html, body {
    margin:0;
    padding:0;
/*    background: url(../images/Fond_ecran.jpg) no-repeat center fixed; */
/*    -webkit-background-size: cover; /* pour anciens Chrome et Safari */
/*    background-size: cover; /* version standardisée */
    width:100%;
    height:100%;
    font-size: 16px;
/*       font-size : 14pt;*/
       }

iframe{
       border:0px solid red;
      }

.centrer {
  text-align: center;
}

.left {
  text-align: left;
}

bb    {
      text-align: left;
      font-family: Comic Sans MS, Comic Sans;
      font-variant: normal;
      text-align: center;
      color:black;
      font-size: 15px; 
      /*font-size: 1vw;*/
      }

.th, .td, .tr {
  padding: 10px;
      border: 2px solid red;
      border-radius: 5px;
      border-collapse: collapse;
}

th_1, td_1, tr_1 {
  border: 0px solid black;
}

.underline {
  text-decoration: underline;
}