Pinboard header size

I’m using the Pinboard theme and there’s A LOT of excess space in the header area around the image that I can’t get rid of. I tried a ton of different css from googling this question and nothing works. Anybody knows what I can do to fix it?

Thx!!

BTW, This is what appears in my css right now:
#site-title {
margin:0;
line-height:0;
float:left;
}
#social-media-icons {
display:none;
float:none;
margin-top:0;
}
#header #searchform {
float:top;
margin-top:0;
}
#header input#s {
display: none;
margin-top:0;
}
#slides {
width: 395px;
}

#slider .wp-post-image, #slider .entry-attachment {
width: 750px;
}

#slider .wp-post-image, #slider .entry-attachment {
height: 400px;
}

#header #searchform {
margin-top:22px;
}

#social-media-icons {
margin-top:22px;
}

#site-title,
#site-description {
line-height:75px;
}