:root {
  --bg: #f4f1eb;
  --panel: #fffdf9;
  --panel-soft: #f8f5ee;
  --panel-subtle: #fbf8f2;
  --panel-strong: #f2ece1;
  --ink: #181512;
  --muted: #60574f;
  --accent: #14532d;
  --accent-soft: #ecf6ee;
  --accent-faint: rgba(20, 83, 45, 0.08);
  --line: rgba(24, 21, 18, 0.12);
  --line-strong: rgba(24, 21, 18, 0.2);
  --shadow: 0 10px 30px rgba(24, 21, 18, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #f7f4ee 0%, #f1ede6 100%);
  font-family: Georgia, "Times New Roman", serif;
}
a { color: inherit; }
.page-shell { max-width: 1240px; margin: 0 auto; padding: 20px 18px 40px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 0 22px; }
.brand-mark { display: inline-flex; flex-direction: column; gap: 3px; text-decoration: none; }
.brand-kicker { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--accent); }
.brand-title { font-size: 1rem; color: var(--muted); }
.top-nav { display: flex; flex-wrap: wrap; gap: 10px; }
.nav-link { text-decoration: none; padding: 10px 14px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.72); color: var(--muted); transition: border-color 120ms ease, color 120ms ease, background 120ms ease; }
.nav-link:hover, .nav-link:focus-visible { outline: none; border-color: var(--line-strong); color: var(--ink); }
.nav-link.active { background: var(--accent); color: white; border-color: var(--accent); }
.site-footer { margin-top: 24px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255, 255, 255, 0.72); display: grid; gap: 12px; }
.site-footer-copy { color: var(--muted); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-link { text-decoration: none; padding: 8px 12px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); background: rgba(244, 241, 235, 0.72); transition: border-color 120ms ease, color 120ms ease, background 120ms ease; }
.footer-link:hover, .footer-link:focus-visible { outline: none; border-color: var(--line-strong); color: var(--ink); }
.ad-slot { margin: 4px 0 2px; padding: 14px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255, 255, 255, 0.72); box-shadow: var(--shadow); }
.ad-slot-label { margin: 0 0 10px; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); }
.ad-slot-frame { min-height: 120px; border: 1px dashed rgba(24, 21, 18, 0.18); border-radius: 16px; background: linear-gradient(180deg, rgba(248, 245, 238, 0.9) 0%, rgba(255, 255, 255, 0.92) 100%); display: grid; place-items: center; padding: 18px; text-align: center; color: var(--muted); }
.ad-slot-frame .adsbygoogle { display: block; width: 100%; min-height: 120px; }
.ad-slot-copy { display: grid; gap: 6px; }
.ad-slot-copy strong { font-size: 1rem; color: var(--ink); }
.ad-slot-content-bottom, .ad-slot-interactive-bottom { margin-top: 18px; }
.inline-link { color: var(--accent); font-weight: 600; text-decoration: none; }
.inline-link:hover, .inline-link:focus-visible { text-decoration: underline; outline: none; }
.hero-block, .panel, .control-panel { background: var(--panel); border: 1px solid var(--line); box-shadow: var(--shadow); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.82fr); gap: 18px; }
.hero-block { border-radius: 24px; padding: 22px; margin-bottom: 22px; }
.hero-copy { max-width: 68ch; display: grid; gap: 12px; }
.theory-copy { max-width: 76ch; }
.theory-hero { margin-bottom: 30px; }
.lab-layout { display: grid; grid-template-columns: minmax(220px, 260px) minmax(0, 1fr) minmax(220px, 280px); gap: 16px; align-items: start; }
.explorer-lab-controls { position: sticky; top: 18px; }
.lab-visualization-card, .lab-context-card { border: 1px solid var(--line); border-radius: 20px; background: var(--panel-soft); padding: 16px; min-width: 0; }
.lab-card-header { display: flex; justify-content: space-between; gap: 10px; align-items: end; margin-bottom: 12px; }
.lab-card-copy { display: grid; gap: 6px; }
