✅ Best Practice Structure for Train Reservation System:

frontend/
├── index.html              # Landing page
├── login.html              # User login
├── register.html           # User registration
├── search-trains.html      # Search available trains
├── booking.html            # Seat selection & booking
├── payment.html            # Payment page
├── confirmation.html       # Booking confirmation
├── my-tickets.html         # View user's bookings
├── admin/
│   ├── dashboard.html      # Admin dashboard
│   ├── manage-trains.html  # Add/edit trains
│   └── bookings.html       # View all bookings
├── css/
│   ├── style.css           # Main stylesheet
│   └── admin.css           # Admin styles
└── js/
    ├── main.js             # Common functions
    ├── booking.js          # Booking logic
    ├── auth.js             # Authentication
    └── admin.js            # Admin functions