.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background: rgba(0,0,0,0.5);
}

.modal-content {
  background: #fff;
  margin: 15% auto;
  padding: 20px;
  width: 70%;
  max-width: 600px;
  position: relative;
  border-radius: 8px;
}

.close {
  position: absolute;
  right: 20px;
  top: 10px;
  font-size: 28px;
  cursor: pointer;
}