.scrub-at{border-left:1px solid color-mix(in srgb, var(--fg) 28%, transparent);opacity:0;pointer-events:none;width:0;transition:opacity .16s var(--ease);position:absolute;top:0;bottom:0}.scrub-at b{top:var(--y,50%);width:11px;height:11px;box-shadow:0 0 0 3px var(--scrub-ring,var(--bg));background:currentColor;border-radius:50%;margin-top:-5.5px;position:absolute;left:-6px}.scrubbing>.scrub-at{opacity:1}