#return-to-top {
        position: fixed;
        bottom: 20px;
        right: 20px;
       
        background: rgba(73, 122, 255, .8);
        width: 50px;
        height: 50px;
        display: block;
        text-decoration: none;
        z-index:99;
        -webkit-border-radius: 35px;
        -moz-border-radius: 35px;
        border-radius: 35px;
        display: none;
        -webkit-transition: all 0.3s linear;
        -moz-transition: all 0.3s ease;
        -ms-transition: all 0.3s ease;
        -o-transition: all 0.3s ease;
        transition: all 0.3s ease;
    }
    
    
#return-to-top i {
        color: white;
        margin: 0;
        position: relative;
       
        padding-left: 15px;
        top: 15px;
       
        font-size: 20px;
        
        
        -webkit-transition: all 0.3s ease;
        -moz-transition: all 0.3s ease;
        -ms-transition: all 0.3s ease;
        -o-transition: all 0.3s ease;
        transition: all 0.3s ease;
    }
#return-to-top:hover {
        background: green;
        -webkit-transition: all 0.3s linear;
        -moz-transition: all 0.3s ease;
        -ms-transition: all 0.3s ease;
        -o-transition: all 0.3s ease;
        transition: all 0.3s ease;
    }
#return-to-top:hover i {
        color: yellow;
        top: 5px;
    }