:root{--bg:#0a1020;--surface:#101933;--ink:#eef2ff;--muted:#a8b2d1;--accent:#43e8a6}*{box-sizing:border-box}html,body{min-height:100%;margin:0;padding:0}body{color:var(--ink);background:radial-gradient(1000px 500px at 10% -10%, #1f2f66, transparent), radial-gradient(900px 500px at 100% 0%, #133a44, transparent), var(--bg);font-family:Segoe UI,sans-serif}a{color:var(--accent)}main{max-width:920px;margin:0 auto;padding:2.5rem 1.25rem 4rem}.card{background:color-mix(in srgb, var(--surface) 88%, black);border:1px solid color-mix(in srgb, var(--muted) 25%, transparent);border-radius:16px;margin-top:1rem;padding:1rem 1.25rem}code{background:#0d1730;border-radius:6px;padding:.15rem .35rem}ul{line-height:1.7}