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

#container {
    min-height: 100%;
    position: relative;
}

#header {
}

#footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 60px; /* Height of the footer */
    background: #6cf;
}

#container {
    height: 100%;
}

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

main {
    flex-grow: 1;
}

body {
    display: grid;
    grid-template-rows: auto 1fr auto;
}