:root{color-scheme:light dark;--bg:#faf8f2;--ink:#173d32;--muted:#52665d;--line:#d7dfd7;--accent:#b54d39}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}header,main,footer{max-width:760px;margin:auto;padding:28px 24px}header{display:flex;justify-content:space-between;align-items:center;gap:24px;border-bottom:1px solid var(--line)}nav{display:flex;gap:20px;flex-wrap:wrap}.brand{font-size:24px;font-weight:750;text-decoration:none}h1{font-size:clamp(36px,7vw,54px);line-height:1.1;letter-spacing:-.04em;margin:20px 0}h2{font-size:23px;line-height:1.3;margin-top:36px}p,ul,ol{margin:16px 0}a{color:var(--accent);text-underline-offset:4px}a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}.intro{font-size:21px}.muted,footer{color:var(--muted)}footer{border-top:1px solid var(--line);font-size:14px;padding-bottom:48px}.notice{border-left:3px solid var(--accent);padding-left:18px}li{margin:8px 0}@media(prefers-color-scheme:dark){:root{--bg:#101f1a;--ink:#edf3eb;--muted:#b2c4b9;--line:#344b3f;--accent:#f4a591}}@media(max-width:420px){header{align-items:flex-start;flex-direction:column;gap:10px}}