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hi. this is my first time doing this challenge using Bootstrap Grid system and media query for responsive web design. feels free to comment on my solution. after a few weeks of learning html, css, and bootstrap. my next focus is to learn Javascript. Thanks and wish me luck.

i'm not actually sure about some flex properties such as justify-content, align-item, align-content. also i don't know a thing about media query, didn't learn it yet. forgive me if you saw so many unnecessery things inside of it >_<