.column {
  display: none; /* Hide all elements by default */
}

/* Clear floats after rows */ 
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* The "show" class is added to the filtered elements */
.show {
  display: block;
}

.btn.selected {
  background-color: #B3D89C;
  color: white;
}