{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "cohort-retention",
  "title": "Cohort retention",
  "description": "Cohort retention is a production-ready charts component from BJORK UI, packaged for shadcn registries.",
  "dependencies": [
    "clsx",
    "framer-motion",
    "next-themes",
    "tailwind-merge"
  ],
  "files": [
    {
      "path": "components/bjork-ui/charts/cohort-retention.tsx",
      "content": "\"use client\";\n\nimport { useCallback, useEffect, useMemo, useRef, useState, type KeyboardEvent, type PointerEvent } from \"react\";\nimport { cn } from \"@/lib/utils\";\nimport type { BjorkTone } from \"@/components/bjork-ui/_core/palette\";\nimport { useChartCanvas, easeOut, roundRectPath } from \"@/components/bjork-ui/charts/_kit/canvas\";\nimport {\n  useChartTheme,\n  chartFocusRing,\n  ChartTable,\n  HoverTooltip,\n  ChartAnnouncer,\n  type TooltipHandle,\n  type AnnouncerHandle,\n  type TooltipContent,\n} from \"@/components/bjork-ui/charts/_kit/chrome\";\nimport { clamp, formatCompact, formatNumber, formatPercent, formatSigned, niceTicks } from \"@/components/bjork-ui/charts/_kit/scale\";\nimport { rampColor, rampInk } from \"@/components/bjork-ui/charts/_kit/series\";\n\nexport interface RetentionCohort {\n  id: string;\n  /** Row label, e.g. \"Mar 2026\". */\n  label: string;\n  /** Users who signed up in the cohort: the denominator for every period. */\n  size: number;\n  /**\n   * One entry per period since signup, period 0 first. Read as active counts or as fractions of\n   * `size`, depending on `valueType`. A shorter row is a cohort that hasn't reached the later periods\n   * yet (the triangle). `null`, `undefined`, non-finite and negative entries are missing: drawn\n   * empty, skipped by the average and by keyboard navigation, never treated as zero.\n   */\n  values: (number | null | undefined)[];\n}\n\nexport interface CohortRetentionProps {\n  cohorts: RetentionCohort[];\n  /** How `values` are read: active user counts (default) or fractions of the cohort size (0.42). */\n  valueType?: \"count\" | \"fraction\";\n  /** What the cells print: retained percent (default) or active users. The All cohorts row always prints percent. */\n  display?: \"percent\" | \"count\";\n  /**\n   * Retention range mapped onto the colour ramp, as fractions. Defaults to 0 up to the highest\n   * retention at period 1 or later (rounded up to 5%), so period 0's 100% doesn't flatten the\n   * scale; cells above the top of the domain take the strongest step.\n   */\n  domain?: [number, number];\n  /** Period names: `short` for column headers (\"M3\"), `long` for the tooltip and table (\"Month 3\"). */\n  formatPeriod?: (period: number, style: \"short\" | \"long\") => string;\n  /** Caption over the period columns. */\n  periodTitle?: string;\n  /** Formats user counts (sizes, active users). */\n  formatCount?: (v: number) => string;\n  /** Label of the size-weighted average row. */\n  averageLabel?: string;\n  /** Posed hover: [row, period]. Row `cohorts.length` is the All cohorts row. */\n  activeCell?: [number, number] | null;\n  /** Row height in px. Ignored when `height` is set. */\n  rowHeight?: number;\n  /** Total height in px; rows fit into it (minimum 16px each). Default: grows with the cohorts. */\n  height?: number;\n  ariaLabel?: string;\n  tone?: BjorkTone;\n  className?: string;\n}\n\nconst HEAD = 40;\nconst GAP = 2;\nconst AVG_GAP = 10;\nconst MIN_CELL = 32;\nconst MAX_CELL = 64;\nconst SCROLL_PAD = 16;\nconst LEGEND_GAP = 14;\nconst LEGEND_H = 24;\nconst RAMP_W = 112;\nconst ENTER_MS = 900;\nconst CELL_MS = 380;\nconst DIM = 0.42;\n// Geist Mono at 10px advances 0.6em per glyph; a hair over to stay on the safe side.\nconst CHAR_W = 6.15;\n\nconst defaultFormatCount = (v: number) => (Math.abs(v) >= 10000 ? formatCompact(v, 1) : formatNumber(v, 0));\nconst defaultFormatPeriod = (p: number, style: \"short\" | \"long\") => (style === \"long\" ? `Period ${p}` : String(p));\n\ninterface Matrix {\n  R: number;\n  P: number;\n  /** (R + 1) x P, row R is the average. NaN marks a missing cell. */\n  rate: Float64Array;\n  count: Float64Array;\n  /** Per period: users and cohorts behind the average. */\n  avgSize: Float64Array;\n  avgN: Int32Array;\n  totalSize: number;\n  /** Highest retention at period >= 1 (falls back to period 0), NaN when there is none. */\n  maxLater: number;\n}\n\nfunction buildMatrix(cohorts: RetentionCohort[], valueType: \"count\" | \"fraction\"): Matrix {\n  const R = cohorts.length;\n  let P = 0;\n  for (const c of cohorts) P = Math.max(P, c.values.length);\n  const rate = new Float64Array((R + 1) * P).fill(NaN);\n  const count = new Float64Array((R + 1) * P).fill(NaN);\n  const avgSize = new Float64Array(P);\n  const avgN = new Int32Array(P);\n  const sumCount = new Float64Array(P);\n  let totalSize = 0;\n  let maxLater = NaN;\n  let maxFirst = NaN;\n  for (let r = 0; r < R; r++) {\n    const co = cohorts[r];\n    const size = Number.isFinite(co.size) && co.size > 0 ? co.size : 0;\n    totalSize += size;\n    for (let c = 0; c < co.values.length; c++) {\n      const v = co.values[c];\n      if (v === null || v === undefined || !Number.isFinite(v) || v < 0 || !(size > 0)) continue;\n      const rt = valueType === \"count\" ? v / size : v;\n      const ct = valueType === \"count\" ? v : v * size;\n      rate[r * P + c] = rt;\n      count[r * P + c] = ct;\n      avgSize[c] += size;\n      avgN[c] += 1;\n      sumCount[c] += ct;\n      if (c >= 1) maxLater = Number.isNaN(maxLater) ? rt : Math.max(maxLater, rt);\n      else maxFirst = Number.isNaN(maxFirst) ? rt : Math.max(maxFirst, rt);\n    }\n  }\n  for (let c = 0; c < P; c++) {\n    if (avgSize[c] > 0) {\n      rate[R * P + c] = sumCount[c] / avgSize[c];\n      count[R * P + c] = sumCount[c];\n    }\n  }\n  return { R, P, rate, count, avgSize, avgN, totalSize, maxLater: Number.isNaN(maxLater) ? maxFirst : maxLater };\n}\n\ninterface Layout {\n  cellW: number;\n  rowH: number;\n  contentW: number;\n  viewW: number;\n  scrollable: boolean;\n  avgTop: number;\n  plotH: number;\n  rootH: number;\n  showValues: boolean;\n  headerEvery: number;\n}\n\ninterface Run {\n  enter: number;\n  hover: [number, number] | null;\n  source: \"pointer\" | \"keyboard\" | \"prop\" | null;\n}\n\n// Style writes from the loop only when the value changes; a hover frame touches every value span.\nconst written = new WeakMap<HTMLElement, string>();\nfunction putOpacity(el: HTMLElement, value: string) {\n  if (written.get(el) === value) return;\n  written.set(el, value);\n  el.style.opacity = value;\n}\n\n// Width of an element that may mount after the chart (empty data first, cohorts later), so the\n// observer attaches through a callback ref instead of a once-only effect.\nfunction useMeasuredWidth(): [(el: HTMLDivElement | null) => void, number, { current: HTMLDivElement | null }] {\n  const [width, setWidth] = useState(0);\n  const elRef = useRef<HTMLDivElement | null>(null);\n  const obs = useRef<ResizeObserver | null>(null);\n  const ref = useCallback((el: HTMLDivElement | null) => {\n    obs.current?.disconnect();\n    obs.current = null;\n    elRef.current = el;\n    if (!el || typeof ResizeObserver === \"undefined\") return;\n    obs.current = new ResizeObserver((entries) => {\n      const box = entries[0]?.contentRect;\n      if (box) setWidth(Math.round(box.width));\n    });\n    obs.current.observe(el);\n  }, []);\n  useEffect(() => () => obs.current?.disconnect(), []);\n  return [ref, width, elRef];\n}\n\nconst rowTopOf = (r: number, R: number, L: Layout) => (r < R ? HEAD + r * L.rowH : L.avgTop);\n\nexport function CohortRetention({\n  cohorts,\n  valueType = \"count\",\n  display = \"percent\",\n  domain,\n  formatPeriod = defaultFormatPeriod,\n  periodTitle = \"Periods since signup\",\n  formatCount = defaultFormatCount,\n  averageLabel = \"All cohorts\",\n  activeCell,\n  rowHeight = 28,\n  height,\n  ariaLabel = \"Cohort retention\",\n  tone: toneProp,\n  className,\n}: CohortRetentionProps) {\n  const { tone, pal, reduce, vars } = useChartTheme(toneProp);\n  const announcer = useRef<AnnouncerHandle>(null);\n  const tipRef = useRef<TooltipHandle>(null);\n  const wrapperRef = useRef<HTMLDivElement>(null);\n  const scrollerRef = useRef<HTMLDivElement>(null);\n  const fadeLRef = useRef<HTMLDivElement>(null);\n  const fadeRRef = useRef<HTMLDivElement>(null);\n  const valueRefs = useRef<(HTMLSpanElement | null)[]>([]);\n  const rowLabelRefs = useRef<(HTMLDivElement | null)[]>([]);\n  const colLabelRefs = useRef<(HTMLSpanElement | null)[]>([]);\n  const [gridBoxCallback, gridWidth, gridBoxRef] = useMeasuredWidth();\n\n  const m = useMemo(() => buildMatrix(cohorts, valueType), [cohorts, valueType]);\n  const { R, P } = m;\n\n  const [d0, d1] = useMemo<[number, number]>(() => {\n    if (domain && domain[1] > domain[0]) return domain;\n    const top = Number.isFinite(m.maxLater) && m.maxLater > 0 ? Math.ceil(m.maxLater * 20 - 1e-9) / 20 : 1;\n    return [0, top];\n  }, [domain, m.maxLater]);\n\n  // Per cell: fill, ink and printed text. Recomputed on data, tone or display changes, never on hover.\n  const cells = useMemo(() => {\n    const out: { r: number; c: number; i: number; fill: string; ink: \"light\" | \"dark\"; text: string }[] = [];\n    for (let r = 0; r <= R; r++)\n      for (let c = 0; c < P; c++) {\n        const i = r * P + c;\n        const rt = m.rate[i];\n        if (Number.isNaN(rt)) continue;\n        const t = (rt - d0) / Math.max(1e-9, d1 - d0);\n        out.push({\n          r,\n          c,\n          i,\n          fill: rampColor(tone, t),\n          ink: rampInk(tone, t),\n          text: display === \"count\" && r < R ? formatCount(m.count[i]) : formatPercent(rt, 0),\n        });\n      }\n    return out;\n  }, [m, R, P, d0, d1, tone, display, formatCount]);\n  const cellIndex = useMemo(() => {\n    const map = new Int32Array((R + 1) * P).fill(-1);\n    cells.forEach((cl, k) => (map[cl.i] = k));\n    return map;\n  }, [cells, R, P]);\n\n  const L = useMemo<Layout>(() => {\n    const viewW = gridWidth;\n    const cellW = P ? clamp(Math.floor(viewW / P), MIN_CELL, MAX_CELL) : MIN_CELL;\n    const contentW = cellW * P;\n    const scrollable = viewW > 0 && contentW > viewW + 1;\n    const pad = scrollable ? SCROLL_PAD : 0;\n    const rowH = height ? Math.max(16, Math.floor((height - HEAD - AVG_GAP - pad - LEGEND_GAP - LEGEND_H) / (R + 1))) : rowHeight;\n    const avgTop = HEAD + R * rowH + AVG_GAP;\n    const plotH = avgTop + rowH + pad;\n    let maxChars = 0;\n    for (const cl of cells) maxChars = Math.max(maxChars, cl.text.length);\n    let maxHead = 0;\n    for (let c = 0; c < P; c++) maxHead = Math.max(maxHead, formatPeriod(c, \"short\").length);\n    return {\n      cellW,\n      rowH,\n      contentW,\n      viewW,\n      scrollable,\n      avgTop,\n      plotH,\n      rootH: plotH + LEGEND_GAP + LEGEND_H,\n      showValues: rowH >= 18 && maxChars * CHAR_W + 4 <= cellW - GAP,\n      headerEvery: maxHead * CHAR_W + 6 <= cellW ? 