body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f9;
    color: #333;
    transition: background-color 0.3s, color 0.3s;
}

h1 {
    margin-top: 20px;
}

.chat-container {
    margin: 20px auto;
    width: 60%;
}

textarea {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
    margin-bottom: 10px;
}

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

button:hover {
    background-color: #0056b3;
}

.chat-box {
    margin: 20px auto;
    width: 60%;
    padding: 10px;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: left;
    max-height: 400px;
    overflow-y: auto;
}

.message {
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
}

.user-message {
    background-color: #d1e7dd;
}

.bot-message {
    background-color: #f8d7da;
}

.theme-toggle {
    margin: 10px 0;
}

.dark-mode {
    background-color: #121212;
    color: #e1e1e1;
}

.dark-mode .chat-box {
    background-color: #1e1e1e;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.dark-mode .user-message {
    background-color: #2e3b4e;
}

.dark-mode .bot-message {
    background-color: #593c3c;
}

.dark-mode button {
    background-color: #0056b3;
}

.dark-mode button:hover {
    background-color: #003f7f;
}