/* ═══════════════════════════════════════════════════════════════════════════
   Music Theory Scholarship Database — Stylesheet
   Header/filter: dark navy   Cloud + Drawer: off-white   Cards: dark
   ═══════════════════════════════════════════════════════════════════════════ */

/* Enforce [hidden] attribute even when an element has an explicit display rule */
[hidden] { display: none !important; }

/* ── Custom properties ──────────────────────────────────────────────────── */
:root {
  /* Dark chrome (header, filter bar) */
  --bg:           #0d1117;
  --surface:      #161b22;
  --surface-2:    #21262d;
  --surface-3:    #2d333b;
  --border:       #30363d;
  --border-light: #3d444d;

  --text:         #e6edf3;
  --text-muted:   #8b949e;
  --text-dim:     #6e7681;

  /* Light grey canvas (cloud + drawer background) */
  --canvas:       #f6f6f6;
  --canvas-2:     #ebebeb;
  --canvas-border:#d4d4d4;
  --canvas-text:  #1a1a1a;
  --canvas-muted: #6b6b6b;
  --canvas-dim:   #9e9e9e;

  /* Gold */
  --gold:         #c9a84c;
  --gold-bright:  #e2c06a;
  --gold-dim:     #8a6e30;
  --gold-glow:    rgba(201, 168, 76, 0.18);

  /* Word cloud colors — dark enough for off-white background */
  --word-gold:    #7a4e0c;
  --word-blue:    #1a5c8a;
  --word-green:   #2a6b35;
  --word-red:     #962020;
  --word-purple:  #5c2b8a;
  --word-grey:    #4a5568;

  --red-dim:      #f85149;

  /* Layout */
  --header-h:      62px;
  --filter-h:      48px;
  --drawer-radius: 14px;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { font-size: 16px; }

body {
  background:  var(--bg);
  color:       var(--text);
  font-family: var(--font-sans);
  font-size:   0.9375rem;
  line-height: 1.5;
  height:      100vh;
  height:      100dvh;
  overflow:    hidden;
  display:     flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Header ──────────────────────────────────────────────────────────────── */
.site-header {
  flex-shrink:   0;
  height:        var(--header-h);
  background:    var(--surface);
  border-bottom: 1px solid var(--border);
  z-index:       50;
}

.header-inner {
  max-width:   100%;
  height:      100%;
  display:     flex;
  align-items: center;
  gap:         1.25rem;
  padding:     0 1.25rem;
}

.site-branding {
  display:     flex;
  align-items: center;
  gap:         0.5rem;
  flex-shrink: 0;
}

.site-icon {
  font-size:   1.5rem;
  color:       var(--gold);
  line-height: 1;
  user-select: none;
}

.site-title {
  font-family: var(--font-serif);
  font-size:   1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color:       var(--gold);
  white-space: nowrap;
}

/* Search */
.search-form {
  display:     flex;
  align-items: center;
  gap:         0.5rem;
  flex:        1;
  min-width:   0;
  max-width:   560px;
  margin-left: auto;
}

.search-field-wrap {
  position: relative;
  flex:     1;
  min-width: 0;
}

.search-icon {
  position:    absolute;
  left:        0.65rem;
  top:         50%;
  transform:   translateY(-50%);
  width:       16px;
  height:      16px;
  color:       var(--text-muted);
  pointer-events: none;
}

.search-input {
  width:       100%;
  background:  var(--surface-2);
  border:      1px solid var(--border);
  border-radius: 6px;
  color:       var(--text);
  font-family: var(--font-sans);
  font-size:   0.875rem;
  padding:     0.45rem 2.25rem 0.45rem 2.1rem;
  outline:     none;
  transition:  border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance:  none;
}

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

.search-input:focus {
  border-color: var(--gold-dim);
  box-shadow:   0 0 0 3px var(--gold-glow);
}

.search-input::-webkit-search-cancel-button { display: none; }

.search-clear {
  position:    absolute;
  right:       0.5rem;
  top:         50%;
  transform:   translateY(-50%);
  background:  none;
  border:      none;
  color:       var(--text-muted);
  cursor:      pointer;
  font-size:   0.8rem;
  line-height: 1;
  padding:     2px 4px;
  border-radius: 3px;
  transition:  color 0.15s;
}
.search-clear:hover { color: var(--text); }

.search-submit {
  flex-shrink:   0;
  background:    var(--gold);
  border:        none;
  border-radius: 6px;
  color:         #0d1117;
  cursor:        pointer;
  font-family:   var(--font-sans);
  font-size:     0.8125rem;
  font-weight:   600;
  letter-spacing: 0.02em;
  padding:       0.45rem 1rem;
  transition:    background 0.15s, transform 0.1s;
  white-space:   nowrap;
}
.search-submit:hover  { background: var(--gold-bright); }
.search-submit:active { transform: scale(0.97); }

/* ── Stats banner ────────────────────────────────────────────────────────── */
.stats-banner {
  flex-shrink:   0;
  height:        28px;
  background:    rgba(13, 17, 23, 0.7);
  border-bottom: 1px solid var(--border);
  display:       flex;
  align-items:   center;
  justify-content: center;
  gap:           0.6rem;
  font-size:     0.72rem;
  letter-spacing: 0.04em;
  color:         var(--text-dim);
  padding:       0 1.25rem;
  white-space:   nowrap;
  overflow:      hidden;
  text-overflow: ellipsis;
}

.stats-banner .stat-num {
  color:       var(--text-muted);
  font-weight: 500;
}

.stats-banner .stat-sep {
  color:       var(--border-light);
}

/* ── Filter bar ──────────────────────────────────────────────────────────── */
.filter-bar {
  flex-shrink:   0;
  height:        var(--filter-h);
  background:    var(--surface);
  border-bottom: 1px solid var(--border);
  display:       flex;
  align-items:   center;
  gap:           1rem;
  padding:       0 1.25rem;
  overflow-x:    auto;
  scrollbar-width: none;
  z-index:       40;
}
.filter-bar::-webkit-scrollbar { display: none; }

