/* LogosArchive — App Styles v4
   Light mode default. Dark mode via [data-theme="dark"] on <html>.
   Heading font (Jost) switches to JetBrains Mono in dark mode.
   Body: Lora. Display/wordmark: Cormorant Garamond italic.
   Requires tokens.css to be loaded first. */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body {
  font-family: var(--font-heading);
  background: var(--color-page);
  color: var(--color-text-primary);
  line-height: var(--leading-normal);
  overflow-x: hidden;
  max-width: 100%;
}

/* ── Boot screen ── */
.boot-screen {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: var(--color-page);
}
.boot-wordmark {
  font-family: var(--font-heading);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-text-primary);
  opacity: 0;
  animation: fadeIn 0.5s 0.1s ease forwards;
}
.boot-wordmark em {
  font-style: italic;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1rem;
  color: var(--color-accent);
  letter-spacing: 0;
  text-transform: lowercase;
}
@keyframes fadeIn { to { opacity: 1; } }

/* ── App shell grid ── */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  min-height: 100vh;
}
.app-shell > * { min-width: 0; }

/* ── Header ── */
.app-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  background: var(--color-header-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-default);
  gap: var(--space-8);
  position: sticky;
  top: 0;
  z-index: 100;
}

/* Wordmark — "logos" in heading font, "Archive" italic accent */
.wordmark {
  display: flex; flex-direction: column;
  text-decoration: none; flex-shrink: 0;
}
.wm-main {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  color: var(--color-text-primary);
  line-height: 1;
}
/* Light mode: Cormorant Garamond italic for "Archive" */
.wm-main em {
  font-style: italic;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.05em;
  color: var(--color-accent);
  letter-spacing: 0;
  text-transform: lowercase;
}
/* Dark mode: JetBrains Mono for "Archive" (via --font-heading = JetBrains Mono) */
[data-theme="dark"] .wm-main em {
  font-family: var(--font-heading);
  font-style: normal;
  font-size: inherit;
  letter-spacing: inherit;
}
.wm-sub {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: lowercase;
  color: var(--color-text-tertiary);
  font-weight: 300;
  margin-top: 3px;
}

/* Header search */
.header-search {
  flex: 1;
  max-width: 400px;
  position: relative;
}
.header-search input {
  width: 100%;
  height: 34px;
  padding: 0 var(--space-4) 0 34px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  outline: none;
  transition: border-color 150ms;
}
.header-search input:focus {
  border-color: var(--color-accent);
  background: var(--color-surface);
}
.header-search input::placeholder {
  color: var(--color-text-tertiary);
  letter-spacing: 0;
}
.search-icon {
  position: absolute; left: 11px; top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}
.header-right {
  margin-left: auto;
  display: flex; align-items: center;
  gap: var(--space-5);
}
.header-link {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 120ms;
  cursor: pointer;
  background: none; border: none; padding: 0;
}
.header-link:hover { color: var(--color-text-primary); }
.header-div { width: 1px; height: 14px; background: var(--color-border-default); }

/* ── Sidebar ── */
.app-sidebar {
  border-right: 1px solid var(--color-border-default);
  background: var(--color-page);
  padding: var(--space-8) 0;
  overflow-y: auto;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
}
.sb-section { padding: 0 var(--space-5); margin-bottom: var(--space-8); }
.sb-label {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 400;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}
.sb-stat {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 300;
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
  margin-bottom: 4px;
}
.sb-stat-sub {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-text-tertiary);
  text-transform: lowercase;
}
.sb-divider {
  height: 1px;
  background: var(--color-border-default);
  margin: 0 var(--space-5) var(--space-6);
}
.nav-list { list-style: none; }
.nav-item a {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-text-tertiary);
  text-decoration: none;
  border-left: 1.5px solid transparent;
  transition: all 120ms;
  cursor: pointer;
}
.nav-item a:hover {
  color: var(--color-text-primary);
  background: var(--color-surface);
}
.nav-item a.active {
  color: var(--color-accent);
  background: transparent;
  border-left-color: var(--color-accent-dim);
  font-weight: 400;
}
.nav-count {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
}
.pip {
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: var(--radius-full);
  margin-right: 8px;
  vertical-align: 1px;
  flex-shrink: 0;
}

/* ── Main content area ── */
.app-main { background: var(--color-page); overflow-y: auto; }

/* ── Hero ── */
.home-hero {
  padding: var(--space-20) var(--space-12) var(--space-12);
  border-bottom: 1px solid var(--color-border-default);
  max-width: 820px;
}
.hero-label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-5);
}
.hero-title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 200;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-5);
}
.hero-title em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  color: var(--color-accent);
  letter-spacing: 0;
}
.hero-body {
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-loose);
  max-width: 520px;
  margin-bottom: var(--space-10);
}

