.blue_table table /* Le tableau en lui-même */
{
   margin: auto;               /* center the table */
   border: 4px outset gray ;  /* 3D effect */
   border-collapse: collapse; /* border are not separate */
}
.blue_table th 
{
   border: 1.5px solid black;
   background-color: #DDEEFF;
   color: black;
   font-size: 1.0em;
   font-family: Arial, serif;
}
.blue_table td 
{
   border: 1.0px solid black;
   font-size: 0.8em;
   font-family: serif;
   text-align: center; /*all center*/
   padding: 5px;       /*let space to not tuching the table*/
}
.blue_table caption /* Titre du tableau */
{
   margin: auto; /* center title */
   font-family: Times, serif;
   font-weight: bold;
   font-size: 1.2em;
   color: black;
   background-color : white;
}