diff --git a/src/main.zig b/src/main.zig
index 321e9a9..c3570e7 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -2,6 +2,9 @@ const std = @import("std");
 const builtin = @import("builtin");
 const dvui = @import("dvui");
 const SDLBackend = @import("sdl-backend");
+const sdl_c = SDLBackend.c;
+const Allocator = std.mem.Allocator;
+const Color = dvui.Color;
 
 pub fn main() !void {
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
@@ -21,6 +24,7 @@ pub fn main() !void {
             .dark => dvui.Theme.builtin.adwaita_dark,
         },
     });
+
     defer win.deinit();
 
     var interrupted = false;
@@ -61,5 +65,51 @@ pub fn main() !void {
 }
 
 fn gui_frame() bool {
+    for (dvui.events()) |*e| {
+        if (e.evt == .window and e.evt.window.action == .close) return false;
+        if (e.evt == .app and e.evt.app.action == .quit) return false;
+    }
+
+    const root = dvui.box(
+        @src(),
+        .{ .dir = .horizontal },
+        .{ .expand = .both, .background = true, .style = .window },
+    );
+    defer root.deinit();
+
+    // Левая панель с фиксированной шириной
+    {
+        var left_panel = dvui.box(@src(), .{ .dir = .vertical }, .{ .expand = .vertical, .min_size_content = .{ .w = 200 }, .background = true });
+        defer left_panel.deinit();
+
+        dvui.label(@src(), "Tools", .{}, .{});
+        _ = dvui.button(@src(), "Button", .{}, .{});
+    }
+
+    // Правая панель - занимает оставшееся пространство
+    {
+        const back = dvui.box(
+            @src(),
+            .{ .dir = .horizontal },
+            .{ .expand = .both, .padding = dvui.Rect.all(12), .background = true },
+        );
+        defer back.deinit();
+
+        const fill_color = Color.white.opacity(0.5);
+        var right_panel = dvui.box(
+            @src(),
+            .{ .dir = .vertical },
+            .{
+                .expand = .both,
+                .background = true,
+                .corner_radius = dvui.Rect.all(10),
+                .color_fill = fill_color,
+            },
+        );
+        defer right_panel.deinit();
+
+        dvui.label(@src(), "Canvas", .{}, .{ .gravity_x = 0.5 });
+    }
+
     return true;
 }