/* ===== توکن‌های طراحی ===== */
:root{
  --bg:#fff;--text:#3c3c3c;--muted:#777;--line:#e5e5e5;--card:#fff;
  --green:#58cc02;--green-d:#58a700;--blue:#1cb0f6;--blue-d:#1899d6;--purple:#ce82ff;--purple-d:#a568cc;
  --red:#ff4b4b;--red-d:#d33;--orange:#ff9600;--orange-d:#e08600;--gold:#ffc800;--gold-d:#e5a800;
  --red-bg:#ffdfe0;--ok-bg:#d7ffb8;--gray:#e5e5e5;--gray-d:#b7b7b7;
  --side:#f7f7f5;--hover:rgba(55,53,47,.06);--hover2:rgba(55,53,47,.1);--sel:rgba(35,131,226,.12);--pop:#fff;--field:rgba(55,53,47,.04);
  --shadow:0 0 0 1px rgba(15,15,15,.05),0 3px 6px rgba(15,15,15,.1),0 9px 24px rgba(15,15,15,.2);
  --mono:ui-monospace,'Cascadia Code',Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#131f24;--text:#f1f7fb;--muted:#8fa0a8;--line:#37464f;--card:#131f24;--gray:#37464f;--gray-d:#52656d;--red-bg:#3b2226;--ok-bg:#1f3a1a;
  --side:#18272d;--hover:rgba(255,255,255,.055);--hover2:rgba(255,255,255,.09);--sel:rgba(28,176,246,.16);--pop:#1d2e35;--field:rgba(255,255,255,.04);
  --shadow:0 0 0 1px rgba(255,255,255,.08),0 3px 6px rgba(0,0,0,.3),0 9px 24px rgba(0,0,0,.45);color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#131f24;--text:#f1f7fb;--muted:#8fa0a8;--line:#37464f;--card:#131f24;--gray:#37464f;--gray-d:#52656d;--red-bg:#3b2226;--ok-bg:#1f3a1a;
  --side:#18272d;--hover:rgba(255,255,255,.055);--hover2:rgba(255,255,255,.09);--sel:rgba(28,176,246,.16);--pop:#1d2e35;--field:rgba(255,255,255,.04);
  --shadow:0 0 0 1px rgba(255,255,255,.08),0 3px 6px rgba(0,0,0,.3),0 9px 24px rgba(0,0,0,.45);color-scheme:dark}

*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--text);font-family:'Vazirmatn',system-ui,sans-serif;font-weight:700}
button{font:inherit;cursor:pointer;color:inherit;-webkit-tap-highlight-color:transparent}
button:disabled{cursor:default}
button:focus-visible,[role=button]:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.hide{display:none!important}
.stat{display:flex;gap:6px;align-items:center;font-weight:800}
.wrap{max-width:560px;margin:auto;padding:16px}

/* ===== خانه ===== */
.topnav{position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:2px solid var(--line)}
.topnav-in{display:flex;align-items:center;gap:14px;padding-block:10px}
.brand{font-size:18px;font-weight:800;flex:1}
.ghost-btn{border:2px solid var(--line);border-bottom-width:4px;border-radius:12px;background:var(--bg);padding:7px 12px;font-size:14px;font-weight:800;color:var(--blue)}
.ghost-btn:active{border-bottom-width:2px;transform:translateY(2px)}
.unit{color:#fff;border-radius:16px;padding:18px 20px;margin-top:22px}
.unit small{opacity:.9;font-weight:800;font-size:12px}
.unit h2{margin:4px 0 0;font-size:19px;font-weight:800}
.path{display:flex;flex-direction:column;align-items:center;padding:10px 0 6px}
.node-row{position:relative;display:flex;flex-direction:column;align-items:center;margin:16px 0 4px}
.node{width:76px;height:70px;border-radius:50%;border:0;display:grid;place-items:center;font-size:30px;background:var(--gray);box-shadow:0 8px 0 var(--gray-d);color:var(--gray-d)}
.node:not(:disabled):active{transform:translateY(8px);box-shadow:none!important}
.node.done{color:#fff}
.node.cur{color:#fff}
.node:disabled{cursor:not-allowed;font-size:24px}
.node-title{margin-top:14px;font-size:12px;color:var(--muted);max-width:150px;text-align:center;line-height:1.6}
.start{position:absolute;top:-44px;background:var(--card);border:2px solid var(--line);border-radius:12px;padding:4px 14px;color:var(--green);font-weight:800;animation:bob 1.2s ease-in-out infinite;white-space:nowrap;z-index:1}
