.btn-back-to-top{bottom:30px;display:block;height:40px;opacity:0;position:fixed;right:40px;text-decoration:none;transform:rotate(-90deg);transition:opacity .2s ease;width:30px;z-index:9999}.btn-back-to-top svg{height:100%;width:100%}.btn-back-to-top.faded{opacity:1}