html{
    width: 100%;
    height: 100%;
}
body{
    margin: 0px;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-image: url(../img/background.jpg);
    background-repeat: repeat-x;
}
.logo{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 400px;
    height: 295px;
    margin-left: -200px;
    margin-top: -148px;
    background-image: url(../img/logo.png);
    background-repeat: no-repeat;
    background-position: 50% 50%;
}