:root{color-scheme:light dark;--bg:#f6f7fa;--paper:#fff;--ink:#182332;--muted:#526174;--line:#dce3ec;--accent:#2257ba}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}main,header,footer{max-width:860px;margin:auto;padding:28px 24px}header{display:flex;gap:20px;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);flex-wrap:wrap}nav{display:flex;gap:20px;flex-wrap:wrap}a{color:var(--accent);text-underline-offset:4px;overflow-wrap:anywhere}.brand{font-weight:750;color:var(--ink);text-decoration:none}h1{font-size:clamp(32px,6vw,48px);line-height:1.2;letter-spacing:-.035em}h2{font-size:24px;line-height:1.35;margin-top:32px}h3{font-size:19px}p,li{max-width:70ch}.lead{font-size:21px;color:var(--muted)}.card{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:24px;margin:24px 0}.icon{width:92px;height:92px;border-radius:22px}.tag{font-size:14px;color:var(--muted)}footer{font-size:14px;color:var(--muted);border-top:1px solid var(--line)}:focus-visible{outline:3px solid var(--accent);outline-offset:4px}details{border-top:1px solid var(--line);padding:16px 0}summary{font-weight:600;cursor:pointer}code{font-size:.92em;background:var(--bg);padding:2px 6px;border-radius:5px}@media(prefers-color-scheme:dark){:root{--bg:#101720;--paper:#192331;--ink:#edf3fa;--muted:#b2c1d4;--line:#344255;--accent:#9ebfff}}@media(max-width:480px){main,header,footer{padding:22px 18px}.card{padding:18px}}