1 : 2,\n    };\n  }, [gridWidth, P, R, height, rowHeight, cells, formatPeriod]);\n\n  const cfg = useRef({ m, L, cells, reduce, pal });\n  useEffect(() => {\n    cfg.current = { m, L, cells, reduce, pal };\n  });\n\n  const st = useRef<Run>({ enter: 0, hover: null, source: null });\n\n  const { rootRef, hostRef, canvasRef, wake } = useChartCanvas(({ ctx, dt }) => {\n    const s = st.current;\n    const c = cfg.current;\n    const p = c.pal;\n    const { R: nR, P: nP } = c.m;\n    const G = c.L;\n    if (!nP || !G.viewW) return false;\n\n    s.enter = c.reduce ? 1 : Math.min(1, s.enter + (dt * 1000) / ENTER_MS);\n    const ms = s.enter * ENTER_MS;\n    const span = Math.max(1, nR + nP - 1);\n    // Diagonal wipe from the oldest cohort's period 0 toward the newest corner.\n    const growOf = (r: number, col: number) => (s.enter >= 1 ? 1 : easeOut(clamp((ms - ((r + col) / span) * (ENTER_MS - CELL_MS)) / CELL_MS, 0, 1)));\n\n    const hov = s.hover;\n    const half = Math.min(G.cellW, G.rowH) / 2 - 1;\n    const radius = Math.min(3, G.rowH / 6);\n    for (let k = 0; k < c.cells.length; k++) {\n      const cl = c.cells[k];\n      const g = growOf(cl.r, cl.c);\n      const isHov = !!hov && hov[0] === cl.r && hov[1] === cl.c;\n      const dim = hov && hov[0] !== cl.r && hov[1] !== cl.c ? DIM : 1;\n      const el = valueRefs.current[k];\n      if (el) putOpacity(el, G.showValues ? String(+(clamp((g - 0.6) / 0.4, 0, 1) * dim).toFixed(3)) : \"0\");\n      if (g <= 0) continue;\n      const x = cl.c * G.cellW;\n      const y = rowTopOf(cl.r, nR, G);\n      const inset = GAP / 2 + (1 - g) * half;\n      ctx.globalAlpha = dim;\n      ctx.beginPath();\n      roundRectPath(ctx, x + inset, y + inset, G.cellW - inset * 2, G.rowH - inset * 2, radius, radius);\n      ctx.fillStyle = cl.fill;\n      ctx.fill();\n      ctx.globalAlpha = 1;\n      if (isHov) {\n        ctx.beginPath();\n        roundRectPath(ctx, x + inset + 0.75, y + inset + 0.75, G.cellW - inset * 2 - 1.5, G.rowH - inset * 2 - 1.5, radius, radius);\n        ctx.lineWidth = 1.5;\n        ctx.strokeStyle = p.text;\n        ctx.stroke();\n      }\n    }\n\n    const tip = tipRef.current;\n    const box = gridBoxRef.current;\n    const wrap = wrapperRef.current;\n    if (tip?.el && hov && box && wrap) {\n      const scrollX = scrollerRef.current?.scrollLeft ?? 0;\n      const W = wrap.clientWidth;\n      const H = G.rootH;\n      const left = box.offsetLeft;\n      const x0 = clamp(left + hov[1] * G.cellW - scrollX, left, left + G.viewW - G.cellW);\n      const x1 = x0 + G.cellW;\n      const y0 = rowTopOf(hov[0], nR, G);\n      const y1 = y0 + G.rowH;\n      const tw = tip.size.w;\n      const th = tip.size.h;\n      // Beside the cell, top-aligned: right of it the triangle is usually empty.\n      let tx = x1 + 8;\n      let ty = y0;\n      if (tx + tw > W) tx = x0 - 8 - tw;\n      if (tx < 0) {\n        // No room either side: centre it and move off the cell's row.\n        tx = clamp((x0 + x1) / 2 - tw / 2, 0, Math.max(0, W - tw));\n        ty = y1 + 8;\n        if (ty + th > H) ty = y0 - 8 - th;\n      }\n      ty = clamp(ty, 0, Math.max(0, H - th));\n      tip.el.style.transform = `translate3d(${Math.round(tx)}px, ${Math.round(ty)}px, 0)`;\n    }\n    return s.enter < 1;\n  });\n\n  // A new data set wipes in again; display or tone changes only repaint.\n  const dataKey = `${cohorts.map((c) => c.id).join(\"|\")}#${P}`;\n  useEffect(() => {\n    if (!reduce) st.current.enter = 0;\n    wake();\n    // eslint-disable-next-line react-hooks/exhaustive-deps\n  }, [dataKey]);\n  useEffect(() => {\n    wake();\n  }, [cells, L, pal, reduce, wake]);\n\n  const syncFades = () => {\n    const sc = scrollerRef.current;\n    if (!sc) return;\n    const l = sc.scrollLeft > 1;\n    const r = sc.scrollLeft + sc.clientWidth < sc.scrollWidth - 1;\n    if (fadeLRef.current) fadeLRef.current.style.opacity = l ? \"1\" : \"0\";\n    if (fadeRRef.current) fadeRRef.current.style.opacity = r ? \"1\" : \"0\";\n  };\n  useEffect(syncFades, [L]);\n\n  const cohortName = (r: number) => (r < R ? cohorts[r]?.label ?? \"\" : averageLabel);\n  const rateDigits = (v: number) => formatPercent(v, 1);\n  const ppOf = (r: number, c: number) => (m.rate[r * P + c] - m.rate[R * P + c]) * 100;\n\n  const tooltipFor = (r: number, c: number): TooltipContent | null => {\n    const i = r * P + c;\n    const k = cellIndex[i];\n    if (k < 0) return null;\n    const rt = m.rate[i];\n    const size = r < R ? cohorts[r].size : m.avgSize[c];\n    return {\n      key: `${r}|${c}|${pal.text}|${cells[k].fill}`,\n      title: `${cohortName(r)} · ${formatPeriod(c, \"long\")}`,\n      rows: [\n        { key: \"rate\", label: \"retained\", value: rateDigits(rt), color: cells[k].fill },\n        { key: \"count\", label: \"active\", value: `${formatCount(m.count[i])} of ${formatCount(size)}`, strong: false },\n        r < R\n          ? { key: \"vs\", label: `vs ${averageLabel.toLowerCase()}`, value: `${formatSigned(ppOf(r, c), (v) => formatNumber(v, 1))} pp`, strong: false }\n          : { key: \"n\", label: m.avgN[c] === 1 ? \"cohort\" : \"cohorts\", value: String(m.avgN[c]), strong: false },\n      ],\n    };\n  };\n\n  const describe = (r: number, c: number) => {\n    const i = r * P + c;\n    const size = r < R ? cohorts[r].size : m.avgSize[c];\n    const base = `${cohortName(r)}, ${formatPeriod(c, \"long\")}: ${rateDigits(m.rate[i])} retained, ${formatCount(m.count[i])} of ${formatCount(size)} users`;\n    return r < R ? `${base}, ${formatSigned(ppOf(r, c), (v) => formatNumber(v, 1))} points vs ${averageLabel.toLowerCase()}` : `${base}, across ${m.avgN[c]} ${m.avgN[c] === 1 ? \"cohort\" : \"cohorts\"}`;\n  };\n\n  const markLabels = (cell: [number, number] | null, on: boolean) => {\n    if (!cell) return;\n    const rEl = rowLabelRefs.current[cell[0]];\n    if (rEl) rEl.dataset.on = on ? \"1\" : \"0\";\n    const cEl = colLabelRefs.current[cell[1]];\n    if (cEl) cEl.dataset.on = on ? \"1\" : \"0\";\n  };\n\n  const revealColumn = (c: number) => {\n    const sc = scrollerRef.current;\n    if (!sc || !L.scrollable) return;\n    const x0 = c * L.cellW;\n    const x1 = x0 + L.cellW;\n    if (x0 < sc.scrollLeft) sc.scrollLeft = Math.max(0, x0 - L.cellW / 2);\n    else if (x1 > sc.scrollLeft + sc.clientWidth) sc.scrollLeft = x1 - sc.clientWidth + L.cellW / 2;\n  };\n\n  const setHover = (cell: [number, number] | null, source: Run[\"source\"]) => {\n    const s = st.current;\n    const valid = cell && cell[0] >= 0 && cell[0] <= R && cell[1] >= 0 && cell[1] < P && cellIndex[cell[0] * P + cell[1]] >= 0 ? cell : null;\n    const same = (!valid && !s.hover) || (valid && s.hover && valid[0] === s.hover[0] && valid[1] === s.hover[1]);\n    s.source = valid ? source : null;\n    if (same) return;\n    markLabels(s.hover, false);\n    s.hover = valid;\n    markLabels(valid, true);\n    tipRef.current?.set(valid ? tooltipFor(valid[0], valid[1]) : null);\n    if (valid && source !== \"pointer\") revealColumn(valid[1]);\n    if (valid && source === \"keyboard\") announcer.current?.say(describe(valid[0], valid[1]));\n    wake();\n  };\n\n  useEffect(() => {\n    if (activeCell === undefined) return;\n    const prev = st.current.hover;\n    // Re-post the pose when the tooltip content may have changed (tone, data).\n    if (prev) {\n      st.current.hover = null;\n      markLabels(prev, false);\n    }\n    setHover(activeCell, activeCell ? \"prop\" : null);\n    // eslint-disable-next-line react-hooks/exhaustive-deps\n  }, [activeCell?.[0], activeCell?.[1], m, pal, cells]);\n\n  const has = (r: number, c: number) => r >= 0 && r <= R && c >= 0 && c < P && cellIndex[r * P + c] >= 0;\n\n  const onPointerMove = (e: PointerEvent<HTMLDivElement>) => {\n    const box = gridBoxRef.current;\n    if (!box) return;\n    const rect = box.getBoundingClientRect();\n    const x = e.clientX - rect.left;\n    const y = e.clientY - rect.top;\n    if (x < 0 || x > Math.min(L.viewW, L.contentW)) {\n      setHover(null, null);\n      return;\n    }\n    const col = Math.floor((x + (scrollerRef.current?.scrollLeft ?? 0)) / L.cellW);\n    let row = -1;\n    if (y >= HEAD && y < HEAD + R * L.rowH) row = Math.floor((y - HEAD) / L.rowH);\n    else if (y >= L.avgTop && y < L.avgTop + L.rowH) row = R;\n    setHover(has(row, col) ? [row, col] : null, \"pointer\");\n  };\n\n  const onKeyDown = (e: KeyboardEvent<HTMLDivElement>) => {\n    const s = st.current;\n    if (e.key === \"Escape\") {\n      setHover(null, null);\n      return;\n    }\n    const keys = [\"ArrowUp\", \"ArrowDown\", \"ArrowLeft\", \"ArrowRight\", \"Home\", \"End\", \"PageUp\", \"PageDown\"];\n    if (!keys.includes(e.key) || !cells.length) return;\n    e.preventDefault();\n    if (!s.hover) {\n      // Start on the oldest cohort's first period after signup.\n      const first = cells.find((cl) => cl.r === 0 && cl.c === 1) ?? cells[0];\n      setHover([first.r, first.c], \"keyboard\");\n      return;\n    }\n    let [r, c] = s.hover;\n    const scan = (dr: number, dc: number) => {\n      for (let rr = r + dr, cc = c + dc; rr >= 0 && rr <= R && cc >= 0 && cc < P; rr += dr, cc += dc) if (has(rr, cc)) return [rr, cc] as const;\n      return null;\n    };\n    let next: readonly [number, number] | null = null;\n    if (e.key === \"ArrowRight\") next = scan(0, 1);\n    else if (e.key === \"ArrowLeft\") next = scan(0, -1);\n    else if (e.key === \"ArrowDown\") next = scan(1, 0);\n    else if (e.key === \"ArrowUp\") next = scan(-1, 0);\n    else if (e.key === \"Home\" || e.key === \"End\") {\n      // First or last reported period of this row.\n      for (let k = 0; k < P; k++) {\n        const cc = e.key === \"Home\" ? k : P - 1 - k;\n        if (has(r, cc)) {\n          next = [r, cc];\n          break;\n        }\n      }\n    } else {\n      // PageUp / PageDown: oldest cohort or the average row in this column.\n      for (let k = 0; k <= R; k++) {\n        const rr = e.key === \"PageUp\" ? k : R - k;\n        if (has(rr, c)) {\n          next = [rr, c];\n          break;\n        }\n      }\n    }\n    if (next) {\n      [r, c] = next;\n      setHover([r, c], \"keyboard\");\n    } else announcer.current?.say(describe(r, c));\n  };\n\n  const tableCols = useMemo(() => [\"Cohort\", \"Users\", ...Array.from({ length: P }, (_, c) => formatPeriod(c, \"long\"))], [P, formatPeriod]);\n  const tableRows = useMemo(\n    () =>\n      Array.from({ length: R + 1 }, (_, r) => [\n        r < R ? cohorts[r].label : averageLabel,\n        formatCount(r < R ? cohorts[r].size : m.totalSize),\n        ...Array.from({ length: P }, (_, c) => {\n          const i = r * P + c;\n          return Number.isNaN(m.rate[i]) ? \"no data\" : `${formatPercent(m.rate[i], 1)} (${formatCount(m.count[i])})`;\n        }),\n      ]),\n    [R, P, cohorts, averageLabel, formatCount, m],\n  );\n\n  const summary = useMemo(() => {\n    if (!R || !P) return `${ariaLabel}: no cohorts`;\n    const avg = (c: number) => m.rate[R * P + c];\n    let last = -1;\n    for (let c = P - 1; c >= 1; c--)\n      if (!Number.isNaN(avg(c))) {\n        last = c;\n        break;\n      }\n    const parts = [`${ariaLabel}: ${R} cohorts over ${P} periods`];\n    if (P > 1 && !Number.isNaN(avg(1))) parts.push(`${averageLabel.toLowerCase()} retain ${formatPercent(avg(1), 0)} at ${formatPeriod(1, \"long\").toLowerCase()}`);\n    if (last > 1) parts.push(`${formatPercent(avg(last), 0)} at ${formatPeriod(last, \"long\").toLowerCase()}`);\n    return parts.join(\", \");\n  }, [R, P, m, ariaLabel, averageLabel, formatPeriod]);\n\n  // Ramp ticks: both ends plus the round values that keep clear of them.