.scroll-track{scrollbar-width:thin;scroll-timeline:--track block;height:280px;position:relative;overflow-y:scroll}.scroll-spacer{height:600px}.scroll-ball{background:oklch(55% .18 260);border-radius:50%;width:56px;height:56px;animation:linear both slide --track;position:fixed}@keyframes slide{0%{top:calc(100% - 56px - 1rem);left:calc(100% - 56px - 1rem)}to{top:1rem;left:1rem}}