* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 600px;
  margin: 0 auto;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Oxygen, Cantarell, sans-serif;
  background-color: rgb(245, 245, 245);
}

#contenu h1 {
  margin: 2rem 0 1rem;
}

#contenu p {
  margin: 0 0 4rem;
}