html, body {
  height: 100%;
  margin: 0;
}

body {
  background-color: black;
  color: white;
  font-family: "Jersey 15", sans-serif;
}

a {
color: white; 
text-decoration: none;
text-transform: uppercase;
font-size: 2rem;  
}

a:hover {
text-decoration: underline;
}

a:focus {
text-decoration: underline; 
}

.initialising {
  font-size: 2rem; 
  margin: 2rem; 
}

.nav {
text-align: right;
margin: 2rem; }

.portfolio {
position: relative;
}

.portfolio h2 {
margin: 2rem; 
}

.vertical {
width: 295px; 
}

.banner {
max-width: 600px;
}

iframe {
  max-width: 600px; 
}

.poem {
 margin-left: 1rem; 
 position: absolute; 
 top: 200px; 
}

.bottompart {
margin: 2rem; 
}

/* Tablette : largeur ≥ 600px */
@media (min-width: 600px) {
 .initialising {
    font-size: 4rem;
    letter-spacing: 1rem; 
  }

  .banner {
max-width: 100%;
}

  .vertical {
width: 49%;
}

iframe {max-width: 100%;}

  .poem {
top: 220px; }
  
  .bottompart {
    font-size: 1.2rem;
  }
}

/* Desktop : largeur ≥ 1024px */
@media (min-width: 1024px) {
  .initialising {
    font-size: 6rem;
    letter-spacing: 1.5rem; 
  } 
}

@media (min-width: 1920px) {
}

.dots::after {
  content: '.';
  display: inline-block;
  width: 1.5em;
  text-align: left;
  animation: dots-appear 3s steps(3, end) infinite;
}

@keyframes dots-appear {
  0%   { content: '.'; }
  40%  { content: '..'; }
  80% { content: '...'; }
}