A:hover {
  font-weight: bold;
}

A.linknero {
  color: #000000;
}

A.linknero:hover {
  color: #000000;
  font-weight: bold;
}

.tabella_info {
  border: solid #ffff00;
  border-collapse: collapse;
  border-width: 2px 2px 2px 2px;
}