+/**
+ * GTK_STYLE_CLASS_OSD:
+ *
+ * A CSS class used when rendering an OSD (On Screen Display) element,
+ * on top of another container.
+ */
+#define GTK_STYLE_CLASS_OSD "osd"
+
+/**
+ * GTK_STYLE_CLASS_LEVEL_BAR:
+ *
+ * A CSS class used when rendering a level indicator, such
+ * as a battery charge level, or a password strength.
+ *
+ * This is used by #GtkLevelBar.
+ */
+#define GTK_STYLE_CLASS_LEVEL_BAR "level-bar"
+
+/**
+ * GTK_STYLE_CLASS_CURSOR_HANDLE:
+ *
+ * A CSS class used when rendering a drag handle for
+ * text selection.
+ */
+#define GTK_STYLE_CLASS_CURSOR_HANDLE "cursor-handle"
+
+/**
+ * GTK_STYLE_CLASS_INSERTION_CURSOR:
+ *
+ * A CSS class used when rendering a drag handle for
+ * the insertion cursor position.
+ */
+#define GTK_STYLE_CLASS_INSERTION_CURSOR "insertion-cursor"
+
+