Look in template.css
here you can set the margins and height
h1.logo, h1.logo-text {
font-size: 300%;
margin-bottom: 0px;
margin-left: 0px;
margin-right: 0px;
margin-top: 0px;
padding-bottom: 0px;
padding-left: 0px;
padding-right: 0px;
padding-top: 0px;
}
and if needed – one more CSS class to adjust logo’s style
h1.logo a {
background-attachment: scroll;
background-color: transparent;
background-image: url("http://templates.joomlart.com/ja_teline_ii/templates/ja_teline_ii/images/logo.gif");
background-position: 0% 0%;
background-repeat: no-repeat;
display: block;
height: 42px;
left: 0px;
position: absolute;
top: 20px;
width: 278px;
}