)); color: hsl(var(--fg)); }
.sidebar-back svg { width: 18px; height: 18px; }

.toc {
  margin: auto 0;            /* center the dot cluster in remaining sidebar space */
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  padding: 8px;
  overflow-y: auto;
  flex: 0 0 auto;            /* take natural height; don't stretch */
  max-height: calc(100% - 64px);  /* safety: scroll if cluster is taller than viewport */
  scrollbar-width: none;
}
.toc::-webkit-scrollbar { display: none; }

.toc li { position: relative; }

.toc a {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fg-dim);              /* Stone — visible on Fog rail */
  margin: 4px auto;
  transition: background 0.2s, transform 0.2s;
  text-decoration: none;
}
.toc a:hover,
.toc a.active {
  background: var(--fg-color);            /* Carbon — focused dot pops */
  transform: scale(1.5);
}

.toc-tooltip {
  position: absolute;
  left: 48px;
  top: 50%;
  transform: translateY(-50%);
  background: hsl(var(--bg));
  border: 1px solid hsl(var(--border));
  color: hsl(var(--fg));
  padding: 4px 10px;
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 100;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
[data-theme="dark"] .toc-tooltip { box-shadow: 0 4px 16px rgba(0,0,0,0.4); }
.toc li:hover .toc-tooltip { opacity: 1; }

/* ── Main content column ──────────────────────────────────────── */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 72px 56px 120px;
}
.content {
  max-width: var(--max-content);
  width: 100%;
}

/* ── Header section (title + meta) ─────────────────────────────
   Title: Lora serif — the only font distinction in the document,
   marking "editorial report" the way OpenAI Sans marks the hero
   prompt on chatgpt.com. Sized at the heading rung but weight 500.
   ============================================================== */
.content > h1 {
  font-family: var(--font-title);
  font-weight: 500;
  font-size: 36px;
  letter-spacing: -0.016em;
  line-height: 1.12;
  color: var(--fg-color);
  margin: 0 0 var(--spacing-12);
}
.content-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--fg-muted);
  margin-bottom: var(--spacing-64);
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-10);
}
.content-meta time { font-variant-numeric: tabular-nums; }
.content-meta .sep {
  color: var(--color-stone);
  opacity: 0.5;
  font-size: 12px;
  line-height: 1;
}
.content-meta .meta-tags { color: var(--fg-muted); }

/* ── Content typography — OpenAI ─────────────────────────────────
   System UI for body and section headings. 16/1.7 (1.7 line-height is
   our local divergence from 1.5; long-form reading wants it).
   Headings stay within the 24px max weight 600 rule.
   =============================================================== */
.content {
  font-family: var(--font-ui);
  font-feature-settings: "liga" 0;
  font-size: var(--text-body);
  line-height: 1.7;
  color: var(--fg-color);
  font-weight: 400;
}
.content h2 {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--text-heading);
  letter-spacing: -0.012em;
  line-height: 1.15;
  margin: var(--spacing-64) 0 var(--spacing-16);
  color: var(--fg-color);
}
.content h3 {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--text-subheading);
  letter-spacing: -0.005em;
  line-height: var(--leading-subheading);
  margin: 40px 0 var(--spacing-10);
  color: var(--fg-color);
}
.content h4 {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--text-caption);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: var(--spacing-20) 0 var(--spacing-6);
}
.content h5, .content h6 {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: var(--text-caption);
  color: var(--fg-color);
  margin: var(--spacing-16) 0 var(--spacing-6);
}
.content h2 + h3, .content h3 + h4 { margin-top: var(--spacing-16); }
.content p { margin-bottom: var(--spacing-16); }
.content a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--link) 30%, transparent);
  padding-bottom: 1px;
  transition: border-color 140ms ease;
}
.content a:hover { border-bottom-color: var(--link); }

