.ra-back-to-top{position:fixed;bottom:20px;z-index:1000;width:40px;height:40px;border:none;border-radius:50%;background-color:#222;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer}.ra-back-to-top--left{left:30px}.ra-back-to-top--right{right:30px}.ra-back-to-top--auto{scroll-behavior:auto}.ra-back-to-top--smooth{scroll-behavior:smooth}