:root{color-scheme:dark;--bg:#0b1220;--card:#151d2e;--text:#eef3ff;--muted:#9aa8c3;--accent:#3ee0a2}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;background:radial-gradient(circle at top,#16324d,var(--bg) 45%);color:var(--text)}main{max-width:880px;margin:0 auto;padding:48px 20px 80px}h1{margin:0 0 8px;font-size:40px}li,p{color:var(--muted);line-height:1.6}.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:20px;padding:20px 22px;margin-top:20px}code{color:var(--accent)}