/* ── AI Bar (homepage) ── */
.ai-bar {
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  max-width: 640px;
  overflow: hidden;
  margin-bottom: var(--space-5);
}
.ai-top {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-default);
}
.ai-eyebrow {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  display: flex; align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.ai-pulse {
  width: 5px; height: 5px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  animation: pulse 2.5s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }
.ai-promise {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  line-height: var(--leading-normal);
}
.ai-input {
  flex: 1; min-width: 0;
  border: none; background: none; outline: none;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}
.ai-input::placeholder { color: var(--color-text-tertiary); font-style: normal; }
.ai-bottom {
  display: flex;
  flex-direction: column;
  background: var(--color-page);
}
.ai-bottom .chips {
  padding: var(--space-3) var(--space-5);
}
.ai-input-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-surface);
}
.ai-send {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-accent);
  background: none; border: none; cursor: pointer;
  transition: color 120ms;
  flex-shrink: 0;
}
.ai-send:hover { color: var(--color-text-primary); }
.ai-send--btn {
  background: var(--color-accent);
  color: var(--color-page);
  border-radius: var(--radius-full);
  padding: 6px 18px;
  font-weight: 400;
  transition: background 120ms;
}
.ai-send--btn:hover { background: var(--color-accent-dim); color: var(--color-page); }
.chips { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.chip {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  background: var(--color-page);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  padding: 5px var(--space-4);
  cursor: pointer;
  transition: all 120ms;
  white-space: nowrap;
}
.chip:hover {
  border-color: var(--color-accent-dim);
  color: var(--color-accent);
  background: var(--color-page);
}

/* AI response panel (homepage) */
.ai-response {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-surface);
}
.ai-response-text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  line-height: var(--leading-relaxed);
}
.ai-error {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  color: #e57373;
}

/* ── Grid section ── */
.grid-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-8) var(--space-12) var(--space-5);
}
.grid-label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}
.grid-count {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}
.sort-options {
  display: flex; gap: var(--space-2);
}
.sort-btn {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  background: none; border: none; cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  transition: all 120ms;
}
.sort-btn:hover { color: var(--color-text-primary); }
.sort-btn.active { color: var(--color-accent); background: transparent; }

/* ── Document grid ── */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border-default);
  border-top: 1px solid var(--color-border-default);
  margin: 0 var(--space-12) var(--space-20);
}
.doc-card {
  background: var(--color-raised);
  padding: var(--space-6);
  text-decoration: none;
  color: inherit;
  display: flex; flex-direction: column;
  gap: var(--space-4);
  cursor: pointer;
  transition: background 120ms;
  min-height: 220px;
}
.doc-card:hover { background: var(--color-surface); }
.doc-card-top {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--space-3);
}
.doc-date {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  padding-top: 1px;
  white-space: nowrap;
}
.badge {
  font-family: var(--font-heading);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
/* Category badges — colored in light, muted in dark (via --cat-* token overrides) */
.b-nt  { background: var(--cat-nt-bg);  color: var(--cat-nt);  border: 1px solid var(--cat-nt-border); }
.b-apo { background: var(--cat-apo-bg); color: var(--cat-apo); border: 1px solid var(--cat-apo-border); }
.b-gno { background: var(--cat-gno-bg); color: var(--cat-gno); border: 1px solid var(--cat-gno-border); }
.b-fat { background: var(--cat-fat-bg); color: var(--cat-fat); border: 1px solid var(--cat-fat-border); }
.b-oth { background: var(--cat-oth-bg); color: var(--cat-oth); border: 1px solid var(--cat-oth-border); }
.b-stj { background: var(--cat-stj-bg); color: var(--cat-stj); border: 1px solid var(--cat-stj-border); }
.b-grb { background: var(--cat-grb-bg); color: var(--cat-grb); border: 1px solid var(--cat-grb-border); }

/* Feature 1: hypothetical/lost/fragmentary badge */
.b-hyp {
  background: transparent;
  color: var(--color-text-tertiary);
  border: 1px dashed var(--color-border-default);
  font-style: italic;
}

/* Feature 1: card badge stack */
.doc-card-badges {
  display: flex; flex-direction: column; align-items: flex-end; gap: 4px;
}

.card-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
  flex: 1;
}
.card-summary {
  font-family: var(--font-body);
  font-size: .875rem;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-foot {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-default);
}

/* ── Empty states ── */
.empty-state {
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
  padding: 72px 32px;
  gap: var(--space-4);
  grid-column: 1 / -1;
}
.empty-title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 300;
  color: var(--color-text-primary);
}
.empty-body {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 420px;
}
.empty-body code {
  background: var(--color-surface);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--color-accent);
}