.lab-visual-tools { display: grid; gap: 10px; margin-bottom: 12px; }
.lab-view-switch { display: flex; flex-wrap: wrap; gap: 8px; }
.lab-view-button { border: 1px solid var(--line); background: rgba(255, 255, 255, 0.82); color: var(--muted); border-radius: 999px; padding: 8px 12px; cursor: pointer; }
.lab-view-button.active { background: var(--accent); border-color: var(--accent); color: white; }
.lab-view-button:hover, .lab-view-button:focus-visible { outline: none; border-color: var(--line-strong); color: var(--ink); }
.lab-view-button.active:hover, .lab-view-button.active:focus-visible { color: white; }
.lab-mode-note { color: var(--muted); font-size: 0.95rem; }
.lab-pagination { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, 0.72); }
.lab-pagination-status { color: var(--muted); font-size: 0.92rem; }
.lab-pagination-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.lab-page-button { border: 1px solid var(--line); background: white; color: var(--ink); border-radius: 999px; padding: 8px 12px; cursor: pointer; font: inherit; }
.lab-page-button:hover, .lab-page-button:focus-visible { outline: none; border-color: var(--line-strong); }
.lab-page-button:disabled { cursor: default; opacity: 0.45; }
.visualization-stage { min-height: 420px; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(248,245,238,0.96) 100%); padding: 12px; overflow: auto; }
.visualization-empty { padding: 18px; border-radius: 14px; background: rgba(24, 21, 18, 0.03); color: var(--muted); }
.visualization-svg { display: block; width: 100%; min-width: 520px; height: auto; }
.lab-visual-summary { display: grid; gap: 12px; margin-top: 14px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255, 255, 255, 0.72); }
.lab-visual-summary .definition-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.lab-visual-summary .definition-row { padding: 12px; border: 1px solid rgba(24, 21, 18, 0.08); border-radius: 14px; background: rgba(248, 245, 238, 0.9); grid-template-columns: 1fr; gap: 6px; }
.lab-visual-summary .definition-row:first-child { padding-top: 12px; }
.lab-visual-summary .definition-term { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.lab-visual-summary .definition-value { font-size: 1.9rem; line-height: 1; }
.viz-bridge { fill: rgba(217, 119, 6, 0.14); stroke: rgba(217, 119, 6, 0.18); stroke-width: 1; }
.viz-cell { stroke: rgba(24, 21, 18, 0.08); stroke-width: 1; transition: transform 120ms ease, stroke-width 120ms ease, stroke 120ms ease; }
.viz-cell.composite { fill: #ebe4d9; }
.viz-cell.unit { fill: #f2ede5; }
.viz-cell.factor-simple { fill: #e8dfd3; }
.viz-cell.factor-moderate { fill: #dcccb8; }
.viz-cell.factor-rich { fill: #cab08f; }
.viz-cell.factor-dense { fill: #b08f6d; }
.viz-cell.prime { fill: #5f8f72; }
.viz-cell.twin-prime { fill: #14532d; stroke: rgba(20, 83, 45, 0.3); }
.viz-cell.twin-center { fill: #d97706; stroke: rgba(180, 83, 9, 0.3); }
.visualization-svg.mode-mod6 .viz-cell.residue-0, .visualization-svg.mode-mod6 .viz-cell.residue-2, .visualization-svg.mode-mod6 .viz-cell.residue-3, .visualization-svg.mode-mod6 .viz-cell.residue-4 { opacity: 0.72; }
.visualization-svg.mode-mod6 .viz-cell.residue-1, .visualization-svg.mode-mod6 .viz-cell.residue-5 { opacity: 1; }
.visualization-svg.mode-centers .viz-cell-group { opacity: 0.12; }
.visualization-svg.mode-centers .viz-cell-group.kind-prime { opacity: 0.32; }
.visualization-svg.mode-centers .viz-cell-group.kind-twin-prime { opacity: 0.62; }
.visualization-svg.mode-centers .viz-cell-group.kind-twin-center { opacity: 1; }
.visualization-svg.mode-centers .viz-cell-group.kind-twin-center .viz-cell { stroke: rgba(180, 83, 9, 0.6); stroke-width: 2.8; filter: drop-shadow(0 0 0 rgba(255,255,255,0)) drop-shadow(0 2px 8px rgba(180, 83, 9, 0.24)); }
.visualization-svg.mode-centers .viz-cell-label { opacity: 0.12; }
