/* Conteneur principal */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
}

.column {
  display: flex;
  flex-direction: column;
  width: 100%;
  align-items: stretch;
  margin-top:10px;
}

.photo {
width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  cursor: pointer;
}
.photo-wrapper {
  padding: 10px;          /* contour blanc */
  background: white;
  box-sizing: border-box;
}

.gallery > .column:first-child .photo-wrapper{
	padding:10px 10px 10px 20px;
}