CSS code snippet – How to style rule to apply the Border Box model ?
header, ul, nav, li, a /* other elements */{ display: block; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box;
header, ul, nav, li, a /* other elements */{ display: block; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box;