/* ============================================================
   chibi.js — shared sprite engine for Brad Did Something
   Ported from "Character Sprite Sheet.html" v1.0 and extended
   with v2 emotional/talk poses, top-down floor sprites and a
   box-shadow pixel-glyph drawer (hearts, stars, drops, Z).
   Vanilla JS. Load with <script src="../assets/chibi.js">.
   Exposes window.BDSChibi.
   ============================================================ */
(function () {
  const DARK = "var(--bds-void)";

  /* ---------- shared styles (injected once) ---------- */
  const css = `
  .chibi { position: relative; transform-origin: bottom center; z-index: 2; }
  .chibi * { position: absolute; box-sizing: border-box; }
  .chibi .part { border: 3px solid var(--bds-void); }
  .chibi .head   { border-radius: 44% 44% 46% 46%; z-index: 4; }
  .chibi .hairpc { border: 3px solid var(--bds-void); z-index: 6; }
  .chibi .collar { border-radius: 50%; z-index: 5; }
  .chibi .torso  { border-radius: 42% 42% 26% 26%; z-index: 3; }
  .chibi .arm    { border-radius: 45%; z-index: 2; transform-origin: top center; }
  .chibi .hand   { border-radius: 50%; z-index: 3; }
  .chibi .leg    { border-radius: 22% 22% 30% 30%; z-index: 3; }
  .chibi .eye    { background: var(--bds-void); border-radius: 50%; z-index: 7; }
  .chibi .brow   { z-index: 8; border-radius: 2px; }
  .chibi .lash   { background: var(--bds-void); z-index: 8; }
  .chibi .glasses{ border: 3px solid var(--bds-void); background: transparent; border-radius: 36%; z-index: 8; }
  .chibi .bridge { background: var(--bds-void); z-index: 8; }
  .chibi .mouth  { z-index: 7; }
  .chibi .blush  { z-index: 7; border-radius: 50%; opacity: .8; }
  .chibi .sweat  { background: var(--bds-stacey); border-radius: 50% 50% 50% 50% / 65% 65% 40% 40%; z-index: 9; box-shadow: 0 0 6px var(--bds-stacey); }
  .chibi .pxglyph { z-index: 10; }

  .bds-top-sprite { position: absolute; width: 28px; height: 34px; z-index: 5; transform-origin: 50% 90%; }
  .bds-top-sprite > i { position: absolute; display: block; }

