diff --git a/frontend/manifest.json b/frontend/manifest.json
index daf9b1c..9d4ae3f 100644
--- a/frontend/manifest.json
+++ b/frontend/manifest.json
@@ -35,7 +35,7 @@
   },
   "web_accessible_resources": [
     {
-      "resources": ["packages/prism.css"],
+      "resources": ["packages/prism.css","packages/prism-light.css"],
       "matches": ["<all_urls>"]
     }
   ],
diff --git a/frontend/packages/prism-light.css b/frontend/packages/prism-light.css
new file mode 100644
index 0000000..cd20098
--- /dev/null
+++ b/frontend/packages/prism-light.css
@@ -0,0 +1,116 @@
+/* PrismJS 1.30.0 - Light Mode Theme
+https://prismjs.com/download#themes=prism-tomorrow&languages=markup+css+clike+javascript+c+csharp+cpp+go+java+kotlin+markup-templating+php+python+ruby+rust+swift+typescript */
+
+code[class*=language-],
+pre[class*=language-] {
+    color: #333;
+    background: 0 0;
+    font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
+    font-size: 1em;
+    text-align: left;
+    white-space: pre;
+    word-spacing: normal;
+    word-break: normal;
+    word-wrap: normal;
+    line-height: 1.5;
+    -moz-tab-size: 4;
+    -o-tab-size: 4;
+    tab-size: 4;
+    -webkit-hyphens: none;
+    -moz-hyphens: none;
+    -ms-hyphens: none;
+    hyphens: none;
+}
+
+pre[class*=language-] {
+    padding: 1em;
+    margin: .5em 0;
+    overflow: auto;
+}
+
+:not(pre) > code[class*=language-],
+pre[class*=language-] {
+    background: #f8f8f8;
+    border: 1px solid #e8e8e8;
+}
+
+:not(pre) > code[class*=language-] {
+    padding: .1em;
+    border-radius: .3em;
+    white-space: normal;
+}
+
+.token.block-comment,
+.token.cdata,
+.token.comment,
+.token.doctype,
+.token.prolog {
+    color: #708090;
+}
+
+.token.punctuation {
+    color: #999;
+}
+
+.token.attr-name,
+.token.deleted,
+.token.namespace,
+.token.tag {
+    color: #d73a49;
+}
+
+.token.function-name {
+    color: #005cc5;
+}
+
+.token.boolean,
+.token.function,
+.token.number {
+    color: #e36209;
+}
+
+.token.class-name,
+.token.constant,
+.token.property,
+.token.symbol {
+    color: #b08800;
+}
+
+.token.atrule,
+.token.builtin,
+.token.important,
+.token.keyword,
+.token.selector {
+    color: #d73a49;
+}
+
+.token.attr-value,
+.token.char,
+.token.regex,
+.token.string,
+.token.variable {
+    color: #22863a;
+}
+
+.token.entity,
+.token.operator,
+.token.url {
+    color: #005cc5;
+}
+
+.token.bold,
+.token.important {
+    font-weight: 700;
+}
+
+.token.italic {
+    font-style: italic;
+}
+
+.token.entity {
+    cursor: help;
+}
+
+.token.inserted {
+    color: #28a745;
+}
\ No newline at end of file
diff --git a/frontend/scripts/content.js b/frontend/scripts/content.js
index 19c1dd2..7ba0c58 100644
--- a/frontend/scripts/content.js
+++ b/frontend/scripts/content.js
@@ -20,12 +20,12 @@ async function handleElementClick(e) {
 
   const cacheKey = `translation_${hashCode(selectedCode)}`;
   const originalWidth = clickedElement.getBoundingClientRect().width;
-  const { targetLanguage } = await chrome.storage.sync.get("targetLanguage");
+  const { targetLanguage, theme } = await chrome.storage.sync.get(["targetLanguage", "theme"]);
   const lang = targetLanguage;
   const cachedData = await getFromCache(cacheKey);
 
   if (cachedData && cachedData[lang]) {
-    injectOrUpdateTranslations(cachedData, clickedElement, originalWidth);
+    injectOrUpdateTranslations(cachedData, clickedElement, originalWidth,theme);
     return;
   }
 
