Cart: Add rounded corners to checkout button

Change your modal window checkout button to look more like a button:

Before:

How to:

Add the following code to the very bottom of this file on a new line:
assets/ajaxify.scss.liquid

/* -- code to add rounded corners to modal checkout button -- */
.ajaxcart--modal .checkout__button {
  border-radius: 5px;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  font-size:1.1em;
  margin-bottom:10px;
}
/* - end - */

Save the file.