body {
    background-color: #f0f8ff;
}

/* Styling cho danh sách album */
.album-card {
    cursor: pointer;
    transition: transform 0.2s ease-in-out;
    border: none;
}

    .album-card:hover {
        transform: translateY(-5px);
    }

/* Styling cho Lightbox View */
#lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1050;
    background: #000;
}

.main-img {
    max-height: 90vh;
    object-fit: contain;
}

.btn-close-custom {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    color: white;
    font-size: 40px;
    z-index: 1100;
    cursor: pointer;
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.2);
    border: none;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
}

    .nav-btn:hover {
        background: rgba(255,255,255,0.4);
    }

    .nav-btn.prev {
        left: 20px;
    }

    .nav-btn.next {
        right: 20px;
    }

/* Sidebar Thumbnails */
.blue-line {
    height: 3px;
    background: #0d6efd;
    width: 60px;
    margin-top: 5px;
}

.thumb-item {
    aspect-ratio: 4/3;
    object-fit: cover;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 4px;
}

.thumb-wrapper.active .thumb-item {
    border-color: #0d6efd;
    filter: brightness(0.6);
}

#thumb-container::-webkit-scrollbar {
    width: 6px;
}

#thumb-container::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 10px;
}