/* InterpretCognates — neutral academic blog layout */

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

:root {
  --text-col: 780px;
  --figure-col: 1100px;
  --max-page: 1200px;
  --serif: Georgia, "Times New Roman", Times, serif;
  --sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;

  --fg: #1c1c1c;
  --fg-muted: #4a4a4a;
  --fg-dim: #7a7a7a;
  --bg: #ffffff;
  --bg-card: #f8f8f8;
  --bg-code: #f3f3f3;
  --border: #dcdcdc;
  --accent: #2c5282;
  --accent-light: #ebf1fa;
  --link: #2c5282;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ── Article container ─────────────────────────────────────── */
.article {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Header ────────────────────────────────────────────────── */
.article-header {
  max-width: var(--text-col);
  margin: 60px auto 0;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.article-header .overline {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.article-header h1 {
  font-family: var(--serif);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.18;
  color: var(--fg);
  margin-bottom: 20px;
}

.article-header .subtitle {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--fg-muted);
  max-width: 620px;
}

.article-header .meta {
  margin-top: 24px;
  font-size: 0.88rem;
  color: var(--fg-dim);
}

/* ── Table of contents ─────────────────────────────────────── */
.toc {
  max-width: var(--text-col);
  margin: 40px auto;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.toc h2 {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 14px;
}

.toc ol {
  list-style: none;
  counter-reset: toc;
  padding: 0;
}

.toc li {
  counter-increment: toc;
  margin-bottom: 6px;
}

.toc li::before {
  content: counter(toc) ".";
  display: inline-block;
  width: 26px;
  color: var(--fg-dim);
  font-size: 0.88rem;
  font-weight: 500;
}

.toc a {
  color: var(--fg);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s;
}

.toc a:hover { color: var(--accent); }

/* ── Prose sections ────────────────────────────────────────── */
.prose {
  max-width: var(--text-col);
  margin: 0 auto;
}

.prose h2 {
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.25;
  margin: 56px 0 16px;
  padding-top: 20px;
}

.prose h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 40px 0 12px;
}

.prose p {
  margin-bottom: 18px;
}

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

.prose ul, .prose ol {
  margin: 0 0 18px 24px;
}

.prose li {
  margin-bottom: 6px;
}

.prose strong {
  font-weight: 650;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 3px;
}

/* ── Callout boxes ─────────────────────────────────────────── */
.callout {
  max-width: var(--text-col);
  margin: 28px auto;
  padding: 20px 24px;
  border-left: 3px solid var(--accent);
  background: var(--accent-light);
  border-radius: 0 4px 4px 0;
}

.callout .callout-label {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.callout p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--fg);
  margin: 0;
}

.callout p + p { margin-top: 10px; }

/* ── Figure containers ─────────────────────────────────────── */
.figure {
  max-width: var(--figure-col);
  margin: 36px auto;
}

.figure-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px;
  overflow: hidden;
}

.figure-caption {
  max-width: var(--text-col);
  margin: 12px auto 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--fg-muted);
}

.figure-caption strong {
  color: var(--fg);
  font-weight: 650;
}

.figure-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 700px) {
  .figure-row { grid-template-columns: 1fr; }
}

/* Plotly chart containers */
.chart {
  width: 100%;
  min-height: 500px;
}

.chart-short { min-height: 400px; }
.chart-tall { min-height: 740px; }

.dendro-scroll-outer {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ── Stat badges ───────────────────────────────────────────── */
.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0;
}

.stat-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 20px;
  min-width: 120px;
}

.stat-badge .stat-value {
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--fg);
}

.stat-badge .stat-label {
  font-size: 0.78rem;
  color: var(--fg-dim);
  margin-top: 4px;
  text-align: center;
}

.stat-badge.significant {
  border-color: #22c55e;
  background: #f0fdf4;
}

.stat-badge.significant .stat-value { color: #15803d; }

/* ── Translation table ─────────────────────────────────────── */
.translation-grid {
  columns: 3;
  column-gap: 24px;
  margin: 16px 0;
}

.family-group {
  break-inside: avoid;
  margin-bottom: 6px;
}

.family-header {
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 0 1px 0;
  color: var(--fg-dim);
  border-left: none;
  margin-bottom: 0;
}

.trans-line {
  display: flex;
  align-items: baseline;
  gap: 0;
  padding: 2px 0;
  line-height: 1.45;
  white-space: nowrap;
  overflow: hidden;
}

.trans-lang {
  font-weight: 500;
  font-size: 0.72rem;
  width: 140px;
  min-width: 140px;
  flex-shrink: 0;
  color: var(--fg-dim);
  text-align: right;
  padding-right: 20px;
  box-sizing: border-box;
}

