Yoko Child Theme style.css

/*
Theme Name: Yoko Child Theme
Author: Self-Help WordPress User
Template: yoko
*/

@import url("../yoko/style.css");

/* Start child theme CSS here */

#content {
        width: 100%;
        float: left;
        margin-right: 4%
}
#secondary {
        display: none;
}
#tertiary {
        width: 21%;
        float: right;
        overflow: hidden;
}