*,
*:after,
*:before {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -ms-box-sizing: border-box;
    -o-box-sizing: border-box;
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

.clearfix:after {
    content: "";
    display: table;
    clear: both;
}