:root{color-scheme:light dark;--paper:#f5f5fa;--ink:#201b30;--muted:#656073;--accent:#7050ba;--rule:#dbd8e7;--surface:#fff}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.8 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}header,main,footer{max-width:800px;margin:auto;padding:28px}header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--rule);gap:20px}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink);font-size:23px;font-weight:700}.brand img{width:46px;height:46px;border-radius:12px}nav{display:flex;gap:20px;font-size:14px}a{color:var(--accent);text-underline-offset:4px}h1{font-size:clamp(32px,6vw,48px);line-height:1.2;letter-spacing:-1px;margin:38px 0 20px}h2{font-size:24px;line-height:1.4;margin:44px 0 12px}p,ul,ol{margin:12px 0}li{padding:4px 0}.intro{font-size:21px;line-height:1.7;color:var(--muted)}.meta,footer{color:var(--muted);font-size:14px}footer{border-top:1px solid var(--rule);margin-top:50px}strong{font-weight:650}a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}@media(prefers-color-scheme:dark){:root{--paper:#181923;--ink:#f5f4fc;--muted:#aaa7bc;--accent:#b7a0ff;--rule:#34313f;--surface:#242331}}@media(max-width:520px){header{align-items:flex-start;flex-direction:column;gap:12px}header,main,footer{padding:22px}nav{gap:24px}h1{margin-top:25px}}