/* SOMA mechanisms KB review site.
 * Design tokens follow the repo's data-viz reference palette: light/dark
 * surfaces, ink roles, and the fixed categorical slot order used for the
 * biological-organization levels on the key-event network.
 */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --hairline: #e1e0d9;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --good: #006300;
  --critical: #d03b3b;
  --warning-bg: #fdf3dc;
  --lvl-molecular: #2a78d6;
  --lvl-cellular: #eb6834;
  --lvl-tissue: #1baf7a;
  --lvl-organ: #eda100;
  --lvl-organism: #e87ba4;
  --lvl-population: #008300;
  --lvl-unspecified: #898781;
  --chip-bg: #f0efec;
  --code-bg: #f0efec;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --hairline: #2c2c2a;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --good: #0ca30c;
    --critical: #e66767;
    --warning-bg: #332b14;
    --lvl-molecular: #3987e5;
    --lvl-cellular: #d95926;
    --lvl-tissue: #199e70;
    --lvl-organ: #c98500;
    --lvl-organism: #d55181;
    /* population green and unspecified gray are mode-invariant by design in
       the reference palette (both clear 3:1 on the dark surface). */
    --lvl-population: #008300;
    --lvl-unspecified: #898781;
    --chip-bg: #272725;
    --code-bg: #272725;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.55;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; font-size: 0.86em; }

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--hairline);
  position: sticky; top: 0; z-index: 20;
}
.site-header .inner {
  max-width: 1100px; margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: baseline; gap: 20px; flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.05rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.site-nav { display: flex; gap: 16px; font-size: 0.92rem; }
.site-nav a { color: var(--ink-2); }
.site-nav a.active { color: var(--accent); font-weight: 600; }

main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 64px; }

.site-footer {
  border-top: 1px solid var(--hairline);
  color: var(--muted); font-size: 0.85rem;
}
.site-footer .inner { max-width: 1100px; margin: 0 auto; padding: 16px; }

h1 { font-size: 1.5rem; margin: 0 0 4px; }
h2 { font-size: 1.2rem; margin: 2.2em 0 0.6em; border-bottom: 1px solid var(--hairline); padding-bottom: 6px; }
h3 { font-size: 1.02rem; margin: 1.6em 0 0.5em; }
.subtitle { color: var(--ink-2); margin: 0 0 20px; max-width: 72ch; }

/* Stat tiles */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin: 20px 0 28px; }
.stat {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 16px;
}
.stat .label { font-size: 0.78rem; color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.04em; }
.stat .value { font-size: 1.9rem; font-weight: 700; line-height: 1.2; }

/* Search + filters */
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 18px; }
.toolbar input[type="search"] {
  flex: 1 1 260px; padding: 8px 12px; font: inherit;
  border: 1px solid var(--hairline); border-radius: 8px;
  background: var(--surface); color: var(--ink);
}
.toolbar .chip-btn {
  font: inherit; font-size: 0.85rem; cursor: pointer;
  border: 1px solid var(--hairline); border-radius: 999px;
  background: var(--surface); color: var(--ink-2); padding: 5px 12px;
}
.toolbar .chip-btn[aria-pressed="true"] {
  border-color: var(--accent); color: var(--accent); font-weight: 600;
}
.result-count { color: var(--muted); font-size: 0.85rem; margin-left: auto; }

/* Publication cards */
.pub-list { display: grid; gap: 14px; }
.pub-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 18px;
}
.pub-card h3 { margin: 0 0 2px; font-size: 1.02rem; }
.pub-meta { color: var(--muted); font-size: 0.84rem; margin-bottom: 8px; display: flex; gap: 12px; flex-wrap: wrap; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  background: var(--chip-bg); color: var(--ink-2);
  border-radius: 999px; padding: 2px 10px; font-size: 0.78rem; white-space: nowrap;
}
.chip .n { color: var(--muted); }

/* Detail page */
.pagehead { margin-bottom: 8px; }
.pagehead .links { display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.9rem; margin-top: 6px; }
.toc {
  font-size: 0.88rem; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 16px; margin: 16px 0 8px;
  display: flex; flex-wrap: wrap; gap: 4px 16px;
}
.toc a { color: var(--ink-2); }

.block {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 18px; margin: 12px 0;
}
.block > h3 { margin-top: 0; }
.block .entity-id { color: var(--muted); font-size: 0.8rem; float: right; margin-left: 12px; }
.desc { color: var(--ink-2); max-width: 85ch; }
.kv { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.kv .chip b { color: var(--ink); font-weight: 600; }

blockquote.snippet {
  margin: 10px 0 4px; padding: 8px 14px;
  border-left: 3px solid var(--accent);
  background: var(--chip-bg); border-radius: 0 8px 8px 0;
  font-style: italic; color: var(--ink);
}
.evidence-item { margin: 12px 0; }
.evidence-item .why { color: var(--ink-2); font-size: 0.9rem; margin: 2px 0 0; }
.badge {
  display: inline-block; border-radius: 4px; padding: 1px 7px;
  font-size: 0.74rem; font-weight: 600; letter-spacing: 0.03em;
  border: 1px solid var(--hairline); color: var(--ink-2); background: var(--surface);
}
.badge.support { color: var(--good); border-color: var(--good); }
.badge.refute { color: var(--critical); border-color: var(--critical); }

table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
.table-wrap { overflow-x: auto; }
th, td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--hairline); vertical-align: top; }
th { color: var(--ink-2); font-weight: 600; font-size: 0.8rem; }
td .sub { color: var(--muted); font-size: 0.82rem; }

/* Key-event level dots and legend */
.lvl-dot {
  display: inline-block; width: 10px; height: 10px; border-radius: 50%;
  margin-right: 6px; vertical-align: baseline;
}
.lvl-molecular-bg { background: var(--lvl-molecular); }
.lvl-cellular-bg { background: var(--lvl-cellular); }
.lvl-tissue-bg { background: var(--lvl-tissue); }
.lvl-organ-bg { background: var(--lvl-organ); }
.lvl-organism-bg { background: var(--lvl-organism); }
.lvl-population-bg { background: var(--lvl-population); }
.lvl-unspecified-bg { background: var(--lvl-unspecified); }

.network-wrap {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px; overflow-x: auto; margin: 14px 0;
}
.network-legend { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 0.82rem; color: var(--ink-2); padding: 6px 8px 2px; }
.network-legend .edge-sample { vertical-align: middle; margin-right: 6px; }
svg .ke-node rect { fill: var(--surface); stroke-width: 1.5; }
svg .ke-node text { fill: var(--ink); font-family: system-ui, -apple-system, "Segoe UI", sans-serif; }
svg .ke-node:hover rect { stroke-width: 3; }
svg .ker-edge { fill: none; stroke: var(--muted); }
svg .col-label { fill: var(--ink-2); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
svg .arrowhead { fill: var(--muted); }

.note {
  background: var(--warning-bg); border: 1px solid var(--hairline);
  border-radius: 8px; padding: 8px 14px; font-size: 0.88rem; color: var(--ink-2);
}

@media (max-width: 640px) {
  body { font-size: 14px; }
  .stat .value { font-size: 1.5rem; }
  .block, .pub-card { padding: 12px; }
}