Ping Coming Soon Page with HTML, CSS and JS, mobile first design

Had an interesting time with this one trying to figure out how to colourize .svg icons and get rid of a pesky red box-shadow Firefox kept adding to the email input field after it was submitted, even if the field was empty. Couldn't quite figure out how to make the logo image fully responsive, the method I used for the dashboard image wouldn't work as I couldn't figure out what to reliably compare the logo size too.

Any and all suggestions for improvement are welcome.