body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
}

.chat-container {
    width: 400px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    background-color: white;
    overflow: hidden;
}

.chat-header {
    background-color: #007bff;
    padding: 10px;
    color: white;
    text-align: center;
}

.chat-box {
    height: 300px;
    padding: 10px;
    overflow-y: scroll;
    border-bottom: 1px solid #ccc;
}

.chat-input-container {
    display: flex;
    padding: 10px;
}

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

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

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