.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  position: relative;
  overflow: hidden;
}

.auth-screen::before {
  content: '';
  position: absolute;
  inset: -20%;
  background: var(--gradient-ambient);
  animation: ambient-drift 18s ease-in-out infinite alternate;
  z-index: 0;
}

@keyframes ambient-drift {
  from { transform: translate(-2%, -1%) scale(1); }
  to { transform: translate(2%, 2%) scale(1.06); }
}

.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  padding: var(--space-6);
  animation: card-rise var(--duration-slow) var(--ease-out);
}

@keyframes card-rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.auth-title { margin-bottom: var(--space-1); }
.auth-subtitle { color: var(--color-muted); font-size: var(--text-sm); margin-bottom: var(--space-5); }

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-faint);
  font-size: var(--text-xs);
  margin: var(--space-5) 0;
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.oauth-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
}

.oauth-btn {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
}

.auth-footer-link {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-top: var(--space-5);
}
.auth-footer-link a { color: var(--color-signal-strong); font-weight: 600; }

.two-factor-hint {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-faint);
  margin-bottom: var(--space-4);
}