#ScrollUpToTop {
position:fixed;
right:30px;
bottom:30px;
width:50px;
height:50px;
z-index:1000;
border:none;
border-radius:5px;
background:rgba(0,0,0,.4);
color:#FFF;
font-size:40px;
text-align:center;
padding-top:10px;
}

#ScrollUpToTop:hover {
background:rgba(0,0,0,.7);
}