//  http://campus.codeschool.com/courses/cracking-the-case-with-flexbox/level/1/section/1/starting-a-grid

.grid {
  display: flex;
  margin: 20px 0;
}

.demo .grid-item {
  background: #ffffff;
  border: 1px solid #e5e5e5;
  padding: 10px;
  text-align: center;
}