  @media (prefers-reduced-motion: no-preference) {
    .a-idle    { animation: bds-c-idle 2.6s ease-in-out infinite; }
    .a-bob     { animation: bds-c-bob var(--spd,.5s) ease-in-out infinite; }
    .a-walk .leg.l { animation: bds-c-lega var(--spd,.5s) ease-in-out infinite; }
    .a-walk .leg.r { animation: bds-c-legb var(--spd,.5s) ease-in-out infinite; }
    .a-walk .arm.l { animation: bds-c-arma var(--spd,.5s) ease-in-out infinite; }
    .a-walk .arm.r { animation: bds-c-armb var(--spd,.5s) ease-in-out infinite; }
    .a-crisis  { animation: bds-c-jolt .45s ease-out infinite alternate; }
    .a-rise    { animation: bds-c-rise 3.6s ease-in-out infinite; }
    .a-talkarm .arm.gesture { animation: bds-c-wave .7s ease-in-out infinite alternate; }
    .a-mouth .mouth { animation: bds-c-flap .42s steps(2) infinite; }
    .a-mouth-slow .mouth { animation: bds-c-flap 1.4s steps(2) infinite; }
    .a-wring .arm.l { animation: bds-c-wra .55s ease-in-out infinite alternate; }
    .a-wring .arm.r { animation: bds-c-wrb .55s ease-in-out infinite alternate; }
    .a-type .arm.r { animation: bds-c-tap .3s steps(2) infinite; }
    .a-nod .head, .a-nod .hairpc { animation: bds-c-nod 3s ease-in-out infinite; }
    .a-shiver { animation: bds-c-shiver .22s steps(2) infinite; }
    .a-bounce { animation: bds-c-bounce .6s var(--ease-pop, ease-out) infinite alternate; }
    .a-peek   { animation: bds-c-peek 3.2s steps(1,end) infinite; }
    .a-tear .tearpx { animation: bds-c-tear 1.1s steps(3) infinite; }
    .a-zzz .zpx { animation: bds-c-zzz 2.4s steps(4) infinite; }
    .a-top-idle  { animation: bds-top-idle 1.6s steps(2) infinite; }
    .a-top-walk  { animation: bds-top-walk var(--spd,.5s) ease-in-out infinite; }
    /* articulated floor walk: legs step in opposition, arms counter-swing */
    .a-top-walk .fl-leg-l { animation: bds-fl-stepA var(--spd,.5s) ease-in-out infinite; }
    .a-top-walk .fl-leg-r { animation: bds-fl-stepB var(--spd,.5s) ease-in-out infinite; }
    .a-top-walk .fl-arm-l { animation: bds-fl-swingA var(--spd,.5s) ease-in-out infinite; }
    .a-top-walk .fl-arm-r { animation: bds-fl-swingB var(--spd,.5s) ease-in-out infinite; }
    .a-top-shake { animation: bds-c-shiver .2s steps(2) infinite; }
  }
  @keyframes bds-c-idle { 0%,100%{ transform: translateY(0) rotate(0); } 50%{ transform: translateY(-1px) rotate(-1.5deg); } }
  @keyframes bds-c-bob  { 50% { transform: translateY(-3px); } }
  @keyframes bds-c-lega { 50% { transform: translateY(-5px) rotate(8deg); } }
  @keyframes bds-c-legb { 50% { transform: translateY(0) rotate(-8deg); } }
  @keyframes bds-c-arma { 50% { transform: rotate(18deg); } }
  @keyframes bds-c-armb { 50% { transform: rotate(-18deg); } }
  @keyframes bds-c-jolt { from { transform: translateY(2px) rotate(1.5deg);} to { transform: translateY(-4px) rotate(-1.5deg);} }
  @keyframes bds-c-rise { 0%,28%{ transform: translateY(12px);} 72%,100%{ transform: translateY(0);} }
  @keyframes bds-c-wave { from{ transform: rotate(-12deg);} to{ transform: rotate(-58deg);} }
  @keyframes bds-c-flap { 50% { transform: scaleY(.4); } }
  @keyframes bds-c-wra { from{ transform: rotate(14deg);} to{ transform: rotate(30deg) translateY(-2px);} }
  @keyframes bds-c-wrb { from{ transform: rotate(-14deg);} to{ transform: rotate(-30deg) translateY(-2px);} }
  @keyframes bds-c-tap { 50% { transform: translateY(-3px); } }
  @keyframes bds-c-nod { 0%,40%,100%{ transform: translateY(0);} 50%,58%{ transform: translateY(2px);} }
  @keyframes bds-c-shiver { 50% { transform: translateX(2px); } }
  @keyframes bds-c-bounce { to { transform: translateY(-5px); } }
  @keyframes bds-c-peek { 0%,60%,100% { transform: translateX(0); } 70%,90% { transform: translateX(7px); } }
  @keyframes bds-c-tear { 0%{ transform: translateY(0); opacity:1;} 100%{ transform: translateY(14px); opacity:0;} }
  @keyframes bds-c-zzz { 0%{ transform: translate(0,0); opacity:0;} 25%{ opacity:1;} 100%{ transform: translate(8px,-16px); opacity:0;} }
  @keyframes bds-top-idle { 50% { transform: translateY(-2px); } }
  @keyframes bds-top-walk { 0%,100%{transform:translateY(0);} 25%,75%{transform:translateY(-2px);} 50%{transform:translateY(0);} }
  @keyframes bds-fl-stepA { 0%,100%{transform:translateY(0);} 50%{transform:translateY(-3.5px);} }
  @keyframes bds-fl-stepB { 0%,100%{transform:translateY(-3.5px);} 50%{transform:translateY(0);} }
  @keyframes bds-fl-swingA { 0%,100%{transform:translateY(-1.5px);} 50%{transform:translateY(1px);} }
  @keyframes bds-fl-swingB { 0%,100%{transform:translateY(1px);} 50%{transform:translateY(-1.5px);} }
  `;
  const styleEl = document.createElement("style");
  styleEl.textContent = css;
  document.head.appendChild(styleEl);

  /* ---------- character registry (lowercase keys) ---------- */
  const CHARS = {
    player: { key:"PLAYER", color:"--bds-white",  u:132, wf:1.00, bw:14, bh:22, hd:10, walk:".5s",
      face:{ hair:"#5d5b86", style:"short", eyes:"dot",    brows:null,      mouth:"neutral", glasses:false, woman:false } },
    brad:   { key:"BRAD",   color:"--bds-brad",   u:134, wf:1.16, bw:18, bh:22, hd:11, walk:".34s",
      face:{ hair:"#7a4626", style:"messy", eyes:"big",    brows:"worried", mouth:"worried", glasses:false, woman:false, sweat:true } },
    stacey: { key:"STACEY", color:"--bds-stacey", u:118, wf:0.90, bw:12, bh:20, hd:9,  walk:".42s",
      face:{ hair:"#9a5a32", style:"long",  eyes:"round",  brows:null,      mouth:"smile",   glasses:false, woman:true } },
    kevin:  { key:"KEVIN",  color:"--bds-kevin",  u:132, wf:1.00, bw:14, bh:22, hd:12, walk:".5s", roundHead:true,
      face:{ hair:"#33324a", style:"neat",  eyes:"round",  brows:"stern",   mouth:"smirk",   glasses:true,  woman:false } },
    janet:  { key:"JANET",  color:"--bds-janet",  u:138, wf:1.00, bw:14, bh:23, hd:10, walk:".46s",
      face:{ hair:"#241a30", style:"long",  eyes:"round",  brows:null,      mouth:"smile",   glasses:false, woman:true, streak:"var(--bds-neon-magenta)" } },
    derek:  { key:"DEREK",  color:"--bds-derek",  u:148, wf:1.18, bw:18, bh:24, hd:11, walk:"1.1s",
      face:{ hair:"#6f6a52", style:"bald",  eyes:"sleepy", brows:"flat",    mouth:"flat",    glasses:false, woman:false } },
    /* generic grey-suit board member; pass face overrides via opts */
    board:  { key:"BOARD",  color:"--bds-grey",   u:138, wf:1.06, bw:16, bh:23, hd:10, walk:".6s", suit:"#3c3a52",
      face:{ hair:"#4a485e", style:"neat",  eyes:"dot",    brows:"flat",    mouth:"flat",    glasses:false, woman:false } },
    /* Kevin's parent — taller, older */
    parent: { key:"PARENT", color:"--bds-kevin",  u:158, wf:1.04, bw:16, bh:26, hd:11, walk:".7s", suit:"#6b632e",
      face:{ hair:"#c9c4d8", style:"bald",  eyes:"dot",    brows:"flat",    mouth:"smile",   glasses:true,  woman:false } },
  };

