body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f0f0f0;
}

#chat {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#messages {
    height: 400px;
    overflow-y: auto;
    border: 1px solid #ddd;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 5px;
}

.message {
    margin: 10px 0;
    padding: 8px;
    border-radius: 5px;
    background: #e3f2fd;
    max-width: 80%;
}

.message.self {
    background: #c8e6c9;
    margin-left: auto;
}

#messageInput {
    display: flex;
    gap: 10px;
}

#messageInput input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

#messageInput button {
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}