body {
            background: linear-gradient(135deg, #e0eafc 0%, #cfdef3 100%);
            min-height: 100vh;
            margin: 0;
            font-family: 'Segoe UI', Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        h1 {
            color: #2d3a4b;
            margin-bottom: 10px;
            letter-spacing: 1px;
            font-size: 2.2rem;
            text-align: center;
        }
        #price-info {
            color: #0077b6;
            font-weight: bold;
            font-size: 1.2rem;
            margin-bottom: 25px;
            text-align: center;
        }
        form#pay-form {
            background: #fff;
            padding: 32px 28px 24px 28px;
            border-radius: 16px;
            box-shadow: 0 8px 32px rgba(44, 62, 80, 0.13);
            display: flex;
            flex-direction: column;
            align-items: center;
            min-width: 320px;
        }
        form#pay-form input[type="text"],
        form#pay-form input[type="email"],
        form#pay-form select {
            width: 90%;
            padding: 10px 12px;
            margin: 10px 0;
            border: 1px solid #b0bec5;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.2s;
        }
        form#pay-form input:focus,
        form#pay-form select:focus {
            border: 1.5px solid #0077b6;
            outline: none;
        }
        form#pay-form button[type="submit"] {
            margin-top: 18px;
            padding: 12px 0;
            width: 100%;
            background: linear-gradient(90deg, #0077b6 0%, #00b4d8 100%);
            color: #fff;
            border: none;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(0,123,255,0.08);
            transition: background 0.2s, transform 0.1s;
        }
        form#pay-form button[type="submit"]:hover {
            background: linear-gradient(90deg, #00b4d8 0%, #0077b6 100%);
            transform: translateY(-2px) scale(1.03);
        }