// Pixel art — cohesive sprite system, one density throughout. Ported from art.jsx.
// All visuals are procedural canvas, rendered client-side, so the server spends ~0 CPU on
// art and the game stays fully local — no image models, no external services.
import { BAYER4, ditherGrad } from './draw'
import type { Pal } from './draw'
import type { ScenePainter } from './pixel'

type Grid = string[][]
interface Sprite {
  pal: Pal
  frames: string[][]
  px: number
}
interface PortraitOpts {
  skin: string
  skinS: string
  hair: string
  hairHl: string
  style?: string
  cloth: string
  clothHl: string
  accent: string
  lip?: string
  tie?: string
  beard?: string
  stubble?: boolean
  glasses?: string
  hat?: string
  hatBrim?: string
  hatHl?: string
  skinHi?: string
  legs?: string
}

export const SPAL: Record<string, string> = {
  k: '#080c11', K: '#04070b',
  '1': '#e7b48d', '2': '#c4895f', '3': '#945d40',
  '4': '#ead0b8', '5': '#c19b80',
  '6': '#a76b44', '7': '#7c4d2e',
  '8': '#74492e', '9': '#543521',
  p: '#a8554c',
  h: '#16191f', H: '#2a2f39', r: '#43301f', R: '#65492b', y: '#8d8c82', Y: '#b8b7ad',
  u: '#6d3920', U: '#92542f', b: '#c19341', B: '#e3c06d', w0: '#3a3a40',
  e: '#0e1119', o: '#ded7c3',
  t: '#284149', T: '#37636b', m: '#1c222a', M: '#2d3640', x: '#5f1f1f', X: '#87292a',
  w: '#b7b09a', W: '#d4cdb7', n: '#b3742d', N: '#dba04a', i: '#cfc8b2', I: '#9d977f',
  g: '#39474f', G: '#536a72', c: '#d2d8dc',
}

function blank(W: number, H: number): Grid {
  return Array.from({ length: H }, () => Array(W).fill('.'))
}
function setpx(g: Grid, x: number, y: number, c: string): void {
  if (y >= 0 && y < g.length && x >= 0 && x < g[0].length) g[y][x] = c
}
function fillrect(g: Grid, x: number, y: number, w: number, h: number, c: string): void {
  for (let j = 0; j < h; j++) for (let i = 0; i < w; i++) setpx(g, x + i, y + j, c)
}

const HEAD: Record<number, [number, number]> = {
  4: [7, 14], 5: [6, 15], 6: [5, 16], 7: [5, 16], 8: [5, 16], 9: [5, 16], 10: [5, 16],
  11: [5, 16], 12: [5, 16], 13: [6, 15], 14: [6, 15], 15: [6, 15], 16: [7, 14], 17: [8, 13],
}

export function makePortrait(o: PortraitOpts): Sprite {
  const sk = o.skin
  const skS = o.skinS
  const build = (blink: boolean, talk = false): string[] => {
    const g = blank(22, 24)
    fillrect(g, 9, 17, 4, 3, sk)
    fillrect(g, 9, 18, 4, 1, skS)
    fillrect(g, 2, 20, 18, 4, o.cloth)
    for (let x = 2; x < 20; x++) setpx(g, x, 20, o.clothHl)
    setpx(g, 9, 20, o.accent)
    setpx(g, 12, 20, o.accent)
    setpx(g, 10, 21, o.accent)
    setpx(g, 11, 21, o.accent)
    if (o.tie) {
      setpx(g, 10, 21, o.tie); setpx(g, 11, 21, o.tie); setpx(g, 10, 22, o.tie); setpx(g, 11, 22, o.tie)
    }
    for (const y in HEAD) {
      const [a, bx] = HEAD[+y]
      for (let x = a; x <= bx; x++) setpx(g, x, +y, sk)
    }
    for (const y in HEAD) {
      const [, bx] = HEAD[+y]
      setpx(g, bx, +y, skS); setpx(g, bx - 1, +y, skS)
    }
    setpx(g, 7, 16, skS); setpx(g, 13, 16, skS)
    if (o.beard) {
      for (let x = 6; x <= 15; x++) setpx(g, x, 15, o.beard)
      fillrect(g, 7, 16, 7, 2, o.beard)
      setpx(g, 9, 15, sk); setpx(g, 12, 15, sk)
    }
    if (o.stubble) {
      for (let x = 6; x <= 15; x++) if ((x + 1) % 2) setpx(g, x, 16, skS)
    }
    fillrect(g, 7, 9, 3, 1, o.hair)
    fillrect(g, 12, 9, 3, 1, o.hair)
    if (blink) {
      setpx(g, 8, 11, skS); setpx(g, 9, 11, skS); setpx(g, 13, 11, skS); setpx(g, 14, 11, skS)
    } else {
      setpx(g, 8, 11, 'o'); setpx(g, 9, 11, 'e'); setpx(g, 13, 11, 'e'); setpx(g, 14, 11, 'o')
      setpx(g, 8, 10, skS); setpx(g, 14, 10, skS)
    }
    setpx(g, 11, 12, skS); setpx(g, 11, 13, skS); setpx(g, 10, 13, skS)
    fillrect(g, 9, 15, 4, 1, o.lip || 'p')
    if (o.beard) fillrect(g, 9, 15, 4, 1, '#7a3f3a')
    // Talking frame: the jaw drops into a small dark opening (synced to the voice).
    if (talk) { setpx(g, 10, 15, 'k'); setpx(g, 11, 15, 'k'); setpx(g, 10, 16, 'k'); setpx(g, 11, 16, 'k') }
    setpx(g, 7, 12, o.skinHi || sk)
    const H = o.hair
    const Hl = o.hairHl
    const top = () => {
      fillrect(g, 5, 3, 12, 3, H)
      for (let x = 6; x <= 15; x++) setpx(g, x, 3, Hl)
    }
    const sides = (to: number) => {
      for (let y = 4; y <= to; y++) {
        setpx(g, 5, y, H); setpx(g, 16, y, H)
      }
    }
    if (o.style === 'short') {
      top(); fillrect(g, 5, 5, 12, 2, H); sides(8); setpx(g, 5, 4, H); setpx(g, 16, 4, H)
    } else if (o.style === 'slick') {
      fillrect(g, 6, 3, 10, 3, H); for (let x = 6; x < 13; x++) setpx(g, x, 3, Hl); sides(7)
    } else if (o.style === 'long') {
      top(); fillrect(g, 5, 5, 12, 2, H); sides(17); fillrect(g, 4, 8, 2, 9, H); fillrect(g, 16, 8, 2, 9, H)
    } else if (o.style === 'bun') {
      top(); fillrect(g, 5, 5, 12, 1, H); sides(7); fillrect(g, 8, 1, 6, 3, H); for (let x = 9; x < 13; x++) setpx(g, x, 1, Hl)
    } else if (o.style === 'curly') {
      for (let x = 5; x <= 16; x++) { const yy = 3 + (x % 2); setpx(g, x, yy, H); setpx(g, x, 3, H) }
      fillrect(g, 5, 4, 12, 3, H); for (let x = 6; x < 16; x += 2) setpx(g, x, 3, Hl); sides(9); setpx(g, 4, 6, H); setpx(g, 17, 6, H)
    } else if (o.style === 'bald') {
      for (let y = 7; y <= 10; y++) { setpx(g, 5, y, H); setpx(g, 16, y, H) }
      setpx(g, 6, 12, skS)
    } else if (o.style === 'wave') {
      top(); fillrect(g, 5, 5, 12, 2, H); for (let x = 6; x < 16; x += 3) setpx(g, x, 5, Hl); sides(8)
    }
    if (o.glasses) {
      const gl = o.glasses
      setpx(g, 7, 10, gl); setpx(g, 9, 10, gl); setpx(g, 7, 11, gl); setpx(g, 7, 12, gl); setpx(g, 9, 11, gl); setpx(g, 9, 12, gl); setpx(g, 8, 12, gl)
      setpx(g, 12, 10, gl); setpx(g, 14, 10, gl); setpx(g, 14, 11, gl); setpx(g, 14, 12, gl); setpx(g, 12, 11, gl); setpx(g, 12, 12, gl); setpx(g, 13, 12, gl)
      setpx(g, 10, 11, gl); setpx(g, 11, 11, gl)
      if (!blink) { setpx(g, 8, 11, 'o'); setpx(g, 13, 11, 'o') }
    }
    if (o.hat) {
      fillrect(g, 4, 2, 14, 2, o.hat)
      for (let x = 4; x < 18; x++) setpx(g, x, 4, o.hatBrim || o.hat)
      fillrect(g, 3, 4, 16, 1, o.hatBrim || o.hat)
      for (let x = 5; x < 17; x++) setpx(g, x, 2, o.hatHl || o.hat)
    }
    for (const y in HEAD) {
      const [a] = HEAD[+y]
      setpx(g, a - 1, +y, 'k')
    }
    // Keep as a 2D grid of cell strings (cells are full hex/key values, NOT single
    // chars), so multi-character colors survive. Joining rows would shred them.
    return g
  }
  // frame 0: neutral · frame 1: blink · frame 2: mouth open (talking).
  return { pal: SPAL, frames: [build(false), build(true), build(false, true)], px: 6 }
}

function shade(c: string): string {
  const m: Record<string, string> = {
    [SPAL.t]: '#1d3138', [SPAL.m]: '#141a20', [SPAL.x]: '#481818',
    [SPAL.w]: '#9a937e', [SPAL.n]: '#8a5a22', [SPAL.g]: '#2a363d',
  }
  return m[c] || '#0c0f14'
}

export function makeBody(o: PortraitOpts): Sprite {
  const sk = o.skin
  const skS = o.skinS
  const build = (dy: number): string[] => {
    const g = blank(24, 44)
    fillrect(g, 7, 33, 4, 11, o.legs || o.cloth)
    fillrect(g, 13, 33, 4, 11, o.legs || o.cloth)
    setpx(g, 7, 33, 'k'); setpx(g, 16, 33, 'k')
    fillrect(g, 6, 42, 5, 2, '#15181d'); fillrect(g, 13, 42, 5, 2, '#15181d')
    const ty = 14 + dy
    fillrect(g, 5, ty, 14, 20, o.cloth)
    for (let x = 5; x < 19; x++) setpx(g, x, ty, o.clothHl)
    for (let y = ty; y < ty + 20; y++) {
      setpx(g, 17, y, shade(o.cloth)); setpx(g, 18, y, shade(o.cloth))
    }
    setpx(g, 11, ty, o.accent); setpx(g, 12, ty, o.accent)
    fillrect(g, 11, ty, 2, 8, o.tie || o.accent)
    fillrect(g, 3, ty, 2, 16, shade(o.cloth)); fillrect(g, 19, ty, 2, 16, shade(o.cloth))
    fillrect(g, 3, ty + 16, 3, 2, sk); fillrect(g, 18, ty + 16, 3, 2, sk)
    fillrect(g, 10, ty - 2, 4, 3, sk); setpx(g, 13, ty - 1, skS)
    const hx = 7
    const hy = ty - 15
    fillrect(g, hx + 1, hy + 1, 9, 11, sk)
    for (let y = hy + 1; y < hy + 12; y++) setpx(g, hx + 9, y, skS)
    fillrect(g, hx, hy, 11, 3, o.hair)
    for (let x = hx + 1; x < hx + 10; x++) setpx(g, x, hy, o.hairHl)
    if (o.style === 'long') {
      fillrect(g, hx, hy + 2, 2, 9, o.hair); fillrect(g, hx + 9, hy + 2, 2, 9, o.hair)
    } else {
      setpx(g, hx, hy + 3, o.hair); setpx(g, hx + 10, hy + 3, o.hair)
    }
    if (o.hat) {
      fillrect(g, hx - 1, hy - 1, 13, 2, o.hat); fillrect(g, hx - 2, hy + 1, 15, 1, o.hatBrim || o.hat)
    }
    setpx(g, hx + 3, hy + 5, 'e'); setpx(g, hx + 7, hy + 5, 'e')
    if (o.glasses) {
      setpx(g, hx + 2, hy + 5, o.glasses); setpx(g, hx + 4, hy + 5, o.glasses); setpx(g, hx + 6, hy + 5, o.glasses); setpx(g, hx + 8, hy + 5, o.glasses)
    }
    setpx(g, hx + 5, hy + 7, skS)
    fillrect(g, hx + 4, hy + 9, 3, 1, o.lip || 'p')
    if (o.beard) {
      fillrect(g, hx + 2, hy + 9, 7, 3, o.beard); fillrect(g, hx + 4, hy + 9, 3, 1, o.lip || 'p')
    }
    // 2D grid of cell strings (cells are full hex/key values) - joining rows would shred them.
    return g
  }
  return { pal: SPAL, frames: [build(0), build(1)], px: 6 }
}

export const PORTRAITS: Record<string, Sprite> = {
  victim: makePortrait({ skin: SPAL['4'], skinS: SPAL['5'], hair: SPAL.h, hairHl: SPAL.H, style: 'bun', cloth: SPAL.m, clothHl: SPAL.M, accent: SPAL.n, lip: SPAL.p }),
  wexler: makePortrait({ skin: SPAL['1'], skinS: SPAL['2'], hair: SPAL.y, hairHl: SPAL.Y, style: 'slick', cloth: SPAL.m, clothHl: SPAL.M, accent: SPAL.i, tie: SPAL.x, beard: '#7d7c72', stubble: true }),
  iris: makePortrait({ skin: SPAL['4'], skinS: SPAL['5'], hair: SPAL.u, hairHl: SPAL.U, style: 'long', cloth: SPAL.w, clothHl: SPAL.W, accent: SPAL.t, lip: SPAL.p }),
  teo: makePortrait({ skin: SPAL['6'], skinS: SPAL['7'], hair: SPAL.h, hairHl: SPAL.H, style: 'short', cloth: SPAL.g, clothHl: SPAL.G, accent: SPAL.M, stubble: true }),
  frost: makePortrait({ skin: SPAL['1'], skinS: SPAL['2'], hair: SPAL.y, hairHl: SPAL.Y, style: 'wave', cloth: SPAL.t, clothHl: SPAL.T, accent: SPAL.i, glasses: SPAL.g, lip: SPAL.p }),
  detective: makePortrait({ skin: SPAL['6'], skinS: SPAL['7'], hair: SPAL.h, hairHl: SPAL.H, style: 'short', cloth: SPAL.m, clothHl: SPAL.M, accent: SPAL.n, hat: '#23292f', hatBrim: '#171c21', hatHl: '#2d353d', stubble: true }),
}

export const BODIES: Record<string, Sprite> = {
  wexler: makeBody({ skin: SPAL['1'], skinS: SPAL['2'], hair: SPAL.y, hairHl: SPAL.Y, style: 'slick', cloth: SPAL.m, clothHl: SPAL.M, accent: SPAL.i, tie: SPAL.x, beard: '#7d7c72' }),
  iris: makeBody({ skin: SPAL['4'], skinS: SPAL['5'], hair: SPAL.u, hairHl: SPAL.U, style: 'long', cloth: SPAL.w, clothHl: SPAL.W, accent: SPAL.t, lip: SPAL.p }),
  teo: makeBody({ skin: SPAL['6'], skinS: SPAL['7'], hair: SPAL.h, hairHl: SPAL.H, style: 'short', cloth: SPAL.g, clothHl: SPAL.G, accent: SPAL.M, legs: SPAL.m }),
  frost: makeBody({ skin: SPAL['1'], skinS: SPAL['2'], hair: SPAL.y, hairHl: SPAL.Y, style: 'wave', cloth: SPAL.t, clothHl: SPAL.T, accent: SPAL.i, glasses: SPAL.g, lip: SPAL.p }),
}

