.modal {
        display: none;
        position: fixed;
        z-index: 1000;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
    }

    .modal-content {
        background-color: #fff;
        margin: 10% auto;
        padding: 20px;
        border-radius: 10px;
        width: 90%;
        max-width: 500px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    }

    .success-modal {
        text-align: center;
        padding: 40px 20px;
    }

    .modal-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 20px;
        padding-bottom: 15px;
        border-bottom: 1px solid #eee;
    }

    .modal-header h2 {
        margin: 0;
        color: #333;
        font-size: 1.5rem;
    }

    .close-modal {
        font-size: 28px;
        cursor: pointer;
        color: #666;
    }

    .close-modal:hover {
        color: #333;
    }

    .form-group {
        margin-bottom: 20px;
    }

    .form-group label {
        display: block;
        margin-bottom: 8px;
        font-weight: 500;
        color: #555;
    }

    .form-control {
        width: 100%;
        padding: 10px;
        border: 1px solid #ddd;
        border-radius: 5px;
        font-size: 1rem;
    }

    .form-control:focus {
        outline: none;
        border-color: #4a90e2;
        box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
    }

    .price-display {
        padding: 10px;
        background-color: #f8f9fa;
        border-radius: 5px;
        font-size: 1.2rem;
        font-weight: bold;
        color: #28a745;
    }

    .modal-footer {
        display: flex;
        justify-content: flex-end;
        gap: 10px;
        margin-top: 30px;
        padding-top: 20px;
        border-top: 1px solid #eee;
    }

    .btn {
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        font-size: 1rem;
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .btn-secondary {
        background-color: #6c757d;
        color: white;
    }

    .btn-secondary:hover {
        background-color: #5a6268;
    }

    .btn-primary {
         color: white;
    }

    .btn-primary:hover {
        background-color: #2a6e36;
    }

    .btn-success {
        background-color: #28a745;
        color: white;
        padding: 10px 30px;
        margin-top: 20px;
    }

    .btn-success:hover {
        background-color: #218838;
    }

    .success-icon {
        font-size: 60px;
        color: #28a745;
        margin-bottom: 20px;
    }

    .success-icon i {
        animation: scaleIn 0.5s ease;
    }

    @keyframes scaleIn {
        from {
            transform: scale(0);
        }
        to {
            transform: scale(1);
        }
    }

    /* Responsive adjustments */
    @media (max-width: 600px) {
        .modal-content {
            margin: 20% auto;
            width: 95%;
        }
        
        .modal-footer {
            flex-direction: column;
        }
        
        .btn {
            width: 100%;
            margin-bottom: 10px;
        }
    }
        .btn-register:disabled {
    background: #ccc;
    cursor: not-allowed;
}