@remuxFontsize: 14px;  // base font size
@remuxFallback: false; // switch to include px fallback

.remux(font-size, @value) {
  @processingRem: ((round((@value / @fontsize-base) * 10000000)) / 10000000);

  .result(@value, @fallback) when (@fallback = true) {
    font-size: ~"@{value}px";
    font-size: ~"@{processingRem}rem";
  }
  .result(@value, @fallback) when (@fallback = false) {
    font-size: ~"@{processingRem}rem";
  }

  .result(@value, @remuxFallback);
}

.remux(border, @value) {
  @processingRem: ~`(function() { var base = parseFloat("@{remuxFontsize}"); return "@{value}".replace(/[\[\]]/g, '').replace(/([0-9]*[.]{0,1}[0-9]*px)/gi, function() { return ((Math.round((parseFloat(arguments[0]) / base) * 10000000)) / 10000000) + 'rem'; }); }())`;

  .result(true) {
    border: @value;
    border: @processingRem;
  }
  .result(false) {
    border: @processingRem;
  }

  .result(@remuxFallback);
}