transition-style/src/squares/in-top-right.css

just add water clip-path mask transitions

@keyframes square-in-top-right {
  from {
    clip-path: var(--square-bottom-left-out);
  }
  to {
    clip-path: var(--square-in);
  }
}

[transition-style="in:square:top-right"] {
  animation-name: square-in-top-right;
}