html {
    font-family: sans-serif;
}

header {
    font-weight: bold;
    text-align: center;
}

body {
    display: flex;
    height: 100vh;
    flex-direction: column;
    box-sizing: border-box;
    margin: 0;
    padding: 8px;
}

#body {
    flex: 1;
}

footer {
    text-align: center;
    font-size: 0.7em;
    font-weight: bold;
}