/**
 * login.css — Login screen styles.
 * Only visible before authentication. Hidden after App.init().
 */
.login-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.login-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  width: 340px;
  box-shadow: var(--sh2);
}
.login-brand {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 24px;
}
.login-brand i { margin-right: 8px; }
.login-error {
  color: var(--danger);
  font-size: 0.82rem;
  margin-bottom: 8px;
  display: none;
}