#header {
    background: url(img/01-europa-bg.jpg) center center / cover no-repeat ;
  }
#footer {
    background: url(img/00-europa-bg.jpg) center center / cover no-repeat ;
  }
  
  body {
    padding: 2em;
  }
  .card {
    border: none;
  }
  img,
  .card-img-top {
    border-radius: 0em;
  }
  
  @media (min-width: 576px) {
    .card-columns {
      column-count: 2;
    }
  }
  
  @media (min-width: 768px) {
    .card-columns {
      column-count: 3;
    }
  }
  
  @media (min-width: 992px) {
    .card-columns {
      column-count: 4;
    }
  }
  
  @media (min-width: 1200px) {
    .card-columns {
      column-count: 5;
    }
  }