.payment-form {
    background-color: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    max-width: 600px;
    margin: 20px auto;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

    .payment-form .form-title {
        margin-bottom: 15px;
        font-size: 1.4rem;
        color: #333;
        border-bottom: 1px solid #eee;
        padding-bottom: 5px;
    }

    .payment-form .form-row {
        display: flex;
        flex-direction: column;
        margin-bottom: 12px;
    }

    .payment-form label {
        margin-bottom: 5px;
        font-size: 0.95rem;
        color: #555;
    }

    .payment-form .form-input {
        padding: 8px 12px;
        font-size: 1rem;
        border: 1px solid #ccc;
        border-radius: 8px;
    }

        .payment-form .form-input[readonly] {
            background-color: #f5f5f5;
            color: #555;
        }

    .payment-form .form-actions {
        display: flex;
        justify-content: flex-end;
        gap: 10px;
        margin-top: 15px;
    }

    .payment-form .btn-submit {
        background-color: #28a745;
        color: #fff;
        border: none;
        padding: 8px 16px;
        border-radius: 8px;
        cursor: pointer;
    }

        .payment-form .btn-submit:hover {
            background-color: #218838;
        }

    .payment-form .btn-cancel {
        background-color: #6c757d;
        color: #fff;
        border: none;
        padding: 8px 16px;
        border-radius: 8px;
        cursor: pointer;
    }

        .payment-form .btn-cancel:hover {
            background-color: #5a6268;
        }