/* Conteneur global */
.container-images {
    max-width: 1000px;
    margin: 50px auto;
    padding: 0 20px;
}

/* lignes A4 */
.a4-row {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

/* 3 images */
.a4-row.row-3 img {
    width: calc(33.333% - 14px);
    height: 220px;
    object-fit: cover;
    border-radius: 18px;
    cursor: pointer;
    transition: transform .25s ease, opacity .25s ease;
}

/* 2 images */
.a4-row.row-2 img {
    width: calc(50% - 10px);
    height: 300px;
    object-fit: cover;
    border-radius: 18px;
    cursor: pointer;
    transition: transform .25s ease, opacity .25s ease;
}

.a4-row img:hover {
    transform: scale(.97);
    opacity: .85;
}

/* Version mobile */
@media (max-width: 768px) {
    .a4-row {
        flex-direction: column;
    }

    .a4-row img {
        width: 100% !important;
        height: auto !important;
    }
}

/* Lightbox */
#lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    justify-content: center;
    align-items: center;
    z-index: 999999;
}

#lightbox img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: 16px;
}