:root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #34495e;
            --success: #27ae60;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            padding-top: 20px;
            padding-bottom: 40px;
        }
        
        .payment-container {
            max-width: 900px;
            margin: 0 auto;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            border-radius: 15px;
            overflow: hidden;
            background: white;
        }
        
        .payment-header {
            background: var(--primary);
            color: white;
            padding: 25px 30px;
            position: relative;
        }
        
        .payment-header::after {
            content: '';
            position: absolute;
            bottom: -20px;
            left: 0;
            width: 100%;
            height: 20px;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%232c3e50" fill-opacity="1" d="M0,192L60,181.3C120,171,240,149,360,154.7C480,160,600,192,720,192C840,192,960,160,1080,138.7C1200,117,1320,107,1380,101.3L1440,96L1440,320L1380,320C1320,320,1200,320,1080,320C960,320,840,320,720,320C600,320,480,320,360,320C240,320,120,320,60,320L0,320Z"></path></svg>') no-repeat;
            background-size: cover;
        }
        
        .payment-body {
            padding: 30px;
        }
        
        .section-title {
            color: var(--primary);
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 10px;
            margin-bottom: 20px;
            font-weight: 600;
        }
        
        .form-label {
            font-weight: 500;
            color: var(--dark);
        }
        
        .form-control, .form-select {
            border: 1px solid #dce1e6;
            border-radius: 8px;
            padding: 12px 15px;
            transition: all 0.3s;
        }
        
        .form-control:focus, .form-select:focus {
            border-color: var(--secondary);
            box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
        }
        
        .invoice-card {
            background: var(--light);
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            margin-bottom: 25px;
            border-left: 4px solid var(--secondary);
        }
        
        .invoice-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: 15px;
        }
        
        .invoice-label {
            font-weight: 600;
            color: var(--dark);
        }
        
        .invoice-value {
            font-weight: 500;
            color: var(--primary);
        }
        
        .total-amount {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent);
            text-align: right;
        }
        
        .payment-methods {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .payment-method {
            flex: 1;
            text-align: center;
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .payment-method:hover, .payment-method.active {
            border-color: var(--secondary);
            background: rgba(52, 152, 219, 0.1);
        }
        
        .payment-method i {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 10px;
        }
        
        .checkbox-custom {
            position: relative;
            padding-left: 30px;
            cursor: pointer;
            user-select: none;
        }
        
        .checkbox-custom input {
            position: absolute;
            opacity: 0;
            cursor: pointer;
            height: 0;
            width: 0;
        }
        
        .checkmark {
            position: absolute;
            top: 0;
            left: 0;
            height: 22px;
            width: 22px;
            background-color: white;
            border: 2px solid var(--secondary);
            border-radius: 5px;
        }
        
        .checkbox-custom:hover input ~ .checkmark {
            background-color: #f1f1f1;
        }
        
        .checkbox-custom input:checked ~ .checkmark {
            background-color: var(--secondary);
        }
        
        .checkmark:after {
            content: "";
            position: absolute;
            display: none;
        }
        
        .checkbox-custom input:checked ~ .checkmark:after {
            display: block;
        }
        
        .checkbox-custom .checkmark:after {
            left: 7px;
            top: 3px;
            width: 5px;
            height: 10px;
            border: solid white;
            border-width: 0 3px 3px 0;
            transform: rotate(45deg);
        }
        
        .btn-pay {
            background: linear-gradient(to right, var(--secondary), var(--primary));
            color: white;
            font-weight: 600;
            padding: 14px 30px;
            border: none;
            border-radius: 8px;
            font-size: 1.1rem;
            transition: all 0.3s;
            width: 100%;
            letter-spacing: 1px;
        }
        
        .btn-pay:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(52, 152, 219, 0.4);
        }
        
        .bank-info {
            background: var(--light);
            border-radius: 10px;
            padding: 20px;
            margin-top: 30px;
            border-left: 4px solid var(--success);
        }
        
        .bank-info-title {
            color: var(--success);
            font-weight: 600;
            margin-bottom: 15px;
        }
        
        .bank-info-text {
            color: var(--dark);
            line-height: 1.8;
            margin-bottom: 5px;
        }
        
        .note-box {
            background: #e3f2fd;
            border-radius: 8px;
            padding: 15px;
            margin-top: 15px;
            font-size: 0.9rem;
            color: var(--dark);
            border-left: 3px solid var(--secondary);
        }
        
        .tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }
        
        .tab {
            flex: 1;
            padding: 12px;
            text-align: center;
            background: #e9ecef;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .tab.active {
            background: var(--secondary);
            color: white;
        }
        
        .credit-card-input {
            position: relative;
        }
        
        .credit-card-input i {
            position: absolute;
            right: 15px;
            top: 12px;
            font-size: 1.5rem;
            color: var(--dark);
        }
        
        .payment-details {
            display: none;
        }
        
        .payment-details.active {
            display: block;
        }
        
        .g-recaptcha {
            margin: 20px 0;
            display: flex;
            justify-content: center;
        }
        
        .product-select-container {
            margin-bottom: 20px;
        }
        
        @media (max-width: 768px) {
            .payment-methods {
                flex-direction: column;
            }
            
            .payment-method {
                width: 100%;
            }
        }
.payment-header {
    background: var(--primary);
    color: white;
    padding: 25px 30px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.payment-header::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    width: 100%;
    height: 20px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%232c3e50" fill-opacity="1" d="M0,192L60,181.3C120,171,240,149,360,154.7C480,160,600,192,720,192C840,192,960,160,1080,138.7C1200,117,1320,107,1380,101.3L1440,96L1440,320L1380,320C1320,320,1200,320,1080,320C960,320,840,320,720,320C600,320,480,320,360,320C240,320,120,320,60,320L0,320Z"></path></svg>') no-repeat;
    background-size: cover;
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.9;
    letter-spacing: 0.5px;
}

.security-badge {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    padding: 8px 15px;
    border-radius: 30px;
    margin-top: 15px;
    font-size: 0.9rem;
}

.security-badge img {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .payment-header {
        padding: 20px 15px;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .security-badge {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
}