.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,96C1248,75,1344,53,1392,42.7L1440,32L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.5;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.page-header p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.section-title p {
    font-size: 1.15rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.category-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 2rem;
    border-radius: 50px;
    border: 2px solid #e9ecef;
    background: var(--white);
    color: var(--dark);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    border-color: transparent;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    border: none;
}

.product-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    height: 260px;
    overflow: hidden;
}

.product-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, opacity 0.3s ease;
    display: block;
    margin: 0 auto;
    opacity: 0;
}

.product-card img.loaded {
    opacity: 1;
}

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 95, 122, 0.85) 0%, rgba(21, 152, 149, 0.85) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-card .view-btn {
    background: var(--white);
    color: var(--primary);
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
}

.product-card .view-btn:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: scale(1.05);
}

.product-card .card-body {
    padding: 1.25rem 2rem;
}

.product-card .card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
    text-align: center;
}

.product-title-link {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.product-title-link:hover {
    color: var(--primary);
}

.product-title-link:hover .card-title {
    color: var(--primary);
}

.product-card .card-text {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.product-features {
    list-style: none;
    padding: 0;
    margin-bottom: 1.5rem;
}

.product-features li {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.product-features li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 700;
}

.btn-custom {
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    display: inline-block;
}

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

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.product-card .card-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.product-card .card-actions .btn-custom {
    flex: 0 0 auto;
    text-align: center;
    padding: 0.55rem 1.5rem;
    font-size: 0.85rem;
}

.btn-outline-custom {
    background: var(--primary) !important;
    color: var(--white) !important;
    border: 2px solid var(--primary) !important;
}

.btn-outline-custom:hover {
    background: var(--primary-dark) !important;
    color: var(--white) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.category-section {
    background: var(--light);
}

.tech-specs {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.tech-specs h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 2rem;
    text-align: center;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.spec-item {
    text-align: center;
    padding: 2rem;
    background: var(--light);
    border-radius: var(--radius);
    transition: var(--transition);
}

.spec-item:hover {
    background: rgba(26, 95, 122, 0.05);
    transform: translateY(-4px);
}

.spec-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--white);
    font-size: 1.75rem;
}

.spec-item h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.75rem;
}

.spec-item p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

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

.btn-light-custom:hover {
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.btn-outline-custom {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline-custom:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
    color: var(--white);
}

@media (max-width: 991px) {
    .page-header h1 {
        font-size: 2.5rem;
    }

    .section {
        padding: 80px 0;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 80px 0 60px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .page-header p {
        font-size: 1rem;
    }

    .section {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 1.75rem;
    }

    .filter-btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .tech-specs {
        padding: 2rem;
    }
}

@media (max-width: 576px) {
    .page-header h1 {
        font-size: 1.75rem;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }

    .tech-specs h3 {
        font-size: 1.5rem;
    }
}