:root{color-scheme:light dark;--bg:#0b1118;--panel:#121e2a;--fg:#ecf3f8;--muted:#a5b7c6;--line:#2a3d4c;--accent:#7ee4cc}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 system-ui,sans-serif}body.light{color-scheme:light;--bg:#f6f8f9;--panel:#fff;--fg:#132b3b;--muted:#435d6c;--line:#c8d7df;--accent:#076955}a{color:inherit;text-underline-offset:5px}button,.button{font:inherit;border:1px solid var(--line);border-radius:9px;padding:11px 20px;background:var(--panel);color:var(--fg);cursor:pointer;text-decoration:none;display:inline-block}.primary{background:var(--accent);color:var(--bg);border:0;font-weight:700}button:hover,.button:hover{filter:brightness(1.15)}:focus-visible{outline:3px solid var(--accent);outline-offset:5px}header{max-width:1280px;margin:auto;padding:25px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;letter-spacing:.1em;font-weight:800;text-decoration:none}.badge,.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--accent)}nav{display:flex;gap:24px;font-size:14px}main{max-width:1200px;margin:auto;padding:70px 32px;min-height:70vh}h1{font-size:clamp(38px,6vw,76px);line-height:1.05;letter-spacing:-.045em;margin:20px 0 28px;max-width:850px}h2{font-size:30px;line-height:1.2}p{max-width:760px;color:var(--muted)}.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:60px;align-items:center}.actions{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0}.diagram{border:1px solid var(--line);border-radius:20px;padding:35px;background:var(--panel)}.node{padding:15px;border:1px solid var(--line);border-radius:9px;margin:12px 0}.wire{color:var(--accent);font:14px ui-monospace,monospace;padding-left:20px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:22px;margin:36px 0}.card{padding:25px;background:var(--panel);border:1px solid var(--line);border-radius:12px}.card h2{font-size:23px}.number{font:14px monospace;color:var(--accent)}section{margin:48px 0}footer{border-top:1px solid var(--line);padding:40px max(32px,calc((100vw - 1136px)/2));font-size:14px}footer div{display:flex;gap:24px;flex-wrap:wrap;margin:22px 0}small{color:var(--muted)}.notice{border-left:3px solid var(--accent);padding:12px 20px;background:var(--panel)}.skip{position:absolute;top:-100px}.skip:focus{top:5px;background:var(--panel);padding:10px;z-index:3}.tabs{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0}ul{padding-left:24px}details{border-bottom:1px solid var(--line);padding:20px 0}summary{cursor:pointer;font-weight:650}.error{color:#ffb5a8}input{font:inherit;padding:12px;background:var(--panel);color:var(--fg);border:1px solid var(--line)}@media(max-width:850px){header{flex-wrap:wrap}nav{order:3;flex-wrap:wrap;width:100%;gap:16px}.hero{grid-template-columns:1fr;gap:20px}main{padding-top:40px}.diagram{padding:20px}}@media(prefers-reduced-motion:no-preference){a,button{transition:filter .15s}}