.trans-text {
  font-size: 0.95rem;
  color: var(--fg);
  overflow: hidden;
  text-overflow: ellipsis;
}

.trans-word {
  color: var(--accent);
  font-weight: 700;
}

.translation-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 10px;
  font-size: 0.88rem;
  line-height: 1.4;
}

.lang-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Hypothesis / question boxes ───────────────────────────── */
.hypothesis-box {
  max-width: var(--text-col);
  margin: 24px auto;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
}

.hypothesis-box .hypothesis-label {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.hypothesis-box p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

/* ── Interactive explorer section ──────────────────────────── */
.explorer {
  max-width: var(--figure-col);
  margin: 48px auto;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.explorer h2 {
  font-family: var(--serif);
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.explorer p.desc {
  color: var(--fg-muted);
  font-size: 0.92rem;
  margin-bottom: 20px;
}

.explorer-controls {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  gap: 12px;
  margin-bottom: 16px;
}

.explorer-controls label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--fg-muted);
}

.explorer-controls input,
.explorer-controls select {
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 8px 10px;
  font-size: 0.92rem;
  font-family: var(--sans);
  background: var(--bg);
}

.explorer-controls .full-span {
  grid-column: 1 / -1;
}

.explorer-btn {
  border: none;
  border-radius: 4px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  padding: 10px 20px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s;
}

.explorer-btn:hover { background: #1e3a5f; }
.explorer-btn:disabled { background: var(--fg-dim); cursor: not-allowed; }

/* ── Loading states ────────────────────────────────────────── */
.loading-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--fg-dim);
  font-size: 0.92rem;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-right: 10px;
}

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

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 780px) {
  .article-header h1 { font-size: 2rem; }
  .prose h2 { font-size: 1.4rem; }
  .figure { max-width: 100%; }
  .explorer-controls { grid-template-columns: 1fr; }
  body { font-size: 16px; }
}

/* ── Section divider ───────────────────────────────────────── */
.section-divider {
  max-width: var(--text-col);
  margin: 48px auto;
  border: none;
  border-top: 1px solid var(--border);
}

/* ── Footer ────────────────────────────────────────────────── */
.article-footer {
  max-width: var(--text-col);
  margin: 60px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--fg-dim);
  line-height: 1.6;
}

/* ── Swadesh ranking inline table ──────────────────────────── */
.ranking-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 16px 0;
}

.ranking-table th {
  text-align: left;
  font-weight: 650;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-dim);
  padding: 8px 10px;
  border-bottom: 2px solid var(--border);
}

.ranking-table td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
}

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

.ranking-table .rank-num {
  font-weight: 700;
  color: var(--fg-dim);
  width: 36px;
}

.ranking-table .bar-cell {
  width: 180px;
}

.inline-bar {
  height: 14px;
  border-radius: 2px;
  background: var(--accent);
  opacity: 0.6;
}

/* ── Improvement arrow display (conceptual store) ─────────── */
.improvement-display {
  display: flex;
  align-items: center;
  gap: 24px;
  margin: 20px 0;
  flex-wrap: wrap;
  max-width: var(--text-col);
  margin-left: auto;
  margin-right: auto;
}

.ratio-box {
  text-align: center;
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  min-width: 140px;
}

.ratio-box .ratio-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 4px;
}

.ratio-box .ratio-value {
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--fg);
}

.improvement-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.improvement-arrow .arrow-icon {
  font-size: 2rem;
  line-height: 1;
}

.improvement-arrow .arrow-factor {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 800;
}

.improvement-arrow.above-threshold .arrow-icon,
.improvement-arrow.above-threshold .arrow-factor { color: #15803d; }
.improvement-arrow.below-threshold .arrow-icon,
.improvement-arrow.below-threshold .arrow-factor { color: #b45309; }

.threshold-bar-wrap {
  max-width: var(--text-col);
  margin: 0 auto;
}

.threshold-bar {
  margin-top: 8px;
  height: 28px;
  background: #f1f5f9;
  border-radius: 3px;
  position: relative;
  overflow: hidden;
  max-width: 480px;
}

.threshold-bar .fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

.threshold-bar .mark {
  position: absolute;
  top: 0;
  height: 100%;
  width: 2px;
  background: var(--fg);
}

.threshold-bar .mark-label {
  position: absolute;
  top: -18px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--fg-dim);
  transform: translateX(-50%);
}

/* ── Methodology cards ────────────────────────────────────── */
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  max-width: var(--figure-col);
  margin: 20px auto;
}

.method-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 18px;
}

.method-card h4 {
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.method-card p {
  font-size: 0.84rem;
  color: var(--fg-muted);
  line-height: 1.6;
  margin: 0;
}

