.logo {
  text-align: center; 
  margin-top: -10px;
}

.accroche {
  text-align: center; 
  margin-top: 50px;
}

.btn {
  text-align: center;
  margin-top: 100px;
}

 
 .bg { 
  background-color: #FFFFFF;
  background-repeat: no-repeat;

  background-position: top;
  background-position-x: center;
  background-image: url("../images/fond-page-sandaya-vertical.jpg");
}