// Gender-matched fallback casts for generated suspects (named portraits are golden-only).
// A female suspect always draws a female portrait/body; a male suspect a male one.
const _M_PORTRAITS: Sprite[] = [
  PORTRAITS.wexler, PORTRAITS.teo,
  makePortrait({ skin: SPAL['6'], skinS: SPAL['7'], hair: SPAL.h, hairHl: SPAL.H, style: 'curly', cloth: SPAL.t, clothHl: SPAL.T, accent: SPAL.i }),
  makePortrait({ skin: SPAL['1'], skinS: SPAL['2'], hair: SPAL.r, hairHl: SPAL.R, style: 'bald', cloth: SPAL.g, clothHl: SPAL.G, accent: SPAL.M, beard: '#5a4030' }),
  makePortrait({ skin: SPAL['4'], skinS: SPAL['5'], hair: SPAL.y, hairHl: SPAL.Y, style: 'short', cloth: SPAL.m, clothHl: SPAL.M, accent: SPAL.n, stubble: true }),
]
const _F_PORTRAITS: Sprite[] = [
  PORTRAITS.iris, PORTRAITS.frost,
  makePortrait({ skin: SPAL['6'], skinS: SPAL['7'], hair: SPAL.h, hairHl: SPAL.H, style: 'bun', cloth: SPAL.x, clothHl: SPAL.X, accent: SPAL.i, lip: SPAL.p }),
  makePortrait({ skin: SPAL['1'], skinS: SPAL['2'], hair: SPAL.r, hairHl: SPAL.R, style: 'curly', cloth: SPAL.t, clothHl: SPAL.T, accent: SPAL.n, lip: SPAL.p }),
  makePortrait({ skin: SPAL['4'], skinS: SPAL['5'], hair: SPAL.u, hairHl: SPAL.U, style: 'wave', cloth: SPAL.w, clothHl: SPAL.W, accent: SPAL.t, lip: SPAL.p }),
]
const _M_BODIES: Sprite[] = [
  BODIES.wexler, BODIES.teo,
  makeBody({ skin: SPAL['6'], skinS: SPAL['7'], hair: SPAL.h, hairHl: SPAL.H, style: 'short', cloth: SPAL.t, clothHl: SPAL.T, accent: SPAL.i, legs: SPAL.m }),
  makeBody({ skin: SPAL['1'], skinS: SPAL['2'], hair: SPAL.r, hairHl: SPAL.R, style: 'short', cloth: SPAL.g, clothHl: SPAL.G, accent: SPAL.M, legs: SPAL.m, beard: '#5a4030' }),
]
const _F_BODIES: Sprite[] = [
  BODIES.iris, BODIES.frost,
  makeBody({ skin: SPAL['6'], skinS: SPAL['7'], hair: SPAL.h, hairHl: SPAL.H, style: 'long', cloth: SPAL.x, clothHl: SPAL.X, accent: SPAL.i, lip: SPAL.p }),
  makeBody({ skin: SPAL['4'], skinS: SPAL['5'], hair: SPAL.u, hairHl: SPAL.U, style: 'long', cloth: SPAL.t, clothHl: SPAL.T, accent: SPAL.n, lip: SPAL.p }),
]
function _hash(s: string): number {
  let h = 0
  for (let i = 0; i < s.length; i++) h = (h * 31 + s.charCodeAt(i)) >>> 0
  return h
}
function _isFemale(gender?: string): boolean {
  return (gender || '').toLowerCase().startsWith('f')
}
export function portraitFor(id: string, gender?: string): Sprite {
  if (PORTRAITS[id]) return PORTRAITS[id]
  const pool = _isFemale(gender) ? _F_PORTRAITS : _M_PORTRAITS
  return pool[_hash(id) % pool.length]
}
export function bodyFor(id: string, gender?: string): Sprite {
  if (BODIES[id]) return BODIES[id]
  const pool = _isFemale(gender) ? _F_BODIES : _M_BODIES
  return pool[_hash(id) % pool.length]
}

export const IPAL: Record<string, string> = {
  k: '#080c11', d: '#1c222a', g: '#37636b', G: '#5d8a8a', a: '#e0a44c', A: '#f5d08a',
  x: '#87292a', w: '#d4cdb7', W: '#f5f1e6', s: '#2d4a52', b: '#3a6b6b', e: '#0e1119', m: '#9d977f',
}
export const EV_ICONS: Record<string, string[]> = {
  phone: ['..kkkkkkkk..', '..kddddddk..', '..kdwwwwdk..', '..kdwGGwdk..', '..kdwWWwdk..', '..kdwwwwdk..', '..kdaaaadk..', '..kdwwwwdk..', '..kdGGGGdk..', '..kdwwwwdk..', '..kdwwwwdk..', '..kddddddk..', '..kdd  ddk..', '..kdaaaadk..', '..kddddddk..', '..kkkkkkkk..'],
  receipt: ['...wwwwwww..', '..wWWWWWWw..', '..wkkkkkkw..', '..wWWWWWWw..', '..wkkk.kkw..', '..wWWWWWWw..', '..wkk.kkkw..', '..wWWWWWWw..', '..wkkkk..w..', '..wWWWWWWw..', '..wxxxxxxw..', '..wWWWWWWw..', '..wkk.kkkw..', '..wWWWWWWw..', '..wwvwvwvw..', '...wvwvwv...'],
  cctv: ['.kkkkkk.....', '.kddddkk....', '.kdGGGdkk...', '.kdGAAGdkkk.', '.kdGAAGddek.', '.kdGGGdkek..', '.kdddddkk...', '..kkkkk.....', '....kk......', '...kddk.....', '..kddddk....', '..kdsssdk...', '..kdsbsdk...', '..kddddk....', '...kkkk.....', '............'],
  voicemail: ['..kkkkkkkk..', '.kddddddddk.', '.kdwwwwwwdk.', '.kdwGbGbwdk.', '.kdwbGbGwdk.', '.kdwGbGbwdk.', '.kdwwwwwwdk.', '.kdaWaWaWdk.', '.kd.a.a.adk.', '.kdaWaWaWdk.', '.kdwwwwwwdk.', '.kddddddddk.', '..kkkkkkkk..', '...k....k...', '..kk....kk..', '............'],
  keycard: ['............', '.kkkkkkkkkk.', '.kssssssssk.', '.ksbbbbbbsk.', '.ksbaaaabsk.', '.ksbaWWabsk.', '.ksbaaaabsk.', '.ksbbbbbbsk.', '.ksssssssk..', '.kswwwwsssk.', '.kswwwwsssk.', '.kssssssssk.', '.kkkkkkkkkk.', '......kk....', '.....kgggk..', '............'],
  photoEv: ['.wwwwwwwwww.', '.wkkkkkkkkw.', '.wkdddddd kw', '.wkdaa..d.kw', '.wkd.aa..dkw', '.wkd..aa.dkw', '.wkd...aadkw', '.wkdGG..adkw', '.wkdddddddkw', '.wkdGGGGGdkw', '.wkddddddd kw', '.wkkkkkkkkw.', '.wwwwwwwwww.', '...ka.ak....', '..k.aa.k....', '............'],
  compass: ['......a.....', '.....aAa....', '....a.a.a...', '...a..a..a..', '..a...a...a.', '.a....a....a', 'a....aAa... a', '.aaaaaAaaaaa', 'a....aAa....a', '.a...a.a...a.', '..a..a.a..a..', '...a.a.a.a...', '....aa.aa....', '.....aAa.....', '......a......', '............'],
}

// ---- scene painters ----
const C = {
  sky0: '#0c1622', sky1: '#13202b', sky2: '#1b2d38', water: '#0e1a22',
  bldg: '#0a1118', bldgL: '#13202b', win: '#e0a44c', winDim: '#7a5a2a',
  amber: '#e0a44c', amberD: '#b9772f', bone: '#e0d9c4', ox: '#87292a',
  slate: '#2d4a52', slateL: '#3a6b6b', shadow: '#070b0f', lamp: '#f5d08a',
}
function lampCone(ctx: CanvasRenderingContext2D, cx: number, cy: number, w: number, h: number): void {
  // A soft pool of lamplight directly under the bulb - dense near the source, fading out
  // quickly - NOT a hard full-height pyramid. Narrower + shorter + quadratic falloff.
  const reach = Math.max(8, Math.floor(h * 0.5))
  for (let y = 0; y < reach; y++) {
    const f = y / reach
    const ww = Math.floor(w * 0.45 * f)
    const t = 0.3 * (1 - f) * (1 - f)
    for (let x = -ww; x < ww; x++) {
      const thr = (BAYER4[(cy + y) & 3][(cx + x) & 3] + 0.5) / 16
      if (thr < t) {
        ctx.fillStyle = C.amber
        ctx.globalAlpha = 0.32
        ctx.fillRect(cx + x, cy + y, 1, 1)
      }
    }
  }
  ctx.globalAlpha = 1
}
function rainStreaks(ctx: CanvasRenderingContext2D, w: number, h: number, t: number): void {
  ctx.fillStyle = 'rgba(170,190,200,0.22)'
  for (let i = 0; i < 40; i++) {
    const x = (i * 37 + t * 4) % w
    const y = (i * 53 + t * 7) % h
    ctx.fillRect(Math.floor(x), Math.floor(y), 1, 3)
  }
}

const paintSkyline: ScenePainter = (ctx, w, h) => {
  const horizon = Math.floor(h * 0.5)
  ditherGrad(ctx, 0, 0, w, horizon, C.sky2, C.sky1)
  for (let y = horizon - 22; y < horizon; y++) {
    const tt = (y - (horizon - 22)) / 22
    for (let x = 0; x < w; x++) {
      const thr = (BAYER4[y & 3][x & 3] + 0.5) / 16
      if (thr < tt * 0.5) { ctx.fillStyle = C.amberD; ctx.fillRect(x, y, 1, 1) }
    }
  }
  ditherGrad(ctx, 0, horizon, w, h - horizon, '#0c1620', '#0a121a')
  const dist = [[0.0, 0.16, 0.09], [0.08, 0.28, 0.07], [0.14, 0.18, 0.1], [0.23, 0.34, 0.08], [0.31, 0.22, 0.1], [0.4, 0.4, 0.09], [0.49, 0.2, 0.11], [0.58, 0.3, 0.09], [0.66, 0.24, 0.1], [0.75, 0.38, 0.08], [0.83, 0.2, 0.1], [0.91, 0.28, 0.1]]
  for (const [bx, bh, bw] of dist) {
    const x = Math.floor(bx * w)
    const bht = Math.floor(bh * h * 0.44)
    const wd = Math.ceil(bw * w)
    ctx.fillStyle = '#0a121a'; ctx.fillRect(x, horizon - bht, wd, bht)
    ctx.fillStyle = C.bldgL; ctx.fillRect(x, horizon - bht, 1, bht)
    for (let wy = horizon - bht + 3; wy < horizon - 2; wy += 5)
      for (let wx = x + 2; wx < x + wd - 2; wx += 4) { ctx.fillStyle = (wx + wy) % 3 ? C.winDim : C.win; ctx.fillRect(wx, wy, 2, 2) }
  }
  const fg = [[0.0, 0.4, 0.16], [0.15, 0.3, 0.13], [0.27, 0.52, 0.15], [0.41, 0.34, 0.12], [0.52, 0.46, 0.16], [0.67, 0.3, 0.14], [0.8, 0.5, 0.2]]
  for (const [bx, bh, bw] of fg) {
    const x = Math.floor(bx * w)
    const wd = Math.ceil(bw * w)
    const topY = Math.floor(h * (0.5 + (1 - bh) * 0.22))
    ctx.fillStyle = '#070d13'; ctx.fillRect(x, topY, wd, h - topY)
    ctx.fillStyle = '#0e1a24'; ctx.fillRect(x, topY, wd, 2)
    ctx.fillStyle = '#10202b'; ctx.fillRect(x, topY, 1, h - topY)
    for (let wy = topY + 5; wy < h - 3; wy += 8)
      for (let wx = x + 3; wx < x + wd - 4; wx += 8) { const lit = (wx * 3 + wy) % 5; ctx.fillStyle = lit === 0 ? C.amber : lit === 1 ? C.win : '#0c151d'; ctx.fillRect(wx, wy, 3, 4) }
  }
}

