.burger {
    height: 3em;
    width: 3em;
    position: relative;
    font-size: 12px;
    cursor: pointer;
    -webkit-transition: .2s all;
    -o-transition: .2s all;
    transition: .2s all;
    -webkit-tap-highlight-color: transparent; }
    .burger .burger-lines:after {
      left: 0;
      top: -1em; }
    .burger .burger-lines:before {
      left: 1em;
      top: 1em; }
    .burger:after {
      content: '';
      display: block;
      position: absolute;
      height: 150%;
      width: 150%;
      top: -25%;
      left: -25%; }
    .burger .burger-lines {
      top: 50%;
      margin-top: -0.125em; }
      .burger .burger-lines, .burger .burger-lines:after, .burger .burger-lines:before {
        pointer-events: none;
        display: block;
        content: '';
        width: 100%;
        border-radius: 0.25em;
        background-color: white;
        height: 0.25em;
        position: absolute;
        -webkit-transform: rotate(0);
            -ms-transform: rotate(0);
                transform: rotate(0); }
      .burger .burger-lines:after {
        left: 0;
        top: -1em; }
      .burger .burger-lines:before {
        left: 1em;
        top: 1em; }
  .burger.burger-squeeze .burger-lines, .burger.burger-squeeze .burger-lines:after, .burger.burger-squeeze .burger-lines:before {
    -webkit-transition: .2s top .2s, .1s left, .2s transform, .4s background-color .2s;
    -o-transition: .2s top .2s, .1s left, .2s transform, .4s background-color .2s;
    transition: .2s top .2s, .1s left, .2s transform, .4s background-color .2s; }
  
  .burger.burger-squeeze .burger-lines:after, .burger.burger-squeeze .burger-lines:before {
    width: 2em; }
  
  .burger.burger-squeeze.open .burger-lines, .burger.burger-squeeze.open .burger-lines:after, .burger.burger-squeeze.open .burger-lines:before {
    -webkit-transition: .2s background-color, .2s top, .2s left, .2s transform .15s;
    -o-transition: .2s background-color, .2s top, .2s left, .2s transform .15s;
    transition: .2s background-color, .2s top, .2s left, .2s transform .15s; }
  
  .burger.burger-squeeze.open .burger-lines {
    background-color: transparent; }
  
  .burger.burger-squeeze.open .burger-lines:before, .burger.burger-squeeze.open .burger-lines:after {
    left: 0.5em;
    top: 0px; }
  
  .burger.burger-squeeze.open .burger-lines:before {
    -webkit-transform: rotate(-45deg);
        -ms-transform: rotate(-45deg);
            transform: rotate(-45deg); }
  
  .burger.burger-squeeze.open .burger-lines:after {
    -webkit-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
            transform: rotate(45deg); }