:root {
            --primary-color: #2C3E50;
            --secondary-color: #3498DB;
            --accent-color: #E74C3C;
            --success-color: #2ECC71;
            --warning-color: #F1C40F;
            --text-primary: #2C3E50;
            --text-secondary: #7F8C8D;
            --bg-gradient: linear-gradient(135deg, #EBF4F5 0%, #B5C6E0 100%);
            --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --hover-transform: translateY(-5px);
        }

        body {
            background: var(--bg-gradient);
            min-height: 100vh;
            font-family: 'Inter', sans-serif;
            color: var(--text-primary);
            line-height: 1.6;
        }

        .product-detail-card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 24px;
            box-shadow: var(--card-shadow);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            overflow: hidden;
            margin: 2rem auto;
            max-width: 1200px;
        }

        .product-header {
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 2.5rem 2rem;
            position: relative;
            overflow: hidden;
        }

        .product-header h1 {
            font-size: 2.2rem;
            font-weight: 700;
            margin: 0;
            position: relative;
            z-index: 2;
        }

        .product-header::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-color), var(--warning-color));
        }

        .gallery-container {
            background: white;
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .gallery-container:hover {
            transform: var(--hover-transform);
            box-shadow: var(--card-shadow);
        }

        .main-image {
            width: 100%;
            height: 400px;
            object-fit: contain;
            border-radius: 12px;
            margin-bottom: 1rem;
            background: #F8F9FA;
            transition: all 0.3s ease;
        }

        .thumbnail-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
            gap: 10px;
            padding: 1rem 0;
        }

        .thumbnail {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .thumbnail:hover {
            transform: scale(1.1);
            border-color: var(--secondary-color);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .info-section {
            background: white;
            border-radius: 16px;
            padding: 1.5rem;
            margin-bottom: 1rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .info-section:hover {
            transform: var(--hover-transform);
            box-shadow: var(--card-shadow);
        }

        .important-info {
            border: 2px solid var(--accent-color);
            animation: pulse 2s infinite;
            position: relative;
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.4);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(231, 76, 60, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(231, 76, 60, 0);
            }
        }

        .section-title {
            color: var(--primary-color);
            font-weight: 600;
            font-size: 1.25rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary-color);
            position: relative;
        }

        .important-info .section-title {
            color: var(--accent-color);
            border-bottom-color: var(--accent-color);
        }

        .btn-custom {
            padding: 0.8rem 1.5rem;
            border-radius: 50px;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            border: none;
            margin: 5px;
            position: relative;
            overflow: hidden;
        }

        .btn-custom::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: 0.5s;
        }

        .btn-custom:hover::before {
            left: 100%;
        }

        .btn-demo {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}
		.btn-demo i {
    transform: translateY(0);
    opacity: 1;
    transition: all 0.3s ease;
}
		.btn-demo:hover i {
    animation: deviceIcons 1.5s infinite;
}
		@keyframes deviceIcons {
    0% {
        transform: translateY(0);
    }
    20% {
        transform: translateY(-3px);
    }
    40% {
        transform: translateY(0);
    }
}

.btn-demo:hover i:nth-child(2) {
    animation-delay: 0.2s;
}

.btn-demo:hover i:nth-child(3) {
    animation-delay: 0.4s;
}

.btn-demo::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 70%);
    transform: scale(0);
    opacity: 0;
    transition: transform 0.6s, opacity 0.6s;
}

.btn-demo:hover::after {
    transform: scale(1);
    opacity: 1;
}

        .btn-admin {
            background: var(--primary-color);
            color: white;
        }

        .btn-back {
            background: var(--text-secondary);
            color: white;
        }

        .btn-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            color: white;
        }

        .stock-badge {
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .stock-badge.active {
            background: var(--success-color);
            color: white;
        }

        .stock-badge.inactive {
            background: var(--accent-color);
            color: white;
        }

        /* Loading Animation */
        .loading {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--bg-gradient);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
        }

        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 4px solid var(--secondary-color);
            border-top: 4px solid transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @media (max-width: 768px) {
            .product-header h1 {
                font-size: 1.8rem;
            }

            .btn-custom {
                padding: 0.6rem 1.2rem;
                font-size: 0.9rem;
            }

            .main-image {
                height: 300px;
            }
        }

        :root {
            --primary-color: #2D3436;
            --secondary-color: #0052CC;
            --accent-color: #00B8D9;
            --dark-bg: #F4F5F7;
            --card-bg: #FFFFFF;
            --text-primary: #2D3436;
            --text-secondary: #5E6C84;
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
            --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
            --gradient-primary: linear-gradient(135deg, #0052CC, #00B8D9);
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        body {
            background: var(--dark-bg);
            font-family: 'Inter', sans-serif;
            color: var(--text-primary);
            line-height: 1.6;
        }

        /* Header Styles */
        .page-header {
            background: var(--card-bg);
            padding: 2rem 0;
            margin-bottom: 3rem;
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--gradient-primary);
        }

        .page-header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: center;
            margin: 0;
        }

        /* Sidebar Styles */
        .sidebar {
            background: var(--card-bg);
            border-radius: 12px;
            box-shadow: var(--shadow-md);
            padding: 25px;
            position: sticky;
            top: 20px;
        }

        .sidebar h4 {
            color: var(--text-primary);
            font-weight: 600;
            padding-bottom: 1rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid var(--secondary-color);
        }

        .category-item {
            background: var(--dark-bg);
            border-radius: 8px;
            padding: 12px 15px;
            margin-bottom: 10px;
            transition: var(--transition-smooth);
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            cursor: pointer;
        }

        .category-item.active,
        .category-item:hover {
            background: var(--gradient-primary);
            color: white;
            transform: translateX(5px);
            box-shadow: var(--shadow-md);
        }

        .category-icon {
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.2);
            transition: var(--transition-smooth);
        }

        .category-item:hover .category-icon {
            transform: rotate(360deg);
        }

        /* Product Card Styles */
        .product-card {
            background: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition-smooth);
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .product-image-container {
            height: 250px;
            position: relative;
            overflow: hidden;
        }

        .product-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

        .product-card:hover .product-image {
            transform: scale(1.1);
        }

        .product-gallery {
            background: var(--dark-bg);
            padding: 10px;
            display: flex;
            gap: 10px;
            overflow-x: auto;
            scrollbar-width: thin;
        }

        .product-gallery img {
            width: 60px;
            height: 60px;
            border-radius: 6px;
            transition: var(--transition-smooth);
            cursor: pointer;
            border: 2px solid transparent;
        }

        .product-gallery img:hover {
            transform: scale(1.1);
            border-color: var(--secondary-color);
        }

        .product-info {
            padding: 1.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .card-title {
            color: var(--text-primary);
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .btn-container {
            margin-top: auto;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .btn-custom {
            background: var(--gradient-primary);
            border: none;
            border-radius: 6px;
            padding: 10px 20px;
            color: white;
            font-weight: 500;
            transition: var(--transition-smooth);
            text-decoration: none;
            text-align: center;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-custom:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: white;
        }

        .btn-custom i {
            font-size: 1.1em;
        }

        /* Hidden class for filtering */
        .hidden {
            display: none !important;
        }

        /* Loading Animation */
        .loading {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--dark-bg);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
        }

        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 4px solid var(--secondary-color);
            border-top: 4px solid transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        /* Animations */
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

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

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--dark-bg);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--secondary-color);
            border-radius: 3px;
        }

        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .sidebar {
                position: relative;
                top: 0;
                margin-bottom: 2rem;
            }

            .product-card {
                margin-bottom: 1.5rem;
            }
        }