.filter-group {
  display:     flex;
  align-items: center;
  gap:         0.5rem;
  flex-shrink: 0;
}

.filter-label {
  font-size:      0.75rem;
  font-weight:    600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color:          var(--text-muted);
  white-space:    nowrap;
}

.filter-divider {
  width:       1px;
  height:      20px;
  background:  var(--border);
  flex-shrink: 0;
}

.btn-group {
  display:     flex;
  align-items: center;
  gap:         2px;
}

.filter-btn {
  background:    transparent;
  border:        1px solid transparent;
  border-radius: 5px;
  color:         var(--text-muted);
  cursor:        pointer;
  font-family:   var(--font-sans);
  font-size:     0.8rem;
  font-weight:   500;
  line-height:   1;
  padding:       0.3rem 0.65rem;
  transition:    background 0.12s, color 0.12s, border-color 0.12s;
  white-space:   nowrap;
}

.filter-btn:hover:not(.active) {
  background:   var(--surface-2);
  color:        var(--text);
  border-color: var(--border-light);
}

.filter-btn.active {
  background:   var(--gold-glow);
  border-color: var(--gold-dim);
  color:        var(--gold);
  font-weight:  600;
}

.filter-stats {
  margin-left: auto;
  flex-shrink: 0;
  font-size:   0.78rem;
  color:       var(--text-dim);
  white-space: nowrap;
}

/* ── Cloud area — off-white canvas ───────────────────────────────────────── */
.cloud-area {
  flex:       1;
  min-height: 400px;
  position:   relative;
  overflow:   hidden;
  background: radial-gradient(
    ellipse 90% 80% at 50% 45%,
    #fafafa 0%,
    #efefef 100%
  );
}

#word-cloud {
  display: block;
  width:   100%;
  height:  100%;
}

/* Loading overlay */
.cloud-overlay {
  position:   absolute;
  inset:      0;
  display:    flex;
  align-items: center;
  justify-content: center;
  background: rgba(246, 246, 246, 0.72);
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index:    5;
}

.cloud-spinner {
  width:         36px;
  height:        36px;
  border:        2.5px solid var(--canvas-border);
  border-top-color: var(--word-gold);
  border-radius: 50%;
  animation:     spin 0.75s linear infinite;
}

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

.cloud-empty {
  position:  absolute;
  inset:     0;
  display:   flex;
  align-items: center;
  justify-content: center;
  color:     var(--canvas-muted);
  font-style: italic;
  z-index:   4;
}

.cloud-hint {
  position:      absolute;
  bottom:        1rem;
  left:          50%;
  transform:     translateX(-50%);
  font-size:     0.75rem;
  color:         var(--canvas-muted);
  letter-spacing: 0.04em;
  pointer-events: none;
  white-space:   nowrap;
  transition:    opacity 0.4s ease;
  z-index:       4;
  background:    rgba(246, 246, 246, 0.88);
  padding:       0.22rem 0.85rem;
  border-radius: 20px;
  border:        1px solid rgba(212, 212, 212, 0.5);
}

/* ── Color legend ────────────────────────────────────────────────────────── */
.cloud-legend {
  position:       absolute;
  bottom:         2.75rem;
  left:           1rem;
  display:        flex;
  flex-direction: column;
  gap:            0.28rem;
  z-index:        4;
  pointer-events: none;
  background:     rgba(246, 246, 246, 0.88);
  padding:        0.45rem 0.7rem;
  border-radius:  10px;
  border:         1px solid rgba(212, 212, 212, 0.5);
}

.legend-item {
  display:     flex;
  align-items: center;
  gap:         0.35rem;
  font-size:   0.67rem;
  letter-spacing: 0.01em;
  color:       var(--canvas-muted);
}

.legend-dot {
  width:         8px;
  height:        8px;
  border-radius: 50%;
  flex-shrink:   0;
}

.ld-gold   { background: var(--word-gold); }
.ld-blue   { background: var(--word-blue); }
.ld-green  { background: var(--word-green); }
.ld-red    { background: var(--word-red); }
.ld-purple { background: var(--word-purple); }

/* ── Tooltip ─────────────────────────────────────────────────────────────── */
.kw-tooltip {
  position:      fixed;
  background:    #f0f0f0;
  border:        1px solid var(--canvas-border);
  border-radius: 6px;
  color:         var(--canvas-text);
  font-size:     0.78rem;
  padding:       0.45rem 0.75rem;
  pointer-events: none;
  max-width:     220px;
  z-index:       200;
  opacity:       0;
  transform:     translateY(4px);
  transition:    opacity 0.12s, transform 0.12s;
  box-shadow:    0 4px 16px rgba(0, 0, 0, 0.12);
  display:       flex;
  flex-direction: column;
  gap:           0.2rem;
}

.kw-tooltip.visible {
  opacity:   1;
  transform: translateY(0);
}

.tt-keyword {
  font-family:  var(--font-serif);
  font-weight:  600;
  font-size:    0.85rem;
  line-height:  1.2;
}

.tt-total {
  color:        var(--canvas-muted);
  font-size:    0.75rem;
}

.tt-breakdown {
  color:        var(--canvas-dim);
  font-size:    0.7rem;
  letter-spacing: 0.01em;
}

/* ── Drawer overlay ──────────────────────────────────────────────────────── */
.drawer-overlay {
  position:       fixed;
  inset:          0;
  background:     rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity:        0;
  pointer-events: none;
  transition:     opacity 0.3s ease;
  z-index:        90;
}
.drawer-overlay.visible {
  opacity:        1;
  pointer-events: auto;
}

