.text-block {
    width: 250px;
    margin: 50px;
}

#go-top {
    z-index: 1000;
    position: fixed; 
    font-family: sans-serif;
    line-height: 66px;
    text-align: center;
    color: #fff;
    bottom: 50px; 
    right: 10px; 
    cursor:pointer; 
    display:none;
    width: 76px;
    height: 76px;
    padding: 10px;
    background: transparent;
}
#go-top img {
    margin: auto;
    display: block;
    width: auto;
    height: auto;
    max-width: 66px;
    max-height: 66px;
}
#go-top:hover img {
    border-radius: 66px;
    -webkit-box-shadow: 0px 0px 5px 5px rgba(50, 111, 176, 0.2);
    -moz-box-shadow:    0px 0px 5px 5px rgba(50, 111, 176, 0.2);
    box-shadow:         0px 0px 5px 5px rgba(50, 111, 176, 0.2);
}