style.css

body {
    margin-left: 20px;
    margin-right: 20px;

    font-family: 'Lato',sans-serif;
}

h1 {
    font-size: 1.5em;
}

h1.later-header {
    border-top: 1px solid lightgrey;
    padding-top: 30px;
}

.channel-name {
    border-top: 1px solid lightgrey;
    padding-top: 10px;
}

.channel-hash {
    color: grey;
}

.msg-date {
    color: grey;
    font-size: 0.8em;
}

.msg-header {
    margin-bottom: -8px;
}

.username {
    font-weight: bold;
}

.user-mention {
    color: dodgerblue;
}