# Night Mode Implementation Guide

## Overview
A complete light/night mode toggle has been implemented across the SAT Portal application. Users can switch between themes using the moon/sun icon in the navbar.

## Features

### Theme Toggle
- **Location**: Top navbar, between search and notifications
- **Icons**: 
  - Moon icon 🌙 in light mode (click to switch to night mode)
  - Sun icon ☀️ in night mode (click to switch to light mode)
- **Persistence**: Theme preference is saved to localStorage and persists across sessions

### Color Schemes

#### Light Mode (Original)
- **Navbar**: `rgba(242, 27, 35, 0.95)` (Red)
- **Body**: `#e5e5e5` (Light grey)
- **Cards**: `#ffffff` (White)
- **Text**: `#1a1a1a` / `#4d4d4f` (Dark grey)
- **Accents**: `#f21b23` (Red)

#### Night Mode (New)
- **Navbar**: `#910404e0` (Dark red)
- **Body**: `#2e2c2c` (Dark charcoal)
- **Cards**: `#3a3838` / `#363434` (Dark grey)
- **Text**: `rgba(255, 255, 255, 0.9)` (Light/white)
- **Accents**: `#f87171` / `#fca5a5` (Light red)

## Implementation Details

### 1. Theme Context (`src/contexts/ThemeContext.js`)
Created a React Context to manage theme state globally:
- Provides `theme` (current theme: 'light' or 'night')
- Provides `toggleTheme()` function
- Saves preference to localStorage
- Applies `.light-mode` or `.night-mode` class to `<body>`

### 2. App.js Updates
Wrapped entire application with `<ThemeProvider>`:
```javascript
import { ThemeProvider } from "./contexts/ThemeContext";

function App() {
  return (
    <ThemeProvider>
      <Router>
        {/* routes */}
      </Router>
    </ThemeProvider>
  );
}
```

### 3. Navbar Updates (`src/components/layouts/Navbar.js`)
Added theme toggle button:
- Uses `useTheme()` hook to access theme state
- Shows moon icon in light mode, sun icon in night mode
- Clicking toggles between themes

### 4. CSS Updates

#### Main Dashboard Styles
- **Dashboard.css**: Complete theme support for dashboard container, sections, charts, filters
- **DashboardHeader.css**: Theme support for header, title, subtitle, controls
- **StatCard.css**: Theme support for stat cards (Total Audits, Completion Rate, etc.)

#### Master & Personalized Dashboard
- **MasterDashboard.css**: Base styles remain (night mode by default)
- **MasterDashboardTheme.css**: Light mode overrides added
- **PersonalizedDashboard.css**: Base styles remain (night mode by default)
- Applied to both MasterDashboard.js and PersonalizedDashboard.js

#### Navbar
- **user-create.css**: Theme-specific navbar styles for both modes

### CSS Pattern
All theme-specific styles use class prefixes:
```css
/* Light mode */
.light-mode .component {
  /* light theme styles */
}

/* Night mode */
.night-mode .component {
  /* night theme styles */
}
```

## Files Modified

### New Files
1. `src/contexts/ThemeContext.js` - Theme state management
2. `src/components/features/master-dashboard/styles/MasterDashboardTheme.css` - Light mode overrides
3. `NIGHT_MODE_IMPLEMENTATION.md` - This documentation

### Modified Files
1. `src/App.js` - Added ThemeProvider wrapper
2. `src/components/layouts/Navbar.js` - Added theme toggle button
3. `src/components/features/dashboard/styles/Dashboard.css` - Full rewrite with theme support
4. `src/components/features/dashboard/styles/DashboardHeader.css` - Full rewrite with theme support
5. `src/components/features/dashboard/styles/StatCard.css` - Full rewrite with theme support
6. `src/components/features/master-dashboard/MasterDashboard.js` - Import theme CSS
7. `src/components/features/master-dashboard/PersonalizedDashboard.js` - Import theme CSS
8. `src/styles/user-create.css` - Added theme support for navbar

## How It Works

1. **Initial Load**:
   - ThemeContext checks localStorage for saved theme preference
   - Defaults to 'light' if no preference found
   - Applies appropriate class to `<body>` element

2. **Theme Toggle**:
   - User clicks moon/sun icon in navbar
   - `toggleTheme()` is called
   - Theme state updates ('light' ↔ 'night')
   - Body class updates (`.light-mode` ↔ `.night-mode`)
   - New preference saved to localStorage
   - CSS automatically applies new theme styles

3. **Component Rendering**:
   - Components use themed classes via parent body class
   - No changes needed in component JSX
   - Pure CSS-based theming

## Testing

### Verify Theme Toggle
1. Open application
2. Default should be light mode (red navbar, light background)
3. Click moon icon in navbar
4. Should switch to night mode (dark red navbar, dark background)
5. Refresh page - theme should persist
6. Click sun icon - should switch back to light mode

### Verify All Pages
Test theme toggle on:
- Master Dashboard (/)
- Personalized Dashboard (/personalized-dashboard)
- Regular Dashboard (/dashboard)
- All other pages with navbar

## Browser Support
- Modern browsers (Chrome, Firefox, Safari, Edge)
- CSS custom properties used for theming
- Backdrop filters for navbar blur effect
- LocalStorage for persistence

## Future Enhancements
- System preference detection (prefers-color-scheme)
- Additional themes (e.g., blue theme, green theme)
- Per-component theme customization
- Theme preview before applying
- Smooth transition animations between themes

## Troubleshooting

### Theme Not Persisting
- Check browser localStorage: `localStorage.getItem('sat-theme')`
- Verify ThemeProvider wraps entire app
- Check browser console for errors

### Styles Not Applying
- Verify body has `.light-mode` or `.night-mode` class
- Check CSS specificity (theme classes should be specific enough)
- Clear browser cache and hard reload
- Verify CSS files are imported correctly

### Toggle Button Not Working
- Check Navbar.js imports useTheme hook
- Verify ThemeContext is accessible
- Check browser console for errors
