/* (A) WHOLE PAGE */
html, body { font-family: arial, sans-serif; }

/* (B) LOGIN FORM */
#login-form {
  padding: 20px;
  background: #f2f2f2;
  max-width: 320px;
  margin: 0 auto;
}
#login-form h1 {
  font-size: 1.5em;
  margin: 0;
  color: #9b9b8d;
}
#login-form label, #login-form input {
  box-sizing: border-box;
  display: block;
  width: 100%;
  margin-top: 10px;
}
#login-form input { padding: 10px; }
#login-form input[type=submit] {
  background: #ad4343;
  color: #fff;
  border: 0;
  cursor: pointer;
}

/* (C) INVALID LOGIN */
#bad-login {
  padding : 10px;
  margin-bottom: 10px;
  background: #ffe7e7;
  border: 1px solid #ff3e3e;
  color: #c10000;
  font-weight: bold;
}