/* ===== ترازوی خوارزمی — استایل ===== */
:root{
  /* --- رنگ‌های برند Playva --- */
  --playva-orange:#fa4600;
  --playva-flame:#f86800;
  --playva-amber:#ffa320;
  --playva-silver:#eef1f5;
  --playva-grad:linear-gradient(135deg,var(--playva-amber),var(--playva-orange));

  /* --- پوسته: شب لاجوردی بیت‌الحکمه --- */
  --bg:#0f0f22;
  --bg-deep:#05050d;
  --glow:#262a5c;
  --glow2:#3a2410;
  --panel:#1b1c38;
  --panel2:#10112a;
  --line:#2f3260;
  --line-hi:#4b4f8e;
  --txt:#f2f1fa;
  --muted:#b0b1d4;
  --ink:#1e0f06;

  --chrome-grad:linear-gradient(180deg,#1c1d3a,#10112a);
  --card-grad:linear-gradient(180deg,#20224a,#0b0c22);
  --shade:rgba(5,5,13,.9);
  --shade-soft:rgba(27,28,56,.55);
  --toast-bg:rgba(27,28,56,.96);

  /* --- ترازو: برنج و آهن --- */
  --brass1:#f2cf7a;
  --brass2:#a8752a;
  --brass-edge:#5c3b10;
  --pan-shadow:rgba(0,0,0,.4);
  --chain:#c79a4a;
  --iron1:#8d939e;
  --iron2:#3f444d;
  --iron-edge:#24272d;
  --iron-txt:#f4f1e6;
  --sack1:#d8b27a;
  --sack2:#8f6534;
  --sack-edge:#4d3215;
  --sack-txt:#3d250c;
  --balloon1:#ff8a7a;
  --balloon2:#c22a2a;
  --balloon-txt:#fff4ee;
  --ghost1:#bfe6ff;
  --ghost2:#5f9fd0;
  --ghost-edge:#2a5a86;
  --ghost-txt:#0f2a44;
  --string:#d9d5c8;
  --pop:#ffd36a;
  --hint:#5fe0a0;

  --good:#5fc987;
  --bad:#ff5b52;
  --star:#ffc53d;
  --star-off:#3b3e6a;

  --btn-h:50px;
  --radius:16px;
  --radius-sm:11px;
  --gap:8px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --ring:0 0 0 2px rgba(250,70,0,.55);
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none !important}
html,body{height:100%;overscroll-behavior:none}
body{
  margin:0;
  font-family:'Vazirmatn',Tahoma,'Segoe UI',system-ui,sans-serif;
  background:
    radial-gradient(1100px 640px at 50% -14%, var(--glow) 0%, transparent 62%),
    radial-gradient(700px 500px at 100% 110%, var(--glow2) 0%, transparent 60%),
    linear-gradient(180deg,var(--bg) 0%, var(--bg-deep) 100%);
  color:var(--txt);
  touch-action:manipulation;
  user-select:none;
  -webkit-user-select:none;
}
.app{
  height:100dvh;
  display:flex;
  flex-direction:column;
  gap:var(--gap);
  padding:calc(env(safe-area-inset-top) + 8px) 10px calc(env(safe-area-inset-bottom) + 8px);
  max-width:680px;
  margin:0 auto;
  width:100%;
}

/* ---------- نوار بالا ---------- */
.topbar{
  display:flex;align-items:center;gap:10px;
  background:var(--chrome-grad);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:7px 11px;
  flex:0 0 auto;
  overflow:hidden;
}
.brand{display:flex;align-items:center;gap:7px;min-width:0;flex:1 1 auto}
.brand__mark{width:26px;height:26px;flex:0 0 auto;filter:drop-shadow(0 2px 6px rgba(250,70,0,.45))}
.pv-swoosh{fill:none;stroke:var(--playva-orange);stroke-width:3.2;stroke-linecap:round;opacity:.8}
.pv-swoosh--2{opacity:.5}
.brand__word{font-weight:800;font-size:.95rem;letter-spacing:.2px;color:var(--playva-silver);direction:ltr}
.brand__word em{font-style:normal;color:var(--playva-orange)}
.brand__sep{width:1px;height:18px;background:var(--line);flex:0 0 auto}
.brand__game{font-weight:800;font-size:.92rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.icon-btn{
  flex:0 0 auto;
  width:34px;height:34px;
  display:grid;place-items:center;
  background:var(--panel2);color:var(--txt);
  border:1px solid var(--line);border-radius:11px;
  font-size:1rem;cursor:pointer;
  transition:.18s;
}
.icon-btn:hover{border-color:var(--playva-orange)}
.icon-btn:active{transform:scale(.94)}
.icon-btn.off{opacity:.45}
.icon-btn:focus-visible{outline:none;box-shadow:var(--ring)}

