diff --git a/extension/manifest.json b/extension/manifest.json
index 1e27937..a3df04a 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -42,5 +42,17 @@
             },
             "description": "Toggle InsightReply Sidebar"
         }
-    }
+    },
+    "web_accessible_resources": [
+        {
+            "resources": [
+                "src/assets/*",
+                "assets/*"
+            ],
+            "matches": [
+                "https://twitter.com/*",
+                "https://x.com/*"
+            ]
+        }
+    ]
 }
\ No newline at end of file
diff --git a/extension/src/content/sidebar-mount.ts b/extension/src/content/sidebar-mount.ts
index 13d9ea6..9b7fe9c 100644
--- a/extension/src/content/sidebar-mount.ts
+++ b/extension/src/content/sidebar-mount.ts
@@ -8,13 +8,16 @@ const currentTweetData = ref<any>(null)
 const sidebarVisible = ref(false)
 
 let isMounted = false
+let isMounting = false
 
-function initSidebar() {
-    if (isMounted) return
+async function initSidebar() {
+    if (isMounted || isMounting) return
 
     let host = document.getElementById(MOUNT_ID)
     if (host) return
 
+    isMounting = true
+
     // 1. Create Host Element
     host = document.createElement('div')
     host.id = MOUNT_ID
@@ -45,17 +48,51 @@ function initSidebar() {
     `
     shadowRoot.appendChild(container)
 
-    // 4. Inject Styles
-    const injectStyles = () => {
-        const styles = document.querySelectorAll('style, link[rel="stylesheet"]')
-        styles.forEach(style => {
-            shadowRoot.appendChild(style.cloneNode(true))
-        })
+    // 4. Inject Styles (Bypassing X.com CSP via fetch)
+    const injectStyles = async () => {
+        try {
+            // Check for Vite dev mode styles first
+            const devStyles = document.querySelectorAll('style[data-vite-dev-id]')
+            if (devStyles.length > 0) {
+                devStyles.forEach(style => shadowRoot.appendChild(style.cloneNode(true)))
+                console.log('[InsightReply] Injected dev styles into shadow DOM')
+                return
+            }
+
+            // Production mode: fetch the CSS file directly to bypass rigid CSP
+            // CRXJS usually puts built CSS in assets/index-[hash].css
+            const cssUrl = chrome.runtime.getURL('assets/index.css')
+            // In Vite dev mode the raw file might be available
+            const devUrl = chrome.runtime.getURL('src/assets/tailwind.css')
+
+            const urlToFetch = chrome.runtime.id.includes('extension') ? cssUrl : devUrl
+
+            const response = await fetch(urlToFetch)
+            if (response.ok) {
+                const cssText = await response.text()
+                const styleEl = document.createElement('style')
+                styleEl.textContent = cssText
+                shadowRoot.appendChild(styleEl)
+                console.log('[InsightReply] Successfully injected fetched CSS into shadow DOM')
+            } else {
+                console.warn('[InsightReply] Failed to fetch CSS file directly, falling back to basic link tag')
+                const linkEl = document.createElement('link')
+                linkEl.rel = 'stylesheet'
+                linkEl.href = chrome.runtime.getURL('src/assets/tailwind.css')
+                shadowRoot.appendChild(linkEl)
+            }
+        } catch (err) {
+            console.error('[InsightReply] Error injecting styles:', err)
+        }
     }
-    injectStyles()
+
+    // Inject and wait
+    await injectStyles()
 
     // 5. Create Vue App with reactive provide
     const app = createApp(Sidebar)
+
+    isMounting = false
     app.provide('currentTweetData', currentTweetData)
     app.provide('sidebarVisible', sidebarVisible)
     app.mount(container)