.content {   
    max-width: 100ch;
    margin: auto;
}

.icon {
    margin-right: 0.5ch;
}

.icon img {
    height: 2em;
}

header h1 {
    display: flex;
    align-items: center;
}

main * {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
    display: block;
    width: 100%;
}

main a {
    display: inline;
}