const paintDesk: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  ctx.fillStyle = C.sky2; ctx.fillRect(w - 70, 8, 60, h - 40)
  for (let y = 10; y < h - 34; y += 4) { ctx.fillStyle = C.shadow; ctx.fillRect(w - 70, y, 60, 2) }
  ctx.fillStyle = C.winDim; for (let i = 0; i < 10; i++) ctx.fillRect(w - 66 + i * 6, h - 40, 2, 2)
  ctx.fillStyle = '#241a12'; ctx.fillRect(0, h - 26, w, 26)
  ctx.fillStyle = '#3a2a1a'; ctx.fillRect(0, h - 26, w, 2)
  const lx = 42
  const ly = h - 26
  ctx.fillStyle = C.shadow; ctx.fillRect(lx - 2, ly - 22, 4, 22)
  ctx.fillStyle = C.amberD; ctx.fillRect(lx - 9, ly - 30, 18, 9)
  ctx.fillStyle = C.amber; ctx.fillRect(lx - 9, ly - 30, 18, 2)
  ctx.fillStyle = C.lamp; ctx.fillRect(lx - 7, ly - 22, 14, 3)
  lampCone(ctx, lx, ly - 21, 30, 40)
  ctx.fillStyle = C.bone; ctx.fillRect(lx - 14, h - 16, 40, 12)
  ctx.fillStyle = C.amberD; ctx.fillRect(lx - 14, h - 16, 40, 2)
  ctx.fillStyle = C.ox; ctx.fillRect(lx - 10, h - 12, 14, 2)
  ctx.fillStyle = C.slate; ctx.fillRect(w - 50, h - 16, 10, 11); ctx.fillRect(w - 40, h - 13, 3, 4)
}

const paintAtrium: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky2, C.sky0)
  for (let cx = 10; cx < w; cx += 34) { ctx.fillStyle = C.bldg; ctx.fillRect(cx, 10, 8, h - 40); ctx.fillStyle = C.bldgL; ctx.fillRect(cx, 10, 2, h - 40) }
  for (let cx = 22; cx < w; cx += 34) { ditherGrad(ctx, cx, 14, 16, h - 50, C.slate, C.sky1); for (let y = 18; y < h - 40; y += 6) { ctx.fillStyle = C.shadow; ctx.fillRect(cx, y, 16, 1) } }
  const my = Math.floor(h * 0.34)
  ctx.fillStyle = C.bldgL; ctx.fillRect(0, my, w, 4)
  for (let x = 4; x < w; x += 6) { ctx.fillStyle = C.slate; ctx.fillRect(x, my + 4, 1, 8) }
  ctx.fillStyle = C.shadow; ctx.fillRect(0, my + 12, w, 2)
  ctx.fillStyle = '#0c151b'; ctx.fillRect(0, h - 22, w, 22)
  for (let x = 0; x < w; x += 10) { ctx.fillStyle = C.sky1; ctx.fillRect(x, h - 22, 1, 22) }
  const lx = Math.floor(w / 2)
  ctx.fillStyle = C.shadow; ctx.fillRect(lx, 0, 1, 14)
  ctx.fillStyle = C.amberD; ctx.fillRect(lx - 5, 14, 11, 4)
  ctx.fillStyle = C.lamp; ctx.fillRect(lx - 4, 18, 9, 2)
  lampCone(ctx, lx, 19, 46, h - 30)
  ctx.fillStyle = C.bone
  const bx = lx + 10
  const by = h - 12
  ctx.fillRect(bx, by, 2, 1); ctx.fillRect(bx + 2, by - 1, 1, 1); ctx.fillRect(bx + 5, by - 2, 1, 1); ctx.fillRect(bx + 8, by, 2, 1); ctx.fillRect(bx - 2, by + 2, 1, 1); ctx.fillRect(bx + 11, by + 2, 1, 1); ctx.fillRect(bx + 3, by + 4, 5, 1)
  ctx.fillStyle = C.amber; ctx.fillRect(bx + 14, by, 2, 3)
  rainStreaks(ctx, w, h * 0.5, t)
}

const paintInterro: ScenePainter = (ctx, w, h) => {
  // Crisp, full-height interrogation room - flat paneled walls (not a smooth gradient),
  // a one-way mirror, a hanging lamp, and a table along the bottom. Designed to fill the
  // whole stage so there is no hard crop seam.
  ctx.fillStyle = C.sky1; ctx.fillRect(0, 0, w, h)
  ctx.fillStyle = C.sky0; ctx.fillRect(0, 0, w, Math.floor(h * 0.3)) // darker upper wall
  ctx.fillStyle = '#0a121a'
  const step = Math.max(8, Math.floor(w / 6))
  for (let x = step; x < w; x += step) ctx.fillRect(x, 0, 2, Math.floor(h * 0.74)) // panel seams
  ctx.fillStyle = C.sky2; ctx.fillRect(0, Math.floor(h * 0.5), w, 3) // wainscot
  ctx.fillStyle = C.shadow; ctx.fillRect(0, Math.floor(h * 0.5) + 3, w, 2)
  // one-way mirror (upper right)
  const mw = Math.floor(w * 0.24)
  const mh = Math.floor(h * 0.15)
  const mx = w - mw - Math.floor(w * 0.06)
  const my = Math.floor(h * 0.12)
  ctx.fillStyle = C.shadow; ctx.fillRect(mx - 2, my - 2, mw + 4, mh + 4)
  ditherGrad(ctx, mx, my, mw, mh, C.slateL, C.sky1)
  // floor
  const fy = Math.floor(h * 0.78)
  ctx.fillStyle = '#0a1015'; ctx.fillRect(0, fy, w, h - fy)
  ctx.fillStyle = C.sky2; ctx.fillRect(0, fy, w, 2)
  // hanging lamp + soft glow
  const lx = Math.floor(w * 0.5)
  ctx.fillStyle = C.shadow; ctx.fillRect(lx, 0, 1, Math.floor(h * 0.05))
  ctx.fillStyle = C.amberD; ctx.fillRect(lx - 7, Math.floor(h * 0.05), 15, 5)
  ctx.fillStyle = C.lamp; ctx.fillRect(lx - 5, Math.floor(h * 0.05) + 5, 11, 2)
  lampCone(ctx, lx, Math.floor(h * 0.05) + 6, Math.floor(w * 0.55), Math.floor(h * 0.55))
  // interrogation table along the bottom
  const ty = Math.floor(h * 0.85)
  ctx.fillStyle = '#1a2228'; ctx.fillRect(0, ty, w, h - ty)
  ctx.fillStyle = C.slate; ctx.fillRect(0, ty, w, 3)
}

const paintSeawall: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, Math.floor(h * 0.6), C.sky2, C.sky0)
  ctx.fillStyle = C.bldg; for (let x = 0; x < w; x += 18) { const bh = 8 + ((x * 7) % 18); ctx.fillRect(x, Math.floor(h * 0.5) - bh, 16, bh) }
  ditherGrad(ctx, 0, Math.floor(h * 0.5), w, Math.floor(h * 0.5), C.water, C.sky0)
  ctx.fillStyle = '#0c151b'; ctx.fillRect(0, h - 20, w, 20)
  ctx.fillStyle = C.slate; ctx.fillRect(0, h - 22, w, 2)
  for (let x = 6; x < w; x += 14) { ctx.fillStyle = C.slate; ctx.fillRect(x, h - 30, 2, 10) }
  ctx.fillStyle = C.slate; ctx.fillRect(0, h - 30, w, 2)
  const fx = Math.floor(w * 0.62)
  ctx.fillStyle = C.bone; ctx.fillRect(fx, h - 40, 6, 14); ctx.fillStyle = '#9a937e'; ctx.fillRect(fx + 4, h - 40, 2, 14)
  ctx.fillStyle = C.sky1; ctx.fillRect(fx + 1, h - 44, 4, 4)
  rainStreaks(ctx, w, h, t)
}

const paintMezzanine: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  ctx.fillStyle = C.bldgL; ctx.fillRect(0, Math.floor(h * 0.5), w, 4)
  for (let x = 4; x < w; x += 8) { ctx.fillStyle = C.slate; ctx.fillRect(x, Math.floor(h * 0.5) + 4, 2, 14) }
  ditherGrad(ctx, 0, Math.floor(h * 0.5) + 18, w, Math.floor(h * 0.5), C.shadow, '#020406')
  lampCone(ctx, w - 14, 4, 40, h - 10)
  const fx = Math.floor(w * 0.4)
  ctx.fillStyle = C.bone; ctx.fillRect(fx, Math.floor(h * 0.5) - 18, 7, 18)
  ctx.fillStyle = '#9a937e'; ctx.fillRect(fx + 5, Math.floor(h * 0.5) - 18, 2, 18)
  ctx.fillStyle = C.sky2; ctx.fillRect(fx + 1, Math.floor(h * 0.5) - 23, 5, 5)
  ctx.fillStyle = C.ox; ctx.fillRect(fx + 7, Math.floor(h * 0.5) - 6, 2, 2)
  rainStreaks(ctx, w, h * 0.5, t)
}

const paintMap: ScenePainter = (ctx, w, h, t) => {
  ctx.fillStyle = C.sky0; ctx.fillRect(0, 0, w, h)
  ctx.fillStyle = C.slate
  for (let x = 0; x < w; x += 12) ctx.fillRect(x, 0, 1, h)
  for (let y = 0; y < h; y += 12) ctx.fillRect(0, y, w, 1)
  ctx.fillStyle = C.water; for (let i = 0; i < w + h; i++) ctx.fillRect(i, Math.floor(h * 0.6) - Math.floor(i * 0.4), 3, 3)
  const n = Math.min(Math.floor(t / 2), 60)
  for (let i = 0; i < n; i++) { const x = (i * 53) % w; const y = (i * 31) % h; ctx.fillStyle = i % 4 ? C.winDim : C.amber; ctx.fillRect(x, y, 3, 3) }
  const px = Math.floor(w * 0.56)
  const py = Math.floor(h * 0.42)
  ctx.fillStyle = C.ox; ctx.fillRect(px - 2, py - 6, 5, 6); ctx.fillRect(px - 1, py, 3, 4)
  ctx.fillStyle = C.bone; ctx.fillRect(px, py - 4, 1, 1)
}

// ---- room interiors: recognizable furniture so a generated location reads as itself ----
const _WOOD = '#3a2c1c'
const _WOOD_L = '#55402a'
const _METAL = '#2d3640'
const _BOOK = ['#6b3a2e', '#3a5a52', '#5a4a2a', '#46506b', '#5e1c1c', '#37636b']

const paintKitchen: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky2, C.sky0)
  const cy = Math.floor(h * 0.16)
  for (let x = 6; x < w - 6; x += 26) {
    ctx.fillStyle = _WOOD; ctx.fillRect(x, cy, 22, 20)
    ctx.fillStyle = _WOOD_L; ctx.fillRect(x, cy, 22, 2)
    ctx.fillStyle = C.amber; ctx.fillRect(x + 18, cy + 9, 2, 3)
  }
  ctx.fillStyle = C.slate; ctx.fillRect(w - 52, cy + 26, 40, 26)
  ditherGrad(ctx, w - 50, cy + 28, 36, 22, C.slateL, C.sky1)
  ctx.fillStyle = C.shadow; ctx.fillRect(w - 33, cy + 26, 2, 26)
  const ly = Math.floor(h * 0.62)
  ctx.fillStyle = '#cfc8b2'; ctx.fillRect(0, ly, w, 5)
  ctx.fillStyle = _WOOD; ctx.fillRect(0, ly + 5, w, h - ly - 5)
  for (let x = 4; x < w; x += 24) { ctx.fillStyle = C.shadow; ctx.fillRect(x, ly + 5, 1, h - ly - 5); ctx.fillStyle = C.amber; ctx.fillRect(x + 18, ly + 12, 2, 3) }
  ctx.fillStyle = _METAL; ctx.fillRect(Math.floor(w * 0.2), ly - 8, 10, 8); ctx.fillRect(Math.floor(w * 0.2) + 10, ly - 5, 3, 3)
  const lx = Math.floor(w * 0.5)
  ctx.fillStyle = C.shadow; ctx.fillRect(lx, 0, 1, 12)
  ctx.fillStyle = C.amberD; ctx.fillRect(lx - 6, 12, 13, 4)
  ctx.fillStyle = C.lamp; ctx.fillRect(lx - 4, 16, 9, 2)
  lampCone(ctx, lx, 18, 44, ly - 14)
  ctx.fillStyle = C.ox; ctx.fillRect(Math.floor(w * 0.62), ly - 3, 3, 3)
  rainStreaks(ctx, w, h * 0.4, t)
}

const paintStudy: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky2, C.sky0)
  const shelf = (sx: number, sw: number) => {
    ctx.fillStyle = _WOOD; ctx.fillRect(sx, 12, sw, h - 40)
    for (let sy = 18; sy < h - 34; sy += 16) {
      ctx.fillStyle = '#241a10'; ctx.fillRect(sx + 2, sy + 12, sw - 4, 3)
      for (let bx = sx + 3; bx < sx + sw - 3; bx += 3) { ctx.fillStyle = _BOOK[(bx + sy) % _BOOK.length]; ctx.fillRect(bx, sy, 2, 12) }
    }
  }
  shelf(8, Math.floor(w * 0.34))
  shelf(Math.floor(w * 0.58), Math.floor(w * 0.34))
  const dy = h - 24
  ctx.fillStyle = '#241a12'; ctx.fillRect(0, dy, w, 24)
  ctx.fillStyle = '#3a2a1a'; ctx.fillRect(0, dy, w, 2)
  const lx = Math.floor(w * 0.5)
  ctx.fillStyle = C.amberD; ctx.fillRect(lx - 6, dy - 12, 12, 5)
  ctx.fillStyle = C.lamp; ctx.fillRect(lx - 4, dy - 7, 9, 2)
  lampCone(ctx, lx, dy - 6, 36, 30)
  ctx.fillStyle = C.bone; ctx.fillRect(lx - 14, dy - 4, 20, 4)
  ctx.fillStyle = C.ox; ctx.fillRect(lx + 12, dy - 3, 3, 3)
}

