.btntop{
    opacity: 1;
    position: fixed;
    bottom: 40px;
    right: 50px;
    z-index: 1024;
    cursor: pointer;
    display: inline-block;
    transform: scale(1.25,1.25);
    scroll-behavior: smooth;
    touch-action: manipulation;
    box-shadow: inset 0 0px 0px rgba(0,0,0,0.125);
    text-shadow: 0 -1px 0 rgba(0,0,0,0.3);
    line-height: 50px;
    font-size: 22px;
}