.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    overflow: auto;
}

.modal-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {opacity: 0; transform: translateY(-20px);}
    to {opacity: 1; transform: translateY(0);}
}

#modal-card-element {
    padding: 16px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    background-color: #f8f9fa;
    margin: 20px 0;
    transition: border-color 0.3s;
}

#modal-card-element:focus-within {
    border-color: #6f4e37;
    box-shadow: 0 0 0 1px rgba(111, 78, 55, 0.2);
}

#modal-submit-payment {
    margin-top: 20px;
    width: 100%;
    padding: 12px;
    background-color: #3E5879;
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

#modal-submit-payment:hover {
    background-color: #2d3e50;
}

#modal-submit-payment:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#modal-card-errors {
    color: #e74c3c;
    margin-top: 10px;
    font-size: 14px;
    min-height: 20px;
}

/* Loading animation for the payment processing */
.processing-indicator {
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-right: 8px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}