body {
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    background-color: antiquewhite;
    margin: 0;

    /* Global Variables */
    --main-width: 40em;
}

header {
    position: sticky;
    top: 0;
    padding: 0.5em;
    background-color: white;
    color: rgb(10, 10, 10);
    font-weight: bold;
    border-bottom: solid rgb(177, 177, 177);
}

header * {
    margin-inline: 0.2em;
    text-decoration: none;
}

header *:hover {
    background-color: rgb(180, 234, 255);
}

.vertical-bar {
    width: 0;
    border-left: solid 2px;
    margin-inline: 0.5em;
}

.flex {
    display: flex;
    align-items: center;
    justify-content: center;
}

main #page {
    color: rgb(110, 40, 10);
    font-size: large;
    margin: 2em;
    max-width: var(--main-width);
}

img {
    --pad: 1em;
    display: block;
    margin: var(--pad);

    max-width: calc(var(--main-width) - 2*var(--pad));
}

.center {
    text-align: center;
}