#conteneur
{
    display: flex;
    justify-content: space-between;
}
body
{
  background-color: silver;
  color: white;
  background-attachment: fixed;
}

.t1
{
  color: black;	
  border-style: solid;
  width: 400px;
}

.login
{
  color: black;
  background-color: gray;
  font-size: 1.5em;
  font-family: "Arial";
  font-style: normal;
  font-weight: none;
  text-align: center;
  text-decoration: none;
  border: 2px gray solid;
  border-radius: 10px;
  apacity: 0.3;
}

.im {

  display: flex;
  justify-content: center;

}