{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "correlation-matrix",
  "title": "Correlation matrix",
  "description": "Correlation matrix 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/correlation-matrix.tsx",
      "content": "\"use client\";\n\nimport { 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 { mulberry32 } from \"@/components/bjork-ui/_core/random\";\nimport { useChartCanvas, easeOut, hatchPattern, roundRectPath } from \"@/components/bjork-ui/charts/_kit/canvas\";\nimport {\n  useChartTheme,\n  chartFocusRing,\n  ChartTable,\n  placeTooltip,\n  HoverTooltip,\n  ChartAnnouncer,\n  type ChartPalette,\n  type TooltipHandle,\n  type AnnouncerHandle,\n  type TooltipContent,\n} from \"@/components/bjork-ui/charts/_kit/chrome\";\nimport { clamp, damp, mixColor, parseColor, gaussian } from \"@/components/bjork-ui/charts/_kit/scale\";\nimport { seriesColor } from \"@/components/bjork-ui/charts/_kit/series\";\n\nexport interface CorrelationMatrixProps {\n  labels: string[];\n  /** Symmetric matrix of coefficients in [-1, 1]. */\n  matrix: number[][];\n  order?: \"input\" | \"cluster\";\n  defaultOrder?: \"input\" | \"cluster\";\n  onOrderChange?: (order: \"input\" | \"cluster\") => void;\n  triangle?: \"lower\" | \"full\";\n  formatValue?: (r: number) => string;\n  /** Posed hover cell, by label index. */\n  activeCell?: [number, number] | null;\n  ariaLabel?: string;\n  tone?: BjorkTone;\n  attract?: boolean;\n  className?: string;\n}\n\nconst LABEL_W = 84;\nconst BOTTOM_LABELS = 64;\nconst TOP = 26;\nconst GAP = 2;\nconst VALUE_MIN_CELL = 30; // cells narrower than this hide their numbers\nconst MOVE_TAU = 0.15;\nconst ENTER_MS = 900;\nconst CELL_MS = 360;\nconst ATTRACT_STEP_MS = 3400;\nconst ATTRACT_IDLE_MS = 4000;\n\nconst clock = () => performance.now();\nconst defaultFormatValue = (r: number) => `${r < 0 ? \"−\" : \"\"}${Math.abs(r).toFixed(2).replace(/^0/, \"\")}`;\n\n// Average-linkage agglomerative clustering on 1 - r, returning the leaf order.\nexport function clusterOrder(matrix: number[][]): number[] {\n  const n = matrix.length;\n  let clusters: { items: number[] }[] = Array.from({ length: n }, (_, i) => ({ items: [i] }));\n  const dist = (a: number[], b: number[]) => {\n    let s = 0;\n    for (const i of a) for (const j of b) s += 1 - (matrix[i]?.[j] ?? 0);\n    return s / (a.length * b.length);\n  };\n  while (clusters.length > 1) {\n    let best = [0, 1];\n    let bd = Infinity;\n    for (let i = 0; i < clusters.length; i++)\n      for (let j = i + 1; j < clusters.length; j++) {\n        const d = dist(clusters[i].items, clusters[j].items);\n        if (d < bd) {\n          bd = d;\n          best = [i, j];\n        }\n      }\n    const [a, b] = best;\n    // Orient the merge so the closest ends meet.\n    const A = clusters[a].items;\n    const B = clusters[b].items;\n    const opts = [\n      [...A, ...B],\n      [...A, ...[...B].reverse()],\n      [...[...A].reverse(), ...B],\n      [...B, ...A],\n    ];\n    const joinCost = (seq: number[]) => 1 - (matrix[seq[A.length - 1]]?.[seq[A.length]] ?? 0);\n    const merged = opts.reduce((m, o) => (joinCost(o) < joinCost(m) ? o : m), opts[0]);\n    clusters = clusters.filter((_, k) => k !