  /* ---------- pixel glyphs (box-shadow pixel art) ---------- */
  const GLYPHS = {
    heart: ["·##·##·", "#######", "#######", "·#####·", "··###··", "···#···"],
    star:  ["···#···", "··###··", "#######", "·#####·", "··#·#··", "·#···#·"],
    drop:  ["··#··", "·###·", "#####", "#####", "·###·"],
    z:     ["####", "··#·", "·#··", "####"],
    money: ["·###·", "#·#··", "·###·", "··#·#", "·###·"],
    excl:  ["##", "##", "##", "··", "##"],
    flame: ["··#··", "·##··", "·###·", "#####", "·###·"],
  };

  function pixelGlyph(rows, px, color, glow) {
    if (typeof rows === "string") rows = GLYPHS[rows];
    px = px || 3;
    const shadows = [];
    rows.forEach((row, y) => {
      [...row].forEach((ch, x) => {
        if (ch === "#") shadows.push(`${x * px}px ${y * px}px 0 0 ${color}`);
      });
    });
    const d = document.createElement("i");
    d.className = "pxglyph";
    d.style.cssText = `display:block;position:relative;width:${px}px;height:${px}px;` +
      `margin-right:${(rows[0].length - 1) * px}px;margin-bottom:${(rows.length - 1) * px}px;` +
      `background:transparent;box-shadow:${shadows.join(",")};` +
      (glow ? `filter:drop-shadow(0 0 4px ${color});` : "");
    return d;
  }
  function glyphHTML(name, px, color, extra) {
    const rows = GLYPHS[name];
    const shadows = [];
    rows.forEach((row, y) => [...row].forEach((ch, x) => {
      if (ch === "#") shadows.push(`${x * px}px ${y * px}px 0 0 ${color}`);
    }));
    return `<i class="pxglyph" style="display:block;width:${px}px;height:${px}px;box-shadow:${shadows.join(",")};${extra || ""}"></i>`;
  }

  /* ---------- front-view chibi ----------
     state: idle|down|up|left|right|crisis|talk
     opts: { eyes ('closed'|'happy'|'heart'|'wide'), mouth ('open'|'frown'|'wavy'|
             'smile'|'flat'|'worried'|'neutral'|'smirk'), brows, armPose
             ('out'|'palms'|'point'|'open'|'hips'|'behindhead'|'wring'),
             tears, sweat, zzz, heartAbove, blush, tilt (deg), anim (extra classes),
             suit (torso color override), noBubble, scale } */
  function chibi(who, state, opts) {
    opts = opts || {};
    const c = typeof who === "string" ? CHARS[who] : who;
    const u = c.u, wf = c.wf;
    const col = opts.suit || c.suit ? `${opts.suit || c.suit}` : `var(${c.color})`;
    const skin = "var(--bds-white)";
    const pants = "#241a44";
    const F = Object.assign({}, c.face, opts.face || {});
    const headD = Math.round((c.roundHead ? 0.50 : 0.46) * u);
    const torsoW = Math.round(0.40 * u * wf);
    const torsoH = Math.round(0.30 * u);
    const armW = Math.round(0.13 * u), armH = Math.round(0.26 * u);
    const legW = Math.round(0.16 * u), legH = Math.round(0.17 * u), legGap = Math.round(0.05 * u);
    const handD = Math.round(0.13 * u);

    const torsoBottomY = Math.round(legH * 0.45);
    const torsoTopY = torsoBottomY + torsoH;
    const headBottomY = torsoTopY - Math.round(headD * 0.22);
    const headTopY = headBottomY + headD;
    const H = headTopY + Math.round(0.06 * u);
    const W = Math.round(Math.max(headD, torsoW + armW * 1.4) + Math.round(0.18 * u));
    const cx = W / 2;
    const headLeft = cx - headD / 2;

    const isBack = state === "up";
    const side = (state === "left" || state === "right") ? state : null;

    const px = (fx) => headLeft + headD * fx;
    const py = (fy) => headBottomY + headD * (1 - fy);

    const el = document.createElement("div");
    el.className = "chibi";
    el.style.width = W + "px"; el.style.height = H + "px";
    if (opts.scale) { el.style.transform = `scale(${opts.scale})`; }
    if (opts.tilt) { el.style.transform = (el.style.transform || "") + ` rotate(${opts.tilt}deg)`; }
    let html = "";

