:root{color-scheme:light;--blue:#194b8f;--ink:#182431;--muted:#465565}*{box-sizing:border-box}body{margin:0;background:#f5f7fa;color:var(--ink);font:17px/1.65 system-ui,-apple-system,sans-serif}main{max-width:780px;margin:0 auto;padding:54px 24px 36px}a{color:var(--blue);text-underline-offset:4px}a:focus-visible{outline:3px solid var(--blue);outline-offset:5px}.brand{font-size:22px;font-weight:750;text-decoration:none}h1{font-size:clamp(32px,6vw,48px);line-height:1.15;letter-spacing:-.035em;margin:30px 0 18px}h2{font-size:22px;line-height:1.3;margin:0 0 12px}.intro{font-size:21px;color:var(--muted)}section{margin:22px 0;padding:26px;background:#fff;border:1px solid #dbe2eb;border-radius:18px}p{margin:12px 0}footer{padding:22px 0;color:var(--muted);font-size:15px}@media(max-width:420px){main{padding:30px 18px}section{padding:20px}}