#retour-haut{position:fixed;bottom:30px;right:30px;width:48px;height:48px;background-color:#20AA9E;color:#ffffff;border:none;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 12px rgba(44,44,44,0.18);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s ease,transform .3s ease,background-color .3s ease;z-index:9990}#retour-haut.visible{opacity:1;visibility:visible;transform:translateY(0)}#retour-haut:hover{background-color:#1D6090}#retour-haut:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(253,192,38,0.65)}#retour-haut svg{width:20px;height:20px}@media (max-width:600px){#retour-haut{bottom:20px;right:20px;width:44px;height:44px}}@media (prefers-reduced-motion:reduce){#retour-haut{transition:opacity .2s ease}}