html {
    background-color: #111;
}
body {
    font-family: geneva, sans-serif;
    width: 70%;
    min-width: 400px;
    max-width: 800px;
    box-sizing: border-box;
    margin: auto;
    background-color: #222;
    padding: 50px;
    color: #fff;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: normal;
}
a {
    color: #0ff;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.columns {
    columns: 200px;
}
.hover-info {
    border-bottom: 1px dotted #777;
    cursor: help;
}
table {
    text-align: left;
    width: 100%;
    border-collapse: collapse;
}
table td, table th {
    padding: 5px;
}
table tr:first-child th {
    border-bottom: 1px solid white;
}
table tr:not(:first-child) th:first-child {
    border-right: 1px solid white;
}