/* Éléments en général */
body {
  font: bold 400% "Times New Roman", Times, serif;
  background: url(rayure.jpg) repeat fixed;
  padding: 0;
  margin: 0;
}
h1 {
  font-size: 5ex;
  text-align: center;
  background: url(cercle.jpg) no-repeat center center;
  width: 90%;
  height: 512px;
  padding: 0;
  margin: 0.25em auto;
}
p {
  font-size: 2.5ex;
  text-decoration: underline overline;
  text-align: center;
  width: 60%;
  padding: 1em;
  margin: 0 auto;
  border: 40px double red;
}