body > section {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
}
article {
  box-shadow: 1px 2px 2px rgba(250, 234, 234, 0.2), 2px 2px 2px rgba(0, 0, 0, 0.2);
  border: solid 1px #eee;
  background-color: white;
  margin: 1em;
  padding: 1em;
  min-width: 300px;
  max-width: 600px;
  flex-basis: 450px;
}