Is it possible for me to customize the login page?
At this time, it is not possible to customize the login popup or page, as opening up this page to full CSS/HTML/JS customization may lead to unintended security concerns. Before we open it up for full customization, we want to ensure that we have accounted for any potential security concerns.
This is a commonly requested feature and we are working hard to provide further customization options. You may subscribe to the following feature request for further information.