Utility Classes

.u {

    &-clearfix {
        content: " ";
        display: table;
    }

    &-full-width {
        width: 100%;
        box-sizing: border-box;
    }

    &-max-full-width {
        max-width: 100%;
        box-sizing: border-box;
    }

    &-pull-right {
        float: right;
    }

    &-pull-left {
        float: left;
    }

    &-hidden {
        display: none;
    }
}