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<nav aria-label="Breadcrumb">
  <ol>
    <li>
      <a href="" aria-current="page"></a>
    </li>
    <li>
      <a href=""></a>
    </li>
    <li>
      <a href=""></a>
    </li>
  </ol>
</nav>
ol {
  
  /* Clip n’ round */
  overflow: clip;
  border-radius: 16px;

  li {
    
    /* Arrow color */
    background: hsl(270 100% 30%);
    
    /* Reverses the z-indexes, making the arrows stack */
    /* Result: 2, 1, 0, ... (sibling-x requires Chrome 138+) */
    z-index: calc((sibling-index() * -1) + sibling-count());

    &:not(:last-child) {
      
      /* Arrow width */
      padding-right: 3px;
      
      /* Arrow shape */
      corner-shape: bevel;
      border-radius: 0 32px 32px 0 / 0 50% 50% 0;
      
      /* Pull the next one into this one */
      margin-right: -32px;
      
    }

    a {
      
      /* Same shape */
      corner-shape: inherit;
      border-radius: inherit;
      
      /* Overlay background */
      background: hsl(270 100% 50%);
      
    }
  }
}

/* Unimportant (but kinda cool) */

ol {
  margin: 0;
  padding: 0;
  list-style: none;
  font: 700 16px system-ui;
  
  /* “Step x” counter */
  counter-reset: step;
  
  /* For equal-width crumbs */
  display: inline-grid;

  /* Parents can’t sibling-count() 🤦‍♂️ */
  &:has(:nth-child(2)) {
    grid-template-columns: repeat(2, 1fr);
  }
  &:has(:nth-child(3)) {
    grid-template-columns: repeat(3, 1fr);
  }
  &:has(:nth-child(4)) {
    grid-template-columns: repeat(4, 1fr);
  }

  a {
    height: 64px;
    padding: 0 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-underline-position: under;
    /* Increment with every <a> */
    counter-increment: step;

    &::after {
      /* Display increment value */
      content: "Step " counter(step);
    }

    &[aria-current] {
      /* Current crumb styles */
      background: hsl(270 100% 40%);
    }

    &:hover {
      /* Hover crumb styles */
      background: hsl(300 100% 40%);
    }
  }
}
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