== a && k !== b);\n    clusters.push({ items: merged });\n  }\n  return clusters[0]?.items ?? [];\n}\n\n// Diverging scale: two poles (accent for positive, the series blue for negative, a CVD-safe pair)\n// meeting at the stage colour at zero.\nfunction poles(pal: ChartPalette, tone: BjorkTone) {\n  return { pos: pal.accent, neg: seriesColor(tone, 1), mid: pal.stage };\n}\n\nfunction cellFill(pal: ChartPalette, tone: BjorkTone, r: number): { fill: string; ink: string } {\n  // Power-curve intensity, capped below full so the grid never turns into solid blocks.\n  const a = 0.05 + 0.7 * Math.pow(clamp(Math.abs(r), 0, 1), 0.8);\n  const { pos, neg, mid } = poles(pal, tone);\n  const fill = mixColor(mid, r >= 0 ? pos : neg, a);\n  return { fill, ink: inkOn(fill) };\n}\n\n// Dark or light text for a cell, from the fill's relative luminance.\nconst INK_DARK = \"rgba(23,23,23,0.86)\";\nconst INK_LIGHT = \"rgba(237,237,237,0.9)\";\nfunction inkOn(fill: string): string {\n  const [r, g, b] = parseColor(fill);\n  const lin = (c: number) => {\n    const v = c / 255;\n    return v <= 0.04045 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);\n  };\n  const L = 0.2126 * lin(r) + 0.7152 * lin(g) + 0.0722 * lin(b);\n  // The crossover where both inks give the same contrast ratio.\n  return L > 0.18 ? INK_DARK : INK_LIGHT;\n}\n\nfunction describeR(r: number): string {\n  const a = Math.abs(r);\n  const s = a >= 0.7 ? \"strong\" : a >= 0.4 ? \"moderate\" : a >= 0.2 ? \"weak\" : \"negligible\";\n  return a < 0.2 ? s : `${s} ${r > 0 ? \"positive\" : \"negative\"}`;\n}\n\ninterface Run {\n  pos: number[]; // displayed slot per label\n  ready: boolean;\n  enter: number;\n  hover: [number, number] | null;\n  source: \"pointer\" | \"keyboard\" | \"prop\" | \"attract\" | null;\n  cell: number;\n  ox: number;\n  oy: number;\n  lastInput: number;\n  attractAt: number;\n}\n\n// Style writes from the draw loop only when the value changes: a hover frame touches ~90 spans,\n// and rewriting identical styles still costs a recalc on each of them.\nconst written = new WeakMap<HTMLElement, { opacity?: string; transform?: string; color?: string }>();\nfunction put(el: HTMLElement, prop: \"opacity\" | \"transform\" | \"color\", value: string) {\n  let w = written.get(el);\n  if (!w) written.set(el, (w = {}));\n  if (w[prop] === value) return;\n  w[prop] = value;\n  el.style[prop] = value;\n}\n\nexport function CorrelationMatrix({\n  labels,\n  matrix,\n  order: orderProp,\n  defaultOrder = \"input\",\n  onOrderChange,\n  triangle = \"lower\",\n  formatValue = defaultFormatValue,\n  activeCell,\n  ariaLabel = \"Correlation matrix\",\n  tone: toneProp,\n  attract = false,\n  className,\n}: CorrelationMatrixProps) {\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 rowRefs = useRef<(HTMLSpanElement | null)[]>([]);\n  const colRefs = useRef<(HTMLSpanElement | null)[]>([]);\n  const valueRefs = useRef<(HTMLSpanElement | null)[]>([]);\n  const rectRef = useRef<DOMRect | null>(null);\n  const [orderState, setOrderState] = useState<\"input\" | \"cluster\">(defaultOrder);\n  const [attractOrder, setAttractOrder] = useState<\"input\" | \"cluster\" | null>(null);\n  const orderMode = attract && attractOrder ? attractOrder : (orderProp ?? orderState);\n  const n = labels.length;\n\n  const clustered = useMemo(() => clusterOrder(matrix), [matrix]);\n  const order = useMemo(() => (orderMode === \"cluster\" ? clustered : labels.map((_, i) => i)), [orderMode, clustered, labels]);\n  const slot = useMemo(() => {\n    const s = new Array<number>(n);\n    order.forEach((li, k) => (s[li] = k));\n    return s;\n  }, [order, n]);\n\n  const cfg = useRef({ matrix, slot, triangle, reduce, pal, tone, formatValue, attract, n });\n  useEffect(() => {\n    cfg.current = { matrix, slot, triangle, reduce, pal, tone, formatValue, attract, n };\n  });\n\n  const st = useRef<Run>({ pos: [], ready: false, enter: 0, hover: null, source: null, cell: 20, ox: LABEL_W, oy: TOP, lastInput: 0, attractAt: 0 });\n  const orderSetter = useRef<(o: \"input\" | \"cluster\") => void>(() => {});\n\n  const { rootRef, hostRef, canvasRef, size, wake } = useChartCanvas(({ ctx, w, h, dt }) => {\n    const s = st.current;\n    const c = cfg.current;\n    const p = c.pal;\n    const N = c.n;\n    const cell = Math.max(10, Math.floor((w - LABEL_W - 4) / Math.max(1, N)));\n    s.cell = cell;\n    const ox = LABEL_W;\n    const oy = TOP;\n    s.ox = ox;\n    s.oy = oy;\n\n    let moving = false;\n    for (let i = 0; i < N; i++) {\n      if (!s.ready || c.reduce || s.pos[i] === undefined) s.pos[i] = c.slot[i];\n      else {\n        s.pos[i] = damp(s.pos[i], c.slot[i], MOVE_TAU, dt);\n        if (Math.abs(s.pos[i] - c.slot[i]) > 0.002) moving = true;\n        else s.pos[i] = c.slot[i];\n      }\n    }\n    s.pos.length = N;\n    s.ready = true;\n    s.enter = c.reduce ? 1 : Math.min(1, s.enter + (dt * 1000) / ENTER_MS);\n    const ms = s.enter * ENTER_MS;\n    const growOf = (a: number, b: number) => (s.enter >= 1 ? 1 : easeOut(clamp((ms - ((a + b) / Math.max(1, 2 * N - 2)) * (ENTER_MS - CELL_MS)) / CELL_MS, 0, 1)));\n\n    const hov = s.hover;\n    const hatch = hatchPattern(ctx, mixColor(p.stage, p.text, 0.16), 4, 1);\n    let vi = 0;\n    // Row and column bands behind the hovered cell.\n    if (hov) {\n      const [hr, hc] = hov;\n      ctx.fillStyle = mixColor(p.stage, p.text, 0.035);\n      // In the lower triangle the bands stop at the diagonal.\n      const lower = c.triangle === \"lower\";\n      ctx.fillRect(ox, oy + s.pos[hr] * cell, cell * (lower ? s.pos[hr] + 1 : N), cell);\n      ctx.fillRect(ox + s.pos[hc] * cell, oy + (lower ? s.pos[hc] * cell : 0), cell, cell * (lower ? N - s.pos[hc] : N));\n    }\n    for (let i = 0; i < N; i++) {\n      for (let j = 0; j < N; j++) {\n        // Lower triangle uses displayed slots, so a cell moves across the diagonal smoothly.\n        if (c.triangle === \"lower\" && c.slot[j] > c.slot[i]) continue;\n        const r = c.matrix[i]?.[j] ?? 0;\n        const x = ox + s.pos[j] * cell;\n        const y = oy + s.pos[i] * cell;\n        const g = growOf(c.slot[i], c.slot[j]);\n        if (g <= 0) continue;\n        const inset = GAP / 2 + (1 - g) * (cell / 2 - 1);\n        const isHov = !!hov && hov[0] === i && hov[1] === j;\n        const dim = hov && !isHov && hov[0] !== i && hov[1] !== j ? 