* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
}

body {
    background-color: #333;

    line-height: 1.4;
    font-size: 20px;
    font-family: Helvetica, sans-serif;
    color: #eee;
}

main {
    height: 91%;
    overflow-y: auto;

    padding: 4% 6% 5% 6%;
}

h1 {
    text-align: center;
    font-size: 30px;
    font-weight: bold;
}

a {
    color: #6060ff;
}

a:visited {
    color: #af30ff;
}

ul {
    padding: 2%;
    list-style-position: inside;
}


section {
    padding: 3%;
}


footer {
    height: 9%;
    overflow-x: auto;

    padding: 0 2%;
    vertical-align: center;

    background-color: #0008;

    position: relative;
}

footer > div {
    position: absolute;
    top: 0;
    bottom: 0;
    height: 20px;
    margin: auto;
}

@media (max-width: 600px) {
    footer > div {
        height: 50px;
    }
}