/* Couche YouTube isolée. Ne change pas footer, boutons, equalizer, menus ou layout. */
.ultimix-youtube-bg-layer {
    position: absolute;
    inset: calc(var(--cover-blurred, 1rem) * -5);
    z-index: 1;
    overflow: hidden;
    pointer-events: none !important;
    opacity: 0;
    transition: opacity .6s ease;
    background: transparent;
}
.ultimix-youtube-bg-layer.is-active { opacity: .34; }
.ultimix-youtube-bg-layer iframe {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 177.78vh;
    height: 100vh;
    min-width: 100vw;
    min-height: 56.25vw;
    transform: translate(-50%, -50%);
    border: 0;
    pointer-events: none !important;
}
@supports (height: 100dvh) {
    .ultimix-youtube-bg-layer iframe { width: 177.78dvh; height: 100dvh; }
}
@media (max-width: 768px) {
    .ultimix-youtube-bg-layer.is-active { opacity: .22; }
    .ultimix-youtube-bg-layer iframe {
        width: 177.78svh;
        height: 100svh;
        min-width: 100vw;
        min-height: 56.25vw;
    }
}