.btn.btn-primary.back-to-top-btn{position:fixed;display:block;bottom:30px;right:30px;width:50px;height:50px;min-width:0;padding:0;border-radius:100%;opacity:0;z-index:250}.btn.btn-primary.back-to-top-btn.visible{opacity:1}.btn.btn-primary.back-to-top-btn i{display:flex;align-items:center;justify-content:center;width:100%;height:100%;font-size:20px;font-weight:600}