body {
    background-color: #f0f2f5;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.chat-container {
    width: 100%;
    max-width: 600px;
    min-width: 300px;
    height: 500px;
    background: #fff;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

.chat-header {
    text-align: center;
    padding: 10px;
    font-weight: bold;
    border-bottom: 1px solid #ddd;
}

.chat-body {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
}

.message {
    margin-bottom: 10px;
}

.user {
    text-align: right;
}

.bot {
    text-align: left;
    color: #555;
}

.chat-footer {
    display: flex;
    padding: 10px;
    border-top: 1px solid #ddd;
}

.chat-footer input[type="text"] {
    flex: 1;
    padding: 8px;
    margin: 0 5px;
}

.chat-footer button {
    cursor: pointer;
    font-size: 16px;
}