Hi @cancelei ,

Congratulations! 🎉 You made a great job on this project

Highlights

• Descriptive PR ✔️
• Linters passing ✔️

Optional Suggestions 💡

• While these comments with the [OPTIONAL] prefix won't prevent the approval of this pull request, I strongly recommend taking them into account as they can improve your code. Some of them were missed by the previous reviewer and addressing them will really enhance your application.
• I will suggest having one media query for mobile define rules and after all the other sizes will take the normal properties.

Cheers and Happy coding!👏👏👏

If you have any questions or need clarification on anything, feel free to leave a comment in the pull request thread, and don't forget to tag me so I'll receive the notification.

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Once again, congratulations on completing this project! 🎉

Great progress so far!
Here are a few issues to consider :
The following properties can be replaced with bootstrap classes.
1. Height and width
2. Justify-content: center and justify-content: space-around
3. background-color

Good Luck and Happy Coding 😁

Nice work 👍 Keep up the good work 👍 👍. One thing I would like to call your attention to, is using the same bootstrap class name in your css style sheet. I think it would be better if you don't use the same class name in your css file so as not not to alter some of the bootstrap styling, or what do you think?