body {
    background-color: #f8f9fa;
}

.card {
    max-width: 600px;
    margin: 50px auto;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.error-message {
    color: #dc3545;
    font-size: 0.9rem;
}

.btn-gpay {
    background-color: #000;
    color: #fff;
    transition: all 0.3s ease;
}

.btn-gpay:hover {
    background-color: #1a73e8;
    color: #fff;
    transform: scale(1.05);
}

.modal-body input {
    border-radius: 8px;
    padding: 10px;
    border: 1px solid #ced4da;
}

.form-label {
    font-size: 14px;
}

.form-control {
    font-size: 14px;
}