/* ---------- نوار وضعیت ---------- */
.hud{flex:0 0 auto;display:flex;gap:8px}
.stat{
  flex:1 1 0;min-width:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:50px;
  background:var(--chrome-grad);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:3px 6px;
}
.stat span{font-size:.68rem;color:var(--muted)}
.stat b{font-size:.98rem;white-space:nowrap;color:var(--playva-amber)}
.stat--eq{flex:2.4 1 0}
.stat--eq b{color:var(--txt);font-size:1.02rem;unicode-bidi:isolate;overflow:hidden;text-overflow:ellipsis;max-width:100%}

/* ---------- صحنه و ترازو ---------- */
.stage{position:relative;flex:1 1 auto;min-height:0;display:flex}
.scene-wrap{flex:1 1 auto;min-height:0;min-width:0;display:flex}
.scene{width:100%;height:100%;display:block;touch-action:manipulation;overflow:visible}
.base{fill:url(#gBrass);stroke:var(--brass-edge);stroke-width:1.2}
.pillar{fill:url(#gBrass);stroke:var(--brass-edge);stroke-width:1}
.knob{fill:var(--brass1);stroke:var(--brass-edge);stroke-width:1.2}
.beam{fill:url(#gBrass);stroke:var(--brass-edge);stroke-width:1.2}
.tongue{fill:var(--brass1);stroke:var(--brass-edge);stroke-width:1}
.tongue-mark{fill:var(--line-hi)}
.cap-txt{font-family:inherit;font-size:10px;font-weight:800;fill:var(--muted);text-anchor:middle}
.chain{stroke:var(--chain);stroke-width:1.4;stroke-dasharray:3 2;fill:none}
.pan{fill:url(#gBrass);stroke:var(--brass-edge);stroke-width:1.2;filter:drop-shadow(0 4px 4px var(--pan-shadow))}
.pan-rim{stroke:var(--brass1);stroke-width:2.2;stroke-linecap:round}

.item{cursor:pointer}
.item .hit{fill:transparent}
.sack{fill:url(#gSack);stroke:var(--sack-edge);stroke-width:1.2}
.tie{fill:none;stroke:var(--sack-edge);stroke-width:2;stroke-linecap:round}
.weight{fill:url(#gWeight);stroke:var(--iron-edge);stroke-width:1}
.balloon{fill:url(#gBalloon);stroke:var(--balloon2);stroke-width:.8}
.ghost{fill:url(#gGhost);stroke:var(--ghost-edge);stroke-width:1.2;stroke-dasharray:3 2}
.string{fill:none;stroke:var(--string);stroke-width:1}
.lbl{font-family:'Vazirmatn',Tahoma,'Segoe UI',system-ui,sans-serif;font-weight:800;text-anchor:middle;dominant-baseline:central;pointer-events:none}
.lbl--sack{font-size:13px;fill:var(--sack-txt)}
.lbl--w{font-size:10px;fill:var(--iron-txt)}
.lbl--b{font-size:9.5px;fill:var(--balloon-txt)}
.lbl--g{font-size:10px;fill:var(--ghost-txt)}
.item:hover .sack,.item:hover .weight,.item:hover .balloon,.item:hover .ghost{filter:brightness(1.15)}
.item.hinted{animation:glow 1s ease-in-out infinite}
.item.hinted .sack,.item.hinted .weight,.item.hinted .balloon,.item.hinted .ghost{stroke:var(--hint);stroke-width:2.4;stroke-dasharray:none}
@keyframes glow{50%{opacity:.55}}
.item--b,.item--g{animation:bob 2.6s ease-in-out infinite}
.item--b.hinted,.item--g.hinted{animation:glow 1s ease-in-out infinite}
@keyframes bob{50%{translate:0 -2px}}
.pop{font-family:'Vazirmatn',Tahoma,'Segoe UI',system-ui,sans-serif;font-size:15px;font-weight:800;fill:var(--pop);text-anchor:middle;animation:rise .7s ease-out both;pointer-events:none}
@keyframes rise{from{opacity:1;translate:0 0}to{opacity:0;translate:0 -18px}}

