Update frontend/src/App.css

frontend/src/App.css

@@ -160,6 +160,42 @@
   height: 20px; 
   fill: #ffffff; 
 }
+
+.message-content h1, .message-content h2, .message-content h3 {
+  font-weight: bold;
+  margin: 0.8em 0 0.2em 0;
+}
+
+.message-content h1 {
+  font-size: 1.5em;
+}
+
+.message-content h2 {
+  font-size: 1.3em;
+}
+
+.message-content h3 {
+  font-size: 1.1em;
+}
+
+.message-content ul, .message-content ol {
+  padding-left: 20px;
+  margin: 0.5em 0;
+}
+
+.message-content code {
+  background-color: rgba(0, 0, 0, 0.1);
+  padding: 0.1em 0.2em;
+  border-radius: 3px;
+  font-family: monospace;
+}
+
+.message-content blockquote {
+  border-left: 3px solid #ccc;
+  margin-left: 5px;
+  padding-left: 10px;
+  color: #777;
+}
 /* ----- Header du chat ----- */
 .chat-header {
   display: flex;