#wrapper {
    width: 640px;
}

#all-content {
    width: 100%;
}

#main-content {
    width: 100%;
    display: block;
    margin: 0 auto;
    overflow: auto;
}

#secondary-content {
    width: 100%;
    display: block;
    margin: 0 auto;
    overflow: auto;
}