.ai-tutor-widget {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 15px;
    background: #f9f9f9;
    max-width: 500px;
    margin: 20px auto;
}
.ai-tutor-messages {
    height: 300px;
    overflow-y: auto;
    margin-bottom: 10px;
    border-bottom: 1px solid #eee;
}
.user-message { text-align: right; color: #0066cc; }
.ai-message { text-align: left; color: #333; }