ul.categorytree, ul.categorytree ul {
 list-style-type: none;
 background: url(../images/vline.png) repeat-y;
 margin: 0;
 padding: 0;
}

ul.categorytree ul {
 margin-left: 10px;
}

ul.categorytree li {
 margin: 0;
 padding: 0 12px;
 line-height: 20px;
 background: url(../images/node.png) no-repeat;
 color: #369;
 font-weight: bold;
}

ul.categorytree li.lastcategory {
 background: #fff url(../images/lastnode.png) no-repeat;
} 

pre {
    display: block;
    font-family: monospace;
    white-space: pre-wrap;
    margin: 1em 0;
    overflow: auto;
}

#wideimage {
    display: block;
}
#smallimage {
    display: none;
}

#largeAds {
    width:468px;
    height: 60px;
    line-height: 60px;
    margin: 0 auto;
    text-align: center;
}
#smallAds{
    display: none;
    margin: 0 auto;
    width: 200px;
    height: 60px;
    line-height: 60px;
    color: #fff;
    text-align: center;
}

@media screen and (max-width: 600px) { 
    #largeAds { display: none }
    #smallAds { display: block; }
    ul.categorytree { display: none }
    #wideimage { display: none }
    #smallimage { display: block; }
}