body {
    margin: 0;
    display: grid;
    grid-template-areas: 
        "header"
        "content"
        "footer";
    grid-template-rows: auto 1fr auto;
    min-height: 100vh;
}

.content {
    grid-area: content;

    font-family: "Source Serif 4", serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
    line-height: 35px;
    font-size: 20px;

    display: grid;
    align-content: center;
    justify-content: center;
}

.content .year {
    font-size: 60px;
}

.content .when {
    font-size: 16px;
    color: gray;
}

footer {
    grid-area: footer;
    font-size: 14px;
    font-family: 'Arimo', sans-serif;
    color: gray;
    height: 100px;

    display: grid;
    align-content: center;
    text-align: center;
}

.spacer {
    height: 100px;
}

.copyright {
    height: 25px;
}