body {
    background-color: #eee;
    margin: 0;
    font-family: arial, Sans-serif;
}

.container {
    background-color: #fff;
    padding: 40px;
}

header {
    background-color: #4eb5d4;
    min-height: 140px;
}

header, nav {
    padding: 10px;
}

nav {
    background-color: #02645c;
    color: #e8f8ff;
    position: sticky;
    top: 0;
}

nav a:link, nav a:visited {
    color: inherit;
    text-decoration: none;
}

a:link {
    color: #053f3a;
}

a:visited {
    color: #61a7a1;
}

main {
    overflow: auto;
}

footer {
    background-color: #555;
    color: #fff;
    padding: 20px;
    clear: both;
}

h2 {
    margin-top: 30px;
    margin-bottom: 0;
    scroll-margin-top: 50px;
}

.container, .wrapper {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

header img {
    float: left;
    margin-right: 20px;
}

.oikealla {
    float: right;
    margin-left: 15px;
}