    /* long hair back panels */
    if (F.style === "long") {
      const hw = Math.round(headD * 0.26), hh = (headTopY - torsoBottomY) - Math.round(0.02 * u);
      const hbot = torsoBottomY + Math.round(0.02 * u);
      const z = isBack ? 7 : 3;
      html += `<div class="hairpc" style="width:${hw}px;height:${hh}px;left:${headLeft - Math.round(0.01*u)}px;bottom:${hbot}px;background:${F.hair};border-radius:60% 40% 45% 55%;z-index:${z};"></div>`;
      html += `<div class="hairpc" style="width:${hw}px;height:${hh}px;left:${headLeft + headD - hw + Math.round(0.01*u)}px;bottom:${hbot}px;background:${F.hair};border-radius:40% 60% 55% 45%;z-index:${z};"></div>`;
      if (F.streak) html += `<div class="hairpc" style="width:${Math.round(hw*0.4)}px;height:${Math.round(hh*0.8)}px;left:${headLeft + headD - hw + Math.round(0.01*u)}px;bottom:${hbot}px;background:${F.streak};border:none;border-radius:40% 60% 55% 45%;z-index:${z+1};"></div>`;
    }

    /* legs */
    html += `<div class="part leg l" style="width:${legW}px;height:${legH}px;left:${cx - legGap/2 - legW}px;bottom:0;background:${pants};"></div>`;
    html += `<div class="part leg r" style="width:${legW}px;height:${legH}px;left:${cx + legGap/2}px;bottom:0;background:${pants};"></div>`;

    /* arms */
    const armBottom = torsoBottomY + Math.round(0.03 * u);
    const pose = opts.armPose;
    function armPair(rotL, rotR, raiseL, raiseR) {
      const lx = cx - torsoW/2 - armW + Math.round(0.03*u);
      const rx = cx + torsoW/2 - Math.round(0.03*u);
      /* hand nests INSIDE the arm so it inherits the arm's rotation —
         a sibling hand with a linear offset drifts off-body at high rotations */
      const hand = `<div class="part hand" style="width:${handD}px;height:${handD}px;left:50%;margin-left:${-Math.round(handD/2) - 3}px;bottom:${-Math.round(handD * 0.4)}px;background:${skin};"></div>`;
      html += `<div class="part arm l" style="width:${armW}px;height:${armH}px;left:${lx}px;bottom:${armBottom + (raiseL||0)}px;background:${col};transform:rotate(${rotL}deg);">${hand}</div>`;
      html += `<div class="part arm r gesture" style="width:${armW}px;height:${armH}px;left:${rx}px;bottom:${armBottom + (raiseR||0)}px;background:${col};transform:rotate(${rotR}deg);">${hand}</div>`;
    }
    if (side) {
      const fx = side === "right" ? 1 : -1;
      html += `<div class="part arm gesture" style="width:${armW}px;height:${armH}px;left:${cx - armW/2 + fx*Math.round(0.10*u)}px;bottom:${armBottom}px;background:${col};transform:rotate(${fx*22}deg);"></div>`;
    } else if (pose === "out")        armPair(8, -70, 0, Math.round(0.06*u));
    else if (pose === "open")         armPair(46, -46, Math.round(0.04*u), Math.round(0.04*u));
    else if (pose === "palms")        armPair(58, -58, Math.round(0.07*u), Math.round(0.07*u));
    else if (pose === "point")        armPair(6, -88, 0, Math.round(0.10*u));
    else if (pose === "hips")         armPair(-34, 34, 0, 0);
    else if (pose === "behindhead")   armPair(4, -160, 0, Math.round(0.16*u));
    else if (pose === "wring")        armPair(22, -22, 0, 0);
    else if (pose === "crossed") {
      html += `<div class="part arm" style="width:${torsoW*0.92}px;height:${Math.round(armH*0.5)}px;left:${cx - torsoW*0.46}px;bottom:${armBottom + Math.round(0.05*u)}px;background:${col};border-radius:30%;z-index:4;"></div>`;
    }
    else armPair(0, 0, 0, 0);

    /* torso */
    html += `<div class="part torso" style="width:${torsoW}px;height:${torsoH}px;left:${cx - torsoW/2}px;bottom:${torsoBottomY}px;background:${col};"></div>`;
    if (c.suit || opts.suit) { /* tie pixel for suits */
      html += `<div style="width:${Math.round(0.04*u)}px;height:${Math.round(torsoH*0.6)}px;left:${cx - Math.round(0.02*u)}px;bottom:${torsoTopY - Math.round(torsoH*0.62)}px;background:${DARK};z-index:5;"></div>`;
    }
    if (!isBack && !side) {
      const nw = Math.round(headD*0.34), nh = Math.round(0.05*u);
      html += `<div class="collar" style="width:${nw}px;height:${nh}px;left:${cx - nw/2}px;bottom:${torsoTopY - nh - 1}px;background:rgba(0,0,0,.28);border-radius:0 0 60% 60%;"></div>`;
    }

    /* head */
    html += `<div class="part head" style="width:${headD}px;height:${headD}px;left:${headLeft}px;bottom:${headBottomY}px;background:${skin};${isBack ? "filter:brightness(.92);" : ""}"></div>`;

