feat: enhance success animation with scale, random quotes, and persistent border

- Add scale transition (50% → 100%) to crispy badge animation
- Rotate through random encouraging quotes on completion
- Keep gradient border visible after completing a lesson
- Match completion badge gradient colors to glow effect
- Improve bounce animation with elastic bezier curve

src/main.css

@@ -316,7 +316,7 @@ kbd {
 	display: inline-block;
 	margin-left: 0.5rem;
 	padding: 0.15rem 0.5rem;
-	background: var(--success-color);
+	background: linear-gradient(135deg, #9b59b6, #e040fb, #00bcd4, #7c4dff);
 	color: white;
 	font-size: 0.7rem;
 	font-weight: 600;
@@ -525,6 +525,27 @@ kbd {
 	display: flex;
 	flex-direction: column;
 	min-height: 0;
+	position: relative;
+}
+
+/* Glow behind preview-wrapper when matched */
+.preview-section.matched::before {
+	content: "";
+	position: absolute;
+	inset: var(--spacing-md);
+	border-radius: var(--border-radius-md);
+	background: conic-gradient(
+		from var(--border-angle),
+		#9b59b6,
+		#e040fb,
+		#00bcd4,
+		#7c4dff,
+		#9b59b6
+	);
+	filter: blur(30px);
+	opacity: 0;
+	animation: spin-glow 3s ease-out forwards;
+	pointer-events: none;
 }
 
 .preview-header {
@@ -551,6 +572,7 @@ kbd {
 	overflow: hidden;
 	min-height: 0;
 	border: 6px solid transparent;
+	z-index: 1;
 }
 
 .preview-frame {
@@ -604,6 +626,21 @@ kbd {
 	inherits: false;
 }
 
+/* Persistent gradient border for completed lessons */
+.preview-wrapper.completed-glow {
+	border: 6px solid transparent;
+	background:
+		linear-gradient(var(--panel-bg), var(--panel-bg)) padding-box,
+		conic-gradient(
+			from 0deg,
+			#9b59b6,
+			#e040fb,
+			#00bcd4,
+			#7c4dff,
+			#9b59b6
+		) border-box;
+}
+
 .preview-wrapper.matched {
 	--border-angle: 0deg;
 	border: 6px solid transparent;
@@ -621,64 +658,25 @@ kbd {
 	overflow: visible;
 }
 
-/* Colorful glow effect layer on the preview area */
-.preview-wrapper.matched::before {
-	content: "";
-	position: absolute;
-	inset: -12px;
-	border-radius: calc(var(--border-radius-md) + 12px);
-	/* Multi-color gradient glow - works in all browsers */
-	background: linear-gradient(
-		135deg,
-		#9b59b6,
-		#e040fb,
-		#00bcd4,
-		#7c4dff,
-		#9b59b6
-	);
-	z-index: -1;
-	filter: blur(24px);
-	opacity: 0;
-	animation: glow-pulse 3s ease-out forwards;
-	pointer-events: none;
-}
 
-@keyframes glow-pulse {
-	0% {
-		opacity: 0;
-		transform: scale(0.95);
-	}
-	15% {
-		opacity: 0.8;
-		transform: scale(1);
-	}
-	60% {
-		opacity: 0.6;
-	}
-	100% {
-		opacity: 0;
-		transform: scale(1.02);
-	}
-}
-
-/* Animated CRISPY badge (matches logo style) */
+/* Animated CRISPY badge with gradient colors */
 .preview-wrapper.matched::after {
-	content: "Your CODE looks CRISPY!";
+	content: var(--crispy-quote, "Crispyyyyyy!");
 	position: absolute;
 	left: 50%;
-	top: 0;
-	transform: translateX(-50%) translateY(-100%);
+	top: 100%;
+	transform: translateX(-50%) scale(0.5);
 	font-family: system-ui, -apple-system, sans-serif;
 	font-size: 2rem;
 	font-weight: 800;
 	letter-spacing: 0.05em;
 	color: white;
-	background: var(--primary-color);
+	background: linear-gradient(135deg, #9b59b6 0%, #e040fb 50%, #7c4dff 100%);
 	padding: 0.5rem 1.25rem;
 	border-radius: 8px;
 	z-index: 10;
 	pointer-events: none;
-	animation: crispy-fall 3s ease-in-out forwards;
+	animation: crispy-bounce 3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
 	opacity: 0;
 	white-space: nowrap;
 }
@@ -714,26 +712,35 @@ kbd {
 	}
 }
 
-@keyframes crispy-fall {
+@keyframes crispy-bounce {
 	0% {
-		top: 0;
-		transform: translateX(-50%) translateY(-100%);
+		top: 100%;
+		transform: translateX(-50%) translateY(0) scale(0.5);
 		opacity: 0;
 	}
-	15% {
+	20% {
+		top: 45%;
+		transform: translateX(-50%) translateY(-50%) scale(1.1);
 		opacity: 1;
 	}
-	50% {
+	28% {
+		top: 52%;
+		transform: translateX(-50%) translateY(-50%) scale(0.95);
+		opacity: 1;
+	}
+	35% {
 		top: 50%;
-		transform: translateX(-50%) translateY(-50%);
+		transform: translateX(-50%) translateY(-50%) scale(1);
 		opacity: 1;
 	}
-	85% {
+	65% {
+		top: 50%;
+		transform: translateX(-50%) translateY(-50%) scale(1);
 		opacity: 1;
 	}
 	100% {
 		top: 100%;
-		transform: translateX(-50%) translateY(0%);
+		transform: translateX(-50%) translateY(0) scale(0.5);
 		opacity: 0;
 	}
 }