Google is redesigning its Gmail Sign-in/Login pages, the new designs can be seen when you login to your Gmail account, you might have to wait a bit as these changes are still rolling out. The newer Sign-in authentication pages are cleaner and pleasant to the eyes. You can compare the older sign-in pages with newer sign-in pages from the images below.
Older Gmail sign-in page:
New Gmail sign-in page:
So do you like the subtle changes in the Google Sign-in pages?