body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #000;
    color: #fff;
}

#chat-container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    border: 1px solid #444;
    background-color: #222;
    padding: 20px;
    border-radius: 8px;
}

#chat-box {
    height: 400px;
    overflow-y: auto;
    border: 1px solid #444;
    padding: 10px;
    margin-bottom: 10px;
    background-color: #333;
    border-radius: 4px;
}

#user-input {
    width: calc(100% - 90px);
    padding: 10px;
    margin-right: 10px;
    border-radius: 4px;
    border: 1px solid #444;
    background-color: #333;
    color: #fff;
}

#send-button {
    width: 80px;
    background-color: #555;
    color: #fff;
    padding: 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#send-button:hover {
    background-color: #666;
}