:root {
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Libre Baskerville', Georgia, 'Times New Roman', serif;
  --sidebar-width: 280px;
  --topbar-height: 52px;
  --a4-width: 210mm;
  --collab-presence-width: 8.5rem;
  --radius: 6px;
}

html[data-theme='light'] {
  --color-bg: #f0eeea;
  --color-surface: #faf9f7;
  --color-paper: #ffffff;
  --color-border: #ddd8cf;
  --color-text: #1c1917;
  --color-muted: #6b6560;
  --color-accent: #1a1a1a;
  --color-accent-dark: #000000;
  --color-accent-soft: #eceae6;
  --color-featured: #1a1a1a;
  --color-heading: #0f172a;
  --color-prose: #334155;
  --color-divider: #e2e8f0;
  --color-subtle-bg: #f8fafc;
  --color-subtle-bg-2: #fafbfc;
  --color-subtle-bg-3: #f1f5f9;
  --color-nav-hover: #f1f5f9;
  --color-doc-meta-bg: #faf9f7;
  --color-code-bg: #0f172a;
  --color-code-fg: #e2e8f0;
  --color-code-inline-bg: #f1f5f9;
  --color-code-inline-fg: #be123c;
  --color-diagram-bg: #fafbfc;
  --color-diagram-viewport: #f8f7f5;
  --color-diagram-hint-bg: rgba(28, 25, 23, 0.72);
  --color-diagram-hint-fg: #faf9f7;
  --color-diagram-hint-border: transparent;
  --color-btn-primary-fg: #faf9f7;
  --color-hover-border: #c4bdb3;
  --color-hover-shadow: rgba(28, 25, 23, 0.06);
  --color-overlay: rgba(28, 25, 23, 0.45);
  --color-overlay-heavy: rgba(28, 25, 23, 0.55);
  --color-overlay-badge: rgba(28, 25, 23, 0.72);
  --color-panel-shadow: rgba(28, 25, 23, 0.2);
  --color-panel-shadow-lg: rgba(28, 25, 23, 0.25);
  --color-search-mark: #fde68a;
  --color-draft-bg: #fef3c7;
  --color-draft-fg: #92400e;
  --color-draft-banner-bg: #fffbeb;
  --color-draft-banner-border: #fcd34d;
  --color-draft-banner-fg: #78350f;
  --color-link: var(--color-accent);
  --color-link-hover: var(--color-accent-dark);
  --shadow-sheet: 0 1px 2px rgba(28, 25, 23, 0.06), 0 12px 32px rgba(28, 25, 23, 0.08);
  color-scheme: light;
}

html[data-theme='dark'] {
  --color-bg: #0c0e14;
  --color-surface: #12151d;
  --color-paper: #181c27;
  --color-border: #2a3142;
  --color-text: #e8eaed;
  --color-muted: #9aa0ab;
  --color-accent: #c4c8d0;
  --color-accent-dark: #f1f3f5;
  --color-accent-soft: #222836;
  --color-featured: #e8eaed;
  --color-heading: #f1f5f9;
  --color-prose: #c4cad4;
  --color-divider: #2f3749;
  --color-subtle-bg: #1e2433;
  --color-subtle-bg-2: #1a2030;
  --color-subtle-bg-3: #252b3a;
  --color-nav-hover: #252b3a;
  --color-doc-meta-bg: #1a2030;
  --color-code-bg: #0a0d14;
  --color-code-fg: #e2e8f0;
  --color-code-inline-bg: #252b3a;
  --color-code-inline-fg: #fda4af;
  --color-diagram-bg: #1a2030;
  --color-diagram-viewport: #141824;
  --color-diagram-hint-bg: rgba(12, 14, 20, 0.82);
  --color-diagram-hint-fg: #e8eaed;
  --color-diagram-hint-border: #3d465c;
  --color-btn-primary-fg: #0c0e14;
  --color-hover-border: #3d465c;
  --color-hover-shadow: rgba(0, 0, 0, 0.25);
  --color-overlay: rgba(0, 0, 0, 0.62);
  --color-overlay-heavy: rgba(0, 0, 0, 0.72);
  --color-overlay-badge: rgba(0, 0, 0, 0.78);
  --color-panel-shadow: rgba(0, 0, 0, 0.45);
  --color-panel-shadow-lg: rgba(0, 0, 0, 0.55);
  --color-search-mark: #854d0e;
  --color-draft-bg: #422006;
  --color-draft-fg: #fcd34d;
  --color-draft-banner-bg: #1c1408;
  --color-draft-banner-border: #854d0e;
  --color-draft-banner-fg: #fde68a;
  --color-link: #93c5fd;
  --color-link-hover: #bfdbfe;
  --shadow-sheet: 0 1px 2px rgba(0, 0, 0, 0.35), 0 12px 32px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

[data-theme='dark'] .btn-primary {
  background: #e8eaed;
  color: var(--color-btn-primary-fg);
}

[data-theme='dark'] .btn-primary:hover {
  background: #ffffff;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
}

/* Top bar */
.top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: auto;
  min-height: var(--topbar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow: visible;
}

.top-bar-inner {
  display: grid;
  grid-template-columns: auto minmax(200px, 420px) auto;
  grid-template-areas: 'brand search actions';
  align-items: center;
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 8px 20px;
  height: auto;
}

/* On desktop, flatten mobile row so brand | search | actions sit in one grid row */
.top-bar-mobile-row {
  display: contents;
}

