body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f4f4f4;
}

header {
    width: 100%;
    background: #333;
    color: white;
    padding: 15px;
    text-align: center;
    display: flex;
    justify-content: space-between;
}

#chat-container {
    width: 90%;
    max-width: 600px;
    background: white;
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

#chat-box {
    height: 300px;
    overflow-y: auto;
    border: 1px solid #ddd;
    padding: 10px;
    margin-bottom: 10px;
}

textarea {
    width: calc(100% - 22px);
    height: 50px;
    padding: 10px;
    resize: none;
}

button {
    width: 100%;
    padding: 10px;
    background: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #0056b3;
}