#logoconnect {
  height: 270px;
  display: block;
  margin: 0 auto;
  margin-top: 5%;
}

@media screen and (max-height: 650px) {
#logoconnect {
  height:160px;
}
}

#erreur {
  margin-top: 15%;
}

#form {
    margin-top:10px;
}