#lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    padding: 1rem;
    align-items: center;
    justify-content: center;
}

#lightbox-overlay.is-hidden {
    display: none;
}

#lightbox-overlay.is-visible {
    display: flex;
}

#lightbox-overlay button {
    position: absolute;
    color: #fff;
    font-size: 2rem;
    line-height: 1;
    background: none;
    border: none;
    cursor: pointer;
}

#lightbox-close { top: 1rem; right: 1rem; }
#lightbox-prev  { left: 1rem; top: 50%; transform: translateY(-50%); }
#lightbox-next  { right: 1rem; top: 50%; transform: translateY(-50%); }

#lightbox-image {
    max-height: 90vh;
    max-width: 90vw;
    object-fit: contain;
}