diff --git a/app/components/CodeEditor.tsx b/app/components/CodeEditor.tsx
index 18704aa..22c282a 100644
--- a/app/components/CodeEditor.tsx
+++ b/app/components/CodeEditor.tsx
@@ -73,7 +73,7 @@ export default function CodeEditor({
   };
 
   return (
-    <div className="mb-4 code-editor-wrapper position-relative">
+    <div className="gui-input code-editor-wrapper position-relative">
       <InputLabel
         label={label}
         help={help}
diff --git a/app/renderer.tsx b/app/renderer.tsx
index 4035219..352a4e2 100644
--- a/app/renderer.tsx
+++ b/app/renderer.tsx
@@ -135,6 +135,7 @@ function RenderedTreeNode({
           children={children}
           onChange={onChange}
           state={state}
+          className={props.className}
         />
       );
     case "nav-tab-content":
@@ -526,10 +527,12 @@ export function RenderedChildren({
   children,
   onChange,
   state,
+  className,
 }: {
   children: Array<TreeNode>;
   onChange: OnChange;
   state: Record<string, any>;
+  className?: string;
 }) {
   let elements = children.map((node, idx) => {
     let key;
@@ -538,6 +541,10 @@ export function RenderedChildren({
     } else {
       key = `idx:${idx}`;
     }
+    let prevClassName = node.props.className || "";
+    if (className && !prevClassName.includes(className)) {
+      node.props.className = `${className} ${prevClassName}`;
+    }
     return (
       <RenderedTreeNode
         key={key}
diff --git a/package-lock.json b/package-lock.json
index c976af1..b550d67 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "gooey-gui",
-  "version": "0.2.0",
+  "version": "0.5.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "gooey-gui",
-      "version": "0.2.0",
+      "version": "0.5.0",
       "dependencies": {
         "@codemirror/lang-javascript": "^6.2.2",
         "@codemirror/lint": "^6.8.1",
diff --git a/py/gooey_gui/components/common.py b/py/gooey_gui/components/common.py
index f086b01..281d284 100644
--- a/py/gooey_gui/components/common.py
+++ b/py/gooey_gui/components/common.py
@@ -15,6 +15,18 @@
 BLANK_OPTION = "———"
 
 
+StyleProp = typing.Optional[
+    typing.TypedDict(
+        "StyleProp",
+        {
+            "selector": dict[str, dict[str, str]],
+            "@media": dict[str, dict[str, str]],
+        },
+        total=False,
+    )
+]
+
+
 def _default_format(value: typing.Any) -> str:
     if value is None:
         return BLANK_OPTION
@@ -54,17 +66,17 @@ def nav_tab_content():
     return _node("nav-tab-content")
 
 
-def div(**props) -> core.NestingCtx:
-    return tag("div", **props)
+def div(*, style: StyleProp = None, **props) -> core.NestingCtx:
+    return tag("div", style=style, **props)
 
 
 def link(*, to: str, **props) -> core.NestingCtx:
     return _node("Link", to=to, **props)
 
 
-def tag(tag_name: str, **props) -> core.NestingCtx:
+def tag(tag_name: str, *, style: StyleProp = None, **props) -> core.NestingCtx:
     props["__reactjsxelement"] = tag_name
-    return _node("tag", **props)
+    return _node("tag", style=style, **props)
 
 
 def html(body: str, **props):
@@ -115,11 +127,30 @@ def markdown(
 
 
 def _node(nodename: str, **props):
+    if style := props.get("style"):
+        selector = style.pop("selector", None)
+        if selector:
+            identifier = "." + core.md5_values(selector)
+            for s, rules in selector.items():
+                _node("css-in-js", selector=s.replace("&", identifier), rules=rules)
+            props["className"] = " ".join(
+                filter(None, (props.get("className"), identifier))
+            )
+        # media = style.pop("@media", None)
     node = core.RenderTreeNode(name=nodename, props=props)
     node.mount()
     return core.NestingCtx(node)
 
 
+def styled(css: str) -> core.RenderTreeNode:
+    css = dedent(css).strip()
+    className = "gui-" + core.md5_values(css)
+    selector = "." + className
+    css = css.replace("&", selector)
+    core.add_styles(className, css)
+    return _node("", className=className)
+
+
 def text(body: str, **props):
     core.RenderTreeNode(
         name="pre",
diff --git a/py/gooey_gui/core/__init__.py b/py/gooey_gui/core/__init__.py
index 602aa15..4191848 100644
--- a/py/gooey_gui/core/__init__.py
+++ b/py/gooey_gui/core/__init__.py
@@ -16,7 +16,14 @@
     realtime_clear_subs,
     md5_values,
 )
-from .renderer import RenderTreeNode, NestingCtx, renderer, route, current_root_ctx
+from .renderer import (
+    RenderTreeNode,
+    NestingCtx,
+    renderer,
+    route,
+    current_root_ctx,
+    add_styles,
+)
 from .state import (
     get_session_state,
     set_session_state,
diff --git a/py/gooey_gui/core/renderer.py b/py/gooey_gui/core/renderer.py
index 4157f20..50a16b4 100644
--- a/py/gooey_gui/core/renderer.py
+++ b/py/gooey_gui/core/renderer.py
@@ -23,6 +23,10 @@ def current_root_ctx() -> "NestingCtx":
     return threadlocal.root_ctx
 
 
+def add_styles(className: str, css: str):
+    threadlocal.styles[className] = css
+
+
 class RenderTreeNode(BaseModel):
     name: str
     props: ReactHTMLProps = {}
@@ -108,17 +112,27 @@ def renderer(
     set_query_params(query_params or {})
     realtime_clear_subs()
     threadlocal.use_state_count = 0
+    threadlocal.styles = {}
     while True:
         try:
             root = RenderTreeNode(name="root")
             threadlocal.root_ctx = NestingCtx(root)
             with threadlocal.root_ctx:
+                styles_node = RenderTreeNode(
+                    name="tag",
+                    props=dict(__reactjsxelement="style"),
+                ).mount()
                 try:
                     ret = render()
                 except StopException:
                     ret = None
                 except RedirectException as e:
                     return RedirectResponse(e.url, status_code=e.status_code)
+                if threadlocal.styles:
+                    styles_node.props["dangerouslySetInnerHTML"] = {
+                        "__html": "\n".join(threadlocal.styles.values())
+                    }
+            print(get_subscriptions())
             if isinstance(ret, Response):
                 return ret
             return JSONResponse(