figureslibres.cc/user/themes/figureslibres/css-compiled/scss/theme/_item.scss

#item{
  .e-content{
    -webkit-columns: 300px 2;
    -moz-columns: 300px 2;
        columns: 300px 2;
    margin-bottom: $marg;
    }
  .card-image{
    img:not(:last-of-type){
      margin-bottom: $marg;
    }
  }
}

.other_projets{
  border-top: 1px solid black;
  display: flex;
  flex-wrap: wrap;
  margin-top: $margI;
  margin-bottom: $margI;
  h3{
    margin: 1rem 0 $marg 0;
    width: 100%;
  }
  .card{
    width: $Wi33;
    &:nth-child(-1n+3){
      margin-right: $marg;
    }
    .card-header{
      display: flex;
      flex-wrap: wrap;
      & > *{
        margin-right: $marg;
      }
    }
  }
}