Huddle Landing Page (Responsive and Functioning Buttons)

This is by far the largest project I've worked on since I started my WebDev journey. All of the buttons are functional and the subscription box in the footer works as well when you type in your email. However, you can't actually subscribe to anything on it because I haven't learned the backend yet and it's also not a real company. The social icons in the footer work as well, but they only take you to your own social media page since this is a fictional company with no social media lol. Please let me know if there's anything I can improve on, I'm open to any and all criticism. Thank you! :)