Reorganize sidebar: move schedules under respective sections, minimal styling with bullets/arrows, cyan active color, larger fonts

src/main/java/org/example/se302/controller/MainController.java

@@ -38,18 +38,32 @@ public class MainController {
     @FXML
     private Button scheduleBtn;
 
+    // Sub-menus
     @FXML
-    private VBox scheduleSubMenu;
+    private VBox studentsSubMenu;
 
     @FXML
-    private Button calendarBtn;
+    private VBox coursesSubMenu;
+
+    @FXML
+    private VBox classroomsSubMenu;
+
+    // Sub-menu buttons
+    @FXML
+    private Button studentListBtn;
 
     @FXML
     private Button studentScheduleBtn;
 
+    @FXML
+    private Button courseListBtn;
+
     @FXML
     private Button courseScheduleBtn;
 
+    @FXML
+    private Button classroomListBtn;
+
     @FXML
     private Button classroomScheduleBtn;
 
@@ -61,7 +75,11 @@ public class MainController {
 
     private DataManager dataManager;
     private boolean isDarkMode = false;
-    private boolean scheduleMenuOpen = false;
+
+    // Track which sub-menus are open
+    private boolean studentsMenuOpen = false;
+    private boolean coursesMenuOpen = false;
+    private boolean classroomsMenuOpen = false;
 
     // Cached views
     private Node importView;
@@ -174,43 +192,81 @@ public class MainController {
         showView(importView, importBtn);
     }
 
-    @FXML
-    private void onShowStudents() {
-        showView(studentsView, studentsBtn);
-    }
-
-    @FXML
-    private void onShowCourses() {
-        showView(coursesView, coursesBtn);
-    }
-
-    @FXML
-    private void onShowClassrooms() {
-        showView(classroomsView, classroomsBtn);
-    }
-
     /**
-     * Toggle schedule submenu visibility and show Calendar View by default
+     * Toggle students submenu visibility
      */
     @FXML
-    private void onToggleScheduleMenu() {
+    private void onToggleStudentsMenu() {
-        if (!scheduleMenuOpen) {
+        if (!studentsMenuOpen) {
-            // First time opening - show Calendar View and expand submenu
+            studentsMenuOpen = true;
-            scheduleMenuOpen = true;
+            studentsSubMenu.setVisible(true);
-            scheduleSubMenu.setVisible(true);
+            studentsSubMenu.setManaged(true);
-            scheduleSubMenu.setManaged(true);
+            // Show student list by default when opening
-            showView(calendarView, calendarBtn);
+            showView(studentsView, studentListBtn);
         } else {
-            // Toggle submenu visibility
+            studentsMenuOpen = false;
-            scheduleMenuOpen = false;
+            studentsSubMenu.setVisible(false);
-            scheduleSubMenu.setVisible(false);
+            studentsSubMenu.setManaged(false);
-            scheduleSubMenu.setManaged(false);
         }
     }
 
+    @FXML
+    private void onShowStudents() {
+        showView(studentsView, studentListBtn);
+    }
+
+    /**
+     * Toggle courses submenu visibility
+     */
+    @FXML
+    private void onToggleCoursesMenu() {
+        if (!coursesMenuOpen) {
+            coursesMenuOpen = true;
+            coursesSubMenu.setVisible(true);
+            coursesSubMenu.setManaged(true);
+            // Show course list by default when opening
+            showView(coursesView, courseListBtn);
+        } else {
+            coursesMenuOpen = false;
+            coursesSubMenu.setVisible(false);
+            coursesSubMenu.setManaged(false);
+        }
+    }
+
+    @FXML
+    private void onShowCourses() {
+        showView(coursesView, courseListBtn);
+    }
+
+    /**
+     * Toggle classrooms submenu visibility
+     */
+    @FXML
+    private void onToggleClassroomsMenu() {
+        if (!classroomsMenuOpen) {
+            classroomsMenuOpen = true;
+            classroomsSubMenu.setVisible(true);
+            classroomsSubMenu.setManaged(true);
+            // Show classroom list by default when opening
+            showView(classroomsView, classroomListBtn);
+        } else {
+            classroomsMenuOpen = false;
+            classroomsSubMenu.setVisible(false);
+            classroomsSubMenu.setManaged(false);
+        }
+    }
+
+    @FXML
+    private void onShowClassrooms() {
+        showView(classroomsView, classroomListBtn);
+    }
+
+    /**
+     * Show Calendar View directly when Schedule is clicked
+     */
     @FXML
     private void onShowCalendar() {
-        showView(calendarView, calendarBtn);
+        showView(calendarView, scheduleBtn);
     }
 
