.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.lightbox-img {
    max-width: 90%;
    max-height: 90%;
    border: 4px solid #fff;
    border-radius: 10px;
}