body{margin:0; padding:0; font-family:Arial, Helvetica, sans-serif; background:url(img/bg.jpg) no-repeat left top;}

a .menu{ border:5px solid #c2922e; }
a:hover .menu{ border:5px solid #b0acaf; }

.mExtra { display:block; border:5px solid #c2922e; background:#c2922e; color:#fff; height:300px; width:155px; text-decoration:none; }
.mExtra:hover { background:#b0acaf; border:5px solid #b0acaf;}

.box{ margin:200px 0 0 250px; padding:0; }

.retroceder { display:block; padding:5px; width:100px; background:#c2922e; color:#fff; }
.retroceder:hover { background:#b0acaf; }
.toggler{ cursor: pointer; }