/* ════════════════════════════════════════════════════════════════
   DOCUMENT PAGE — book layout.
   Cormorant Garamond for the title. Lora for body. Jost for labels.
   Centered title block, narrow body column, sticky aside.
   ════════════════════════════════════════════════════════════════ */

/* ── Document page ── */
.doc-page {
  min-height: 100vh;
  background: var(--color-page);
  color: var(--color-text-primary);
}

/* Two-column wrapper: content col (1fr) + aside (280px) */
.doc-book {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-10);
  max-width: 900px;
  padding: var(--space-10) var(--space-12);
  align-items: start;
}

/* Left column */
.doc-book-main { min-width: 0; }

/* Breadcrumb — centered */
.breadcrumb {
  display: flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: lowercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}
.breadcrumb a {
  color: var(--color-text-secondary); text-decoration: none;
  cursor: pointer; transition: color 120ms;
}
.breadcrumb a:hover { color: var(--color-accent); }

/* Title — Cormorant Garamond, large, centered */
.doc-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  text-align: center;
}

/* Metadata row — centered */
.doc-meta {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-4); flex-wrap: wrap;
  margin-bottom: 0;
}
.meta-item {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  display: flex; align-items: center; gap: var(--space-2);
}
.meta-sep { width: 1px; height: 12px; background: var(--color-border-default); }

/* ⁕ ornamental divider */
.doc-divider {
  font-size: 18px;
  color: var(--color-text-tertiary);
  text-align: center;
  margin: var(--space-5) auto;
  display: block;
  line-height: 1;
  user-select: none;
}

/* Pull quote — centered, no left border, Lora italic */
.pull {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 480px;
  margin: 0 auto var(--space-8);
  text-align: center;
  border: none;
  padding: 0;
}

/* Translation block — centered, stacked pills */
.trans-cta-row {
  max-width: 320px;
  margin: 0 auto var(--space-8);
}
.trans-label {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  text-align: center;
}
.trans-pills {
  display: flex; flex-direction: column;
  gap: var(--space-3);
  align-items: stretch;
}

/* Body section */
.doc-body-section { margin-top: var(--space-8); }

.sec-head {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border-default);
}

/* Body text — narrow, max 520px */
.body-text {
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--color-text-primary);
  max-width: 520px;
  overflow-wrap: break-word;
}
.body-text p { margin-bottom: var(--space-5); }
.body-text p:last-child { margin-bottom: 0; }

/* Related wrappers — mobile shows below content, desktop in aside */
.doc-related-mobile { display: none; }
.doc-related-desktop { display: block; }

/* Related section inside aside: strip full-width padding, single column */
.doc-related-desktop .related-section {
  padding: var(--space-6) 0 0;
  border-top: none;
  background: transparent;
}
.doc-related-desktop .related-section-head {
  padding: 0 0 var(--space-4);
}
.doc-related-desktop .related-grid {
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

/* ── Inline AI bar (doc page) — reading zone ── */
.inline-ai {
  background: var(--color-page);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-8) 0;
  max-width: 520px;
}
.inline-ai-label {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  display: flex; align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.inline-chips {
  display: flex; flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.inline-row {
  display: flex; gap: var(--space-3); align-items: center;
  border-top: 1px solid var(--color-border-default);
  padding-top: var(--space-3);
}
.inline-input {
  flex: 1; border: none; background: none; outline: none;
  font-family: var(--font-body);
  font-size: .9375rem;
  color: var(--color-text-primary);
}
.inline-input::placeholder { color: var(--color-text-secondary); font-style: italic; }
.ai-go {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  background: var(--color-accent);
  color: var(--color-page);
  border: none;
  border-radius: var(--radius-full);
  padding: 6px 14px;
  cursor: pointer;
  font-weight: 400;
  transition: background 120ms;
  flex-shrink: 0;
}
.ai-go:hover { background: var(--color-accent-dim); color: var(--color-page); }
.inline-response {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-default);
}
.inline-response-text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  line-height: var(--leading-relaxed);
}

/* ── Aside (sticky) — reading zone ── */
.doc-aside { position: sticky; top: calc(var(--header-height) + var(--space-6)); }
.aside-block {
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-4);
  background: var(--color-raised);
}
.aside-head {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-default);
  background: var(--color-page);
}
.aside-body { padding: var(--space-4); }