    /* hair cap */
    const cap = (w, h, by, radius) =>
      `<div class="hairpc" style="width:${w}px;height:${h}px;left:${cx - w/2}px;bottom:${by}px;background:${F.hair};border-radius:${radius};"></div>`;
    if (F.style === "bald")      html += cap(Math.round(headD*0.66), Math.round(headD*0.20), headTopY - Math.round(headD*0.22), "50% 50% 14% 14%");
    else if (F.style === "messy")html += cap(Math.round(headD*0.94), Math.round(headD*0.46), headTopY - Math.round(headD*0.42), "60% 50% 35% 30% / 70% 65% 30% 30%");
    else if (F.style === "neat") html += cap(Math.round(headD*0.92), Math.round(headD*0.40), headTopY - Math.round(headD*0.36), "55% 55% 20% 40%");
    else if (F.style === "long") html += cap(Math.round(headD*0.98), Math.round(headD*0.46), headTopY - Math.round(headD*0.40), "55% 55% 40% 40%");
    else                         html += cap(Math.round(headD*0.9),  Math.round(headD*0.40), headTopY - Math.round(headD*0.34), "55% 55% 30% 30%");

    /* face */
    if (!isBack && !opts.hideFace) {
      const eyeBase = Math.max(4, Math.round(0.085 * u));
      let exL = 0.34, exR = 0.66;
      if (side === "right") { exL = 0.50; exR = 0.74; }
      if (side === "left")  { exL = 0.26; exR = 0.50; }
      const eyeY = 0.50;
      const eyeStyle = opts.eyes || F.eyes;

      const drawEye = (fx) => {
        if (eyeStyle === "closed" || eyeStyle === "sleepy") {
          const w = Math.round(eyeBase*1.4), h = Math.max(2, Math.round(eyeBase*0.42));
          return `<div class="eye" style="width:${w}px;height:${h}px;border-radius:40%;left:${px(fx)-w/2}px;bottom:${py(eyeY)-h/2}px;"></div>`;
        }
        if (eyeStyle === "happy") {
          const w = Math.round(eyeBase*1.5), h = Math.round(eyeBase*0.9);
          return `<div class="eye" style="width:${w}px;height:${h}px;background:transparent;border:3px solid ${DARK};border-bottom:none;border-radius:80% 80% 0 0;left:${px(fx)-w/2}px;bottom:${py(eyeY)-h/3}px;"></div>`;
        }
        if (eyeStyle === "heart") {
          return `<div class="eye" style="background:transparent;left:${px(fx)-9}px;bottom:${py(eyeY)-6}px;">${glyphHTML("heart", 3, "var(--bds-neon-magenta)", "filter:drop-shadow(0 0 4px var(--bds-neon-magenta));")}</div>`;
        }
        if (eyeStyle === "wide") {
          const d = Math.round(eyeBase*1.5);
          return `<div class="eye" style="width:${d}px;height:${d}px;background:${skin};border:3px solid ${DARK};left:${px(fx)-d/2}px;bottom:${py(eyeY)-d/2}px;"></div>`;
        }
        const d = eyeStyle === "big" ? Math.round(eyeBase*1.25) : eyeBase;
        return `<div class="eye" style="width:${d}px;height:${d}px;left:${px(fx)-d/2}px;bottom:${py(eyeY)-d/2}px;"></div>`;
      };
      html += drawEye(exL) + drawEye(exR);

      if (F.woman && eyeStyle !== "heart") {
        const lw = Math.max(3, Math.round(eyeBase*0.7)), lh = Math.max(2, Math.round(0.022*u));
        html += `<div class="lash" style="width:${lw}px;height:${lh}px;left:${px(exL)-eyeBase*0.7}px;bottom:${py(eyeY)+eyeBase*0.45}px;transform:rotate(-24deg);border-radius:2px;"></div>`;
        html += `<div class="lash" style="width:${lw}px;height:${lh}px;left:${px(exR)+eyeBase*0.0}px;bottom:${py(eyeY)+eyeBase*0.45}px;transform:rotate(24deg);border-radius:2px;"></div>`;
      }

      const brows = opts.brows !== undefined ? opts.brows : F.brows;
      if (brows) {
        const bw = Math.round(headD*0.16), bh = Math.max(2, Math.round(0.028*u));
        const browY = 0.34;
        let rotL = 0, rotR = 0;
        if (brows === "worried") { rotL = 16; rotR = -16; }
        else if (brows === "stern") { rotL = -15; rotR = 15; }
        html += `<div class="brow" style="width:${bw}px;height:${bh}px;background:${F.hair};left:${px(exL)-bw/2}px;bottom:${py(browY)}px;transform:rotate(${rotL}deg);"></div>`;
        html += `<div class="brow" style="width:${bw}px;height:${bh}px;background:${F.hair};left:${px(exR)-bw/2}px;bottom:${py(browY)}px;transform:rotate(${rotR}deg);"></div>`;
      }

      if (F.glasses) {
        const gd = Math.round(eyeBase*2.0);
        html += `<div class="glasses" style="width:${gd}px;height:${Math.round(gd*0.86)}px;left:${px(exL)-gd/2}px;bottom:${py(eyeY)-gd*0.43}px;"></div>`;
        html += `<div class="glasses" style="width:${gd}px;height:${Math.round(gd*0.86)}px;left:${px(exR)-gd/2}px;bottom:${py(eyeY)-gd*0.43}px;"></div>`;
        html += `<div class="bridge" style="width:${px(exR)-px(exL)-gd}px;height:3px;left:${px(exL)+gd/2}px;bottom:${py(eyeY)}px;"></div>`;
      }