\n  const ticks = useMemo(() => {\n    const span = d1 - d0;\n    return [d0, ...niceTicks(d0, d1, 3).filter((v) => v - d0 > span * 0.3 && d1 - v > span * 0.3), d1];\n  }, [d0, d1]);\n  const hasMissing = useMemo(() => {\n    for (let i = 0; i < R * P; i++) if (Number.isNaN(m.rate[i])) return true;\n    return false;\n  }, [m, R, P]);\n  const overflowTop = useMemo(() => {\n    for (const cl of cells) if (m.rate[cl.i] > d1 + 1e-9) return true;\n    return false;\n  }, [cells, m, d1]);\n  const rampCss = useMemo(() => `linear-gradient(90deg, ${[0, 0.2, 0.4, 0.6, 0.8, 1].map((t) => rampColor(tone, t)).join(\", \")})`, [tone]);\n\n  // Empty data keeps the whole tree mounted (hidden), so the canvas host stays observed and sizes\n  // itself when cohorts arrive.\n  const empty = !R || !P;\n\n  const rowLabel = \"flex shrink-0 items-center gap-3 rounded-[4px] transition-colors duration-100 data-[on=1]:text-[color:var(--bjork-text)]\";\n\n  return (\n    <div\n      ref={rootRef}\n      data-loop=\"idle\"\n      className={cn(\"@container relative w-full select-none text-[color:var(--bjork-text)]\", className)}\n      style={{ ...vars, height: empty ? (height ?? 160) : L.rootH }}\n    >\n      {empty && (\n        <div className=\"absolute inset-0 flex items-center justify-center font-bjork-alpha text-[12px] text-[color:var(--bjork-text-muted)]\">No cohorts yet</div>\n      )}\n      <div\n        ref={wrapperRef}\n        role=\"group\"\n        aria-roledescription=\"chart\"\n        aria-label={`${ariaLabel}. Arrow keys move between cells, Home and End jump along a cohort, Page Up and Page Down along a period.`}\n        tabIndex={empty ? -1 : 0}\n        onPointerMove={onPointerMove}\n        onPointerDown={(e) => {\n          if (e.pointerType === \"touch\") onPointerMove(e);\n        }}\n        onPointerLeave={(e) => {\n          // A touch tap fires leave right after up; keep the tapped mark until the next tap.\n          if (e.pointerType !== \"touch\") setHover(null, null);\n        }}\n        onBlur={() => setHover(null, null)}\n        onKeyDown={onKeyDown}\n        aria-hidden={empty || undefined}\n        className={cn(\"absolute inset-x-0 top-0 flex rounded-[10px]\", empty && \"invisible\", L.scrollable ? \"touch-pan-x touch-pan-y\" : \"touch-pan-y\", chartFocusRing)}\n        style={{ height: L.plotH }}\n      >\n        {/* Hairline above the average row, across both columns. */}\n        <div aria-hidden=\"true\" className=\"pointer-events-none absolute inset-x-0 h-px bg-[color:var(--bjork-hair)]\" style={{ top: L.avgTop - AVG_GAP / 2 - 0.5 }} />\n\n        {/* Sticky label column: it never scrolls; the periods scroll beside it when they don't fit. */}\n        <div aria-hidden=\"true\" className=\"relative flex min-w-0 max-w-[176px] shrink-0 flex-col pr-3 @max-[480px]:max-w-[112px] @max-[480px]:pr-2\">\n          <div className=\"flex shrink-0 items-end justify-between gap-3 pb-[8px] font-mono text-[10px] uppercase leading-none tracking-[0.08em] text-[color:var(--bjork-text-soft)]\" style={{ height: HEAD }}>\n            <span className=\"[text-box:trim-both_cap_alphabetic]\">Cohort</span>\n            <span className=\"[text-box:trim-both_cap_alphabetic]\">Users</span>\n          </div>\n          {cohorts.map((co, r) => (\n            <div\n              key={co.id}\n              ref={(el) => {\n                rowLabelRefs.current[r] = el;\n              }}\n              data-on=\"0\"\n              className={cn(rowLabel, \"text-[color:var(--bjork-text-muted)]\")}\n              style={{ height: L.rowH }}\n            >\n              <span className=\"min-w-0 truncate font-bjork-alpha text-[11px] font-medium leading-[13px]\">{co.label}</span>\n              <span className=\"ml-auto shrink-0 text-right font-mono text-[10px] leading-none tabular-nums [text-box:trim-both_cap_alphabetic]\">{formatCount(co.size)}</span>\n            </div>\n          ))}\n          <div className=\"shrink-0\" style={{ height: AVG_GAP }} />\n          <div\n            ref={(el) => {\n              rowLabelRefs.current[R] = el;\n            }}\n            data-on=\"0\"\n            className={cn(rowLabel, \"text-[color:var(--bjork-text-medium)]\")}\n            style={{ height: L.rowH }}\n          >\n            <span className=\"min-w-0 truncate font-bjork-alpha text-[11px] font-semibold leading-[13px]\">{averageLabel}</span>\n            <span className=\"ml-auto shrink-0 text-right font-mono text-[10px] leading-none tabular-nums [text-box:trim-both_cap_alphabetic]\">{formatCount(m.totalSize)}</span>\n          </div>\n        </div>\n\n        <div ref={gridBoxCallback} className=\"relative min-w-0 flex-1\">\n          <span\n            aria-hidden=\"true\"\n            className=\"pointer-events-none absolute left-0 top-[6px] max-w-full truncate font-mono text-[10px] uppercase leading-none tracking-[0.08em] text-[color:var(--bjork-text-soft)] [text-box:trim-both_cap_alphabetic]\"\n          >\n            {periodTitle}\n          </span>\n          <div\n            ref={scrollerRef}\n            onScroll={() => {\n              syncFades();\n              if (st.current.hover) wake();\n            }}\n            tabIndex={-1}\n            className=\"absolute inset-0 overflow-x-auto overflow-y-hidden [scrollbar-width:thin]\"\n          >\n            <div className=\"relative h-full\" style={{ width: L.contentW }}>\n              <div ref={hostRef} className=\"absolute left-0 top-0\" style={{ width: L.contentW, height: L.avgTop + L.rowH }}>\n                <canvas ref={canvasRef} role=\"img\" aria-label={summary} className=\"pointer-events-none absolute left-0 top-0\" />\n              </div>\n              {Array.from({ length: P }, (_, c) => (\n                <span\n                  key={`p${c}`}\n                  ref={(el) => {\n                    colLabelRefs.current[c] = el;\n                  }}\n                  data-on=\"0\"\n                  aria-hidden=\"true\"\n                  className={cn(\n                    \"pointer-events-none absolute whitespace-nowrap font-mono text-[10px] leading-none tabular-nums text-[color:var(--bjork-text-muted)] transition-colors duration-100 [text-box:trim-both_cap_alphabetic] data-[on=1]:text-[color:var(--bjork-text)]\",\n                    c % L.headerEvery !== 0 && \"opacity-0 data-[on=1]:opacity-100\",\n                  )}\n                  style={{ left: c * L.cellW + L.cellW / 2, top: HEAD - 12, transform: \"translate(-50%, -50%)\" }}\n                >\n                  {formatPeriod(c, \"short\")}\n                </span>\n              ))}\n              {cells.map((cl, k) => (\n                <span\n                  key={cl.i}\n                  ref={(el) => {\n                    valueRefs.current[k] = el;\n                  }}\n                  aria-hidden=\"true\"\n                  data-ink={cl.ink}\n                  className=\"pointer-events-none absolute whitespace-nowrap font-mono text-[10px] leading-none tabular-nums opacity-0 [text-box:trim-both_cap_alphabetic] data-[ink=dark]:text-[rgba(23,23,23,0.84)] data-[ink=light]:text-[rgba(255,248,242,0.94)]\"\n                  style={{ left: cl.c * L.cellW + L.cellW / 2, top: rowTopOf(cl.r, R, L) + L.rowH / 2, transform: \"translate(-50%, -50%)\" }}\n                >\n                  {cl.text}\n                </span>\n              ))}\n            </div>\n          </div>\n          <div\n            ref={fadeLRef}\n            aria-hidden=\"true\"\n            className=\"pointer-events-none absolute bottom-0 left-0 top-0 w-5 opacity-0 transition-opacity duration-150\"\n            style={{ background: \"linear-gradient(90deg, var(--bjork-chart-bg), transparent)\" }}\n          />\n          <div\n            ref={fadeRRef}\n            aria-hidden=\"true\"\n            className=\"pointer-events-none absolute bottom-0 right-0 top-0 w-6 opacity-0 transition-opacity duration-150\"\n            style={{ background: \"linear-gradient(270deg, var(--bjork-chart-bg), transparent)\" }}\n          />\n        </div>\n        <HoverTooltip ref={tipRef} onMeasure={wake} />\n      </div>\n\n      {/* Footer: what a blank cell means, and the colour scale. */}\n      <div\n        aria-hidden=\"true\"\n        className={cn(\"pointer-events-none absolute inset-x-0 bottom-0 flex items-start justify-between gap-4 font-mono text-[10px] leading-none tabular-nums text-[color:var(--bjork-text-soft)]\", empty && \"invisible\")}\n        style={{ height: LEGEND_H }}\n      >\n        <span className={cn(\"flex min-w-0 items-center gap-1.5\", !hasMissing && \"invisible\")}>\n          <span className=\"inline-block size-2.5 shrink-0 rounded-[2px] border border-dashed border-[color:var(--bjork-border-strong)]\" />\n          <span className=\"truncate [text-box:trim-both_cap_alphabetic]\">Blank: not reached yet</span>\n        </span>\n        <span className=\"flex shrink-0 items-start gap-2\">\n          <span className=\"pt-px [text-box:trim-both_cap_alphabetic]\">Retained</span>\n          <span className=\"relative block\" style={{ width: RAMP_W }}>\n            <span className=\"block h-[6px] rounded-full\" style={{ background: rampCss }} />\n            {ticks.map((v, k) => (\n              <span\n                key={v}\n                className={cn(\n                  \"absolute top-[12px] whitespace-nowrap [text-box:trim-both_cap_alphabetic]\",\n                  k === 0 ? \"translate-x-0\" : k === ticks.length - 1 ? \"-translate-x-full\" : \"-translate-x-1/2\",\n                )}\n                style={{ left: ((v - d0) / Math.max(1e-9, d1 - d0)) * RAMP_W }}\n              >\n                {formatPercent(v, 0)}\n                {overflowTop && k === ticks.length - 1 ? \"+\" : \"\"}\n              </span>\n            ))}\n          </span>\n        </span>\n      </div>\n\n      <ChartTable caption={ariaLabel} columns={tableCols} rows={tableRows} />\n      <ChartAnnouncer ref={announcer} />\n    </div>\n  );\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/charts/cohort-retention.tsx"
    },
    {
      "path": "lib/utils.ts",
      "content": "import { clsx, type ClassValue } from \"clsx\"\nimport { twMerge } from \"tailwind-merge\"\n\nexport function cn(...inputs: ClassValue[]) {\n  return twMerge(clsx(inputs))\n}\n",
