.cat-filter{display:grid;grid-gap:12px;gap:12px;padding:16px;border:1px solid var(--line);background:var(--bg-2);border-radius:var(--r);margin-bottom:20px}.cat-filter-row{display:flex;gap:8px 14px;align-items:center;flex-wrap:wrap}.cat-filter-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);min-width:88px}.cat-chips{display:flex;flex-wrap:wrap;gap:6px}.cat-chip{height:30px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:var(--bg);color:var(--ink-2);font-size:13px;font-weight:600;display:inline-flex;align-items:center;gap:6px;cursor:pointer;transition:border-color var(--dur-fast),color var(--dur-fast),background var(--dur-fast)}.cat-chip:hover{border-color:var(--line-2);color:var(--ink)}.cat-chip[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}.cat-chip .n{font-family:var(--font-mono);font-size:11px;opacity:.7}.cat-results{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}a.cat-card{display:flex;flex-direction:column;gap:10px;color:inherit;text-decoration:none;min-height:100%}.cat-card .cat-name{font-weight:700;font-size:15.5px;line-height:1.35;margin:0}.cat-card .cat-explain{font-size:13px;color:var(--ink-2);line-height:1.55;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin:0}.cat-card .cat-foot{margin-top:auto;display:flex;flex-wrap:wrap;gap:6px;padding-top:4px}.cat-spec{display:grid;grid-template-columns:max-content minmax(0,1fr);grid-gap:8px 16px;gap:8px 16px;font-size:13.5px;margin:0}.cat-spec dt{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);padding-top:3px}.cat-spec dd{margin:0;overflow-wrap:anywhere}.cat-why{border:1px solid var(--copper);background:var(--copper-dim);border-radius:var(--r);padding:22px 24px}.cat-why p{font-size:16px;line-height:1.7;margin:8px 0 0;max-width:72ch;color:var(--ink)}.cat-why .cat-why-hint{font-size:12.5px;color:var(--ink-3);margin-top:12px;max-width:72ch}.cat-ref{margin-top:18px;border-top:1px solid var(--copper);padding-top:14px;display:grid;grid-gap:0;gap:0}.cat-ref-row{display:grid;grid-template-columns:200px minmax(0,1fr);grid-gap:6px 18px;gap:6px 18px;padding:12px 0;border-bottom:1px solid var(--line)}.cat-ref-row:last-child{border-bottom:0}.cat-ref-row .op{font-weight:700;font-size:14px}.cat-ref-row .net{font-family:var(--font-mono);font-size:12px;color:var(--ink-3);margin-top:4px;overflow-wrap:anywhere}.cat-ref-row .why{font-size:14px;line-height:1.65;margin:0;color:var(--ink)}.cat-ref-row .meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;align-items:center}@media (max-width:720px){.cat-ref-row{grid-template-columns:1fr;gap:4px}}.ex-workbench{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr)}@media (max-width:1000px){.ex-workbench{grid-template-columns:1fr}}.ex-meta{display:flex;gap:6px 14px;flex-wrap:wrap;font-size:12px;color:var(--ink-3);font-family:var(--font-mono);letter-spacing:.02em}.ex-actions{gap:8px;flex-wrap:wrap;padding-top:6px}.ex-source{position:relative}.ex-source noscript pre{max-height:480px}.ex-bus{display:flex;gap:8px 12px;flex-wrap:wrap;align-items:center;font-size:13px;padding:8px 0;border-bottom:1px solid var(--line)}.ex-bus:last-child{border-bottom:0}.ex-part-row{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-gap:8px 12px;gap:8px 12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}.ex-part-row:last-child{border-bottom:0}.ex-part-row .ev{font-family:var(--font-mono);font-size:11.5px;color:var(--ink-3);overflow-wrap:anywhere}@media (max-width:640px){.cat-filter-label{min-width:0;width:100%}.cat-why{padding:18px}}.ex-workbench>*{min-width:0}.rung-nav{position:-webkit-sticky;position:sticky;top:var(--nav-h);z-index:5;display:flex;gap:6px;flex-wrap:wrap;padding:10px 0;margin:0 0 8px;background:var(--bg);border-bottom:1px solid var(--line)}.rung-nav a{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 11px;border:1px solid var(--line);border-radius:999px;background:var(--bg-2);font-size:13px;font-weight:600;color:var(--ink);text-decoration:none}.rung-nav a:hover{border-color:var(--line-2)}.rung-nav .rung-count{font-family:var(--font-mono);font-size:11px;color:var(--ink-3);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.rung-section{padding:28px 0 8px;scroll-margin-top:calc(var(--nav-h) + 56px)}.rung-section:first-of-type{padding-top:16px}.rung-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.rung-head .eyebrow{margin:0}.rung-fold>summary{list-style:none;cursor:pointer;padding:11px 14px;border:1px dashed var(--line-2);border-radius:var(--r-sm);background:var(--bg-2)}.rung-fold>summary::-webkit-details-marker{display:none}.rung-fold>summary:after{content:" \25be"}.rung-fold[open]>summary{margin-bottom:14px}.rung-fold[open]>summary:after{content:" \25b4"}.rung-fold>summary:focus-visible{outline:2px solid var(--copper);outline-offset:2px}.ex-card{flex-direction:column}.ex-actions,.ex-card{display:flex;gap:10px}.ex-actions{align-items:center;justify-content:space-between;margin-top:auto}.ex-detail-link{color:var(--ink-2);font-weight:600}.ex-detail-link:hover{color:var(--copper-ink)}