#button-up{background:var(--first-color);color:#fff;cursor:pointer;z-index:999;border:4px solid #0000;border-radius:50%;justify-content:center;align-items:center;width:60px;height:60px;font-size:20px;transition:all .3s;display:flex;position:fixed;bottom:50px;right:50px;transform:scale(0)}#button-up:hover{border-color:#0000001a;transform:scale(1.1)}