The width is set to 35%. You could probably just change it to around 300px or so. Look around line 681 in your css and change the width to 300px like this –
.header-image #title,
.header-image #title a,
.header-image #title-area {
display: block;
float: left;
min-height: 120px;
overflow: hidden;
text-indent: -9999px;
width: 300px;
}