.start:after{content:"";position:absolute;bottom:-8px;left:50%;width:12px;height:12px;background:var(--card);border:solid var(--line);border-width:0 2px 2px 0;transform:translateX(-50%) rotate(45deg)}
@keyframes bob{50%{margin-top:-6px}}
.home-empty{text-align:center;padding:60px 10px;color:var(--muted)}
.home-empty .big{font-size:64px}

/* ===== اجرای درس ===== */
#lesson{position:fixed;inset:0;background:var(--bg);display:flex;flex-direction:column;z-index:10;padding-top:env(safe-area-inset-top,0px)}
.lhead{display:flex;align-items:center;gap:14px;max-width:760px;width:100%;margin:0 auto;padding:18px 16px}
.x{background:none;border:0;font-size:26px;color:var(--gray-d);font-weight:800}
.x.sm{font-size:18px;opacity:.7}.x.sm:hover{opacity:1}
.bar{flex:1;height:16px;background:var(--gray);border-radius:99px;overflow:hidden}
.fill{height:100%;width:0;background:var(--green);border-radius:99px;transition:width .35s;position:relative}
.fill:after{content:"";position:absolute;inset:4px 8px auto;height:4px;background:rgba(255,255,255,.35);border-radius:9px}
.preview-tag{font-size:12px;color:var(--purple-d);background:rgba(206,130,255,.15);padding:3px 10px;border-radius:99px}
.body{flex:1;overflow:auto;max-width:760px;width:100%;margin:0 auto;padding:12px 20px;display:flex;flex-direction:column}
.foot{border-top:2px solid var(--line);padding:16px 20px calc(16px + env(safe-area-inset-bottom,0px));transition:background .2s}
.foot.ok,.phone-foot.ok{background:var(--ok-bg);border-color:transparent}
.foot.bad,.phone-foot.bad{background:var(--red-bg);border-color:transparent}
.fi{max-width:760px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:16px}
.msg{font-size:19px;font-weight:800}
.foot.ok .msg,.phone-foot.ok .phone-msg{color:var(--green-d)}
.foot.bad .msg,.phone-foot.bad .phone-msg{color:var(--red)}
.msg small,.phone-msg small{display:block;font-size:17px;margin-top:2px;line-height:1.9}
.go{min-width:140px;padding:14px 22px;border:0;border-radius:16px;background:var(--green);color:#fff;box-shadow:0 4px 0 var(--green-d);font-size:16px;font-weight:800}
.go:active{transform:translateY(4px);box-shadow:none}
.go:disabled{background:var(--gray);color:var(--gray-d);box-shadow:none;transform:none;cursor:default}
/* گوشی: دکمه تمام‌عرض، پیام بازخورد بالای آن، بدون خط جداکننده (مثل دوئولینگو) */
@media (max-width:600px){
  .foot{border-top-color:transparent;padding:12px 16px calc(14px + env(safe-area-inset-bottom,0px))}
  .fi{flex-direction:column;align-items:stretch;gap:12px}
  .msg:empty{display:none}
  .go{width:100%;min-width:0;padding:15px 22px;font-size:17px}
}
.foot.bad .go,.phone-foot.bad .go{background:var(--red);box-shadow:0 4px 0 var(--red-d)}
.end{text-align:center;padding-top:50px}
.end .big{font-size:80px}
.end h1{font-size:28px}
.chips{display:flex;gap:12px;justify-content:center;margin-top:20px}
.chip{border:2px solid var(--line);border-radius:14px;padding:10px 18px;min-width:100px}
.chip b{display:block;font-size:22px}

/* ===== محتوای اسلاید (مشترک بین درس و پیش‌نمایش) ===== */
.blk{margin-bottom:16px}
/* چیدمان عمودی اسلاید: بی‌سؤال ← وسط صفحه؛ سؤال‌دار ← صورت بالا، گزینه‌ها پایین */
.slide>*{flex-shrink:0}
.slide.sl-center>section:first-of-type{margin-top:auto}
.slide.sl-center>section:last-of-type{margin-bottom:auto}
/* اسلاید سؤال (مثل دوئولینگو): دستور کار عنوانِ بالا؛ محتوا + گزینه‌ها با هم وسطِ فضای باقی‌مانده */
