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I have completed this challenge but face a few issues and still have doubts about it:-

1. how to use padding & margin through bootstrap for mobile layout but i used vallina CSS for desktop layout. is it best practice to use padding & margin in this way or does bootstrap also have responsive P & M too.
2. "arrow down" in social media links. I have used font-awesome icon for that with position absolute.
3. position for social links. i am able to do this through position absolute. Please share your valuable feedback on this challenge. your feedback will help me to understand more about my mistake.