.auth-page { display: grid; place-items: center; }
.auth-panel, .portal-panel {
  width: min(420px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
  animation: rise 0.45s var(--ease) both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
.auth-panel h1 { margin: 0 0 0.35rem; font-size: 1.8rem; }
.auth-sub { color: var(--muted); margin: 0 0 1.25rem; }
.auth-form .btn { width: 100%; margin-top: 1.25rem; }