* {
  box-sizing: border-box;
}

.row_image {
  display: -ms-flexbox; /* IE10 */
  display: flex;
  -ms-flex-wrap: wrap; /* IE10 */
  flex-wrap: wrap;
  padding: 0 4px;
 }

/* Create four equal column_images that sits next to each other */
.column_image {
  -ms-flex: 25%; /* IE10 */
  flex: 25%;
  max-width: 25%;
  padding: 0 4px;
}

.column_image img {
  margin-top: 8px;
  vertical-align: middle;
  width: 100%;

}

.camp {
  margin-top: 8px;
  vertical-align: middle;
  width: 100%;
  background-repeat: no-repeat;
  background-color: red;
  background-image: url("images/campus/w3.html");
}

/* Responsive layout - makes a two column_image-layout instead of four column_images */
@media screen and (max-width: 800px) {
  .column_image {
    -ms-flex: 50%;
    flex: 50%;
    max-width: 50%;
  }
}

/* Responsive layout - makes the two column_images stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
  .column_image {
    -ms-flex: 25%;
    flex: 25%;
    max-width: 100%;
  }
}