:root{font:16px system-ui,-apple-system,Segoe UI,sans-serif;color-scheme:light}body{margin:0;background:#f4f7fb;color:#14263b}main{max-width:830px;margin:2rem auto;background:white;padding:2rem;border-radius:18px;box-shadow:0 4px 24px #15253b12}h1{font-size:1.6rem}ol{line-height:1.8}li{margin:1rem 0}button{font:inherit;border:0;border-radius:8px;background:#17649d;color:white;padding:.7rem .9rem;cursor:pointer}button:focus-visible{outline:3px solid #ffb700}button:disabled{opacity:.5;cursor:not-allowed}code,pre{overflow-wrap:anywhere}pre{min-height:160px;white-space:pre-wrap;background:#071f31;color:#e5f3fc;padding:1rem;border-radius:10px}.notice{border-left:4px solid #17649d;padding:.7rem 1rem;background:#edf6ff}@media(max-width:700px){main{margin:0;border-radius:0;padding:1rem}}