      "type": "registry:lib",
      "target": "@lib/utils.ts"
    },
    {
      "path": "components/bjork-ui/_core/palette.ts",
      "content": "export type BjorkTone = \"dark\" | \"light\";\n\n// Canvas, WebGL and SVG attribute colours. DOM code uses the CSS tokens with these as fallbacks.\nexport const BJORK_PALETTE = {\n  dark: {\n    bg: \"#050505\", stage: \"#111111\", surface: \"#121212\", raised: \"#161616\", active: \"#202020\",\n    border: \"#232323\", borderStrong: \"#343434\",\n    text: \"#ededed\", textMedium: \"rgba(237,237,237,0.72)\", textMuted: \"rgba(237,237,237,0.6)\",\n    textSoft: \"rgba(237,237,237,0.5)\", textFaint: \"rgba(237,237,237,0.22)\", hair: \"rgba(237,237,237,0.12)\",\n    accent: \"#ec5c13\", accentInk: \"#ec5c13\", accentFill: \"#b84a12\", accentSoft: \"rgba(236,92,19,0.12)\", accentMuted: \"rgba(236,92,19,0.24)\",\n    accentFg: \"#fff2ea\", success: \"#4cc38a\", warning: \"#f2b544\", error: \"#ff5c4d\",\n  },\n  light: {\n    bg: \"#f7f5ef\", stage: \"#f7f5ef\", surface: \"#fffcf6\", raised: \"#f5efe3\", active: \"#efe7d8\",\n    border: \"#eee6db\", borderStrong: \"#e1d7c8\",\n    text: \"#171717\", textMedium: \"rgba(23,23,23,0.78)\", textMuted: \"rgba(23,23,23,0.68)\",\n    textSoft: \"rgba(23,23,23,0.62)\", textFaint: \"rgba(23,23,23,0.22)\", hair: \"rgba(23,23,23,0.10)\",\n    accent: \"#ec7d43\", accentInk: \"#b4531f\", accentFill: \"#ec7d43\", accentSoft: \"rgba(236,125,67,0.10)\", accentMuted: \"rgba(236,125,67,0.20)\",\n    accentFg: \"#3f2112\", success: \"#1f8a55\", warning: \"#a86b00\", error: \"#c8361f\",\n  },\n} as const;\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/palette.ts"
    },
    {
      "path": "components/bjork-ui/charts/_kit/canvas.ts",
      "content": "\"use client\";\n\n// Canvas plumbing shared by the Charts collection. One hook gives a chart a measured host, a\n// DPR-capped canvas that follows it, and a draw loop that pauses offscreen and idles when settled.\n\nimport { useCallback, useEffect, useRef, type RefObject } from \"react\";\nimport { useVisibleLoop } from \"@/components/bjork-ui/_core/loop\";\nimport { sizeCanvas, useElementSize } from \"@/components/bjork-ui/_core/canvas\";\nimport { cubicBezier, ease } from \"@/components/bjork-ui/_core/motion\";\n\nexport interface ChartFrame {\n  ctx: CanvasRenderingContext2D;\n  w: number;\n  h: number;\n  dt: number;\n  t: number;\n}\n\n/**\n * `draw` runs inside `useVisibleLoop`. Return true to keep animating, false to go idle until `wake()`.\n * The loop root is `rootRef` (gets `data-loop`). The canvas is sized to `hostRef`.\n */\nexport function useChartCanvas(draw: (f: ChartFrame) => boolean) {\n  const rootRef = useRef<HTMLDivElement>(null);\n  const hostRef = useRef<HTMLDivElement>(null);\n  const canvasRef = useRef<HTMLCanvasElement>(null);\n  const size = useElementSize(hostRef);\n  const sizeRef = useRef({ w: 0, h: 0, dpr: 1 });\n  const drawRef = useRef(draw);\n  useEffect(() => {\n    drawRef.current = draw;\n  });\n\n  const frame = useCallback((dt: number, t: number) => {\n    const canvas = canvasRef.current;\n    const { w, h, dpr } = sizeRef.current;\n    if (!canvas || !w || !h) return true;\n    const ctx = canvas.getContext(\"2d\");\n    if (!ctx) return false;\n    ctx.setTransform(dpr, 0, 0, dpr, 0, 0);\n    ctx.clearRect(0, 0, w, h);\n    return drawRef.current({ ctx, w, h, dt, t });\n  }, []);\n\n  const { wake } = useVisibleLoop(rootRef as RefObject<HTMLElement | null>, frame);\n\n  useEffect(() => {\n    const canvas = canvasRef.current;\n    if (!canvas || !size.width || !size.height) return;\n    sizeRef.current = { w: size.width, h: size.height, dpr: sizeCanvas(canvas, size.width, size.height) };\n    wake();\n  }, [size.width, size.height, wake]);\n\n  return { rootRef, hostRef, canvasRef, size, wake };\n}\n\n// The house ease-out for entrances, usable in rAF code.\nexport const easeOut = cubicBezier(...(ease.out as unknown as [number, number, number, number]));\nexport const easeInOut = cubicBezier(...(ease.inOut as unknown as [number, number, number, number]));\n\n// A 45 degree hatch pattern in `color`, for counterfactual and loss regions.\nconst hatchCache = new Map<string, CanvasPattern | null>();\nexport function hatchPattern(ctx: CanvasRenderingContext2D, color: string, gap = 5, width = 1): CanvasPattern | null {\n  const key = `${color}|${gap}|${width}`;\n  if (hatchCache.has(key)) return hatchCache.get(key)!;\n  if (typeof document === \"undefined\") return null;\n  const tile = document.createElement(\"canvas\");\n  const s = gap * 2;\n  tile.width = s * 2;\n  tile.height = s * 2;\n  const c = tile.getContext(\"2d\");\n  if (!c) return null;\n  c.scale(2, 2);\n  c.strokeStyle = color;\n  c.lineWidth = width;\n  c.beginPath();\n  for (let k = -s; k <= s * 2; k += gap) {\n    c.moveTo(k, s);\n    c.lineTo(k + s, 0);\n  }\n  c.stroke();\n  const pattern = ctx.createPattern(tile, \"repeat\");\n  pattern?.setTransform(new DOMMatrix().scale(0.5, 0.5));\n  hatchCache.set(key, pattern);\n  return pattern;\n}\n\n// Rounded rect path with independent top and bottom radii (bars: round data end, square baseline).\nexport function roundRectPath(\n  ctx: CanvasRenderingContext2D,\n  x: number,\n  y: number,\n  w: number,\n  h: number,\n  rTop: number,\n  rBottom = 0,\n) {\n  if (w <= 0 || h <= 0) return;\n  const rt = Math.min(rTop, w / 2, h / 2);\n  const rb = Math.min(rBottom, w / 2, h / 2);\n  ctx.moveTo(x + rt, y);\n  ctx.lineTo(x + w - rt, y);\n  if (rt) ctx.arcTo(x + w, y, x + w, y + rt, rt);\n  ctx.lineTo(x + w, y + h - rb);\n  if (rb) ctx.arcTo(x + w, y + h, x + w - rb, y + h, rb);\n  ctx.lineTo(x + rb, y + h);\n  if (rb) ctx.arcTo(x, y + h, x, y + h - rb, rb);\n  ctx.lineTo(x, y + rt);\n  if (rt) ctx.arcTo(x, y, x + rt, y, rt);\n  ctx.closePath();\n}\n\nexport interface PlacedLabel {\n  text: string;\n  x: number;\n  y: number;\n  /** translate percentages applied after the position, e.g. -50 to centre. */\n  ax?: number;\n  ay?: number;\n  opacity?: number;\n}\n\n// Writes a pool of absolutely positioned label spans from the loop: text only when it changes,\n// position by transform only. Unused spans hide.\nexport function writeLabels(els: (HTMLElement | null)[], cache: string[], items: PlacedLabel[]) {\n  for (let i = 0; i < els.length; i++) {\n    const el = els[i];\n    if (!el) continue;\n    const it = items[i];\n    if (!it) {\n      if (el.style.opacity !== \"0\") el.style.opacity = \"0\";\n      continue;\n    }\n    if (cache[i] !== it.text) {\n      cache[i] = it.text;\n      el.textContent = it.text;\n    }\n    el.style.opacity = String(it.opacity ?? 1);\n    el.style.transform = `translate3d(${it.x.toFixed(2)}px, ${it.y.toFixed(2)}px, 0) translate(${it.ax ?? 0}%, ${it.ay ?? -50}%)`;\n  }\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/charts/_kit/canvas.ts"
    },
    {
      "path": "components/bjork-ui/_core/loop.ts",
      "content": "\"use client\";\n\nimport { useCallback, useEffect, useMemo, useRef, type RefObject } from \"react\";\n\nexport interface VisibleLoopOptions {\n  enabled?: boolean;\n  fpsCap?: number;\n  rootMargin?: string;\n}\n\n/**\n * Runs `frame(dt, t)` on requestAnimationFrame while the element is near the viewport,\n * the tab is visible and `enabled` is not false. Return `false` from `frame` to go idle\n * until `wake()` is called. Writes `data-loop` on the element: running, idle or paused.\n */\nexport function useVisibleLoop(\n  ref: RefObject<HTMLElement | null>,\n  frame: (dt: number, t: number) => boolean | void,\n  opts?: VisibleLoopOptions,\n): { wake: () => void } {\n  const enabled = opts?.enabled !== false;\n  const fpsCap = opts?.fpsCap ?? 0;\n  const rootMargin = opts?.rootMargin ?? \"96px\";\n\n  const frameRef = useRef(frame);\n  useEffect(() => {\n    frameRef.current = frame;\n  }, [frame]);\n\n  const wakeRef = useRef<() => void>(() => {});\n  const wake = useCallback(() => wakeRef.current(), []);\n\n  useEffect(() => {\n    const el = ref.current;\n    if (!el || typeof window === \"undefined\") return;\n\n    let wants = true; // false once the frame callback returns false\n    let inView = false;\n    let raf = 0;\n    let last = 0;\n    let t = 0;\n    const minFrame = fpsCap > 0 ? 1000 / fpsCap : 0;\n\n    const canRun = () => enabled && inView && document.visibilityState === \"visible\";\n    const stop = () => {\n      if (raf) cancelAnimationFrame(raf);\n      raf = 0;\n    };\n\n    const update = () => {\n      if (!enabled) {\n        stop();\n        el.dataset.loop = \"paused\";\n        return;\n      }\n      if (!wants) {\n        stop();\n        el.dataset.loop = \"idle\";\n        return;\n      }\n      if (!canRun()) {\n        stop();\n        el.dataset.loop = \"paused\";\n        return;\n      }\n      el.dataset.loop = \"running\";\n      if (!raf) {\n        last = performance.now();\n        raf = requestAnimationFrame(tick);\n      }\n    };\n\n    const tick = (now: number) => {\n      raf = 0;\n      if (!canRun() || !wants) {\n        update();\n        return;\n      }\n      const elapsed = now - last;\n      if (minFrame && elapsed < minFrame - 0.5) {\n        raf = requestAnimationFrame(tick);\n        return;\n      }\n      last = now;\n      const dt = Math.min(0.05, Math.max(0, elapsed / 1000));\n      t += dt;\n      const keep = frameRef.current(dt, t);\n      if (keep === false) {\n        wants = false;\n        update();\n        return;\n      }\n      raf = requestAnimationFrame(tick);\n    };\n\n    const observer = new IntersectionObserver(\n      ([entry]) => {\n        inView = entry.isIntersecting;\n        update();\n      },\n      { rootMargin },\n    );\n    observer.observe(el);\n\n    const onVisibility = () => update();\n    document.addEventListener(\"visibilitychange\", onVisibility);\n\n    wakeRef.current = () => {\n      wants = true;\n      update();\n    };\n\n    update();\n\n    return () => {\n      stop();\n      observer.disconnect();\n      document.removeEventListener(\"visibilitychange\", onVisibility);\n      wakeRef.current = () => {};\n    };\n  }, [ref, enabled, fpsCap, rootMargin]);\n\n  return useMemo(() => ({ wake }), [wake]);\n}\n\n// matchMedia based check. False on the server.\nexport function isCoarsePointer(): boolean {\n  if (typeof window === \"undefined\" || typeof window.matchMedia !== \"function\") return false;\n  return window.matchMedia(\"(pointer: coarse)\").matches;\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/loop.ts"
    },
    {
      "path": "components/bjork-ui/_core/canvas.ts",
