:root {
  --bg: #f4f6f8;
  --bg-card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --score-high: #059669;
  --score-med: #d97706;
  --score-low: #64748b;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius: 14px;
  --font: "Segoe UI", "Noto Sans Tamil", "Latha", system-ui, sans-serif;
  --font-scale: 1;
  --line-height: 1.75;
  --sticky-header-height: 120px;
  --reader-content-width: 720px;
  --mark-bg: #fde68a;
  --mark-current: #facc15;
}

[data-theme="dark"] {
  --bg: #0b1220;
  --bg-card: #111827;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: #1f2937;
  --accent: #2dd4bf;
  --accent-soft: #134e4a;
  --shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
  --mark-bg: #854d0e;
  --mark-current: #a16207;
}

[data-theme="sepia"] {
  --bg: #f4ecd8;
  --bg-card: #fbf6ea;
  --text: #3d2f1e;
  --muted: #7a6548;
  --border: #dcc9a8;
  --accent: #8b5a2b;
  --accent-soft: #efe2c6;
  --shadow: 0 10px 30px rgba(61, 47, 30, 0.12);
  --mark-bg: #f5d76e;
  --mark-current: #eab308;
}

[data-theme="night"] {
  --bg: #05070d;
  --bg-card: #0c1220;
  --text: #dbe4f0;
  --muted: #7f8ea3;
  --border: #1a2436;
  --accent: #38bdf8;
  --accent-soft: #0f2740;
  --shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
  --mark-bg: #854d0e;
  --mark-current: #a16207;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  font-size: calc(1rem * var(--font-scale));
  font-weight: 400;
  background:
    radial-gradient(1200px 500px at 10% -10%, color-mix(in srgb, var(--accent) 18%, transparent), transparent),
    radial-gradient(900px 400px at 100% 0%, color-mix(in srgb, #6366f1 12%, transparent), transparent),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: var(--line-height);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  padding: 20px 20px 8px;
  max-width: 920px;
  margin: 0 auto;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand-block {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}
.brand-home-btn {
  background: none;
  border: none;
  font-family: inherit;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  color: var(--text);
  padding: 0;
  text-align: left;
}
.brand-home-btn:hover { color: var(--accent); }
.tagline {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  position: relative;
}
.settings-wrap {
  position: relative;
}
.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
}
.settings-panel {
  position: fixed;
  top: 56px;
  right: 16px;
  z-index: 200;
  width: 280px;
  max-height: min(80vh, 560px);
  overflow: auto;
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
}
.settings-panel.hidden { display: none; }
.history-panel { width: 300px; }
.history-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}
.history-panel-head .settings-label { margin-bottom: 0; }
.history-clear-btn {
  border: none;
  background: transparent;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}
.history-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 320px;
  overflow: auto;
}
.history-empty {
  color: var(--muted);
  font-size: 0.85rem;
  padding: 8px 0;
}
.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--text);
  padding: 8px 6px;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
}
.history-item:hover {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}
.history-q {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9rem;
}
.history-mode {
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
}
.font-family-switch {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}
.font-family-btn {
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 55%, var(--bg-card));
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  text-align: left;
  padding: 0 12px;
}
.font-family-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.font-family-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.settings-section + .settings-section {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.settings-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.font-size-control {
  display: flex;
  gap: 8px;
}
.ctrl-btn {
  flex: 1;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 55%, var(--bg-card));
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}
.ctrl-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.theme-switch {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.theme-btn {
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 55%, var(--bg-card));
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
}
.theme-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.theme-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.sem-ai-badge {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--muted);
}
.sem-ai-badge.hidden { display: none; }
.sem-ai-ready {
  color: var(--score-high);
  border-color: color-mix(in srgb, var(--score-high) 40%, var(--border));
}
.sem-ai-loading { opacity: 0.8; }

.main {
  max-width: 920px;
  margin: 0 auto;
  padding: 8px 20px 48px;
}

.search-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}
.search-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--bg-card);
}
.header-lang-toggle {
  flex-shrink: 0;
}
.header-lang-toggle .lang-btn {
  padding: 7px 10px;
  font-size: 0.75rem;
}
.lang-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 8px 12px;
  cursor: pointer;
}
.lang-btn:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.lang-btn.active {
  background: color-mix(in srgb, var(--accent) 22%, var(--bg-card));
  color: var(--text);
}
.search-mode-group {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 0;
}
.mode-btn.disabled,
.mode-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.mode-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 8px 14px;
  cursor: pointer;
}
.mode-btn:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.mode-btn.active {
  background: var(--accent);
  color: #fff;
}

