*,:after,:before{box-sizing:border-box}.button-add{position:fixed;bottom:40px;right:40px;width:60px;height:60px;background-color:#ff3c00;color:#fff;border-radius:50%;font-size:36px;box-shadow:0 4px 8px rgba(0,0,0,.3);transition:background-color .3s;cursor:pointer}