@mixin font-size($size)
html
font-size: $size
@media (max-width: 480px)
@include font-size(12px)
@media (min-width: 480px)
@include font-size(13px)
@media (min-width: 786px)
@include font-size(14px)
@media (min-width: 992px)
@include font-size(15px)
@media (min-width: 1200px)
@include font-size(16px)