.back-to-top{color:#fff;cursor:pointer;z-index:100;background:#4f46e5;border:none;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;transition:all .2s;display:flex;position:fixed;bottom:24px;right:20px;box-shadow:0 4px 14px #4f46e54d}.back-to-top:hover{background:#4338ca;transform:translateY(-2px);box-shadow:0 6px 20px #4f46e566}@media (max-width:640px){.back-to-top{width:40px;height:40px;bottom:20px;right:16px}}