.photo {

  margin: 0 auto;


  /* état initial : noir et blanc */
  filter: grayscale(1) contrast(1.1) brightness(1.1);
  transition: filter 0.2s linear;
}

.photo_2 {

  margin: 0 auto;


  /* état initial : noir et blanc */
  filter: grayscale(1) contrast(1.1) brightness(1.1);
  transition: filter 0.2s linear;
	border-radius: 5px;
}