.brand {
  grid-area: brand;
}

.search-trigger {
  grid-area: search;
}

.top-bar-end {
  grid-area: actions;
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
  min-width: 0;
  flex-shrink: 0;
}

/* Fixed-width slot so action buttons never shift */
.collab-presence-slot {
  display: none;
  flex: 0 0 var(--collab-presence-width);
  width: var(--collab-presence-width);
  min-width: var(--collab-presence-width);
  max-width: var(--collab-presence-width);
  position: relative;
  z-index: 2;
}

body.collab-active .collab-presence-slot {
  display: block;
}

.top-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex: 0 0 auto;
  flex-shrink: 0;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
  text-decoration: none;
  color: var(--color-text);
  line-height: 1.15;
}

.brand-wordmark {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-meta {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.03em;
}

.brand-meta--short {
  display: none;
}

.search-trigger-text--short {
  display: none;
}

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

.btn-icon-md {
  /* icon + optional label; compact padding when label hidden via media query */
}

.comment-toggle-label {
  font-size: 13px;
}

.search-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-paper);
  color: var(--color-muted);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-trigger:hover {
  border-color: var(--color-hover-border);
  box-shadow: 0 1px 4px var(--color-hover-shadow);
}

.search-trigger-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-kbd {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface);
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  color: var(--color-muted);
  line-height: 1.4;
}

.comment-toggle {
  position: relative;
}

.comment-count:empty {
  display: none;
}

.comment-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin-left: 2px;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-btn-primary-fg);
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
}

html[data-theme='dark'] .comment-count {
  background: #93c5fd;
  color: #0c0e14;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* Collaboration — presence (compact count + hover popover) */
.collab-presence {
  position: relative;
  width: 100%;
}

.collab-presence-trigger {
  width: 100%;
  justify-content: center;
  padding: 8px 10px;
  font-size: 13px;
  cursor: pointer;
  transition:
    background 0.15s,
    border-color 0.15s,
    box-shadow 0.2s ease,
    transform 0.15s ease;
}

.collab-presence-trigger:hover {
  box-shadow: 0 1px 4px var(--color-hover-shadow);
}

.collab-presence:focus-within .collab-presence-trigger {
  border-color: var(--color-hover-border);
  box-shadow: 0 0 0 2px color-mix(in srgb, #22c55e 25%, transparent);
}

.collab-presence-live {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.22);
  animation: collab-presence-pulse 2.4s ease-in-out infinite;
  flex-shrink: 0;
}

html[data-theme='dark'] .collab-presence-live {
  background: #4ade80;
  box-shadow: 0 0 0 2px rgba(74, 222, 128, 0.2);
}

.collab-presence-live--idle {
  background: var(--color-muted);
  opacity: 0.45;
  animation: none;
  box-shadow: none;
}

@keyframes collab-presence-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.86);
  }
}

.collab-presence-icon {
  flex-shrink: 0;
  opacity: 0.85;
}

.collab-presence-trigger-text {
  font-variant-numeric: tabular-nums;
}

.collab-presence-popover {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 120;
  width: min(280px, 70vw);
  padding: 10px 0 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: 0 8px 24px var(--color-panel-shadow);
  animation: collab-popover-in 0.16s ease;
}

@keyframes collab-popover-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.collab-presence:hover .collab-presence-popover,
.collab-presence:focus-within .collab-presence-popover {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .collab-presence-live,
  .collab-presence-popover {
    animation: none;
  }
}

.collab-presence-popover-kicker {
  margin: 0 0 8px;
  padding: 0 12px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.collab-presence-popover-list {
  margin: 0;
  padding: 0;
  list-style: none;
  max-height: 240px;
  overflow-y: auto;
}

.collab-presence-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 12px;
}

.collab-presence-row:hover {
  background: var(--color-accent-soft);
}

.collab-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-text);
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
}

.collab-presence-row-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  font-size: 12px;
  line-height: 1.3;
}

.collab-presence-row-text strong {
  font-weight: 600;
  color: var(--color-text);
}

.collab-presence-row-page {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-muted);
  font-size: 11px;
}

.collab-presence-popover-empty {
  padding: 8px 12px 10px;
  font-size: 12px;
  color: var(--color-muted);
}

/* Collaboration — comments */
.comment-highlight {
  display: inline;
  background: rgba(250, 204, 21, 0.5);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
  cursor: pointer;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  scroll-margin-top: calc(var(--topbar-height) + 20px);
}

.comment-highlight:empty {
  display: none !important;
}

html[data-theme='dark'] .comment-highlight {
  background: rgba(234, 179, 8, 0.38);
  box-shadow: inset 0 -2px 0 rgba(234, 179, 8, 0.65);
}

.comment-highlight--active {
  background: rgba(250, 204, 21, 0.72);
  box-shadow: 0 0 0 2px rgba(250, 204, 21, 0.55);
}

html[data-theme='dark'] .comment-highlight--active {
  background: rgba(234, 179, 8, 0.55);
  box-shadow: 0 0 0 2px rgba(234, 179, 8, 0.7);
}

.comment-highlight--pulse {
  animation: comment-pulse 1.2s ease;
}

@keyframes comment-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(234, 179, 8, 0); }
  40% { box-shadow: 0 0 0 4px rgba(234, 179, 8, 0.45); }
}

.comment-popover {
  position: fixed;
  z-index: 250;
  transform: translateX(-50%);
}

.comment-compose {
  position: fixed;
  inset: 0;
  z-index: 260;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--color-overlay);
  backdrop-filter: blur(2px);
}