/* ── Aside: translation buttons — reading zone ── */
.aside-body--trans {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.aside-trans-btn {
  display: flex;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  min-height: 44px;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  line-height: 1.4;
  color: var(--color-text-primary);
  background: var(--color-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-decoration: none;
  transition: all 120ms;
  white-space: normal;
}
.aside-trans-btn:hover {
  border-color: var(--color-accent-dim);
  background: var(--color-surface);
  color: var(--color-accent);
}
.aside-trans-btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-page);
  font-weight: var(--weight-medium);
}
.aside-trans-btn--primary:hover {
  background: var(--color-accent-dim);
  border-color: var(--color-accent-dim);
  color: var(--color-page);
}
.aside-trans-btn--unavail {
  opacity: 0.5;
  cursor: default;
}
.aside-trans-btn--unavail:hover {
  border-color: var(--color-border-default);
  background: var(--color-raised);
  color: var(--color-text-primary);
}
.fact {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-default);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
}
.fact:last-child { border-bottom: none; }
.fk { color: var(--color-text-secondary); letter-spacing: var(--tracking-wide); }
.fv { color: var(--color-text-primary); font-weight: var(--weight-medium); text-align: right; max-width: 55%; }
.xln {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-default);
}
.xln:last-child { border-bottom: none; }
.xln-name {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: 2px;
}
.xln-meta {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-2);
}
.btn-read {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: lowercase;
  color: var(--color-accent);
  background: none;
  border: 1px solid var(--color-accent-dim);
  border-radius: var(--radius-full);
  padding: 3px 10px;
  cursor: pointer;
  transition: all 120ms;
}
.btn-read:hover { background: var(--color-surface); border-color: var(--color-accent); }

/* Feature 1: Sidebar toggle — shell zone */
.sb-toggle {
  display: flex; align-items: center; gap: var(--space-3);
  cursor: pointer;
  user-select: none;
  padding: var(--space-2) 0;
}
.sb-toggle input[type="checkbox"] { display: none; }
.sb-toggle-track {
  width: 28px; height: 16px;
  border-radius: var(--radius-full);
  background: var(--color-border-default);
  position: relative; flex-shrink: 0;
  transition: background 150ms;
}
.sb-toggle-track::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 12px; height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-text-tertiary);
  transition: transform 150ms;
}
.sb-toggle input:checked + .sb-toggle-track { background: var(--color-accent-dim); }
.sb-toggle input:checked + .sb-toggle-track::after {
  transform: translateX(12px);
  background: var(--color-accent);
}
.sb-toggle-label {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
}

/* Feature 1: status flag in doc hero — reading zone */
.doc-status-flag {
  display: inline-flex; align-items: center; gap: var(--space-2);
  margin-top: var(--space-5);
  padding: var(--space-2) var(--space-4);
  border: 1px dashed var(--color-accent-dim);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: lowercase;
  color: var(--color-accent);
  font-style: normal;
}
.doc-status-flag-icon {
  color: var(--color-accent-dim);
  font-style: normal;
}
.fv--status {
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Feature 2: Translation CTA row in doc hero — reading zone */
.trans-cta-row {
  margin-top: var(--space-6);
}
.trans-label {
  font-size: 9px; letter-spacing: var(--tracking-widest);
  text-transform: uppercase; color: var(--color-text-secondary);
  margin-bottom: var(--space-3); font-family: var(--font-heading);
}
.trans-pills {
  display: flex; flex-wrap: wrap; gap: var(--space-3);
}
.trans-cta-pill {
  display: inline-flex; align-items: center; gap: var(--space-3);
  flex-wrap: wrap;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  min-height: 44px;
  font-family: var(--font-heading); font-size: var(--text-sm);
  cursor: pointer; transition: all 120ms;
  background: var(--color-raised);
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: 0.04em;
  white-space: normal;
  line-height: 1.4;
}
.trans-cta-pill:hover {
  border-color: var(--color-accent-dim);
  background: var(--color-surface);
  color: var(--color-accent);
}
.trans-cta-pill--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-page);
  font-weight: var(--weight-medium);
}
.trans-cta-pill--primary:hover {
  background: var(--color-accent-dim);
  border-color: var(--color-accent-dim);
  color: var(--color-page);
}
.trans-cta-pill--primary .trans-pill-arrow { color: rgba(0,0,0,0.5); }
.trans-cta-pill--primary:hover .trans-pill-arrow { color: rgba(0,0,0,0.6); }
.trans-cta-pill--ext { color: var(--color-text-secondary); }
.trans-cta-pill--unavail {
  color: var(--color-text-secondary);
  cursor: default;
  opacity: 0.6;
}
.trans-cta-pill--unavail:hover {
  border-color: var(--color-border-default);
  background: var(--color-raised);
  color: var(--color-text-secondary);
}
.trans-pill-arrow {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}
.trans-cta-pill:hover .trans-pill-arrow { color: var(--color-accent-dim); }

/* ── Copyright state 2: unverified provenance note ── */
.trans-pill-wrapper {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}
.trans-pill-note {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-tertiary);
  padding-left: var(--space-3);
  letter-spacing: 0.02em;
}

