/* (A) WHOLE PAGE */
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
body {
  background: #f2f2f2;
}

/* (B) LOGIN FORM */
form {
  width: 400px;
  padding: 20px;
  margin: 0 auto;
  border: 1px solid #ccc;
  background: #fff;
}
form h1 {
  font-size: 28px;
  margin: 0 0 20px 0;
}
form label, form input {
  display: block;
  width: 100%;
}
form label {
  color: #7e7e7e;
  padding: 10px 0;
}
form input { padding: 10px; }
form input[type=submit] {
  margin-top: 20px;
  border: 0;
  font-weight: 700;
  color: #fff;
  background: #9D4AEF;
  cursor: pointer;
}

/* (C) ERROR */
.error {
  padding: 10px;
  margin-bottom: 20px;
  border: 1px solid #ff7979;
  background: #ffdada;