Base-Apparel-Coming-Soon-Page Using Grid

There are many things that need improvement in my work, I hope you guys can help me. Your suggestion means so much to me. The most challenging part for me in completing this project is validating the email format. I succeeded in showing error messages, but I fail on how to submit a valid email. I also have a problem with the "we're coming soon" text, it overflows the container when the screen size becomes small.