a

frontend/css.css

@@ -0,0 +1,25 @@
+body {
+    font-family: Arial, sans-serif;
+    background-color: #f9f9f9;
+    margin: 0;
+    padding: 0;
+}
+
+.pdf-viewer {
+    border: 1px solid #ddd;
+    padding: 10px;
+    background-color: #fff;
+}
+
+button {
+    background-color: #4CAF50;
+    color: white;
+    border: none;
+    padding: 10px;
+    cursor: pointer;
+}
+
+button:disabled {
+    background-color: #ccc;
+    cursor: not-allowed;
+}