/* ── Drawer — off-white, dark cards ─────────────────────────────────────── */
.drawer {
  position:   fixed;
  bottom:     0;
  left:       0;
  right:      0;
  height:     calc(100vh - var(--header-h));
  min-height: 360px;
  max-height: calc(100vh - var(--header-h));

  background:    var(--canvas);
  border-top:    1px solid var(--canvas-border);
  border-radius: var(--drawer-radius) var(--drawer-radius) 0 0;
  box-shadow:    0 -8px 40px rgba(0, 0, 0, 0.14);

  display:        flex;
  flex-direction: column;
  overflow:       hidden;

  transform:  translateY(100%);
  transition: transform 0.38s var(--ease-out-expo);
  z-index:    100;
}

.drawer.open { transform: translateY(0); }

/* Drag handle */
.drawer-handle {
  flex-shrink:     0;
  display:         flex;
  align-items:     center;
  justify-content: center;
  height:          28px;
  cursor:          pointer;
  background:      none;
  border:          none;
  padding:         0;
}

.drawer-handle::before {
  content:       '';
  display:       block;
  width:         40px;
  height:        4px;
  background:    var(--canvas-border);
  border-radius: 2px;
  transition:    background 0.15s;
}
.drawer-handle:hover::before { background: var(--canvas-muted); }

/* Drawer header */
.drawer-header {
  flex-shrink:   0;
  display:       grid;
  grid-template-columns: 1fr auto;
  grid-template-rows:    auto auto;
  column-gap:    1rem;
  padding:       0.25rem 1.25rem 0.85rem;
  border-bottom: 1px solid var(--canvas-border);
  background:    var(--canvas);
}

.drawer-title-row {
  display:     flex;
  align-items: baseline;
  gap:         0.75rem;
  min-width:   0;
}

.drawer-heading {
  font-family:   var(--font-serif);
  font-size:     1.35rem;
  font-weight:   600;
  line-height:   1.2;
  overflow:      hidden;
  text-overflow: ellipsis;
  white-space:   nowrap;
  color:         var(--canvas-text);
}

.drawer-keyword { color: var(--word-gold); }

.drawer-badge {
  flex-shrink:   0;
  font-size:     0.78rem;
  font-weight:   500;
  color:         var(--canvas-muted);
  background:    var(--canvas-2);
  border:        1px solid var(--canvas-border);
  border-radius: 20px;
  padding:       0.15rem 0.6rem;
  white-space:   nowrap;
}

.drawer-meta {
  grid-column:    1;
  font-size:      0.78rem;
  color:          var(--canvas-muted);
  margin-top:     0.2rem;
  text-transform: capitalize;
}

.drawer-close {
  grid-column:   2;
  grid-row:      1 / 3;
  align-self:    start;
  background:    none;
  border:        none;
  border-radius: 6px;
  color:         var(--canvas-muted);
  cursor:        pointer;
  padding:       0.35rem;
  line-height:   0;
  transition:    color 0.15s, background 0.15s;
}
.drawer-close svg { width: 16px; height: 16px; }
.drawer-close:hover {
  color:      var(--canvas-text);
  background: var(--canvas-2);
}

/* ── Sort bar ────────────────────────────────────────────────────────────── */
.sort-bar {
  flex-shrink:   0;
  display:       flex;
  align-items:   center;
  gap:           0.6rem;
  padding:       0.35rem 1.25rem;
  border-bottom: 1px solid var(--canvas-border);
  background:    var(--canvas-2);
}

.sort-label {
  font-size:      0.68rem;
  font-weight:    600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color:          var(--canvas-muted);
  flex-shrink:    0;
}

.sort-btns {
  display:  flex;
  flex-wrap: wrap;
  gap:      2px;
}

.sort-btn {
  background:    transparent;
  border:        1px solid transparent;
  border-radius: 4px;
  color:         var(--canvas-muted);
  cursor:        pointer;
  font-family:   var(--font-sans);
  font-size:     0.75rem;
  font-weight:   500;
  padding:       0.2rem 0.55rem;
  transition:    background 0.12s, color 0.12s, border-color 0.12s;
  white-space:   nowrap;
}
.sort-btn:hover:not(.active) {
  background:   var(--canvas);
  color:        var(--canvas-text);
  border-color: var(--canvas-border);
}
.sort-btn.active {
  background:   rgba(122, 78, 12, 0.12);
  border-color: rgba(122, 78, 12, 0.35);
  color:        var(--word-gold);
  font-weight:  600;
}

/* ── Drawer within-drawer search ─────────────────────────────────────────── */
.drawer-search-wrap {
  flex-shrink:   0;
  display:       flex;
  align-items:   center;
  gap:           0.5rem;
  padding:       0.55rem 1.25rem;
  border-bottom: 1px solid var(--canvas-border);
  background:    var(--canvas);
}

.drawer-search-icon {
  flex-shrink: 0;
  width:       15px;
  height:      15px;
  color:       var(--canvas-muted);
}

.drawer-search-input {
  flex:        1;
  background:  #fff;
  border:      1px solid var(--canvas-border);
  border-radius: 5px;
  color:       var(--canvas-text);
  font-family: var(--font-sans);
  font-size:   0.83rem;
  padding:     0.35rem 0.7rem;
  outline:     none;
  transition:  border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance:  none;
}
.drawer-search-input::placeholder { color: var(--canvas-dim); }
.drawer-search-input:focus {
  border-color: var(--word-gold);
  box-shadow:   0 0 0 2px rgba(122, 78, 12, 0.12);
}
.drawer-search-input::-webkit-search-cancel-button { display: none; }

/* ── Drawer tabs ─────────────────────────────────────────────────────────── */
.drawer-tabs {
  flex-shrink:   0;
  display:       flex;
  border-bottom: 1px solid var(--canvas-border);
  background:    var(--canvas);
}

