div.abc {
    padding: 0.5em;
    margin: 0 0 0.5em 0;
    background-color: #fff;
    color: #000;
    border-top: 1px solid #ccc;
    border-right: 2px solid #aaa;
    border-bottom: 2px solid #aaa;
    border-left: 1px solid #ccc;
    text-align: center;
}
div.abc_src {
    display: none;
    padding: 0.5em;
    margin: 0 0 0.5em 0;
    border: none;
}
div.visible {
    display: block !important;
    border: 1px solid #ccc;
}
div.abc ul {
    border-bottom: 1px dotted #ccc;
    text-align: left;
}
div.abc li {
    list-style: none;
}
/* if you allow midi files per mime(.local).conf, you should comment the follow lines out
a.mf_mid {
    background-image: url(mid.png);
}
 */