     @FXML

src/main/resources/org/example/se302/css/application.css

@@ -622,18 +622,20 @@
 /* ===== Sidebar Navigation ===== */
 .sidebar-button {
     -fx-background-color: transparent;
-    -fx-text-fill: rgba(255, 255, 255, 0.8);
+    -fx-border-color: transparent;
-    -fx-font-size: 13px;
+    -fx-border-width: 0;
-    -fx-font-weight: 600;
+    -fx-text-fill: rgba(255, 255, 255, 0.75);
-    -fx-padding: 12 16;
+    -fx-font-size: 15px;
-    -fx-background-radius: 8;
+    -fx-font-weight: 500;
-    -fx-border-radius: 8;
+    -fx-padding: 10 4;
+    -fx-background-radius: 0;
+    -fx-border-radius: 0;
     -fx-alignment: CENTER_LEFT;
     -fx-cursor: hand;
 }
 
 .sidebar-button:hover {
-    -fx-background-color: rgba(255, 255, 255, 0.1);
+    -fx-background-color: transparent;
     -fx-text-fill: white;
 }
 
@@ -643,33 +645,37 @@
 }
 
 .sidebar-button-active {
-    -fx-background-color: rgba(255, 255, 255, 0.15);
+    -fx-background-color: transparent;
-    -fx-text-fill: white;
+    -fx-text-fill: #5eead4;
-    -fx-border-color: rgba(255, 255, 255, 0.3);
+    -fx-font-weight: 600;
-    -fx-border-width: 0 0 0 3;
+    -fx-border-color: transparent;
+    -fx-border-width: 0;
 }
 
 /* Sidebar Sub-buttons (indented) */
 .sidebar-button-sub {
     -fx-background-color: transparent;
-    -fx-text-fill: rgba(255, 255, 255, 0.7);
+    -fx-border-color: transparent;
-    -fx-font-size: 12px;
+    -fx-border-width: 0;
-    -fx-font-weight: 500;
+    -fx-text-fill: rgba(255, 255, 255, 0.6);
-    -fx-padding: 8 12;
+    -fx-font-size: 13px;
-    -fx-background-radius: 6;
+    -fx-font-weight: 400;
-    -fx-border-radius: 6;
+    -fx-padding: 6 4;
+    -fx-background-radius: 0;
+    -fx-border-radius: 0;
     -fx-alignment: CENTER_LEFT;
     -fx-cursor: hand;
 }
 
 .sidebar-button-sub:hover {
-    -fx-background-color: rgba(255, 255, 255, 0.08);
+    -fx-background-color: transparent;
     -fx-text-fill: white;
 }
 
 .sidebar-button-sub.sidebar-button-active {
-    -fx-background-color: rgba(79, 70, 229, 0.3);
+    -fx-background-color: transparent;
-    -fx-text-fill: white;
+    -fx-text-fill: #5eead4;
-    -fx-border-color: #6366F1;
+    -fx-font-weight: 500;
-    -fx-border-width: 0 0 0 2;
+    -fx-border-color: transparent;
+    -fx-border-width: 0;
 }

src/main/resources/org/example/se302/view/main-view.fxml

@@ -32,36 +32,54 @@
                 <Insets top="10" right="10" bottom="10" left="10"/>
             </padding>
             
-            <Button fx:id="importBtn" text="📁 Import Data" onAction="#onShowImport" 
+            <Button fx:id="importBtn" text="• Import Data" onAction="#onShowImport" 
                     maxWidth="Infinity" styleClass="sidebar-button"/>
             
-            <Button fx:id="studentsBtn" text="👤 Students" onAction="#onShowStudents" 
+            <Button fx:id="studentsBtn" text="• Students" onAction="#onToggleStudentsMenu" 
                     maxWidth="Infinity" styleClass="sidebar-button" disable="true"/>
             
