Change playlist description text to white

- Changed color from black to white for visibility on dark background
- Text now clearly visible against the background

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: 2 people

assets/css/style.css

@@ -2065,7 +2065,7 @@ body.nav-open {
     text-align: center;
     margin-top: var(--spacing-md);
     font-size: 1.1rem;
-    color: var(--color-black);
+    color: #ffffff;
     font-weight: 600;
 }