#picked-atom-name {
    text-align: center;
    font-family: sans-serif;
    height: 18px;
}

#pv_viewer {
    border: 1px solid gray;
}

#msa_viewer {
    
}

#viewer {
    
}

div.masked {
    position: relative;
}

div.masked:before {
    position:absolute;
    content: "";
    display:block;
    width: 100%;
    height: 100%;
    background-color: rgba(70, 70, 70, 0.4);
    background-image:url(loading.gif);
    background-position: center;
    background-repeat: no-repeat;
    z-index:1;
    color: #ff0;
}