body {
  font-family: Arial, sans-serif;
}

.modal {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.8);
}

.modal-content {
  position: relative;
  margin: 10% auto;
  padding: 20px;
  background-color: #fff;
  width: 80%;
  max-width: 800px;
}

.close {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 30px;
  color: #fff;
  cursor: pointer;
}

#imageViewer {
  width: 100%;
  height: auto;
}