Joomla LOGIN Box needs to be in Theme Style

Hi There, I have a Joomla 3.5.1 website, where using the PHOTO theme from Rocket Themes; and I've just had the log-in box fixed, so the user name and forgot password links now work. However, now the Log-In Box is not within the "Theme Style"... Not sure how to make it so. The theme is using Granty 5 - so please respond and help. Need your expertise to get this "Login page" under same style of the rest of the site. I also could use your expertise on a few other minor things. Looking forward to having you help - URGENT. Thank you so much.