@mixin overflow_left_container {
  @include clearfix;
  & > :first-child {
    float: right;
    & + * {
      overflow: hidden;
    }
  }
}
@mixin overflow_right_container {
  @include clearfix;
  & > :first-child {
    float: left;

    & + * {
      overflow: hidden;
    }
  }
}