@property --background-start-color{syntax:"<color>";inherits:true;initial-value:#0000}@property --background-end-color{syntax:"<color>";inherits:true;initial-value:#0000}body:has([data-not-found]){--background-start-color:var(--primitive-neutral-950);--background-end-color:var(--primitive-neutral-800);animation:1s ease-out checker-drain}@keyframes checker-drain{0%{--background-start-color:var(--checker-start-color);--background-end-color:var(--checker-end-color)}}body.checker-restore{transition:--background-start-color 1s ease-out,--background-end-color 1s ease-out}