message: fix(playground): webkit now respects border radius
diff: background: var(--playground-tabs-background);
  --ifm-tabs-spacing: 0;
  +
  + /**
  + * This fixes an issue in WebKit that causes the
  + * border radius to not be respected when hovering
  + * over a tab item. Note: This fix can be applied
  + * to .tabs-container too, but applying the fix
  + * here reduces the additional memory required to
  + * promote the element to its own layer.
  + */
  + border-radius: 16px 16px 0px 0px;
  + transform: translateZ(0);
  }
  .playground .tabs-nav {
  