Header

Main

.main {
    float: left;
    width: 100%;
}
.main-wrap {
    margin: 0 230px 0 190px;
}

Sub

.sub {
    float: left;
    width: 190px;
    margin-left: -100%;
}

Extra

.extra {
    float: left;
    width: 230px;
    margin-left: -230px;
}

Footer