/* ── Copyright state 3: all-external note ── */
.trans-all-external-note {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-tertiary);
  font-style: italic;
  text-align: center;
  margin-top: var(--space-4);
  max-width: 360px;
  line-height: 1.6;
}

/* ── Toast notification ── */
.toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--color-accent);
  color: var(--color-page);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms, transform 200ms;
}
.toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ════════════════════════════════════════════════════════════════
   Feature 3: Reader page — terminal dark throughout.
   Night mode toggle preserved; base is now dark so it's subtle.
   ════════════════════════════════════════════════════════════════ */

.reader-page {
  min-height: 100vh;
  display: flex; flex-direction: column;
  background: var(--color-page);
}
.reader-progress {
  height: 2px;
  background: var(--color-accent);
  width: 0%;
  transition: width 100ms linear;
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
}

/* Slim reader header — 44px, 3-column layout */
.reader-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center;
  padding: 0 var(--space-6);
  height: 44px;
  background: var(--color-page);
  border-bottom: 1px solid var(--color-border-default);
  gap: var(--space-4);
}
.reader-back {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-text-secondary);
  background: none; border: none; cursor: pointer;
  transition: color 120ms; padding: 0;
  white-space: nowrap; flex-shrink: 0;
}
.reader-back:hover { color: var(--color-accent); }

/* Center: doc title · translation name */
.reader-header-center {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  overflow: hidden;
}
.reader-header-doc, .reader-header-trans {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.reader-header-sep {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  flex-shrink: 0;
}
.reader-controls {
  display: flex; align-items: center; gap: var(--space-2);
  flex-shrink: 0;
}
.reader-ctrl {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-text-tertiary);
  background: none;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: 4px 10px;
  cursor: pointer; transition: all 120ms;
}
.reader-ctrl:hover { border-color: var(--color-accent-dim); color: var(--color-accent); background: transparent; }

/* Scrollable reading area */
.reader-body {
  flex: 1; overflow-y: auto;
  max-width: 640px; margin: 0 auto;
  padding: var(--space-12) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--reader-size, 1.125rem);
  line-height: 1.9;
  color: var(--color-text-primary);
  width: 100%;
}

/* Text container: renders normalized HTML paragraphs */
.reader-text p {
  margin-bottom: 1.5em;
}
.reader-text p:last-child { margin-bottom: 0; }

/* Inline verse references — superscript, subdued, mono */
.verse-ref {
  font-family: var(--font-heading);
  font-size: 0.625rem;
  color: var(--color-text-tertiary);
  vertical-align: super;
  line-height: 1;
  margin-right: 0.15em;
  letter-spacing: 0;
}
/* Prologue label in verse-based reader */
.reader-verse-prologue {
  vertical-align: baseline;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
/* Chapter sub-headings (Didache, Ignatius, etc.) */
.reader-chapter-head {
  font-family: var(--font-heading);
  font-weight: var(--weight-light);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-widest);
  text-transform: lowercase;
  color: var(--color-text-tertiary);
  text-align: center;
  margin: 2.5em 0 1.25em;
}
.reader-chapter-head:first-child { margin-top: 0; }

.reader-title {
  text-align: center;
  margin-bottom: var(--space-12);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-border-default);
}
.reader-title-translation {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: var(--tracking-widest);
  text-transform: lowercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}
.reader-title-doc {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

/* ════════════════════════════════════════════════════════════════
   Feature 4: Related section — reading zone
   ════════════════════════════════════════════════════════════════ */

.related-section {
  padding: var(--space-12) var(--space-12) var(--space-20);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-page);
}
.related-section-head {
  font-size: 9px; letter-spacing: var(--tracking-widest);
  text-transform: uppercase; color: var(--color-text-secondary);
  font-family: var(--font-heading); font-weight: var(--weight-medium);
  margin-bottom: var(--space-6);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-border-default);
}
.related-card {
  background: var(--color-raised); padding: var(--space-5);
  cursor: pointer; transition: background 120ms;
  display: flex; flex-direction: column; gap: var(--space-3);
}
.related-card:hover { background: var(--color-surface); }
.related-card-top {
  display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-2);
}
.related-date {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-secondary);
  padding-top: 1px;
  white-space: nowrap;
}
.related-title {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
}
.related-summary {
  font-family: var(--font-body);
  font-size: .8125rem;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border-default); border-radius: 3px; }

/* ════════════════════════════════════════════════════════════════
   RESPONSIVE LAYOUT — breakpoint map
   ════════════════════════════════════════════════════════════════
    900px  — tablet portrait: hide sidebar, full-width main, 2-col grid
    768px  — mobile: header collapses, doc aside hidden, reader padding
    560px  — small mobile: single-column doc grid, flat index layout
   ═══════════════════════════════════════════════════════════════ */

