#go-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
}

#go-container a {
    position: relative;
    display: block;
    width: 70px;
    height: 70px;
    background-color: #3f9800;
    color: #fff;
    text-align: center;
    font-weight: bold;
    font-size: 36px;
    line-height: 70px;
    border-radius: 50%;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 10px 10px -5px rgba(0, 0, 0, 0.7);
    bottom: 0;
    transition: bottom ease 0.3s;
}

#go-container:hover a {
    bottom: 5px;
}