.my-lightbox {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 30px;
    box-sizing: border-box;
}

.my-lightbox.is-open { display: flex; }

.my-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.88);
}

.my-lightbox__figure {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    max-width: 92vw;
    max-height: 92vh;
    margin: 0;
}

.my-lightbox__image {
    display: block;
    max-width: 92vw;
    max-height: 84vh;
    width: auto;
    height: auto;
    object-fit: contain;
}

.my-lightbox__caption {
    max-width: 92vw;
    color: #fff;
    font-size: 14px;
    line-height: 1.6;
    text-align: center;
}

.my-lightbox__close {
    position: absolute;
    z-index: 3;
    top: 14px;
    right: 18px;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: rgba(255,255,255,.95);
    color: #222;
    font-size: 30px;
    line-height: 42px;
    text-align: center;
    cursor: pointer;
}

@media (max-width: 600px) {
    .my-lightbox { padding: 18px; }
    .my-lightbox__image { max-width: 96vw; max-height: 82vh; }
    .my-lightbox__caption { max-width: 96vw; font-size: 13px; }
    .my-lightbox__close { top: 10px; right: 10px; }
}