:root{font:17px/1.65 system-ui,sans-serif;color:#182333;background:#f5f7fa}body{margin:0;padding:40px 20px}main{max-width:780px;margin:auto;padding:36px;background:#fff;border:1px solid #dce3ec;border-radius:12px}h1{font-size:clamp(1.7rem,5vw,2.3rem);line-height:1.2}h2{font-size:1.25rem;margin-top:1.6em}a{color:#164eaa;text-underline-offset:3px}code{overflow-wrap:anywhere;font-size:.9em}.label{font-size:.85rem;color:#506078}nav{display:flex;gap:16px;flex-wrap:wrap;margin-top:32px;border-top:1px solid #dce3ec;padding-top:20px}footer{margin-top:24px;font-size:.85rem;color:#506078}@media(max-width:500px){body{padding:12px}main{padding:22px}}