.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.4);
}

.modal-content {
  display: none;
  background-color: #fefefe;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
  max-width: 470px;
  border-radius: 5px;
  position: absolute;
  top: 15%;
  left: 10%;
}

.modal-content:nth-child(2) {
  left: 20%;
}

.close-popup {
  color: #aaa;
  float: right;
  font-size: 28px;
}

.close-popup:hover,
.close-popup:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}

.popup-header {
  display: inline-block;
  width: 100%;
}

.popup-title {
  color: #333333;
  font-weight: bold;
  font-size: 24px;
}

.modal-footer {
  padding-top: 15px;
  text-align: right;
}

.modal-footer button {
  margin-left: 10px;
  color: #000;
}

@media (max-width: 768px) and (min-height: 650px) {
  .modal-content {
    margin: 0 auto;
    top: 50%;
    left: 50% !important;
    transform: translate(-50%, -50%);
  }
}