<p>Hello, World!</p>
/* Define the container for the gallery */
.photo-gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  height: 100%;
  width: 100%;
}

/* Define the styles for each photo */
.photo-gallery .photo {
  flex-basis: 20%;
  height: 0;
  padding-bottom: 20%;
  background-size: cover;
  background-position: center;
  margin: 1%;
  transition: transform 0.5s ease-in-out;
}

/* Add hover effect to photos */
.photo-gallery .photo:hover {
  transform: scale(1.05);
  cursor: pointer;
}