Responsive Web Design

User story

As a user, I want the application to be fully responsive and adapt to different devices, including desktop, tablet, and mobile. The layout should adjust accordingly for optimal usability on each device.

Acceptance criteria

• The application's layout adapts responsively for desktop, tablet, and mobile devices.
• On the desktop, the code area and preview are displayed side by side.
• On the tablet, the layout is similar to the desktop but scaled down proportionally.
• On the mobile, only one tab (e.g., HTML or Preview) is visible at a time, and the layout is optimized for vertical scrolling.