diff --git a/Documentation/UIKit.md b/Documentation/UIKit.md
index 60a34a0..9bd9df7 100644
--- a/Documentation/UIKit.md
+++ b/Documentation/UIKit.md
@@ -436,7 +436,173 @@ making part of a label tappable.
 
 ## Navigation & Controllers
 
-<!-- batch 11 -->
+<details>
+<summary><b>UINavigationController</b> — completion-handler push/pop, transparent bar</summary>
+
+### `func pushViewController(_:animated: Bool = true, completion: (() -> Void)? = nil)`
+### `func popViewController(animated: Bool = true, _ completion: (() -> Void)? = nil)`
+### `func popToViewController(_:animated: Bool = true, _ completion: (() -> Void)? = nil)`
+The standard transitions with a completion block (wrapped in a `CATransaction`).
+
+```swift
+navigationController?.pushViewController(detail) {
+    print("detail is on screen")
+}
+```
+
+### `func pushViewController(_:hidesBottomBar: Bool = false, animated: Bool = true)` — *not tvOS*
+Push while setting `hidesBottomBarWhenPushed`.
+
+### `func makeTransparent(withTint tint: UIColor = .white)`
+Clear background + shadow, translucent, tinted bar/title.
+
+```swift
+navigationController?.makeTransparent(withTint: .label)
+```
+
+</details>
+
+<details>
+<summary><b>UIViewController</b> — state, instantiation, dismissal, toasts, keyboard, observers</summary>
+
+### `var isVisible: Bool` / `var isLoaded: Bool`
+View is loaded **and** in a window. (`isLoaded` is an alias.)
+
+### `var isModal: Bool`
+Whether the controller is presented modally (vs. pushed).
+
+### `static var className: String` / `static var identifier: String` / `static var segueID: String`
+`"MyVC"`, `"idMyVC"`, `"idSegueMyVC"`.
+
+### `static func instantiate<T>(storyBoard: String, identifier: String? = nil, bundle: Bundle? = …) -> T`
+Load a controller from a storyboard by (default) `T.identifier`.
+
+```swift
+let vc: ProfileVC = ProfileVC.instantiate(storyBoard: "Main")
+```
+
+### `static func instatiate<T>(nibName: String, bundle: Bundle? = nil) -> T` *(sic — "instatiate")*
+Load from a nib and force an initial layout pass.
+
+### `func present(viewControllerToPresent:completion: @escaping () -> Void)`
+`present(_:animated:)` with a completion block.
+
+### `func closeController(jumpToController: UIViewController? = nil, completion: @escaping () -> Void)`
+Dismiss if modal, else pop (to `jumpToController` if given), then call `completion`.
+
+```swift
+closeController { self.refreshList() }
+```
+
+### `func show(toastWith message:, font: = system 12, toastPosition: ToastPosition, backgroundColor: = .black, textColor: = .white, duration: = 3)`
+Show a temporary rounded toast label. `ToastPosition` is `.top` / `.down`
+(notch-aware at the top).
+
+```swift
+show(toastWith: "Saved", toastPosition: .down)
+```
+
+### `func addNotificationObserver(name:selector:)` / `func removeNotificationObserver(name:)` / `func removeNotificationsObserver()`
+`NotificationCenter` registration shortcuts (last one removes all).
+
+### `@objc func dismissSystemKeyboard(_ sender: UITapGestureRecognizer)`
+Ready-made selector for a tap-to-dismiss-keyboard gesture.
+
+```swift
+view.addGestureRecognizer(UITapGestureRecognizer(target: self,
+    action: #selector(dismissSystemKeyboard(_:))))
+```
+
+</details>
+
+<details>
+<summary><b>UITabBarController</b> — badges, animated tab switching</summary>
+
+### `func setBadges(badgeValues: [Int], font: UIFont = Helvetica-Light 11)`
+Set numeric badges for every tab at once (`0` = no badge). Custom-drawn
+(`CustomTabBadge` label), so they position above each tab item.
+
+```swift
+tabBarController?.setBadges(badgeValues: [0, 3, 0, 12])
+```
+
+### `func addBadge(index:value:color:font:)`
+Add a single custom badge.
+
+### `func setSelectedView(atIndex:withAnimation: Bool = false, completion:)`
+Select a tab (pops that tab's nav stack to root first).
+
+### `func setSelectedView(withNoPop atIndex:withAnimation: Bool = false, completion:)`
+Same, without popping to root.
+
+### `func animateToTab(toIndex: Int)`
+Slide-transition between tabs.
+
+### `func changeViewControllerToItem(withViewController:Item:)`
+Replace a tab's root controller then switch to that tab.
+
+```swift
+tabBarController?.changeViewControllerToItem(withViewController: NewHome(), Item: 0)
+```
+
+### `class CustomTabBadge: UILabel`
+The badge label type used above (`init(font:)`).
+
+</details>
+
+<details>
+<summary><b>UIApplication</b> — environment, app info, open URL</summary>
+
+### `enum Environment` + `static var inferredEnvironment: Environment`
+`.debug` / `.testFlight` / `.appStore`, inferred from build config, simulator, and
+the provisioning/receipt files.
+
+```swift
+if UIApplication.inferredEnvironment == .appStore { enableAnalytics() }
+```
+
+### `static var displayName: String?` / `static var buildNumber: String?` / `static var version: String?`
+Bundle info values. (`LCEssentials.appVersion` etc. forward to these.)
+
+### `static func openURL(urlStr: String)`
+Open a URL string if it can be opened.
+
+```swift
+UIApplication.openURL(urlStr: "https://loverde.com.br")
+```
+
+</details>
+
+<details>
+<summary><b>UIResponder</b></summary>
+
+### `var getParentViewController: UIViewController?`
+Walk the responder chain to the owning view controller.
+
+```swift
+someView.getParentViewController?.present(alert, animated: true)
+```
+
+</details>
+
+<details>
+<summary><b>UIDevice</b> — notch metrics, model name</summary>
+
+### `static var topNotch: CGFloat` / `static var bottomNotch: CGFloat` / `static var hasNotch: Bool`
+Safe-area top/bottom insets and whether the device has a notch / Dynamic Island.
+
+```swift
+let headerY: CGFloat = UIDevice.hasNotch ? 44 : 20
+```
+
+### `var modelName: String`
+Marketing name from the hardware identifier (`"iPhone 15 Pro"`, `"iPad Air (5th generation)"`, …); falls back to the raw identifier for unknown devices. Reads `SIMULATOR_MODEL_IDENTIFIER` on the simulator.
+
+```swift
+UIDevice.current.modelName   // "iPhone 16 Pro"
+```
+
+</details>
 
 ## Collections & Tables