body.web-to-lead input {
   border-color:red;
}

body.customers_login {
  background: url('https://digitar.tactcrm.be/media/login-clients.jpg') no-repeat center center fixed; /* The full image url*/
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}