Need Help with Responsive Web Design Projects - Build a Personal Portfolio Webpage PLEASE

Hey guys, I need help. I’m doing Responsive Web Design Projects - Build a Personal Portfolio Webpage. Here’s a link to the full page,
https://codepen.io/officialsn/full/jObGQGy, and my code, https://codepen.io/officialsn/pen/jObGQGy.
My problem is with my header. Does anyone know how to close the gap between my name and “Front-End Developer”?
Please help. Been working for so long trying to figure it out. Thank you!

have a play about with your margins for your H1 or your paragraph