.content ul, .content ol { margin: 0 0 var(--spacing-16) 0; padding-left: var(--spacing-20); }
.content li { margin-bottom: var(--spacing-6); }

.content blockquote {
  border-left: 2px solid var(--rule-color);
  padding: var(--spacing-4) 0 var(--spacing-4) var(--spacing-16);
  color: var(--fg-muted);
  margin: var(--spacing-20) 0;
}
.content blockquote blockquote {
  margin-top: var(--spacing-8);
  border-left-color: var(--border-color);
}

.content strong { font-weight: 600; color: var(--fg-color); }
.content em { font-style: italic; }
/* Markdown often double-bolds headings with ** — keep heading weight neutral. */
.content h1 strong, .content h2 strong, .content h3 strong,
.content h4 strong, .content h5 strong, .content h6 strong {
  font-weight: inherit;
  color: inherit;
}

.content code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  padding: 1px 6px;
  border-radius: var(--radius-default);
}
.content pre {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-default);
  padding: var(--spacing-12) var(--spacing-16);
  margin: var(--spacing-20) 0;
  overflow-x: auto;
}
.content pre code { background: transparent; border: 0; padding: 0; font-size: inherit; }

.content hr {
  border: 0;
  border-top: 1px solid var(--rule-color);
  margin: var(--spacing-60) 0;
}

.content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--spacing-20) auto;
  border-radius: var(--radius-default);
}

/* Tables — break out of the 720px reading column up to 1100px wide,
   centered within .main, never crossing the 56px sidebar.
   The table itself uses the OpenAI spacing/density.                */
.content .table-wrap {
  position: relative;
  width: min(var(--max-breakout), calc(100vw - var(--sidebar-w) - var(--spacing-64)));
  left: 50%;
  transform: translateX(-50%);
  margin: var(--spacing-20) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-default);
}
.content table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  margin: 0;
}
.content thead {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}
.content th {
  text-align: left;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
  padding: var(--spacing-10) var(--spacing-12);
  white-space: nowrap;
}
.content td {
  padding: var(--spacing-10) var(--spacing-12);
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}
.content tbody tr:last-child td { border-bottom: none; }
.content tbody tr:hover { background: var(--bg-surface); }
.content tbody tr { transition: background 120ms ease; }

.content dl { margin-bottom: var(--spacing-16); }
.content dt { font-weight: 600; margin-bottom: var(--spacing-4); }
.content dd { margin-left: var(--spacing-20); margin-bottom: var(--spacing-12); color: var(--fg-muted); }

.cite-ref {
  font-family: var(--font-mono);
  font-size: 11px;
  vertical-align: super;
  color: var(--link);
  cursor: pointer;
  margin-left: 1px;
}
.cite-ref:hover { text-decoration: underline; }

/* ── Toolbar (top right) ─────────────────────────────────────── */
.toolbar {
  position: fixed;
  top: 18px;
  right: 24px;
  display: flex;
  gap: 6px;
  z-index: 20;
}
.toolbar-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid hsl(var(--border));
  border-radius: 4px;
  background: hsl(var(--bg));
  color: hsl(var(--fg-dim));
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
  position: relative;
}
.toolbar-btn:hover { background: hsl(var(--accent)); color: hsl(var(--fg)); border-color: hsl(var(--rule)); }
.toolbar-btn svg { width: 15px; height: 15px; }

/* ── Download dropdown ───────────────────────────────────────── */
.download-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: hsl(var(--bg));
  border: 1px solid hsl(var(--border));
  border-radius: 6px;
  padding: 4px;
  min-width: 180px;
  display: none;
  flex-direction: column;
  box-shadow: 0 6px 24px rgba(0,0,0,0.08);
}
[data-theme="dark"] .download-menu { box-shadow: 0 6px 24px rgba(0,0,0,0.35); }
.download-menu.open { display: flex; }
.download-menu button {
  appearance: none;
  background: none;
  border: none;
  color: hsl(var(--fg));
  padding: 8px 12px;
  text-align: left;
  font-family: var(--sans);
  font-size: 13px;
  border-radius: 4px;
  cursor: pointer;
}
.download-menu button:hover { background: hsl(var(--accent)); }

