@import url('md/main.css') screen and (min-width: 1200px);
@import url('md/main.css') screen and (min-width: 992px) and (max-width: 1200px);
@import url('md/main.css') screen and (min-width: 768px) and (max-width: 992px);
@import url('sm/main.css') screen and (min-width: 576px) and (max-width: 768px);
@import url('xs/main.css') screen and (max-width: 576px);