body {
    display: flex;
    flex-direction: row;
    margin: 0;
    font-family: Arial, sans-serif;
}

#navbar {
    width: 200px;
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    background-color: #333;
    color: white;
    padding: 10px;
    overflow-y: auto;
}

#navbar header {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.nav-link {
    display: block;
        color: white;
        text-decoration: none;
        margin-bottom: 10px;
        padding: 5px;
}

.nav-link:hover {
    background-color: #575757;
}

#main-doc {
    margin-left: 220px;
    padding: 20px;
    width: calc(100% - 220px);
}

.main-section {
    margin-bottom: 20px;
}

header {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

code {
    display: block;
    background-color: #f4f4f4;
    padding: 5px;
    margin: 10px 0;
}

ul {
    list-style-type: none;
}

ul li {
    margin: 5px 0;
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    #navbar {
        width: 100%;
        position: relative;
        height: auto;
        display: flex;
        flex-direction: row;
        justify-content: space-evenly;
    }

    #main-doc {
        margin-left: 0;
    }
}