.secure-pdf-popup {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0; top: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
}
.secure-pdf-popup-content {
  background: #fff;
  margin: 10% auto;
  padding: 20px;
  max-width: 400px;
  position: relative;
  border-radius: 8px;
}
.secure-pdf-popup input, .secure-pdf-popup button {
  width: 100%; margin-bottom: 10px; padding: 8px;
}
.close-popup {
  position: absolute; right: 10px; top: 10px;
  cursor: pointer; font-size: 20px;
}