.js-lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    padding: 40px;
    box-sizing: border-box;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease;
}

.js-lightbox-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.js-lightbox-overlay img {
    max-width: 100%;
    max-height: 100%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    border-radius: 4px;
}

.js-lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #fff;
    font-size: 40px;
    line-height: 1;
    font-family: Arial, sans-serif;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
}

.js-lightbox-close:hover {
    color: #ccc;
}