.nav-link.active {
            position: relative;
        }
        
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--bs-primary);
        }

        .hero-section {
            background: var(--bs-primary);
            background: linear-gradient(45deg, var(--bs-primary) 0%, var(--bs-primary-bg-subtle) 100%);
        }

        .product-card {
            transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
        }

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

        .spec-badge {
            font-size: 0.875rem;
            padding: 0.5rem 1rem;
            border-radius: var(--bs-border-radius-pill);
            background-color: var(--bs-secondary-bg);
        }

        .filter-section {
            position: sticky;
            top: 80px;
        }

        .theme-toggle {
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle:hover {
            background-color: var(--bs-secondary-bg);
        }