/* ============================================================
   AccentLetters — The Typographic Character Desk
   Editorial Reference System (Day Mode Only)
   Palette: Warm Alabaster Canvas, Deep Ink Plum Typography,
   Fine Paper Surfaces, and Crisp Diacritic Keycaps.
   ============================================================ */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Canvas & Surfaces */
  --bg-canvas: #FAF9F6;
  --bg-canvas-subtle: #F3F1EC;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-tile: #FFFFFF;
  --bg-tile-hover: #F8F5FC;
  --bg-input: #FFFFFF;
  --bg-active-pill: #EDE6F7;

  /* Borders & Dividers */
  --border-subtle: #ECE8F0;
  --border-medium: #DDD7E5;
  --border-strong: #C4BACF;
  --border-focus: #593196;

  /* Typography */
  --text-primary: #1E1B24;
  --text-secondary: #61596E;
  --text-muted: #8C8499;
  --text-inverse: #FFFFFF;

  /* Brand Accents */
  --accent-primary: #593196;
  --accent-primary-hover: #452277;
  --accent-light: #F3EFF9;
  --accent-border: #D6CBE8;
  --accent-warm: #C85A32;

  /* Status */
  --success: #15653C;
  --success-surface: #EDF8F2;
  --success-border: #B7E4CD;
  --error: #B91C1C;
  --error-surface: #FEF2F2;

  /* Typography Stacks */
  --font-ui: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-char: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Proportions & Spacing Scale (4/8px) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-full: 9999px;

  /* Shadows (Subtle, Clean Paper Elevations) */
  --shadow-xs: 0 1px 2px rgba(30, 27, 36, 0.04);
  --shadow-sm: 0 1px 3px rgba(30, 27, 36, 0.06), 0 1px 2px rgba(30, 27, 36, 0.04);
  --shadow-md: 0 4px 12px rgba(30, 27, 36, 0.07), 0 2px 4px rgba(30, 27, 36, 0.03);
  --shadow-lg: 0 12px 28px rgba(30, 27, 36, 0.09), 0 4px 8px rgba(30, 27, 36, 0.04);
  --shadow-tile-hover: 0 6px 16px rgba(89, 49, 150, 0.12), 0 2px 4px rgba(30, 27, 36, 0.04);
  --shadow-keycap: 0 1px 0 #CBD0D7, 0 2px 0 rgba(0,0,0,0.06);

  /* Layout */
  --content-max: 1240px;
  --header-height: 68px;
  --transition-fast: 140ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
}

body {
  font-family: var(--font-ui);
  font-size: 0.965rem;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--accent-primary);
  color: var(--text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 10000;
  transition: top var(--transition-fast);
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-4);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* Links & Focus States */
a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-primary-hover);
}
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ── Header ───────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(250, 249, 246, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
  user-select: none;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--accent-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 5px rgba(89, 49, 150, 0.25);
  transition: transform var(--transition-fast);
}
.logo:hover .logo-mark {
  transform: translateY(-1px);
}

.logo-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.logo-text {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.logo-text-sub {
  color: var(--accent-primary);
  font-weight: 700;
}

/* Main Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.main-nav a {
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.main-nav a:hover {
  color: var(--text-primary);
  background-color: var(--bg-canvas-subtle);
}
.main-nav a.active {
  color: var(--accent-primary);
  background-color: var(--accent-light);
  font-weight: 600;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-search-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.86rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-xs);
}
.header-search-btn:hover {
  border-color: var(--accent-border);
  color: var(--text-primary);
  background: #FFFFFF;
}

.search-icon-sm {
  width: 15px;
  height: 15px;
  stroke: var(--text-muted);
}
.search-hint-text {
  margin-right: var(--space-1);
}

.kbd-shortcut {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-canvas-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2px 5px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 6px;
  cursor: pointer;
  color: var(--text-primary);
}
.menu-toggle .icon-close {
  display: none;
}
.menu-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}
.menu-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-4) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: var(--shadow-md);
}
.mobile-nav.open {
  display: flex;
}
.mobile-nav a {
  padding: var(--space-2) var(--space-3);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}
.mobile-nav a:hover {
  background: var(--bg-canvas-subtle);
  color: var(--text-primary);
}

/* ── Page Intro ───────────────────────────────────────────── */
.page-intro {
  padding-top: var(--space-10);
  padding-bottom: var(--space-8);
  text-align: center;
}

.hero-title {
  font-size: 2.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: var(--space-3);
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

/* ── Workspace Card ───────────────────────────────────────── */
.workspace {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-10);
}

/* Search Box */
.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-canvas);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 0 var(--space-4);
  transition: all var(--transition-fast);
  box-shadow: inset 0 1px 2px rgba(30, 27, 36, 0.03);
}
.search-wrap:focus-within {
  border-color: var(--accent-primary);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(89, 49, 150, 0.12);
}

.search-icon-box {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  margin-right: var(--space-3);
}
.search-icon {
  width: 20px;
  height: 20px;
}

