.button-ai { background-color: #3498db; color: white; padding: 10px 20px; font-size: 16px; border: none; border-radius: 5px; cursor: pointer; }
.button-ai:hover { background-color: #2980b9; }
.button-ai:active { background-color: #1f618d; }
.button-ai:focus { outline: none; }