      /* mouth */
      const mcx = px(0.5);
      const mouth = opts.mouth || (state === "talk" ? "open" : F.mouth);
      const my = 0.72;
      if (mouth === "open") {
        const mw = Math.round(headD*0.22), mh = Math.round(headD*0.16);
        html += `<div class="mouth" style="width:${mw}px;height:${mh}px;left:${mcx-mw/2}px;bottom:${py(0.74)-mh/2}px;background:${DARK};border-radius:45%;transform-origin:center;"></div>`;
      } else if (mouth === "smile") {
        const mw = Math.round(headD*0.24), mh = Math.round(headD*0.12);
        html += `<div class="mouth" style="width:${mw}px;height:${mh}px;left:${mcx-mw/2}px;bottom:${py(my)-mh}px;border:3px solid ${DARK};border-top:none;background:transparent;border-radius:0 0 80% 80%;"></div>`;
      } else if (mouth === "frown") {
        const mw = Math.round(headD*0.24), mh = Math.round(headD*0.12);
        html += `<div class="mouth" style="width:${mw}px;height:${mh}px;left:${mcx-mw/2}px;bottom:${py(my)-mh/2}px;border:3px solid ${DARK};border-bottom:none;background:transparent;border-radius:80% 80% 0 0;"></div>`;
      } else if (mouth === "worried") {
        const mw = Math.round(headD*0.16), mh = Math.round(headD*0.13);
        html += `<div class="mouth" style="width:${mw}px;height:${mh}px;left:${mcx-mw/2}px;bottom:${py(my)-mh/2}px;background:${DARK};border-radius:48%;"></div>`;
      } else if (mouth === "smirk") {
        const mw = Math.round(headD*0.22), mh = Math.max(3, Math.round(0.03*u));
        html += `<div class="mouth" style="width:${mw}px;height:${mh}px;left:${mcx-mw/2+Math.round(headD*0.04)}px;bottom:${py(my)}px;background:${DARK};border-radius:3px;transform:rotate(-12deg);"></div>`;
      } else if (mouth === "wavy") {
        const mw = Math.round(headD*0.07);
        for (let i = 0; i < 3; i++) {
          html += `<div class="mouth" style="width:${mw}px;height:3px;left:${mcx-mw*1.5+i*mw}px;bottom:${py(my)+(i%2?2:0)}px;background:${DARK};"></div>`;
        }
      } else if (mouth === "flat") {
        const mw = Math.round(headD*0.22), mh = Math.max(2, Math.round(0.025*u));
        html += `<div class="mouth" style="width:${mw}px;height:${mh}px;left:${mcx-mw/2}px;bottom:${py(my)}px;background:${DARK};border-radius:2px;"></div>`;
      } else {
        const mw = Math.round(headD*0.12), mh = Math.max(2, Math.round(0.025*u));
        html += `<div class="mouth" style="width:${mw}px;height:${mh}px;left:${mcx-mw/2}px;bottom:${py(my)}px;background:${DARK};border-radius:2px;"></div>`;
      }

      if (opts.blush) {
        const bd = Math.round(headD*0.14);
        html += `<div class="blush" style="width:${bd}px;height:${Math.round(bd*0.55)}px;left:${px(0.22)}px;bottom:${py(0.66)}px;background:var(--bds-brad);"></div>`;
        html += `<div class="blush" style="width:${bd}px;height:${Math.round(bd*0.55)}px;left:${px(0.70)}px;bottom:${py(0.66)}px;background:var(--bds-brad);"></div>`;
      }
      if (opts.sweat || (F.sweat && (state === "crisis"))) {
        const sw = Math.round(0.05*u), sh = Math.round(0.07*u);
        html += `<div class="sweat" style="width:${sw}px;height:${sh}px;left:${px(0.84)}px;bottom:${py(0.30)}px;"></div>`;
      }
      if (opts.tears) {
        html += `<div class="tearpx" style="position:absolute;left:${px(0.30)}px;bottom:${py(0.62)}px;z-index:9;">${glyphHTML("drop", 2, "var(--bds-derek)", "filter:drop-shadow(0 0 3px var(--bds-derek));")}</div>`;
        html += `<div class="tearpx" style="position:absolute;left:${px(0.66)}px;bottom:${py(0.64)}px;z-index:9;">${glyphHTML("drop", 2, "var(--bds-derek)", "filter:drop-shadow(0 0 3px var(--bds-derek));")}</div>`;
      }
    }

    /* above-head extras */
    if (opts.heartAbove) {
      html += `<div style="position:absolute;left:${cx + Math.round(headD*0.18)}px;bottom:${headTopY + 6}px;z-index:10;">${glyphHTML("heart", 3, "var(--bds-neon-magenta)", "filter:drop-shadow(0 0 5px var(--bds-neon-magenta));")}</div>`;
    }
    if (opts.zzz) {
      for (let i = 0; i < 3; i++) {
        html += `<div class="zpx" style="position:absolute;left:${cx + Math.round(headD*0.34) + i*10}px;bottom:${headTopY - 6 + i*9}px;z-index:10;animation-delay:${i*0.8}s;">${glyphHTML("z", 2, "var(--bds-grey)", "")}</div>`;
      }
    }
    if (opts.sweatDropAbove) {
      html += `<div style="position:absolute;left:${px(0.86)}px;bottom:${headTopY - 4}px;z-index:10;">${glyphHTML("drop", 3, "var(--bds-stacey)", "filter:drop-shadow(0 0 4px var(--bds-stacey));")}</div>`;
    }
    if (state === "crisis" && !opts.noBubble) {
      html += `<div style="position:absolute;left:${cx + Math.round(headD*0.20)}px;bottom:${headTopY - 2}px;z-index:10;width:28px;height:28px;border-radius:8px;background:var(--bds-white);border:3px solid ${DARK};display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:13px;color:var(--bds-danger);box-shadow:0 0 12px rgba(255,90,60,.6);">!</div>`;
    }

    el.innerHTML = html;