.drawer-tab {
  flex:          1;
  background:    none;
  border:        none;
  border-bottom: 2px solid transparent;
  color:         var(--canvas-muted);
  cursor:        pointer;
  font-family:   var(--font-sans);
  font-size:     0.82rem;
  font-weight:   500;
  padding:       0.6rem 1rem;
  transition:    color 0.15s, border-color 0.15s;
  display:       flex;
  align-items:   center;
  justify-content: center;
  gap:           0.4rem;
}

.drawer-tab.active {
  color:               var(--canvas-text);
  border-bottom-color: var(--word-gold);
  font-weight:         600;
}

.drawer-tab:hover:not(.active) { color: var(--canvas-text); }

.tab-count {
  font-size:   0.72rem;
  font-weight: 400;
  color:       var(--canvas-muted);
  background:  var(--canvas-2);
  border:      1px solid var(--canvas-border);
  border-radius: 10px;
  padding:     0.05rem 0.45rem;
  min-width:   1.5rem;
  text-align:  center;
}

.drawer-tab.active .tab-count {
  background:  rgba(122, 78, 12, 0.12);
  border-color: rgba(122, 78, 12, 0.35);
  color:       var(--word-gold);
}

/* Drawer scrollable body */
.drawer-body {
  flex:       1;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--canvas);
}

.drawer-body::-webkit-scrollbar { width: 5px; }
.drawer-body::-webkit-scrollbar-track { background: transparent; }
.drawer-body::-webkit-scrollbar-thumb {
  background:    var(--canvas-border);
  border-radius: 3px;
}

/* ── Result list — light cards on grey canvas ────────────────────────────── */
.result-list {
  list-style: none;
  padding:    0.65rem 0.85rem 2rem;
  display:    flex;
  flex-direction: column;
  gap:        0.5rem;
}

.result-card {
  display:       flex;
  gap:           0.9rem;
  padding:       0.85rem 1rem;
  background:    #ffffff;
  border:        1px solid var(--canvas-border);
  border-radius: 8px;
  box-shadow:    0 1px 4px rgba(0, 0, 0, 0.07);
  transition:    background 0.12s, box-shadow 0.12s;
  position:      relative;
  cursor:        pointer;
}
.result-card:hover {
  background:  #f5f5f5;
  box-shadow:  0 4px 12px rgba(0, 0, 0, 0.10);
}

.result-cover {
  flex-shrink:  0;
  width:        52px;
  height:       72px;
  object-fit:   cover;
  border-radius: 3px;
  border:       1px solid var(--border);
  align-self:   flex-start;
}

.result-content {
  flex:      1;
  min-width: 0;
}

.result-top-row {
  display:       flex;
  align-items:   center;
  flex-wrap:     wrap;
  gap:           0.35rem;
  margin-bottom: 0.3rem;
}

/* Type badge */
.result-type-badge {
  font-size:      0.66rem;
  font-weight:    600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding:        0.1rem 0.45rem;
  border-radius:  3px;
  border:         1px solid;
}

.result-type-article {
  color:        #0369a1;
  border-color: #bae6fd;
  background:   rgba(3, 105, 161, 0.06);
}
.result-type-book {
  color:        var(--word-gold);
  border-color: rgba(122, 78, 12, 0.3);
  background:   rgba(122, 78, 12, 0.06);
}
.result-type-chapter {
  color:        #166534;
  border-color: #bbf7d0;
  background:   rgba(22, 101, 52, 0.06);
}
.result-type-review {
  color:        #92400e;
  border-color: #fde68a;
  background:   rgba(146, 64, 14, 0.06);
}

.result-year {
  font-size:   0.78rem;
  font-weight: 500;
  color:       var(--canvas-muted);
}

.result-journal {
  font-size:     0.78rem;
  color:         var(--canvas-muted);
  font-style:    italic;
  overflow:      hidden;
  text-overflow: ellipsis;
  white-space:   nowrap;
  max-width:     240px;
}

.result-voliss {
  font-size: 0.75rem;
  color:     var(--canvas-dim);
}

.result-title {
  font-family:   var(--font-serif);
  font-size:     0.975rem;
  font-weight:   400;
  line-height:   1.35;
  color:         var(--canvas-text);
  margin-bottom: 0.25rem;
}

.result-title-link {
  color:           var(--canvas-text);
  text-decoration: none;
  transition:      color 0.15s;
}
.result-title-link:hover {
  color:                  var(--word-gold);
  text-decoration:        underline;
  text-underline-offset:  3px;
  text-decoration-color:  rgba(122, 78, 12, 0.4);
}

.result-authors {
  font-size:     0.8rem;
  color:         var(--canvas-muted);
  margin-bottom: 0.25rem;
}

.result-abstract {
  font-size:          0.81rem;
  color:              var(--canvas-muted);
  line-height:        1.55;
  display:            -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow:           hidden;
}

/* State messages */
.result-loading,
.result-empty,
.result-error {
  list-style: none;
  padding:    2.5rem 1.5rem;
  text-align: center;
  color:      var(--canvas-muted);
  font-style: italic;
  font-size:  0.9rem;
}

.result-loading {
  display:     flex;
  align-items: center;
  justify-content: center;
  gap:         0.6rem;
}

.spinner {
  display:       inline-block;
  width:         16px;
  height:        16px;
  border:        2px solid var(--canvas-border);
  border-top-color: var(--word-gold);
  border-radius: 50%;
  animation:     spin 0.7s linear infinite;
  flex-shrink:   0;
}

.result-error { color: var(--red-dim); font-style: normal; }

/* ── Keyword source badge ────────────────────────────────────────────────── */
.kw-source-badge {
  font-size:      0.63rem;
  font-weight:    500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding:        0.08rem 0.4rem;
  border-radius:  3px;
  border:         1px solid;
  flex-shrink:    0;
}

.kw-source-explicit {
  color:        #166534;
  border-color: #86efac;
  background:   rgba(22, 101, 52, 0.06);
}

.kw-source-extracted {
  color:        var(--canvas-muted);
  border-color: var(--canvas-border);
  background:   transparent;
}

