feat: Enhance UI with improved dark mode styling and color palette adjustments across course pages.

web/studio/src/app/globals.css

@@ -10,8 +10,8 @@
   --accent-primary: #3b82f6;
   --accent-secondary: #6366f1;
 
-  --glass-bg: rgba(255, 255, 255, 0.8);
-  --glass-border: rgba(0, 0, 0, 0.15);
+  --glass-bg: rgba(255, 255, 255, 0.7);
+  --glass-border: rgba(0, 0, 0, 0.08);
   --glass-blur: blur(16px);
 }
 
@@ -54,7 +54,11 @@ body {
 .btn-premium {
   @apply relative px-6 py-2.5 rounded-xl font-bold transition-all duration-300;
   background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
-  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
+  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.15);
+}
+
+.dark .btn-premium {
+  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
 }
 
 .btn-premium:hover {
@@ -91,7 +95,7 @@ body {
 
 /* Custom Scrollbar */
 ::-webkit-scrollbar {
-  width: 6px;
+  width: 8px;
 }
 
 ::-webkit-scrollbar-track {
@@ -99,10 +103,21 @@ body {
 }
 
 ::-webkit-scrollbar-thumb {
-  background: rgba(255, 255, 255, 0.1);
+  background: rgba(0, 0, 0, 0.1);
   border-radius: 10px;
+  border: 2px solid transparent;
+  background-clip: content-box;
+}
+
+.dark ::-webkit-scrollbar-thumb {
+  background: rgba(255, 255, 255, 0.1);
 }
 
 ::-webkit-scrollbar-thumb:hover {
+  background: rgba(0, 0, 0, 0.2);
+  background-clip: content-box;
+}
+
+.dark ::-webkit-scrollbar-thumb:hover {
   background: rgba(255, 255, 255, 0.2);
 }