.visualization-svg.mode-centers .viz-cell-group.kind-prime .viz-cell-label { opacity: 0.38; }
.visualization-svg.mode-centers .viz-cell-group.kind-twin-prime .viz-cell-label { opacity: 0.76; }
.visualization-svg.mode-centers .viz-cell-group.kind-twin-center .viz-cell-label { opacity: 1; font-size: 12px; }
.visualization-svg.mode-centers .viz-bridge { fill: transparent; stroke: rgba(180, 83, 9, 0.24); stroke-width: 1.4; }
.viz-cell-label { font-family: Georgia, "Times New Roman", serif; font-size: 11px; text-anchor: middle; dominant-baseline: middle; pointer-events: none; }
.viz-header-label { font-family: Georgia, "Times New Roman", serif; font-size: 11px; text-anchor: middle; fill: var(--muted); }
.viz-cell-label.light { fill: #fffdf9; }
.viz-cell-label.dark { fill: #3f372f; }
.viz-cell-group { cursor: pointer; }
.viz-cell-group:hover .viz-cell, .viz-cell-group:focus-visible .viz-cell { stroke: rgba(24, 21, 18, 0.35); stroke-width: 2; }
.viz-cell-group.selected .viz-cell { stroke: #181512; stroke-width: 3; }
.lab-hover-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.lab-inline-button { border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; background: transparent; color: var(--ink); font: inherit; cursor: pointer; }
.lab-inline-button:hover, .lab-inline-button:focus-visible { outline: none; border-color: var(--line-strong); background: rgba(24, 21, 18, 0.03); }
.lab-experiment-panel { margin: 0; padding: 14px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255, 255, 255, 0.68); display: grid; gap: 10px; }
.lab-experiment-panel legend { padding: 0 6px; font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.filter-label { display: block; margin-bottom: 8px; font-size: 0.85rem; color: var(--muted); }
.mod-residue-options { display: grid; grid-template-columns: repeat(4, minmax(42px, 42px)); gap: 8px; width: 100%; max-width: 192px; }
.mod-residue-options .section-copy { grid-column: 1 / -1; max-width: 24ch; }
.mod-residue-pill { position: relative; display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: white; color: var(--ink); cursor: pointer; transition: border-color 120ms ease, box-shadow 120ms ease, background 120ms ease, color 120ms ease; }
.mod-residue-pill:hover { border-color: var(--line-strong); }
.mod-residue-pill:focus-within { border-color: rgba(20, 83, 45, 0.35); box-shadow: 0 0 0 3px rgba(20, 83, 45, 0.12); }
.mod-residue-pill input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.mod-residue-pill span { font-size: 0.92rem; line-height: 1; }
.mod-residue-pill.active { background: var(--accent-soft); border-color: rgba(20, 83, 45, 0.24); color: var(--accent); font-weight: 600; }
.lab-experiment-summary { padding: 10px 12px; border: 1px solid rgba(20, 83, 45, 0.12); border-radius: 12px; background: rgba(236, 246, 238, 0.58); color: var(--muted); font-size: 0.92rem; }
.lab-experiment-summary.active { color: var(--ink); border-color: rgba(20, 83, 45, 0.18); background: rgba(236, 246, 238, 0.82); }
.experiments-layout { display: grid; gap: 18px; grid-template-columns: minmax(250px, 300px) minmax(0, 1fr); align-items: start; }
.experiment-setup-shell { gap: 12px; }
.experiment-setup-group { display: grid; gap: 10px; padding: 12px; border: 1px solid rgba(24, 21, 18, 0.08); border-radius: 14px; background: rgba(255, 255, 255, 0.5); }
.experiment-parameter-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(112px, 1fr)); gap: 10px; }
.experiment-parameter-grid label { display: grid; gap: 8px; align-content: start; padding: 10px 12px; border: 1px solid rgba(24, 21, 18, 0.08); border-radius: 12px; background: rgba(248, 245, 238, 0.86); min-width: 0; }
.experiment-parameter-grid label span { font-size: 0.82rem; color: var(--muted); }
.experiment-parameter-grid .is-hidden { display: none; }
