/*  
---------------------------------------------------
Back to top
---------------------------------------------------  
*/

.usn_back-to-top { 
    display:block;
    transition: bottom 0.3s ease-in-out 0s, opacity 0.3s ease-in-out 0s, box-shadow 0.3s ease-in-out 0s;
    position:fixed; 
    bottom: 184px;
    right: 84px;
    width: 45px;
    height: 45px;
    z-index:903;
    border-radius: var(--btn-border-radius);
    
    /* Safari OSX, iOS performance improvements */ 
    will-change: transform, bottom;
}
.usn_back-to-top a.btn i { 
    position:absolute; top:50%; left:50%;
    transform:translate(-50%,-50%);
}

/* html.nav-down:not(.reached-top) .usn_back-to-top,
html.nav-up .usn_back-to-top {
    bottom: 184px;
} */

.usn_back-to-top a.btn { 
    font-size:25px; 
    margin:0;
    border: none;
    padding: 0;
}

.usn_back-to-top.position-left {
    left: var(--backtotop-spacing_side_lg);
}
.usn_back-to-top.position-center {
    left: 50%; 
    transform:translateX(-50%);
}
.usn_back-to-top.position-right {
    right: 84px;
}