diff --git a/pyproject.toml b/pyproject.toml
index ad91a12..7fb4747 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "funcnodes-plotly"
-version = "1.1.1"
+version = "1.1.2"
 description = ""
 readme = "README.md"
 classifiers = [
diff --git a/src/funcnodes_plotly/react_plugin/plugin-custom-renders.css b/src/funcnodes_plotly/react_plugin/plugin-custom-renders.css
index e3b1874..9fb672c 100644
--- a/src/funcnodes_plotly/react_plugin/plugin-custom-renders.css
+++ b/src/funcnodes_plotly/react_plugin/plugin-custom-renders.css
@@ -1 +1 @@
-.funcnodes_plotly_container{width:100%;height:100%;min-height:300px;min-width:300px}.dialogchildren .funcnodes_plotly_container{min-height:60vh}
+.funcnodes_plotly_container{width:100%;height:100%;min-height:300px;min-width:300px}.dialog-children .funcnodes_plotly_container{min-height:60vh}
diff --git a/src/react_plugin/package.json b/src/react_plugin/package.json
index d8331af..9c99223 100644
--- a/src/react_plugin/package.json
+++ b/src/react_plugin/package.json
@@ -9,6 +9,7 @@
         "dist"
     ],
     "scripts": {
+        "test": "node --test",
         "build": "tsc && vite build",
         "dev": "vite build --watch",
         "typecheck": "tsc --noEmit"
diff --git a/src/react_plugin/src/style.css b/src/react_plugin/src/style.css
index 89ed653..5ceaffa 100644
--- a/src/react_plugin/src/style.css
+++ b/src/react_plugin/src/style.css
@@ -5,6 +5,6 @@
   min-width: 300px;
 }
 
-.dialogchildren .funcnodes_plotly_container {
+.dialog-children .funcnodes_plotly_container {
   min-height: 60vh;
 }
diff --git a/src/react_plugin/test/style.css.test.js b/src/react_plugin/test/style.css.test.js
new file mode 100644
index 0000000..4337d9f
--- /dev/null
+++ b/src/react_plugin/test/style.css.test.js
@@ -0,0 +1,52 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const rootDir = path.resolve(__dirname, "..");
+
+const srcStylePath = path.join(rootDir, "src", "style.css");
+const distStylePath = path.join(rootDir, "dist", "plugin-custom-renders.css");
+const packagedStylePath = path.join(
+  rootDir,
+  "..",
+  "funcnodes_plotly",
+  "react_plugin",
+  "plugin-custom-renders.css"
+);
+
+function readTextFile(filePath) {
+  return fs.readFileSync(filePath, "utf8");
+}
+
+test("src/style.css uses Radix `dialog-children` selector for dialog sizing", () => {
+  const css = readTextFile(srcStylePath);
+  assert.match(css, /\.dialog-children\s+\.funcnodes_plotly_container\s*\{/);
+});
+
+test("src/style.css does not use deprecated `dialogchildren` selector", () => {
+  const css = readTextFile(srcStylePath);
+  assert.doesNotMatch(css, /\.dialogchildren\s+\.funcnodes_plotly_container\s*\{/);
+});
+
+test("src/style.css defines a minimum preview size", () => {
+  const css = readTextFile(srcStylePath);
+  assert.match(
+    css,
+    /\.funcnodes_plotly_container\s*\{[^}]*min-height:\s*300px;[^}]*min-width:\s*300px;[^}]*\}/s
+  );
+});
+
+test("dist/plugin-custom-renders.css matches src dialog selector", () => {
+  const css = readTextFile(distStylePath);
+  assert.match(css, /\.dialog-children\s+\.funcnodes_plotly_container\s*\{/);
+  assert.doesNotMatch(css, /\.dialogchildren\s+\.funcnodes_plotly_container\s*\{/);
+});
+
+test("funcnodes_plotly/react_plugin/plugin-custom-renders.css matches src dialog selector", () => {
+  const css = readTextFile(packagedStylePath);
+  assert.match(css, /\.dialog-children\s+\.funcnodes_plotly_container\s*\{/);
+  assert.doesNotMatch(css, /\.dialogchildren\s+\.funcnodes_plotly_container\s*\{/);
+});
diff --git a/uv.lock b/uv.lock
index f17ae9e..946521c 100644
--- a/uv.lock
+++ b/uv.lock
@@ -607,7 +607,7 @@ wheels = [
 
 [[package]]
 name = "funcnodes-plotly"
-version = "1.1.1"
+version = "1.1.2"
 source = { editable = "." }
 dependencies = [
     { name = "funcnodes" },