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<!DOCTYPE html>
<title>CSS Box Alignment: align-content block fragmentation: simple content</title>
<style title="Needed for automation; delete to review/debug">
  @import "/fonts/ahem.css";
  html { font: 10px/1 Ahem; max-width: 780px; }
</style>
<style>
  .pager {
    column-fill: auto;
    column-width: 15em;
    height: 5em;
  }
  .test {
    height: 19em;
    /* show bounds of test box without interfering with margin-collapsing */
    border-inline: solid black 1em;
  }
  .large, .float {
    height: 2.5em;
    break-inside: avoid;
    padding: 2px; /* using padding because of margin handling bugs
    margin: 2px;
switch back once fixed */
    background: orange;
  }
  .float {
    float: right;
  }
  .nobr {
    break-inside: avoid;
  }
  /* readability */
  .pager { border: solid 2px gray; margin: 0.5em 0; }
  .test  { color: #8888; text-align: center; }
  .label { color: black; font-weight: bold; }
  .test .large { margin-top: 0; } /* margins truncated by unforced breaks */
</style>
<!--
   This test creates breaks:
     * after some directly-contained text
     * after a fixed-height block
     * through some nested text
     * after a block containing text
-->
<div class="pager">
  <div class="test">
      <span class="label">CENTER</span><br>LINE 2<br>LINE 3
      <div class="large"></div>
      <div class="large"></div>
      <div>
        LINE 4
        <div class="nobr">LINE 5<br>LINE 6</div>
      </div>
    </div>
  </div>
</div>
<div class="pager">
  <div class="test">
      <span class="label">END</span><br>LINE 2<br>LINE 3
      <div class="large"></div>
      <div class="large"></div>
      <div>
        LINE 4
        <div class="nobr">LINE 5<br>LINE 6</div>
      </div>
    </div>
  </div>
</div>
<div class="pager">
  <div class="test">
      <span class="label">BASELINE</span><br>LINE 2<br>LINE 3
      <div class="large"></div>
      <div class="large"></div>
      <div>
        LINE 4
        <div class="nobr">LINE 5<br>LINE 6</div>
      </div>
    </div>
  </div>
</div>
<div class="pager">
  <div class="test">
      <span class="label">LAST BASELINE</span><br>LINE 2<br>LINE 3
      <div class="large"></div>
      <div class="large"></div>
      <div>
        LINE 4
        <div class="nobr">LINE 5<br>LINE 6</div>
      </div>
    </div>
  </div>
</div>
<div class="pager">
  <div class="test">
      <span class="label">UNSAFE CENTER</span><br>LINE 2<br>LINE 3
      <div class="large"></div>
      <div class="large"></div>
      <div>
        LINE 4
        <div class="nobr">LINE 5<br>LINE 6</div>
      </div>
    </div>
  </div>
</div>
<div class="pager">
  <div class="test">
      <span class="label">UNSAFE END</span><br>LINE 2<br>LINE 3
      <div class="large"></div>
      <div class="large"></div>
      <div>
        LINE 4
        <div class="nobr">LINE 5<br>LINE 6</div>
      </div>
    </div>
  </div>
</div>