.experiment-type-note { margin-top: -2px; }
.experiments-results { display: grid; gap: 14px; }
.experiment-verdict-card { display: grid; gap: 10px; }
.experiment-verdict-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.experiment-status-pill { display: inline-flex; align-items: center; padding: 6px 10px; border-radius: 999px; font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.experiment-status-pill.supported { background: rgba(20, 83, 45, 0.12); color: var(--accent); }
.experiment-status-pill.mixed { background: rgba(184, 115, 51, 0.14); color: var(--warn); }
.experiment-status-pill.inconclusive { background: rgba(184, 115, 51, 0.14); color: var(--warn); }
.experiment-status-pill.contradicted { background: rgba(153, 27, 27, 0.12); color: #9f1239; }
@media (max-width: 980px) { .experiments-layout { grid-template-columns: 1fr; } }
.lab-inline-button:disabled { opacity: 0.45; cursor: default; }
.visualization-svg.mod-filter-active .viz-cell-group.mod-muted { opacity: 0.22; }
.visualization-svg.mod-filter-active .viz-cell-group.mod-match .viz-cell { stroke: rgba(20, 83, 45, 0.42); stroke-width: 2.1; }
.visualization-svg.mod-filter-active.mode-centers .viz-cell-group.mod-muted { opacity: 0.08; }
.visualization-svg.mod-filter-active.mode-centers .viz-cell-group.kind-twin-center.mod-match { opacity: 1; }
.lab-hover-card { display: grid; gap: 12px; padding: 16px; border-radius: 16px; background: rgba(255, 255, 255, 0.78); border: 1px solid var(--line); margin-bottom: 14px; }
.lab-hover-header { display: grid; gap: 6px; }
.lab-hover-number { font-size: 2rem; line-height: 1; }
.lab-hover-kicker { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.76rem; color: var(--muted); }
.lab-hover-pair { display: inline-flex; align-items: center; gap: 6px; width: fit-content; padding: 6px 10px; border-radius: 999px; background: rgba(20, 83, 45, 0.08); color: var(--accent); border: 1px solid rgba(20, 83, 45, 0.12); font-size: 0.88rem; }
.explanation-card { display: grid; gap: 8px; padding: 12px 14px; border-radius: 16px; background: linear-gradient(180deg, rgba(236,246,238,0.68) 0%, rgba(255,255,255,0.82) 100%); border: 1px solid rgba(20, 83, 45, 0.12); }
.explanation-kicker { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.76rem; color: var(--accent); }
.explanation-card h3 { font-size: 0.98rem; }
.explanation-card p { color: var(--muted); }
.explanation-detail-grid { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.explanation-detail { padding: 10px 12px; border: 1px solid rgba(20, 83, 45, 0.12); border-radius: 12px; background: rgba(255, 255, 255, 0.76); }
.explanation-detail-label { display: block; margin-bottom: 4px; font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.explanation-detail-value { color: var(--ink); line-height: 1.55; }
.explanation-points { display: grid; gap: 6px; margin: 0; padding-left: 18px; color: var(--muted); }
.explanation-points li { line-height: 1.55; }
.explanation-links { display: flex; flex-wrap: wrap; gap: 10px; }
.analysis-intro-card { margin-bottom: 16px; }
.explorer-state-explanation { margin: 14px 0; }
.lab-fact-list { display: grid; gap: 10px; }
.lab-fact { display: grid; gap: 5px; padding-top: 10px; border-top: 1px solid rgba(24, 21, 18, 0.08); }
.lab-fact:first-child { border-top: 0; padding-top: 0; }
.lab-fact-label { font-size: 0.82rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.lab-fact-value { color: var(--ink); line-height: 1.5; word-break: break-word; }
.lab-divisor-box { max-height: 160px; overflow: auto; padding: 10px 12px; border-radius: 12px; background: rgba(24, 21, 18, 0.03); border: 1px solid rgba(24, 21, 18, 0.08); }
.lab-legend { display: grid; gap: 10px; margin-bottom: 14px; }
.lab-legend-item { display: flex; align-items: center; gap: 10px; color: var(--muted); }
