.sidebar {
width: 22em;
float: right;
clear: right;
margin: 0.5em 0 1em 1em;
font-size: 88%;
}
@media (max-width: 640px) {
.sidebar {
width: 100% !important;
clear: both;
float: none !important;
margin-left: 0 !important;
margin-right: 0 !important;
}
.sidebar.nomobile {
display: none;
}
}