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

#flex-container {
    display: flex;
    flex-direction: column;
    /* fallback height */
    min-height: 100vh;
    /* new small viewport height for modern browsers
    min-height: 100svh; */
}

    #flex-container > footer {
        margin-top: auto;
    }