:root{color-scheme:dark;--ink:#e5eef5;--muted:#a7bdca;--line:#2a4353;--accent:#62d5ff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;background:#08121b;color:var(--ink);font:16px/1.65 Inter,Arial,sans-serif}a{color:var(--accent);text-underline-offset:4px}a:hover{color:#fff}button,input,select{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}.site-navigation a{text-decoration:none}main{max-width:1180px;padding:0 28px;margin:auto}.resource-hero{padding:72px 0 36px;border-bottom:1px solid var(--line)}.eyebrow,.category{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}h1{font-size:clamp(38px,5vw,64px);line-height:1.08;letter-spacing:-.035em;max-width:1000px;margin:16px 0 24px}h2{font-size:28px;line-height:1.25;margin-top:40px}h3{line-height:1.3}.intro{max-width:820px;font-size:21px;color:var(--muted)}.reference-note{max-width:920px;padding:20px 0;color:var(--muted)}.reference-note strong{color:var(--ink)}.filters{padding:24px;background:#112431;border:1px solid var(--line);border-radius:12px;display:grid;grid-template-columns:2fr 1.4fr auto;gap:16px;align-items:end}.filters label{display:grid;gap:8px;font-size:14px}input,select,button,.button{background:#07141e;border:1px solid #486679;border-radius:6px;color:var(--ink);padding:11px 14px;min-height:46px;max-width:100%}button,.button{cursor:pointer}.button{display:inline-block;background:#123647;text-decoration:none}#term-count{grid-column:1/-1;margin:0;color:var(--muted)}.alphabet{display:flex;flex-wrap:wrap;gap:4px;padding:20px 0}.alphabet a{display:grid;place-items:center;width:36px;height:40px;text-decoration:none;border:1px solid var(--line);border-radius:5px}.term-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.term{padding:22px;border:1px solid var(--line);border-radius:10px;background:#0d1d29;scroll-margin-top:105px;overflow-wrap:anywhere}.term:target{border-color:var(--accent);box-shadow:0 0 0 2px #62d5ff44}.term-top{display:flex;justify-content:space-between;gap:12px}.term h2{font-size:22px;margin:10px 0}.term h2 small{font-size:15px;color:var(--muted)}.term p{margin:12px 0}.aliases,small{color:var(--muted)}details summary{cursor:pointer;color:var(--accent)}.term details{font-size:14px;border-top:1px solid var(--line);padding-top:12px}.term details small{display:block}.prose{max-width:850px;margin:40px auto}.prose p,.prose li,.prose dd{color:#c3d2dc}.prose li{padding-bottom:12px}.prose dt{font-weight:700;color:var(--ink);margin-top:20px}.prose dd{margin:6px 0 0}figure{margin:32px 0;padding:18px;border:1px solid var(--line);border-radius:12px;background:#102330;scroll-margin-top:105px}figure img{width:100%;height:auto;display:block;border-radius:6px}figcaption{font-size:14px;color:var(--muted);margin-top:14px}#schematics{max-width:900px;margin:64px auto}.related{padding:25px 0 60px;border-top:1px solid var(--line);margin-top:50px}.resource-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}.resource-links a{padding:18px;border:1px solid var(--line);border-radius:8px;text-decoration:none;background:#112431}footer{max-width:1180px;padding:30px 28px;margin:auto;border-top:1px solid var(--line);display:flex;gap:24px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.skip{position:absolute;top:-100px;left:15px;background:#fff;color:#000;padding:12px;z-index:100}.skip:focus{top:10px}@media(max-width:720px){main{padding:0 18px}.resource-hero{padding-top:40px}.term-grid,.filters{grid-template-columns:1fr}.intro{font-size:18px}.term{padding:18px}figure{padding:8px}.resource-links{grid-template-columns:1fr 1fr}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}.topic-shortcuts{display:flex;flex-wrap:wrap;gap:10px;margin:4px 0 24px}.topic-shortcuts button{background:#143447;color:#8ce0ff;font-size:14px}.topic-shortcuts button:hover{border-color:#62d5ff}.field-note{padding:12px 15px;border-left:3px solid #63d8ff;background:#132f40;font-size:14px}.field-note strong{display:block;color:#7adfff}.filters{scroll-margin-top:100px}.topic-count{display:inline-block;margin-left:6px;opacity:.8;font-variant-numeric:tabular-nums}#sources{scroll-margin-top:110px}.guide-section{margin:40px 0}.guide-section .resource-links{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.guide-description{display:block;margin-top:8px;color:var(--muted);font-size:14px;line-height:1.6}.conductivity-table{overflow-x:auto}.conductivity-table table{border-collapse:collapse;min-width:540px;width:100%}.conductivity-table th,.conductivity-table td{padding:10px;border:1px solid var(--line);text-align:left}.conductivity-table:focus-visible{outline:3px solid var(--accent)}