.comment-compose[hidden] {
  display: none !important;
}

.comment-compose-panel {
  width: min(480px, 96vw);
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-paper);
  box-shadow: 0 20px 48px var(--color-panel-shadow-lg);
}

.comment-compose-title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-heading);
}

.comment-compose-quote {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-left: 3px solid var(--color-border);
  background: var(--color-subtle-bg);
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.45;
}

.comment-compose-input {
  width: 100%;
  min-height: 96px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  font-size: 14px;
  line-height: 1.5;
  resize: vertical;
}

.comment-compose-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

.comment-panel {
  position: fixed;
  top: var(--topbar-height);
  right: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  width: min(340px, 92vw);
  height: calc(100vh - var(--topbar-height));
  border-left: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: -8px 0 24px var(--color-panel-shadow);
  transform: translateX(100%);
  transition: transform 0.2s ease;
}

.comment-panel--open {
  transform: translateX(0);
}

.comment-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
}

.comment-panel-title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-heading);
}

.comment-panel-close {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-muted);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

.comment-panel-close:hover {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.comment-panel-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--color-border);
}

.comment-filter-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-muted);
  cursor: pointer;
  user-select: none;
}

.comment-filter-label input {
  accent-color: var(--color-accent);
}

.comment-list {
  flex: 1;
  overflow-y: auto;
  margin: 0;
  padding: 12px;
  list-style: none;
}

.comment-empty {
  padding: 12px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.5;
}

.comment-empty--error {
  color: #f87171;
}

.comment-card--flash {
  animation: comment-pulse 1.2s ease;
}

.comment-card {
  padding: 12px;
  margin-bottom: 10px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-paper);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.comment-card:hover {
  border-color: var(--color-hover-border);
  box-shadow: 0 2px 8px var(--color-hover-shadow);
}

.comment-card--active {
  border-color: rgba(234, 179, 8, 0.65);
  box-shadow: 0 0 0 1px rgba(234, 179, 8, 0.35);
}

.comment-card-meta {
  margin: 0 0 8px;
  font-size: 12px;
  color: var(--color-muted);
}

.comment-card-meta strong {
  color: var(--color-text);
}

.comment-card-quote {
  margin: 0 0 8px;
  padding-left: 10px;
  border-left: 2px solid var(--color-border);
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.4;
}

.comment-card-body {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-prose);
}

.comment-thread {
  margin-bottom: 12px;
  list-style: none;
}

.comment-card--reply {
  margin-left: 12px;
  margin-bottom: 8px;
  padding: 10px;
  cursor: default;
}

.comment-card--reply:hover {
  box-shadow: none;
}

.comment-card--resolved,
.comment-card--archived {
  opacity: 0.88;
}

.comment-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 8px;
}

.comment-badge {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.comment-badge--resolved {
  background: rgba(34, 197, 94, 0.15);
  color: #16a34a;
}

html[data-theme='dark'] .comment-badge--resolved {
  color: #4ade80;
}

.comment-badge--archived {
  background: var(--color-accent-soft);
  color: var(--color-muted);
}

.comment-badge--orphan {
  background: rgba(249, 115, 22, 0.15);
  color: #ea580c;
}

html[data-theme='dark'] .comment-badge--orphan {
  color: #fb923c;
}

.comment-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.comment-action {
  padding: 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: transparent;
  color: var(--color-muted);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
}

.comment-action:hover {
  border-color: var(--color-hover-border);
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.comment-action--primary {
  color: var(--color-text);
  border-color: color-mix(in srgb, var(--timeline-accent, #9a7b4f) 45%, var(--color-border));
}

.comment-action--danger {
  color: #dc2626;
}

html[data-theme='dark'] .comment-action--danger {
  color: #f87171;
}

.comment-action--danger:hover {
  background: rgba(220, 38, 38, 0.1);
  border-color: rgba(220, 38, 38, 0.35);
}

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

.comment-reply-form {
  margin: 8px 0 0 12px;
}

.comment-reply-form[hidden] {
  display: none !important;
}

.comment-reply-input {
  width: 100%;
  min-height: 64px;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-paper);
  color: var(--color-text);
  font-family: inherit;
  font-size: 12px;
  line-height: 1.45;
  resize: vertical;
}

.comment-reply-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  margin-top: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-btn-primary-fg);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-muted);
}

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

.btn-secondary {
  background: var(--color-paper);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-subtle-bg);
}

.theme-toggle {
  flex-shrink: 0;
  padding: 8px 10px;
}

.theme-toggle-label {
  font-size: 13px;
  font-weight: 500;
}

.theme-toggle .icon-sun {
  display: none;
}

[data-theme='dark'] .theme-toggle .icon-moon {
  display: none;
}

[data-theme='dark'] .theme-toggle .icon-sun {
  display: block;
}

/* Layout */
.layout {
  display: flex;
  max-width: calc(var(--sidebar-width) + var(--a4-width) + 80px);
  margin: 0 auto;
  min-height: calc(100vh - var(--topbar-height));
  transition: max-width 0.2s ease;
}

.layout.nav-collapsed {
  max-width: calc(var(--a4-width) + 80px);
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: var(--topbar-height);
  height: calc(100vh - var(--topbar-height));
  overflow-y: auto;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.layout.nav-collapsed .sidebar {
  display: none;
}

