.auth-container { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.auth-card {
  width: 100%; max-width: 400px;
  background: rgba(15,23,42,0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.08);
  border-top: 2px solid var(--brand-cyan);
  border-radius: 1rem;
  box-shadow: 0 24px 64px rgba(0,0,0,0.55), 0 0 40px rgba(11,198,234,0.05);
  padding: 2rem;
}
.auth-card h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-main); }
.auth-card .subtitle { color: var(--text-muted); margin-bottom: 2rem; }
.auth-hint { font-size: 0.75rem; color: var(--text-dim); margin-top: 1.5rem; }
.divider { position: relative; margin: 1.5rem 0; }
.divider::before { content: ''; position: absolute; top: 50%; left: 0; right: 0; border-top: 1px solid rgba(255,255,255,0.08); }
.divider span { position: relative; background: rgba(15,23,42,0.88); padding: 0 0.75rem; font-size: 0.875rem; color: var(--text-dim); }