-            <Button fx:id="coursesBtn" text="📚 Courses" onAction="#onShowCourses" 
+            <!-- Students Sub-menu (initially hidden) -->
-                    maxWidth="Infinity" styleClass="sidebar-button" disable="true"/>
+            <VBox fx:id="studentsSubMenu" spacing="2" managed="false" visible="false">
-            
-            <Button fx:id="classroomsBtn" text="🏛️ Classrooms" onAction="#onShowClassrooms" 
-                    maxWidth="Infinity" styleClass="sidebar-button" disable="true"/>
-            
-            <Button fx:id="scheduleBtn" text="📅 Schedule" onAction="#onToggleScheduleMenu" 
-                    maxWidth="Infinity" styleClass="sidebar-button" disable="true"/>
-            
-            <!-- Schedule Sub-menu (initially hidden) -->
-            <VBox fx:id="scheduleSubMenu" spacing="2" managed="false" visible="false">
                 <padding>
                     <Insets left="15"/>
                 </padding>
-                <Button fx:id="calendarBtn" text="📆 Calendar View" onAction="#onShowCalendar" 
+                <Button fx:id="studentListBtn" text="→ Student List" onAction="#onShowStudents" 
                         maxWidth="Infinity" styleClass="sidebar-button-sub"/>
-                <Button fx:id="studentScheduleBtn" text="👤 Student Schedule" onAction="#onShowStudentSchedule" 
+                <Button fx:id="studentScheduleBtn" text="→ Student Schedule" onAction="#onShowStudentSchedule" 
-                        maxWidth="Infinity" styleClass="sidebar-button-sub"/>
-                <Button fx:id="courseScheduleBtn" text="📚 Course Schedule" onAction="#onShowCourseSchedule" 
-                        maxWidth="Infinity" styleClass="sidebar-button-sub"/>
-                <Button fx:id="classroomScheduleBtn" text="🏛️ Classroom Schedule" onAction="#onShowClassroomSchedule" 
                         maxWidth="Infinity" styleClass="sidebar-button-sub"/>
             </VBox>
             
+            <Button fx:id="coursesBtn" text="• Courses" onAction="#onToggleCoursesMenu" 
+                    maxWidth="Infinity" styleClass="sidebar-button" disable="true"/>
+            
+            <!-- Courses Sub-menu (initially hidden) -->
+            <VBox fx:id="coursesSubMenu" spacing="2" managed="false" visible="false">
+                <padding>
+                    <Insets left="15"/>
+                </padding>
+                <Button fx:id="courseListBtn" text="→ Course List" onAction="#onShowCourses" 
+                        maxWidth="Infinity" styleClass="sidebar-button-sub"/>
+                <Button fx:id="courseScheduleBtn" text="→ Course Schedule" onAction="#onShowCourseSchedule" 
+                        maxWidth="Infinity" styleClass="sidebar-button-sub"/>
+            </VBox>
+            
+            <Button fx:id="classroomsBtn" text="• Classrooms" onAction="#onToggleClassroomsMenu" 
+                    maxWidth="Infinity" styleClass="sidebar-button" disable="true"/>
+            
+            <!-- Classrooms Sub-menu (initially hidden) -->
+            <VBox fx:id="classroomsSubMenu" spacing="2" managed="false" visible="false">
+                <padding>
+                    <Insets left="15"/>
+                </padding>
+                <Button fx:id="classroomListBtn" text="→ Classroom List" onAction="#onShowClassrooms" 
+                        maxWidth="Infinity" styleClass="sidebar-button-sub"/>
+                <Button fx:id="classroomScheduleBtn" text="→ Classroom Schedule" onAction="#onShowClassroomSchedule" 
+                        maxWidth="Infinity" styleClass="sidebar-button-sub"/>
+            </VBox>
+            
+            <Button fx:id="scheduleBtn" text="• Schedule" onAction="#onShowCalendar" 
+                    maxWidth="Infinity" styleClass="sidebar-button" disable="true"/>
+            
             <Region VBox.vgrow="ALWAYS"/>
             
             <Label text="Navigation" style="-fx-text-fill: rgba(255,255,255,0.5); -fx-font-size: 10px;"/>