body {
  background-image: url("gal-images/grunge.jpg");
  background-repeat: repeat;
}

.row {
  display: flex;
  width:820px;
  flex-wrap: wrap;
}

/* Create two equal columns that sits next to each other */
.column {
  width:400px;
}

.column img {
  margin-top: 8px;
  vertical-align: middle;
  width:400px;
  height:auto;
}


.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
}

/* Style the buttons that are used to open the tab content */
.tab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
}

/* Change background color of buttons on hover */
.tab button:hover {
  background-color: #ddd;
}

/* Style the tab content */
.tabcontent {
  display: none;
  padding: 6px 12px;
  border: 1px solid #ccc;
  border-top: none;
}