:root {
    --bgcolor: #e4e4ff;
    --page-width: 50em;
}
html, body {
    margin: 16px;
    line-height: 1.5em;
    background-color: var(--bgcolor);
}
header {
    text-align: center;
}
nav {
    text-align: center;
    margin: 32px 0;
}
nav ul {
    list-style-type: none;
    padding-left: 0;
}
nav ul li {
    display: inline-block;
    padding: 4px;
}
footer {
    display: flex;
    justify-content: center;
    font-size: 0.9em;
}
article h2 { margin: 16px 0; }
article {
    background-color: white;
    padding: 16px;
}
main article {
    margin: auto auto;
    max-width: var(--page-width);
    border-radius: 8px;
    margin-bottom: 32px;
}
main  article:last-child {
    margin-bottom: none;
}
.transflag {
    width: 90px;
    height: 60px;
    margin: 16px auto;
}