CSS Technique: Block container demo code

containers.html

<div class="box">
  <span class="t box-inner">div + span</span>
</div>

style.css

.box {
  background: #eee;
  border-radius: 4px;
  padding: 5px;
  white-space: nowrap;
}

.box-inner {
  display: inline-block;
  background: #eee;
  border-radius: 4px;
  margin: -5px;
  padding: 5px;
}