/* Couches hors du flux : aucun changement de largeur ou de hauteur du site. */
.decoration { position: relative; --rs-decoration-dimming: .2; }
.decoration::after { content: ''; position: absolute; inset: 0; z-index: 1; background: #000; opacity: var(--rs-decoration-dimming); pointer-events: none; }
.decoration-layer { position: absolute; inset: 0; opacity: 0; background-position: center; background-size: cover; background-repeat: no-repeat; pointer-events: none; transition: opacity 900ms ease-in-out; }
.decoration-layer.is-visible { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
    .decoration-layer { transition: none; }
}