/* code from https://blog.logrocket.com/responsive-image-gallery-css-flexbox/ */

.image-gallery{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  width: 100%;
  padding: 20px;
}

.image-gallery > a{
  flex: 1 1 auto;
  height: 300px;
  position: relative;
  cursor: pointer;
 
}

.image-gallery img {
  object-fit: cover;
  width: 100%;
  height: 100%;
  vertical-align: middle;
  border-radius: 5px;
}

.image-gallery::after{
  content: "";
  flex-grow: 999;
}

/*Hover over code*/

.overlay{
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(57, 57, 57, 0.502);
  top: 0;
  left: 0;
  transition: all 0.2s 0.1s ease-in-out;
  color: #ffffff;
  border-radius: 5px;
  opacity: 0;

  /*centering overlay text*/
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-gallery a:hover .overlay{
  opacity: 1;
}