.search-type-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}
.search-type-row.hidden { display: none; }
.min-occ-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}
.min-occ-input {
  width: 7rem;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 55%, var(--bg-card));
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.85rem;
  font-family: inherit;
}
.min-occ-help {
  position: relative;
}
.min-occ-help-summary {
  list-style: none;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
}
.min-occ-help-summary::-webkit-details-marker { display: none; }
.min-occ-help-summary:hover,
.min-occ-help[open] .min-occ-help-summary {
  color: var(--accent);
  border-color: var(--accent);
}
.min-occ-help-body {
  flex-basis: 100%;
  margin: 4px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-card) 88%, var(--accent));
  color: var(--text);
  font-size: 0.82rem;
  line-height: 1.45;
}
.min-occ-help-body p {
  margin: 0 0 0.45rem;
}
.min-occ-help-body p:last-child {
  margin-bottom: 0;
}
.min-occ-help-body code {
  font-size: 0.9em;
  padding: 0.05em 0.35em;
  border-radius: 4px;
  background: color-mix(in srgb, var(--bg) 70%, transparent);
}
.min-occ-row:has(.min-occ-help[open]) {
  align-items: flex-start;
}
.min-occ-row:has(.min-occ-help[open]) .min-occ-help {
  flex-basis: 100%;
}
.search-type-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 2px;
}
.search-type-btn {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 55%, var(--bg-card));
  color: var(--text);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.search-type-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.search-type-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.search-row {
  display: flex;
  gap: 10px;
}
#search-input {
  flex: 1;
  min-width: 0;
  height: 48px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 55%, var(--bg-card));
  color: var(--text);
  padding: 0 14px;
  font-size: 1rem;
  font-family: inherit;
}
#search-input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-color: var(--accent);
}
.search-btn {
  height: 48px;
  padding: 0 18px;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}
.search-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.concept-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.chip {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--bg-card));
  color: var(--text);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: inherit;
}
.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.concept-dropdown {
  margin-top: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  overflow: hidden;
  z-index: 50;
}
.concept-dropdown.hidden { display: none; }
.concept-dropdown-hint {
  padding: 10px 14px;
  color: var(--muted);
  font-size: 0.88rem;
}
.concept-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
  cursor: pointer;
}
.concept-dropdown-item:hover {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
}
.concept-dropdown-icon {
  flex-shrink: 0;
  font-size: 0.9rem;
}

.status-bar {
  margin: 16px 2px 8px;
  color: var(--muted);
  font-size: 0.92rem;
  min-height: 1.4em;
}

.results { display: flex; flex-direction: column; gap: 14px; }

.result-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.result-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px 4px;
}
.result-group-title {
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.35;
  min-width: 0;
}
.result-group-count {
  flex-shrink: 0;
  min-width: 28px;
  height: 28px;
  padding: 0 8px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
}
.result-group-meta {
  margin: 0;
  padding: 0 16px 10px;
  color: var(--muted);
  font-size: 0.8rem;
}
.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow);
}
.result-card--grouped {
  border: none;
  border-top: 1px solid var(--border);
  border-radius: 0;
  box-shadow: none;
  margin: 0;
}
.result-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.result-head-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}
.para-occ {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #9a3412;
  background: color-mix(in srgb, #f59e0b 22%, transparent);
  padding: 2px 8px;
  border-radius: 999px;
}
.result-title {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.35;
}
.result-meta {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}
.score-badge {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--muted) 14%, transparent);
  color: var(--muted);
}
.score-badge.high { color: var(--score-high); background: color-mix(in srgb, var(--score-high) 14%, transparent); }
.score-badge.med { color: var(--score-med); background: color-mix(in srgb, var(--score-med) 14%, transparent); }

.result-text {
  margin: 0;
  font-size: 0.98rem;
  white-space: pre-wrap;
  word-break: break-word;
}
.result-text mark {
  background: #fde68a;
  color: inherit;
  padding: 0 2px;
  border-radius: 3px;
}
[data-theme="dark"] .result-text mark {
  background: #854d0e;
  color: #fef3c7;
}
.result-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
}
.para-label {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.read-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}
.read-link:hover { text-decoration: underline; }

.load-more-wrap {
  display: flex;
  justify-content: center;
  padding: 8px 0 24px;
}
.load-more-btn {
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  border-radius: 999px;
  padding: 10px 18px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}
.load-more-btn:disabled { opacity: 0.6; cursor: wait; }