.lab-swatch { width: 14px; height: 14px; border-radius: 999px; border: 1px solid rgba(24, 21, 18, 0.08); display: inline-block; }
.lab-swatch.composite { background: #ebe4d9; }
.lab-swatch.prime { background: #5f8f72; }
.lab-swatch.twin-prime { background: #14532d; }
.lab-swatch.twin-center { background: #d97706; }
.eyebrow { margin: 0 0 10px; text-transform: uppercase; letter-spacing: 0.16em; font-size: 0.76rem; color: var(--accent); }
h1, h2, h3, h4 { margin: 0; font-weight: 600; }
h1 { font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1.02; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.35rem, 2vw, 1.85rem); }
h3 { font-size: 1rem; }
p { margin: 0; line-height: 1.65; }
.hero-text, .panel-heading p, .metric-box p, .theory-intro, .theory-section p, .theory-approach p, #status-text, .filter-panel-header p, #table-filter-status, .stat-note, .section-copy { color: var(--muted); }
.control-panel { border-radius: 20px; padding: 20px; display: grid; align-content: start; gap: 14px; }
.control-panel label, .filter-control { display: grid; gap: 8px; font-size: 0.95rem; }
.control-panel input, .filter-control input, .filter-control select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 13px;
  font: inherit;
  background: white;
  color: var(--ink);
  transition: border-color 120ms ease, box-shadow 120ms ease, background 120ms ease;
}
.control-panel input:focus-visible,
.filter-control input:focus-visible,
.filter-control select:focus-visible {
  outline: none;
  border-color: rgba(20, 83, 45, 0.35);
  box-shadow: 0 0 0 3px rgba(20, 83, 45, 0.12);
}
.control-panel input:hover,
.filter-control input:hover,
.filter-control select:hover {
  border-color: var(--line-strong);
}
.control-panel button, .tab-button, .theory-tab { font: inherit; }
.control-panel button {
  border: none;
  border-radius: 999px;
  padding: 12px 18px;
  background: var(--accent);
  color: white;
  cursor: pointer;
}
.control-panel button:hover, .control-panel button:focus-visible { outline: none; background: #0f3f22; }
.content-stack { display: grid; gap: 20px; }
.panel { border-radius: 24px; padding: 22px; }
.panel-heading { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; align-items: end; margin-bottom: 16px; }
.summary-cards, .metric-grid, .analysis-stat-grid, .comparison-grid, .histogram-grid { display: grid; gap: 12px; }
.summary-cards { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.summary-card, .metric-box, .theory-section, .theory-approach, .analysis-card, .histogram-card, .table-card { border: 1px solid var(--line); border-radius: 18px; background: var(--panel-soft); }
.summary-card { padding: 16px; }
.summary-card .label, .stat-label { display: block; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.78rem; color: var(--muted); }
.summary-card .value, .stat-value { font-size: 1.7rem; }
.filter-panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel-subtle);
  padding: 18px;
  margin-bottom: 16px;
}
.filter-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
  margin-bottom: 16px;
}
.filter-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(280px, 1fr));
  gap: 14px;
  align-items: start;
}
.filter-column { display: grid; gap: 14px; align-content: start; }
.filter-group {
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  min-width: 0;
}
.filter-group legend {
  padding: 0 6px;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.filter-group-grid { display: grid; gap: 12px; }
.filter-group-grid-wide { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.filter-control span { font-size: 0.85rem; color: var(--muted); }
.checkbox-group { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; }
.checkbox-pill { display: flex; align-items: center; gap: 8px; min-height: 38px; padding: 8px 11px; border: 1px solid var(--line); border-radius: 10px; background: white; color: var(--ink); cursor: pointer; transition: border-color 120ms ease, box-shadow 120ms ease, background 120ms ease; }
