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              <div class="outer-container vertical-center">
  <p><strong>@include center(vertical);</strong><br>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros.</p>
</div><!-- /ui-block -->

<div class="no-flexbox">
  <div class="outer-container vertical-center">
    <div class="inner-container">
      <p><strong>@include center(vertical);</strong><br>NO FLEXBOX. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><!--Content with an unknown height -->
    </div><!-- /ui-block-inner -->
  </div><!-- /ui-block -->
</div>

<div class="outer-container center">
  <div class="inner-container">
    <p><strong>@include center(both);</strong><br>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><!--Content with an unknown height -->
  </div><!-- /ui-block-inner -->
</div><!-- /ui-block -->

<div class="no-flexbox">
  <div class="outer-container center">
    <div class="inner-container">
      <p><strong>@include center(both);</strong><br>NO FLEXBOX. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><!--Content with an unknown height -->
    </div><!-- /ui-block-inner -->
  </div><!-- /ui-block -->
</div>

<div class="outer-container absolute-center">
  <div class="inner-container">
    <p><strong>@include center(absolute, both);</strong><br>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><!--Content with an unknown height -->
  </div><!-- /ui-block-inner -->
</div><!-- /ui-block -->

<div class="outer-container absolute-center-vertical">
  <div class="inner-container">
    <p><strong>@include center(absolute, vertical);</strong><br>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><!--Content with an unknown height -->
  </div><!-- /ui-block-inner -->
</div><!-- /ui-block -->

<div class="outer-container absolute-center-horizontal">
  <div class="inner-container">
    <p><strong>@include center(absolute, horizontal);</strong><br>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec odio. Quisque volutpat mattis eros. Nullam malesuada erat ut turpis. Suspendisse urna nibh, viverra non, semper suscipit, posuere a, pede.</p><!--Content with an unknown height -->
  </div><!-- /ui-block-inner -->
</div><!-- /ui-block -->

<div class="no-flexbox no-csstransforms">
  <div class="outer-container absolute-center-legacy">
    <div class="inner-container">
      <p><strong>@include center(both);</strong><br>NO FLEXBOX OR CSS TRANSFORMS. If you go into inspector and shut off all flexbox and transforms, you'll see this work.</p><!--Content with an unknown height -->
    </div><!-- /ui-block-inner -->
  </div><!-- /ui-block -->
</div>

<div class="no-flexbox no-csstransforms">
  <div class="outer-container center">
    <div class="inner-container">
      <p><strong>@include center(both);</strong><br>NO FLEXBOX OR CSS TRANSFORMS. If you go into inspector and shut off all flexbox and transforms, you'll see this work.</p><!--Content with an unknown height -->
    </div><!-- /ui-block-inner -->
  </div><!-- /ui-block -->
</div>
            
          
!
            
              $support-ie7: false;
$support-ie8: true;
$ie-conditional-classes: true;

// Absolute Center
//-------------------------------
@mixin center($axis: both, $method: flex, $dimensions: null) {
  
  @if $method == flex {
    @include center-flex($axis);
  }
  
  @else if $method == absolute {
    @include center-absolute($axis);
  }
  
  @if $dimensions != null {
    @include center-absolute-legacy($dimensions); 
  }
}

@mixin center-absolute($axis) {
  position: relative;
  > * {
    position: absolute;
    @if ($axis == "both") {
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      
        .no-csstransforms & {
        > * {
          top: auto;
          left: auto;
        }
      }
    } @else if ($axis == "horizontal") {
      left: 50%;
      transform: translate(-50%, 0);
      
        .no-csstransforms & {
        > * {
          display: block;
          margin-left: auto;
          margin-right: auto;
        }
      }
    } @else if ($axis == "vertical") {
      top: 50%;
      transform: translate(0, -50%);
      
      .no-csstransforms & {
        display: table;
        > * {
          display: table-cell;
          top: auto;
          vertical-align: middle;
        }
      }
    }
  }
}

@mixin center-flex($axis) {
  display: flex;
  @if $axis == horizontal {
    justify-content: center;
    //TODO: flexboxlegacy support
    .no-flexbox &, .no-flexbox-legacy & {
      > * {
        display: block;
        margin-left: auto;
        margin-right: auto;
      }
    }
  } @else if $axis == vertical {
    align-items: center;
    .no-flexbox & {
      display: table;
      > * {
        display: table-cell;
        top: auto;
        vertical-align: middle;
      }
    }
  } @else if $axis == both {
    justify-content: center;
    align-items: center;
    .no-flexbox & {
      position: relative;
      > * {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
      }
    }
    .no-flexbox.no-csstransforms & {
      > * {
        position: relative;
        top: auto;
        left: auto;
        margin-left: auto;
        margin-right: auto;
      }
    }
  }
} // center-flex

@mixin center-absolute-legacy($dimensions) {
  // If only one value is supplied,
  // default to center the width
  @if length($dimensions) == 1 {
    $dimensions: $dimensions n;
  }

  $width: nth($dimensions, 1);
  $height: nth($dimensions, 2);
  
  .no-flexbox.no-csstransforms & {
    position: relative;
    > * {
      position: absolute;

      @if $width != n {
        @if not(unitless($width)) {
          width: $width;
          margin-left: (-$width / 2);
        }
        @if unitless($width) {
          width: $width + px;
          margin-left: (-$width / 2) + px;
        }
        left: 50%;
      }

      @if $height != n {
        @if not(unitless($height)) {
          height: $height;
          margin-top: (-$height / 2);
        }
        @if unitless($height) {
          height: $height + px;
          margin-top: (-$height / 2) + px;
        }
        top: 50%;
      }
    }
  }
} // absolute-center-legacy





// apply the mixin
.vertical-center {
  @include center(vertical);
}

// apply the mixin
.center {
  @include center();
  .inner-container {
    background-color: lighten(#bada55, 10%);
    width: 75%;
  }
}

.absolute-center {
  @include center(both, absolute);
}

.absolute-center-vertical {
  @include center(vertical, absolute);
}

.absolute-center-horizontal {
  @include center(horizontal, absolute);
}

.absolute-center-legacy {
  @include center(both, flex, 200px 200px);
  background-color: lighten(#bada55, 10%);
}





// Demo it
//-------------------------------

// just some style for the demo
.outer-container {
  float: left;
  width: 24%;
  min-height: 300px;
  padding: 10px;
  border: 10px solid #ffffff;
  background-color: #bada55;
}

// a little resetting
html,
body {
  height: 100%;
  margin: 20px;
}
*,
*:before,
*:after {
	box-sizing: border-box;
}
p {
  margin: 0;
}

            
          
!
999px
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