html { background-color: #111; margin-top: 50px; }

#social-icons {
    padding-top: 20px
}
#social-icons img {
    height: 18px;
}

#social-icons, #social-icons a {
    color: #fff;
}

#social-icons a {
    background-repeat: no-repeat;
    display: inline-block;
    padding-left: 26px;
    height: 24px;
}

#social-icons a#twitter {
    background-image: url('twitter.png');
}

#social-icons a#mastodon {
    background-image: url('mastodon.png');
}