.zk-lightbox-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.zk-lightbox-overlay.show {
    display: flex;
    opacity: 1;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

.zk-lightbox-content {
    width: 90vw;
    max-width: 1200px;
    height: 99vh;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.zk-lightbox-close {
    position: absolute;
    top: 12px;
    right: 12px;
    background: #000;
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    cursor: pointer;
    z-index: 10;
    border: none;
}

.zk-lightbox-close {
    transition: opacity 0.2s ease;
}

.zk-lightbox-iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .zk-lightbox-content {
        width: 95vw;
        height: 92vh;
    }
}