body {
  padding: 50px;
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}

a {
  color: #00B7FF;
}

#posts_box{
  display: flex;
  flex-wrap: wrap;
}

.post{
  width:300px;
  margin:5px;
  border: solid 1px;
}

.post .username {
  font-weight: bold;
  color: #007bff;
  margin: 5px 10px;
  font-size: 12px;
}

.post .description {
  margin: 5px 10px;
  color: #333;
}