/* Reset some default styles */
body, h1, h2, p, ul, li {
    margin: 0;
    padding: 0;
}

/* Basic styling */
body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px 0;
}

nav ul {
    list-style: none;
    background-color: #333;
    overflow: hidden;
}

nav ul li {
    float: left;
    margin-right: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

nav ul li a:hover {
    text-decoration: underline;
}

.content {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 10px 0;
    background-color: #333;
    color: #fff;
}

/* Additional styling */
.article {
    margin-bottom: 30px;
}

h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

ul {
    list-style-type: disc;
    margin-left: 20px;
}

li {
    margin-bottom: 10px;
}

.sidebar {
    float: right;
    width: 30%;
    background-color: #f0f0f0;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar h2 {
    font-size: 20px;
    margin-bottom: 10px;
}

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

.sidebar ul li {
    margin-bottom: 10px;
}

.sidebar ul li a {
    color: #333;
    text-decoration: none;
}

.chat-box {
    border: 1px solid #ccc;
    height: 300px;
    overflow-y: scroll;
    padding: 10px;
}