.mt{
  margin-top: 2em;
}
.post_content{
  text-align: center;
  width: 100%;
}
.post_content a{
  color: #03c4eb;
}
.post_content a:hover{
  text-decoration: underline;
}

.photo_flex{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
.photo_flex a {
  margin: 0.5em;
  width: 18%;
}

@media only screen and (min-width: 1024px) {
  .photo_flex a {
    width: 14%;
  }
}