body {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  }

.galerie {
  display: flex;
  justify-content: left;
  flex-wrap: wrap;
  width: 90%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

h1 {
  text-align: center;
  color: green;
}

.item {
  width: 200px;
  height: 200px;
  overflow: hidden;
  flex-shrink: 0;
  }

.item img {
  width: 100%;
  height: 100%;  
  border-width: 1px;
  border-style:solid;
  border-color:white;
  }

  .sepia img {
    -webkit-filter: sepia(100%);
    filter: sepia(100%);
    -webkit-transition: .3s ease-in-out;
    transition: .3s ease-in-out;
  }
  .sepia :hover img {
    -webkit-filter: sepia(0);
    filter: sepia(0);
  }

  .zoom img {
    -webkit-transform: scale(1);
    transform: scale(1);
    -webkit-transition: .3s ease-in-out;
    transition: .3s ease-in-out;}

    .zoom :hover img {
      -webkit-transform: scale(1.3);
      transform: scale(1.3);
    }