/* ── Search term highlight ───────────────────────────────────────────────── */
mark {
  background:    rgba(201, 168, 76, 0.25);
  color:         var(--word-gold);
  border-radius: 2px;
  padding:       0 1px;
}

/* ── Book cover placeholder ──────────────────────────────────────────────── */
.result-cover-placeholder {
  flex-shrink:     0;
  width:           52px;
  height:          72px;
  border-radius:   3px;
  border:          1px solid var(--canvas-border);
  background:      var(--canvas-2);
  display:         flex;
  align-items:     center;
  justify-content: center;
  color:           var(--canvas-dim);
  align-self:      flex-start;
}

.result-cover-placeholder svg { width: 24px; height: 24px; }

/* ── Chapters sub-list ───────────────────────────────────────────────────── */
.chapter-toggle {
  background:    none;
  border:        1px solid var(--canvas-border);
  border-radius: 4px;
  color:         var(--canvas-muted);
  cursor:        pointer;
  font-family:   var(--font-sans);
  font-size:     0.75rem;
  padding:       0.2rem 0.55rem;
  margin-top:    0.4rem;
  transition:    color 0.12s, border-color 0.12s;
}
.chapter-toggle:hover { color: var(--canvas-text); border-color: var(--canvas-muted); }

.chapter-list {
  list-style:  none;
  margin-top:  0.5rem;
  border-left: 2px solid var(--canvas-border);
  padding-left: 0.75rem;
}

.chapter-item {
  padding:       0.4rem 0;
  border-bottom: 1px solid var(--canvas-border);
  font-size:     0.82rem;
}
.chapter-item:last-child { border-bottom: none; }

.chapter-item a { color: var(--canvas-muted); text-decoration: none; }
.chapter-item a:hover { color: var(--word-gold); text-decoration: underline; }

/* ── Pagination ──────────────────────────────────────────────────────────── */
.pagination {
  display:         flex;
  align-items:     center;
  justify-content: center;
  gap:             1rem;
  padding:         0.85rem 1.25rem 1.5rem;
  border-top:      1px solid var(--canvas-border);
  background:      var(--canvas);
}

.page-btn {
  background:    var(--canvas-2);
  border:        1px solid var(--canvas-border);
  border-radius: 5px;
  color:         var(--canvas-muted);
  cursor:        pointer;
  font-family:   var(--font-sans);
  font-size:     0.8rem;
  font-weight:   500;
  padding:       0.35rem 0.85rem;
  transition:    background 0.12s, color 0.12s, border-color 0.12s;
}
.page-btn:hover:not(:disabled) {
  background:   var(--canvas);
  color:        var(--canvas-text);
  border-color: var(--canvas-muted);
}
.page-btn:disabled {
  opacity: 0.35;
  cursor:  not-allowed;
}

.page-info {
  font-size:   0.78rem;
  color:       var(--canvas-muted);
  min-width:   80px;
  text-align:  center;
}

/* ── Search suggestions (no-results) ────────────────────────────────────── */
.search-suggest {
  padding:    1.25rem 1.5rem 2rem;
  text-align: center;
}

.search-suggest p {
  font-size:     0.85rem;
  color:         var(--canvas-muted);
  margin-bottom: 0.85rem;
  font-style:    italic;
}

.suggest-chips {
  display:        flex;
  flex-wrap:      wrap;
  justify-content: center;
  gap:            0.4rem;
}

.suggest-chip {
  background:    var(--canvas-2);
  border:        1px solid var(--canvas-border);
  border-radius: 20px;
  color:         var(--canvas-muted);
  cursor:        pointer;
  font-size:     0.8rem;
  padding:       0.25rem 0.75rem;
  transition:    background 0.12s, color 0.12s, border-color 0.12s;
}
.suggest-chip:hover {
  background:   rgba(122, 78, 12, 0.06);
  border-color: rgba(122, 78, 12, 0.3);
  color:        var(--word-gold);
}

/* ── Modal ───────────────────────────────────────────────────────────────── */
.modal-overlay {
  position:        fixed;
  inset:           0;
  background:      rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index:         300;
  display:         flex;
  align-items:     center;
  justify-content: center;
  padding:         1rem;
  opacity:         0;
  pointer-events:  none;
  transition:      opacity 0.2s ease;
}
.modal-overlay.open {
  opacity:        1;
  pointer-events: auto;
}

.modal {
  background:    var(--canvas);
  border-radius: 12px;
  max-width:     660px;
  width:         100%;
  max-height:    85vh;
  display:       flex;
  flex-direction: column;
  overflow:      hidden;
  box-shadow:    0 24px 64px rgba(0, 0, 0, 0.5);
  transform:     scale(0.96) translateY(10px);
  transition:    transform 0.22s var(--ease-out-expo);
}
.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  flex-shrink:  0;
  padding:      1.35rem 1.5rem 1rem;
  border-bottom: 1px solid var(--canvas-border);
  position:     relative;
  display:      flex;
  gap:          1rem;
  align-items:  flex-start;
}

.modal-cover {
  flex-shrink: 0;
  width:       72px;
  height:      100px;
  object-fit:  cover;
  border-radius: 4px;
  border:      1px solid var(--border);
  margin-top:  0.1rem;
}

.modal-header-text {
  flex: 1;
  min-width: 0;
}

.modal-badges {
  display:       flex;
  flex-wrap:     wrap;
  gap:           0.35rem;
  margin-bottom: 0.55rem;
}

.modal-title {
  font-family:   var(--font-serif);
  font-size:     1.15rem;
  font-weight:   600;
  line-height:   1.35;
  color:         var(--canvas-text);
  padding-right: 2rem;
  margin-bottom: 0.4rem;
}

.modal-authors {
  font-size:   0.84rem;
  color:       var(--canvas-muted);
  margin-bottom: 0.5rem;
}