.sidebar-inner {
  padding: 20px 16px 40px;
}

.sidebar-kicker {
  margin: 0 0 16px;
  padding: 0 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.nav-section {
  margin-bottom: 20px;
}

.nav-section-title {
  margin: 0 0 6px;
  padding: 0 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

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

.nav-link {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  color: var(--color-text);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
}

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

.nav-link.is-active {
  background: var(--color-accent-soft);
  color: var(--color-text);
  font-weight: 600;
}

.nav-link.is-featured {
  font-weight: 600;
}

.nav-link.is-featured.is-active {
  color: var(--color-text);
}

/* Main content — A4 sheet on screen */
.main {
  flex: 1;
  padding: 32px 24px 40px;
  min-width: 0;
}

.a4-sheet {
  max-width: var(--a4-width);
  margin: 0 auto;
  background: var(--color-paper);
  box-shadow: var(--shadow-sheet);
  border-radius: 2px;
  padding: 18mm 20mm 22mm;
  min-height: 297mm;
}

.doc-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--color-divider);
}

.doc-section {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.doc-meta {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-doc-meta-bg);
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--color-muted);
  line-height: 1.5;
}

.doc-meta-dates {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.doc-meta-sep {
  opacity: 0.5;
}

.doc-meta-note {
  margin: 8px 0 0;
  color: var(--color-text);
}

/* In-page table of contents — matches changelog timeline styling */
.doc-toc {
  --timeline-accent: #9a7b4f;
  --timeline-accent-soft: rgba(154, 123, 79, 0.14);
  --timeline-accent-glow: rgba(154, 123, 79, 0.35);
  margin: 0 0 2rem;
  padding: 1.15rem 1.25rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: linear-gradient(145deg, var(--color-subtle-bg) 0%, var(--color-paper) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  font-family: var(--font-sans);
}

html[data-theme='dark'] .doc-toc {
  --timeline-accent: #c9a962;
  --timeline-accent-soft: rgba(201, 169, 98, 0.12);
  --timeline-accent-glow: rgba(201, 169, 98, 0.4);
}

.doc-toc-header {
  display: block;
  margin: 0 0 0.85rem;
  padding: 0 0 0.85rem;
  border-bottom: 1px solid var(--color-divider);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.doc-toc-header::-webkit-details-marker {
  display: none;
}

.doc-toc-header-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem 1rem;
}

.doc-toc-heading {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-heading);
}

.doc-toc-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--timeline-accent);
  background: var(--timeline-accent-soft);
  border: 1px solid color-mix(in srgb, var(--timeline-accent) 35%, transparent);
}

.doc-toc-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--timeline-accent);
  box-shadow: 0 0 0 3px var(--timeline-accent-soft);
}

.doc-toc-header::after {
  display: block;
  margin-top: 0.65rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  opacity: 0.85;
}

.doc-toc:not([open]) .doc-toc-header {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.doc-toc:not([open]) .doc-toc-header::after {
  content: 'Tap to expand';
}

.doc-toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  max-height: min(42vh, 340px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.doc-toc:not([open]) .doc-toc-list {
  display: none;
}

.doc-toc-item {
  position: relative;
}

.doc-toc-item--h3 {
  padding-left: 0.75rem;
}

.doc-toc-item--h4 {
  padding-left: 1.35rem;
}

.doc-toc-item a {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.45rem 0.35rem;
  border-radius: 6px;
  color: var(--color-muted);
  font-size: 0.8125rem;
  line-height: 1.45;
  text-decoration: none;
  transition:
    color 0.15s,
    background 0.15s;
}

.doc-toc-item a::before {
  content: '';
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  margin-top: 0.35rem;
  border-radius: 50%;
  background: var(--color-border);
  transition:
    background 0.15s,
    box-shadow 0.15s,
    transform 0.15s;
}

.doc-toc-item a:hover {
  color: var(--color-text);
  background: var(--timeline-accent-soft);
}

.doc-toc-item a:hover::before {
  background: var(--timeline-accent);
  box-shadow: 0 0 0 2px var(--timeline-accent-soft);
}

.doc-toc-item a.is-active {
  color: var(--color-heading);
  font-weight: 600;
  background: var(--timeline-accent-soft);
}

.doc-toc-item a.is-active::before {
  background: var(--timeline-accent);
  box-shadow: 0 0 0 3px var(--timeline-accent-soft);
  animation: changelog-pulse 2.4s ease-in-out infinite;
}

@media (min-width: 961px) {
  .doc-toc {
    position: sticky;
    top: calc(var(--topbar-height) + 12px);
    z-index: 1;
  }

  .doc-toc[open] .doc-toc-header::after {
    display: none;
  }

  .doc-toc:not([open]) .doc-toc-header::after {
    content: 'Jump to section';
  }
}

@media (max-width: 960px) {
  .doc-toc {
    padding: 1rem 0.875rem 0.75rem;
  }

  .doc-toc-header::after {
    content: 'Tap to expand';
  }
}

@media (prefers-reduced-motion: reduce) {
  .doc-toc-item a.is-active::before {
    animation: none;
  }
}

@media print {
  .doc-toc {
    display: none !important;
  }
}

.doc-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-heading);
}

/* Prose */
.prose {
  font-family: var(--font-serif);
  font-size: 11pt;
  line-height: 1.65;
  color: var(--color-prose);
}

.prose > :first-child {
  margin-top: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-sans);
  color: var(--color-heading);
  line-height: 1.25;
  scroll-margin-top: calc(var(--topbar-height) + 16px);
}

