diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..6f3a291
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "liveServer.settings.port": 5501
+}
\ No newline at end of file
diff --git a/app.js b/app.js
index f6eef76..1d41000 100644
--- a/app.js
+++ b/app.js
@@ -1,4 +1,4 @@
-const {DOM, Tag, H} = Gale({
+const {DOM, Tag, H, App} = Gale({
   Form:{
     padding: "20px"
   },
@@ -32,6 +32,9 @@ const {DOM, Tag, H} = Gale({
     padding:"0.5rem",
     background:"yellow",
     color:"black",
+    ":hover":{
+      color:"white"
+    }
   },
   Delete:{
     fontSize:"0.6rem",
@@ -98,8 +101,9 @@ function List()
   ));
 }
 
-van.add(
-  document.body, H.Form
+
+App("body",
+  H.Form
   (
     H.Title("todos"),
     Form(),
diff --git a/dist/core.d.ts b/dist/core.d.ts
index 2494723..c481079 100644
--- a/dist/core.d.ts
+++ b/dist/core.d.ts
@@ -87,6 +87,7 @@ declare global
     type CreateSheet = <T extends UserSheet>(sheet:UserSheet&T, hash?:string)=>{
       Tag:(...args:CrossMultiplyRecord<T>[])=>string,
       CSS:string,
+      App:(selector:string, ...elements:Van.ChildDom[])=>ShadowRoot,
       DOM:Elemental<CrossMultiplyRecord<T>>,
       H:Circular<CrossMultiplyRecord<T>, Van.TagFunc<HTMLDivElement>>
     }
diff --git a/dist/core.js b/dist/core.js
index ed5ed39..203fb48 100644
--- a/dist/core.js
+++ b/dist/core.js
@@ -8,7 +8,7 @@
 vanX.Store=(e,t)=>{const a=localStorage.getItem(t),r=vanX.reactive(a?JSON.parse(a):e);return van.derive((()=>localStorage.setItem(t,JSON.stringify(vanX.compact(r))))),r};
 
 //gale
-globalThis.Gale=(e,t="")=>{const n=(e,t,s)=>`${e}{${Object.keys(t).map((e=>{const r=t[e];switch(e[0]){case"@":return n(`@media(max-width:${e.substring(1)})`,r,s);case":":return n(`&${e}`,r,s);case".":return n(`${e}${s}`,r,s);case"^":return n(`&:hover .${e.substring(1)}${s}`,r,s)}return`${e.replace(/([a-z])([A-Z])/g,"$1-$2")}: ${r};`})).join("\n")}}`,s=(e,t)=>{const n=t.lastIndexOf(e)+e.length;return n?t.substring(n):t},r=e=>{const t=van.tags[e];let n=[];const s=new Proxy(((...e)=>{const s=t(...e);return s.className=n.join(a+" ")+a+" "+s.className,n=[],s}),{get:(e,t)=>(n.push(t.substring(t.lastIndexOf(".")+1)),s)});return s},a=t?"_"+t:"",c=Object.keys(e).map((t=>n("."+t+a,e[t],a))).join("\n");return globalThis.document?.head.insertAdjacentHTML("beforeend",`<style data-sheet="${a}">${c}</style>`),{Tag:(...e)=>e.map((e=>s("^",s(".",e)))).join(a+" ")+a,CSS:c,DOM:new Proxy({},{get:(e,t)=>r(t)}),H:new Proxy({},{get:(e,t)=>r("div")[t]})}};
+globalThis.Gale=(e,t="")=>{const n=(e,t,o)=>`${e}{${Object.keys(t).map((e=>{const a=t[e];switch(e[0]){case"@":return n(`@media(max-width:${e.substring(1)})`,a,o);case":":return n(`&${e}`,a,o);case".":return n(`${e}${o}`,a,o);case"^":return n(`&:hover .${e.substring(1)}${o}`,a,o)}return`${e.replace(/([a-z])([A-Z])/g,"$1-$2").toLowerCase()}: ${a};`})).join("\n")}}`,o=(e,t)=>{const n=t.lastIndexOf(e)+e.length;return n?t.substring(n):t},a=e=>{const t=van.tags[e];let n=[];const o=new Proxy(((...e)=>{const o=t(...e);return o.className=n.join(i+" ")+i+" "+o.className,n=[],o}),{get:(e,t)=>(n.push(t.substring(t.lastIndexOf(".")+1)),o)});return o},i=t?"_"+t:"",r=Object.keys(e).map((t=>n("."+t+i,e[t],i))).join("\n"),s=document.createElement("style");return s.setAttribute("data-sheet",i),s.textContent=r+"*{margin:0;padding:0;box-sizing:border-box;}html, :host{height:100%;width:100%;font-family:Arial, sans-serif;line-height:1.6;}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}img, video{max-width:100%;height:auto;}a{text-decoration:none;color:inherit;}ul, ol{list-style:none;}button, input, textarea{font-family:inherit;font-size:inherit;line-height:inherit;border:none;background:none;padding:0;margin:0;outline:none;}table{border-collapse:collapse;width:100%;}",globalThis.document?.head.appendChild(s),{Tag:(...e)=>e.map((e=>o("^",o(".",e)))).join(i+" ")+i,CSS:r,App(e,...t){const n=document.querySelector(e).attachShadow({mode:"open"});return n.appendChild(s),van.add(n,...t),n},DOM:new Proxy({},{get:(e,t)=>a(t)}),H:new Proxy({},{get:(e,t)=>a("div")[t]})}};
 