.modal-meta-grid {
  display:   flex;
  flex-wrap: wrap;
  gap:       0.35rem 0.75rem;
  font-size: 0.78rem;
  color:     var(--canvas-muted);
}

.modal-meta-item {
  display:     flex;
  align-items: center;
  gap:         0.3rem;
}

.modal-meta-label {
  font-weight:    600;
  letter-spacing: 0.04em;
  color:          var(--canvas-dim);
  font-size:      0.68rem;
  text-transform: uppercase;
}

.modal-close {
  position:      absolute;
  top:           1rem;
  right:         1rem;
  background:    none;
  border:        none;
  border-radius: 6px;
  color:         var(--canvas-muted);
  cursor:        pointer;
  line-height:   0;
  padding:       0.3rem;
  transition:    color 0.15s, background 0.15s;
}
.modal-close svg { width: 16px; height: 16px; }
.modal-close:hover {
  color:      var(--canvas-text);
  background: var(--canvas-2);
}

.modal-body {
  flex:       1;
  overflow-y: auto;
  padding:    1.25rem 1.5rem 1rem;
}

.modal-body::-webkit-scrollbar { width: 5px; }
.modal-body::-webkit-scrollbar-track { background: transparent; }
.modal-body::-webkit-scrollbar-thumb {
  background:    var(--canvas-border);
  border-radius: 3px;
}

.modal-section {
  margin-bottom: 1.5rem;
}

.modal-section h3 {
  font-size:      0.68rem;
  font-weight:    600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color:          var(--canvas-muted);
  margin-bottom:  0.55rem;
  border-bottom:  1px solid var(--canvas-border);
  padding-bottom: 0.35rem;
}

.modal-abstract {
  font-size:   0.875rem;
  color:       var(--canvas-text);
  line-height: 1.7;
}

.modal-abstract-empty {
  font-style: italic;
  color:      var(--canvas-dim);
  font-size:  0.875rem;
}

.modal-kw-list {
  display:   flex;
  flex-wrap: wrap;
  gap:       0.35rem;
}

.modal-kw-chip {
  background:    var(--canvas-2);
  border:        1px solid var(--canvas-border);
  border-radius: 20px;
  color:         var(--canvas-text);
  font-size:     0.78rem;
  padding:       0.22rem 0.65rem;
  cursor:        pointer;
  transition:    background 0.12s, border-color 0.12s, color 0.12s;
}
.modal-kw-chip:hover {
  background:   rgba(122, 78, 12, 0.08);
  border-color: rgba(122, 78, 12, 0.35);
  color:        var(--word-gold);
}

.modal-kw-loading {
  font-size:  0.82rem;
  color:      var(--canvas-dim);
  font-style: italic;
}

.modal-footer {
  flex-shrink:  0;
  padding:      0.85rem 1.5rem;
  border-top:   1px solid var(--canvas-border);
  display:      flex;
  justify-content: flex-end;
  background:   var(--canvas-2);
}

.modal-link {
  font-size:   0.82rem;
  color:       var(--word-blue);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition:  color 0.15s;
}
.modal-link:hover {
  color:           #1a5c8a;
  text-decoration: underline;
}

/* ── Global scrollbar (Firefox) ──────────────────────────────────────────── */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-light) transparent;
}

/* ── Focus visible ───────────────────────────────────────────────────────── */
:focus-visible {
  outline:        2px solid var(--gold-dim);
  outline-offset: 2px;
  border-radius:  3px;
}

/* ── Info button (header) ────────────────────────────────────────────────── */
.info-btn {
  flex-shrink:   0;
  background:    none;
  border:        1px solid var(--border);
  border-radius: 6px;
  color:         var(--text-muted);
  cursor:        pointer;
  line-height:   0;
  padding:       0.35rem;
  transition:    color 0.15s, border-color 0.15s, background 0.15s;
}
.info-btn svg  { width: 18px; height: 18px; }
.info-btn:hover {
  color:        var(--gold);
  border-color: var(--gold-dim);
  background:   var(--gold-glow);
}

/* ── Info overlay & panel ────────────────────────────────────────────────── */
.info-overlay {
  position:        fixed;
  inset:           0;
  background:      rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index:         300;
  display:         flex;
  align-items:     center;
  justify-content: center;
  padding:         1rem;
  opacity:         0;
  pointer-events:  none;
  transition:      opacity 0.2s ease;
}
.info-overlay.open {
  opacity:        1;
  pointer-events: auto;
}

.info-panel {
  background:     var(--canvas);
  border-radius:  12px;
  max-width:      720px;
  width:          100%;
  max-height:     88vh;
  display:        flex;
  flex-direction: column;
  overflow:       hidden;
  box-shadow:     0 24px 64px rgba(0, 0, 0, 0.45);
  position:       relative;
  transform:      scale(0.96) translateY(10px);
  transition:     transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
.info-overlay.open .info-panel {
  transform: scale(1) translateY(0);
}

.info-close {
  position:      absolute;
  top:           1rem;
  right:         1rem;
  background:    none;
  border:        none;
  border-radius: 6px;
  color:         var(--canvas-muted);
  cursor:        pointer;
  line-height:   0;
  padding:       0.3rem;
  transition:    color 0.15s, background 0.15s;
  z-index:       1;
}
.info-close svg { width: 16px; height: 16px; }
.info-close:hover {
  color:      var(--canvas-text);
  background: var(--canvas-2);
}

.info-body {
  flex:       1;
  overflow-y: auto;
  padding:    2rem 2rem 2.5rem;
}
.info-body::-webkit-scrollbar { width: 5px; }
.info-body::-webkit-scrollbar-track { background: transparent; }
.info-body::-webkit-scrollbar-thumb {
  background:    var(--canvas-border);
  border-radius: 3px;
}

.info-loading-wrap {
  display:     flex;
  align-items: center;
  gap:         0.6rem;
  color:       var(--canvas-muted);
  font-style:  italic;
  font-size:   0.9rem;
  padding:     3rem 0;
  justify-content: center;
}

