:root{color-scheme:light;--ink:#142231;--muted:#526270;--accent:#066c65;--line:#dce5e8}*{box-sizing:border-box}body{margin:0;background:#f8fbfb;color:var(--ink);font:17px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}header,main,footer{max-width:820px;margin:auto;padding:24px}header{display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--line)}header img{width:52px;height:52px;border-radius:12px}header strong{display:block;font-size:21px}header span{color:var(--muted);font-size:14px}nav{margin-left:auto;display:flex;gap:18px}a{color:var(--accent);text-underline-offset:3px}nav a{font-size:15px}h1{font-size:clamp(30px,5vw,42px);line-height:1.2;margin:24px 0 12px;letter-spacing:-.035em}h2{font-size:22px;line-height:1.3;margin:32px 0 10px}p,ul,ol{margin:12px 0}li{margin:7px 0}.meta{color:var(--muted);font-size:14px}.intro{font-size:20px}.note{border-left:3px solid #80d8d0;padding:10px 18px;background:#edf6f5}footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px;margin-top:32px}@media(max-width:540px){header,main,footer{padding:20px}header{flex-wrap:wrap}nav{margin-left:66px}body{font-size:16px}}