html {
    color: #444;
    font-size: 100%;
    font-family: Verdana, Arial,'Noto Sans', Roboto, Helvetica, sans-serif;
}
h1, h2, h3 {
    color: #666;
}
h1 {
    font-size: 2.0em;
}
h2 {
    font-size: 1.6em;
}
h3 {
    font-size: 1.2em;
}
a:link, a:visited {
    color: steelblue;
}
table {
    border-collapse: collapse;
}
td {
    border: solid 1px #ccc;
    padding: 0.2em;
}
.td-online {
    color: black;
}
.td-offline {
    color: silver;
}