Add blur and shadow to window component

src/dusk/ui/game_menu.cpp

@@ -281,7 +281,6 @@ private:
                               {"justify-content", "center"},
                               {"box-sizing", "border-box"},
                               {"padding", "32dp"},
-                              {"background-color", rgba(ModalOverlay)},
                           });
         return screen;
     }

src/dusk/ui/theme.hpp

@@ -12,7 +12,6 @@ struct Color {
 };
 
 inline constexpr Color Background1{12, 18, 17, 255};
-inline constexpr Color ModalOverlay{12, 18, 17, 229};
 inline constexpr Color Text{225, 236, 231, 255};
 inline constexpr Color TextActive{248, 255, 251, 255};
 inline constexpr Color TextDim{160, 191, 182, 255};

src/dusk/ui/window.cpp

@@ -158,6 +158,8 @@ Window::Window(Rml::Element* parent, std::string_view id, std::function<void()>
         {"border-radius", dp(BorderRadiusMedium)},
         {"border-color", rgba(ElevatedBorder)},
         {"background-color", rgba(WindowSurface)},
+        {"backdrop-filter", "blur(5dp)"},
+        {"box-shadow", "0 0 25dp 5dp"},
         {"overflow", "hidden"},
     });