* {
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

.top {
    background: #e0eeee;
}

.center {
    width: 100%;
    height: 100%;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.loke {
    background: url(loke.png) no-repeat center center;
    background-size: auto 50%;
}