Spent a whole day on this thing but I’m pretty proud of it, it’s the first project I’ve actually completed.
Anything I could improve here?
Ok, I see what I need to improve - need to make it more responsive 
any ideas on that?
Cool Machine! 
Try to add Bootstrap to your code Introduction · Bootstrap
You could experiment with using vw instead of em for both font-size and margin.
You could also just define a smaller text size on the body tag depending on the size of the screen.
something like
@media screen and (max-width: 700px) {
body {
font-size: 70%;
}
}
The design is great btw