#backtotop {
    width: 42.35px;
    line-height: 42.35px;
    border-radius: 7.26px;
    overflow: hidden;
    z-index: 999;
    display: none; 
    cursor: pointer;
    position: fixed;
    bottom: 20px;
    right: 20px;  
    background-color: #ffffff;
    color: #333; 
    border: 1px solid #d6d6d6;
    text-align: center;
    font-size: 30.25px;
    text-decoration: none;
    opacity: 0; 
}

body:has(#topiclist) #backtotop {
    bottom: 74.35px;
} 

#backtotop:hover {
    background-color: #e6f0ff !important;
    color: #0052cc !important;
    opacity: 1 !important;
}