const paintParlor: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky2, C.sky0)
  ctx.fillStyle = C.bldgL; ctx.fillRect(0, Math.floor(h * 0.55), w, 2)
  const fx = 12
  const fy = Math.floor(h * 0.32)
  ctx.fillStyle = '#1a1410'; ctx.fillRect(fx, fy, 40, h - fy - 22)
  ctx.fillStyle = _WOOD; ctx.fillRect(fx - 3, fy - 4, 46, 5)
  ctx.fillStyle = '#0a0805'; ctx.fillRect(fx + 8, fy + 10, 24, h - fy - 40)
  for (let i = 0; i < 30; i++) { const ex = fx + 10 + ((i * 7) % 20); const ey = h - 36 - ((i * 5) % 16); ctx.fillStyle = i % 3 ? C.amberD : C.amber; ctx.fillRect(ex, ey, 2, 2) }
  ctx.fillStyle = _WOOD_L; ctx.fillRect(w - 46, fy, 30, 22); ctx.fillStyle = C.slate; ctx.fillRect(w - 43, fy + 3, 24, 16)
  const sy = h - 30
  const sofX = Math.floor(w * 0.34)
  const sofW = Math.floor(w * 0.4)
  ctx.fillStyle = C.slate; ctx.fillRect(sofX, sy, sofW, 18)
  ctx.fillStyle = C.slateL; ctx.fillRect(sofX, sy, sofW, 4)
  ctx.fillStyle = C.slate; ctx.fillRect(sofX - 4, sy - 6, 6, 24); ctx.fillRect(sofX + sofW, sy - 6, 6, 24)
  ctx.fillStyle = '#0c151b'; ctx.fillRect(0, h - 12, w, 12)
  ctx.fillStyle = C.ox; ctx.fillRect(Math.floor(w * 0.52), h - 8, 3, 3)
  lampCone(ctx, Math.floor(w * 0.5), 8, 50, h - 16)
  rainStreaks(ctx, w, h * 0.4, t)
}

const paintBedroom: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  ctx.fillStyle = C.slate; ctx.fillRect(w - 56, 14, 42, 34); ditherGrad(ctx, w - 54, 16, 38, 30, C.slateL, C.sky1)
  ctx.fillStyle = C.shadow; ctx.fillRect(w - 35, 14, 2, 34); ctx.fillRect(w - 56, 30, 42, 2)
  const bx = Math.floor(w * 0.22)
  const by = h - 34
  const bw = Math.floor(w * 0.5)
  ctx.fillStyle = _WOOD; ctx.fillRect(bx - 4, by - 12, 6, 28)
  ctx.fillStyle = C.bone; ctx.fillRect(bx, by, bw, 6)
  ctx.fillStyle = C.slate; ctx.fillRect(bx, by + 6, bw, 14)
  ctx.fillStyle = C.slateL; ctx.fillRect(bx, by + 6, bw, 3)
  ctx.fillStyle = C.bone; ctx.fillRect(bx + 3, by + 2, 12, 5)
  const nx = bx + bw + 6
  ctx.fillStyle = _WOOD; ctx.fillRect(nx, by + 4, 14, 16)
  ctx.fillStyle = C.amberD; ctx.fillRect(nx + 3, by - 2, 8, 6); ctx.fillStyle = C.lamp; ctx.fillRect(nx + 4, by + 3, 6, 1)
  lampCone(ctx, nx + 7, by, 28, 24)
  ctx.fillStyle = '#0c151b'; ctx.fillRect(0, h - 10, w, 10)
}

const paintAlley: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  // facing walls funneling to a lit back street
  ctx.fillStyle = '#0a121a'; ctx.fillRect(0, 0, Math.floor(w * 0.3), h)
  ctx.fillStyle = '#0c141c'; ctx.fillRect(Math.floor(w * 0.7), 0, Math.ceil(w * 0.3), h)
  for (let y = 8; y < h - 30; y += 14) {
    ctx.fillStyle = C.bldgL; ctx.fillRect(8, y, 14, 8); ctx.fillRect(w - 24, y + 5, 14, 8)
    ctx.fillStyle = (y % 28) ? C.winDim : C.win; ctx.fillRect(11, y + 2, 3, 3); ctx.fillRect(w - 21, y + 7, 3, 3)
  }
  // fire escape zig-zag on the left wall
  ctx.fillStyle = _METAL
  for (let i = 0; i < 4; i++) { const y = 16 + i * 22; ctx.fillRect(26, y, 26, 2); ctx.fillRect(i % 2 ? 26 : 50, y - 12, 2, 14) }
  // wet cobbled lane
  ctx.fillStyle = '#0c151b'; ctx.fillRect(0, h - 26, w, 26)
  for (let x = 2; x < w; x += 9) { ctx.fillStyle = (x % 18) ? '#101a22' : C.slate; ctx.fillRect(x, h - 24 + (x % 3), 5, 2) }
  // dumpster + crates
  ctx.fillStyle = C.slate; ctx.fillRect(Math.floor(w * 0.32), h - 42, 34, 18)
  ctx.fillStyle = C.slateL; ctx.fillRect(Math.floor(w * 0.32), h - 42, 34, 3)
  ctx.fillStyle = _WOOD; ctx.fillRect(Math.floor(w * 0.32) + 40, h - 34, 12, 10); ctx.fillStyle = _WOOD_L; ctx.fillRect(Math.floor(w * 0.32) + 40, h - 34, 12, 2)
  // buzzing sign at the alley mouth
  const sx = Math.floor(w * 0.62)
  ctx.fillStyle = C.shadow; ctx.fillRect(sx, 18, 3, 16)
  ctx.fillStyle = C.ox; ctx.fillRect(sx - 12, 20, 12, 12)
  ctx.fillStyle = '#b8443f'; ctx.fillRect(sx - 10, 22, 8, 8)
  lampCone(ctx, sx - 6, 32, 30, h - 60)
  rainStreaks(ctx, w, h, t)
}

const paintBar: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  // back shelf with bottles
  ctx.fillStyle = _WOOD; ctx.fillRect(10, 12, w - 20, 34)
  ctx.fillStyle = '#241a10'; ctx.fillRect(10, 28, w - 20, 3); ctx.fillRect(10, 43, w - 20, 3)
  for (let x = 16; x < w - 18; x += 7) {
    ctx.fillStyle = _BOOK[(x >> 2) % _BOOK.length]; ctx.fillRect(x, 18, 4, 10); ctx.fillRect(x + 1, 15, 2, 3)
    if ((x >> 3) % 2) { ctx.fillStyle = _BOOK[(x >> 1) % _BOOK.length]; ctx.fillRect(x, 33, 4, 10); ctx.fillRect(x + 1, 31, 2, 2) }
  }
  // mirror strip behind the top row
  ctx.fillStyle = C.slateL; ctx.fillRect(12, 13, w - 24, 2)
  // counter
  const cy = Math.floor(h * 0.62)
  ctx.fillStyle = _WOOD_L; ctx.fillRect(0, cy, w, 5)
  ctx.fillStyle = _WOOD; ctx.fillRect(0, cy + 5, w, h - cy - 5)
  for (let x = 6; x < w; x += 22) { ctx.fillStyle = C.shadow; ctx.fillRect(x, cy + 5, 1, h - cy - 5) }
  // stools
  for (let i = 0; i < 4; i++) {
    const x = 24 + i * Math.floor(w * 0.22)
    ctx.fillStyle = C.ox; ctx.fillRect(x, h - 22, 14, 4)
    ctx.fillStyle = _METAL; ctx.fillRect(x + 6, h - 18, 2, 18)
  }
  // glass + bottle left on the counter
  ctx.fillStyle = C.bone; ctx.fillRect(Math.floor(w * 0.3), cy - 6, 4, 6)
  ctx.fillStyle = C.amberD; ctx.fillRect(Math.floor(w * 0.3) + 10, cy - 10, 4, 10); ctx.fillStyle = C.amber; ctx.fillRect(Math.floor(w * 0.3) + 11, cy - 12, 2, 2)
  // low pendant lamps
  for (const fx of [0.25, 0.65]) {
    const lx = Math.floor(w * fx)
    ctx.fillStyle = C.shadow; ctx.fillRect(lx, 0, 1, 8)
    ctx.fillStyle = C.amberD; ctx.fillRect(lx - 5, 8, 11, 4); ctx.fillStyle = C.lamp; ctx.fillRect(lx - 3, 12, 7, 2)
    lampCone(ctx, lx, 13, 34, cy - 16)
  }
}

const paintCasino: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, '#131a14', '#0a0f0a')
  // wall pattern + framed rules board
  for (let x = 0; x < w; x += 16) { ctx.fillStyle = '#0d1410'; ctx.fillRect(x, 0, 2, Math.floor(h * 0.5)) }
  ctx.fillStyle = _WOOD; ctx.fillRect(w - 58, 10, 40, 24); ctx.fillStyle = C.bone; ctx.fillRect(w - 54, 13, 32, 18)
  ctx.fillStyle = C.shadow; for (let i = 0; i < 4; i++) ctx.fillRect(w - 50, 16 + i * 4, 24, 1)
  // felt table, elliptical feel via stacked rects
  const ty = Math.floor(h * 0.55)
  ctx.fillStyle = '#14401f'; ctx.fillRect(Math.floor(w * 0.1), ty, Math.floor(w * 0.8), 26)
  ctx.fillStyle = '#1d5a2c'; ctx.fillRect(Math.floor(w * 0.13), ty, Math.floor(w * 0.74), 4)
  ctx.fillStyle = _WOOD; ctx.fillRect(Math.floor(w * 0.08), ty + 26, Math.floor(w * 0.84), 5)
  // cards + chip stacks
  ctx.fillStyle = C.bone; ctx.fillRect(Math.floor(w * 0.3), ty + 8, 7, 9); ctx.fillRect(Math.floor(w * 0.34), ty + 6, 7, 9)
  ctx.fillStyle = C.ox; ctx.fillRect(Math.floor(w * 0.36), ty + 8, 2, 2)
  for (let i = 0; i < 3; i++) {
    const x = Math.floor(w * 0.55) + i * 9
    ctx.fillStyle = [C.ox, C.bone, C.amber][i]; ctx.fillRect(x, ty + 10 - (i % 2) * 2, 6, 6 + (i % 2) * 2)
    ctx.fillStyle = C.shadow; ctx.fillRect(x, ty + 14, 6, 1)
  }
  // dice
  ctx.fillStyle = C.bone; ctx.fillRect(Math.floor(w * 0.46), ty + 12, 4, 4); ctx.fillStyle = C.shadow; ctx.fillRect(Math.floor(w * 0.47), ty + 13, 1, 1)
  // green-shaded pendant
  const lx = Math.floor(w * 0.5)
  ctx.fillStyle = C.shadow; ctx.fillRect(lx, 0, 1, 10)
  ctx.fillStyle = '#1d5a2c'; ctx.fillRect(lx - 8, 10, 17, 5); ctx.fillStyle = C.lamp; ctx.fillRect(lx - 5, 15, 11, 2)
  lampCone(ctx, lx, 16, 50, ty - 16)
  ctx.fillStyle = '#0a0f0a'; ctx.fillRect(0, h - 10, w, 10)
}

const paintTheater: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, '#1a0e10', '#0c0608')
  // stage floor + proscenium
  const sy = Math.floor(h * 0.58)
  ctx.fillStyle = _WOOD; ctx.fillRect(0, sy, w, 8)
  ctx.fillStyle = _WOOD_L; ctx.fillRect(0, sy, w, 2)
  // heavy curtains left/right with fold lines
  for (const [x0, dir] of [[0, 1], [w - Math.floor(w * 0.18), -1]] as [number, number][]) {
    const cw = Math.floor(w * 0.18)
    ctx.fillStyle = '#5e1c1c'; ctx.fillRect(x0, 0, cw, sy)
    for (let x = x0 + 2; x < x0 + cw; x += 5) { ctx.fillStyle = '#481414'; ctx.fillRect(x, 0, 2, sy) }
    ctx.fillStyle = '#87292a'; ctx.fillRect(dir > 0 ? x0 : x0 + cw - 3, 0, 3, sy)
  }
  // curtain valance
  ctx.fillStyle = '#5e1c1c'; ctx.fillRect(0, 0, w, 14)
  for (let x = 3; x < w; x += 9) { ctx.fillStyle = '#481414'; ctx.fillRect(x, 10, 5, 6) }
  ctx.fillStyle = C.amberD; ctx.fillRect(0, 14, w, 2)
  // backdrop + lone prop chair
  ditherGrad(ctx, Math.floor(w * 0.2), 18, Math.floor(w * 0.6), sy - 20, C.sky2, C.sky0)
  ctx.fillStyle = _WOOD; ctx.fillRect(Math.floor(w * 0.46), sy - 18, 3, 18); ctx.fillRect(Math.floor(w * 0.55), sy - 18, 3, 18); ctx.fillRect(Math.floor(w * 0.46), sy - 18, 12, 3); ctx.fillRect(Math.floor(w * 0.46), sy - 30, 3, 12)
  // footlights
  for (let x = 10; x < w - 8; x += 18) { ctx.fillStyle = C.lamp; ctx.fillRect(x, sy - 2, 4, 2); lampCone(ctx, x + 2, sy - 2, 10, 12) }
  // audience rows in the dark
  ctx.fillStyle = '#070b0f'; ctx.fillRect(0, sy + 8, w, h - sy - 8)
  for (let y = sy + 12; y < h - 4; y += 9) for (let x = 8 + (y % 2) * 6; x < w - 8; x += 14) { ctx.fillStyle = '#10161c'; ctx.fillRect(x, y, 9, 5) }
  lampCone(ctx, Math.floor(w * 0.5), 16, 60, sy - 18)
}

