:root {
    --font-serif: "Times New Roman", Times, serif;
    --font-mono: "Consolas", "Monaco", monospace;
}

body {
    font-family: var(--font-serif);
    font-size: 16px;
    line-height: 1.6;
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem;
}

h1 {
    border-bottom: 2px solid #333;
    padding-bottom: 0.5rem;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav li {
    margin: 0.5rem 0;
}

a {
    color: #0066cc;
}

a:visited {
    color: #551a8b;
}

pre, code {
    font-family: var(--font-mono);
    background: #f5f5f5;
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

pre {
    padding: 1rem;
    overflow-x: auto;
    white-space: pre-wrap;
}

pre code {
    padding: 0;
    background: none;
}

.details {
    display: none;
    margin-left: 1rem;
    border-left: 3px solid #ddd;
    padding-left: 1rem;
}

li:target > .details,
li.expanded > .details {
    display: block;
}

li > ul {
    display: none;
}

li:target > ul,
li.expanded > ul {
    display: block;
}

.controls {
    margin-bottom: 1rem;
}

.controls a {
    margin-right: 1rem;
    cursor: pointer;
}

hr {
    border: none;
    border-top: 1px solid #ccc;
    margin: 1rem 0;
}

table {
    border-collapse: collapse;
    margin: 1rem 0;
}

th, td {
    border: 1px solid #ccc;
    padding: 0.5rem;
    text-align: left;
}

th {
    background: #f5f5f5;
}

.indent {
    margin-left: 2rem;
}

.indent-2 {
    margin-left: 4rem;
}

.indent-3 {
    margin-left: 6rem;
}