body {
  background-image: url('/assets/img/chart.jpg');
  background-size: cover;
}

#login-container, #register-container {
  width: 500px;
  margin: 10% auto;
  text-align: center;
  border-radius: 8px;
  padding:20px;
  display: none;
}

.div-login, .div-register {
  text-align: center;
  margin: 0 auto;
}