const paintWarehouse: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  // high ribbon windows letting moonlight in
  for (let x = 8; x < w - 8; x += 34) {
    ctx.fillStyle = C.slate; ctx.fillRect(x, 6, 26, 12)
    ditherGrad(ctx, x + 2, 8, 22, 8, C.slateL, C.sky1)
    ctx.fillStyle = C.shadow; ctx.fillRect(x + 12, 6, 2, 12)
  }
  // roof trusses
  ctx.fillStyle = _METAL
  for (let x = 0; x < w; x += 40) { ctx.fillRect(x, 20, 2, 10); ctx.fillRect(x, 28, 40, 2) }
  // crate stacks
  const crate = (x: number, y: number, s: number) => {
    ctx.fillStyle = _WOOD; ctx.fillRect(x, y, s, s)
    ctx.fillStyle = _WOOD_L; ctx.fillRect(x, y, s, 2); ctx.fillRect(x, y, 2, s)
    ctx.fillStyle = C.shadow; ctx.fillRect(x + 2, y + Math.floor(s / 2), s - 4, 1)
  }
  crate(14, h - 50, 24); crate(40, h - 50, 24); crate(26, h - 74, 24)
  crate(w - 44, h - 44, 18); crate(w - 70, h - 44, 18)
  // hanging chain + hook
  ctx.fillStyle = _METAL; for (let y = 0; y < 36; y += 4) ctx.fillRect(Math.floor(w * 0.58), y, 2, 3)
  ctx.fillRect(Math.floor(w * 0.58) - 2, 36, 6, 3)
  // floor
  ctx.fillStyle = '#0c1014'; ctx.fillRect(0, h - 26, w, 26)
  for (let x = 0; x < w; x += 26) { ctx.fillStyle = '#11161b'; ctx.fillRect(x, h - 26, 1, 26) }
  lampCone(ctx, Math.floor(w * 0.4), 30, 44, h - 60)
  rainStreaks(ctx, w, 18, t)
}

const paintRooftop: ScenePainter = (ctx, w, h, t) => {
  // city far below beyond the parapet
  ditherGrad(ctx, 0, 0, w, Math.floor(h * 0.55), C.sky2, C.sky0)
  for (let x = 0; x < w; x += 14) {
    const bh = 6 + ((x * 13) % 22)
    ctx.fillStyle = C.bldg; ctx.fillRect(x, Math.floor(h * 0.55) - bh, 12, bh)
    ctx.fillStyle = (x % 28) ? C.winDim : C.win; ctx.fillRect(x + 3, Math.floor(h * 0.55) - bh + 3, 2, 2)
  }
  // parapet ledge
  ctx.fillStyle = '#10181f'; ctx.fillRect(0, Math.floor(h * 0.55), w, 6)
  ctx.fillStyle = C.slate; ctx.fillRect(0, Math.floor(h * 0.55), w, 2)
  // tar roof
  ditherGrad(ctx, 0, Math.floor(h * 0.55) + 6, w, h, '#0c1117', '#070b0f')
  // vents, pipe, water tank
  ctx.fillStyle = _METAL; ctx.fillRect(Math.floor(w * 0.18), h - 34, 18, 14)
  ctx.fillStyle = '#3a444e'; ctx.fillRect(Math.floor(w * 0.18), h - 34, 18, 3)
  ctx.fillStyle = _METAL; ctx.fillRect(Math.floor(w * 0.24), h - 40, 4, 6)
  const wx = Math.floor(w * 0.72)
  ctx.fillStyle = _WOOD; ctx.fillRect(wx, h - 64, 30, 26)
  ctx.fillStyle = _WOOD_L; ctx.fillRect(wx, h - 64, 30, 3)
  ctx.fillStyle = _METAL; ctx.fillRect(wx + 4, h - 38, 2, 12); ctx.fillRect(wx + 24, h - 38, 2, 12)
  ctx.fillStyle = '#241c12'; ctx.fillRect(wx + 6, h - 70, 18, 6)
  // door bulkhead with a weak lamp
  ctx.fillStyle = '#0e151c'; ctx.fillRect(8, h - 56, 26, 30)
  ctx.fillStyle = C.slate; ctx.fillRect(8, h - 56, 26, 2)
  ctx.fillStyle = '#1a232c'; ctx.fillRect(14, h - 48, 12, 22)
  ctx.fillStyle = C.lamp; ctx.fillRect(19, h - 60, 4, 2)
  lampCone(ctx, 21, h - 58, 22, 28)
  rainStreaks(ctx, w, h, t)
}

const paintOffice: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  // blinds with light slicing through
  const bw = Math.floor(w * 0.3)
  ctx.fillStyle = C.sky2; ctx.fillRect(w - bw - 10, 8, bw, 44)
  for (let y = 10; y < 50; y += 4) { ctx.fillStyle = (y % 8) ? C.shadow : C.winDim; ctx.fillRect(w - bw - 10, y, bw, 2) }
  // filing cabinets
  for (let i = 0; i < 2; i++) {
    const x = 10 + i * 22
    ctx.fillStyle = _METAL; ctx.fillRect(x, h - 64, 18, 40)
    for (let d = 0; d < 3; d++) { ctx.fillStyle = '#3a444e'; ctx.fillRect(x + 2, h - 60 + d * 12, 14, 2); ctx.fillStyle = C.amberD; ctx.fillRect(x + 7, h - 57 + d * 12, 4, 1) }
  }
  // desk with papers, phone, banker's lamp
  const dy = h - 30
  ctx.fillStyle = _WOOD; ctx.fillRect(Math.floor(w * 0.3), dy, Math.floor(w * 0.52), 6)
  ctx.fillStyle = _WOOD_L; ctx.fillRect(Math.floor(w * 0.3), dy, Math.floor(w * 0.52), 2)
  ctx.fillStyle = '#241a12'; ctx.fillRect(Math.floor(w * 0.33), dy + 6, 8, h - dy - 6); ctx.fillRect(Math.floor(w * 0.72), dy + 6, 8, h - dy - 6)
  ctx.fillStyle = C.bone; ctx.fillRect(Math.floor(w * 0.38), dy - 4, 16, 4); ctx.fillRect(Math.floor(w * 0.42), dy - 6, 14, 2)
  ctx.fillStyle = '#15181d'; ctx.fillRect(Math.floor(w * 0.6), dy - 6, 12, 6)
  const lx = Math.floor(w * 0.5)
  ctx.fillStyle = C.amberD; ctx.fillRect(lx - 6, dy - 14, 13, 4); ctx.fillStyle = C.lamp; ctx.fillRect(lx - 4, dy - 10, 9, 2)
  lampCone(ctx, lx, dy - 9, 30, 26)
  // coat stand
  ctx.fillStyle = _WOOD; ctx.fillRect(w - 16, h - 58, 2, 34)
  ctx.fillStyle = C.sky2; ctx.fillRect(w - 22, h - 54, 10, 16)
  ctx.fillStyle = '#0c1117'; ctx.fillRect(0, h - 12, w, 12)
  rainStreaks(ctx, w - bw - 10 + 2, 50, t)
}

const paintLobby: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky2, C.sky0)
  // key wall behind the front desk
  ctx.fillStyle = _WOOD; ctx.fillRect(Math.floor(w * 0.28), 10, Math.floor(w * 0.44), 30)
  for (let y = 14; y < 36; y += 7) for (let x = Math.floor(w * 0.3); x < Math.floor(w * 0.7); x += 8) {
    ctx.fillStyle = '#241a10'; ctx.fillRect(x, y, 5, 5)
    if ((x + y) % 3) { ctx.fillStyle = C.amber; ctx.fillRect(x + 2, y + 1, 1, 3) }
  }
  // big lobby clock
  ctx.fillStyle = _WOOD; ctx.fillRect(w - 36, 8, 22, 26)
  ctx.fillStyle = C.bone; ctx.fillRect(w - 33, 11, 16, 16)
  ctx.fillStyle = C.shadow; ctx.fillRect(w - 26, 14, 2, 6); ctx.fillRect(w - 26, 19, 5, 2)
  // front desk
  const dy = Math.floor(h * 0.56)
  ctx.fillStyle = _WOOD_L; ctx.fillRect(Math.floor(w * 0.2), dy, Math.floor(w * 0.6), 5)
  ctx.fillStyle = _WOOD; ctx.fillRect(Math.floor(w * 0.2), dy + 5, Math.floor(w * 0.6), 22)
  for (let x = Math.floor(w * 0.24); x < Math.floor(w * 0.78); x += 16) { ctx.fillStyle = '#241a10'; ctx.fillRect(x, dy + 8, 10, 14) }
  // service bell + register book
  ctx.fillStyle = C.amber; ctx.fillRect(Math.floor(w * 0.44), dy - 4, 6, 3); ctx.fillStyle = C.amberD; ctx.fillRect(Math.floor(w * 0.46), dy - 6, 2, 2)
  ctx.fillStyle = C.bone; ctx.fillRect(Math.floor(w * 0.56), dy - 3, 14, 3)
  // checkered marble floor
  for (let y = dy + 27; y < h; y += 6) for (let x = ((y / 6) % 2) * 6; x < w; x += 12) { ctx.fillStyle = '#11181f'; ctx.fillRect(x, y, 6, 6) }
  ctx.fillStyle = '#0b1016'; ctx.fillRect(0, dy + 27, w, 1)
  // twin sconces
  for (const fx of [0.12, 0.88]) {
    const sx = Math.floor(w * fx)
    ctx.fillStyle = C.amberD; ctx.fillRect(sx - 2, 22, 5, 6); ctx.fillStyle = C.lamp; ctx.fillRect(sx - 1, 20, 3, 2)
    lampCone(ctx, sx, 28, 20, 30)
  }
  lampCone(ctx, Math.floor(w * 0.5), 6, 54, dy - 8)
}

const paintStation: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, Math.floor(h * 0.5), C.sky1, C.sky0)
  // canopy + supports
  ctx.fillStyle = '#10181f'; ctx.fillRect(0, 0, w, 12)
  ctx.fillStyle = C.slate; ctx.fillRect(0, 12, w, 2)
  for (let x = 20; x < w; x += 60) { ctx.fillStyle = _METAL; ctx.fillRect(x, 14, 3, Math.floor(h * 0.62) - 14) }
  // hanging station clock
  const cx = Math.floor(w * 0.5)
  ctx.fillStyle = _METAL; ctx.fillRect(cx - 1, 14, 2, 8)
  ctx.fillStyle = '#10181f'; ctx.fillRect(cx - 8, 22, 16, 16)
  ctx.fillStyle = C.bone; ctx.fillRect(cx - 6, 24, 12, 12)
  ctx.fillStyle = C.shadow; ctx.fillRect(cx - 1, 27, 2, 4); ctx.fillRect(cx - 1, 29, 4, 2)
  // platform edge
  const py = Math.floor(h * 0.62)
  ctx.fillStyle = '#11181f'; ctx.fillRect(0, py, w, 8)
  ctx.fillStyle = C.bone; for (let x = 0; x < w; x += 10) ctx.fillRect(x, py, 6, 2)
  // tracks below
  ctx.fillStyle = '#070b0f'; ctx.fillRect(0, py + 8, w, h - py - 8)
  for (let x = 0; x < w; x += 12) { ctx.fillStyle = _WOOD; ctx.fillRect(x, py + 14, 8, 3) }
  ctx.fillStyle = _METAL; ctx.fillRect(0, py + 12, w, 2); ctx.fillRect(0, py + 22, w, 2)
  // bench + abandoned suitcase
  ctx.fillStyle = _WOOD; ctx.fillRect(Math.floor(w * 0.14), py - 14, 30, 4); ctx.fillRect(Math.floor(w * 0.14) + 2, py - 10, 3, 10); ctx.fillRect(Math.floor(w * 0.14) + 25, py - 10, 3, 10)
  ctx.fillStyle = '#5a4a2a'; ctx.fillRect(Math.floor(w * 0.55), py - 10, 14, 10); ctx.fillStyle = '#3e331d'; ctx.fillRect(Math.floor(w * 0.55) + 6, py - 10, 2, 10)
  // departures board
  ctx.fillStyle = '#0a0f14'; ctx.fillRect(w - 64, 18, 48, 22)
  for (let i = 0; i < 3; i++) { ctx.fillStyle = i === 1 ? C.amber : C.winDim; ctx.fillRect(w - 60, 22 + i * 6, 28 - i * 6, 2) }
  lampCone(ctx, Math.floor(w * 0.3), 14, 40, py - 20)
  rainStreaks(ctx, w, 12, t)
}

const paintGarage: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  // segmented rolling door
  const dw = Math.floor(w * 0.4)
  ctx.fillStyle = '#10181f'; ctx.fillRect(w - dw - 8, 8, dw, Math.floor(h * 0.6))
  for (let y = 10; y < Math.floor(h * 0.6); y += 8) { ctx.fillStyle = C.slate; ctx.fillRect(w - dw - 8, y, dw, 2) }
  // pegboard of tools
  ctx.fillStyle = _WOOD; ctx.fillRect(10, 10, Math.floor(w * 0.3), 34)
  for (let x = 14; x < Math.floor(w * 0.3); x += 8) { ctx.fillStyle = _METAL; ctx.fillRect(x, 14, 2, 10 + (x % 3) * 4) }
  ctx.fillStyle = '#3a444e'; ctx.fillRect(14, 36, Math.floor(w * 0.26), 2)
  // car under tarp
  const cy = h - 40
  ctx.fillStyle = C.slate; ctx.fillRect(Math.floor(w * 0.16), cy, Math.floor(w * 0.5), 18)
  ctx.fillStyle = C.slateL; ctx.fillRect(Math.floor(w * 0.2), cy - 8, Math.floor(w * 0.34), 8)
  ctx.fillStyle = C.shadow; ctx.fillRect(Math.floor(w * 0.22), cy + 18, 10, 5); ctx.fillRect(Math.floor(w * 0.52), cy + 18, 10, 5)
  // oil stain + dropped wrench
  ctx.fillStyle = '#05080b'; ctx.fillRect(Math.floor(w * 0.72), h - 16, 22, 6)
  ctx.fillStyle = _METAL; ctx.fillRect(Math.floor(w * 0.78), h - 22, 10, 2); ctx.fillRect(Math.floor(w * 0.86), h - 24, 3, 6)
  ctx.fillStyle = '#0c1014'; ctx.fillRect(0, h - 12, w, 12)
  // caged work light
  const lx = Math.floor(w * 0.38)
  ctx.fillStyle = C.shadow; ctx.fillRect(lx, 0, 1, 10)
  ctx.fillStyle = _METAL; ctx.fillRect(lx - 4, 10, 9, 6)
  ctx.fillStyle = C.lamp; ctx.fillRect(lx - 2, 12, 5, 3)
  lampCone(ctx, lx, 16, 40, cy - 14)
}

