@mixin media( $res ) {
@if mobile == $res {
@media only screen and (min-width: $mobile_width) {
@content;
}
}
@if tablet == $res {
@media only screen and (min-width: $tablet_width) {
@content;
}
}
@if desktop == $res {
@media only screen and (min-width: $desktop_width) {
@content;
}
}
@if wide == $res {
@media only screen and (min-width: $wide_width) {
@content;
}
}
}
@mixin link-transition( $attr: color ) {
transition