body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
}

header {
    text-align: center;
    margin-bottom: 20px;
    background-color: #333;
    color: white;
    padding: 10px 0;
}

.container {
    display: flex;
}

.sidebar {
    width: 20%;
    background: #333;
    color: #fff;
    padding: 15px;
    height: 100vh;
    position: fixed;
}

.sidebar h3 {
    text-align: center;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin: 15px 0;
}

.sidebar ul li a {
    color: #fff;
    text-decoration: none;
    display: block;
}

.sidebar ul li a:hover {
    background: #575757;
    padding-left: 10px;
}

main {
    width: 75%;
    margin-left: 25%;
    padding: 20px;
    background: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

pre {
    background: #272822;
    color: #f8f8f2;
    padding: 15px;
    border-radius: 5px;
    overflow: auto;
}

footer {
    text-align: center;
    margin-top: 20px;
    background-color: #333;
    color: white;
    padding: 10px 0;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.javascript {
    color: #66d9ef;
}

.python {
    color: #a6e22e;
}

.http {
    color: #e6db74;
}

.json {
    color: #f92672;
}