.search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 14px 0;
  font-family: inherit;
  font-size: 1.02rem;
  color: var(--text-primary);
  outline: none;
}
.search-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.search-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-kbd-badge {
  font-size: 0.75rem;
  padding: 3px 6px;
}

.search-clear-btn {
  background: var(--bg-canvas-subtle);
  border: none;
  border-radius: var(--radius-full);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.search-clear-btn:hover {
  background: var(--border-medium);
  color: var(--text-primary);
}

/* Quick Picks */
.quick-picks {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.quick-picks-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-right: var(--space-1);
}

.quick-picks-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.quick-pick-btn {
  font-family: var(--font-char);
  font-size: 1.15rem;
  font-weight: 500;
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}
.quick-pick-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent-border);
  color: var(--accent-primary);
  transform: translateY(-1px);
}
.quick-pick-btn.copied {
  background: var(--success-surface);
  border-color: var(--success-border);
  color: var(--success);
}

/* Mode Switch */
.mode-switch {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.mode-switch-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mode-switch-group {
  display: inline-flex;
  background: var(--bg-canvas-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 2px;
}

.mode-btn {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.mode-btn:hover {
  color: var(--text-primary);
}
.mode-btn.active {
  background: #FFFFFF;
  color: var(--accent-primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(30, 27, 36, 0.08);
}

.mode-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Filter Bar */
.filter-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
}

.filter-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.filter-group-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-width: 58px;
}

.filter-btn {
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.filter-btn:hover {
  border-color: var(--border-medium);
  color: var(--text-primary);
  background: #FFFFFF;
}
.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #FFFFFF;
  font-weight: 600;
}

.more-filters-toggle {
  display: none;
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  align-items: center;
  gap: var(--space-2);
}

/* Result Meta */
.result-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  font-size: 0.88rem;
  color: var(--text-muted);
}
.reset-filters-btn {
  background: transparent;
  border: none;
  color: var(--accent-primary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}
.reset-filters-btn:hover {
  text-decoration: underline;
}

/* ── Character Sections & Grid ─────────────────────────────── */
.char-section {
  margin-bottom: var(--space-8);
}
.char-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}
.char-section-title {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--text-primary);
}
.char-section-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-primary);
}
.char-section-link:hover {
  text-decoration: underline;
}

/* Character Tiles Grid */
.char-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(68px, 1fr));
  gap: var(--space-2);
}

.char-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 76px;
  padding: var(--space-2);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-family: var(--font-char);
  font-size: 1.85rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.char-tile:hover {
  background: var(--bg-tile-hover);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-tile-hover);
  transform: translateY(-2px);
  z-index: 2;
}

.char-tile:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

/* Character Sub-label / Name */
.tile-name {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: capitalize;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  margin-top: 2px;
  line-height: 1.2;
}

/* Copied Animation Feedback */
.char-tile.copied {
  background: var(--success-surface) !important;
  border-color: var(--success-border) !important;
  color: var(--success) !important;
  transform: scale(0.96);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
}
.empty-state-icon {
  font-size: 2.5rem;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}
.empty-state h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.empty-state p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}
.clear-btn {
  background: var(--accent-primary);
  color: #FFFFFF;
  border: none;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
}
.clear-btn:hover {
  background: var(--accent-primary-hover);
}

/* ── Composer Scratchpad ──────────────────────────────────── */
.composer {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-10);
  box-shadow: var(--shadow-sm);
}

.composer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.composer-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.composer-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.composer-textarea {
  width: 100%;
  padding: var(--space-4);
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  font-family: var(--font-char);
  font-size: 1.15rem;
  color: var(--text-primary);
  resize: vertical;
  min-height: 85px;
  outline: none;
  transition: border-color var(--transition-fast);
}
.composer-textarea:focus {
  border-color: var(--accent-primary);
  background: #FFFFFF;
}

/* ── Collections (Recent & Favorites) ──────────────────────── */
.collection-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
}

.collection-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.collection-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.collection-badge {
  background: var(--bg-canvas-subtle);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.collection-clear {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
}
.collection-clear:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* ── Reference & How to Type Sections ─────────────────────── */
.how-to-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-xs);
}

.how-to-section h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.how-to-section p {
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
  line-height: 1.6;
}

.section-lead {
  font-size: 1.02rem;
  color: var(--text-secondary);
}

/* Tables */
.shortcuts-table-wrap,
.tech-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin-top: var(--space-4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.shortcuts-table,
.alt-table,
.tech-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.shortcuts-table th,
.alt-table th,
.tech-table th {
  background: var(--bg-canvas);
  color: var(--text-secondary);
  font-weight: 600;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.shortcuts-table td,
.alt-table td,
.tech-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  vertical-align: middle;
}

.shortcuts-table tbody tr:hover,
.alt-table tbody tr:hover,
.tech-table tbody tr:hover {
  background-color: var(--bg-canvas);
}

.char-cell,
.symbol-cell {
  font-family: var(--font-char);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
}

.code-col {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Keycaps (<kbd>) */
.kbd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 3px 7px;
  background: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-bottom: 2px solid #C4BDCC;
  border-radius: 4px;
  color: var(--text-primary);
  box-shadow: var(--shadow-keycap);
  white-space: nowrap;
}

