body, html {
    margin: 0;
    padding: 0;
    height: 100%;
}

div.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#content {
    flex: 1; /* This makes the main content area grow to fill remaining space */
}

#footer {
    flex-shrink: 0; /* Prevent footer from shrinking */
}

div.page {
    margin-top: 2em;
    margin-left: 2em;
}