/* ── Sources panel — sexier OpenAI-inspired right rail ─────────── */
.sources-panel {
  position: fixed;
  top: 0; right: 0;
  width: var(--panel-w);
  height: 100vh;
  height: 100dvh;
  background: hsl(var(--bg));
  border-left: 1px solid hsl(var(--border));
  transform: translateX(100%);
  transition: transform 280ms cubic-bezier(0.22, 0.61, 0.36, 1);
  z-index: 30;
  display: flex;
  flex-direction: column;
  box-shadow: -20px 0 60px rgba(0,0,0,0.04);
}
[data-theme="dark"] .sources-panel { box-shadow: -20px 0 60px rgba(0,0,0,0.4); }
.sources-panel.open { transform: translateX(0); }

.sources-header {
  padding: 22px 24px 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
  border-bottom: 1px solid hsl(var(--border));
}
.sources-header-text { display: flex; flex-direction: column; gap: 4px; }
.sources-header h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.005em;
  color: hsl(var(--fg));
  line-height: 1.2;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}
.sources-header h3 .count {
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: hsl(var(--muted-fg));
  background: transparent;
  border: 0;
  padding: 0;
  font-variant-numeric: tabular-nums;
}
.sources-header-sub {
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: hsl(var(--muted-fg));
}

.sources-close {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  color: hsl(var(--muted-fg));
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
  flex-shrink: 0;
}
.sources-close:hover { background: hsl(var(--accent)); color: hsl(var(--fg)); border-color: hsl(var(--border)); }
.sources-close svg { width: 14px; height: 14px; }

.sources-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px 24px;
  scrollbar-width: thin;
  scrollbar-color: hsl(var(--border)) transparent;
}
.sources-list::-webkit-scrollbar { width: 6px; }
.sources-list::-webkit-scrollbar-thumb { background: hsl(var(--border)); border-radius: 3px; }

.source-item {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  padding: 12px 12px 12px 10px;
  border-radius: 8px;
  text-decoration: none;
  color: hsl(var(--fg));
  transition: background 140ms ease, transform 140ms ease;
  margin-bottom: 1px;
  align-items: start;
  position: relative;
}
.source-item:hover { background: hsl(var(--accent)); }
.source-item:active { transform: scale(0.995); }

/* Favicon — replaces the old numeric chip */
.source-icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  margin-top: 2px;
  object-fit: contain;
  flex-shrink: 0;
  background: hsl(var(--accent));
}

.source-body { min-width: 0; display: flex; flex-direction: column; gap: 4px; }

/* Source panel typography — pinned explicitly to the pre-overhaul stack
   (Inter + JetBrains Mono) so it doesn't drift when global tokens move. */
.source-title {
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.4;
  color: hsl(var(--fg));
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}
.source-url {
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 11px;
  color: hsl(var(--muted-fg));
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Graph modal ─────────────────────────────────────────────── */
.graph-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 50;
  align-items: center;
  justify-content: center;
}
[data-theme="dark"] .graph-backdrop { background: rgba(0, 0, 0, 0.65); }
.graph-backdrop.open { display: flex; }
.graph-modal {
  width: 80vw;
  height: 80vh;
  background: hsl(var(--bg));
  border: 1px solid hsl(var(--border));
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}
.graph-modal svg { width: 100%; height: 100%; }
.graph-modal-tooltip {
  position: absolute;
  top: 14px; left: 14px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--fg-color);
  padding: 6px 12px;
  border-radius: var(--radius-default);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.005em;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 180ms ease;
  z-index: 51;
}
.graph-modal-tooltip.visible { opacity: 1; }