const paintChapel: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, '#100c14', '#080610')
  // tall stained-glass window
  const gx = Math.floor(w * 0.42)
  const gw = Math.floor(w * 0.16)
  ctx.fillStyle = C.shadow; ctx.fillRect(gx - 2, 6, gw + 4, 52)
  const tints = ['#5e1c1c', '#284149', '#5a4a2a', '#46506b']
  for (let y = 8; y < 54; y += 6) for (let x = gx; x < gx + gw; x += 5) { ctx.fillStyle = tints[((x + y) >> 2) % tints.length]; ctx.fillRect(x, y, 4, 5) }
  ctx.fillStyle = C.shadow; ctx.fillRect(gx + Math.floor(gw / 2), 6, 2, 52); ctx.fillRect(gx - 2, 28, gw + 4, 2)
  // moonlight pooling beneath the glass
  lampCone(ctx, gx + Math.floor(gw / 2), 58, 40, 40)
  // altar with candles
  const ay = Math.floor(h * 0.6)
  ctx.fillStyle = _WOOD; ctx.fillRect(gx - 10, ay, gw + 20, 6)
  ctx.fillStyle = C.bone; ctx.fillRect(gx - 8, ay - 2, gw + 16, 2)
  for (let i = 0; i < 4; i++) {
    const x = gx - 6 + i * Math.floor((gw + 12) / 3)
    ctx.fillStyle = C.bone; ctx.fillRect(x, ay - 8, 2, 6)
    ctx.fillStyle = C.amber; ctx.fillRect(x, ay - 10, 2, 2)
  }
  // pews receding
  for (let i = 0; i < 3; i++) {
    const y = ay + 14 + i * 12
    ctx.fillStyle = _WOOD; ctx.fillRect(14 - i * 2, y, w - 28 + i * 4, 5)
    ctx.fillStyle = '#241a10'; ctx.fillRect(14 - i * 2, y + 5, w - 28 + i * 4, 2)
  }
  ctx.fillStyle = '#06040a'; ctx.fillRect(0, h - 8, w, 8)
}

const paintGallery: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky2, C.sky0)
  // hung canvases, one conspicuously missing
  const art = [[14, 0.26, '#284149'], [Math.floor(w * 0.3), 0.2, '#5a4a2a'], [Math.floor(w * 0.62), 0.24, '#46506b']] as [number, number, string][]
  for (const [x, fw, tint] of art) {
    const aw = Math.floor(w * fw)
    ctx.fillStyle = _WOOD_L; ctx.fillRect(x - 2, 12, aw + 4, 34)
    ditherGrad(ctx, x, 14, aw, 30, tint, C.sky0)
    ctx.fillStyle = C.shadow; ctx.fillRect(x, 44, aw, 2)
  }
  // the empty frame - pale rectangle where a painting was
  const ex = Math.floor(w * 0.48)
  ctx.fillStyle = _WOOD_L; ctx.fillRect(ex - 2, 12, 24, 34)
  ctx.fillStyle = '#1d2832'; ctx.fillRect(ex, 14, 20, 30)
  ctx.fillStyle = C.bone; ctx.fillRect(ex + 2, 16, 16, 26)
  ctx.fillStyle = C.ox; ctx.fillRect(ex + 6, 26, 8, 2)
  // velvet rope line
  for (let x = 10; x < w - 10; x += 36) { ctx.fillStyle = _METAL; ctx.fillRect(x, h - 38, 2, 16) }
  ctx.fillStyle = C.ox; for (let x = 12; x < w - 12; x += 4) ctx.fillRect(x, h - 34 + ((x >> 2) % 2), 3, 2)
  // pedestal with small bust
  const px2 = Math.floor(w * 0.82)
  ctx.fillStyle = C.slate; ctx.fillRect(px2, h - 44, 12, 22)
  ctx.fillStyle = C.slateL; ctx.fillRect(px2, h - 44, 12, 2)
  ctx.fillStyle = C.bone; ctx.fillRect(px2 + 3, h - 52, 6, 8)
  // polished floor
  ctx.fillStyle = '#0d141b'; ctx.fillRect(0, h - 20, w, 20)
  for (let x = 0; x < w; x += 18) { ctx.fillStyle = '#121a22'; ctx.fillRect(x, h - 20, 1, 20) }
  for (const [x, fw] of art) lampCone(ctx, x + Math.floor((w * fw) / 2), 8, Math.floor(w * fw), 30)
  lampCone(ctx, ex + 10, 8, 26, 30)
}

const paintCellar: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, '#120e0a', '#080604')
  // stone arch ribs
  for (let x = 8; x < w; x += 44) {
    ctx.fillStyle = '#1d1812'; ctx.fillRect(x, 8, 6, h - 28)
    ctx.fillStyle = '#28201666'; ctx.fillRect(x, 8, 2, h - 28)
  }
  ctx.fillStyle = '#1d1812'; ctx.fillRect(0, 6, w, 4)
  // wine racks
  for (let y = 22; y < h - 40; y += 14) for (let x = 18; x < Math.floor(w * 0.4); x += 7) {
    ctx.fillStyle = '#241a10'; ctx.fillRect(x, y, 6, 10)
    ctx.fillStyle = '#0f2418'; ctx.fillRect(x + 1, y + 2, 4, 4)
  }
  // barrels on their sides
  for (let i = 0; i < 2; i++) {
    const x = Math.floor(w * 0.55) + i * 34
    ctx.fillStyle = _WOOD; ctx.fillRect(x, h - 48, 26, 22)
    ctx.fillStyle = _WOOD_L; ctx.fillRect(x, h - 48, 26, 3)
    ctx.fillStyle = _METAL; ctx.fillRect(x, h - 44, 26, 2); ctx.fillRect(x, h - 32, 26, 2)
    ctx.fillStyle = '#241a10'; ctx.fillRect(x + 11, h - 40, 4, 6)
  }
  // candle lantern on a crate
  const cx = Math.floor(w * 0.34)
  ctx.fillStyle = _WOOD; ctx.fillRect(cx, h - 38, 16, 14)
  ctx.fillStyle = _METAL; ctx.fillRect(cx + 4, h - 50, 8, 12)
  ctx.fillStyle = C.amber; ctx.fillRect(cx + 6, h - 46, 4, 6)
  lampCone(ctx, cx + 8, h - 44, 26, 22)
  // dirt floor
  ctx.fillStyle = '#0c0906'; ctx.fillRect(0, h - 18, w, 18)
  for (let x = 4; x < w; x += 11) { ctx.fillStyle = '#141009'; ctx.fillRect(x, h - 14 + (x % 3), 4, 2) }
}

const paintGreenhouse: ScenePainter = (ctx, w, h, t) => {
  // glass panes against the night sky
  ditherGrad(ctx, 0, 0, w, h, '#0e1d1a', '#081210')
  ctx.fillStyle = _METAL
  for (let x = 0; x < w; x += 24) ctx.fillRect(x, 0, 2, Math.floor(h * 0.6))
  for (let y = 0; y < Math.floor(h * 0.6); y += 16) ctx.fillRect(0, y, w, 2)
  // slanted roof line
  for (let x = 0; x < w; x += 8) { ctx.fillStyle = '#10202b44'; ctx.fillRect(x, Math.floor(x / 12), 6, 1) }
  // planting benches with foliage
  const by = Math.floor(h * 0.62)
  ctx.fillStyle = _WOOD; ctx.fillRect(6, by, Math.floor(w * 0.38), 4); ctx.fillRect(Math.floor(w * 0.56), by, Math.floor(w * 0.38), 4)
  ctx.fillStyle = '#241a10'; ctx.fillRect(10, by + 4, 3, h - by - 14); ctx.fillRect(Math.floor(w * 0.38) - 6, by + 4, 3, h - by - 14)
  ctx.fillRect(Math.floor(w * 0.56) + 4, by + 4, 3, h - by - 14); ctx.fillRect(Math.floor(w * 0.92), by + 4, 3, h - by - 14)
  const leaf = ['#1d4a2c', '#14401f', '#2c5e38']
  for (let x = 8; x < Math.floor(w * 0.42); x += 6) { ctx.fillStyle = leaf[(x >> 1) % 3]; ctx.fillRect(x, by - 6 - (x % 5), 4, 6 + (x % 5)) }
  for (let x = Math.floor(w * 0.58); x < Math.floor(w * 0.92); x += 6) { ctx.fillStyle = leaf[(x >> 2) % 3]; ctx.fillRect(x, by - 5 - (x % 4), 4, 5 + (x % 4)) }
  // overturned pot + trowel on the path
  ctx.fillStyle = '#6b3a2e'; ctx.fillRect(Math.floor(w * 0.46), h - 16, 10, 6)
  ctx.fillStyle = '#0c0906'; ctx.fillRect(Math.floor(w * 0.44), h - 11, 8, 3)
  ctx.fillStyle = _METAL; ctx.fillRect(Math.floor(w * 0.5), h - 9, 8, 2)
  // stone path
  ctx.fillStyle = '#10161c'; ctx.fillRect(Math.floor(w * 0.42), by + 4, Math.floor(w * 0.14), h - by - 4)
  lampCone(ctx, Math.floor(w * 0.5), 4, 50, by - 6)
  rainStreaks(ctx, w, Math.floor(h * 0.55), t)
}

const paintDiner: ScenePainter = (ctx, w, h, t) => {
  ditherGrad(ctx, 0, 0, w, h, C.sky1, C.sky0)
  // big window with the street outside
  const wx = Math.floor(w * 0.55)
  ctx.fillStyle = C.shadow; ctx.fillRect(wx - 2, 8, w - wx - 8, 40)
  ditherGrad(ctx, wx, 10, w - wx - 12, 36, C.sky2, C.sky0)
  for (let x = wx + 4; x < w - 16; x += 12) { ctx.fillStyle = C.bldg; ctx.fillRect(x, 26, 8, 20) ; ctx.fillStyle = C.winDim; ctx.fillRect(x + 2, 30, 2, 2) }
  // reversed window lettering
  ctx.fillStyle = C.amberD; for (let i = 0; i < 5; i++) ctx.fillRect(wx + 6 + i * 9, 14, 6, 2)
  // counter with pie stand and coffee pot
  const cy = Math.floor(h * 0.58)
  ctx.fillStyle = '#3a6b6b'; ctx.fillRect(0, cy, Math.floor(w * 0.5), 5)
  ctx.fillStyle = '#284149'; ctx.fillRect(0, cy + 5, Math.floor(w * 0.5), h - cy - 17)
  ctx.fillStyle = C.bone; ctx.fillRect(14, cy - 10, 12, 8); ctx.fillStyle = C.slateL; ctx.fillRect(12, cy - 12, 16, 2)
  ctx.fillStyle = _METAL; ctx.fillRect(38, cy - 9, 8, 9); ctx.fillStyle = C.amberD; ctx.fillRect(40, cy - 11, 4, 2)
  // stools
  for (let i = 0; i < 3; i++) { const x = 10 + i * 22; ctx.fillStyle = C.ox; ctx.fillRect(x, h - 20, 12, 3); ctx.fillStyle = _METAL; ctx.fillRect(x + 5, h - 17, 2, 17) }
  // booth by the window
  ctx.fillStyle = C.ox; ctx.fillRect(wx + 2, h - 36, 8, 24); ctx.fillRect(w - 22, h - 36, 8, 24)
  ctx.fillStyle = '#6b2222'; ctx.fillRect(wx + 2, h - 36, 8, 3); ctx.fillRect(w - 22, h - 36, 8, 3)
  ctx.fillStyle = _WOOD; ctx.fillRect(wx + 12, h - 26, w - wx - 36, 4)
  ctx.fillStyle = C.bone; ctx.fillRect(wx + 18, h - 30, 8, 4)
  // checkered floor
  for (let y = h - 12; y < h; y += 6) for (let x = ((y / 6) % 2) * 6; x < w; x += 12) { ctx.fillStyle = '#11181f'; ctx.fillRect(x, y, 6, 6) }
  lampCone(ctx, Math.floor(w * 0.25), 6, 40, cy - 10)
  rainStreaks(ctx, w - wx, 38, t)
}

const paintVault: ScenePainter = (ctx, w, h) => {
  ditherGrad(ctx, 0, 0, w, h, '#11141c', '#080a10')
  // wall of deposit boxes
  for (let y = 10; y < h - 40; y += 10) for (let x = 8; x < Math.floor(w * 0.38); x += 12) {
    ctx.fillStyle = _METAL; ctx.fillRect(x, y, 10, 8)
    ctx.fillStyle = '#3a444e'; ctx.fillRect(x, y, 10, 1)
    ctx.fillStyle = C.amberD; ctx.fillRect(x + 4, y + 3, 2, 2)
  }
  // one box pulled open
  ctx.fillStyle = '#05080b'; ctx.fillRect(32, 40, 10, 8)
  ctx.fillStyle = _METAL; ctx.fillRect(30, 46, 14, 3)
  // massive round vault door ajar on the right
  const cx = Math.floor(w * 0.72)
  const cy2 = Math.floor(h * 0.45)
  for (let r = 26; r > 4; r -= 4) {
    ctx.fillStyle = r % 8 ? '#2d3640' : '#3a444e'
    ctx.fillRect(cx - r, cy2 - r, r * 2, r * 2)
  }
  ctx.fillStyle = '#10141a'; ctx.fillRect(cx - 4, cy2 - 4, 8, 8)
  // spoke handle
  ctx.fillStyle = C.bone
  ctx.fillRect(cx - 14, cy2 - 1, 28, 2); ctx.fillRect(cx - 1, cy2 - 14, 2, 28)
  // hinge gap of darkness - the door stands open
  ctx.fillStyle = '#020304'; ctx.fillRect(cx + 24, cy2 - 28, 10, 56)
  // scattered bills on the floor
  ctx.fillStyle = '#0b0e14'; ctx.fillRect(0, h - 24, w, 24)
  for (let i = 0; i < 6; i++) { const x = 20 + i * Math.floor(w * 0.13); ctx.fillStyle = i % 2 ? '#1d5a2c' : C.bone; ctx.fillRect(x, h - 18 + (i % 3) * 3, 8, 4) }
  lampCone(ctx, Math.floor(w * 0.4), 2, 50, h - 30)
}

export const SCENES: Record<string, ScenePainter> = {
  skyline: paintSkyline, desk: paintDesk, atrium: paintAtrium, interro: paintInterro,
  seawall: paintSeawall, mezzanine: paintMezzanine, map: paintMap,
  kitchen: paintKitchen, study: paintStudy, parlor: paintParlor, bedroom: paintBedroom,
  alley: paintAlley, bar: paintBar, casino: paintCasino, theater: paintTheater,
  warehouse: paintWarehouse, rooftop: paintRooftop, office: paintOffice, lobby: paintLobby,
  station: paintStation, garage: paintGarage, chapel: paintChapel, gallery: paintGallery,
  cellar: paintCellar, greenhouse: paintGreenhouse, diner: paintDiner, vault: paintVault,
}

