#backToTop{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;border:0;background:linear-gradient(135deg,#00b2a9,#40c0f0);color:#0a1625;font-size:1.4rem;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:1000;opacity:0;visibility:hidden;transform:translateY(20px);transition:all .3s ease;box-shadow:0 4px 20px rgba(0,178,169,0.4)}#backToTop.show{opacity:1;visibility:visible;transform:translateY(0)}#backToTop:hover{transform:translateY(-3px);box-shadow:0 6px 25px rgba(0,178,169,0.5)}@media(max-width:768px){#backToTop{right:16px;bottom:16px;width:44px;height:44px}}