body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
}
.chat-container {
    width: 400px;
    height: 600px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}
.chat-messages {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    border-bottom: 1px solid #ddd;
}
.message {
    margin-bottom: 10px;
}
.message-author {
    font-weight: bold;
    color: #333;
}
.message-content {
    margin-left: 5px;
    color: #666;
}
.chat-form {
    display: flex;
    padding: 10px;
    border-top: 1px solid #ddd;
}
.chat-form input {
    flex: 1;
    padding: 8px;
    margin-right: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
}
.chat-form button {
    padding: 8px 12px;
    border: none;
    background-color: #007bff;
    color: white;
    border-radius: 4px;
    cursor: pointer;
}