/* Native <dialog> ベースの lightbox（旧 fancybox の置き換え） */

dialog.lightbox {
    max-width: 90vw;
    max-height: 90vh;
    padding: 0;
    border: 0;
    background: transparent;
    overflow: visible;
}

dialog.lightbox::backdrop {
    background: rgba(0, 0, 0, 0.8);
}

.lightbox-image {
    display: block;
    max-width: 90vw;
    max-height: 90vh;
    margin: 0 auto;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.6);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: fixed;
    z-index: 1;
    padding: 0;
    width: 44px;
    height: 44px;
    line-height: 44px;
    text-align: center;
    font-size: 28px;
    color: #fff;
    background: rgba(0, 0, 0, 0.5);
    border: 0;
    border-radius: 4px;
    cursor: pointer;
}

.lightbox-close {
    top: 16px;
    right: 16px;
}

.lightbox-prev {
    top: 50%;
    left: 16px;
    transform: translateY(-50%);
}

.lightbox-next {
    top: 50%;
    right: 16px;
    transform: translateY(-50%);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(0, 0, 0, 0.8);
}