body {
    background-color: #f5f5f5;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #007bff;
    color: #fff;
    padding: 20px;
    text-align: center;
}

h1 {
    margin: 0;
    font-size: 32px;
}

nav {
    background-color: #f8f9fa;
    padding: 10px;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    text-align: center;
}

nav ul li {
    display: inline;
    margin-right: 20px;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}

main {
    padding: 20px;
}

section {
    background-color: #fff;
    border-radius: 5px;
    padding: 20px;
    margin-bottom: 20px;
}

h2 {
    margin-top: 0;
    color: #007bff;
}

article {
    border-bottom: 1px solid #ccc;
    padding-bottom: 20px;
    margin-bottom: 20px;
}

article:last-child {
    border-bottom: none;
}

h3 {
    margin-top: 0;
    color: #333;
}

p {
    color: #666;
}

footer {
    background-color: #007bff;
    color: #fff;
    text-align: center;
    padding: 20px;
}

/* Chat container styles */
#chat-container {
    width: 300px;
    height: 400px;
    border: 1px solid #4853b4;
    border-radius: 5px;
    overflow-y: auto;
    margin: 50px auto;
    padding: 10px;
    background-color: #df8cd4;
}

/* Chat message styles */
#chat-messages {
    margin-bottom: 10px;
}

/* User input styles */
#user-input {
    width: calc(100% - 70px);
    padding: 8px;
    margin-right: 5px;
    border: 1px solid #5ab995;
    border-radius: 5px;
}

/* Send button styles */
#send-button {
    padding: 8px 15px;
    border: none;
    border-radius: 5px;
    background-color: #007bff;
    color: #f0ebef;
    cursor: pointer;
}

/* Send button hover effect */
#send-button:hover {
    background-color: #0056b3;
}