:root {
            --primary: #6a5acd;      /* Slate blue */
            --secondary: #ff69b4;    /* Hot pink */
            --accent: #ff1493;       /* Deep pink */
            --light-blue: #e6f0ff;   /* Very light blue */
            --light-pink: #fff0f5;   /* Lavender blush */
            --dark: #4b0082;         /* Indigo */
            --text: #333333;
            --light: #f8f9fa;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--text);
            background-color: #fefefe;
        }
        
        .navbar {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: white !important;
        }
        
        .nav-link {
            color: rgba(255,255,255,0.85) !important;
            font-weight: 500;
        }
        
        .nav-link:hover, .nav-link.active {
            color: white !important;
        }
        
        .page-header {
            background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-pink) 100%);
            padding: 60px 0 40px;
            margin-bottom: 30px;
        }
        
        .checkout-container {
            margin-bottom: 50px;
        }
        
        .checkout-progress {
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            padding: 25px;
            margin-bottom: 30px;
        }
        
        .progress-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
        }
        
        .progress-steps:before {
            content: '';
            position: absolute;
            top: 15px;
            left: 0;
            right: 0;
            height: 3px;
            background: #eee;
            z-index: 1;
        }
        
        .progress-bar-active {
            position: absolute;
            top: 15px;
            left: 0;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            z-index: 2;
            transition: width 0.5s;
            width: 66%;
        }
        
        .step {
            display: flex;
            flex-direction: column;
            align-items: center;
            position: relative;
            z-index: 3;
        }
        
        .step-icon {
            width: 35px;
            height: 35px;
            border-radius: 50%;
            background: white;
            border: 3px solid #eee;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 8px;
            transition: all 0.3s;
        }
        
        .step.active .step-icon {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            border-color: var(--primary);
            color: white;
        }
        
        .step.completed .step-icon {
            background: var(--secondary);
            border-color: var(--secondary);
            color: white;
        }
        
        .step.completed .step-icon:after {
            content: '\f00c';
            font-family: 'Font Awesome 5 Free';
            font-weight: 900;
        }
        
        .step-label {
            font-size: 0.9rem;
            font-weight: 600;
            color: #666;
        }
        
        .step.active .step-label {
            color: var(--dark);
        }
        
        .checkout-form-section {
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            padding: 30px;
            margin-bottom: 30px;
        }
        
        .section-title {
            position: relative;
            margin-bottom: 1.5rem;
            font-weight: 700;
            color: var(--dark);
            padding-bottom: 10px;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            border-radius: 2px;
        }
        
        .form-label {
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 8px;
        }
        
        .form-control {
            border: 1px solid #ddd;
            border-radius: 8px;
            padding: 12px 15px;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 0.25rem rgba(106, 90, 205, 0.25);
        }
        
        .form-check-input:checked {
            background-color: var(--primary);
            border-color: var(--primary);
        }
        
        .shipping-methods {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 20px;
        }
        
        .shipping-method {
            border: 2px solid #eee;
            border-radius: 8px;
            padding: 15px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .shipping-method:hover {
            border-color: var(--light-blue);
        }
        
        .shipping-method.selected {
            border-color: var(--primary);
            background-color: var(--light-blue);
        }
        
        .payment-methods {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .payment-method {
            flex: 1;
            border: 2px solid #eee;
            border-radius: 8px;
            padding: 15px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .payment-method:hover {
            border-color: var(--light-blue);
        }
        
        .payment-method.selected {
            border-color: var(--primary);
            background-color: var(--light-blue);
        }
        
        .payment-icon {
            font-size: 2rem;
            margin-bottom: 10px;
            color: var(--primary);
        }
        
        .order-summary {
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            padding: 25px;
            position: sticky;
            top: 20px;
        }
        
        .order-items {
            max-height: 300px;
            overflow-y: auto;
            margin-bottom: 20px;
        }
        
        .order-item {
            display: flex;
            padding: 15px 0;
            border-bottom: 1px solid #eee;
        }
        
        .order-item:last-child {
            border-bottom: none;
        }
        
        .order-item-image {
            width: 60px;
            height: 80px;
            object-fit: cover;
            border-radius: 6px;
            margin-right: 15px;
        }
        
        .order-item-details {
            flex-grow: 1;
        }
        
        .order-item-title {
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 5px;
            font-size: 0.95rem;
        }
        
        .order-item-author {
            color: #666;
            font-size: 0.85rem;
            margin-bottom: 5px;
        }
        
        .order-item-price {
            font-weight: 700;
            color: var(--accent);
        }
        
        .order-item-quantity {
            color: #666;
            font-size: 0.9rem;
        }
        
        .summary-row {
            display: flex;
            justify-content: space-between;
            margin-bottom: 12px;
        }
        
        .summary-label {
            color: #666;
        }
        
        .summary-value {
            font-weight: 600;
        }
        
        .summary-total {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent);
            margin-top: 15px;
            padding-top: 15px;
            border-top: 2px solid var(--light-blue);
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            border: none;
            border-radius: 30px;
            padding: 15px 30px;
            font-weight: 600;
            transition: all 0.3s;
            width: 100%;
            margin-top: 20px;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(106, 90, 205, 0.4);
        }
        
        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
            border: none;
            border-radius: 30px;
            padding: 15px 30px;
            font-weight: 600;
            transition: all 0.3s;
            width: 100%;
        }
        
        .btn-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255, 105, 180, 0.4);
        }
        
        .btn-outline-primary {
            border: 2px solid var(--primary);
            color: var(--primary);
            border-radius: 30px;
            padding: 12px 25px;
            font-weight: 600;
            transition: all 0.3s;
            width: 100%;
            margin-top: 15px;
        }
        
        .btn-outline-primary:hover {
            background: var(--primary);
            color: white;
        }
        
        .security-badges {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 25px;
        }
        
        .security-badge {
            text-align: center;
        }
        
        .security-icon {
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 8px;
        }
        
        .security-text {
            font-size: 0.8rem;
            color: #666;
        }
        
        .footer {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            padding: 60px 0 30px;
            margin-top: 50px;
        }
        
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            transition: all 0.3s;
        }
        
        .social-links a:hover {
            background: var(--secondary);
            transform: translateY(-3px);
        }
        
        .form-section {
            display: none;
        }
        
        .form-section.active {
            display: block;
        }
        
        .same-as-shipping {
            margin-top: 15px;
        }
        
        @media (max-width: 768px) {
            .payment-methods {
                flex-direction: column;
            }
            
            .progress-steps {
                flex-wrap: wrap;
                gap: 15px;
            }
            
            .step {
                flex: 1;
                min-width: 80px;
            }
        }