You can customize the look of your login screen by adding custom CSS in your account settings.
Go to Account > Account Settings

Add login CSS > Update

Updated Jun 28, 2018
You can customize the look of your login screen by adding custom CSS in your account settings.
@Harrison - I don't have any examples. If there are specific changes you want to make I suggest hiring a CSS freelancer to make some modifications for you. You can usually find someone on various freelance sites that can make some basic changes without it costing too much.
Do you have any custom CSS examples for the login screen? We're looking to improve the look/feel of it but I don't have a lot of experience with CSS.