/* ── 900px: tablet portrait and below ── */
@media (max-width: 900px) {
  .app-sidebar { display: none; }
  .app-shell { grid-template-columns: 1fr; }
  .doc-grid { grid-template-columns: repeat(2, 1fr); }
  .home-hero { padding: var(--space-10) var(--space-6); }
  .doc-book { padding: var(--space-8) var(--space-6); }
  .grid-head { padding: var(--space-6) var(--space-6) var(--space-4); }
  .doc-grid { margin-left: var(--space-6); margin-right: var(--space-6); }
  .related-section { padding: var(--space-8) var(--space-5); }
  .related-grid {
    display: flex; overflow-x: auto;
    gap: 0; scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    background: none;
  }
  .related-card {
    flex: 0 0 78vw; scroll-snap-align: start;
    border-right: 1px solid var(--color-border-default);
    border-bottom: 1px solid var(--color-border-default);
  }
}

/* ── 768px: mobile phones ── */
@media (max-width: 768px) {
  /* Keep theme toggle visible on mobile; hide other header-right items */
  .header-right .header-link:not(.theme-toggle),
  .header-right .header-div { display: none; }
  .app-header {
    padding: 0 var(--space-4);
    gap: var(--space-4);
  }
  .header-search { min-width: 0; max-width: 160px; }
  .reader-body { padding: var(--space-8) var(--space-4); }
  .reader-header { padding: 0 var(--space-4); }
  .reader-header-center { display: none; }
  .hero-title { font-size: var(--text-2xl); }
  .ai-bar { width: 100%; }
  .card-summary { -webkit-line-clamp: 2; }

  /* Doc page: single-column, aside hidden, related moves to bottom */
  .doc-book {
    grid-template-columns: 1fr;
    padding: var(--space-8) var(--space-5);
  }
  .doc-aside { display: none; }
  .doc-related-mobile { display: block; margin-top: var(--space-8); }
  .doc-related-desktop { display: none; }
}

/* ── Mobile filter bar ── */
.mobile-filters {
  display: none;
  background: var(--color-page);
  border-bottom: 1px solid var(--color-border-default);
  padding: var(--space-3) 0 var(--space-3) var(--space-6);
}
.mf-chips {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-right: var(--space-6);
}
.mf-chips::-webkit-scrollbar { display: none; }
.mf-chip {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  padding: 5px var(--space-4);
  cursor: pointer;
  transition: all 120ms;
  white-space: nowrap;
  flex-shrink: 0;
}
.mf-chip:hover {
  border-color: var(--color-accent-dim);
  color: var(--color-accent);
  background: var(--color-page);
}
.mf-chip--active {
  background: var(--color-page);
  border-color: var(--color-accent-dim);
  color: var(--color-accent);
  font-weight: 400;
}
.mf-count {
  color: var(--color-text-tertiary);
  font-weight: 300;
  font-size: 10px;
}
.mf-chip--active .mf-count { color: var(--color-accent); }

@media (max-width: 900px) {
  .mobile-filters { display: block; }
}

/* ── 560px: small mobile phones ── */
@media (max-width: 560px) {
  .doc-grid { grid-template-columns: 1fr; }
  .related-card { flex: 0 0 88vw; }

  .home-hero { padding: 12px var(--space-4) var(--space-5); }
  .hero-body { font-size: 1rem; margin-bottom: var(--space-5); }
  .ai-bar    { margin-bottom: var(--space-3); }
  .grid-head { padding: var(--space-5) var(--space-4) var(--space-3); }
  .mobile-filters { padding-left: var(--space-4); }
  .mf-chips { padding-right: var(--space-4); }
  .doc-book  { padding: var(--space-6) var(--space-4); }
  .doc-title { font-size: var(--text-2xl); }

  /* Flat index layout on small mobile */
  .doc-grid {
    gap: 0;
    background: transparent;
    border-top: none;
    margin-left: 0;
    margin-right: 0;
  }
  .doc-card {
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    border-top: 1px solid var(--color-border-default);
    padding: 16px var(--space-4) 12px;
    gap: var(--space-2);
    min-height: 0;
  }
  .card-foot {
    border-top: none;
    padding-top: 0;
    text-transform: none;
    letter-spacing: 0;
  }
}

/* ════════════════════════════════════════════════════════════════
   AI CHAT THREAD — desktop inline expansion (shell zone chrome,
   reading surface for message content)
   ════════════════════════════════════════════════════════════════ */

.ai-bar--thread,
.inline-ai.ai-bar--thread {
  display: flex;
  flex-direction: column;
}

.ai-thread {
  max-height: 55vh;
  overflow-y: auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 80px;
}

.ai-msg {
  display: flex;
  align-items: flex-start;
}

/* User message — mono pill */
.ai-msg--user {
  justify-content: flex-end;
}
.ai-msg-bubble {
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  max-width: 78%;
  line-height: var(--leading-normal);
}