// Map a free-text location name (generated cases invent rooms) to the closest set.
// First match wins - keep the specific venues above the generic interiors.
const _ROOM_MAP: [RegExp, string][] = [
  [/alley|backstreet|side\s*street|passage(way)?\b/i, 'alley'],
  [/\bbar\b|tavern|pub\b|saloon|speakeas|taproom|cantina|nightclub|club\s*floor/i, 'bar'],
  [/casino|card\s*room|gambling|poker|roulette|betting/i, 'casino'],
  [/theat|stage|auditorium|opera|cabaret|backstage|dressing\s*room|rehearsal/i, 'theater'],
  [/warehouse|store\s*room|storage|loading|depot|freight|cargo/i, 'warehouse'],
  [/rooftop|roof\b|widow'?s\s*walk/i, 'rooftop'],
  [/office|bureau|headquarters|newsroom|press\s*room|precinct/i, 'office'],
  [/lobby|reception|front\s*desk|concierge|check[-\s]?in/i, 'lobby'],
  [/station|platform|train|railway|terminus|tram/i, 'station'],
  [/garage|workshop|mechanic|motor|boathouse|shed|barn|stable/i, 'garage'],
  [/chapel|church|cathedral|shrine|sanctuary|cloister|vestry/i, 'chapel'],
  [/gallery|museum|exhibit|auction|studio|atelier/i, 'gallery'],
  [/cellar|basement|wine\b|crypt|undercroft|catacomb|tunnel/i, 'cellar'],
  [/vault|safe\s*room|strong\s*room|\bbank\b|deposit|counting\s*house/i, 'vault'],
  [/greenhouse|conservatory|garden|orchard|arboretum|nursery\s*garden/i, 'greenhouse'],
  [/diner|caf[eé]|coffee|canteen|tea\s*room|bistro|restaurant/i, 'diner'],
  [/kitchen|pantry|galley|scullery|bakery/i, 'kitchen'],
  [/librar|study|den\b|archive|records|reading\s*room/i, 'study'],
  [/bed|chamber|boudoir|suite|nursery|dormitor/i, 'bedroom'],
  [/mezzanine|\brail\b|balcon|landing|stairwell/i, 'mezzanine'],
  [/dock|harbou?r|pier|seawall|wharf|seaside|waterfront|quay|marina|lighthouse/i, 'seawall'],
  [/parlou?r|lounge|living|sitting|drawing|salon|terrace|veranda|smoking\s*room/i, 'parlor'],
  [/hall|foyer|ballroom|atrium|dining|entrance|stair|court/i, 'atrium'],
]

export function sceneForRoom(name: string): ScenePainter {
  for (const [re, key] of _ROOM_MAP) if (re.test(name || '')) return SCENES[key]
  return SCENES.parlor // generic interior
}

// ---- exhibit illustrations ----
// Each exhibit gets a procedural "evidence photo": the object, large, on a forensic
// table under a spot, with a measuring strip. The kind is read from the exhibit's
// own words so a letter looks like a letter and a vial looks like a vial.
export type ExhibitKind =
  | 'letter' | 'photo' | 'ledger' | 'key' | 'blade' | 'bottle' | 'watch' | 'fabric'
  | 'flame' | 'ticket' | 'jewel' | 'phone' | 'recorder' | 'print' | 'cash' | 'rope'
  | 'boot' | 'bag'

// ORDER MATTERS - specific kinds sit above broad word-matches so "letter opener" is a
// blade (not a letter), "matchbook" is a flame (not a book), "footprint" is a boot
// (not a fingerprint), and "recording" is a tape (not a ledger record).
const _EX_RULES: [RegExp, ExhibitKind][] = [
  [/photo|polaroid|portrait|snapshot|negative|film/i, 'photo'],
  [/tape|recorder|recording|reel\b|voicemail|dictaphone|cylinder/i, 'recorder'],
  [/knife|blade|dagger|letter\s*opener|razor|scissor|shard|glass\s+fragment/i, 'blade'],
  [/vial|poison|bottle|flask|tonic|medicine|pill|powder|arsenic|cyanide|decanter|wine|whisky/i, 'bottle'],
  [/watch|clock|timepiece/i, 'watch'],
  [/match|lighter|accelerant|kerosene|petrol|gasoline|\bash(es)?\b|burn|scorch|cigar|cigarette/i, 'flame'],
  [/footprint|boot|shoe|heel|track\b|tread/i, 'boot'],
  [/fingerprint|\bprints?\b|smudge|handprint/i, 'print'],
  [/keycard|access|badge|pass\b|\bkeys?\b|lockpick|latch/i, 'key'],
  [/ring\b|necklace|brooch|jewel|diamond|pearl|locket|pendant|bracelet|gem/i, 'jewel'],
  [/phone|telephone|pager|wire\s*tap/i, 'phone'],
  [/ticket|stub|pawn|receipt|invoice|bill\b|cheque|check\b|voucher|claim/i, 'ticket'],
  [/cash|money|bills|banknote|currency|wad\b|payment|bribe|coin|wallet/i, 'cash'],
  [/rope|cord|wire\b|cable|twine|strap|belt/i, 'rope'],
  [/glove|scarf|fabric|fibre|fiber|cloth|thread|handkerchief|button|cufflink|coat|shawl|silk/i, 'fabric'],
  [/ledger|\bbook\b|journal|diary|register|contract|deed|will\b|manifest|statement|\brecords\b/i, 'ledger'],
  [/letter|note\b|envelope|telegram|correspondence|memo|page|paper/i, 'letter'],
]

export function exhibitKindFor(name: string, summary = ''): ExhibitKind {
  const hay = `${name} ${summary}`
  for (const [re, kind] of _EX_RULES) if (re.test(hay)) return kind
  return 'bag'
}

function exBase(ctx: CanvasRenderingContext2D, w: number, h: number): void {
  ditherGrad(ctx, 0, 0, w, h, '#141a21', '#0a0e13')
  lampCone(ctx, Math.floor(w / 2), 0, Math.floor(w * 0.9), h)
  // forensic measuring strip
  ctx.fillStyle = C.bone; ctx.fillRect(6, h - 7, Math.floor(w * 0.4), 3)
  ctx.fillStyle = '#0a0e13'
  for (let x = 8; x < 6 + Math.floor(w * 0.4); x += 5) ctx.fillRect(x, h - 7, 1, 3)
  // evidence tag in the corner
  ctx.fillStyle = C.amberD; ctx.fillRect(w - 20, h - 12, 14, 8)
  ctx.fillStyle = '#3a2a10'; ctx.fillRect(w - 18, h - 9, 10, 1); ctx.fillRect(w - 18, h - 7, 7, 1)
}

type ExPainter = (ctx: CanvasRenderingContext2D, w: number, h: number, s: number) => void

