* {
    background-color: black;
    color: white;
}
body{
    max-width: 40em;
    margin: .5in auto;
    font-size: 18px;
    font-family: serif;
    line-height: 1.5;
    text-align: justify;
}
h1, h2, h3{
    border-bottom: 1px solid grey;
    font-family: Helvetica;
}
pre {
    padding-left: 1em;
    line-height: 1.5em;
    border-left: 5px solid #efefef;
    color: greenyellow;
    overflow-wrap: break-word; white-space: pre-wrap;
}

img{
    max-width: 100%;
}

a{
    color:#1a6e8e;
}

a:visited{
    color: #551A8B; 
}

.pages a{
    margin-right: 1em;
}

.footer{
    border-top: 1px solid grey;
}

.footer ol{
    list-style: none;
    padding-left: 0;
}