diff --git a/src/app.js b/src/app.js
index 968c617..1263ee6 100644
--- a/src/app.js
+++ b/src/app.js
@@ -539,6 +539,7 @@ function resetSuccessIndicators() {
 	elements.previewWrapper?.classList.remove("matched");
 	elements.previewWrapper?.classList.remove("completed-glow");
 	elements.previewSection?.classList.remove("matched");
+	elements.previewSection?.classList.remove("completed-glow");
 
 	// Remove completion badge if present
 	const badge = document.querySelector(".completion-badge");
@@ -661,8 +662,9 @@ function loadCurrentLesson() {
 			elements.lessonTitleRow.appendChild(badge);
 		}
 
-		// Show gradient border for completed lessons
+		// Show gradient border and glow for completed lessons
 		elements.previewWrapper?.classList.add("completed-glow");
+		elements.previewSection?.classList.add("completed-glow");
 	} else {
 		elements.runBtn.querySelector("span").textContent = t("run");
 
@@ -670,6 +672,7 @@ function loadCurrentLesson() {
 		const badge = document.querySelector(".completion-badge");
 		if (badge) badge.remove();
 		elements.previewWrapper?.classList.remove("completed-glow");
+		elements.previewSection?.classList.remove("completed-glow");
 	}
 
 	// Update level indicator (hide in playground mode)
@@ -932,8 +935,9 @@ function runCode() {
 		state.animationTimeout = setTimeout(() => {
 			elements.previewWrapper?.classList.remove("matched");
 			elements.previewSection?.classList.remove("matched");
-			// Keep the gradient border visible after animation
+			// Keep the gradient border and glow visible after animation
 			elements.previewWrapper?.classList.add("completed-glow");
+			elements.previewSection?.classList.add("completed-glow");
 			state.animationTimeout = null;
 		}, 3500);
 
diff --git a/src/auth.js b/src/auth.js
index b27495b..a6e0586 100644
--- a/src/auth.js
+++ b/src/auth.js
@@ -1,5 +1,12 @@
 import { t, applyTranslations } from "./i18n.js";
 
+// Analytics tracking helper
+function track(eventName, eventData = {}) {
+  if (typeof umami !== "undefined" && umami.track) {
+    umami.track(eventName, eventData);
+  }
+}
+
 let currentUser = null;
 let oauthHandled = false;
 let lessonEngineRef = null;
@@ -40,6 +47,8 @@ export async function handleOAuthCallback() {
 
       if (!error && data?.session) {
         oauthHandled = true;
+        const provider = data.session.user?.app_metadata?.provider || "oauth";
+        track("auth_login", { method: provider });
       }
     }
 
diff --git a/src/main.css b/src/main.css
index d409ce6..b4716ab 100644
--- a/src/main.css
+++ b/src/main.css
@@ -662,6 +662,18 @@ kbd {
 	pointer-events: none;
 }
 
+/* Persistent glow for completed lessons */
+.preview-section.completed-glow::before {
+	content: "";
+	position: absolute;
+	inset: var(--spacing-md);
+	border-radius: var(--border-radius-md);
+	background: conic-gradient(from 0deg, #9163b8, #d45aa0, #1aafb8, #7c4dff, #9163b8);
+	filter: blur(30px);
+	opacity: 0.35;
+	pointer-events: none;
+}
+
 .preview-header {
 	display: flex;
 	justify-content: space-between;
@@ -813,7 +825,7 @@ kbd {
 	}
 	100% {
 		--border-angle: -360deg;
-		opacity: 0;
+		opacity: 0.35;
 	}
 }