      "content": "\"use client\";\n\nimport { useEffect, useState, type RefObject } from \"react\";\nimport { isCoarsePointer } from \"./loop\";\n\n// Caps DPR at 1.5 on coarse pointers and 2 otherwise.\nexport function defaultMaxDpr(): number {\n  return isCoarsePointer() ? 1.5 : 2;\n}\n\n// Sets the backing size for a CSS box and returns the DPR used.\nexport function sizeCanvas(\n  canvas: HTMLCanvasElement,\n  cssW: number,\n  cssH: number,\n  maxDpr: number = defaultMaxDpr(),\n): number {\n  const dpr = Math.min(typeof window !== \"undefined\" ? window.devicePixelRatio || 1 : 1, maxDpr);\n  canvas.width = Math.max(1, Math.round(cssW * dpr));\n  canvas.height = Math.max(1, Math.round(cssH * dpr));\n  canvas.style.width = `${cssW}px`;\n  canvas.style.height = `${cssH}px`;\n  return dpr;\n}\n\n// Rounded size of an element, kept current with a ResizeObserver.\nexport function useElementSize(ref: RefObject<HTMLElement | null>): { width: number; height: number } {\n  const [size, setSize] = useState({ width: 0, height: 0 });\n\n  useEffect(() => {\n    const el = ref.current;\n    if (!el || typeof ResizeObserver === \"undefined\") return;\n    const observer = new ResizeObserver((entries) => {\n      const box = entries[0]?.contentRect;\n      if (!box) return;\n      const width = Math.round(box.width);\n      const height = Math.round(box.height);\n      setSize((prev) => (prev.width === width && prev.height === height ? prev : { width, height }));\n    });\n    observer.observe(el);\n    return () => observer.disconnect();\n  }, [ref]);\n\n  return size;\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/canvas.ts"
    },
    {
      "path": "components/bjork-ui/_core/motion.ts",
      "content": "// Shared springs, easings and durations. Components import these instead of inventing values.\n\nexport const springs = {\n  press: { type: \"spring\", stiffness: 500, damping: 30, mass: 0.6 },\n  snappy: { type: \"spring\", stiffness: 400, damping: 25, mass: 1 },\n  standard: { type: \"spring\", stiffness: 300, damping: 30, mass: 0.8 },\n  soft: { type: \"spring\", stiffness: 200, damping: 25, mass: 1.2 },\n  settle: { type: \"spring\", stiffness: 380, damping: 30, mass: 0.8 },\n  blurIn: { type: \"spring\", stiffness: 400, damping: 28, mass: 0.6 },\n} as const;\n\nexport const ease = {\n  out: [0.23, 1, 0.32, 1],\n  inOut: [0.77, 0, 0.175, 1],\n  drawer: [0.32, 0.72, 0, 1],\n} as const;\n\nexport const easeCss = {\n  out: \"cubic-bezier(0.23,1,0.32,1)\",\n  inOut: \"cubic-bezier(0.77,0,0.175,1)\",\n  drawer: \"cubic-bezier(0.32,0.72,0,1)\",\n} as const;\n\nexport const durations = { press: 140, tooltip: 160, menu: 200, panel: 280 } as const; // ms\n\n// Cubic bezier easing for canvas and rAF code. Returns progress y for input x in [0, 1].\nexport function cubicBezier(x1: number, y1: number, x2: number, y2: number): (t: number) => number {\n  const cx = 3 * x1;\n  const bx = 3 * (x2 - x1) - cx;\n  const ax = 1 - cx - bx;\n  const cy = 3 * y1;\n  const by = 3 * (y2 - y1) - cy;\n  const ay = 1 - cy - by;\n  const sampleX = (s: number) => ((ax * s + bx) * s + cx) * s;\n  const sampleY = (s: number) => ((ay * s + by) * s + cy) * s;\n  const sampleDX = (s: number) => (3 * ax * s + 2 * bx) * s + cx;\n\n  const solveX = (x: number) => {\n    let s = x;\n    for (let i = 0; i < 8; i++) {\n      const err = sampleX(s) - x;\n      if (Math.abs(err) < 1e-6) return s;\n      const d = sampleDX(s);\n      if (Math.abs(d) < 1e-6) break;\n      s -= err / d;\n    }\n    let lo = 0;\n    let hi = 1;\n    s = x;\n    while (lo < hi) {\n      const v = sampleX(s);\n      if (Math.abs(v - x) < 1e-6) return s;\n      if (x > v) lo = s;\n      else hi = s;\n      s = (lo + hi) / 2;\n      if (hi - lo < 1e-7) break;\n    }\n    return s;\n  };\n\n  return (t: number) => {\n    if (t <= 0) return 0;\n    if (t >= 1) return 1;\n    return sampleY(solveX(t));\n  };\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/motion.ts"
    },
    {
      "path": "components/bjork-ui/charts/_kit/chrome.tsx",
      "content": "\"use client\";\n\n// Shared chart chrome for the Charts collection: theme vars, the hover tooltip, legend keys and the\n// screen-reader table twin every chart ships with.\n\nimport { forwardRef, memo, useEffect, useImperativeHandle, useLayoutEffect, useRef, useState, type CSSProperties, type ReactNode } from \"react\";\nimport { useReducedMotion } from \"framer-motion\";\nimport { cn } from \"@/lib/utils\";\nimport { BJORK_PALETTE, type BjorkTone } from \"@/components/bjork-ui/_core/palette\";\nimport { useBjorkTone } from \"@/components/bjork-ui/_core/tone\";\nimport { LiveRegion } from \"@/components/bjork-ui/_core/a11y\";\nimport { surfaceVars } from \"@/components/bjork-ui/_core/surface\";\n\nexport type ChartPalette = (typeof BJORK_PALETTE)[BjorkTone];\n\n// Tokens a chart root writes so DOM overlays follow `tone` even outside a themed page.\nexport function chartVars(pal: ChartPalette): CSSProperties {\n  return {\n    ...surfaceVars(pal === BJORK_PALETTE.light ? \"light\" : \"dark\"),\n    \"--bjork-accent\": pal.accent,\n    \"--bjork-accent-ink\": pal.accentInk,\n    \"--bjork-accent-fill\": pal.accentFill,\n    \"--bjork-accent-soft\": pal.accentSoft,\n    \"--bjork-accent-foreground\": pal.accentFg,\n    \"--bjork-text\": pal.text,\n    \"--bjork-text-medium\": pal.textMedium,\n    \"--bjork-text-muted\": pal.textMuted,\n    \"--bjork-text-soft\": pal.textSoft,\n    \"--bjork-text-faint\": pal.textFaint,\n    \"--bjork-hair\": pal.hair,\n    \"--bjork-border\": pal.border,\n    \"--bjork-border-strong\": pal.borderStrong,\n    \"--bjork-surface\": pal.surface,\n    \"--bjork-surface-hover\": pal.raised,\n    \"--bjork-ring-offset\": pal.bg,\n    // The surface a chart sits on, for label halos and cut-outs. Override it on the root if needed.\n    \"--bjork-chart-bg\": pal.stage,\n    \"--bjork-success\": pal.success,\n    \"--bjork-warning\": pal.warning,\n    \"--bjork-error\": pal.error,\n  } as CSSProperties;\n}\n\n// Tone, palette, reduced motion and root vars in one call.\nexport function useChartTheme(toneProp?: BjorkTone) {\n  const tone = useBjorkTone(toneProp);\n  const pal = BJORK_PALETTE[tone];\n  const reduce = !!useReducedMotion();\n  return { tone, pal, reduce, vars: chartVars(pal) };\n}\n\n// Focus ring shared by every focusable plot surface.\nexport const chartFocusRing =\n  \"outline-none focus-visible:ring-2 focus-visible:ring-[color:var(--bjork-accent)] focus-visible:ring-offset-2 focus-visible:ring-offset-[color:var(--bjork-ring-offset)]\";\n\n// Mono label style: 10px Geist Mono, tabular, cap-trimmed.\nexport const chartMono = \"font-mono text-[10px] leading-none tabular-nums [text-box:trim-both_cap_alphabetic]\";\n\n// Floating chart surfaces follow the library canon (_core/surface.ts): a 1px border plus the inset light\n// shadow. Hover cards take the full surface shadow; small readout tags take the soft one. Colours come\n// from chartVars, so light and dark both follow the tone.\nexport const chartCardEdge = \"border border-[color:var(--bjork-border)] shadow-[var(--bjork-shadow-surface)]\";\nexport const chartTagEdge = \"border border-[color:var(--bjork-border)] shadow-[var(--bjork-shadow-soft)]\";\n\nexport interface TooltipRow {\n  key?: string;\n  label: ReactNode;\n  value: ReactNode;\n  color?: string;\n  dashed?: boolean;\n  strong?: boolean;\n}\n\n// The hover card. Values lead, labels follow, series keyed with a short line in the series colour.\n// Position it with `style.transform` from the caller; it never takes pointer events.\nexport const ChartTooltip = forwardRef<\n  HTMLDivElement,\n  { title?: ReactNode; rows: TooltipRow[]; visible: boolean; className?: string; style?: CSSProperties; tipKey?: string }\n>(function ChartTooltip({ title, rows, visible, className, style, tipKey }, ref) {\n  return (\n    <div\n      ref={ref}\n      data-key={tipKey}\n      role=\"presentation\"\n      aria-hidden=\"true\"\n      className={cn(\n        `pointer-events-none absolute left-0 top-0 z-10 min-w-[120px] rounded-[10px] ${chartCardEdge} bg-[color:var(--bjork-surface)] px-2.5 py-2 transition-opacity duration-150 ease-out`,\n        visible ? \"opacity-100\" : \"opacity-0\",\n        className,\n      )}\n      style={style}\n    >\n      {title !== undefined && (\n        <div className=\"mb-1.5 whitespace-nowrap font-mono text-[10px] uppercase leading-none tracking-[0.08em] text-[color:var(--bjork-text-soft)] [text-box:trim-both_cap_alphabetic]\">\n          {title}\n        </div>\n      )}\n      <div className=\"flex flex-col gap-[7px]\">\n        {rows.map((r, i) => (\n          <div key={r.key ?? i} className=\"flex items-center gap-2 whitespace-nowrap leading-none\">\n            {r.color && (\n              <span\n                aria-hidden=\"true\"\n                className=\"inline-block w-2.5 shrink-0\"\n                style={\n                  r.dashed\n                    ? { borderTop: `1.5px dashed ${r.color}`, height: 0 }\n                    : { background: r.color, height: 2, borderRadius: 1 }\n                }\n              />\n            )}\n            <span\n              className={cn(\n                \"font-mono text-[12px] tabular-nums [text-box:trim-both_cap_alphabetic]\",\n                r.strong === false ? \"text-[color:var(--bjork-text-medium)]\" : \"text-[color:var(--bjork-text)]\",\n              )}\n            >\n              {r.value}\n            </span>\n            <span className=\"ml-auto pl-3 font-bjork-alpha text-[11px] text-[color:var(--bjork-text-muted)] [text-box:trim-both_cap_alphabetic]\">\n              {r.label}\n            </span>\n          </div>\n        ))}\n      </div>\n    </div>\n  );\n});\n\n// Places a tooltip of size (tw, th) next to (x, y) inside a (w, h) box, flipping away from edges.\nexport function placeTooltip(\n  x: number,\n  y: number,\n  tw: number,\n  th: number,\n  w: number,\n  h: number,\n  gap = 12,\n): { x: number; y: number } {\n  let tx = x + gap;\n  if (tx + tw > w) tx = x - gap - tw;\n  if (tx < 0) tx = Math.max(0, Math.min(w - tw, x - tw / 2));\n  let ty = y - th - gap;\n  if (ty < 0) ty = Math.min(h - th, y + gap);\n  return { x: Math.round(tx), y: Math.round(Math.max(0, ty)) };\n}\n\nexport interface LegendItem {\n  id: string;\n  label: string;\n  color: string;\n  shape?: \"line\" | \"dash\" | \"rect\" | \"dot\";\n  muted?: boolean;\n}\n\n// A legend row. Keys mirror the mark: line for lines, rect for areas and bars.\nexport function ChartLegend({\n  items,\n  className,\n  onHover,\n  activeId,\n}: {\n  items: LegendItem[];\n  className?: string;\n  onHover?: (id: string | null) => void;\n  activeId?: string | null;\n}) {\n  return (\n    <div className={cn(\"flex flex-wrap items-center gap-x-4 gap-y-2\", className)}>\n      {items.map((it) => {\n        const dim = (activeId && activeId !