/* Clean, brief blue edge flash when an impulse blast launches the player. */
#impulseSpeedPulse{
 position:absolute;inset:0;pointer-events:none;overflow:hidden;contain:strict;
 opacity:0;z-index:2;will-change:opacity;
 background:radial-gradient(ellipse at center,transparent 58%,rgba(35,158,255,.04) 75%,rgba(48,166,255,.17) 100%);
 box-shadow:inset 0 0 4vmin rgba(84,199,255,.16);
}
/* Retire the old speed streaks and expanding ring without affecting HUD layers. */
#impulseSpeedPulse > *{display:none}
@media(prefers-reduced-motion:reduce){#impulseSpeedPulse{box-shadow:none}}