 //boot
 ((t="/")=>{fetch(t+"deno.json").then((t=>t.json())).then((e=>{const n=(t,e)=>{let n=document.createElement("script");n.type=t,n.textContent=e,document.head.appendChild(n)},o=e.imports;for(let e in o){const n=o[e];n.startsWith("./")&&(o[e]=t+n.substring(2))}n("importmap",JSON.stringify({imports:o})),n("module",'import "entry"; ')}))})();
\ No newline at end of file
diff --git a/dist/index.html b/dist/index.html
index 79473eb..5fcd8a4 100644
--- a/dist/index.html
+++ b/dist/index.html
@@ -3,7 +3,6 @@
     <head>
         <meta charset="UTF-8">
         <meta name="viewport" content="width=device-width, initial-scale=1.0">
-        <!-- css reset --><style>*{margin:0;padding:0;box-sizing:border-box;}html, body{height:100%;width:100%;font-family:Arial, sans-serif;line-height:1.6;}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}img, video{max-width:100%;height:auto;}a{text-decoration:none;color:inherit;}ul, ol{list-style:none;}button, input, textarea{font-family:inherit;font-size:inherit;line-height:inherit;border:none;background:none;padding:0;margin:0;outline:none;}table{border-collapse:collapse;width:100%;}</style>
     </head>
     <body></body>
 </html>
\ No newline at end of file
diff --git a/index.html b/index.html
index 15b630e..0f4d254 100644
--- a/index.html
+++ b/index.html
@@ -3,7 +3,6 @@
     <head>
         <meta charset="UTF-8">
         <meta name="viewport" content="width=device-width, initial-scale=1.0">
-        <!-- css reset --><style>*{margin:0;padding:0;box-sizing:border-box;}html, body{height:100%;width:100%;font-family:Arial, sans-serif;line-height:1.6;}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}img, video{max-width:100%;height:auto;}a{text-decoration:none;color:inherit;}ul, ol{list-style:none;}button, input, textarea{font-family:inherit;font-size:inherit;line-height:inherit;border:none;background:none;padding:0;margin:0;outline:none;}table{border-collapse:collapse;width:100%;}</style>
         <script src="./dist/core.js"></script>
         <script src="./src/gale.js"></script>
     </head>
diff --git a/shadow.html b/shadow.html
deleted file mode 100644
index 37f2ad2..0000000
--- a/shadow.html
+++ /dev/null
@@ -1,43 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Shadow DOM Example</title>
-</head>
-<body>
-    
-
-    <script>
-        // Define the custom web component
-        class APP extends HTMLElement {
-            constructor() {
-                super();
-
-                // Attach a shadow root to the custom element
-                const shadowRoot = this.attachShadow({ mode: 'open' });
-
-                // Add custom markup and styles to the shadow root
-                shadowRoot.innerHTML = `
-                    <style>
-                        .shadow-content {
-                            color: white;
-                            background-color: black;
-                            padding: 10px;
-                            border-radius: 5px;
-                        }
-                    </style>
-                    <div class="shadow-content">
-                        This is content inside the shadow root of a web component.
-                    </div>
-                `;
-            }
-        }
-
-        // Register the custom element
-        customElements.define('gale-app', APP);
-    </script>
-
-    <gale-app></gale-app>
-</body>
-</html>
\ No newline at end of file
diff --git a/src/boot.js b/src/boot.js
index 34d0157..863c73e 100644
--- a/src/boot.js
+++ b/src/boot.js
@@ -9,7 +9,7 @@
             const path=imports[n];
             path.startsWith("./")&&(imports[n]=root+path.substring(2))
         }
-        n("importmap",JSON.stringify({imports})),
-        n("module",'import "entry"; ')
+        n("importmap",JSON.stringify({imports}));
+        n("module",'import "entry"; ');
     })
 )();
\ No newline at end of file
diff --git a/src/gale.js b/src/gale.js
index ba5ed1d..928fb6f 100644
--- a/src/gale.js
+++ b/src/gale.js
@@ -60,13 +60,22 @@ globalThis.Gale = (sheet, hash="")=>
 
     const id = hash ? "_"+hash : "";
     const css = Object.keys(sheet).map(key=>Tier("."+key+id, sheet[key], id)).join(`\n`);
-    globalThis.document?.head.insertAdjacentHTML("beforeend", `<style data-sheet="${id}">${css}</style>`);
+    const style = document.createElement('style');
+    style.setAttribute("data-sheet", id);
+    style.textContent = css + `*{margin:0;padding:0;box-sizing:border-box;}html, :host{height:100%;width:100%;font-family:Arial, sans-serif;line-height:1.6;}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}img, video{max-width:100%;height:auto;}a{text-decoration:none;color:inherit;}ul, ol{list-style:none;}button, input, textarea{font-family:inherit;font-size:inherit;line-height:inherit;border:none;background:none;padding:0;margin:0;outline:none;}table{border-collapse:collapse;width:100%;}`;
+    globalThis.document?.head.appendChild(style);
 
     return {
         Tag(...args){
             return args.map((arg)=>extractLast(KeyGroup, extractLast(KeyChild, arg))).join(id+" ")+id;
         },
         CSS: css,
+        App(selector, ...elements){
+            const sr = document.querySelector(selector).attachShadow({ mode: 'open' });
+            sr.appendChild(style);
+            van.add(sr, ...elements);
+            return sr;
+        },
         DOM: new Proxy(
             {},
             {