/* Info content typography */
.info-heading {
  font-family:   var(--font-serif);
  font-size:     1.6rem;
  font-weight:   600;
  color:         var(--canvas-text);
  margin-bottom: 0.85rem;
  padding-right: 2rem;
}

.info-description {
  font-size:     0.9rem;
  color:         var(--canvas-muted);
  line-height:   1.75;
  margin-bottom: 1.75rem;
}

/* Stats grid */
.info-stats-grid {
  display:               grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap:                   0.75rem;
  margin-bottom:         2rem;
}

.info-stat-card {
  background:    #ffffff;
  border:        1px solid var(--canvas-border);
  border-radius: 8px;
  padding:       0.85rem 1rem;
  display:       flex;
  flex-direction: column;
  gap:           0.2rem;
}

.info-stat-num {
  font-family: var(--font-serif);
  font-size:   1.45rem;
  font-weight: 600;
  color:       var(--canvas-text);
  line-height: 1.1;
}

.info-stat-label {
  font-size:      0.68rem;
  font-weight:    600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color:          var(--canvas-muted);
}

/* Section heading */
.info-section-heading {
  font-size:      0.68rem;
  font-weight:    600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color:          var(--canvas-muted);
  margin-bottom:  0.65rem;
  border-bottom:  1px solid var(--canvas-border);
  padding-bottom: 0.4rem;
}

/* Source rows */
.source-list {
  display:        flex;
  flex-direction: column;
  gap:            0.55rem;
}

.source-row {
  display:        flex;
  flex-direction: column;
  gap:            0.18rem;
}

.source-name-row {
  display:         flex;
  justify-content: space-between;
  align-items:     baseline;
  gap:             0.5rem;
}

.source-name {
  font-size:  0.84rem;
  color:      var(--canvas-text);
  min-width:  0;
  overflow:   hidden;
  text-overflow: ellipsis;
  white-space:   nowrap;
}

.source-count {
  font-size:   0.78rem;
  font-weight: 600;
  color:       var(--canvas-muted);
  flex-shrink: 0;
}

.source-bar-wrap {
  height:        5px;
  background:    var(--canvas-2);
  border-radius: 3px;
  overflow:      hidden;
}

.source-bar {
  height:        100%;
  background:    var(--word-gold);
  border-radius: 3px;
  transition:    width 0.4s ease;
  min-width:     2px;
}

/* Methodology blocks */
.info-method-blocks {
  display:        flex;
  flex-direction: column;
  gap:            1.25rem;
}

.info-method-block {
  background:    var(--canvas-2);
  border:        1px solid var(--canvas-border);
  border-radius: 8px;
  padding:       1rem 1.1rem;
}

.info-method-title {
  font-size:     0.76rem;
  font-weight:   700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color:         var(--canvas-text);
  margin-bottom: 0.45rem;
  display:       flex;
  align-items:   center;
  gap:           0.5rem;
}

.info-ai-badge {
  font-size:      0.6rem;
  font-weight:    600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background:     #dbeafe;
  color:          #1e40af;
  border:         1px solid #bfdbfe;
  border-radius:  4px;
  padding:        0.1rem 0.4rem;
}

.info-method-body {
  font-size:   0.86rem;
  color:       var(--canvas-muted);
  line-height: 1.7;
  margin:      0;
}

.info-link {
  color:           var(--canvas-text);
  text-decoration: underline;
  text-decoration-color: var(--canvas-border);
  text-underline-offset: 2px;
  transition: text-decoration-color 0.15s;
}
.info-link:hover {
  text-decoration-color: var(--canvas-text);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .site-title    { font-size: 0.9rem; }
  .search-submit { display: none; }
  .filter-bar    { gap: 0.5rem; padding: 0 0.75rem; }
  .header-inner  { padding: 0 0.75rem; gap: 0.75rem; }
  .drawer        { height: 78vh; }
  .drawer-heading { font-size: 1.1rem; }
  .result-card   { padding: 0.75rem; }
  .result-title  { font-size: 0.9rem; }
  .modal         { max-height: 92vh; }
  .modal-header  { padding: 1rem; }
  .modal-body    { padding: 1rem; }
  .cloud-legend  { display: none; }
}

@media (max-width: 400px) {
  .site-icon    { display: none; }
  .filter-label { display: none; }
  .filter-stats { display: none; }
}

/* ── Trends toggle button ─────────────────────────────────────────────────── */
.trends-toggle-btn {
  display:      flex;
  align-items:  center;
  gap:          0.35rem;
  margin-left:  auto;
  padding:      0.25rem 0.75rem;
  background:   transparent;
  border:       1px solid var(--border-light);
  border-radius: 999px;
  color:        var(--text-muted);
  font-size:    0.78rem;
  font-family:  var(--font-sans);
  cursor:       pointer;
  transition:   background 0.15s, color 0.15s, border-color 0.15s;
  white-space:  nowrap;
  flex-shrink:  0;
}
.trends-toggle-btn:hover {
  background:   var(--surface-2);
  color:        var(--text);
  border-color: var(--gold-dim);
}
.trends-toggle-btn.active,
.trends-toggle-btn[aria-pressed="true"] {
  background:   var(--gold-glow);
  border-color: var(--gold);
  color:        var(--gold-bright);
}

/* ── Drawer sparkline ─────────────────────────────────────────────────────── */
.drawer-sparkline {
  grid-column: 1 / -1;
  padding: 0.5rem 1.25rem 0.25rem;
  min-height: 80px;
}
.drawer-sparkline:empty { min-height: 0; padding: 0; }
.sparkline-svg { display: block; overflow: visible; }