/* ---------- نوار تقسیم ---------- */
.divbar{
  position:absolute;inset-inline:8px;bottom:8px;z-index:5;
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  background:var(--toast-bg);
  border:1px solid var(--line-hi);
  border-radius:var(--radius);
  padding:8px 10px;
  box-shadow:var(--shadow);
  font-size:.82rem;color:var(--muted);
  animation:pop .2s ease both;
}
.divbar__opts{display:flex;gap:6px;flex:1 1 auto;flex-wrap:wrap}
.divopt{
  min-width:52px;height:42px;
  background:var(--playva-grad);color:var(--ink);
  border:0;border-radius:var(--radius-sm);
  font-family:inherit;font-size:1rem;font-weight:800;cursor:pointer;
}
.divopt.hinted{box-shadow:0 0 0 3px var(--hint)}
.divopt:focus-visible{outline:none;box-shadow:var(--ring)}
.divbar__x{
  width:34px;height:34px;flex:0 0 auto;
  background:transparent;color:var(--muted);
  border:1px solid var(--line);border-radius:10px;cursor:pointer;font-size:.9rem;
}

.status{
  flex:0 0 auto;margin:0;
  min-height:2.9em;
  text-align:center;
  color:var(--muted);font-size:.84rem;font-weight:600;line-height:1.7;
}

/* ---------- دکمه‌های زیر صحنه ---------- */
.dock{flex:0 0 auto;display:flex;gap:8px}
.tool{
  flex:1 1 0;min-width:0;
  height:var(--btn-h);
  display:flex;align-items:center;justify-content:center;gap:6px;
  background:var(--chrome-grad);color:var(--txt);
  border:1px solid var(--line);border-radius:var(--radius);
  font-family:inherit;font-size:.88rem;font-weight:800;
  cursor:pointer;
  transition:border-color .15s, opacity .15s, transform .1s;
}
.tool__big{font-size:1.15rem;line-height:1}
.tool:active{transform:scale(.97)}
.tool:disabled{opacity:.35;cursor:default;transform:none}
.tool:focus-visible{outline:none;box-shadow:var(--ring)}

/* ---------- صفحه‌های روی دار ---------- */
.screen{
  position:absolute;inset:0;
  display:flex;
  padding:14px;
  background:radial-gradient(600px 400px at 50% 40%, var(--shade-soft), var(--shade));
  z-index:6;
  overflow:auto;
  touch-action:pan-y;
  border-radius:var(--radius);
  scrollbar-width:thin;scrollbar-color:var(--line) transparent;
}
.card{
  margin:auto;
  width:min(100%,370px);
  background:var(--card-grad);
  border:1px solid var(--line);
  border-radius:20px;
  padding:18px 16px;
  text-align:center;
  box-shadow:var(--shadow);
  animation:pop .28s cubic-bezier(.2,1.2,.4,1) both;
}
.card--wide{width:min(100%,430px)}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.96)}to{opacity:1;transform:none}}
.card__emoji{font-size:2.2rem;line-height:1;margin-bottom:4px;filter:drop-shadow(0 6px 14px rgba(0,0,0,.5))}
.card h2{margin:0 0 6px;font-size:1.25rem}
.card p{margin:0 0 12px;color:var(--muted);font-size:.84rem;line-height:1.75}
.result{
  background:var(--panel2);border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:6px 12px;margin-bottom:12px;
}
.result__row{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:4px 0;font-size:.84rem;
}
.result__row span{color:var(--muted);text-align:start}
.result__row b{color:var(--playva-amber);font-size:.98rem;white-space:nowrap}

/* ---------- فهرست معماها ---------- */
.levels{text-align:start;margin-bottom:10px}
.levels h3{margin:8px 0 6px;font-size:.8rem;color:var(--playva-amber)}
.levels__grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.lv{
  height:50px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  background:var(--panel2);color:var(--txt);
  border:1px solid var(--line);border-radius:var(--radius-sm);
  font-family:inherit;cursor:pointer;transition:.15s;
}
.lv b{font-size:.95rem;line-height:1.1}
.lv i{font-style:normal;font-size:.62rem;color:var(--star);letter-spacing:-1px;line-height:1}
.lv i s{text-decoration:none;color:var(--star-off)}
.lv.done{border-color:var(--line-hi)}
.lv.cur{border-color:var(--playva-orange);box-shadow:0 0 12px rgba(250,70,0,.3)}
.lv:disabled{opacity:.4;cursor:default}
.lv:disabled i{color:var(--muted)}
.lv:focus-visible{outline:none;box-shadow:var(--ring)}
.stars{font-size:2.3rem;letter-spacing:4px;line-height:1.1;margin-bottom:4px}
.stars span{color:var(--star);text-shadow:0 4px 14px rgba(255,197,61,.45)}
.stars s{text-decoration:none;color:var(--star-off)}