    /* animation classes */
    if (opts.anim) opts.anim.split(" ").forEach(cl => cl && el.classList.add(cl));
    else if (state === "idle") {
      if (c.key === "DEREK") { /* still */ }
      else el.classList.add("a-idle");
    } else if (["down","up","left","right"].includes(state)) {
      el.classList.add("a-walk","a-bob");
      el.style.setProperty("--spd", c.walk);
    } else if (state === "crisis") {
      el.classList.add(c.key === "DEREK" ? "a-rise" : "a-crisis");
    } else if (state === "talk") {
      el.classList.add("a-mouth");
    }
    return el;
  }

  /* ---------- compact naturalistic 3/4 person (28x34 box) ----------
     Shared body for floor sprites. Front-facing (or back when facing up),
     skin + hair + office shirt — matches the warmlight Office Floor cast.
     opts: { skin, hair, shirt, pants, back, style, glasses, streak, sweat,
             eyes ('sleepy'|'big'|...), mouth ('smile'|'smirk'|'worried'|...) } */
  function personHTML(o, ink) {
    const skin = o.skin || "#f0c8a4", hair = o.hair || "#3a2a18",
          shirt = o.shirt || "var(--bds-white)", pants = o.pants || "#2c2b3a",
          style = o.style || "short", back = o.back;
    const R = (x, y, w, h, bg, ex) => `<i style="left:${x}px;top:${y}px;width:${w}px;height:${h}px;background:${bg};${ex || ""}"></i>`;
    const RC = (cls, x, y, w, h, bg, ex) => `<i class="${cls}" style="left:${x}px;top:${y}px;width:${w}px;height:${h}px;background:${bg};${ex || ""}"></i>`;
    const O = `box-shadow:0 0 0 2px ${ink};`;
    let h = "";
    // legs + shoes — each leg shares its class with its shoe so they step as one
    h += RC("fl-leg-l", 7, 25, 5, 8, pants, O) + RC("fl-leg-r", 14, 25, 5, 8, pants, O);
    h += RC("fl-leg-l", 6, 31, 7, 3, "#26242f") + RC("fl-leg-r", 13, 31, 7, 3, "#26242f");
    // arms + hands — each arm shares its class with its hand so they swing as one
    h += RC("fl-arm-l", 0, 14, 4, 10, shirt, O) + RC("fl-arm-r", 22, 14, 4, 10, shirt, O);
    h += RC("fl-arm-l", 0, 22, 4, 3, skin) + RC("fl-arm-r", 22, 22, 4, 3, skin);
    // torso
    h += R(4, 13, 18, 14, shirt, O + "border-radius:5px 5px 2px 2px;");
    if (o.tie && !back) h += R(12, 14, 3, 10, o.tie);
    h += R(11, 11, 4, 4, skin); // neck
    // head
    h += R(5, 0, 16, 14, skin, O + "border-radius:46% 46% 44% 44%;z-index:2;");
    // hair
    if (style === "bald") h += R(7, -1, 12, 5, hair, O + "border-radius:50% 50% 12% 12%;z-index:3;");
    else if (style === "long") {
      h += R(3, 1, 4, 15, hair, O + "border-radius:50% 20% 30% 60%;z-index:1;") + R(19, 1, 4, 15, hair, O + "border-radius:20% 50% 60% 30%;z-index:1;");
      h += R(4, -2, 18, 8, hair, O + "border-radius:55% 55% 30% 30%;z-index:3;");
      if (o.streak) h += R(18, 0, 4, 12, o.streak, "z-index:4;border-radius:30% 50% 60% 30%;");
    } else if (style === "messy") h += R(3, -3, 20, 9, hair, O + "border-radius:60% 50% 40% 40% / 70% 65% 30% 30%;z-index:3;");
    else h += R(4, -2, 18, 8, hair, O + "border-radius:55% 55% 25% 35%;z-index:3;");
    if (back) {
      // back of head — fill hair lower, no face
      h += R(5, 2, 16, 10, hair, "z-index:3;border-radius:40% 40% 46% 46%;");
    } else {
      // eyes — sleepy reads as half-closed lines, big for the anxious ones
      if (o.eyes === "sleepy") {
        h += R(9, 7, 3, 1, ink, "z-index:4;border-radius:1px;") + R(14, 7, 3, 1, ink, "z-index:4;border-radius:1px;");
      } else {
        const eh = o.eyes === "big" ? 4 : 3;
        h += R(9, 5, 2, eh, ink, "z-index:4;border-radius:1px;") + R(15, 5, 2, eh, ink, "z-index:4;border-radius:1px;");
      }
      if (o.glasses) {
        h += R(7, 4, 5, 5, "transparent", "z-index:5;border:2px solid " + ink + ";border-radius:2px;") + R(14, 4, 5, 5, "transparent", "z-index:5;border:2px solid " + ink + ";border-radius:2px;") + R(12, 6, 2, 2, ink, "z-index:5;");
      }
      // mouth — a few legible expressions that still read at 16px
      const mth = o.mouth;
      if (mth === "smile") h += R(10, 10, 6, 3, "transparent", "z-index:4;border:2px solid rgba(120,40,30,.6);border-top:none;border-radius:0 0 70% 70%;");
      else if (mth === "smirk") h += R(11, 10, 5, 2, "rgba(120,40,30,.6)", "z-index:4;border-radius:2px;transform:rotate(-13deg);");
      else if (mth === "worried") h += R(11, 9, 3, 3, "rgba(120,40,30,.55)", "z-index:4;border-radius:50%;");
      else h += R(11, 10, 4, 2, "rgba(120,40,30,.5)", "z-index:4;border-radius:2px;");
      if (o.sweat) h += R(18, 3, 3, 4, "#7fc6e8", "z-index:6;border-radius:60% 60% 50% 50%;box-shadow:0 0 4px #7fc6e8;");
    }
    return h;
  }

