* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-size: 18px;
    font-family: "Ubuntu Mono", monospace;
}

html, body {
    height: 100%;
}

body {
    line-height: 1.5;
    background-color: gray;
    overflow-y: scroll;
}

header, nav, main, footer {
    padding: 2px calc((100% -800px)/2) 0;
}

header {
    max-width: 640px;
    margin: 0 auto;
    padding-top: 33px;
    padding-bottom: 27px;
    background-color: white;
    text-align: center;
}

nav {
    padding-top: 17px;
    padding-bottom: 15px;
    height: 60px;
}

main {
    max-width: 640px;
    margin: 54px auto;
    min-height: calc(100vh - 345px);
    overflow: auto;
    background-color: white;
}

h2 {
    margin: 0;
    padding: 10px 0;
}

.metadata {
    
}