more optimizations

api/frontend/css/index.css

@@ -0,0 +1,20 @@
+* {
+    transition: 0.3s;
+}
+
+.hidden {
+    transform: scale(0);
+    height: 0;
+    padding: 0;
+    margin: 0;
+    overflow: hidden;
+    opacity: 0;
+}
+
+#save-settings-button {
+    position: fixed;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    margin: 10px;
+}