.checkout-container{background:#fff;border-radius:12px;box-shadow:0 0 12px rgba(0,0,0,.1);margin:auto;padding:2rem}h2{border-bottom:1px solid #ddd;padding-bottom:.5rem}.form-group,h2{margin-bottom:1rem}label{display:block;margin-bottom:.3rem}input,select,textarea{border:1px solid #ccc;border-radius:6px;padding:.6rem;width:100%}.order-summary{background:#f1f1f1;border-radius:6px;margin-bottom:1.5rem;margin-top:1.5rem;padding:1rem}.btn{background-color:#007bff;border:none;border-radius:6px;color:#fff;cursor:pointer;display:inline-block;font-size:1rem;margin-top:1.5rem;padding:.75rem 1.5rem}.btn:hover{background-color:#0056b3}