Columns with equal height using Flexbox

columns.css

@import url(http://fonts.googleapis.com/css?family=Open+Sans);
html {
  background: #444;
  box-sizing: border-box;
  font-family: "Open Sans", sans-serif;
  line-height: 1.4;
}
*, *:before, *:after {
  box-sizing: inherit;
}
body {
  margin: 0;
}
/* before */
/* columns height based on content */
.columns {
  font-size: 0;
  list-style: none;
  margin-left: auto;
  margin-right: auto;
  max-width: 1280px;
  max-width: 80rem;
  overflow: hidden;
  padding: 8px;
  padding: 0.5rem;
}
.column {
  display: inline-block;
  font-size: 16px;
  font-size: 1rem;
  padding: 8px;
  padding: 0.5rem;
  vertical-align: top;
  width: 50%;
}
@media (min-width: 30em) {
  .column {
    width: 33.33333333%;
  };
}
@media (min-width: 48em) {
  .column {
    width: 16.66666666%;
  };
}
.tile {
  background: #fff;
  border: 3px solid #222;
  color: #444;
  padding: 16px;
  padding: 1rem;
}
.tile-main,
.tile-footer {
  margin: 0;
}
.tile-main {
  font-size: 18px;
  font-size: 1.125rem;
  margin-bottom: 4px;
  margin-bottom: 0.25rem;
}
.tile-footer {
  color: #aaa;
}
/* after */
/* Flexbox to the rescue */
.columns, .column, .tile {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}
.columns {
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}
.column, .tile {
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
}
.tile, .tile-main {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
  -ms-flex: 1;
  flex: 1;
}

index.htm

<ul class="columns">
  <li class="column">
    <div class="tile">
      <p class="tile-main">The Man in the High Castle</p>
      <p class="tile-footer"><time>1962</time></p>
    </div>
  </li>
  <li class="column">
    <div class="tile">
      <p class="tile-main">Martian Time-Slip</p>
      <p class="tile-footer"><time>1964</time></p>
    </div>
  </li>
  <li class="column">
    <div class="tile">
      <p class="tile-main">Do An&shy;droids Dream of Electric Sheep?</p>
      <p class="tile-footer"><time>1968</time></p>
    </div>
  </li>
  <li class="column">
    <div class="tile">
      <p class="tile-main">Ubik</p>
      <p class="tile-footer"><time>1969</time></p>
    </div>
  </li>
  <li class="column">
    <div class="tile">
      <p class="tile-main">Flow My Tears, the Police&shy;man Said</p>
      <p class="tile-footer"><time>1974</time></p>
    </div>
  </li>
  <li class="column">
    <div class="tile">
      <p class="tile-main">A Scanner Darkly</p>
      <p class="tile-footer"><time>1977</time></p>
    </div>
  </li>
</ul>