Take a look into this file
templates/icy_phoenix/style_dark.css
Play with this
#top_logo{
background-color: transparent;
height: 135px;
}
#logo-img {
margin-top: 20px;
margin-left: 10px;
}
And remember to change also the width...
Or make you logo smaler. Because it is 1.000px × 140px
You site width is 980px
So you have also to play with this
#global-wrapper {
width: 980px !important;
clear: both;
margin: 0 auto;
}
/* wrapper */
#wrapper {
width: 980px !important;
display: table-cell;
background: #000000 url('./images/dark/bg/bg_b_l.gif') top left repeat-y;
}