/* ── Static pages (about, faq, /graph/) ──────────────────────── */
.page-container {
  max-width: 640px;
  margin: 80px auto 64px;
  padding: 0 32px;
}
.page-container h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 32px;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin-bottom: 28px;
}
.page-container h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 20px;
  margin-top: 36px;
  margin-bottom: 12px;
}
.page-container p, .page-container li {
  color: hsl(var(--fg));
  line-height: 1.72;
  margin-bottom: 12px;
  font-size: 15px;
}
.page-container a {
  color: hsl(var(--fg));
  text-decoration: underline;
  text-decoration-color: hsl(var(--rule));
  text-underline-offset: 3px;
}
.page-container a:hover { text-decoration-color: hsl(var(--fg-dim)); }

.page-nav {
  margin-bottom: 48px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.page-nav a {
  color: hsl(var(--muted-fg));
  text-decoration: none;
  transition: color 120ms ease;
}
.page-nav a:hover { color: hsl(var(--fg)); }

/* Page-level theme button (about / faq) — kept for compatibility */
.page-theme-btn {
  position: fixed;
  top: 16px; right: 24px;
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 4px;
  border: 1px solid hsl(var(--border));
  background: hsl(var(--bg));
  color: hsl(var(--fg-dim));
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
  z-index: 20;
}
.page-theme-btn:hover { background: hsl(var(--accent)); color: hsl(var(--fg)); border-color: hsl(var(--rule)); }
.page-theme-btn svg { width: 16px; height: 16px; }

/* Epigraph (only on legacy pages; not on the new index) */
.epigraph { margin-bottom: 32px; }
.epigraph blockquote {
  border-left: 2px solid hsl(var(--rule));
  padding-left: 16px;
  margin: 0 0 8px;
  color: hsl(var(--muted-fg));
  font-style: italic;
  line-height: 1.7;
  font-size: 14px;
}
.epigraph cite {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: hsl(var(--muted-fg));
  font-style: normal;
  padding-left: 16px;
}

/* FAQ page */
.faq-container {
  max-width: 640px;
  margin: 80px auto 64px;
  padding: 0 32px;
}
.faq-header { margin-bottom: 32px; }
.faq-header h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 28px;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin-bottom: 12px;
}
.faq-meta {
  display: flex; gap: 24px;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: hsl(var(--muted-fg));
}
.faq-toc {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid hsl(var(--rule));
}
.faq-toc h2 {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: hsl(var(--muted-fg));
  margin-bottom: 10px;
}
.faq-toc ol { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.faq-toc li a {
  font-size: 14px;
  color: hsl(var(--muted-fg));
  text-decoration: none;
  line-height: 1.6;
  transition: color 120ms ease;
}
.faq-toc li a:hover { color: hsl(var(--fg)); }
.faq-body h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 18px;
  margin: 36px 0 10px;
  color: hsl(var(--fg));
}
.faq-body p {
  font-size: 15px;
  color: hsl(var(--fg));
  line-height: 1.72;
  margin-bottom: 12px;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar { display: none; }
  .main { margin-left: 0; padding: 56px 24px 96px; }
}
@media (max-width: 560px) {
  .toolbar { right: 14px; top: 14px; }
  .sources-panel { width: 100%; }
  .content table { font-size: 13px; }
  .content th, .content td { padding: 6px 8px; }
  .entry-title { font-size: 28px; }
  .page-container, .faq-container { padding: 0 22px; margin: 56px auto 48px; }
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: hsl(var(--border)); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: hsl(var(--rule)); }

/* ── Print ─────────────────────────────────────────────────── */
@media print {
  .sidebar, .toolbar, .sources-panel, .page-theme-btn { display: none !important; }
  .main { margin-left: 0; padding: 0; }
  body { background: #fff; color: #000; font-family: Georgia, serif; }
  .content a { color: #000; }
  .content pre { border-color: #ccc; background: #f6f6f6; }
}