.q-title{font-size:20px;font-weight:800;line-height:1.7;margin:4px 0 6px;color:var(--muted)}
.q-head{flex-shrink:0}
.q-head .s-h{font-size:24px;line-height:1.9;margin:0 0 4px}
/* محتوا و گزینه‌ها: کمی بالاتر از وسطِ فضای خالی (فاصلهٔ بالا ۱ سهم، پایین ۲ سهم) */
.q-body{flex:1 0 auto;display:flex;flex-direction:column}
.q-body::before{content:"";flex:1 1 0;min-height:12px}
.q-body::after{content:"";flex:2 1 0}
.q-body>.blk{margin-bottom:14px}
.q-body>.blk:last-child{margin-bottom:6px}
.blk-q{display:flex;flex-direction:column}
.q-body .blk-q>.s-h{text-align:center;font-size:24px;line-height:1.9}
.s-h.big-math{text-align:center;font-size:30px;line-height:1.6}
.blk-q>.opts{margin-top:24px}
.q-body>.blk:not(.blk-q)+.blk-q>.opts{margin-top:14px}
@media (min-width:700px){.body.slide:has(.blk-q) .blk-graph .chart{max-width:440px}.body.slide:has(.blk-q) .blk-graphs .graph-grid{max-width:440px}}
@media (min-width:700px){.q-title{font-size:22px;margin:22px 0 8px}.q-head .s-h,.q-body .blk-q>.s-h{font-size:30px}.s-h.big-math{font-size:40px}.blk-q>.opts{margin-top:40px}}
.slide .blk:last-child{margin-bottom:8px}
/* نمودار کنار سؤال جمع‌وجورتر، تا صورت و گزینه‌ها بدون اسکرول دیده شوند */
.slide:has(.blk-q) .blk-graph .chart{max-width:330px;margin-top:4px}
.slide:has(.blk-q) .blk-curveline .chart{max-width:270px;margin-top:2px}
.slide:has(.blk-q) .blk-graphs .graph-grid{max-width:300px;margin:4px auto 0}
.slide:has(.blk-q) .blk-graph .hint{margin-top:2px}


.slide:has(.blk-q) .blk-graph,.slide:has(.blk-q) .blk-graphs,.slide:has(.blk-q) .blk-note{margin-bottom:8px}
.slide:has(.blk-q) .blk-note .note-block{padding:10px 14px;font-size:18px}
.s-h{font-size:26px;font-weight:800;margin:8px 0 6px;line-height:1.75}
.q-kicker{font-size:15px;color:var(--muted);font-weight:800;margin-top:6px}
.prompt{font-size:21px;line-height:2;margin:0 0 10px}
.kx{margin:0 .1em}
.prompt .kx,.s-h .kx,.note-block .kx{vertical-align:middle}
.blank{display:inline-block;min-width:90px;border-bottom:2px solid var(--gray-d);text-align:center;color:var(--blue);margin:0 4px}
.math{direction:ltr;text-align:center;font-family:'Nunito',sans-serif;font-style:italic;font-weight:800;font-size:36px;line-height:1.7;margin:22px 0 0;letter-spacing:1px;white-space:pre-line;overflow-wrap:anywhere}
.kx{direction:ltr;unicode-bidi:isolate;display:inline-block}
.note-block{background:rgba(255,150,0,.08);border-right:5px solid var(--orange);border-radius:14px;padding:14px 16px;line-height:2;font-size:19px}
/* کارت قانون: عنوان رنگی + بندهای شماره‌دار */
.rule-card{border:2px solid var(--line);border-radius:18px;overflow:hidden;background:var(--card)}
.rule-h{background:rgba(28,176,246,.12);color:var(--blue-d);font-size:19px;font-weight:800;padding:10px 16px}
.rule-list{list-style:none;margin:0;padding:6px 14px 8px}
.rule-list li{display:flex;gap:12px;align-items:flex-start;padding:10px 0;font-size:20px;line-height:2}
.rule-list li+li{border-top:2px dashed var(--line)}
.rule-n{flex:none;width:30px;height:30px;margin-top:6px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:16px;font-weight:800}
.rule-card .math{margin:0;padding:6px 10px 14px;border-top:2px solid var(--line)}
.chart{direction:ltr;margin:14px auto 0;max-width:420px;width:100%;text-align:center}
.plot-info{direction:ltr;text-align:center;font-family:'Nunito',sans-serif;font-size:16px;color:var(--green-d);margin:6px 0}
.lim-read{direction:ltr;display:flex;gap:8px;justify-content:center;margin-top:10px}
