body{font-family:Source Sans Pro,sans-serif;background-color:#f0f0f0;color:#333;margin:0;padding:20px}#app a{display:inline-block;padding:10px 20px;margin:5px;background-color:#007bff;color:#fff;text-decoration:none;border-radius:5px;font-weight:700;transition:background-color .3s ease}#app a:hover{background-color:#0056b3}