I have a button that needs to be centered in it's div class ex. div="sanfrancisco-image". It's placed 17px from the bottom of the box, however it will appear center, even though I've placed justify-self:center; and align-items: center; tabs.
Here's the codepen link: https://codepen.io/holmedw/pen/KrvJEb
  .btn {
  align-items: center;
  position: absolute;
  padding: 0 20px;
  height: 40px;
  font-size: 1em;
  font-weight: 700;
  text-transform: uppercase;
  border: 2px black solid;
  border-radius: 1px;
  background: transparent;
  cursor: pointer;
  bottom: 17px;
  justify-self: center;
} 
 
     
    