body {
    font-family: Arial, sans-serif;
}
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 200px;
    height: 100%;
    background-color: #f4f4f4;
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}
#main-doc {
    margin-left: 220px;
    padding: 20px;
}
.nav-link {
    display: block;
    margin: 10px 0;
    color: #333;
    text-decoration: none;
}
.nav-link:hover {
    text-decoration: underline;
}
.main-section {
    margin-bottom: 40px;
}
header {
    font-size: 1.5em;
    margin-bottom: 10px;
}
p {
    margin: 10px 0;
}
ul {
    margin: 10px 0;
    padding-left: 20px;
}
li {
    margin: 5px 0;
}
code {
    display: block;
    background-color: #f4f4f4;
    padding: 10px;
    margin: 10px 0;
    border-left: 3px solid #ccc;
}
footer {
    margin-top: 40px;
    padding: 10px;
    background-color: #f4f4f4;
    text-align: center;
    font-size: 0.9em;
    color: #666;
}