.empty, .loading, .error, .banner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  color: var(--muted);
}

.ai-load-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: color-mix(in srgb, var(--bg) 55%, rgba(0, 0, 0, 0.55));
  backdrop-filter: blur(4px);
}
.ai-load-modal.hidden { display: none; }
.ai-load-card {
  width: min(440px, 100%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: 22px 22px 18px;
}
.ai-load-kicker {
  margin: 0 0 6px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}
.ai-load-card h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  line-height: 1.35;
  color: var(--text);
}
.ai-load-lead {
  margin: 0 0 16px;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}
.ai-load-bar-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.ai-load-bar {
  flex: 1;
  height: 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, var(--border));
  overflow: hidden;
}
.ai-load-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #38bdf8));
  transition: width 0.2s ease;
}
.ai-load-bar-fill.indeterminate {
  width: 35% !important;
  animation: ai-load-slide 1.1s ease-in-out infinite;
}
@keyframes ai-load-slide {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(320%); }
}
.ai-load-pct {
  min-width: 3.2em;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.ai-load-status {
  margin: 0 0 14px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}
.ai-load-steps {
  margin: 0 0 14px;
  padding: 0 0 0 1.15rem;
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.4;
}
.ai-load-steps li {
  transition: color 0.15s ease;
}
.ai-load-steps li.is-done {
  color: var(--score-high);
}
.ai-load-steps li.is-active {
  color: var(--text);
  font-weight: 700;
}
.ai-load-steps li.is-pending {
  opacity: 0.75;
}
.ai-load-note {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}
.error, .banner.warn {
  color: #b45309;
  border-color: color-mix(in srgb, #b45309 35%, var(--border));
}

.site-footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 16px 20px 40px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 16px;
  margin-bottom: 12px;
}
.footer-links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.footer-links a:hover { text-decoration: underline; }
.footer-copy,
.footer-contact {
  margin: 0 0 6px;
}
.footer-contact {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 12px;
}
.footer-contact a {
  color: var(--muted);
  text-decoration: none;
}
.footer-contact a:hover {
  color: var(--accent);
  text-decoration: underline;
}

@media (max-width: 640px) {
  .search-row { flex-direction: column; }
  .search-btn { width: 100%; }
  .brand-home-btn { font-size: 1rem; }
  .result-head { flex-direction: column; align-items: flex-start; }
}

.hidden { display: none !important; }

.font-scale-group {
  display: inline-flex;
  gap: 4px;
}

/* ── Reading mode chrome ── */
body.is-reading .site-header .tagline,
body.is-reading #search-main,
body.is-reading #site-footer {
  display: none !important;
}

body.is-reading .site-header {
  padding-bottom: 4px;
}

.reading-progress-bar {
  height: 3px;
  background: var(--border);
  pointer-events: none;
  position: sticky;
  top: 0;
  z-index: 100;
}
.reading-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.12s ease-out;
}

.reader-nav-bar {
  position: sticky;
  top: 0;
  z-index: 90;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
}
.reader-scope-bar {
  border-top: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
  padding: 0.45rem 1rem 0.55rem;
}
.reader-scope-bar.hidden {
  display: none !important;
}
.reader-scope-bar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.9rem;
  max-width: 920px;
  margin: 0 auto;
}
.reader-scope-note {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}
.preview-scope-toggle {
  display: inline-flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  flex-shrink: 0;
}
.scope-btn {
  display: inline-block;
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}
.scope-btn:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.scope-btn.active {
  background: var(--accent);
  color: #0f172a;
}
.reader-nav-bar-inner {
  display: grid;
  grid-template-columns: 1fr minmax(0, var(--reader-content-width)) 1fr;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  max-width: 1100px;
  margin: 0 auto;
}
.reader-nav-side--left { justify-self: start; }
.reader-nav-side--right {
  justify-self: end;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.reader-search-toggle {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--muted);
  cursor: pointer;
  flex-shrink: 0;
  font-size: 0.9rem;
  line-height: 1;
}
.reader-search-toggle:hover,
.reader-search-toggle[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.reader-search-form {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.reader-search-form.hidden { display: none; }
.reader-search-input {
  width: min(180px, 28vw);
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  padding: 0 28px 0 10px;
  font-size: 0.85rem;
  font-family: inherit;
}
.reader-search-input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-color: var(--accent);
}
.reader-search-clear {
  margin-left: -30px;
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  z-index: 1;
}
.reader-search-clear:hover { color: var(--accent); }

