body.auth { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px; }
.auth-card {
  width: 100%; max-width: 380px; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
}
.auth-card h1 { text-align: center; margin-bottom: 16px; }
.auth-card form { display: grid; gap: 14px; }
.flash { background: #3b1414; color: var(--danger); padding: 10px 12px; border-radius: 10px; margin: 0 0 12px; font-size: .9rem; }
.alt { text-align: center; color: var(--muted); font-size: .9rem; margin: 16px 0 0; }
small { color: var(--muted); }