prepare for better integration and testing

css/main.css

@@ -1184,4 +1184,71 @@ h2:has(+ #exam-list:empty),  h2:has(+ #packet-list:empty){
 
 .title-bar-button:hover {
     background-color: darkgray;
+}
+
+/* Sync Status Styles */
+#sync-status {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    font-size: 0.85rem;
+    font-weight: 500;
+    color: rgba(255, 255, 255, 0.85);
+    margin: auto 0.8rem;
+    padding: 0.3rem 0.6rem;
+    border-radius: 4px;
+    background-color: rgba(255, 255, 255, 0.05);
+    transition: background-color 0.3s ease;
+}
+
+.sync-dot {
+    width: 8px;
+    height: 8px;
+    border-radius: 50%;
+    display: inline-block;
+}
+
+.sync-dot.saved {
+    background-color: #4CAF50;
+    box-shadow: 0 0 8px #4CAF50;
+}
+
+.sync-dot.syncing {
+    background-color: #FFC107;
+    box-shadow: 0 0 8px #FFC107;
+    animation: pulse-syncing 1.2s infinite ease-in-out;
+}
+
+.sync-dot.failed {
+    background-color: #F44336;
+    box-shadow: 0 0 8px #F44336;
+    animation: pulse-failed 1s infinite alternate;
+}
+
+.sync-text {
+    letter-spacing: 0.2px;
+}
+
+@keyframes pulse-syncing {
+    0% {
+        transform: scale(0.85);
+        opacity: 0.6;
+    }
+    50% {
+        transform: scale(1.15);
+        opacity: 1;
+    }
+    100% {
+        transform: scale(0.85);
+        opacity: 0.6;
+    }
+}
+
+@keyframes pulse-failed {
+    from {
+        box-shadow: 0 0 4px #F44336;
+    }
+    to {
+        box-shadow: 0 0 12px #F44336;
+    }
 }