Plateau de jeu - Écrire le CSS

[Ruz]

mon html?
<div id="carte"></div>

HTML généré par JS?

Code PHP :

<?php 

<div class="case" style="top: 146.25px; left: 305px; z-index: 11;"><img src="images/S/0.png"></div><div class="case" style="top: 142.25px; left: 276px; z-index: 10;"><img src="images/S/0.png"></div><div class="case" style="top: 127.25px; left: 268px; z-index: 9;"><img src="images/S/0.png"></div><div class="case" style="top: 123.25px; left: 238px; z-index: 8;"><img src="images/S/0.png"></div><div class="case" style="top: 108.25px; left: 231px; z-index: 7;"><img src="images/S/0.png"></div><div class="case" style="top: 104.25px; left: 201px; z-index: 6;"><img src="images/S/0.png"></div><div class="decor" style="top: -39.75px; left: 158.5px; z-index: 10; height: 164px; width: 119px; position: absolute;"><a href="javascript:void(0);" onmouseover="return overlib('<i>arbre feuillu</i><br /><b>Action(s) :</b><ul><ul><li>Couper</li></ul>','44 / 0',FGCOLOR,'#CCCCFF');" onmouseout="return nd();" onclick="return overlib('<i>arbre feuillu</i><br /><b>Action(s) :</b><ul><li><a href=\'javascript:void(0);\' onClick=\'Javascript:do_a(4,8,4,44,0);\'>Couper</a></li></ul>',STICKY, CAPTION,'44 / 0',FGCOLOR,'#CCCCFF');"><img src="images/D/arbre.png"></a></div>