.thumbnail {
    width: 120px;
    height: 80px;
    object-fit: cover;
    cursor: pointer;
    margin: 5px;
}

/* The dark overlay */
.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    align-items: center;
    justify-content: center;
}

/* Large image */
.lightbox img {
    max-width: 85%;
    max-height: 85%;
}

/* Navigation arrows */
.prev, .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: white;
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
    padding: 20px;
    user-select: none;
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
}

.prev:hover, .next:hover {
    color: #ccc;
}

/* Close button */
.close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    cursor: pointer;
}