:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#172b35;background:#f4f7f8;line-height:1.65}
*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:850px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}header>a{font-weight:700}nav{display:flex;gap:20px;flex-wrap:wrap}main{background:#fff;border:1px solid #dce4e8;border-radius:12px}h1{font-size:clamp(1.8rem,5vw,2.4rem);line-height:1.2;margin-top:8px}h2{font-size:1.25rem;margin-top:30px}a{color:#075e79;text-underline-offset:3px}a:focus-visible{outline:3px solid #075e79;outline-offset:4px}code{overflow-wrap:anywhere;font-size:.9em}li+li{margin-top:14px}footer{font-size:.9rem;color:#465964}@media(max-width:600px){header,main,footer{padding:20px}main{border-radius:0}nav{gap:16px}}