const _EX_PAINT: Record<ExhibitKind, ExPainter> = {
  letter: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 22
    const cy = Math.floor(h / 2) - 14
    // open envelope behind
    ctx.fillStyle = '#b3ac96'; ctx.fillRect(cx - 6, cy + 12, 34, 18)
    ctx.fillStyle = '#9d977f'; ctx.fillRect(cx - 6, cy + 12, 34, 2)
    // folded letter, slightly rotated feel via offset slabs
    ctx.fillStyle = C.bone; ctx.fillRect(cx + 8, cy - 6, 36, 26)
    ctx.fillStyle = '#fdf9ec'; ctx.fillRect(cx + 8, cy - 6, 36, 3)
    ctx.fillStyle = '#3a3428'
    for (let i = 0; i < 5; i++) ctx.fillRect(cx + 12, cy + (i * 4), 24 - ((s + i) % 3) * 5, 1)
    // wax seal or ink blot
    ctx.fillStyle = s % 2 ? C.ox : '#1c222a'; ctx.fillRect(cx + 34, cy + 12, 5, 5)
  },
  photo: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 20
    const cy = Math.floor(h / 2) - 17
    ctx.fillStyle = C.bone; ctx.fillRect(cx, cy, 44, 38)
    ctx.fillStyle = '#10161d'; ctx.fillRect(cx + 4, cy + 4, 36, 24)
    // two silhouettes caught in frame
    ctx.fillStyle = '#222b35'
    ctx.fillRect(cx + 10 + (s % 4), cy + 12, 7, 16); ctx.fillRect(cx + 12 + (s % 4), cy + 8, 4, 5)
    ctx.fillRect(cx + 24, cy + 14, 7, 14); ctx.fillRect(cx + 26, cy + 10, 4, 5)
    ctx.fillStyle = C.winDim; ctx.fillRect(cx + 34, cy + 6, 3, 3)
    // bent corner
    ctx.fillStyle = '#9d977f'; ctx.fillRect(cx + 40, cy + 34, 4, 4)
  },
  ledger: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 26
    const cy = Math.floor(h / 2) - 14
    ctx.fillStyle = '#241a10'; ctx.fillRect(cx - 2, cy - 2, 56, 32)
    ctx.fillStyle = C.bone; ctx.fillRect(cx, cy, 26, 28); ctx.fillRect(cx + 27, cy, 25, 28)
    ctx.fillStyle = '#0a0e13'; ctx.fillRect(cx + 26, cy, 1, 28)
    ctx.fillStyle = '#3a3428'
    for (let i = 0; i < 6; i++) { ctx.fillRect(cx + 3, cy + 4 + i * 4, 20, 1); ctx.fillRect(cx + 30, cy + 4 + i * 4, 19, 1) }
    // the flagged entry
    ctx.fillStyle = C.ox; ctx.fillRect(cx + 30, cy + 4 + ((s % 4) + 1) * 4 - 1, 19, 3)
  },
  key: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 18
    const cy = Math.floor(h / 2) - 2
    if (s % 2) {
      // hotel key with fob
      ctx.fillStyle = '#b8b7ad'; ctx.fillRect(cx, cy - 3, 26, 4)
      ctx.fillRect(cx + 24, cy + 1, 3, 6); ctx.fillRect(cx + 18, cy + 1, 3, 4)
      ctx.fillStyle = '#8d8c82'; ctx.fillRect(cx - 8, cy - 7, 10, 10)
      ctx.fillStyle = '#0a0e13'; ctx.fillRect(cx - 5, cy - 4, 4, 4)
      ctx.fillStyle = C.ox; ctx.fillRect(cx + 32, cy - 8, 14, 9)
      ctx.fillStyle = C.bone; ctx.fillRect(cx + 35, cy - 5, 8, 3)
    } else {
      // access card
      ctx.fillStyle = '#2d4a52'; ctx.fillRect(cx - 4, cy - 12, 42, 26)
      ctx.fillStyle = '#3a6b6b'; ctx.fillRect(cx - 4, cy - 12, 42, 5)
      ctx.fillStyle = C.amber; ctx.fillRect(cx, cy - 2, 10, 8)
      ctx.fillStyle = C.bone; ctx.fillRect(cx + 14, cy, 18, 2); ctx.fillRect(cx + 14, cy + 4, 12, 2)
    }
  },
  blade: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 24
    const cy = Math.floor(h / 2)
    // blade with taper
    ctx.fillStyle = '#c2c8cc'
    for (let i = 0; i < 30; i++) ctx.fillRect(cx + i, cy - 3 + (i >> 4), 1, 5 - (i >> 3))
    ctx.fillStyle = '#8a9298'; ctx.fillRect(cx, cy + 1, 28, 1)
    // guard + grip
    ctx.fillStyle = '#3a2c1c'; ctx.fillRect(cx + 30, cy - 5, 3, 9)
    ctx.fillStyle = '#55402a'; ctx.fillRect(cx + 33, cy - 3, 14, 6)
    ctx.fillStyle = '#241a10'; for (let i = 0; i < 3; i++) ctx.fillRect(cx + 35 + i * 4, cy - 3, 1, 6)
    // a dark stain near the tip when the story calls for it
    if (s % 3 !== 1) { ctx.fillStyle = '#4a1414'; ctx.fillRect(cx + 4, cy - 1, 6, 3) }
  },
  bottle: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 6
    const cy = Math.floor(h / 2) - 16
    const tint = s % 2 ? '#1d4a2c' : '#2d3a5e'
    ctx.fillStyle = tint; ctx.fillRect(cx, cy + 10, 14, 22)
    ctx.fillRect(cx + 4, cy + 2, 6, 9)
    ctx.fillStyle = '#3a2c1c'; ctx.fillRect(cx + 4, cy - 2, 6, 4)
    // liquid line + skull label
    ctx.fillStyle = s % 2 ? '#2c5e38' : '#46506b'; ctx.fillRect(cx + 2, cy + 18, 10, 12)
    ctx.fillStyle = C.bone; ctx.fillRect(cx + 3, cy + 14, 8, 8)
    ctx.fillStyle = '#0a0e13'; ctx.fillRect(cx + 5, cy + 16, 4, 3); ctx.fillRect(cx + 5, cy + 20, 1, 1); ctx.fillRect(cx + 8, cy + 20, 1, 1)
    // spilled drops
    ctx.fillStyle = tint; ctx.fillRect(cx + 18, cy + 30, 4, 2); ctx.fillRect(cx + 24, cy + 32, 2, 1)
  },
  watch: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 2
    const cy = Math.floor(h / 2) - 2
    // chain
    ctx.fillStyle = '#8d8c82'
    for (let i = 0; i < 7; i++) ctx.fillRect(cx + 12 + i * 3, cy - 14 + i * 2, 2, 2)
    // case rings
    for (let r = 14; r > 2; r -= 3) { ctx.fillStyle = r % 6 ? '#b8943e' : '#e3c06d'; ctx.fillRect(cx - r, cy - r, r * 2, r * 2) }
    ctx.fillStyle = C.bone; ctx.fillRect(cx - 8, cy - 8, 16, 16)
    // hands stopped at the hour of the crime
    ctx.fillStyle = '#0a0e13'
    ctx.fillRect(cx - 1, cy - 7 + (s % 3), 2, 8); ctx.fillRect(cx - 1, cy, 6 - (s % 3), 2)
    // cracked glass
    ctx.fillStyle = '#8a9298'; ctx.fillRect(cx + 2, cy - 6, 1, 5); ctx.fillRect(cx + 3, cy - 3, 3, 1)
  },
  fabric: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 20
    const cy = Math.floor(h / 2) - 10
    const tint = ['#5e1c1c', '#284149', '#46506b'][s % 3]
    // a torn swatch, ragged edges
    ctx.fillStyle = tint
    for (let y = 0; y < 22; y++) {
      const ragL = (y * 7 + s) % 4
      const ragR = (y * 5 + s) % 5
      ctx.fillRect(cx + ragL, cy + y, 38 - ragL - ragR, 1)
    }
    // weave lines + a loose thread
    ctx.fillStyle = '#00000033'
    for (let y = 2; y < 20; y += 3) ctx.fillRect(cx + 3, cy + y, 32, 1)
    ctx.fillStyle = tint
    ctx.fillRect(cx + 38, cy + 22, 2, 2); ctx.fillRect(cx + 41, cy + 25, 2, 1); ctx.fillRect(cx + 44, cy + 26, 3, 1)
    // monogram patch
    ctx.fillStyle = C.amber; ctx.fillRect(cx + 14, cy + 8, 8, 6)
    ctx.fillStyle = '#3a2a10'; ctx.fillRect(cx + 16, cy + 10, 4, 2)
  },
  flame: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 16
    const cy = Math.floor(h / 2) - 8
    if (s % 2) {
      // matchbook, one match torn out
      ctx.fillStyle = C.ox; ctx.fillRect(cx, cy, 26, 18)
      ctx.fillStyle = '#b8443f'; ctx.fillRect(cx, cy, 26, 4)
      ctx.fillStyle = C.bone; ctx.fillRect(cx + 4, cy + 7, 18, 7)
      ctx.fillStyle = '#3a2c1c'; for (let i = 0; i < 5; i++) ctx.fillRect(cx + 5 + i * 4, cy + 8, 2, 5)
      ctx.fillStyle = '#3a2c1c'; ctx.fillRect(cx + 32, cy + 6, 2, 10); ctx.fillStyle = C.amber; ctx.fillRect(cx + 31, cy + 3, 4, 4)
    } else {
      // scorched tin of accelerant
      ctx.fillStyle = '#8a4a1e'; ctx.fillRect(cx + 2, cy - 4, 20, 26)
      ctx.fillStyle = '#a8602a'; ctx.fillRect(cx + 2, cy - 4, 20, 3)
      ctx.fillStyle = '#241208'; ctx.fillRect(cx + 6, cy + 2, 12, 12)
      ctx.fillStyle = '#0a0e13'; ctx.fillRect(cx - 4, cy + 20, 34, 4)
      ctx.fillStyle = '#1c1209'; ctx.fillRect(cx + 24, cy + 16, 10, 6)
    }
  },
  ticket: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 24
    const cy = Math.floor(h / 2) - 9
    ctx.fillStyle = '#cfc0a0'; ctx.fillRect(cx, cy, 48, 20)
    ctx.fillStyle = '#b3a585'; ctx.fillRect(cx, cy, 48, 3)
    // perforation + torn half
    ctx.fillStyle = '#0a0e13'; for (let y = cy; y < cy + 20; y += 3) ctx.fillRect(cx + 33, y, 1, 2)
    ctx.fillStyle = '#3a3428'
    ctx.fillRect(cx + 4, cy + 7, 24, 2); ctx.fillRect(cx + 4, cy + 12, 16 + (s % 3) * 3, 2)
    ctx.fillStyle = C.ox; ctx.fillRect(cx + 37, cy + 5, 8, 8)
  },
  jewel: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2)
    const cy = Math.floor(h / 2) - 4
    // necklace chain pooled on the table
    ctx.fillStyle = '#e3c06d'
    for (let i = 0; i < 14; i++) ctx.fillRect(cx - 20 + i * 3, cy + 10 + Math.floor(Math.sin(i * 0.9 + s) * 3), 2, 2)
    // the stone
    const gem = ['#7ec8d8', '#c86a7a', '#8ad89a'][s % 3]
    ctx.fillStyle = '#b8943e'; ctx.fillRect(cx - 6, cy - 8, 12, 12)
    ctx.fillStyle = gem; ctx.fillRect(cx - 4, cy - 6, 8, 8)
    ctx.fillStyle = '#ffffff'; ctx.fillRect(cx - 3, cy - 5, 2, 2)
    // glints
    ctx.fillStyle = C.lamp; ctx.fillRect(cx + 8, cy - 12, 1, 3); ctx.fillRect(cx + 7, cy - 11, 3, 1)
  },
  phone: (ctx, w, h) => {
    const cx = Math.floor(w / 2) - 14
    const cy = Math.floor(h / 2) - 12
    // candlestick telephone - bright enough to read against the dark table
    ctx.fillStyle = '#3a444e'; ctx.fillRect(cx + 6, cy + 22, 20, 5); ctx.fillRect(cx + 12, cy + 6, 8, 17)
    ctx.fillStyle = '#5a6470'; ctx.fillRect(cx + 13, cy + 6, 2, 17); ctx.fillRect(cx + 7, cy + 22, 18, 2)
    // mouthpiece horn
    ctx.fillStyle = '#3a444e'; ctx.fillRect(cx + 6, cy - 2, 20, 8)
    ctx.fillStyle = '#5a6470'; ctx.fillRect(cx + 8, cy - 1, 16, 2)
    ctx.fillStyle = '#0a0e13'; ctx.fillRect(cx + 12, cy + 1, 8, 4)
    // rotary dial face
    ctx.fillStyle = C.bone; ctx.fillRect(cx + 12, cy + 14, 8, 6)
    ctx.fillStyle = '#0a0e13'; ctx.fillRect(cx + 15, cy + 16, 2, 2)
    // earpiece on its side hook + coiled cord
    ctx.fillStyle = '#3a444e'; ctx.fillRect(cx - 6, cy + 2, 8, 5); ctx.fillRect(cx - 4, cy + 7, 5, 10)
    ctx.fillStyle = '#5a6470'; ctx.fillRect(cx - 5, cy + 3, 6, 2)
    ctx.fillStyle = '#8a9298'
    for (let i = 0; i < 6; i++) ctx.fillRect(cx - 2 + ((i % 2) * 3), cy + 18 + i * 2, 2, 2)
  },
  recorder: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 22
    const cy = Math.floor(h / 2) - 12
    ctx.fillStyle = '#2a2f39'; ctx.fillRect(cx, cy, 44, 26)
    ctx.fillStyle = '#3a414e'; ctx.fillRect(cx, cy, 44, 4)
    // twin reels
    for (const rx of [cx + 11, cx + 31]) {
      ctx.fillStyle = '#0a0e13'; ctx.fillRect(rx - 7, cy + 8, 14, 14)
      ctx.fillStyle = '#43301f'; ctx.fillRect(rx - 5, cy + 10, 10, 10)
      ctx.fillStyle = C.bone; ctx.fillRect(rx - 1, cy + 14, 2, 2)
    }
    // tape strand + rec light
    ctx.fillStyle = '#43301f'; ctx.fillRect(cx + 13, cy + 9, 18, 1)
    ctx.fillStyle = s % 2 ? C.ox : '#4a1414'; ctx.fillRect(cx + 40, cy + 2, 2, 2)
  },
  print: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 18
    const cy = Math.floor(h / 2) - 14
    // print card
    ctx.fillStyle = C.bone; ctx.fillRect(cx, cy, 28, 30)
    ctx.fillStyle = '#0a0e13'
    // whorl
    for (let r = 9; r > 1; r -= 2) ctx.fillRect(cx + 14 - r, cy + 14 - r + (s % 2), r * 2, 1)
    for (let r = 8; r > 1; r -= 2) ctx.fillRect(cx + 14 - r, cy + 14 + r, r * 2, 1)
    ctx.fillRect(cx + 6, cy + 10, 1, 9); ctx.fillRect(cx + 22, cy + 9, 1, 9)
    // magnifier over the corner
    ctx.fillStyle = '#8d8c82'; ctx.fillRect(cx + 22, cy + 18, 14, 2)
    for (let r = 8; r > 5; r--) { ctx.fillStyle = '#b8b7ad'; ctx.fillRect(cx + 30 - r, cy + 12 - r, r * 2, r * 2) }
    ctx.fillStyle = '#1d2832aa'; ctx.fillRect(cx + 25, cy + 7, 10, 10)
  },
  cash: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 22
    const cy = Math.floor(h / 2) - 8
    // stacked banded bills
    for (let i = 0; i < 3; i++) {
      const y = cy + 12 - i * 6
      ctx.fillStyle = i % 2 ? '#1d5a2c' : '#14401f'; ctx.fillRect(cx + i * 3, y, 36, 6)
      ctx.fillStyle = '#2c5e38'; ctx.fillRect(cx + i * 3, y, 36, 1)
      ctx.fillStyle = C.bone; ctx.fillRect(cx + i * 3 + 14, y, 8, 6)
    }
    // loose bill + coins
    ctx.fillStyle = '#1d5a2c'; ctx.fillRect(cx + 40, cy + 14, 14, 7)
    ctx.fillStyle = C.bone; ctx.fillRect(cx + 45, cy + 16, 4, 3)
    ctx.fillStyle = '#e3c06d'; ctx.fillRect(cx - 8, cy + 18, 4, 4); ctx.fillRect(cx - 12, cy + 20 + (s % 2), 4, 4)
  },
  rope: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2)
    const cy = Math.floor(h / 2) + 2
    // coiled loops
    for (let r = 16; r > 4; r -= 4) {
      ctx.fillStyle = r % 8 ? '#8a6a3a' : '#a8854a'
      ctx.fillRect(cx - r, cy - Math.floor(r / 2), r * 2, Math.floor(r / 1.2))
      ctx.fillStyle = '#0a0e13'; ctx.fillRect(cx - r + 3, cy - Math.floor(r / 2) + 3, (r - 3) * 2, Math.floor(r / 1.4) - 4)
    }
    ctx.fillStyle = '#8a6a3a'; ctx.fillRect(cx - 4, cy - 2, 8, 6)
    // frayed end trailing off
    ctx.fillStyle = '#a8854a'
    for (let i = 0; i < 10; i++) ctx.fillRect(cx + 14 + i * 2, cy + 8 + ((i + s) % 3), 2, 2)
    ctx.fillStyle = '#6b4f2a'; ctx.fillRect(cx + 33, cy + 8, 1, 4); ctx.fillRect(cx + 35, cy + 9, 1, 3)
  },
  boot: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 12
    const cy = Math.floor(h / 2) - 14
    // plaster cast slab
    ctx.fillStyle = '#3a3022'; ctx.fillRect(cx - 8, cy - 2, 42, 34)
    ctx.fillStyle = '#4a3e2c'; ctx.fillRect(cx - 8, cy - 2, 42, 3)
    // boot tread pressed in
    ctx.fillStyle = '#241c12'
    ctx.fillRect(cx + 4, cy + 2, 16, 18); ctx.fillRect(cx + 6, cy + 22, 12, 6)
    ctx.fillStyle = '#15100a'
    for (let i = 0; i < 4; i++) ctx.fillRect(cx + 6, cy + 4 + i * 4, 12, 2)
    ctx.fillRect(cx + 7, cy + 23, 10, 2)
    // the worn-heel notch that gives it away
    ctx.fillStyle = '#4a3e2c'; ctx.fillRect(cx + 6 + (s % 3) * 3, cy + 24, 4, 3)
  },
  bag: (ctx, w, h, s) => {
    const cx = Math.floor(w / 2) - 18
    const cy = Math.floor(h / 2) - 12
    // sealed evidence bag with a small dark object inside
    ctx.fillStyle = '#c8d0d4'; ctx.fillRect(cx, cy, 36, 28)
    ctx.fillStyle = '#e2e8ea'; ctx.fillRect(cx, cy, 36, 5)
    ctx.fillStyle = C.ox; ctx.fillRect(cx, cy + 4, 36, 2)
    ctx.fillStyle = '#2a2f39'; ctx.fillRect(cx + 10 + (s % 3) * 2, cy + 12, 14, 9)
    ctx.fillStyle = '#15181d'; ctx.fillRect(cx + 12 + (s % 3) * 2, cy + 14, 10, 5)
    ctx.fillStyle = '#8a9298'; ctx.fillRect(cx + 4, cy + 24, 28, 1)
  },
}

/** Procedural painter for one exhibit, seeded by its id so each looks distinct. */
export function exhibitPainter(name: string, summary: string, seedKey: string): ScenePainter {
  const kind = exhibitKindFor(name, summary)
  const s = _hash(seedKey || name)
  return (ctx, w, h) => {
    exBase(ctx, w, h)
    _EX_PAINT[kind](ctx, w, h, s)
  }
}

export function sceneFor(name: string): ScenePainter {
  if (SCENES[name]) return SCENES[name]
  // "Building — Room" -> key the painter off the room (the part after the last dash).
  const room = /[—–]/.test(name) ? name.split(/[—–]/).pop()!.trim() : name
  return sceneForRoom(room)
}