.btn.btn-primary {
    background-color: #E16E51;
    border-color: #E16E51;
    color: #fff;
    transition: all .3s ease;
}

select {
  height: 38px!important;
}

.auth-info {
  background: #DDDDDD;
  border-bottom: 4px solid #934D97;
  padding: 10px;
  margin: 0;          /* plus de centrage */
  width: 100%;        /* prend la largeur du conteneur */
  max-width: none;    /* enlève la limite */
  text-align: center;
}

.auth-info h2 {
  margin-top: 0;
  font-size: 1.7rem;
}