diff --git a/web/screens/Thread/ThreadCenterPanel/SimpleTextMessage/index.tsx b/web/screens/Thread/ThreadCenterPanel/SimpleTextMessage/index.tsx
index 26e4659e8a..cc5bad60e3 100644
--- a/web/screens/Thread/ThreadCenterPanel/SimpleTextMessage/index.tsx
+++ b/web/screens/Thread/ThreadCenterPanel/SimpleTextMessage/index.tsx
@@ -104,7 +104,9 @@ const SimpleTextMessage: React.FC<ThreadMessage> = (props) => {
             ''
           )
 
-          if (!language) return node
+          if (extractCodeLines(node) === '') {
+            return node
+          }
 
           return {
             type: 'element',
@@ -145,7 +147,7 @@ const SimpleTextMessage: React.FC<ThreadMessage> = (props) => {
                             type: 'text',
                             value: language
                               ? `${getLanguageFromExtension(language)}`
-                              : 'No file name',
+                              : '',
                           },
                         ],
                       },
diff --git a/web/styles/components/code-block.scss b/web/styles/components/code-block.scss
index e739e4e24a..b94ca97ecb 100644
--- a/web/styles/components/code-block.scss
+++ b/web/styles/components/code-block.scss
@@ -55,7 +55,6 @@
 .hljs {
   overflow: auto;
   display: block;
-  padding: 16px;
   font-size: 14px;
   border-bottom-left-radius: 0.4rem;
   border-bottom-right-radius: 0.4rem;
@@ -65,15 +64,16 @@
 pre {
   background: hsla(var(--app-code-block));
   overflow: auto;
-  padding: 8px 16px;
+
   border-radius: 0.4rem;
 }
 pre > code {
-  text-indent: 0;
   white-space: pre;
   font-size: 14px;
   overflow: auto;
   color: #f8f8f2;
+  display: block;
+  padding: 16px;
 }
 
 .hljs-emphasis {
@@ -155,12 +155,11 @@ span.code-line {
 
 .numbered-code-line::before {
   content: attr(data-line-number);
-
-  margin-left: -8px;
+  margin-left: -4px;
   margin-right: 16px;
-  width: 1rem;
+  width: 1.2rem;
   font-size: 12px;
-  color: var(--color-text-weak);
+  color: hsla(var(--text-tertiary));
   text-align: right;
 
   display: inline-block;