.modal {
  display: none; 
  position: fixed; 
  z-index: 1000; 
  padding-top: 60px; 
  left: 0;
  top: 0;
  width: 100%; 
  height: 100%; 
  overflow: auto; 
  background-color: rgba(0,0,0,0.9); 
}

.modal-content {
  margin: auto;
  display: block;
  max-width: 80%;
  max-height: 80%;
  border-radius: 12px;
}

#caption {
  margin: auto;
  text-align: center;
  color: #fff;
  padding: 10px 0;
}

.close {
  position: absolute;
  top: 20px;
  right: 40px;
  color: #fff;
  font-size: 40px;
  font-weight: bold;
  cursor: pointer;
}

.close:hover {
  color: #ff0000;
}