body{
    /* centré horizontalement te verticalement*/
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    margin:10px;
}

div.log{
    text-align:center;
    font-size: 30px;
}

table {
    margin-right:auto;
    margin-left:auto;
    /* text-align:center;*/
}

tr{
    /* text-align:center;*/
}

td {
    font-family: sans-serif;
    padding: 10px;
    text-align: center;
}

.btn{
    width:300px;
    font-size:30px;
}


html{
padding: 10px;
background-color: #E0E0E0;
color:#000088;
}