body{font-family:Arial,sans-serif;background:#0f172a;color:#fff;margin:0}header{padding:20px;text-align:center}#grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;padding:20px}.card{background:#1e293b;padding:20px;border-radius:16px;text-decoration:none;color:#fff}