.login-screen {
  display: none;
  height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.login-screen.active { display: flex; }

.login-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  width: 100%;
  max-width: 380px;
  text-align: center;
}
.login-card h1 {
  font-size: 22px;
  color: var(--text-0);
  margin-bottom: 4px;
  letter-spacing: -0.5px;
}
.login-card .subtitle {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 28px;
}
.login-card form { display: flex; flex-direction: column; gap: 12px; }
.login-error {
  font-size: 13px;
  color: var(--red);
  margin-top: 4px;
}
.login-success {
  font-size: 13px;
  color: var(--text-1);
  margin-top: 4px;
  line-height: 1.45;
}