/* ── Related keyword chips ────────────────────────────────────────────────── */
.drawer-related {
  grid-column: 1 / -1;
  display:     flex;
  flex-wrap:   wrap;
  align-items: center;
  gap:         0.35rem;
  padding:     0.25rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--canvas-border);
}
.related-label {
  font-size:  0.72rem;
  color:      var(--canvas-muted);
  font-weight: 500;
  white-space: nowrap;
  margin-right: 0.15rem;
}
.related-chip {
  display:      inline-flex;
  align-items:  center;
  gap:          0.25rem;
  padding:      0.2rem 0.55rem 0.2rem 0.4rem;
  background:   var(--canvas-2);
  border:       1px solid var(--canvas-border);
  border-radius: 999px;
  font-size:    0.75rem;
  color:        var(--canvas-text);
  cursor:       pointer;
  font-family:  var(--font-sans);
  transition:   background 0.12s, border-color 0.12s;
}
.related-chip:hover {
  background:   #e0e0e0;
  border-color: var(--chip-color, #aaa);
}
.related-chip.active {
  background:   var(--chip-color, #888);
  border-color: var(--chip-color, #888);
  color:        #fff;
}
.related-chip.active:hover {
  filter: brightness(1.12);
}
.chip-dot {
  width:         7px;
  height:        7px;
  border-radius: 50%;
  background:    var(--chip-color, #888);
  flex-shrink:   0;
}
.related-chip.active .chip-dot {
  background: rgba(255, 255, 255, 0.75);
}

/* ── Trends panel ─────────────────────────────────────────────────────────── */
.trends-panel {
  position: absolute;
  inset:    0;
  display:  flex;
  flex-direction: column;
  background: var(--canvas);
  overflow: hidden;
  z-index: 2;
}
.trends-panel[hidden] { display: none; }

.trends-header {
  flex-shrink: 0;
  padding: 1rem 1.5rem 0.75rem;
  background: var(--canvas);
  border-bottom: 1px solid var(--canvas-border);
}
.trends-header-top {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.trends-title {
  font-family: var(--font-serif);
  font-size:   1.1rem;
  font-weight: 600;
  color:       var(--canvas-text);
}
.trends-sub {
  font-size: 0.78rem;
  color:     var(--canvas-muted);
}
.trends-selector-wrap {
  position: relative;
  max-width: 360px;
  margin-bottom: 0.65rem;
}
.trends-search-field {
  display:     flex;
  align-items: center;
  gap:         0.5rem;
  padding:     0.35rem 0.75rem;
  background:  #fff;
  border:      1px solid var(--canvas-border);
  border-radius: 999px;
  color:       var(--canvas-muted);
}
.trends-search-input {
  flex:        1;
  border:      none;
  outline:     none;
  background:  transparent;
  font-size:   0.85rem;
  color:       var(--canvas-text);
  font-family: var(--font-sans);
}
.trends-suggestions {
  position:   absolute;
  top:        calc(100% + 4px);
  left:       0;
  right:      0;
  background: #fff;
  border:     1px solid var(--canvas-border);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  z-index:    10;
  overflow:   hidden;
}
.trends-sugg-item {
  display:    block;
  width:      100%;
  text-align: left;
  padding:    0.5rem 0.9rem;
  font-size:  0.83rem;
  color:      var(--canvas-text);
  background: transparent;
  border:     none;
  cursor:     pointer;
  font-family: var(--font-sans);
}
.trends-sugg-item:hover { background: var(--canvas-2); }

.trends-legend {
  display:     flex;
  flex-wrap:   wrap;
  align-items: center;
  gap:         0.5rem;
  min-height:  24px;
}
.trends-empty-hint {
  font-size: 0.78rem;
  color:     var(--canvas-muted);
  font-style: italic;
}
.trends-legend-item {
  display:      inline-flex;
  align-items:  center;
  gap:          0.35rem;
  padding:      0.2rem 0.6rem 0.2rem 0.45rem;
  background:   var(--canvas-2);
  border:       1px solid var(--canvas-border);
  border-radius: 999px;
  font-size:    0.78rem;
  color:        var(--canvas-text);
}
.trends-legend-dot {
  width:         8px;
  height:        8px;
  border-radius: 50%;
  flex-shrink:   0;
}
.trends-legend-remove {
  background:  transparent;
  border:      none;
  cursor:      pointer;
  font-size:   0.7rem;
  color:       var(--canvas-muted);
  padding:     0 0 0 0.2rem;
  line-height: 1;
}
.trends-legend-remove:hover { color: var(--canvas-text); }

.trends-chart-area {
  flex:     1;
  position: relative;
  overflow: hidden;
  padding:  0.25rem 0.5rem 0.25rem 0;
}
.trends-no-data {
  position:   absolute;
  inset:      0;
  display:    flex;
  align-items: center;
  justify-content: center;
  font-size:  0.9rem;
  color:      var(--canvas-muted);
  font-style: italic;
}
.trends-axis text  { fill: var(--canvas-muted); font-size: 11px; }
.trends-axis path,
.trends-axis line  { stroke: var(--canvas-border); }
.trends-grid line  { stroke: var(--canvas-border); stroke-dasharray: 3,3; }
.trends-grid .domain { display: none; }
.trends-crosshair  { stroke: #aaa; stroke-width: 1; stroke-dasharray: 4,3; pointer-events: none; }

.trends-tooltip {
  position:   absolute;
  display:    none;
  background: rgba(255,255,255,0.96);
  border:     1px solid var(--canvas-border);
  border-radius: 8px;
  padding:    0.5rem 0.75rem;
  font-size:  0.78rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  pointer-events: none;
  z-index:    10;
  min-width:  130px;
}
.tt-year  { font-weight: 600; color: var(--canvas-text); margin-bottom: 0.3rem; }
.tt-row   { display: flex; align-items: center; gap: 0.4rem; margin-top: 0.15rem; }
.tt-dot   { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.tt-label { flex: 1; color: var(--canvas-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 110px; }
.tt-val   { font-weight: 600; color: var(--canvas-text); }