/* --- GALLERY PREMIUM STYLE --- */

/* 1. Filter Buttons */
.btn-filter {
    border: 1px solid #e0e0e0;
    padding: 10px 25px;
    border-radius: 50px;
    background: #fff;
    color: #64748b;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

    .btn-filter:hover,
    .btn-filter.active {
        background: var(--primary-color, #0046ba);
        color: #fff;
        border-color: var(--primary-color, #0046ba);
        box-shadow: 0 5px 15px rgba(0, 70, 186, 0.3);
        transform: translateY(-2px);
    }

/* 2. Gallery Card */
.gallery-card {
    cursor: pointer;
    position: relative;
    height: 300px; /* Chiều cao cố định để grid đều đẹp */
    background: #0000000f; /* Nền đen để tránh lóe trắng khi load ảnh */
}

.gallery-img {
    height: 100%;
    object-fit: cover; /* Đảm bảo ảnh full khung không méo */
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    opacity: 0.95;
}

/* Hiệu ứng Zoom ảnh khi hover */
.gallery-card:hover .gallery-img {
    transform: scale(1.1); /* Phóng to 1.1 lần */
    opacity: 1;
}

/* 3. Overlay (Lớp phủ) */
.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 50%, rgba(0,0,0,0) 100%);
    opacity: 0; /* Mặc định ẩn */
    transition: all 0.4s ease;
}

.gallery-card:hover .gallery-overlay {
    opacity: 1; /* Hiện khi hover */
}

/* Nội dung bên trong overlay */
.overlay-content {
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

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

/* Nút icon mở rộng */
.btn-view-large {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(5px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s;
}

    .btn-view-large:hover {
        background: #fff;
        color: var(--primary-color, #0046ba);
    }

/* 4. Animation khi lọc (Fade In) */
.gallery-item-col {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}