:root{--bg:#f4f2ea;--card:#fff8e9;--text:#1f2a25;--accent:#005f73}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:radial-gradient(circle at top right,#cde5d7 0,var(--bg) 45%);color:var(--text)}main{min-height:100vh;display:grid;place-items:center}.card,main{padding:2rem}.card{width:min(820px,100%);background:var(--card);border:1px solid #d8d2bf;border-radius:16px;box-shadow:0 14px 40px rgba(8,40,32,.12)}h1{margin:0 0 .6rem}small{opacity:.8}ul{margin-top:1rem}code{background:#ebf4ef;padding:.1rem .4rem;border-radius:6px}