== it.id) || it.muted;\n        return (\n          <span\n            key={it.id}\n            onPointerEnter={onHover ? () => onHover(it.id) : undefined}\n            onPointerLeave={onHover ? () => onHover(null) : undefined}\n            className={cn(\n              \"inline-flex items-center gap-1.5 font-bjork-alpha text-[11px] font-medium leading-3 transition-opacity duration-150 ease-out\",\n              dim ? \"opacity-45\" : \"opacity-100\",\n              \"text-[color:var(--bjork-text-medium)]\",\n            )}\n          >\n            <LegendKey color={it.color} shape={it.shape} />\n            {it.label}\n          </span>\n        );\n      })}\n    </div>\n  );\n}\n\nexport function LegendKey({ color, shape = \"rect\" }: { color: string; shape?: LegendItem[\"shape\"] }) {\n  if (shape === \"line\") return <span aria-hidden=\"true\" className=\"inline-block h-[2px] w-2.5 rounded-[1px]\" style={{ background: color }} />;\n  if (shape === \"dash\") return <span aria-hidden=\"true\" className=\"inline-block h-0 w-2.5\" style={{ borderTop: `1.5px dashed ${color}` }} />;\n  if (shape === \"dot\") return <span aria-hidden=\"true\" className=\"inline-block size-2 rounded-full\" style={{ background: color }} />;\n  return <span aria-hidden=\"true\" className=\"inline-block size-2 rounded-[2px]\" style={{ background: color }} />;\n}\n\n// The table twin. Every value the chart shows is reachable here without hovering.\n// Memoised: hover state re-renders the chart, never the table. Pass memoised rows.\nexport const ChartTable = memo(function ChartTable({\n  caption,\n  columns,\n  rows,\n}: {\n  caption: string;\n  columns: string[];\n  rows: (string | number)[][];\n}) {\n  return (\n    <table className=\"sr-only\">\n      <caption>{caption}</caption>\n      <thead>\n        <tr>\n          {columns.map((c) => (\n            <th key={c} scope=\"col\">\n              {c}\n            </th>\n          ))}\n        </tr>\n      </thead>\n      <tbody>\n        {rows.map((r, i) => (\n          <tr key={i}>\n            {r.map((cell, j) =>\n              j === 0 ? (\n                <th key={j} scope=\"row\">\n                  {cell}\n                </th>\n              ) : (\n                <td key={j}>{cell}</td>\n              ),\n            )}\n          </tr>\n        ))}\n      </tbody>\n    </table>\n  );\n});\n\n// A pool of absolutely positioned spans the draw loop fills through `writeLabels`.\nexport function LabelPool({\n  count,\n  pool,\n  className,\n}: {\n  count: number;\n  pool: { current: (HTMLSpanElement | null)[] };\n  className?: string;\n}) {\n  return (\n    <>\n      {Array.from({ length: count }).map((_, i) => (\n        <span\n          key={i}\n          ref={(el) => {\n            pool.current[i] = el;\n          }}\n          aria-hidden=\"true\"\n          className={cn(\n            \"pointer-events-none absolute left-0 top-0 whitespace-nowrap opacity-0\",\n            className ?? \"font-mono text-[10px] leading-none tabular-nums text-[color:var(--bjork-text-faint)] [text-box:trim-both_cap_alphabetic]\",\n          )}\n        />\n      ))}\n    </>\n  );\n}\n\nexport interface TooltipContent {\n  key: string;\n  title?: ReactNode;\n  rows: TooltipRow[];\n}\n\nexport interface TooltipHandle {\n  /** Shows `content`, or hides with `null`. Same key is a no-op. */\n  set: (content: TooltipContent | null) => void;\n  readonly el: HTMLDivElement | null;\n  /** Measured size of the current content. */\n  readonly size: { w: number; h: number };\n}\n\n// A tooltip that owns its state, so hovering re-renders only the tooltip, never the chart.\n// The chart positions it from its draw loop through `handle.el.style.transform`.\nexport const HoverTooltip = forwardRef<TooltipHandle, { onMeasure?: () => void; className?: string }>(function HoverTooltip(\n  { onMeasure, className },\n  ref,\n) {\n  const [state, setState] = useState<{ content: TooltipContent | null; last: TooltipContent | null }>({ content: null, last: null });\n  const elRef = useRef<HTMLDivElement>(null);\n  const size = useRef({ w: 0, h: 0 });\n  const onMeasureRef = useRef(onMeasure);\n  useEffect(() => {\n    onMeasureRef.current = onMeasure;\n  });\n  useImperativeHandle(\n    ref,\n    () => ({\n      set: (content) =>\n        setState((prev) => {\n          if ((prev.content?.key ?? null) === (content?.key ?? null)) return prev;\n          return { content, last: content ?? prev.last };\n        }),\n      get el() {\n        return elRef.current;\n      },\n      get size() {\n        return size.current;\n      },\n    }),\n    [],\n  );\n  useLayoutEffect(() => {\n    const el = elRef.current;\n    if (!el) return;\n    size.current = { w: el.offsetWidth, h: el.offsetHeight };\n    onMeasureRef.current?.();\n  }, [state.last]);\n  const shown = state.content ?? state.last;\n  return <ChartTooltip ref={elRef} title={shown?.title} rows={shown?.rows ?? []} visible={!!state.content} className={className} />;\n});\n\nexport interface AnnouncerHandle {\n  say: (message: string) => void;\n}\n\n// Polite live region with a 250ms trailing throttle, isolated from the chart's renders.\nexport const ChartAnnouncer = forwardRef<AnnouncerHandle, { ms?: number }>(function ChartAnnouncer({ ms = 250 }, ref) {\n  const [message, setMessage] = useState(\"\");\n  const at = useRef(0);\n  const timer = useRef<ReturnType<typeof setTimeout> | null>(null);\n  useEffect(\n    () => () => {\n      if (timer.current) clearTimeout(timer.current);\n    },\n    [],\n  );\n  useImperativeHandle(\n    ref,\n    () => ({\n      say: (text: string) => {\n        const now = performance.now();\n        if (timer.current) clearTimeout(timer.current);\n        if (now - at.current >= ms) {\n          at.current = now;\n          setMessage(text);\n        } else {\n          timer.current = setTimeout(() => {\n            at.current = performance.now();\n            setMessage(text);\n          }, ms);\n        }\n      },\n    }),\n    [ms],\n  );\n  return <LiveRegion message={message} />;\n});\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/charts/_kit/chrome.tsx"
    },
    {
      "path": "components/bjork-ui/_core/tone.ts",
      "content": "\"use client\";\n\nimport { useSyncExternalStore } from \"react\";\nimport { useTheme } from \"next-themes\";\nimport type { BjorkTone } from \"./palette\";\n\nconst subscribeNoop = () => () => {};\nconst getMounted = () => true;\nconst getServerMounted = () => false;\n\n/**\n * Resolves the tone for a component. An explicit `tone` always wins.\n * Otherwise it follows next-themes' resolved theme, but only after mount,\n * so the server render and first client render agree on dark.\n */\nexport function useBjorkTone(tone?: BjorkTone): BjorkTone {\n  const { resolvedTheme } = useTheme();\n  const mounted = useSyncExternalStore(subscribeNoop, getMounted, getServerMounted);\n  if (tone) return tone;\n  if (!mounted) return \"dark\";\n  return resolvedTheme === \"light\" ? \"light\" : \"dark\";\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/tone.ts"
    },
    {
      "path": "components/bjork-ui/_core/a11y.tsx",
      "content": "import type { ReactNode } from \"react\";\n\n// Text for assistive tech only.\nexport function VisuallyHidden({ children }: { children: ReactNode }) {\n  return <span className=\"sr-only\">{children}</span>;\n}\n\n// Announces `message` when it changes. Same text re-rendered does not re-announce.\nexport function LiveRegion({\n  message,\n  politeness = \"polite\",\n}: {\n  message: string;\n  politeness?: \"polite\" | \"assertive\";\n}) {\n  return (\n    <span role=\"status\" aria-live={politeness} aria-atomic=\"true\" className=\"sr-only\">\n      {message}\n    </span>\n  );\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/a11y.tsx"
    },
    {
      "path": "components/bjork-ui/_core/surface.ts",
      "content": "import type { CSSProperties } from \"react\";\nimport type { BjorkTone } from \"./palette\";\n\n// The library surface (CANON.md §1). Values mirror app/globals.css :root and .dark. Change both together.\nexport const BJORK_SURFACE = {\n  light: {\n    surface: \"#fffcf6\", surfaceMuted: \"rgba(250, 246, 237, 0.94)\", surfaceHover: \"#f5efe3\", surfaceActive: \"#efe7d8\",\n    panel: \"#f8f2e7\", menu: \"rgba(255, 252, 246, 0.98)\", field: \"rgba(255, 252, 246, 0.96)\",\n    fieldMuted: \"rgba(248, 242, 231, 0.82)\", fieldInset: \"rgba(239, 231, 216, 0.72)\",\n    border: \"#eee6db\", borderMuted: \"#f5ede2\", borderStrong: \"#e1d7c8\",\n    shadowSurface: \"inset 0 7px 14px rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.92), inset 1px 0 0 rgba(88, 72, 49, 0.026), inset -1px 0 0 rgba(255, 255, 255, 0.68), 0 14px 22px -9px rgba(66, 52, 33, 0.11)\",\n    shadowSoft: \"inset 0 1px 0 rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.86)\",\n    shadowPanel: \"inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.64), 0 18px 38px -30px rgba(66, 52, 33, 0.2)\",\n    shadowMenu: \"inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 0 12px 24px rgba(88, 72, 49, 0.022), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.62), 0 22px 44px -26px rgba(66, 52, 33, 0.22)\",\n    shadowInset: \"inset 0 1px 10px rgba(88, 72, 49, 0.12), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.72)\",\n  },\n  dark: {\n    surface: \"#121212\", surfaceMuted: \"rgba(22, 22, 22, 0.92)\", surfaceHover: \"#161616\", surfaceActive: \"#202020\",\n    panel: \"#0d0d0d\", menu: \"rgba(18, 18, 18, 0.98)\", field: \"rgba(18, 18, 18, 0.95)\",\n    fieldMuted: \"rgba(18, 18, 18, 0.55)\", fieldInset: \"rgba(9, 9, 9, 0.75)\",\n    border: \"#232323\", borderMuted: \"#1c1c1c\", borderStrong: \"#343434\",\n    shadowSurface: \"inset 0 7px 14px rgba(255, 255, 255, 0.03), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.06), 0 14px 20px -6px rgba(0, 0, 0, 0.45)\",\n    shadowSoft: \"inset 0 1px 0 rgba(255, 255, 255, 0.045)\",\n    shadowPanel: \"inset 0 1px 0 rgba(255, 255, 255, 0.035), 0 18px 36px -28px rgba(0, 0, 0, 0.9)\",\n    shadowMenu: \"inset 0 1px 0 rgba(255, 255, 255, 0.055), inset 0 12px 24px rgba(255, 255, 255, 0.018), inset 0 -18px 26px rgba(0, 0, 0, 0.24), 0 22px 42px -22px rgba(0, 0, 0, 0.9)\",\n    shadowInset: \"inset 0 1px 10px rgba(0, 0, 0, 0.45)\",\n  },\n} as const;\n\n/** Writes the surface tokens for a pinned tone as --bjork-* custom properties. Spread first; kit-specific keys may override. */\nexport function surfaceVars(tone: BjorkTone): CSSProperties {\n  const s = BJORK_SURFACE[tone];\n  return {\n    \"--bjork-surface\": s.surface, \"--bjork-surface-muted\": s.surfaceMuted, \"--bjork-surface-hover\": s.surfaceHover,\n    \"--bjork-surface-active\": s.surfaceActive, \"--bjork-panel\": s.panel, \"--bjork-menu\": s.menu, \"--bjork-field\": s.field,\n    \"--bjork-field-muted\": s.fieldMuted, \"--bjork-field-inset\": s.fieldInset, \"--bjork-border\": s.border,\n    \"--bjork-border-muted\": s.borderMuted, \"--bjork-border-strong\": s.borderStrong,\n    \"--bjork-shadow-surface\": s.shadowSurface, \"--bjork-shadow-soft\": s.shadowSoft, \"--bjork-shadow-panel\": s.shadowPanel,\n    \"--bjork-shadow-menu\": s.shadowMenu, \"--bjork-shadow-inset\": s.shadowInset,\n  } as CSSProperties;\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/surface.ts"
    },
    {
      "path": "components/bjork-ui/charts/_kit/scale.ts",