/* AI response — dark card */
.ai-msg--ai {
  justify-content: flex-start;
  flex-direction: column;
}
.ai-msg-card {
  background: var(--color-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  line-height: var(--leading-relaxed);
  max-width: 92%;
}
.ai-msg-card p { margin: 0; }
.ai-msg-card p + p { margin-top: var(--space-3); }

/* Follow-up input row (desktop thread footer — shell zone) */
.ai-thread-footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-surface);
  flex-shrink: 0;
}
.ai-thread-input-field {
  flex: 1;
  border: none;
  background: none;
  outline: none;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}
.ai-thread-input-field::placeholder { color: var(--color-text-tertiary); font-style: normal; }
.ai-thread-send {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-accent);
  background: none; border: none; cursor: pointer;
  transition: color 120ms;
  flex-shrink: 0;
}
.ai-thread-send:hover { color: var(--color-text-primary); }

/* Three sequential pulsing dots — loading state */
.ai-dots {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 0;
}
.ai-dots span {
  width: 5px; height: 5px;
  border-radius: var(--radius-full);
  background: var(--color-text-tertiary);
  animation: dot-pulse 1.2s ease-in-out infinite;
}
.ai-dots span:nth-child(2) { animation-delay: 0.18s; }
.ai-dots span:nth-child(3) { animation-delay: 0.36s; }
@keyframes dot-pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50%       { opacity: 1;   transform: scale(1.35); }
}

/* ════════════════════════════════════════════════════════════════
   MOBILE SLIDE-UP SHEET — reading surface
   ════════════════════════════════════════════════════════════════ */

.ai-scrim {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 320ms ease;
}
.ai-scrim--open {
  opacity: 1;
  pointer-events: auto;
}

.ai-sheet {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 85dvh;
  background: var(--color-page);
  border-radius: 12px 12px 0 0;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 320ms ease;
  box-shadow: 0 -4px 32px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}
.ai-sheet--open { transform: translateY(0); }
.ai-sheet-intro {
  flex-shrink: 0;
  padding: var(--space-5) var(--space-5) var(--space-3);
  transition: opacity 220ms;
}

.ai-sheet-handle-area {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) 0 var(--space-2);
  flex-shrink: 0;
}
.ai-sheet-handle {
  width: 36px; height: 4px;
  border-radius: 2px;
  background: var(--color-border-default);
}

.ai-sheet-thread {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.ai-sheet-footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--color-border-default);
  background: var(--color-page);
  flex-shrink: 0;
}
.ai-sheet-input {
  border: none;
  background: none;
  outline: none;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}
.ai-sheet-input::placeholder { color: var(--color-text-secondary); font-style: italic; }
.ai-sheet-send {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-accent);
  background: none; border: none; cursor: pointer;
  transition: color 120ms;
  flex-shrink: 0;
}
.ai-sheet-send:hover { color: var(--color-accent-dim); }

/* ── FAB (Floating Action Button) — shell accent ── */
@keyframes fab-pulse {
  0%   { transform: scale(1);   opacity: 0.6; }
  70%  { transform: scale(1.55); opacity: 0; }
  100% { transform: scale(1.55); opacity: 0; }
}

.ai-fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 900;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.35);
  transition: transform 120ms, box-shadow 120ms;
}
.ai-fab:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(0,0,0,0.45);
}
.ai-fab--active {
  background: var(--color-accent-dim);
}
.ai-fab-label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: #0f0f0f;
  position: relative;
  z-index: 1;
}
.ai-fab-ring {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-accent-dim);
  animation: fab-pulse 2.4s ease-out infinite;
  pointer-events: none;
}

/* ── Desktop AI panel — reading surface ── */
.ai-panel {
  position: fixed;
  bottom: 92px;
  right: 28px;
  z-index: 901;
  width: 380px;
  height: 500px;
  background: var(--color-page);
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.45), 0 2px 8px rgba(0,0,0,0.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px) scale(0.97);
  pointer-events: none;
  transition: opacity 220ms ease, transform 220ms ease;
}
.ai-panel--open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.ai-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-default);
  flex-shrink: 0;
}
.ai-panel-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-primary);
}
.ai-panel-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: 4px 6px;
  border-radius: 4px;
  transition: color 120ms, background 120ms;
}
.ai-panel-close:hover {
  color: var(--color-text-primary);
  background: var(--color-surface);
}
.ai-panel-thread {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.ai-panel-footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-page);
  flex-shrink: 0;
}
.ai-panel-input {
  border: none;
  background: none;
  outline: none;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}
.ai-panel-input::placeholder { color: var(--color-text-secondary); font-style: italic; }
.ai-panel-send {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-accent);
  background: none; border: none; cursor: pointer;
  transition: color 120ms;
  flex-shrink: 0;
}
.ai-panel-send:hover { color: var(--color-accent-dim); }

