body {
  color: #666;
  text-align: center;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  margin: auto;
  font-size: 14px;
  background-color: #F1F1F1;
}

h1 {
  font-size: 56px;
  line-height: 100px;
  font-weight: normal;
  color: #456;
}

h2 {
  font-size: 24px;
  color: #666;
  line-height: 1.5em;
}

h3 {
  color: #456;
  font-size: 20px;
  font-weight: normal;
  line-height: 28px;
}

hr {
  max-width: 800px;
  margin: 18px auto;
  border: 0;
  border-top: 1px solid #EEE;
  border-bottom: 1px solid grey;
}

.couleur {
  color: #3267BF;
}

img {
  max-width: 40vw;
  margin: 20px;
}