Dark mode appearance tweaks

App/Common UI/ReliefButton.swift

@@ -80,38 +80,28 @@ class ReliefButton: UIButton
     }
     
     static func gradientColors(inverted: Bool, darkMode: Bool) -> [UIColor] {
-        if darkMode {
-            if !inverted {
+        let colors = { darkMode -> [UIColor] in
+            if darkMode {
                 return [
-                    UIColor(white: 0.20, alpha: 1.0),
-                    UIColor(white: 0.10, alpha: 1.0)
+                    UIColor(white: 0.15, alpha: 1.0),
+                    UIColor(white: 0.08, alpha: 1.0)
                 ]
             } else {
-                return [
-                    UIColor(white: 0.10, alpha: 1.0),
-                    UIColor(white: 0.30, alpha: 1.0)
-                ]
-            }
-        } else {
-            if !inverted {
                 return [
                     UIColor(white: 0.98, alpha: 1.0),
                     UIColor(white: 0.93, alpha: 1.0)
                 ]
-            } else {
-                return [
-                    UIColor(white: 0.88, alpha: 1.0),
-                    UIColor(white: 0.93, alpha: 1.0)
-                ]
             }
-        }
+        } (darkMode)
+        
+        return inverted ? colors.reversed() : colors
     }
     
     override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
         setBackgroundInverted(isHighlighted)
         backgroundView.layer.borderColor = { traitCollection -> UIColor in
             if traitCollection.userInterfaceStyle == .dark {
-                return .init(white: 0.34, alpha: 1.0)
+                return .init(white: 0.30, alpha: 1.0)
             } else {
                 return .white
             }

App/Titlebar and URL Bar/ToolbarView.swift

@@ -15,13 +15,7 @@ class ToolbarView: UIView
     
     let containerView = UIView(frame: .zero)
     let backgroundView = GradientView(direction: .vertical, colors: [
-        .init(dynamicProvider: { traits in
-            if traits.userInterfaceStyle == .dark  {
-                return UIColor(white: 0.15, alpha: 1.0)
-            } else {
-                return UIColor.tertiarySystemGroupedBackground
-            }
-        }),
+        .secondarySystemGroupedBackground,
         .secondarySystemGroupedBackground
     ])
     let cancelButton = UIButton(type: .system)
@@ -50,7 +44,12 @@ class ToolbarView: UIView
     
     override func sizeThatFits(_ size: CGSize) -> CGSize
     {
-        return CGSize(width: size.width, height: 42.0)
+        var height: CGFloat = 42.0
+        if traitCollection.userInterfaceIdiom == .mac {
+            height = 40.0
+        }
+        
+        return CGSize(width: size.width, height: height)
     }
     
     override func layoutSubviews()

App/Titlebar and URL Bar/ToolbarViewController.swift

@@ -88,7 +88,7 @@ class ToolbarViewController: UIViewController
         toolbarView.trailingButtonsView.removeAllButtonViews()
         
         let spacerView = { () -> SpacerView in
-            SpacerView(space: 24.0)
+            SpacerView(space: 20.0)
         }
         
         // Setup toolbar based on trait collection