Label swap.

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• Departing send button

  A send button that flies its glyph off the right edge and empties its label on hover, revealing a second line over a spreading accent wash.

• Dot flood button

  An outlined pill with a small dot beside its label; hovering grows the dot until it floods the whole button and the label swaps to its inverted twin.

• Rolling Label Button

  A compact glowing pill that rolls its caption up out of view and brings a second line in from below on hover.

Guidance