      "content": "// Shared chart math for the Charts collection: nice ticks, scales, damping, colour and number formatting.\n// Pure functions only. Every chart imports what it needs by path.\n\nexport function clamp(v: number, lo: number, hi: number): number {\n  return v < lo ? lo : v > hi ? hi : v;\n}\n\nexport function lerp(a: number, b: number, t: number): number {\n  return a + (b - a) * t;\n}\n\n// Maps v from [d0, d1] to [r0, r1]. Degenerate domains map to the range midpoint.\nexport function scaleLinear(d0: number, d1: number, r0: number, r1: number): (v: number) => number {\n  const span = d1 - d0;\n  if (!(Math.abs(span) > 1e-12)) return () => (r0 + r1) / 2;\n  const k = (r1 - r0) / span;\n  return (v: number) => r0 + (v - d0) * k;\n}\n\n// Frame-rate independent approach: moves `cur` toward `target` with time constant `tau` seconds.\nexport function damp(cur: number, target: number, tau: number, dt: number): number {\n  if (tau <= 0) return target;\n  return target + (cur - target) * Math.exp(-dt / tau);\n}\n\n// A \"nice\" step (1, 2, 2.5 or 5 x 10^k) that splits `span` into roughly `count` intervals.\nexport function niceStep(span: number, count = 5): number {\n  if (!(span > 0) || !Number.isFinite(span)) return 1;\n  const raw = span / Math.max(1, count);\n  const mag = 10 ** Math.floor(Math.log10(raw));\n  const r = raw / mag;\n  const m = r <= 1 ? 1 : r <= 2 ? 2 : r <= 2.5 ? 2.5 : r <= 5 ? 5 : 10;\n  return m * mag;\n}\n\n// Tick values at a nice step, inclusive of the domain ends when they land on the step.\nexport function niceTicks(lo: number, hi: number, count = 5): number[] {\n  if (!(hi > lo)) return [lo];\n  const step = niceStep(hi - lo, count);\n  const first = Math.ceil(lo / step - 1e-9);\n  const last = Math.floor(hi / step + 1e-9);\n  const out: number[] = [];\n  for (let n = first; n <= last; n++) out.push(Number((n * step).toFixed(12)));\n  return out;\n}\n\n// Expands [lo, hi] outward to the nearest nice step, so the outer gridlines sit on round values.\nexport function niceDomain(lo: number, hi: number, count = 5): [number, number] {\n  if (!(hi > lo)) {\n    const pad = Math.max(Math.abs(hi) * 0.1, 1);\n    return [lo - pad, hi + pad];\n  }\n  const step = niceStep(hi - lo, count);\n  return [Math.floor(lo / step + 1e-9) * step, Math.ceil(hi / step - 1e-9) * step];\n}\n\n// Half-pixel snap for crisp 1px hairlines.\nexport function crisp(v: number): number {\n  return Math.round(v) + 0.5;\n}\n\n// --- Colour -------------------------------------------------------------------------------------\n\nconst rgbCache = new Map<string, [number, number, number, number]>();\n\n// Parses #rgb, #rrggbb and rgba()/rgb() strings. Returns [r, g, b, a].\nexport function parseColor(c: string): [number, number, number, number] {\n  const hit = rgbCache.get(c);\n  if (hit) return hit;\n  let out: [number, number, number, number] = [0, 0, 0, 1];\n  const s = c.trim();\n  if (s.startsWith(\"#\")) {\n    let h = s.slice(1);\n    if (h.length === 3) h = h.split(\"\").map((ch) => ch + ch).join(\"\");\n    const n = parseInt(h.slice(0, 6), 16);\n    out = [(n >> 16) & 255, (n >> 8) & 255, n & 255, 1];\n  } else {\n    const m = s.match(/rgba?\\(([^)]+)\\)/);\n    if (m) {\n      const p = m[1].split(\",\").map((x) => parseFloat(x));\n      out = [p[0] ?? 0, p[1] ?? 0, p[2] ?? 0, p[3] ?? 1];\n    }\n  }\n  rgbCache.set(c, out);\n  return out;\n}\n\n// The colour at alpha `a`, multiplied with any alpha the colour already has.\nexport function withAlpha(c: string, a: number): string {\n  const [r, g, b, a0] = parseColor(c);\n  return `rgba(${r},${g},${b},${+(a0 * a).toFixed(4)})`;\n}\n\n// Mixes two opaque colours in sRGB. t = 0 gives `a`.\nexport function mixColor(a: string, b: string, t: number): string {\n  const ca = parseColor(a);\n  const cb = parseColor(b);\n  const r = Math.round(lerp(ca[0], cb[0], t));\n  const g = Math.round(lerp(ca[1], cb[1], t));\n  const bl = Math.round(lerp(ca[2], cb[2], t));\n  return `rgb(${r},${g},${bl})`;\n}\n\n// --- Numbers ------------------------------------------------------------------------------------\n\nconst fmtCache = new Map<string, Intl.NumberFormat>();\nfunction nf(opts: Intl.NumberFormatOptions): Intl.NumberFormat {\n  const key = JSON.stringify(opts);\n  let f = fmtCache.get(key);\n  if (!f) {\n    f = new Intl.NumberFormat(\"en-US\", opts);\n    fmtCache.set(key, f);\n  }\n  return f;\n}\n\nexport function formatNumber(v: number, digits = 1): string {\n  if (!Number.isFinite(v)) return \"–\";\n  return nf({ maximumFractionDigits: digits, minimumFractionDigits: 0 }).format(v);\n}\n\nexport function formatFixed(v: number, digits = 2): string {\n  if (!Number.isFinite(v)) return \"–\";\n  return nf({ maximumFractionDigits: digits, minimumFractionDigits: digits }).format(v);\n}\n\n// 1,284 / 12.9K / 4.2M. Uses a true minus sign.\nexport function formatCompact(v: number, digits = 1): string {\n  if (!Number.isFinite(v)) return \"–\";\n  const s = nf({ notation: \"compact\", maximumFractionDigits: digits }).format(Math.abs(v));\n  return v < 0 ? `−${s}` : s;\n}\n\nexport function formatPercent(v: number, digits = 0): string {\n  if (!Number.isFinite(v)) return \"–\";\n  const s = nf({ maximumFractionDigits: digits, minimumFractionDigits: digits }).format(Math.abs(v * 100));\n  return `${v < 0 ? \"−\" : \"\"}${s}%`;\n}\n\n// +1.2 / −0.8 / 0. Signed numbers use a true minus and an explicit plus.\nexport function formatSigned(v: number, format: (n: number) => string = (n) => formatNumber(n)): string {\n  if (!Number.isFinite(v)) return \"–\";\n  const body = format(Math.abs(v));\n  // A value that rounds to zero carries no sign.\n  if (Math.abs(v) < 1e-12 || !/[1-9]/.test(body)) return body;\n  return `${v > 0 ? \"+\" : \"−\"}${body}`;\n}\n\n// Gaussian kernel density at x for a sorted sample, bandwidth h.\nexport function kde(sample: number[], x: number, h: number): number {\n  const n = sample.length;\n  if (!n || !(h > 0)) return 0;\n  let s = 0;\n  const inv = 1 / h;\n  for (let i = 0; i < n; i++) {\n    const u = (x - sample[i]) * inv;\n    if (u > 4 || u < -4) continue;\n    s += Math.exp(-0.5 * u * u);\n  }\n  return s / (n * h * Math.sqrt(2 * Math.PI));\n}\n\n// Silverman's rule of thumb bandwidth.\nexport function silverman(sample: number[]): number {\n  const n = sample.length;\n  if (n < 2) return 1;\n  const mean = sample.reduce((a, b) => a + b, 0) / n;\n  const sd = Math.sqrt(sample.reduce((a, b) => a + (b - mean) ** 2, 0) / (n - 1));\n  const sorted = [...sample].sort((a, b) => a - b);\n  const iqr = quantile(sorted, 0.75) - quantile(sorted, 0.25);\n  const spread = Math.min(sd, iqr / 1.34) || sd || 1;\n  return 0.9 * spread * n ** -0.2;\n}\n\n// Linear-interpolated quantile of a sorted array.\nexport function quantile(sorted: number[], q: number): number {\n  const n = sorted.length;\n  if (!n) return NaN;\n  if (n === 1) return sorted[0];\n  const pos = clamp(q, 0, 1) * (n - 1);\n  const lo = Math.floor(pos);\n  const hi = Math.min(n - 1, lo + 1);\n  return sorted[lo] + (sorted[hi] - sorted[lo]) * (pos - lo);\n}\n\n// Standard normal sample from a uniform source (Box-Muller).\nexport function gaussian(rnd: () => number): number {\n  const u = Math.max(rnd(), 1e-9);\n  const v = rnd();\n  return Math.sqrt(-2 * Math.log(u)) * Math.cos(2 * Math.PI * v);\n}\n\n// --- Time ---------------------------------------------------------------------------------------\n\nconst HOUR = 3600000;\nconst DAY = 86400000;\nconst timeFmt = {\n  hour: new Intl.DateTimeFormat(\"en-US\", { hour: \"numeric\", timeZone: \"UTC\" }),\n  day: new Intl.DateTimeFormat(\"en-US\", { month: \"short\", day: \"numeric\", timeZone: \"UTC\" }),\n  month: new Intl.DateTimeFormat(\"en-US\", { month: \"short\", timeZone: \"UTC\" }),\n  monthYear: new Intl.DateTimeFormat(\"en-US\", { month: \"short\", year: \"2-digit\", timeZone: \"UTC\" }),\n  year: new Intl.DateTimeFormat(\"en-US\", { year: \"numeric\", timeZone: \"UTC\" }),\n};\n\nexport interface TimeTick {\n  t: number;\n  label: string;\n}\n\n// Calendar-aligned ticks (UTC) for [t0, t1] drawn across `px` pixels, at least `minPx` apart.\nexport function timeTicks(t0: number, t1: number, px: number, minPx = 64): TimeTick[] {\n  const span = t1 - t0;\n  if (!(span > 0) || !(px > 0)) return [];\n  const maxTicks = Math.max(1, Math.floor(px / minPx));\n  const perTick = span / maxTicks;\n  const out: TimeTick[] = [];\n  const hourSteps = [1, 2, 3, 6, 12];\n  for (const k of hourSteps) {\n    if (k * HOUR >= perTick) {\n      const step = k * HOUR;\n      for (let t = Math.ceil(t0 / step) * step; t <= t1; t += step) {\n        const d = new Date(t);\n        out.push({ t, label: d.getUTCHours() === 0 ? timeFmt.day.format(t) : timeFmt.hour.format(t) });\n      }\n      return out;\n    }\n  }\n  const daySteps = [1, 2, 3, 7, 14];\n  for (const k of daySteps) {\n    if (k * DAY >= perTick) {\n      const step = k * DAY;\n      // Weekly steps land on Mondays.\n      const offset = k === 7 || k === 14 ? 4 * DAY : 0;\n      for (let t = Math.ceil((t0 - offset) / step) * step + offset; t <= t1; t += step) out.push({ t, label: timeFmt.day.format(t) });\n      return out;\n    }\n  }\n  const monthSteps = [1, 2, 3, 6, 12, 24, 60];\n  for (const k of monthSteps) {\n    if (k * 30.44 * DAY >= perTick) {\n      const d0 = new Date(t0);\n      let y = d0.getUTCFullYear();\n      let m = d0.getUTCMonth();\n      // First boundary at or after t0 that is a multiple of k months.\n      m = Math.ceil(m / k) * k;\n      for (;;) {\n        y += Math.floor(m / 12);\n        m %= 12;\n        const t = Date.UTC(y, m, 1);\n        if (t > t1) break;\n        if (t >= t0) {\n          const label = k >= 12 ? timeFmt.year.format(t) : m === 0 ? timeFmt.monthYear.format(t) : timeFmt.month.format(t);\n          out.push({ t, label });\n        }\n        m += k;\n      }\n      return out;\n    }\n  }\n  return out;\n}\n\nexport function formatDateUTC(t: number, style: \"day\" | \"full\" = \"day\"): string {\n  if (style === \"full\") return new Date(t).toLocaleDateString(\"en-US\", { weekday: \"short\", month: \"short\", day: \"numeric\", year: \"numeric\", timeZone: \"UTC\" });\n  return timeFmt.day.format(t);\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/charts/_kit/scale.ts"
    },
    {
      "path": "components/bjork-ui/charts/_kit/series.ts",
