.login-card { max-width: 480px; }
.login-card h1 { margin-bottom: 8px; }
.login-intro { margin-bottom: 28px; }
.login-switch { display: flex; gap: 4px; padding: 5px; background: var(--bg); border: 1px solid var(--rule); border-radius: 10px; margin-bottom: 24px; }
.login-switch a { flex: 1; display: flex; align-items: center; justify-content: center; gap: 9px; min-height: 46px; padding: 10px 12px; border-radius: 6px; color: var(--text-dim); text-decoration: none; font-size: 14px; transition: color .18s, background .18s; }
.login-switch a:hover { color: var(--text); }
.login-switch a.is-active { background: var(--amber); color: var(--bg); font-weight: 500; box-shadow: 0 2px 8px #0003; }
.login-switch svg { width: 18px; height: 18px; flex-shrink: 0; }
/* Both sign-in panels take the password panel's height, so switching does not move the centred card. */
.login-panel { min-height: 320px; }
.login-panel form { margin-top: 0; gap: 14px; }
.login-panel label { margin-bottom: -6px; }
.login-panel .tc-check { margin: 0; }
.login-hint { margin: 16px 0 0; }
@media (max-width: 520px) {
  main { padding: 28px 16px; align-items: flex-start; }
  .login-panel { min-height: 0; }
  .login-switch a { padding: 10px 8px; }
}
@media (prefers-reduced-motion: reduce) { .login-switch a { transition: none; } }