/* ---------- دکمه‌ها ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  width:100%;
  padding:11px 16px;
  background:var(--panel);color:var(--txt);
  border:1px solid var(--line);border-radius:var(--radius-sm);
  font-family:inherit;font-size:.9rem;font-weight:600;
  cursor:pointer;transition:.18s;
}
.btn + .btn{margin-block-start:8px}
.btn:hover{border-color:var(--line-hi)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:none;box-shadow:var(--ring)}
.btn.primary{
  background:var(--playva-grad);
  border-color:transparent;color:var(--ink);font-weight:800;
  box-shadow:0 8px 20px rgba(250,70,0,.28);
}
.btn.primary:hover{filter:brightness(1.06)}
.btn.big{padding:12px 16px;font-size:.98rem}
.btn.ghost{background:transparent;color:var(--muted)}
.btn.ghost:hover{color:var(--txt)}

/* ---------- پنجرهٔ تنظیمات ---------- */
.modal{
  position:fixed;inset:0;z-index:20;
  display:grid;place-items:end center;
  background:rgba(3,3,10,.76);
  padding:12px;
}
.sheet{
  width:min(100%,460px);
  max-height:88dvh;overflow:auto;
  background:var(--card-grad);
  border:1px solid var(--line);
  border-radius:20px;
  padding:18px 16px calc(env(safe-area-inset-bottom) + 16px);
  box-shadow:var(--shadow);
  animation:slide .26s cubic-bezier(.2,1,.4,1) both;
}
@keyframes slide{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.sheet h2{margin:0 0 14px;font-size:1.08rem}
.field{margin-bottom:13px}
.field > label{display:block;margin-bottom:6px;color:var(--muted);font-size:.8rem}
.seg{
  display:flex;gap:4px;
  background:var(--panel2);border:1px solid var(--line);
  border-radius:12px;padding:4px;
}
.seg button{
  flex:1;padding:8px 4px;
  background:transparent;color:var(--muted);
  border:0;border-radius:9px;
  font-family:inherit;font-size:.8rem;font-weight:600;
  cursor:pointer;transition:.18s;
}
.seg button.on{background:var(--playva-grad);color:var(--ink);font-weight:800}
.seg button:focus-visible{outline:none;box-shadow:var(--ring)}
.rules{
  background:var(--panel2);border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:12px 14px;margin:16px 0;
}
.rules h3{margin:0 0 8px;font-size:.9rem;color:var(--playva-amber)}
.rules h3 + ul{margin-bottom:12px}
.rules ul{margin:0;padding-inline-start:18px;color:var(--muted);font-size:.8rem;line-height:1.95}
.rules ul.legend{list-style:none;padding-inline-start:0}
.rules ul.legend li{display:flex;align-items:flex-start;gap:8px}
.rules ul.legend svg{width:26px;height:28px;flex:0 0 auto}
.rules b{color:var(--txt);margin-inline-end:3px}
.sheet-actions{display:flex;gap:8px}
.sheet-actions .btn{margin-block-start:0;padding-inline:8px}
.made{margin:14px 0 0;text-align:center;color:var(--muted);font-size:.72rem}

/* ---------- پیام کوتاه — پایین صفحه تا روی معادله نیفتد ---------- */
.toast{
  position:fixed;
  inset-inline:0;
  bottom:calc(env(safe-area-inset-bottom) + 76px);
  margin-inline:auto;
  width:max-content;max-width:88vw;
  z-index:30;
  background:var(--toast-bg);
  border:1px solid var(--line);
  border-radius:999px;
  padding:9px 16px;
  font-size:.84rem;
  text-align:center;
  box-shadow:var(--shadow);
  animation:pop .22s ease both;
  pointer-events:none;
}
.toast.good{border-color:var(--good)}
.toast.bad{border-color:var(--bad)}

/* ---------- صفحه‌های کوتاه ---------- */
@media (max-height:760px){
  .card{padding:14px 12px}
  .card p{font-size:.78rem;line-height:1.6;margin-bottom:8px}
  .lv{height:42px}
  .card__emoji{font-size:1.8rem}
}

/* ---------- صفحه‌های کوچک ---------- */
@media (max-width:430px){
  :root{--gap:6px;--btn-h:48px}
  .topbar{gap:7px;padding:7px 9px}
  .stat b{font-size:.88rem}
  .stat--eq b{font-size:.9rem}
  .tool{font-size:.78rem;gap:4px}
  .levels__grid{gap:5px}
}
@media (max-width:340px){
  .brand__word,.brand__sep{display:none}
  .tool__big{display:none}
}