Unfortunately, we're not able to provide you with customized CSS solutions. However, the element you're looking for is #branding .branding_wrap. Adding margin-left: -20px; to that helps considerably.
I can point you to use Firebug for Firefox (a free add-on) or, if you prefer Chrome, the built-in Inspection Tool there. Either of these will allow you to point to the element you wish to change and observe the HTML and CSS behind it. You can also modify the CSS in the sandbox (where the CSS shows) to test it. When it appears as you'd like, copy the code directly from the sandbox and paste to Custom Code.
You should know that PlatformPro is now a deprecated product and it might be best to upgrade to PageLines Framework.