// see http://jsfiddle.net/stefanreich/a1uLzqh2/4/
srecord HLeftCenterRight(S left, S center, S right) {
  S headStuff() {
    ret hcss([[
      .util-lcr {
        text-align: center;
        /*margin: 0 auto;*/
        width: 100vw;
        position: relative;
      }
  
      .util-lcr-left, .util-lcr-right {
        position: absolute;
        top: 0;
        height: 100%;
      }
      
      .util-lcr-left {
        left: 0;
        transform: translateX(-100%)
      }
  
      .util-lcr-center {
        position: relative;
        display: inline-block;
        height: 100%;
        z-index: 2;
      }
      
      .util-lcr-right {
        right: 0;
        transform: translateX(100%)
      }
    ]];
  }
  
  S get() {
    ret div_class(".util-lcr",
      linesLL(
        unnull(center),
        div_class(".util-lcr-left", left),
        div_class(".util-lcr-right", right)));
  }
}