html 
{
    font-size: 90%;
    font-family: Helvetica;
}
thead input {
        width: 100%;
    }
root 
{ 
    display: block;
}
div.centrado
{
    margin: 0 auto;
    text-align: center;
}


#containerLogin
{
   width: 360px;
   margin-top: 10%;
}
#btnIngresar
{
    width: 100%;
}
#center_div
{
  display: table;
  margin: 0 auto;
}