body {
  background-color: #f5f5f5;
}

.form-signin {
  max-width: 360px;
  padding: 2rem;
  margin: 100px auto;
  background: #fff;
  border-radius: 0.5rem;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.form-signin .form-signin-heading {
  margin-bottom: 1.5rem;
  text-align: center;
}