.modal {
  display: none; /* Nascosto di default */
  position: fixed;
  z-index: 1;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background-color: rgba(0,0,0,0.5); /* Sfondo scuro */
}
.modal-content {
  margin: 15% auto;
  padding: 20px;

}
.closeBrasica {
  float: right;
  cursor: pointer;
}
.closeOzono {
  float: right;
  cursor: pointer;
}
.closeBioprod {
  float: right;
  cursor: pointer;
}
.closeTech3d {
  float: right;
  cursor: pointer;
}
.closeArmo {
  float: right;
  cursor: pointer;
}
.closeColors {
  float: right;
  cursor: pointer;
}