* {
    margin: 0;
    scrollbar-gutter: stable both-edges;
}

body {
    display: table;
    font-family: sans-serif;
    font-size: 20px;
    margin: auto;
    -webkit-font-smoothing: antialiased;
    line-height: 1.3;
}

a {
    text-decoration: none;
}

a:hover,
a:focus {
    text-decoration: underline;
}

center, p, ul {
    margin-top: 15px;
}

li::marker {
    color: #D0D0D0;
    margin-left: 20px;
}

pre font {
    font-size: 18px;
}

ul {
    margin-left: 10px;
}

.content > p:first-child {
    margin-top: 0;
}

.heading font {
    font-size: 28px;
}

.hrule {
    height: 2px;
}

.hspace {
    width: 20px;
}

.hspace2 {
    width: 40px;
}

.page {
    border-radius: 15px;
    border-spacing: 20px;
    width: 800px;
}

.pre {
    padding: 20px;
}

.vspace {
    height: 15px;
}