.prose h1 {
  font-size: 22px;
  margin: 2em 0 0.75em;
}

.prose h2 {
  font-size: 17px;
  margin: 1.75em 0 0.6em;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-divider);
}

.prose h3 {
  font-size: 14px;
  margin: 1.4em 0 0.5em;
}

.prose h4 {
  font-size: 13px;
  margin: 1.2em 0 0.4em;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote {
  margin: 0 0 1em;
}

.prose ul,
.prose ol {
  padding-left: 1.4em;
}

.prose li {
  margin-bottom: 0.35em;
}

.prose li > ul,
.prose li > ol {
  margin-top: 0.35em;
  margin-bottom: 0;
}

.prose a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose a:hover {
  color: var(--color-link-hover);
}

.prose hr {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin: 2em 0;
}

.prose strong {
  font-weight: 600;
  color: var(--color-heading);
}

.prose .callout {
  margin: 1.25em 0;
  padding: 14px 18px;
  border-left: 4px solid var(--color-accent);
  background: var(--color-subtle-bg);
  border-radius: 0 6px 6px 0;
  font-family: var(--font-sans);
  font-size: 10pt;
}

.prose .callout p:last-child {
  margin-bottom: 0;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 1.25em 0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 9.5pt;
  line-height: 1.4;
}

.prose th,
.prose td {
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
}

.prose th {
  background: var(--color-subtle-bg);
  font-weight: 600;
  color: var(--color-heading);
  white-space: nowrap;
}

.prose tr:last-child td {
  border-bottom: none;
}

.prose tr:nth-child(even) td {
  background: var(--color-subtle-bg-2);
}

/* Code */
.prose .code-block {
  margin: 1.25em 0;
  padding: 14px 16px;
  background: var(--color-code-bg);
  color: var(--color-code-fg);
  border-radius: 6px;
  overflow-x: auto;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 9pt;
  line-height: 1.45;
}

.prose .code-block code {
  background: none;
  padding: 0;
  color: inherit;
}

.prose :not(pre) > code {
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.88em;
  background: var(--color-code-inline-bg);
  padding: 2px 5px;
  border-radius: 4px;
  color: var(--color-code-inline-fg);
}

/* Mermaid diagrams */
.diagram {
  position: relative;
  margin: 1.5em 0;
  padding: 16px;
  background: var(--color-diagram-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow-x: auto;
  text-align: center;
}

.diagram-variant {
  display: none;
}

html[data-theme='light'] .diagram-variant--light,
html[data-theme='dark'] .diagram-variant--dark {
  display: block;
}

.diagram svg {
  max-width: 100%;
  height: auto;
}

.diagram--zoomable {
  cursor: zoom-in;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.diagram--zoomable:hover {
  border-color: var(--color-hover-border);
  box-shadow: 0 2px 8px var(--color-hover-shadow);
}

.diagram--zoomable:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.diagram-expand-hint {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--color-diagram-hint-border);
  background: var(--color-diagram-hint-bg);
  color: var(--color-diagram-hint-fg);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  pointer-events: none;
}

/* Diagram lightbox */
.diagram-lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.diagram-lightbox[hidden] {
  display: none !important;
}

.diagram-lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: var(--color-overlay-heavy);
  backdrop-filter: blur(3px);
}

.diagram-lightbox-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(1200px, 96vw);
  height: min(88vh, 900px);
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  box-shadow: 0 24px 64px var(--color-panel-shadow-lg);
  overflow: hidden;
}

.diagram-lightbox-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.diagram-tool {
  min-width: 36px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-paper);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.diagram-tool:hover {
  background: var(--color-accent-soft);
}

.diagram-tool--close {
  margin-left: auto;
}

.diagram-zoom-label {
  min-width: 48px;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-muted);
}

.diagram-lightbox-hint {
  margin: 0;
  padding: 6px 12px;
  font-size: 11px;
  color: var(--color-muted);
  background: var(--color-subtle-bg-2);
  border-bottom: 1px solid var(--color-border);
}

.diagram-lightbox-viewport {
  flex: 1;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-diagram-viewport);
  cursor: grab;
  touch-action: none;
}

.diagram-lightbox-viewport.is-dragging {
  cursor: grabbing;
}

.diagram-lightbox-stage {
  transform-origin: center center;
  will-change: transform;
}

.diagram-lightbox-stage svg {
  display: block;
  max-width: none !important;
  shape-rendering: geometricPrecision;
  text-rendering: geometricPrecision;
}

.diagram-lightbox-stage svg foreignObject {
  overflow: visible;
}

.diagram-lightbox-stage svg foreignObject div,
.diagram-lightbox-stage svg foreignObject span,
.diagram-lightbox-stage svg foreignObject p {
  font-family: Inter, system-ui, sans-serif !important;
}

/* Pager — inline at end of document */
.doc-pager {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.doc-pager-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.pager-link,
.pager-slot {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  min-width: 0;
  height: 72px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-paper);
  box-sizing: border-box;
}

.pager-link {
  text-decoration: none;
  color: var(--color-text);
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.pager-link:hover {
  border-color: var(--color-hover-border);
  background: var(--color-accent-soft);
  box-shadow: 0 2px 8px var(--color-hover-shadow);
}

.pager-slot--empty {
  visibility: hidden;
  pointer-events: none;
}

.pager-prev {
  text-align: left;
  align-items: flex-start;
}

.pager-next {
  text-align: right;
  align-items: flex-end;
}

.pager-label {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  line-height: 1;
}

