body{margin:0;font-family:Arial,sans-serif;background:#f4f7f2;color:#222}header{background:#1b5e20;color:#fff;text-align:center;padding:50px 20px}.card{max-width:700px;margin:40px auto;background:#fff;padding:30px;border-radius:10px;text-align:center;box-shadow:0 2px 10px rgba(0,0,0,.1)}.btn{display:inline-block;background:#2e7d32;color:#fff;text-decoration:none;padding:15px 28px;border-radius:8px;font-weight:bold}.btn:hover{background:#1b5e20}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:20px;max-width:900px;margin:20px auto;padding:20px}.grid div{background:#fff;padding:20px;border-radius:8px;text-align:center;box-shadow:0 1px 6px rgba(0,0,0,.08)}footer{text-align:center;padding:20px;background:#163d18;color:#fff;margin-top:40px}