help, a blank space on the top of webpage!!

[nintenshop]

hello,

now i face this problem, at the top of my webpage have a black space. can i remove the space?

Here is the url of the mysite

http://www.ninten-shop.com

[yellow1912]

body {
font-family: "Lucida Grande", tahoma, verdana, arial, helvetica, sans-serif;
font-size:73.5%;
margin-top:20px;
}


--> remove the margin

[nintenshop]

thank for your help. it's work!!

still have one question, how to change the menu bar background color? i want it change to red.