.pager-title {
  width: 100%;
  min-width: 0;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.pager-next .pager-title {
  text-align: right;
}

.doc-footer {
  margin-top: 32px;
  padding-top: 12px;
  border-top: 1px solid var(--color-divider);
  font-family: var(--font-sans);
  font-size: 9pt;
  color: var(--color-muted);
  text-align: center;
}

.print-only {
  display: none;
}

.print-hint {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-code-bg);
  color: var(--color-code-fg);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  z-index: 200;
}

/* Auth page */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, #eff6ff 0%, #f0fdf4 100%);
  padding: 24px;
}

.auth-card {
  max-width: 420px;
  width: 100%;
  background: white;
  border-radius: 12px;
  padding: 40px 36px;
  box-shadow: var(--shadow-sheet);
  text-align: center;
}

.auth-card h1 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 24px;
}

.auth-card p {
  margin: 0 0 24px;
  color: var(--color-muted);
  font-size: 14px;
}

.auth-error {
  background: #fef2f2;
  color: #b91c1c;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
}

.google-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 20px;
  background: white;
  border: 1px solid #dadce0;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: #3c4043;
  text-decoration: none;
  transition: box-shadow 0.15s;
}

.google-btn:hover {
  box-shadow: 0 1px 3px rgba(60, 64, 67, 0.2);
}

.user-chip {
  font-size: 13px;
  color: var(--color-muted);
  margin-right: 8px;
}

.user-chip strong {
  color: var(--color-text);
}

/* Search overlay */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 16px 16px;
  background: var(--color-overlay);
  backdrop-filter: blur(4px);
}

.search-overlay[hidden] {
  display: none !important;
}

.search-dialog {
  width: min(640px, 100%);
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  box-shadow: 0 24px 64px var(--color-panel-shadow);
  overflow: hidden;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
}

.search-input {
  flex: 1;
  border: none;
  background: transparent;
  font: inherit;
  font-size: 16px;
  color: var(--color-text);
  outline: none;
}

.search-input::placeholder {
  color: var(--color-muted);
}

.search-stats {
  margin: 0;
  padding: 8px 16px 0;
  font-size: 11px;
  color: var(--color-muted);
}

.search-results {
  list-style: none;
  margin: 0;
  padding: 8px;
  max-height: min(50vh, 420px);
  overflow-y: auto;
}

.search-result {
  display: block;
  width: 100%;
  padding: 10px 12px;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  text-align: left;
  font: inherit;
  cursor: pointer;
  color: inherit;
}

.search-result:hover,
.search-result.is-active {
  background: var(--color-accent-soft);
}

.search-result-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.search-result-meta {
  display: block;
  font-size: 11px;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.search-result-snippet {
  display: block;
  font-size: 12px;
  line-height: 1.45;
  color: var(--color-muted);
}

.search-result-snippet mark {
  background: var(--color-search-mark);
  color: var(--color-heading);
  padding: 0 1px;
  border-radius: 2px;
}

.search-empty {
  padding: 16px 12px;
  font-size: 13px;
  color: var(--color-muted);
}

.search-hint {
  margin: 0;
  padding: 8px 16px 12px;
  font-size: 11px;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
}

/* Draft labels */
.draft-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--color-draft-bg);
  color: var(--color-draft-fg);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  vertical-align: middle;
}

.draft-badge--inline {
  margin-left: 0;
  font-size: 10px;
}

.nav-link.is-draft {
  color: var(--color-muted);
}

.nav-link.is-draft.is-active {
  color: var(--color-text);
}

.draft-banner {
  margin: 0 0 20px;
  padding: 12px 14px;
  border: 1px solid var(--color-draft-banner-border);
  border-radius: var(--radius);
  background: var(--color-draft-banner-bg);
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-draft-banner-fg);
}

.draft-banner a {
  color: var(--color-draft-fg);
  font-weight: 600;
}

.draft-banner strong {
  font-weight: 600;
}

@media print {
  .draft-banner {
    border-color: #ccc;
    background: #f9f9f9;
    color: #333;
  }
}

/* Tablet / mobile — stack search under brand + toolbar */
@media (max-width: 1100px) {
  .top-bar-inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 10px 12px;
    grid-template-areas: none;
  }

  .top-bar-mobile-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    width: 100%;
    min-width: 0;
  }

  .brand {
    flex: 1 1 auto;
    min-width: 0;
    grid-area: unset;
  }

  .search-trigger {
    grid-area: unset;
  }

  .top-bar-end {
    grid-area: unset;
  }

  .brand-meta--full {
    display: none;
  }

  .brand-meta--short {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .top-bar-end {
    flex: 0 0 auto;
    max-width: 100%;
  }

  .search-trigger {
    width: 100%;
    flex: 0 0 auto;
  }

  .search-trigger-text--long {
    display: none;
  }

  .search-trigger-text--short {
    display: inline;
  }

  .collab-presence-slot,
  body.collab-active .collab-presence-slot {
    display: none;
  }

  .top-actions .btn-label,
  .theme-toggle-label {
    display: none;
  }

  .top-actions .btn,
  .theme-toggle,
  .comment-toggle {
    padding: 8px 10px;
  }

  .top-actions {
    gap: 4px;
  }
}

/* Mobile — sidebar drawer */
@media (max-width: 960px) {
  .brand-meta--short {
    display: none;
  }

