header.banner {
    display: flex;
    align-items: center;
}

header.banner .brand {
    display: flex;
    align-items: center;
    max-width: 40%;
}

header.banner .brand img {
    transition: filter 1s;
}
header.banner .brand h1 {
    transition: color 1s;
}
header.banner .brand:hover img {
    filter: brightness(100%) sepia(100%);
}
header.banner .brand:hover h1 {
    color: #d82;
}

.brand h1 {
    margin: 0;
}

.brand img {
    height: 3em;
    filter: brightness(0%);
}

nav {
    flex: 1;
}

nav ol {
    display: flex;
    flex-wrap: wrap;
    padding-left: 0;
    text-align: center;
    list-style-type: none;
}

nav ol li {
    flex: 1;
}

header.social {
    float: right;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.social img {
    width: 2em;
    margin-top: 0.5em;
    margin-bottom: 0.5em;
}

.contact {
    /* Ideally should be just: */
    /* writing-mode: sideways-lr; */
    /* but of course We Can't Have Nice Things. */
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    margin: 0;
    margin-inline-start: 0.5em;
}


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

.main {
    background: #f00;
}

footer {
    margin: auto;
}