/* popup d'aide */
a.popup {position:relative;}
a.popup:hover {background: none; z-index: 1;}
a.popup span {display: none;}
a.popup:hover span {display: block; position: fixed; top: 10px; left: 10px; background: #FFF2C2; padding: 20px; border: 1px solid #000000; color: black; text-align: justify;}