  /* ---------- top-down floor sprite (warmlight 3/4 person) ----------
     Back-compatible API. `color` becomes the shirt; identity is kept via
     the shirt + hair. opts: { color, hair, skin, pose, dim, facing, scale,
     still, glasses, streak, style, sweat } */
  function topSprite(opts) {
    opts = opts || {};
    // pass who:'brad' to inherit that character's colour + face traits; explicit
    // color/hair/style/etc. still override (back-compatible).
    const c = opts.who && CHARS[opts.who] ? CHARS[opts.who] : null;
    const f = c ? c.face : {};
    const el = document.createElement("div");
    el.className = "bds-top-sprite";
    el.style.width = "26px"; el.style.height = "34px";
    const anims = { idle: "a-top-idle", walk: "a-top-walk", shake: "a-top-shake" };
    const pose = opts.pose;
    if (!opts.still && anims[pose]) el.classList.add(anims[pose]);
    else if (!opts.still && (pose == null || pose === "idle")) el.classList.add("a-top-idle");
    // per-character walk cadence (brad frantic, derek plodding)
    el.style.setProperty("--spd", opts.walk || (c && c.walk) || ".5s");
    let tf = "";
    if (pose === "lean") tf = "rotate(-8deg)";
    else if (pose === "slump") tf = "rotate(6deg) translateY(3px)";
    if (opts.scale) tf += ` scale(${opts.scale})`;
    if (tf) { el.style.transform = tf; el.style.transformOrigin = "50% 100%"; }
    if (opts.dim) el.style.filter = "brightness(.6) saturate(.7)";
    el.innerHTML = personHTML({
      skin: opts.skin,
      hair: opts.hair || f.hair,
      shirt: opts.color || (c ? `var(${c.color})` : "var(--bds-white)"),
      pants: opts.pants, back: opts.facing === "up",
      style: opts.style || f.style,
      glasses: opts.glasses != null ? opts.glasses : f.glasses,
      streak: opts.streak || f.streak,
      eyes: opts.eyes || f.eyes,
      mouth: opts.mouth || f.mouth,
      sweat: opts.sweat,   // sweat is a transient state, not identity — stays explicit
      tie: opts.tie,
    }, "var(--bds-void)");
    return el;
  }

  /* top-down desk with monitor */
  function desk(opts) {
    opts = opts || {};
    const el = document.createElement("div");
    el.style.cssText = "position:absolute;width:46px;height:22px;left:-23px;top:14px;background:#5a4326;border:2px solid #3a2b16;z-index:4;box-shadow:inset 0 3px 0 #6e542f, inset 0 -3px 0 #3f2f19;";
    const mon = document.createElement("div");
    mon.style.cssText = `position:absolute;left:50%;top:-9px;transform:translateX(-50%);width:18px;height:12px;background:${opts.dark ? "#0a0c14" : "#10131f"};border:2px solid #2a2f44;${opts.dark ? "" : "box-shadow:0 0 6px rgba(80,140,255,.35);"}`;
    el.appendChild(mon);
    return el;
  }

  /* name tag under a floor sprite */
  function tag(text, color, opts) {
    opts = opts || {};
    const el = document.createElement("div");
    el.style.cssText = `position:absolute;left:50%;top:${opts.top != null ? opts.top : 34}px;transform:translateX(-50%);font-family:var(--font-display);font-size:6px;letter-spacing:1px;color:${color};text-shadow:${opts.glow === false ? "1px 1px 0 var(--bds-void)" : `1px 1px 0 var(--bds-void), 0 0 6px ${color}`};white-space:nowrap;z-index:5;`;
    el.textContent = text;
    return el;
  }

  /* zero-size anchored station */
  function station(x, y) {
    const el = document.createElement("div");
    el.style.cssText = `position:absolute;left:${x}px;top:${y}px;width:0;height:0;z-index:5;`;
    for (let i = 2; i < arguments.length; i++) if (arguments[i]) el.appendChild(arguments[i]);
    return el;
  }

  window.BDSChibi = { CHARS, chibi, topSprite, personHTML, desk, tag, station, pixelGlyph, glyphHTML, GLYPHS };
})();