/* Accent Types Cards */
.accent-types {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.accent-type-card {
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transition: border-color var(--transition-fast);
}
.accent-type-card:hover {
  border-color: var(--accent-border);
}
.accent-type-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}
.accent-type-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.45;
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-canvas);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.faq-question:hover {
  background: #FFFFFF;
}

.faq-chevron {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  transition: transform var(--transition-smooth);
}
.faq-question[aria-expanded="true"] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 var(--space-4) var(--space-4);
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.6;
}
.faq-question[aria-expanded="true"] + .faq-answer {
  display: block;
}

/* Related Letters Directory */
.related-letters {
  margin-top: var(--space-10);
  margin-bottom: var(--space-10);
}
.related-letters h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--space-3);
}

.related-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  text-align: center;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}
.related-card:hover {
  border-color: var(--accent-border);
  background: var(--bg-tile-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.related-card-letter {
  font-family: var(--font-char);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: var(--space-1);
}

.related-card-text {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ── Letter Detail Page ────────────────────────────────────── */
.letter-page {
  padding-top: var(--space-6);
}

.letter-hero-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.letter-watermark {
  position: absolute;
  right: var(--space-6);
  bottom: -20px;
  font-family: var(--font-char);
  font-size: 14rem;
  font-weight: 800;
  color: rgba(89, 49, 150, 0.04);
  user-select: none;
  pointer-events: none;
  line-height: 1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}
.breadcrumb a {
  color: var(--text-secondary);
}
.breadcrumb-sep {
  color: var(--border-strong);
}

.letter-hero-content h1 {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.letter-quick-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.stat-pill {
  background: var(--bg-canvas-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 4px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.inpage-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.inpage-link {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 6px 14px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.inpage-link:hover {
  background: var(--accent-light);
  border-color: var(--accent-border);
  color: var(--accent-primary);
}

.case-group {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-xs);
}

.case-group-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.note-box {
  background: #FFFDF7;
  border: 1px solid #E8DEBE;
  border-left: 4px solid #D4A338;
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  font-size: 0.92rem;
  color: #574B2A;
  margin-top: var(--space-4);
}

/* ── ALT Codes Page ────────────────────────────────────────── */
.alt-codes-page {
  padding-top: var(--space-6);
}

.alt-hero {
  text-align: center;
  padding: var(--space-6) 0 var(--space-8);
}
.alt-hero .hero-title {
  font-size: 2.2rem;
  margin-bottom: var(--space-2);
}
.alt-codes-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

/* ── Generic Buttons & Utilities ──────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-primary);
  color: #FFFFFF;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-primary-hover);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border-medium);
  color: var(--text-secondary);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--bg-canvas);
  color: var(--text-primary);
}

.btn-sm {
  padding: 5px 12px;
  font-size: 0.82rem;
}

/* ── Toast Notification ───────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(40px);
  background: #1E1B24;
  color: #FFFFFF;
  padding: 10px 18px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  z-index: 10000;
  transition: all 220ms cubic-bezier(0.16, 1, 0.3, 1);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast-icon {
  width: 16px;
  height: 16px;
  color: #34D399;
}

/* ── Detail Drawer Modal ──────────────────────────────────── */
.detail-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(30, 27, 36, 0.4);
  backdrop-filter: blur(4px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.detail-overlay.open {
  display: flex;
}

.detail-drawer {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  max-width: 440px;
  width: 100%;
  padding: var(--space-6);
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: modalEnter 180ms ease-out;
}
@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.detail-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
}
.detail-close:hover {
  background: var(--border-subtle);
  color: var(--text-primary);
}

.detail-char-display {
  font-family: var(--font-char);
  font-size: 4rem;
  font-weight: 500;
  text-align: center;
  color: var(--accent-primary);
  margin-bottom: var(--space-2);
}

.detail-char-name {
  font-size: 1.15rem;
  font-weight: 700;
  text-align: center;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.detail-char-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: var(--space-5);
}

.detail-codes {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.detail-code-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.detail-code-label {
  color: var(--text-muted);
}
.detail-code-value {
  color: var(--text-primary);
  font-weight: 600;
}
.detail-code-copy {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  padding: 4px;
}
.detail-code-copy:hover {
  color: var(--accent-primary);
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  margin-top: auto;
  background: #FFFFFF;
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-8) 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.footer-links a {
  color: var(--text-secondary);
}
.footer-links a:hover {
  color: var(--accent-primary);
}

/* ── Responsive Breakpoints ───────────────────────────────── */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2rem;
  }
  .workspace {
    padding: var(--space-5);
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .header-actions .kbd-shortcut {
    display: none;
  }
  .more-filters-toggle {
    display: inline-flex;
  }
  .accent-type-filter {
    display: none;
  }
  .accent-type-filter.open {
    display: flex;
  }
  .char-grid {
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
    gap: 6px;
  }
  .char-tile {
    min-height: 64px;
    font-size: 1.55rem;
  }
  .tile-name {
    display: none;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}