.center
{
    text-align: center;
}
.gras
{
    font-weight: 700;
}
.border
{
    border: 1px solid black;
    padding: 5px;
}
.border1
{
    border: 1px solid black;
    padding: 1px;
}
.table
{
    margin: auto;
    border-collapse: collapse;
}
.td
{
    border: 1px solid black;
    padding: 5px;
}
table
{
    margin: auto;
}
td
{
    padding: 5px;
}
.space
{
    white-space: pre;
}