0.55 : 1;\n        ctx.globalAlpha = dim;\n        ctx.beginPath();\n        roundRectPath(ctx, x + inset, y + inset, cell - inset * 2, cell - inset * 2, Math.min(3, cell / 6), Math.min(3, cell / 6));\n        if (i === j) {\n          ctx.fillStyle = mixColor(p.stage, p.text, 0.05);\n          ctx.fill();\n          if (hatch) {\n            ctx.fillStyle = hatch;\n            ctx.fill();\n          }\n        } else {\n          const { fill, ink } = cellFill(p, c.tone, r);\n          ctx.fillStyle = fill;\n          ctx.fill();\n          // Without numbers, sign must not rest on hue alone: negative cells carry a minus bar.\n          if (cell < VALUE_MIN_CELL && r < 0 && g > 0.6) {\n            const bw = Math.max(4, Math.round(cell * 0.34));\n            ctx.fillStyle = ink;\n            ctx.fillRect(Math.round(x + cell / 2 - bw / 2), Math.round(y + cell / 2) - 0.75, bw, 1.5);\n          }\n        }\n        if (isHov) {\n          ctx.globalAlpha = 1;\n          ctx.lineWidth = 1.5;\n          ctx.strokeStyle = p.text;\n          ctx.stroke();\n        }\n        ctx.globalAlpha = 1;\n        // Values inside cells big enough to hold them.\n        if (i !== j && cell >= VALUE_MIN_CELL) {\n          const el = valueRefs.current[vi++];\n          if (el) {\n            const text = c.formatValue(r);\n            if (el.textContent !== text) el.textContent = text;\n            put(el, \"color\", cellFill(p, c.tone, r).ink);\n            put(el, \"opacity\", String(clamp((g - 0.6) / 0.4, 0, 1) * dim));\n            put(el, \"transform\", `translate3d(${(x + cell / 2).toFixed(1)}px, ${(y + cell / 2).toFixed(1)}px, 0) translate(-50%, -50%)`);\n          }\n        }\n      }\n    }\n    for (let k = vi; k < valueRefs.current.length; k++) {\n      const el = valueRefs.current[k];\n      if (el) put(el, \"opacity\", \"0\");\n    }\n\n    // Labels ride their slots.\n    for (let i = 0; i < N; i++) {\n      const on = !hov || hov[0] === i || hov[1] === i;\n      const R = rowRefs.current[i];\n      if (R) {\n        put(R, \"transform\", `translate3d(${(ox - 8).toFixed(1)}px, ${(oy + s.pos[i] * cell + cell / 2).toFixed(1)}px, 0) translate(-100%, -50%)`);\n        if (R.dataset.on !== (on ? \"1\" : \"0\")) R.dataset.on = on ? \"1\" : \"0\";\n        put(R, \"opacity\", String(Math.min(1, s.enter * 2)));\n      }\n      const C = colRefs.current[i];\n      if (C) {\n        put(C, \"transform\", `translate3d(${(ox + s.pos[i] * cell + cell / 2).toFixed(1)}px, ${(oy + N * cell + 8).toFixed(1)}px, 0) translateX(-100%) rotate(-40deg)`);\n        if (C.dataset.on !== (on ? \"1\" : \"0\")) C.dataset.on = on ? \"1\" : \"0\";\n        put(C, \"opacity\", String(Math.min(1, s.enter * 2)));\n      }\n    }\n\n    const tip = tipRef.current;\n    if (tip?.el && hov) {\n      const pos = placeTooltip(ox + s.pos[hov[1]] * cell + cell, oy + s.pos[hov[0]] * cell, tip.size.w, tip.size.h, w, h, 8);\n      tip.el.style.transform = `translate3d(${pos.x}px, ${pos.y}px, 0)`;\n    }\n\n    if (c.attract && !c.reduce && (!s.lastInput || clock() - s.lastInput > ATTRACT_IDLE_MS)) {\n      if (clock() - s.attractAt > ATTRACT_STEP_MS) {\n        s.attractAt = clock();\n        orderSetter.current(c.slot.every((v, i) => v === i) ? \"cluster\" : \"input\");\n      }\n      return true;\n    }\n    return moving || s.enter < 1;\n  });\n\n  useEffect(() => {\n    orderSetter.current = (o) => setAttractOrder(o);\n  });\n\n  const cell = Math.max(10, Math.floor(((size.width || 600) - LABEL_W - 4) / Math.max(1, n)));\n  const height = TOP + n * cell + BOTTOM_LABELS;\n\n  useEffect(() => {\n    wake();\n  }, [matrix, slot, triangle, pal, reduce, attract, wake]);\n\n  const tooltipFor = (i: number, j: number): TooltipContent => {\n    const r = matrix[i]?.[j] ?? 0;\n    return {\n      key: `${i}|${j}|${pal.text}`,\n      title: `${labels[i]} × ${labels[j]}`,\n      rows: [{ key: \"r\", label: i === j ? \"self\" : describeR(r), value: `r ${formatValue(r)}`, color: i === j ? undefined : cellFill(pal, tone, r).fill }],\n    };\n  };\n\n  const setHover = (cellIdx: [number, number] | null, source: Run[\"source\"]) => {\n    const s = st.current;\n    const same = (!cellIdx && !s.hover) || (cellIdx && s.hover && cellIdx[0] === s.hover[0] && cellIdx[1] === s.hover[1]);\n    s.hover = cellIdx;\n    s.source = cellIdx ? source : null;\n    if (!same) {\n      tipRef.current?.set(cellIdx ? tooltipFor(cellIdx[0], cellIdx[1]) : null);\n      if (cellIdx && source === \"keyboard\") {\n        const r = matrix[cellIdx[0]]?.[cellIdx[1]] ?? 0;\n        announcer.current?.say(`${labels[cellIdx[0]]} and ${labels[cellIdx[1]]}: r ${formatValue(r)}, ${describeR(r)}`);\n      }\n    }\n    wake();\n  };\n\n  useEffect(() => {\n    if (activeCell === undefined) return;\n    setHover(activeCell, activeCell ? \"prop\" : null);\n    // eslint-disable-next-line react-hooks/exhaustive-deps\n  }, [activeCell?.[0], activeCell?.[1], pal]);\n\n  const setOrder = (o: \"input\" | \"cluster\") => {\n    setAttractOrder(null);\n    if (orderProp === undefined) setOrderState(o);\n    onOrderChange?.(o);\n    announcer.current?.say(o === \"cluster\" ? \"Ordered by cluster\" : \"Original order\");\n  };\n\n  const onPointerMove = (e: PointerEvent<HTMLDivElement>) => {\n    st.current.lastInput = clock();\n    const rect = rectRef.current ?? wrapperRef.current?.getBoundingClientRect();\n    if (!rect) return;\n    const s = st.current;\n    const sx = Math.floor((e.clientX - rect.left - s.ox) / s.cell);\n    const sy = Math.floor((e.clientY - rect.top - s.oy) / s.cell);\n    if (sx < 0 || sy < 0 || sx >= n || sy >= n || (triangle === \"lower\" && sx > sy)) {\n      setHover(null, null);\n      return;\n    }\n    setHover([order[sy], order[sx]], \"pointer\");\n  };\n\n  const onKeyDown = (e: KeyboardEvent<HTMLDivElement>) => {\n    const s = st.current;\n    s.lastInput = clock();\n    if (e.key === \"o\" || e.key === \"O\") {\n      e.preventDefault();\n      setOrder(orderMode === \"cluster\" ? \"input\" : \"cluster\");\n      return;\n    }\n    if (e.key === \"Escape\") {\n      setHover(null, null);\n      return;\n    }\n    if (!e.key.startsWith(\"Arrow\") && e.key !== \"Home\" && e.key !== \"End\") return;\n    e.preventDefault();\n    // Navigate in displayed slots. Home and End jump to the ends of the current row.\n    let ry = s.hover ? slot[s.hover[0]] : n - 1;\n    let cx = s.hover ? slot[s.hover[1]] : 0;\n    if (e.key === \"Home\") cx = 0;\n    else if (e.key === \"End\") cx = triangle === \"lower\" ? ry : n - 1;\n    else if (s.hover && s.source !