body {
  background-color: white;
  background-size: cover;
  background-repeat: no-repeat;
  background-image:url(../images/fond.jpg);
}

.mainbox {
  width: 50%;
  position: absolute;
  left: 50%;
  top: 50%;
}

  .err {
    color: #ffffff;
    font-family: 'Marianne';
    font-size: 11rem;
    position:absolute;
    left: 20%;
    top: 8%;
  }

.far {
  position: absolute;
  font-size: 8.5rem;
  left: 42%;
  top: 15%;
  color: #ffffff;
}

 .err2 {
    color: #ffffff;
    font-family: 'Marianne';
    font-size: 11rem;
    position:absolute;
    left: 68%;
    top: 8%;
  }

.msg {
    text-align: center;
    font-family: 'Marianne';
    font-size: 1.6rem;
    position:absolute;
    left: 16%;
    top: 45%;
    width: 75%;
  }

a {
  text-decoration: none;
  color: 1a2e83;
}

a:hover {
  text-decoration: underline;
}