body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
}

h1 {
    color: #4a4a4a;
    margin-bottom: 20px;
}

#chat {
    width: 80%;
    max-width: 600px;
    height: 400px;
    border: 1px solid #ccc;
    padding: 15px;
    overflow-y: auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 10px;
}

#chat p {
    margin: 5px 0;
    line-height: 1.5;
}

#chat p b {
    color: #007bff;
}

#chat p:nth-child(even) {
    background-color: #f9f9f9;
}

#msg {
    width: 65%;
    max-width: 450px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
    margin-right: 10px;
}

button {
    padding: 10px 20px;
    border: none;
    background-color: #28a745;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #218838;
}

@media (max-width: 768px) {
    #chat {
        width: 90%;
        height: 300px;
    }

    #msg {
        width: