FormsPro

The bar travels and resizes to the label it lands on.

Four repeating gradients, one offset. No SVG, no border-image.

The focus ring moves ahead of the digit, which is what makes it feel typed.

The outgoing panel leaves against the travel direction while the incoming one arrives with it. Both move by the same small distance, so the pair reads as one sheet sliding rather than two panels crossfading.

The range paints in the direction you dragged.

The amplitude decays instead of stopping flat. That is what separates an error from a tantrum.

Each star overshoots as the pointer passes it.

The connector fills before the next number lights.

Segments fill left to right, the label changes with them.

The box fills, then the tick draws itself along its own path. Drawing the tick instead of fading it in is what makes it read as a decision rather than a repaint.