Create style.css

style.css

@@ -0,0 +1,28 @@
+#left-panel {
+    height: 90%;
+    overflow-y: auto;
+    border-right: 1px solid #ccc;
+}
+
+#right-panel {
+    height: 90%;
+    overflow-y: auto;
+}
+
+#combine-button {
+    position: absolute;
+    bottom: 10px;
+    left: 10px;
+    width: calc(100% - 20px);
+    background-color: orange;
+    color: white;
+}
+
+#download-zip {
+    position: absolute;
+    bottom: 10px;
+    right: 10px;
+    width: calc(100% - 20px);
+    background-color: blue;
+    color: white;
+}