  .search-kbd {
    display: none;
  }

  .layout {
    flex-direction: column;
    max-width: none;
  }

  .layout.nav-collapsed {
    max-width: none;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: var(--topbar-height);
    width: min(320px, 85vw);
    height: calc(100vh - var(--topbar-height));
    transform: translateX(0);
    transition: transform 0.2s ease;
    z-index: 90;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.1);
    display: block;
  }

  .layout.nav-collapsed .sidebar {
    display: block;
    transform: translateX(-100%);
    box-shadow: none;
  }

  .layout:not(.nav-collapsed)::before {
    content: '';
    position: fixed;
    inset: var(--topbar-height) 0 0 0;
    background: rgba(28, 25, 23, 0.35);
    z-index: 80;
  }

  .main {
    padding: 16px 8px 28px;
  }

  .a4-sheet {
    max-width: 100%;
    padding: 20px 16px 24px;
    min-height: auto;
  }

  .changelog-timeline {
    padding: 1rem 0.875rem 0.875rem;
  }

  .doc-meta {
    padding: 10px 12px;
  }

  .doc-pager-inner {
    gap: 8px;
  }

  .pager-link,
  .pager-slot {
    height: 68px;
    padding: 8px 10px;
  }

  .pager-title {
    font-size: 12px;
    -webkit-line-clamp: 2;
  }
}

/* Phone */
@media (max-width: 480px) {
  .main {
    padding: 8px 0 20px;
  }

  .a4-sheet {
    border-radius: 0;
    box-shadow: none;
    padding: 16px 12px 20px;
  }

  .changelog-timeline {
    padding: 0.875rem 0.75rem;
    border-radius: 8px;
  }

  .doc-title {
    font-size: 24px;
  }

  .top-bar-inner {
    gap: 8px;
    padding: 8px 10px;
  }

  .top-bar-mobile-row {
    gap: 6px;
  }

  .brand-wordmark {
    font-size: 16px;
  }

  .top-actions {
    gap: 2px;
  }

  .top-actions .btn,
  .theme-toggle,
  .comment-toggle {
    padding: 8px;
    min-width: 36px;
    justify-content: center;
  }

  .comment-count {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 14px;
    height: 14px;
    padding: 0 3px;
    margin-left: 0;
    font-size: 9px;
  }

  .comment-toggle {
    position: relative;
  }

  .comment-panel {
    width: min(100vw, 340px);
  }

  .comment-action {
    min-height: 32px;
    padding: 6px 10px;
    font-size: 12px;
  }

  .comment-card {
    cursor: default;
  }
}

/* Changelog release timeline — build-time from registry.json */
.changelog-timeline {
  --timeline-accent: #9a7b4f;
  --timeline-accent-soft: rgba(154, 123, 79, 0.14);
  --timeline-accent-glow: rgba(154, 123, 79, 0.35);
  margin: 0 0 2.25rem;
  padding: 1.35rem 1.25rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background:
    linear-gradient(145deg, var(--color-subtle-bg) 0%, var(--color-paper) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

html[data-theme='dark'] .changelog-timeline {
  --timeline-accent: #c9a962;
  --timeline-accent-soft: rgba(201, 169, 98, 0.12);
  --timeline-accent-glow: rgba(201, 169, 98, 0.4);
}

.changelog-timeline-header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1.15rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--color-divider);
}

.changelog-timeline-header-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
}

.changelog-timeline-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-heading);
}

.changelog-timeline-live {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--timeline-accent);
  background: var(--timeline-accent-soft);
  border: 1px solid color-mix(in srgb, var(--timeline-accent) 35%, transparent);
}

.changelog-timeline-live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--timeline-accent);
  box-shadow: 0 0 0 3px var(--timeline-accent-soft);
  animation: changelog-pulse 2.4s ease-in-out infinite;
}

@keyframes changelog-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.65; transform: scale(0.88); }
}

@keyframes changelog-ring {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.18); opacity: 0.35; }
}

.changelog-timeline-hint {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

/* Depth control — scale how many releases fit the chart width (max 20) */
.changelog-chart-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-bottom: 1rem;
}

.changelog-chart-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  flex: 1;
  min-width: min(100%, 14rem);
}

.changelog-chart-controls-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.changelog-chart-controls-inner {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem 0.75rem;
  min-width: min(100%, 16rem);
}

.changelog-depth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-paper);
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.changelog-depth-btn:hover {
  border-color: var(--timeline-accent);
  color: var(--timeline-accent);
}

.changelog-depth-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.changelog-depth-range {
  flex: 1;
  min-width: 6rem;
  max-width: 12rem;
  height: 4px;
  margin: 0;
  accent-color: var(--timeline-accent);
  cursor: pointer;
}

.changelog-depth-readout {
  min-width: 7.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-prose);
  text-align: right;
}

.changelog-jump {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: min(100%, 15rem);
}

.changelog-jump-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.changelog-jump-inner {
  display: flex;
  gap: 0.4rem;
}

.changelog-jump-input {
  flex: 1;
  min-width: 0;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-paper);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
}

.changelog-jump-input:focus {
  outline: 2px solid var(--timeline-accent);
  outline-offset: 1px;
  border-color: var(--timeline-accent);
}

.changelog-jump-input--error {
  border-color: #dc2626;
  animation: changelog-shake 0.35s ease;
}

@keyframes changelog-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.changelog-jump-btn {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--timeline-accent);
  color: var(--color-paper);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

html[data-theme='light'] .changelog-jump-btn {
  color: #fff;
}

.changelog-jump-btn:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.changelog-list-pagination {
  margin: 1.5rem 0 1.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-subtle-bg);
}

