:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#080808;color:#f4f4f4}*{box-sizing:border-box}body{margin:0;background:#080808;color:#f4f4f4}a{color:#ddd;text-underline-offset:3px}a:hover{color:#fff}.wrap{width:min(860px,calc(100% - 32px));margin:0 auto;padding:40px 0 72px}header{margin-bottom:36px}.brand{font-weight:800;text-decoration:none}.eyebrow{color:#999;text-transform:uppercase;letter-spacing:.1em;font-size:.75rem;font-weight:700}h1{font-size:clamp(2rem,6vw,3.6rem);letter-spacing:-.04em;line-height:1.02;margin:.3em 0}h2{margin-top:2.2rem}p,li{line-height:1.7;color:#c4c4c4}code,.equation{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.equation{display:block;border:1px solid #2a2a2a;background:#111;padding:16px;border-radius:10px;color:#eee;overflow:auto}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;padding:0;list-style:none}.card{display:block;height:100%;border:1px solid #292929;border-radius:12px;padding:16px;background:#101010;text-decoration:none}.card strong{display:block;margin-bottom:6px}.card span{color:#aaa;font-size:.9rem;line-height:1.5}.note{border-left:2px solid #666;padding-left:14px}nav{display:flex;gap:16px;flex-wrap:wrap;margin-top:28px;padding-top:20px;border-top:1px solid #222}@media(max-width:600px){.wrap{padding-top:24px}}