* {
  margin: 0px;
  padding: 0px;
}

body {
  background: #ffffcc none repeat scroll 0% 0%;
  font-family: Verdana, Geneva, Tahoma, sans-serif
  font-size= 2em;
  margin: 10px 20px 10px 20px;
  display: flex; /* Utilise Flexbox pour empiler header, main-container, footer */
  flex-direction: column; /* Empile les éléments verticalement */
  line-height: 20px;
  color: black;
  margin: 20px;
  text-align: center;
  
}

h {
  color: blue;
  text-align: center;
}