Major Enhancement - Responsiveness for Three Device Compatibility

[GoodGameRuler]

Change code and implement a basic responsive (to be revised later) design for three types of devices

• The general laptop (this is pertinent to Major Enhancement - Responsiveness General #46 and not this issue),
• The general mobile device
• An intermediate tablet/medium sized device.

This may involve introducing a hamburger bar or a smaller sidebar. We'll leave the implementation details to you. However, they may be modified at a later point.

[github-actions]

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