== \"attract\") {\n      if (e.key === \"ArrowUp\") ry--;\n      if (e.key === \"ArrowDown\") ry++;\n      if (e.key === \"ArrowLeft\") cx--;\n      if (e.key === \"ArrowRight\") cx++;\n    }\n    ry = clamp(ry, 0, n - 1);\n    cx = clamp(cx, 0, n - 1);\n    if (triangle === \"lower\" && cx > ry) {\n      if (e.key === \"ArrowRight\") cx = ry;\n      else ry = cx;\n    }\n    setHover([order[ry], order[cx]], \"keyboard\");\n  };\n\n  const tableRows = useMemo(() => labels.map((l, i) => [l, ...labels.map((_, j) => formatValue(matrix[i]?.[j] ?? 0))]), [labels, matrix, formatValue]);\n  const tableCols = useMemo(() => [\"\", ...labels], [labels]);\n  const valueSlots = triangle === \"lower\" ? (n * (n - 1)) / 2 : n * (n - 1);\n  const legendRamp = useMemo(() => {\n    const stops = [-1, -0.5, -0.15, 0, 0.15, 0.5, 1].map((r) => `${cellFill(pal, tone, r).fill} ${((r + 1) / 2) * 100}%`);\n    return `linear-gradient(90deg, ${stops.join(\", \")})`;\n  }, [pal, tone]);\n  const summary = useMemo(() => {\n    let best: [number, number, number] | null = null;\n    let worst: [number, number, number] | null = null;\n    for (let i = 0; i < n; i++)\n      for (let j = 0; j < i; j++) {\n        const r = matrix[i]?.[j] ?? 0;\n        if (!best || r > best[2]) best = [i, j, r];\n        if (!worst || r < worst[2]) worst = [i, j, r];\n      }\n    const say = (t: [number, number, number] | null) => (t ? `${labels[t[0]]} and ${labels[t[1]]} at ${formatValue(t[2])}` : \"none\");\n    return `${ariaLabel}: ${n} variables, ${orderMode === \"cluster\" ? \"clustered\" : \"original\"} order. Strongest positive ${say(best)}; most negative ${say(worst)}.`;\n  }, [matrix, n, labels, formatValue, ariaLabel, orderMode]);\n\n  return (\n    <div ref={rootRef} data-loop=\"idle\" className={cn(\"relative w-full select-none text-[color:var(--bjork-text)]\", className)} style={{ ...vars, height }}>\n      <div aria-hidden=\"true\" className=\"pointer-events-none absolute right-0 top-[3px] flex items-center gap-1.5 font-mono text-[10px] leading-none tabular-nums text-[color:var(--bjork-text-soft)]\">\n        <span className=\"[text-box:trim-both_cap_alphabetic]\">{\"−\"}1 negative</span>\n        <span className=\"relative inline-block h-[6px] w-24 rounded-full shadow-[inset_0_0_0_1px_var(--bjork-hair)]\" style={{ background: legendRamp }}>\n          <span className=\"absolute -bottom-[3px] -top-[3px] left-1/2 w-px -translate-x-1/2 bg-[color:var(--bjork-text-faint)]\" />\n        </span>\n        <span className=\"[text-box:trim-both_cap_alphabetic]\">positive +1</span>\n      </div>\n      <div\n        ref={wrapperRef}\n        role=\"group\"\n        aria-roledescription=\"chart\"\n        aria-label={`${ariaLabel}. Arrow keys move between cells, Home and End jump along the row, O switches between the original and clustered order, Escape clears.