/* ── Convergence scatter (all Swadesh words) ─────────────── */
.convergence-scatter-outer {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.convergence-scatter-chart {
  min-height: 900px;
  min-width: 700px;
}

/* ── Category summary chart ───────────────────────────────── */
.chart-medium { min-height: 380px; }

/* Figure 3c: scrollable list of every tested item (inlaid in main window) */
.figure-3c-scroll {
  margin-top: 20px;
  max-height: 420px;
  overflow-y: auto;
  overflow-x: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}
.figure-3c-scroll .all-items-header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: grid;
  grid-template-columns: 120px 1fr 1fr 1fr;
  gap: 8px 12px;
  padding: 10px 14px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--fg-dim);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}
.figure-3c-scroll .all-items-sort-hdr {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0;
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
}
.figure-3c-scroll .all-items-sort-hdr:hover { color: var(--accent); }
.figure-3c-scroll .sort-arrow {
  opacity: 0.4;
  font-size: 0.9em;
}
.figure-3c-scroll .sort-arrow-desc,
.figure-3c-scroll .sort-arrow-asc { opacity: 1; color: var(--accent); }
.figure-3c-scroll .all-items-row {
  display: grid;
  grid-template-columns: 120px 1fr 1fr 1fr;
  gap: 8px 12px;
  align-items: center;
  padding: 6px 14px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border);
  min-height: 36px;
}
.figure-3c-scroll .all-items-row:nth-child(even) { background: rgba(0,0,0,0.02); }
.figure-3c-scroll .all-items-row:hover { background: var(--accent-light); }
.figure-3c-scroll .all-items-concept { font-weight: 500; color: var(--fg); }
.figure-3c-scroll .all-items-bar-wrap {
  height: 18px;
  background: var(--bg-code);
  border-radius: 4px;
  overflow: hidden;
}
.figure-3c-scroll .all-items-bar {
  height: 100%;
  border-radius: 4px;
  min-width: 2px;
}
.figure-3c-scroll .all-items-na { color: var(--fg-dim); font-size: 0.85em; }

/* ── Concept map selector ─────────────────────────────────── */
.map-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.map-controls select {
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 6px 12px;
  font-size: 0.88rem;
  font-family: var(--sans);
  background: var(--bg);
}

.map-controls label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.map-control-sep {
  font-size: 0.82rem;
  color: var(--fg-dim);
  font-weight: 600;
  white-space: nowrap;
}

.concept-map-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── Result note box ──────────────────────────────────────── */
.result-note {
  max-width: var(--text-col);
  margin: 16px auto;
  padding: 14px 18px;
  background: var(--accent-light);
  border: 1px solid #c7d2fe;
  border-radius: 4px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: #3730a3;
}

.result-note.success {
  background: #f0fdf4;
  border-color: #86efac;
  color: #14532d;
}

.result-note.warning {
  background: #fffbeb;
  border-color: #fde68a;
  color: #78350f;
}

/* ── Toggle buttons (for PCA mode/label switches) ──────────── */
.vizToggle {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.toggleBtn {
  background: var(--bg-card);
  color: var(--fg-muted);
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 3px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.15s ease;
}

.toggleBtn:hover { background: #e8e8e8; }

.toggleBtn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.toggleBtn.small {
  font-size: 0.78rem;
  padding: 4px 10px;
}

/* ── Color circle controls ────────────────────────────────── */
.color-circle-controls {
  margin-bottom: 12px;
}

.color-toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.color-toggle-row:last-child {
  margin-bottom: 0;
}

.toggle-label {
  font-size: 0.84rem;
  color: var(--fg-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}

.toggle-label input[type="checkbox"] {
  accent-color: var(--accent);
}

/* ── Carrier sentence display ────────────────────────────── */
.carrier-sentence {
  margin: 12px 0 8px;
  padding: 14px 20px;
  background: var(--bg-card);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
  font-size: 1.1rem;
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

.carrier-sentence .carrier-word {
  color: var(--accent);
  font-weight: 700;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 1px;
}

/* ── Vector offset two-panel layout ───────────────────────── */
.vector-offset-panel { min-height: 540px; }

/* ── Offset per-family heatmap ────────────────────────────── */
.chart-heatmap-tall { min-height: 500px; }

/* ── Layerwise heatmap ────────────────────────────────────── */
.chart-layerwise-heatmap { min-height: 800px; }

/* ── Responsive additions ─────────────────────────────────── */
@media (max-width: 700px) {
  .improvement-display { flex-direction: column; align-items: flex-start; }
  .method-grid { grid-template-columns: 1fr; }
  .translation-grid { columns: 1; }
}