* {
  box-sizing: border-box; /* 1 */
}


@font-face {
    font-family: 'optima';
    src:url('font/optimabold.otf') format('opentype');
}


body {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;

  background-color: #DEDEDE;
  color: black;

  font-family: 'optima';
}

#affiche {
  overflow: hidden;
  position: relative;
  width: 64vh;
  height: 90vh;
  /* le ratio est celui d’une feuille A4 (format ISO) environ */
  background: #fff;
  box-shadow: 0 4px 8px 0px rgba(0,0,0,.22);
}

h1,h2,h3,h4 {
  font-family: inherit;
  font-weight: normal;
}

@media screen and (max-width: 768px) {
  #affiche {
  }
}