`}\n        tabIndex={0}\n        onPointerEnter={() => {\n          if (wrapperRef.current) rectRef.current = wrapperRef.current.getBoundingClientRect();\n        }}\n        onPointerMove={onPointerMove}\n        onPointerDown={(e) => {\n          if (wrapperRef.current) rectRef.current = wrapperRef.current.getBoundingClientRect();\n          if (e.pointerType === \"touch\") onPointerMove(e);\n        }}\n        onPointerLeave={() => setHover(null, null)}\n        onKeyDown={onKeyDown}\n        className={cn(\"absolute inset-0 cursor-crosshair touch-pan-y rounded-[10px]\", chartFocusRing)}\n      >\n        <div ref={hostRef} className=\"absolute inset-0\">\n          <canvas ref={canvasRef} role=\"img\" aria-label={summary} className=\"pointer-events-none absolute left-0 top-0\" />\n        </div>\n        {labels.map((l, i) => (\n          <span\n            key={`r-${i}`}\n            ref={(el) => {\n              rowRefs.current[i] = el;\n            }}\n            aria-hidden=\"true\"\n            className=\"pointer-events-none absolute left-0 top-0 max-w-[80px] truncate font-bjork-alpha text-[11px] font-medium leading-[13px] text-[color:var(--bjork-text-muted)] opacity-0 transition-colors duration-100 data-[on=1]:text-[color:var(--bjork-text)]\"\n          >\n            {l}\n          </span>\n        ))}\n        {labels.map((l, i) => (\n          <span\n            key={`c-${i}`}\n            ref={(el) => {\n              colRefs.current[i] = el;\n            }}\n            aria-hidden=\"true\"\n            className=\"pointer-events-none absolute left-0 top-0 origin-top-right whitespace-nowrap font-bjork-alpha text-[11px] font-medium leading-[13px] text-[color:var(--bjork-text-muted)] opacity-0 transition-colors duration-100 data-[on=1]:text-[color:var(--bjork-text)]\"\n          >\n            {l}\n          </span>\n        ))}\n        {Array.from({ length: valueSlots }).map((_, k) => (\n          <span\n            key={k}\n            ref={(el) => {\n              valueRefs.current[k] = el;\n            }}\n            aria-hidden=\"true\"\n            className=\"pointer-events-none absolute left-0 top-0 font-mono text-[10px] leading-none tabular-nums opacity-0 [text-box:trim-both_cap_alphabetic]\"\n          />\n        ))}\n        <HoverTooltip ref={tipRef} onMeasure={wake} />\n      </div>\n      <ChartTable caption={ariaLabel} columns={tableCols} rows={tableRows} />\n      <ChartAnnouncer ref={announcer} />\n    </div>\n  );\n}\n\n// Seeded demo matrix: assets driven by a few shared factors, so clusters exist.\nexport function createCorrelationDemo(seed: number): { labels: string[]; matrix: number[][] } {\n  const rnd = mulberry32(seed);\n  const labels = [\"US equities\", \"Gold\", \"EU equities\", \"Treasuries\", \"Oil\", \"Bitcoin\", \"Bunds\", \"Tech\", \"Copper\", \"Dollar\", \"Ether\", \"EM equities\"];\n  // Factor loadings: growth, rates, crypto, commodities.\n  const loads: Record<string, number[]> = {\n    \"US equities\": [0.9, -0.2, 0.2, 0.1],\n    \"EU equities\": [0.85, -0.15, 0.1, 0.2],\n    \"EM equities\": [0.75, -0.25, 0.15, 0.35],\n    Tech: [0.88, -0.35, 0.35, 0],\n    Treasuries: [-0.3, 0.9, 0, -0.1],\n    Bunds: [-0.25, 0.85, 0, -0.05],\n    Gold: [0, 0.35, 0.1, 0.55],\n    Oil: [0.3, -0.2, 0, 0.8],\n    Copper: [0.45, -0.1, 0, 0.75],\n    Dollar: [-0.4, 0.2, -0.2, -0.5],\n    Bitcoin: [0.35, -0.1, 0.9, 0],\n    Ether: [0.38, -0.1, 0.88, 0],\n  };\n  