/* =========================================
           CSS เฉพาะสำหรับหน้า Capabilities (Gallery)
        ========================================= */
        .page-hero {
            /*background: linear-gradient(rgba(0, 51, 102, 0.8), rgba(0, 51, 102, 0.8)), 
                        url('https://images.unsplash.com/photo-1586528116311-ad8ed7c83a56?auto=format&fit=crop&q=80') no-repeat center center/cover;
            height: 40vh;
            min-height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: var(--white);
            margin-top: 60px; *//* เว้นระยะให้ Navbar */
            background: linear-gradient(rgba(0,51,102,0.8), rgba(0,51,102,0.8)), 
                url('../image/mainpage/hero.jpg');
            background-size: cover;
            background-position: center;
            padding: 100px 0;
            text-align: center;
            color: white;
        }

        .page-hero h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }

        .gallery-section {
            padding: 80px 0;
            background-color: #f8f9fa;
        }

        /* ปุ่ม Filter */
        .filter-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 40px;
        }

        .filter-btn {
            padding: 10px 25px;
            background: var(--white);
            border: 2px solid var(--secondary);
            color: var(--primary);
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .filter-btn:hover, .filter-btn.active {
            background: var(--secondary);
            color: var(--white);
        }

        /* ตารางแกลเลอรี่ภาพ */
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
        }

        .gallery-item {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            cursor: pointer;
            display: block; /* สำหรับ JS Filter */
        }

        .gallery-item img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s ease;
            display: block;
        }

        .gallery-item:hover img {
            transform: scale(1.1);
        }

        .gallery-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0, 51, 102, 0.9));
            color: white;
            padding: 20px;
            transform: translateY(100%);
            transition: transform 0.3s ease;
        }

        .gallery-item:hover .gallery-overlay {
            transform: translateY(0);
        }

        .gallery-overlay h3 {
            font-size: 1.2rem;
            margin: 0;
        }

        /* Lightbox (ระบบซูมภาพ) */
        .lightbox {
            display: none;
            position: fixed;
            z-index: 9999;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.9);
            align-items: center;
            justify-content: center;
        }

        .lightbox.active {
            display: flex;
        }

        .lightbox img {
            max-width: 90%;
            max-height: 90vh;
            border-radius: 5px;
            box-shadow: 0 0 20px rgba(0,0,0,0.5);
            animation: zoomIn 0.3s ease;
        }

        .lightbox-close {
            position: absolute;
            top: 20px;
            right: 30px;
            color: white;
            font-size: 3rem;
            cursor: pointer;
            transition: color 0.3s;
        }

        .lightbox-close:hover {
            color: var(--secondary);
        }

        @keyframes zoomIn {
            from { transform: scale(0.8); opacity: 0; }
            to { transform: scale(1); opacity: 1; }
        }

        .footer-info h2 {
            margin-top: 40px;
        }

        /* Mobile */
        @media (max-width: 768px) {
            .page-hero h1 { font-size: 2rem; }
            .filter-btn { padding: 8px 15px; font-size: 0.9rem; }
        }