:root{color-scheme:dark}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,sans-serif;background:#0d1117;color:#e6edf3}.container{max-width:980px;margin:0 auto;padding:24px}.card{border:1px solid #30363d;border-radius:8px;padding:16px;margin-bottom:12px;background:#161b22}.muted{color:#8b949e}