.checkbox-pill:hover { border-color: var(--line-strong); }
.checkbox-pill:focus-within { border-color: rgba(20, 83, 45, 0.35); box-shadow: 0 0 0 3px rgba(20, 83, 45, 0.12); }
.checkbox-pill input { width: 14px; height: 14px; margin: 0; accent-color: var(--accent); }
.checkbox-pill span { color: var(--ink); font-size: 0.9rem; line-height: 1.3; }
.filter-range-row { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 10px; align-items: end; }
.filter-range-arrow { align-self: center; padding-bottom: 12px; color: var(--muted); font-size: 1rem; }
.filter-reset-button {
  align-self: start;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  padding: 10px 14px;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease;
}
.filter-reset-button:hover,
.filter-reset-button:focus-visible {
  outline: none;
  border-color: var(--line-strong);
  background: rgba(24, 21, 18, 0.03);
}
.column-panel {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.64);
}
.column-panel-header p { color: var(--muted); }
.column-toggle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.column-toggle-row .checkbox-pill {
  min-height: 34px;
  padding: 7px 10px;
}
.tab-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.tab-button { border: 1px solid var(--line); background: transparent; color: var(--muted); border-radius: 999px; padding: 10px 14px; cursor: pointer; }
.tab-button.active { background: var(--accent); border-color: var(--accent); color: white; }
.scroll-region { overflow: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; min-width: 680px; }
.data-table th, .data-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.data-table th { position: sticky; top: 0; background: #f5f1e8; z-index: 1; }
.data-table tr:nth-child(even) td { background: rgba(20, 83, 45, 0.03); }
.table-card, .code-card { padding: 0; overflow: hidden; }
.table-card-header, .histogram-header { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; align-items: end; padding: 16px 16px 0; }
.table-card .scroll-region { padding: 0 0 4px; }
.code-block { padding: 14px; border-radius: 16px; border: 1px solid var(--line); background: #fcfaf6; font-family: Consolas, "Courier New", monospace; white-space: pre-wrap; font-size: 0.9rem; }
.metric-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.metric-box, .analysis-card, .histogram-card { padding: 16px; }
.metric-box h3, .theory-section h3, .theory-approach h3, .analysis-card h3, .histogram-card h3 { margin-bottom: 8px; }
.analysis-layout, .section-stack { display: grid; gap: 16px; }
.analysis-stat-grid { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
.analysis-card { background: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(248,245,238,0.92) 100%); }
.analysis-card.accent-card { background: linear-gradient(180deg, rgba(236,246,238,0.95) 0%, rgba(248,245,238,0.95) 100%); border-color: rgba(20, 83, 45, 0.18); }
.stat-note { font-size: 0.92rem; }
.comparison-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.histogram-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.histogram-list { display: grid; gap: 10px; }
.histogram-row { display: grid; grid-template-columns: 72px minmax(0, 1fr) 58px; gap: 10px; align-items: center; }
.histogram-key, .histogram-value { font-variant-numeric: tabular-nums; color: var(--muted); }
.histogram-track { height: 10px; border-radius: 999px; background: rgba(24, 21, 18, 0.08); overflow: hidden; }
.histogram-fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, #14532d 0%, #2f7a4a 100%); }
.insight-strip { display: flex; flex-wrap: wrap; gap: 10px; }
.insight-pill { padding: 9px 12px; border-radius: 999px; background: var(--accent-faint); color: var(--accent); border: 1px solid rgba(20, 83, 45, 0.12); font-size: 0.92rem; }
