body {
    display: flex;
    flex-direction: column;
    margin: 0;
}

main {
    display: flex;
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

aside#toc {
    width: 25%;
    border-right: 1px solid var(--divider-color);
    padding: 0.5rem;
    overflow-y: auto;
}

article {
    flex: 1;
    padding: 0.5rem;
    overflow-y: auto;
}