Left align logo in estate theme

Hello –
I would like to left align my logo (which I have really turned into a banner) for my page. I am comfortable with pasting custom CSS but not so much with writing it. I used the following custom CSS to adjust vertical padding (see below) but the left white space is still there. Ideally I want something that adjusts to various screen sizes where you can always see the logos in the middle but the far parts of the image can get chopped.
Thank you!

/* Vantage Header Padding */

header#masthead .hgroup {

padding-top: 10px !important;

padding-bottom: 10px !important;

}

URL: http://www.teamtenacityfitness.com