.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.8);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal.show {
    opacity: 1;
}

.modal-content {
  position: relative;
  margin: auto;
  padding: 20px;
  width: 80%;
  max-width: 700px;
  top: 50%;
  transform: translateY(-50%);
}

.close-button {
  color: #aaaaaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close-button:hover,
.close-button:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}