/* Gradient Background for Checkout Header */
    .gradient-header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 40px 0;
        margin-bottom: 30px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    }
    
    .gradient-header h1 {
        font-size: 2.5rem;
        font-weight: 700;
        text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
        letter-spacing: 1px;
        color: #ffff;
    }
    
    /* Modern Card Styles */
    .checkout-card {
        border-radius: 10px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        overflow: hidden;
        margin-bottom: 30px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    
    .checkout-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 25px rgba(0,0,0,0.12);
    }
    
    .order-section {
        background: #f8f9fa;
        padding: 30px;
    }
    
    .summary-section {
        background: white;
        padding: 30px;
    }
    
    /* Form Elements */
    .form-control {
        border-radius: 5px;
        padding: 12px 15px;
        border: 1px solid #e0e0e0;
        transition: all 0.3s;
    }
    
    .form-control:focus {
        border-color: #667eea;
        box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    }
    
    /* Section Headers */
    .section-header {
        background: #2c3e50;
        color: white;
        padding: 15px 20px;
        margin: -30px -30px 25px -30px;
        font-size: 1.25rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        border-bottom: 3px solid #667eea;
    }
    
    /* Button Styles */
    .btn-checkout {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border: none;
        padding: 12px 25px;
        font-size: 1rem;
        font-weight: 600;
        letter-spacing: 0.5px;
        transition: all 0.3s;
        color: #fff;
    }
    
    .btn-checkout:hover {
        background: linear-gradient(135deg, #5a6fd1 0%, #653d8f 100%);
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    }
    
    /* Summary Styles */
    .summary-item {
        padding: 15px 0;
        border-bottom: 1px dashed #e0e0e0;
    }
    
    .summary-item:last-child {
        border-bottom: none;
    }
    
    .total-price {
        font-size: 1.5rem;
        font-weight: 700;
        color: #2c3e50;
    }
    
    /* Responsive Adjustments */
    @media (max-width: 768px) {
        .gradient-header h1 {
            font-size: 2rem;
        }
        
        .order-section, .summary-section {
            padding: 20px;
        }
        
        .section-header {
            margin: -20px -20px 20px -20px;
        }
    }
    
    /* Animation for form focus */
    @keyframes pulse {
        0% { box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4); }
        70% { box-shadow: 0 0 0 10px rgba(102, 126, 234, 0); }
        100% { box-shadow: 0 0 0 0 rgba(102, 126, 234, 0); }
    }
    
    .form-control:focus {
        animation: pulse 1.5s infinite;
    }
    
    /* File Input Styling */
    .custom-file-input {
        opacity: 0;
        position: absolute;
        z-index: -1;
    }
    
    .custom-file-label {
        display: block;
        padding: 10px 15px;
        background: #f8f9fa;
        border: 1px dashed #ced4da;
        border-radius: 5px;
        text-align: center;
        cursor: pointer;
        transition: all 0.3s;
    }
    
    .custom-file-label:hover {
        background: #e9ecef;
        border-color: #adb5bd;
    }
    
    /* Error Message Styling */
    #error_id {
        padding: 15px;
        margin-bottom: 20px;
        border-radius: 5px;
        display: none;
    }
    
    .error-message {
        background: #fff3f3;
        border-left: 4px solid #ff6b6b;
        padding: 15px;
        margin-bottom: 20px;
        border-radius: 0 5px 5px 0;
    }
    
    /* Success Message Styling */
    .success-message {
        background: #f0fff4;
        border-left: 4px solid #48bb78;
        padding: 15px;
        margin-bottom: 20px;
        border-radius: 0 5px 5px 0;
    }


    .btn-promo {
      background: linear-gradient(135deg, #4e73df 0%, #224abe 100%);
      color: white;
      border: none;
    }
    #check_promocode{
        color: #fff;
    }