.smoothscroll-top {
    position: fixed;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    text-align: center;
    z-index: 99;
    background-color: #ccc;
    color: #fff;
    width: 44px;
    height: 44px;
    line-height: 44px;
    right: 25px;
    bottom: -25px;
    padding-top: 2px;
    border-radius: 5px;
    transition: all .2s ease-in-out;
    transition-delay: 0;
}

    .smoothscroll-top:hover {
        background-color: #aaa;
        color: #fff;
        transition: all .2s ease-in-out;
        transition-delay: 0;
    }

    .smoothscroll-top.show {
        visibility: visible;
        cursor: pointer;
        opacity: 1;
        bottom: 10px;
        border-radius: 50rem;
    }

    .smoothscroll-top i.fa {
        line-height: inherit;
    }