td {
  font-family: Verdana;
  font-size: 9px;
}
table.centro {
  background-color: #66CC00;
  border: 1px solid green;
  color: #FFFFFF;
}
.grande {
  font-size: 15px;
  font-weight: bold;
}
.form {
  width: 95%;
}
img.blanco {
  border: 1px solid white;
}
img.negro {
  border: 1px solid black;
}
img.verde {
  border: 1px solid green;
}