--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/infinite_canvas/theme.h	Mon Aug 17 16:57:56 2026 -0700
@@ -0,0 +1,41 @@
+#ifndef INFINITE_CANVAS_THEME_H
+#define INFINITE_CANVAS_THEME_H
+
+#include "dowa/dowa.h"
+#include "third_party/raylib/include/raylib.h"
+
+typedef enum {
+    CANVAS_THEME_AUTO = 0,
+    CANVAS_THEME_LIGHT,
+    CANVAS_THEME_DARK,
+} Canvas_Theme_Mode;
+
+typedef struct {
+    Canvas_Theme_Mode requested_mode;
+    Canvas_Theme_Mode resolved_mode;
+    Color background;
+    Color surface;
+    Color surface_muted;
+    Color border;
+    Color text;
+    Color text_muted;
+    Color accent;
+    Color accent_soft;
+    Color shadow;
+    Color toast_surface;
+    Color toast_border;
+} Canvas_Theme;
+
+Canvas_Theme_Mode Canvas_Theme_Mode_From_String(const char *p_value);
+boolean Canvas_System_Prefers_Dark(void);
+void Canvas_Theme_Resolve(Canvas_Theme *p_theme, Canvas_Theme_Mode mode);
+void Canvas_Theme_Toggle(Canvas_Theme *p_theme);
+void Canvas_Theme_Draw_Shadow(
+    const Canvas_Theme *p_theme,
+    Rectangle bounds,
+    float roundness,
+    int32 segments,
+    float zoom,
+    float opacity);
+
+#endif