@media screen and (min-width: 640px) {
content {
float:left;
width:100%;
}
side {
float:right;
width:30%;
}
blok {
clear: both;
display: block;
}
}
@media screen and (max-width: 640px) {
content {
display:block;
}
side {
display:none;
}
}