.two-column-section {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  width: calc(100% + 2em);
  margin-right: -1em;
  margin-left: -1em;
}

.section {
  -webkit-box-flex: 1;
  -ms-flex: 1 0 calc(50% - 2em);
  flex: 1 0 calc(50% - 2em);
  margin-right: 1em;
  margin-left: 1em;
  -ms-flex-positive: 1;
  -ms-flex-negative: 0;
  -ms-flex-preferred-size: calc(50% - 2em);
}