@mixin prefixer ($property, $value){
    -webkit-#{$property}: $value;
    -moz-#{$property}: $value;
    -o-#{$property}: $value;
    #{$property}: $value;
}

@mixin clearfix {
    &:after {
      content: "";
      display: table;
      clear: both;
    }
  }

  @mixin relative {
    position: relative;
    width: 100%;
    height: 100%;
  }