const vecs = labels.map((l) => loads[l].map((v) => v + gaussian(rnd) * 0.06));\n  const matrix = vecs.map((a) =>\n    vecs.map((b) => {\n      const dot = a.reduce((s, v, k) => s + v * b[k], 0);\n      const na = Math.sqrt(a.reduce((s, v) => s + v * v, 0));\n      const nb = Math.sqrt(b.reduce((s, v) => s + v * v, 0));\n      return clamp(dot / (na * nb), -1, 1);\n    }),\n  );\n  return { labels, matrix };\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/charts/correlation-matrix.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/_core/random.ts",
      "content": "// Seeded randomness and noise. Deterministic for a given seed, so previews and tests repeat.\n\n// Small fast PRNG. Returns floats in [0, 1).\nexport function mulberry32(seed: number): () => number {\n  let a = seed >>> 0;\n  return () => {\n    a = (a + 0x6d2b79f5) >>> 0;\n    let t = a;\n    t = Math.imul(t ^ (t >>> 15), t | 1);\n    t ^= t + Math.imul(t ^ (t >>> 7), t | 61);\n    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;\n  };\n}\n\n// FNV-1a 32-bit.\nexport function hashString(s: string): number {\n  let h = 0x811c9dc5;\n  for (let i = 0; i < s.length; i++) {\n    h ^= s.charCodeAt(i);\n    h = Math.imul(h, 0x01000193);\n  }\n  return h >>> 0;\n}\n\n// Integer lattice hash to [-1, 1].\nfunction latticeHash(seed: number, x: number, y = 0): number {\n  let h = Math.imul(x | 0, 374761393) ^ Math.imul(y | 0, 668265263) ^ Math.imul(seed | 0, 2246822519);\n  h = Math.imul(h ^ (h >>> 13), 1274126177);\n  h ^= h >>> 16;\n  return ((h >>> 0) / 4294967295) * 2 - 1;\n}\n\nfunction smooth(t: number): number {\n  return t * t * (3 - 2 * t);\n}\n\nexport function valueNoise1D(seed: number): (x: number) => number {\n  return (x: number) => {\n    const i = Math.floor(x);\n    const f = x - i;\n    const a = latticeHash(seed, i);\n    const b = latticeHash(seed, i + 1);\n    return a + (b - a) * smooth(f);\n  };\n}\n\nexport function fbm1D(seed: number, octaves = 3): (x: number) => number {\n  const layers = Array.from({ length: octaves }, (_, o) => valueNoise1D(seed + o * 101));\n  let norm = 0;\n  for (let o = 0; o < octaves; o++) norm += 0.5 ** o;\n  return (x: number) => {\n    let sum = 0;\n    let amp = 1;\n    let freq = 1;\n    for (let o = 0; o < octaves; o++) {\n      sum += amp * layers[o](x * freq);\n      amp *= 0.5;\n      freq *= 2;\n    }\n    return sum / norm;\n  };\n}\n\nexport function valueNoise2D(seed: number): (x: number, y: number) => number {\n  return (x: number, y: number) => {\n    const xi = Math.floor(x);\n    const yi = Math.floor(y);\n    const fx = smooth(x - xi);\n    const fy = smooth(y - yi);\n    const a = latticeHash(seed, xi, yi);\n    const b = latticeHash(seed, xi + 1, yi);\n    const c = latticeHash(seed, xi, yi + 1);\n    const d = latticeHash(seed, xi + 1, yi + 1);\n    const top = a + (b - a) * fx;\n    const bottom = c + (d - c) * fx;\n    return top + (bottom - top) * fy;\n  };\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/random.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/correlation-matrix.json",
    "installCommand": "npx shadcn@latest add https://ui.isaiahbjork.com/correlation-matrix.json"
  },
  "type": "registry:component"
}