.changelog-list-pagination-summary {
  margin: 0 0 0.65rem;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.changelog-list-pagination-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.changelog-list-pagination-indicator {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-prose);
}

.changelog-page-btn {
  font-size: 0.8125rem;
  padding: 0.35rem 0.75rem;
}

.changelog-release-entry[hidden] {
  display: none !important;
}

/* Chart viewport — no overflow clip (fixes tooltip bug) */
.changelog-chart-viewport {
  position: relative;
  overflow: visible;
  padding: 0.5rem 0 0.25rem;
}

.changelog-chart-track {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0;
  min-height: 7.5rem;
  transition: opacity 0.2s ease;
}

.changelog-chart-track.is-updating {
  opacity: 0.72;
}

.changelog-chart-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 1.125rem;
  height: 2px;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-border) 80%, transparent) 0%,
    color-mix(in srgb, var(--timeline-accent) 50%, var(--color-border)) 70%,
    var(--timeline-accent) 100%
  );
  border-radius: 1px;
  pointer-events: none;
  z-index: 0;
}

.changelog-chart-area {
  position: absolute;
  left: 0;
  right: 0;
  top: 1.125rem;
  height: 3.5rem;
  background: linear-gradient(
    180deg,
    var(--timeline-accent-soft) 0%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

.changelog-chart-item {
  position: relative;
  z-index: 1;
  flex: 1 1 0;
  min-width: 0;
  padding: 0 0.25rem;
  text-align: center;
  transition: flex-basis 0.25s ease, opacity 0.2s ease;
}

.changelog-chart-item.is-active .changelog-chart-dot-core {
  transform: scale(1.15);
  background: var(--timeline-accent);
  box-shadow: 0 0 0 3px var(--timeline-accent-soft), 0 0 14px var(--timeline-accent-glow);
}

.changelog-chart-item--latest .changelog-chart-version {
  color: var(--timeline-accent);
}

.changelog-chart-dot {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin: 0 auto;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.changelog-chart-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid transparent;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.changelog-chart-item--latest .changelog-chart-ring {
  border-color: color-mix(in srgb, var(--timeline-accent) 45%, transparent);
  animation: changelog-ring 2.4s ease-in-out infinite;
}

.changelog-chart-dot-core {
  display: block;
  width: 0.5625rem;
  height: 0.5625rem;
  border-radius: 50%;
  background: var(--color-muted);
  border: 2px solid var(--color-paper);
  box-shadow: 0 0 0 1px var(--color-border);
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.changelog-chart-item--latest .changelog-chart-dot-core {
  width: 0.6875rem;
  height: 0.6875rem;
  background: var(--timeline-accent);
  box-shadow: 0 0 0 2px var(--timeline-accent-soft), 0 0 10px var(--timeline-accent-glow);
}

.changelog-chart-dot:hover .changelog-chart-dot-core,
.changelog-chart-dot:focus-visible .changelog-chart-dot-core {
  background: var(--timeline-accent);
}

.changelog-chart-dot:focus-visible {
  outline: 2px solid var(--timeline-accent);
  outline-offset: 2px;
}

.changelog-chart-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.12rem;
  margin-top: 0.55rem;
}

.changelog-chart-current {
  display: inline-block;
  margin-bottom: 0.08rem;
  padding: 0.08rem 0.35rem;
  border-radius: 3px;
  font-size: 0.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-paper);
  background: var(--timeline-accent);
}

.changelog-chart-version {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(0.6875rem, 1.8vw, 0.875rem);
  color: var(--color-heading);
  white-space: nowrap;
}

.changelog-chart-date {
  font-size: clamp(0.5625rem, 1.4vw, 0.6875rem);
  color: var(--color-muted);
  white-space: nowrap;
}

.changelog-chart-label {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 0.15rem;
  max-width: 100%;
  padding: 0 0.15rem;
  font-size: clamp(0.5625rem, 1.3vw, 0.625rem);
  line-height: 1.35;
  color: var(--color-prose);
  opacity: 0.88;
}

/* Detail panel — always in flow, never clipped */
.changelog-detail {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-paper);
  box-shadow: 0 8px 28px var(--color-panel-shadow);
  min-height: 5.5rem;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.changelog-detail.is-fading {
  opacity: 0.55;
  transform: translateY(2px);
}

.changelog-detail-empty {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
  text-align: center;
  padding: 0.75rem 0;
}

.changelog-tip-header {
  margin: 0 0 0.5rem;
}

.changelog-tip-version {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-heading);
}

.changelog-tip-date {
  margin: 0.2rem 0 0;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--timeline-accent);
}

.changelog-tip-summary {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text);
}

.changelog-tip-divider {
  height: 1px;
  margin: 0.75rem 0;
  background: var(--color-divider);
}

.changelog-tip-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: 0.55rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.changelog-tip-list li {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  margin: 0;
  padding: 0;
}

.changelog-tip-label {
  font-size: 0.5625rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.changelog-tip-text {
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--color-prose);
}

@media (max-width: 640px) {
  .changelog-chart-controls-inner {
    justify-content: stretch;
  }

  .changelog-depth-readout {
    width: 100%;
    text-align: left;
  }

  .changelog-tip-list {
    grid-template-columns: 1fr;
  }

  .changelog-jump-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .changelog-jump-btn {
    width: 100%;
  }
}

@media print {
  .print-only {
    display: block;
  }
}