@@ -58,7 +58,7 @@ async function handleElementClick(e) {
         const newData = cachedData || {};
         newData[lang] = cleaned;
         await saveToCache(cacheKey, newData, 10);
-        injectOrUpdateTranslations(newData, clickedElement, originalWidth);
+        injectOrUpdateTranslations(newData, clickedElement, originalWidth,theme);
       }
     }
   );
diff --git a/frontend/scripts/ui.js b/frontend/scripts/ui.js
index f310db5..387ca85 100644
--- a/frontend/scripts/ui.js
+++ b/frontend/scripts/ui.js
@@ -1,7 +1,8 @@
 export function injectOrUpdateTranslations(
   translations,
   originalElement,
-  width
+  width,
+  currentTheme
 ) {
   const componentStyles = `
         .tab-nav {
@@ -42,33 +43,67 @@ export function injectOrUpdateTranslations(
             right: 8px;
             padding: 6px 12px;
             font-size: 14px;
-            background-color: rgba(255, 255, 255, 0.08); /* soft overlay */
-            border: 1px solid rgba(255, 255, 255, 0.2);
+            background-color: rgba(0, 0, 0, 0.05); /* soft overlay */
+            border: 1px solid rgba(0, 0, 0, 0.1);
             border-radius: 4px;
-            color: #f0f0f0;
+            color: #333;
             cursor: pointer;
             transition: background-color 0.3s, border-color 0.3s, color 0.3s;
             z-index: 10;
         }
         .copy-button:hover {
-            background-color: rgba(255, 255, 255, 0.15);
-            border-color: rgba(255, 255, 255, 0.3);
-            color: #ffffff;
+            background-color: rgba(0, 0, 0, 0.1);
+            border-color: rgba(0, 0, 0, 0.2);
+            color: #000;
         }
         .copy-button:active {
-            background-color: rgba(255, 255, 255, 0.2);
+            background-color: rgba(0, 0, 0, 0.15);
         }
         pre {
             margin: 0;
             white-space: pre-wrap;
             word-wrap: break-word;
+            
         }
         code {
             font-family: monospace;
             font-size: 0.8em;
         }
+        .dark .tab-nav {
+            border-bottom: 1px solid #3e3e42;
+            background-color: #2d2d30;
+        }
+        .dark .tab-link {
+            color: #969696;
+        }
+        .dark .tab-link:hover {
+            background-color: #3e3e42;
+        }
+        .dark .tab-link.active {
+            color: #4a9eff;
+            border-bottom: 3px solid #4a9eff;
+        }
+        .dark .copy-button {
+            background-color: rgba(255, 255, 255, 0.08);
+            border: 1px solid rgba(255, 255, 255, 0.2);
+            color: #f0f0f0;
+        }
+        .dark .copy-button:hover {
+            background-color: rgba(255, 255, 255, 0.15);
+            border-color: rgba(255, 255, 255, 0.3);
+            color: #ffffff;
+        }
+        .dark .copy-button:active {
+            background-color: rgba(255, 255, 255, 0.2);
+        }
+        .dark pre {
+            background-color: #1e1e1e;
+            color: #cccccc;
+        }
+        .dark code {
+            color: #cccccc;
+        }
     `;
-
   let container = originalElement.nextElementSibling;
 
   if (!container || container.id !== "my-code-translator-container") {
@@ -77,13 +112,19 @@ export function injectOrUpdateTranslations(
     const shadowRoot = container.attachShadow({ mode: "open" });
     const prismTheme = document.createElement("link");
     prismTheme.rel = "stylesheet";
-    prismTheme.href = chrome.runtime.getURL("packages/prism.css");
+    if(currentTheme==="dark"){
+      prismTheme.href = chrome.runtime.getURL("packages/prism.css");
+    }else{
+      prismTheme.href = chrome.runtime.getURL("packages/prism-light.css");
+    }
+    
     shadowRoot.appendChild(prismTheme);
     const styleElement = document.createElement("style");
     styleElement.textContent = componentStyles;
     shadowRoot.appendChild(styleElement);
     const uiWrapper = document.createElement("div");
     uiWrapper.className = "ui-wrapper";
+    uiWrapper.classList.add(currentTheme === "dark" ? "dark" : "light");
     shadowRoot.appendChild(uiWrapper);
     originalElement.parentNode.insertBefore(
       container,