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@mixin cleanflex {
  &::after,
  &::before {
    content: "";
    display: table;
    -ms-flex-preferred-size: 0;
    flex-basis: 0;
    -webkit-box-ordinal-group: 2;
    -ms-flex-order: 1;
    order: 1;
  }
  &::after {
    clear: both;
  }
}