/* Cadre video 16/9, repris du <style> de index.html. */
.video-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
}
.video-frame iframe,
.video-frame .video-placeholder {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}