.modal {
  /* This way it could be display flex or grid or whatever also. */
  display: block;
  
  /* Probably need media queries here */
  width: 600px;
  max-width: 100%;
  
  height: 300px;
  max-height: 100%;
  
  position: fixed;
  
  z-index: 1000;
  
  left: 50%;
  top: 50%;
  
  /* Use this for centering if unknown width/height */
  transform: translate(-50%, -50%);
  
  /* If known, negative margins are probably better (less chance of blurry text). */
  /* margin: -200px 0 0 -200px; */
  
  background: white;
  box-shadow: 0 0 60px 10px rgba(0, 0, 0, 0.9);
}
.closed {
  display: none;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 500;
  
  background: rgba(0, 0, 0, 0.6);
}
.modal-guts {
  position: absolute;
  top: 20%;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  padding: 20px 50px 20px 20px;
}
.modal-header{
    width: 100%;
    overflow: auto;
    padding: 20px 50px 20px 20px;
}


.modal .close-button {
  position: absolute;
  
  /* don't need to go crazy with z-index here, just sits over .modal-guts */
  z-index: 1;
  
  top: 10px;
  
  /* needs to look OK with or without scrollbar */
  right: 20px;
  
  border: 0;
  background:#49542c;
  color: white;
  padding: 5px 10px;
  font-size: 1.3rem;
}