The background is looking great!
To change the size of the Title/Logo area, take a look around line 1203 in your style.css file –
/* Title Area
--------------------------------------------- */
.title-area {
float: left;
padding: 25px 0;
width: 360px;
}
You can also search for it directly using ctrl + F (PC) or Command + F (Mac)
Let me know if that works
