fix(ui): fix minor ui bugs

src/pages/student/Lessons.tsx

@@ -101,12 +101,12 @@ export const Lessons = () => {
               )}
 
               {!lessonLoading && lessons.length > 0 && (
-                <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
+                <div className="grid grid-cols-1 gap-4">
                   {lessons.map((lesson) => (
                     <Card
                       key={lesson.id}
                       onClick={() => handleLessonClick(lesson.id)}
-                      className="py-0 pb-5 rounded-4xl overflow-hidden"
+                      className="py-0  pb-5 rounded-4xl overflow-hidden"
                     >
                       <CardHeader className="w-full py-0 px-0">
                         <img