.abs-layout-site-two-column {
    float: none;
    width: 100%; 
}

.abs-layout-site-three-column {
    width: 100%;
    max-width: 1920px;
}

.abs-layout-site-three-column > .abs-layout-columns {
    width: 100%;
}

.abs-layout-site-three-column > .abs-row > .abs-col-content {
    float: left;
    width: 70%;
}

.abs-layout-site-three-column > .abs-row > .abs-col-left-sidebar {
    float: left;
    width: 15%;
}

.abs-layout-site-three-column > .abs-row > .abs-col-right-sidebar {
    float: right;
    width: 15%;
}