.insight-pill-button { font: inherit; cursor: pointer; transition: border-color 120ms ease, background 120ms ease, color 120ms ease, transform 120ms ease; }
.insight-pill-button:hover, .insight-pill-button:focus-visible { outline: none; border-color: rgba(20, 83, 45, 0.28); background: rgba(20, 83, 45, 0.12); color: #0f3f22; transform: translateY(-1px); }
.definition-list { display: grid; gap: 10px; margin: 0; }
.definition-row { display: grid; grid-template-columns: minmax(110px, 160px) minmax(0, 1fr); gap: 12px; align-items: start; padding: 10px 0; border-top: 1px solid rgba(24, 21, 18, 0.08); }
.definition-row:first-child { border-top: 0; padding-top: 0; }
.definition-term { color: var(--muted); font-size: 0.92rem; }
.definition-value { font-variant-numeric: tabular-nums; }
.empty-note { padding: 14px 16px; border-radius: 16px; background: var(--panel-subtle); border: 1px dashed var(--line); color: var(--muted); }
.error { color: #8a1c1c; border: 1px solid rgba(138, 28, 28, 0.18); background: rgba(249, 115, 115, 0.08); padding: 14px; border-radius: 16px; }
.theory-layout { display: grid; grid-template-columns: minmax(250px, 300px) minmax(0, 1fr); gap: 22px; align-items: start; }
.theory-tabs-shell { align-self: start; }
.theory-tabs { display: grid; gap: 10px; }
.theory-tab { text-align: left; border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; background: transparent; color: var(--muted); cursor: pointer; }
.theory-tab:hover, .theory-tab:focus-visible { outline: none; border-color: var(--line-strong); color: var(--ink); }
.theory-tab.active { background: var(--accent-soft); border-color: rgba(20, 83, 45, 0.24); color: var(--ink); }
.theory-tab.active .theory-tab-label { color: var(--accent); }
.theory-tab-label { display: block; font-weight: 600; margin-bottom: 4px; }
.theory-tab-hint { display: block; font-size: 0.92rem; line-height: 1.45; }
.theory-content-shell { min-width: 0; }
.theory-tabpanel { display: grid; gap: 16px; outline: none; }
.theory-intro-block { display: grid; gap: 8px; padding-bottom: 4px; }
.theory-intro { max-width: 70ch; }
.theory-sections, .theory-approaches, .theory-timeline, .theory-faq-grid, .theory-reference-list, .theory-action-grid, .glossary-sections, .glossary-terms { display: grid; gap: 14px; }
.theory-section, .theory-approach, .theory-timeline-card, .theory-faq-card, .theory-reference-card, .theory-action-card, .glossary-section, .glossary-term-card { padding: 18px; }
.theory-approach dl { display: grid; gap: 8px; margin: 0; }
.theory-approach dt { font-weight: 600; }
.theory-approach dd { margin: 0; color: var(--muted); }
.theory-meta-strip { display: flex; flex-wrap: wrap; gap: 10px; }
.theory-meta-pill { padding: 8px 12px; border-radius: 999px; background: var(--accent-faint); color: var(--accent); border: 1px solid rgba(20, 83, 45, 0.12); font-size: 0.9rem; }
.theory-block { display: grid; gap: 12px; margin-bottom: 10px; }
.theory-block h3 { font-size: 1.02rem; }
.theory-timeline-card { border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(248,245,238,0.92) 100%); }
.theory-timeline-label { display: inline-block; margin-bottom: 8px; font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.theory-faq-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.theory-faq-card h4, .theory-reference-card h4 { margin: 0 0 8px; font-size: 0.98rem; }
.theory-reference-note, .theory-faq-card p, .theory-timeline-card p, .theory-action-card p { color: var(--muted); }
.theory-action-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.theory-action-card { border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,0.82); display: grid; gap: 10px; }
.theory-path-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.theory-path-card { border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,0.72); }
