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How to make one column grid in 350px resolution? I've tried to make one column grid in 350px resolutions but the grid stays as it is as in desktop resolution even though I changed it, due to this I had to use flex box. Please help me out..

This is the first time I've used Grid layout, so let me know how can I improve more with the help of grid and I'm not able to handle the background image in smaller resolution as the design image shows. Please help me out........

I've made many errors, neither able to handle the the width of the elements in desktop resolution nor in mobile resolution. Please help me out!

I can't think of any solution other than flexbox, suggest me