body {
background-color: #83eecc;
margin: 0;
font-family: arial, sans-serif;
}
.wrapper, .container {
max-width: 600px;
margin-left: auto;
margin-right: auto;
}
.container {
background-color: #dafff3;
padding: 40px;
}
header, nav, footer {
    padding: 10px;
}
header {
background-color: paleturquoise;
min-height: 135px;
}
nav {
background-color: #1e8061;
color: #fff;
position: sticky;
top: 0;
}
nav a:link, nav a:visited {
    color: inherit;
    text-decoration: none;
}
a:link {
    color: #1100ff;
}
a:visited {
    color: #a30000;
}

/* Tämä saa main-elementin venymään myös float-kuvista. */
main {
    overflow: auto;
}
footer {
background-color: black;
color: white;
padding: 30px;
}
h1 {
    font-size: 40px;
    color: #454545;
}
h2 {
    margin-top: 25px;
    margin-bottom: 0;
    scroll-margin-top: 50px;
    color: #454545;
}

header img {
    float: left;
    margin-right: 20px;
}
.oikealla {
    float: right;
    margin-left: 15px;
}