.auth-shell {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.auth-card { width: 100%; max-width: 400px; }
.auth-card .nav-logo { text-align: center; margin-bottom: 28px; font-size: 20px; }
.auth-card h1 { font-size: 22px; text-align: center; margin-bottom: 6px; }
.auth-card p.sub { text-align: center; color: var(--ink-soft); font-size: 14px; margin-bottom: 28px; }
.auth-card .card { padding: 32px; }
.auth-switch { text-align: center; margin-top: 20px; font-size: 14px; color: var(--ink-soft); }
.auth-switch a { color: var(--brass-dark); font-weight: 600; }