// rem fallback - credits: http://zerosixthree.se/ @function calculateRem($size) { $remSize: $size / 16px; @return $remSize * 1rem; } @mixin font-size($size) { font-size: $size; font-size: calculateRem($size); } // antialiasing mode font rendering @mixin font-smoothing { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }