.footer {
    text-align: center;
    margin-top: 2rem;
    border-top: 1px solid #efefef;
    padding: 1em 2em 0 2em;
    font-size: 85%;
    color: #999;
}
h1, h2, h3, h4, h5, h6, p {
    margin: 1rem 0;
}
code, pre code {
    color: #e83e8c;
}
pre {
    border-left: 3px solid #BBB;
    padding-left: 1em;
}
.depth-0 { margin-left:   0px; }
.depth-1 { margin-left:  25px; }
.depth-2 { margin-left:  50px; }
.depth-3 { margin-left:  75px; }
.depth-4 { margin-left: 100px; }
.depth-5 { margin-left: 125px; }
.depth-6 { margin-left: 150px; }
.depth-7 { margin-left: 175px; }
.depth-8 { margin-left: 200px; }
.depth-9 { margin-left: 225px; }
.login-box {
    width: 20rem;
}