.theory-action-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; }
.theory-action-kicker { display: inline-block; font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.theory-destination-badge { display: inline-flex; align-items: center; min-height: 28px; padding: 4px 10px; border-radius: 999px; border: 1px solid rgba(20, 83, 45, 0.12); background: var(--accent-faint); color: var(--accent); font-size: 0.82rem; font-weight: 600; }
.theory-action-card h4 { margin: 0 0 8px; font-size: 1rem; }
.theory-action-card .inline-link { font-weight: 600; }
.theory-reference-list { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.glossary-sections { gap: 18px; }
.glossary-section { border: 1px solid var(--line); border-radius: 18px; background: var(--panel-soft); }
.glossary-section-header { display: grid; gap: 8px; margin-bottom: 14px; }
.glossary-terms { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.glossary-term-card { border: 1px solid rgba(24, 21, 18, 0.08); border-radius: 16px; background: rgba(255,255,255,0.72); }
.glossary-term-card h3 { margin-bottom: 8px; }
.glossary-inline-link { color: var(--accent); font-weight: 600; text-decoration: none; }
.glossary-inline-link:hover, .glossary-inline-link:focus-visible { text-decoration: underline; outline: none; }
.glossary-jump-shell { display: grid; gap: 10px; margin-top: 12px; padding: 12px 14px; border: 1px solid rgba(24, 21, 18, 0.08); border-radius: 16px; background: rgba(255,255,255,0.5); }
.glossary-strip-header { display: grid; gap: 4px; }
.glossary-strip-label { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.glossary-strip-copy { color: var(--muted); font-size: 0.94rem; line-height: 1.5; }
.glossary-jump-strip { display: flex; flex-wrap: wrap; gap: 10px; }
.glossary-toolbar { display: grid; gap: 14px; margin-bottom: 18px; }
.glossary-search-control { display: grid; gap: 8px; max-width: 420px; }
.glossary-search-control span { color: var(--muted); font-size: 0.9rem; }
.glossary-search-control input { width: 100%; min-height: 46px; border: 1px solid var(--line); border-radius: 12px; padding: 11px 13px; font: inherit; background: white; color: var(--ink); }
.glossary-search-control input:focus-visible { outline: none; border-color: rgba(20, 83, 45, 0.35); box-shadow: 0 0 0 3px rgba(20, 83, 45, 0.12); }
.glossary-term-card.is-hidden, .glossary-section.is-hidden { display: none; }
.glossary-term-summary { color: var(--ink); font-weight: 600; line-height: 1.55; margin-bottom: 8px; }
.glossary-term-detail { color: var(--muted); }
.glossary-term-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
@media (max-width: 1024px) {
  .filter-layout { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-group-grid-wide { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .site-header, .hero-grid, .theory-layout, .lab-layout { grid-template-columns: 1fr; display: grid; }
  .explorer-lab-controls { position: static; }
  .site-header { gap: 14px; }
  .top-nav { justify-content: flex-start; }
  .definition-row { grid-template-columns: 1fr; gap: 4px; }
}
@media (max-width: 700px) {
  .filter-layout { grid-template-columns: 1fr; }
  .filter-column { gap: 12px; }
  .filter-panel-header { flex-direction: column; align-items: stretch; }
  .column-toggle-row { display: grid; grid-template-columns: 1fr; }
  .filter-range-row { grid-template-columns: 1fr; }
  .filter-range-arrow { display: none; }
  .histogram-row { grid-template-columns: 60px minmax(0, 1fr) 42px; }
}
@media (max-width: 640px) {
  .page-shell { padding: 14px 12px 30px; }
  .hero-block, .panel, .control-panel { padding: 18px; }
  h1 { line-height: 1.06; }
  .top-nav { gap: 8px; }
  .nav-link, .tab-button, .theory-tab, .filter-reset-button { width: 100%; justify-content: flex-start; }
}