body{
  background-color: #4d4d4d;
}

*#global { 
  position:absolute; 
  left: 50%;  
  top: 50%; 
  width: 480px; 
  height: 270px; 
  margin-top: -135px; /* moitié de la hauteur */ 
  margin-left: -240px; /* moitié de la largeur */ 
}

a:link   { color: #ffffff; font-size: 10px; font-family: "Trebuchet MS", Geneva, Arial, Helvetica, SunSans-Regular, sans-serif; font-weight: bold; text-decoration: none; margin: 5px; padding: 5px }
a:visited { color: #ffffff; font-size: 10px; font-family: "Trebuchet MS", Geneva, Arial, Helvetica, SunSans-Regular, sans-serif; font-weight: bold; text-decoration: none; margin: 5px; padding: 5px }
a:hover   { color: #ffffff; font-size: 10px; font-family: "Trebuchet MS", Geneva, Arial, Helvetica, SunSans-Regular, sans-serif; font-weight: bold; text-decoration: none; margin: 5px; padding: 5px }