Apart from the look of the login page, we also enhanced the password reset and login experience for Marketing Cloud recently. Instead of contacting Salesforce, unlock your account by clicking the “Forgot Your Password?” link. While resetting your password, we don't lock your account for entering too many incorrect security codes. Instead, if you repeatedly enter 10 incorrect security codes, we invalidate all available security codes. You need to request a new security code to complete the password reset process.
Additionally, we don't lock your account for entering incorrect answers to your security questions. If you forget the answer to your security answers, contact your Marketing Cloud administrator to receive a new temporary password.