      "content": "// Series colour for the Charts collection: a fixed categorical order for identity and a one-hue\n// ramp for magnitude. Pure data and functions; every chart imports what it needs by path.\n//\n// The categorical order is warm-anchored: the ember accent first, then warm ink-neutral steps,\n// then one cool counterpoint (steel), then deeper or lighter steps of the accent family. Every\n// light slot clears 3:1 on the paper stage. Hues are assigned in this order and never cycled:\n// past six series, fold the rest into \"Other\" (see `foldSeries`).\n\nimport type { BjorkTone } from \"@/components/bjork-ui/_core/palette\";\nimport { clamp, lerp, parseColor } from \"@/components/bjork-ui/charts/_kit/scale\";\n\nexport const CHART_SERIES: Record<BjorkTone, readonly string[]> = {\n  //       ember      warm ink   warm grey  steel      deep rust  light ember\n  dark: [\"#ec5c13\", \"#d9d3c7\", \"#8f877a\", \"#5b8fb9\", \"#b84a12\", \"#f0a272\"],\n  light: [\"#c94f10\", \"#3a352d\", \"#8a8174\", \"#3f6f96\", \"#8f3a0e\", \"#d67a45\"],\n};\n\n// The neutral an \"Other\" bucket takes, so it never impersonates a series.\nexport const CHART_OTHER: Record<BjorkTone, string> = { dark: \"#5c5c5c\", light: \"#a8a39a\" };\n\nexport const MAX_SERIES = 6;\n\n// Slot colour by the series' stable index (its position in the caller's data, never its rank).\nexport function seriesColor(tone: BjorkTone, index: number): string {\n  const set = CHART_SERIES[tone];\n  return index >= 0 && index < set.length ? set[index] : CHART_OTHER[tone];\n}\n\n// Keeps the first `max - 1` items and sums the rest into one \"Other\" item when there are more\n// than `max`. `merge` builds the Other item from the folded ones.\nexport function foldSeries<T>(items: T[], max: number, merge: (rest: T[]) => T): T[] {\n  if (items.length <= max) return items;\n  return [...items.slice(0, max - 1), merge(items.slice(max - 1))];\n}\n\n// One-hue magnitude ramp in the accent family. t = 0 recedes toward the stage, t = 1 is the\n// strongest step. Dark mode brightens with magnitude, light mode darkens, so \"more\" always reads\n// as more contrast against the surface.\nconst RAMP: Record<BjorkTone, readonly string[]> = {\n  dark: [\"#1d1611\", \"#3a2112\", \"#6a3013\", \"#a84514\", \"#ec5c13\", \"#ff9a5c\"],\n  light: [\"#f1e8dc\", \"#f3cfb2\", \"#eda57a\", \"#e07a43\", \"#b4531f\", \"#7a3412\"],\n};\n\nexport function rampColor(tone: BjorkTone, t: number): string {\n  const stops = RAMP[tone];\n  const x = clamp(Number.isFinite(t) ? t : 0, 0, 1) * (stops.length - 1);\n  const i = Math.min(stops.length - 2, Math.floor(x));\n  const a = parseColor(stops[i]);\n  const b = parseColor(stops[i + 1]);\n  const f = x - i;\n  return `rgb(${Math.round(lerp(a[0], b[0], f))},${Math.round(lerp(a[1], b[1], f))},${Math.round(lerp(a[2], b[2], f))})`;\n}\n\n// WCAG relative luminance of an sRGB colour.\nfunction relLum(color: string): number {\n  const [r, g, b] = parseColor(color).map((c) => {\n    const v = c / 255;\n    return v <= 0.04045 ? v / 12.92 : ((v + 0.055) / 1.055) ** 2.4;\n  });\n  return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n}\n\n// Light or dark ink for text on a filled mark, whichever has more WCAG contrast. The inks are\n// near-white (L ≈ 0.94) and near-black (L ≈ 0.009). Saturated orange gets dark ink; white text\n// only lands on the deeper rust steps, the same rule as --bjork-accent-fill.\nexport function inkOn(color: string): \"light\" | \"dark\" {\n  const L = relLum(color);\n  return (0.94 + 0.05) / (L + 0.05) >= (L + 0.05) / (0.009 + 0.05) ? \"light\" : \"dark\";\n}\n\n// Whether text on a ramp cell at `t` should use the light or dark ink.\nexport function rampInk(tone: BjorkTone, t: number): \"light\" | \"dark\" {\n  return inkOn(rampColor(tone, t));\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/charts/_kit/series.ts"
    }
  ],
  "cssVars": {
    "light": {
      "bjork-bg": "#f7f3ea",
      "bjork-surface": "#fffcf6",
      "bjork-surface-muted": "rgba(250, 246, 237, 0.94)",
      "bjork-surface-hover": "#f5efe3",
      "bjork-surface-active": "#efe7d8",
      "bjork-panel": "#f8f2e7",
      "bjork-menu": "rgba(255, 252, 246, 0.98)",
      "bjork-field": "rgba(255, 252, 246, 0.96)",
      "bjork-field-muted": "rgba(248, 242, 231, 0.82)",
      "bjork-field-inset": "rgba(239, 231, 216, 0.72)",
      "bjork-error-bg": "#fff0e8",
      "bjork-text": "#171717",
      "bjork-text-strong": "rgba(23, 23, 23, 0.9)",
      "bjork-text-medium": "rgba(23, 23, 23, 0.78)",
      "bjork-text-muted": "rgba(23, 23, 23, 0.68)",
      "bjork-text-soft": "rgba(23, 23, 23, 0.62)",
      "bjork-text-faint": "rgba(23, 23, 23, 0.22)",
      "bjork-inverted-text": "#fff8f0",
      "bjork-border": "#eee6db",
      "bjork-border-muted": "#f5ede2",
      "bjork-border-strong": "#e1d7c8",
      "bjork-thumb": "#a49b8e",
      "bjork-track": "#ded6ca",
      "bjork-accent": "#ec7d43",
      "bjork-accent-hover": "#f0935f",
      "bjork-accent-soft": "rgba(236, 125, 67, 0.1)",
      "bjork-accent-muted": "rgba(236, 125, 67, 0.2)",
      "bjork-accent-badge": "rgba(236, 125, 67, 0.16)",
      "bjork-accent-badge-foreground": "#8d421d",
      "bjork-accent-foreground": "#3f2112",
      "bjork-accent-fill": "#ec7d43",
      "bjork-accent-fill-hover": "#f0935f",
      "bjork-shadow-surface": "inset 0 7px 14px rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.92), inset 1px 0 0 rgba(88, 72, 49, 0.026), inset -1px 0 0 rgba(255, 255, 255, 0.68), 0 14px 22px -9px rgba(66, 52, 33, 0.11)",
      "bjork-shadow-soft": "inset 0 1px 0 rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.86)",
      "bjork-shadow-panel": "inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.64), 0 18px 38px -30px rgba(66, 52, 33, 0.2)",
      "bjork-shadow-menu": "inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 0 12px 24px rgba(88, 72, 49, 0.022), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.62), 0 22px 44px -26px rgba(66, 52, 33, 0.22)",
      "bjork-shadow-inset": "inset 0 1px 10px rgba(88, 72, 49, 0.12), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.72)",
      "bjork-ring-offset": "#f7f3ea"
    },
    "dark": {
      "bjork-bg": "#111111",
      "bjork-surface": "#121212",
      "bjork-surface-muted": "rgba(22, 22, 22, 0.92)",
      "bjork-surface-hover": "#161616",
      "bjork-surface-active": "#202020",
      "bjork-panel": "#0d0d0d",
      "bjork-menu": "rgba(18, 18, 18, 0.98)",
      "bjork-field": "rgba(18, 18, 18, 0.95)",
      "bjork-field-muted": "rgba(18, 18, 18, 0.55)",
      "bjork-field-inset": "rgba(9, 9, 9, 0.75)",
      "bjork-error-bg": "#130d0a",
      "bjork-text": "#ededed",
      "bjork-text-strong": "rgba(237, 237, 237, 0.9)",
      "bjork-text-medium": "rgba(237, 237, 237, 0.72)",
      "bjork-text-muted": "rgba(237, 237, 237, 0.6)",
      "bjork-text-soft": "rgba(237, 237, 237, 0.5)",
      "bjork-text-faint": "rgba(237, 237, 237, 0.22)",
      "bjork-inverted-text": "#080808",
      "bjork-border": "#232323",
      "bjork-border-muted": "#1c1c1c",
      "bjork-border-strong": "#343434",
      "bjork-thumb": "#626262",
      "bjork-track": "#090909",
      "bjork-accent": "#ec5c13",
      "bjork-accent-hover": "#f07832",
      "bjork-accent-soft": "rgba(236, 92, 19, 0.12)",
      "bjork-accent-muted": "rgba(236, 92, 19, 0.24)",
      "bjork-accent-badge": "#b84a12",
      "bjork-accent-badge-foreground": "#fff2ea",
      "bjork-accent-foreground": "#fff2ea",
      "bjork-accent-fill": "#b84a12",
      "bjork-accent-fill-hover": "#a84a14",
      "bjork-shadow-surface": "inset 0 7px 14px rgba(255, 255, 255, 0.03), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.06), 0 14px 20px -6px rgba(0, 0, 0, 0.45)",
      "bjork-shadow-soft": "inset 0 1px 0 rgba(255, 255, 255, 0.045)",
      "bjork-shadow-panel": "inset 0 1px 0 rgba(255, 255, 255, 0.035), 0 18px 36px -28px rgba(0, 0, 0, 0.9)",
      "bjork-shadow-menu": "inset 0 1px 0 rgba(255, 255, 255, 0.055), inset 0 12px 24px rgba(255, 255, 255, 0.018), inset 0 -18px 26px rgba(0, 0, 0, 0.24), 0 22px 42px -22px rgba(0, 0, 0, 0.9)",
      "bjork-shadow-inset": "inset 0 1px 10px rgba(0, 0, 0, 0.45)",
      "bjork-ring-offset": "#080808"
    }
  },
  "css": {
    ".bjork-range": {
      "box-shadow": "inset 0 1px 1px rgba(255, 255, 255, 0.04), 0 0 14px rgba(189, 69, 20, 0.06)"
    },
    ".bjork-range::-webkit-slider-thumb": {
      "appearance": "none",
      "width": "16px",
      "height": "8px",
      "border": "0",
      "border-radius": "999px",
      "background": "var(--bjork-thumb)",
      "box-shadow": "inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 0 0 1px rgba(0, 0, 0, 0.42)"
    },
    ".bjork-range::-moz-range-thumb": {
      "width": "16px",
      "height": "8px",
      "border": "0",
      "border-radius": "999px",
      "background": "var(--bjork-thumb)",
      "box-shadow": "inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 0 0 1px rgba(0, 0, 0, 0.42)"
    },
    ".bjork-layered-button-accent, .bjork-layered-button-raised": {
      "position": "relative",
      "isolation": "isolate",
      "appearance": "none",
      "overflow": "hidden",
      "border": "0",
      "border-radius": "13px",
      "box-shadow": "inset 0 1px 0 #ffffff38, 0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a",
      "transition": "filter 150ms ease-out, box-shadow 150ms ease-out"
    },
    ".bjork-layered-button-accent::after, .bjork-layered-button-raised::after": {
      "position": "absolute",
      "inset": "0",
      "pointer-events": "none",
      "content": "\"\"",
      "border": "1.5px solid transparent",
      "border-radius": "inherit",
      "background": "linear-gradient(#ffffffb8, #0000003d 41% 75%, #ffffff47) border-box",
      "mix-blend-mode": "overlay",
      "-webkit-mask-image": "linear-gradient(#000, #000), linear-gradient(#000, #000)",
      "mask-image": "linear-gradient(#000, #000), linear-gradient(#000, #000)",
      "-webkit-mask-clip": "padding-box, border-box",
      "mask-clip": "padding-box, border-box",
      "-webkit-mask-origin": "padding-box, border-box",
      "mask-origin": "padding-box, border-box",
      "-webkit-mask-composite": "xor",
      "mask-composite": "exclude"
    },
    ".bjork-layered-button-accent": {
      "color": "oklch(100% 0 0)",
      "text-shadow": "0 -1px #00000040",
      "background": "radial-gradient(ellipse at -20px top, rgba(255, 255, 255, 0.14), transparent), linear-gradient(180deg, #ec5c13 0%, #ec5c13 62%, color-mix(in oklab, #ec5c13 84%, black 16%) 100%)"
    },
    ".bjork-layered-button-raised": {
      "color": "oklch(100% 0 0)",
      "text-shadow": "0 -1px #00000026",
      "background": "radial-gradient(ellipse at -20px top, #ffffff38, #fff0), linear-gradient(180deg, oklch(0.1881 0.006 265), oklch(0.5493 0.0081 265))"
    },
    ".dark .bjork-layered-button-raised": {
      "color": "oklch(0.2574 0.0056 265)",
      "text-shadow": "0 -1px #00000026",
      "background": "radial-gradient(ellipse at -20px top, #ffffff38, #fff0), linear-gradient(180deg, color-mix(in oklab, oklch(0.9674 0.0013 265) 80%, oklch(0.2574 0.0056 265) 20%), color-mix(in oklab, oklch(0.669 0.0107 265) 80%, oklch(0.2574 0.0056 265) 20%))"
    },
    "@media (hover: hover)": {
      ".bjork-layered-button-accent:hover": {
        "filter": "brightness(1.08) saturate(1.04)"
      },
      ".bjork-layered-button-raised:hover": {
        "filter": "brightness(1.08) contrast(0.9)"
      }
    }
  },
  "meta": {
    "collection": "Charts",
    "registryUrl": "https://ui.isaiahbjork.com/cohort-retention.json",
    "installCommand": "npx shadcn@latest add https://ui.isaiahbjork.com/cohort-retention.json"
  },
  "type": "registry:component"
}