@media (max-width: 768px) {
  .ai-fab { bottom: 20px; right: 20px; }
  .ai-panel { display: none; }
}

/* ── FAB empty state ── */
.ai-empty {
  padding: var(--space-2) 0 var(--space-4);
  transition: opacity 220ms;
}
.ai-empty-framing {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}
.ai-empty-framing em {
  font-style: normal;
  color: var(--color-text-primary);
}
.ai-empty-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.ai-empty-chip {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  padding: 5px 11px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-default);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: border-color 150ms, color 150ms;
  text-align: left;
}
.ai-empty-chip:hover {
  border-color: var(--color-accent-dim);
  color: var(--color-accent);
}

/* ── Follow-up suggestion chips ── */
.ai-followup-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}
.ai-followup-chip {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  padding: 5px 11px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-accent-dim);
  background: var(--color-surface);
  color: var(--color-accent);
  cursor: pointer;
  transition: border-color 150ms, background 150ms;
  text-align: left;
}
.ai-followup-chip:hover {
  border-color: var(--color-accent);
  background: var(--color-raised);
}

/* ── Rotating placeholder overlay ── */
.ai-footer-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
}
.ai-footer-wrap input {
  width: 100%;
  border: none;
  background: none;
  outline: none;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}
.ai-rotating-ph {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-text-tertiary);
  pointer-events: none;
  transition: opacity 400ms;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* ── Stop button state ── */
.ai-send--stop,
.ai-thread-send.ai-send--stop,
.ai-panel-send.ai-send--stop,
.ai-sheet-send.ai-send--stop {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
}
.ai-send--stop:hover {
  color: var(--color-text-primary) !important;
}

/* ── Translation pill source subtitle ── */
.trans-cta-pill--has-source,
.aside-trans-btn--has-source {
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}
.trans-pill-source {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--color-text-secondary);
  font-weight: 300;
  font-style: normal;
  letter-spacing: 0;
  line-height: 1.2;
}

/* ── Mobile sort divider + button ── */
.mf-divider {
  width: 1px;
  background: var(--color-border-default);
  height: 18px;
  flex-shrink: 0;
  align-self: center;
  margin: 0 2px;
}
.mf-sort-btn {
  border-color: var(--color-accent-dim);
  color: var(--color-accent);
}

/* ── Mobile sort sheet ── */
.sort-scrim {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 1100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
}
.sort-scrim--open {
  opacity: 1;
  pointer-events: auto;
}
.sort-sheet {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--color-page);
  border-radius: 12px 12px 0 0;
  z-index: 1101;
  transform: translateY(100%);
  transition: transform 280ms ease;
  box-shadow: 0 -4px 24px rgba(0,0,0,0.4);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.sort-sheet--open { transform: translateY(0); }
.sort-sheet-handle-area {
  display: flex; align-items: center; justify-content: center;
  padding: 12px 0 8px;
}
.sort-sheet-handle {
  width: 36px; height: 4px;
  border-radius: 2px;
  background: var(--color-border-default);
}
.sort-sheet-label {
  font-family: var(--font-heading);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  padding: 0 var(--space-6) var(--space-3);
}
.sort-sheet-options {
  padding: 0 var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.sort-sheet-opt {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 120ms;
  width: 100%;
  text-align: left;
}
.sort-sheet-opt:hover { border-color: var(--color-accent-dim); color: var(--color-text-primary); }
.sort-sheet-opt.active { color: var(--color-accent); border-color: var(--color-accent-dim); }
.sort-check {
  color: var(--color-accent);
  font-size: var(--text-sm);
}

/* ════════════════════════════════════════════════════════════════
   AI DOC CARDS — rich reading suggestions in chat thread
   ════════════════════════════════════════════════════════════════ */

.ai-doc-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-3);
  width: 100%;
}

.ai-doc-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  background: var(--color-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
}

.ai-doc-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.ai-doc-card-date {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.ai-doc-card-badge {
  font-family: var(--font-heading);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-secondary);
}

.ai-doc-card-title {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  color: var(--color-text-primary);
  font-weight: 400;
  line-height: 1.3;
}

.ai-doc-card-summary {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.ai-doc-card-trans {
  font-family: var(--font-heading);
  font-size: 11px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
}

.ai-doc-card-read {
  display: block;
  width: 100%;
  margin-top: var(--space-1);
  padding: 7px;
  background: var(--color-accent);
  color: #0f0f0f;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: lowercase;
  cursor: pointer;
  transition: background 120ms;
  text-align: center;
}
.ai-doc-card-read:hover { background: var(--color-accent-dim); }