.reader-chapter-nav {
  display: grid;
  grid-template-columns: auto 32px minmax(0, 1fr) 32px;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.reader-autoscroll {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}
.autoscroll-btn {
  width: calc(28px * var(--font-scale));
  height: calc(28px * var(--font-scale));
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--muted);
  border-radius: 8px;
  font-size: calc(11px * var(--font-scale));
  line-height: 1;
  cursor: pointer;
  padding: 0;
}
.autoscroll-btn:hover,
.autoscroll-btn.is-active {
  border-color: var(--accent);
  color: var(--accent);
}
.autoscroll-btn.is-active {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}
.autoscroll-speed {
  height: calc(28px * var(--font-scale));
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--muted);
  border-radius: 8px;
  font-size: calc(11px * var(--font-scale));
  padding: 0 4px;
  min-width: 84px;
  max-width: 96px;
  cursor: pointer;
  font-family: inherit;
}

.reader-back-compact {
  flex-shrink: 0;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--muted);
  border-radius: 8px;
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
}
.reader-back-compact:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.reader-chapter-search {
  flex-shrink: 0;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}
.reader-chapter-search.is-empty { color: #b45309; }

.reader-title {
  font-size: clamp(0.9rem, 2.2vw, 1.1rem);
  margin: 0;
  font-weight: 700;
  text-align: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border: none;
  background: transparent;
  color: var(--text);
  cursor: default;
  padding: 4px 8px;
  border-radius: 8px;
  font-family: inherit;
}

.reader-ch-nav {
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  border-radius: 8px;
  width: 32px;
  height: 32px;
  font-size: 15px;
  cursor: pointer;
  flex-shrink: 0;
}
.reader-ch-nav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.reader-ch-nav:not(:disabled):hover {
  border-color: var(--accent);
  color: var(--accent);
}

.reader-panel {
  max-width: var(--reader-content-width);
  margin: 8px auto 48px;
  padding: 0 16px;
  padding-right: 72px;
}
.reader-toolbar-bottom {
  margin-top: 20px;
  margin-bottom: 48px;
}
.reader-toolbar-bottom .reader-chapter-nav {
  padding-top: 8px;
  border-top: 1px solid color-mix(in srgb, var(--border) 45%, transparent);
}

.reader-body {
  font-family: var(--font);
  font-size: calc(1.05rem * var(--font-scale));
  line-height: var(--line-height);
  font-weight: 400;
}

.reader-para {
  margin-bottom: 14px;
  padding: 6px 8px;
  border-radius: 8px;
  scroll-margin-top: calc(var(--sticky-header-height, 120px) + 12px);
}
.reader-para--target {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  outline: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}
.reader-para-num {
  color: var(--muted);
  font-size: calc(0.75rem * var(--font-scale));
  font-weight: 700;
  margin-right: 8px;
  user-select: text;
}
.reader-para-text {
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

.reader-body mark {
  background: var(--mark-bg);
  color: inherit;
  padding: 0 2px;
  border-radius: 3px;
}
.reader-body mark.mark--current {
  background: var(--mark-current);
  outline: 2px solid var(--accent);
  border-radius: 2px;
}

.reader-goto-top,
.page-goto-top {
  position: fixed;
  right: 16px;
  bottom: 88px;
  z-index: 95;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  border-radius: 10px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.page-goto-top { bottom: 24px; }
.reader-goto-top:hover,
.page-goto-top:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.occ-nav-fixed {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 95;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 10px;
  background: color-mix(in srgb, var(--bg-card) 92%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  min-width: 72px;
}
.reader-occ-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 4px 0;
}
.reader-occ-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.reader-occ-hint {
  font-size: 0.65rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.3;
  max-width: 80px;
}
.occ-btn {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: 8px;
  width: 40px;
  height: 36px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}
.occ-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.occ-btn:not(:disabled):hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
}

@media (max-width: 640px) {
  .reader-nav-bar-inner {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .reader-nav-side--left,
  .reader-nav-side--right {
    justify-self: stretch;
  }
  .reader-chapter-search {
    width: 100%;
    text-align: center;
  }
  .reader-panel { padding-right: 16px; }
  .reader-goto-top {
    right: 8px;
    bottom: 96px;
    width: 36px;
    height: 36px;
  }
  .occ-nav-fixed {
    right: 8px;
    padding: 10px 8px;
    min-width: 60px;
  }
  .reader-toolbar-bottom { margin-bottom: 64px; }
}