:root{color-scheme:dark;font-family:Arial,sans-serif;background:#0a0a0a;color:#f5f5f5}*{box-sizing:border-box}body{margin:0;background:#0a0a0a;color:#f5f5f5}a{color:inherit;text-decoration:none}main{max-width:1100px;margin:0 auto;padding:64px 24px}.card{border:1px solid #2a2a2a;border-radius:18px;padding:24px;background:#111}.grid{display:grid;grid-gap:18px;gap:18px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}.button{display:inline-block;padding:12px 18px;border-radius:12px;background:#f5f5f5;color:#111;font-weight:700}.muted{color:#a7a7a7}