#backToTop{position:fixed;right:30px;bottom:30px;width:58px;height:58px;display:flex;align-items:center;justify-content:center;text-decoration:none;background:linear-gradient(135deg,#2563eb,#4f46e5);color:#fff;border-radius:18px;box-shadow:0 18px 40px rgba(37,99,235,.35);opacity:0;visibility:hidden;transform:translateY(20px);transition:all .35s ease;z-index:9999}#backToTop svg{width:24px;height:24px}#backToTop.show{opacity:1;visibility:visible;transform:translateY(0)}#backToTop:hover{transform:translateY(-6px);background:linear-gradient(135deg,#1d4ed8,#4338ca);box-shadow:0 24px 50px rgba(37,99,235,.45)}#backToTop:active{transform:scale(.95)}@media (max-width:768px){#backToTop{width:50px;height:50px;right:20px;bottom:20px}#backToTop svg{width:20px;height:20px}}