change grid layout

[devvsakib]

make 3column for large device

make 2column for medium device

[imtiazpy]

This issue seems unassigned, can I take it? I am willing to work on it. @devvsakib

[devvsakib]

@imtiazpy suree. thanks for contributing

[imtiazpy]

The task is done.
Could you please check @devvsakib

[devvsakib]

@imtiazpy thank you, your pr merged, don't forget to leave a star⭐

[devvsakib]

Closed #48

[imtiazpy]

Glad to contribute. there's another issue I think that needs to be worked on. When the solution button from any card gets clicked it expends that card along all the cards in it's row. It would look good if only the card the button is clicked on gets expended. Or there can be a modal for showing the solution.

[devvsakib]

@imtiazpy sure you can raise an issue and start working on it🎊🎊