blog/assets/sass/_common/_utils.scss

@mixin clearfix() {
  &:before,
  &:after {
    content: " ";
    display: table;
  }
  
  &:after {
    clear: both;
  }
}

@mixin min-screen($min-width: $global-body-width) {
   @media screen and (min-width: $min-width) {
     @content;
   }
}

@mixin max-screen($max-width: $global-body-width) {
   @media screen and (max-width: $max-width) {
     @content;
   }
}