extends Node2D
## One-shot expanding ring, greybox stand-in for any radial event
## (card blasts, heat detonations). Runs on scaled time, so a ring
## spawned during freeze blooms on release — which is the rhythm.

var max_radius := 56.0
var color := Color(1.0, 0.6, 0.2)
var duration := 0.18

var _t := 0.0


func _process(delta: float) -> void:
	_t += delta
	queue_redraw()
	if _t >= duration:
		queue_free()


func _draw() -> void:
	var k := clampf(_t / duration, 0.0, 1.0)
	var c := Color(color.r, color.g, color.b, 1.0 - k)
	draw_arc(Vector2.ZERO, maxf(max_radius * k, 1.0), 0.0, TAU, 48, c, 3.0)