:root{--bg:#0b0b0b;--fg:#f5f5f5;--muted:#9aa0a6;--card:#111214;--border:#222428}*{box-sizing:border-box}body,html{padding:0;margin:0;background:var(--bg);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,Apple Color Emoji,Segoe UI Emoji}.card{background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:0 10px 30px rgba(0,0,0,.25);padding:28px}