.lim-chip{flex:1;max-width:180px;border:2px solid var(--line);border-radius:14px;padding:8px 6px;background:var(--card);text-align:center;font-family:'Nunito',sans-serif;font-weight:800;font-size:17px;white-space:nowrap}
.lim-chip span{color:var(--muted);font-style:italic;margin-right:6px}
.lim-chip b{color:var(--orange-d)}
.math.math-sm{font-size:26px;margin-top:14px}
.lt{direction:ltr;width:100%;max-width:300px;margin:14px auto 0;border-collapse:separate;border-spacing:8px 6px;table-layout:fixed}
.lt th,.lt td{border:2px solid var(--line);border-radius:12px;padding:10px 2px;text-align:center;font-weight:800;font-size:19px;background:var(--card);font-family:'Nunito',sans-serif;overflow:hidden}
.lt th{color:var(--blue);border-color:transparent;background:none;font-style:italic;font-size:20px;padding:2px;border-bottom:2px solid var(--blue);border-radius:0}
.lt td.lt-x{background:none;border-style:dashed;color:var(--muted)}
.lt td.lt-slot{cursor:pointer;color:var(--gray-d)}
.lt td.lt-slot.filled{color:var(--blue)}
.lt td.lt-slot.act{border-color:var(--blue);box-shadow:0 0 0 3px rgba(28,176,246,.2)}
.opt.lt-chip{direction:ltr;font-family:'Nunito',sans-serif;font-weight:800}
.lt input{width:100%;min-width:0;border:0;background:none;font:inherit;text-align:center;color:var(--blue);outline:none}
.lt td:focus-within{border-color:var(--blue)}
.lt td.right{border-color:var(--green);background:var(--ok-bg)}
.lt td.wrong{border-color:var(--red);background:var(--red-bg)}
.sliders{direction:ltr;max-width:380px;width:100%;margin:14px auto 0}
.srow{margin-bottom:14px}
.srow .lbl{display:flex;justify-content:space-between;font-size:17px;color:var(--muted);margin-bottom:4px;direction:rtl}
.srow .lbl b{direction:ltr;unicode-bidi:isolate;color:var(--blue);font-family:'Nunito',sans-serif;font-style:italic}
.srow input[type=range]{width:100%;accent-color:var(--blue)}
.hint{text-align:center;color:var(--muted);font-size:16px;margin-top:10px;min-height:1em}
.opts{display:grid;gap:10px;margin-top:16px}
.opts.two{grid-template-columns:1fr 1fr}
.opt{padding:14px 14px;border:2px solid var(--line);border-bottom-width:4px;border-radius:16px;background:var(--card);font-size:20px;line-height:1.7;text-align:center}
.opt .kx .katex{font-size:1.3em}
.opt:not(:disabled):hover{background:var(--hover)}
.opt.sel{border-color:var(--blue);background:rgba(28,176,246,.12);color:var(--blue)}
.opt.correct{border-color:var(--green);background:var(--ok-bg);color:var(--green-d)}
.opt.wrong{border-color:var(--red);background:var(--red-bg);color:var(--red)}
.opt.ltr{direction:ltr;font-family:'Nunito',sans-serif;font-style:italic;font-weight:800;font-size:21px}
.exercise-input{font:inherit;display:block;width:100%;border:2px solid var(--line);border-bottom-width:4px;border-radius:14px;padding:16px;background:var(--bg);color:inherit;text-align:center;outline:none;margin-top:16px;font-size:18px}
.exercise-input:focus{border-color:var(--blue)}
.exercise-input.right{border-color:var(--green);background:var(--ok-bg)}
.exercise-input.wrong{border-color:var(--red);background:var(--red-bg)}
.order-line{min-height:64px;border-bottom:2px solid var(--line);display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:10px 0;margin-top:16px}
.order-ph{color:var(--muted);font-size:17px}
.word-bank{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:18px 0}
.opt.chip{width:auto;min-width:0;padding:10px 16px;margin:0;font-size:19px}
/* مرتب‌سازی: قطعه‌ها ردیف‌های تمام‌عرض؛ قطعه‌های چیده‌شده شماره می‌خورند */
.blk-order .order-line,.blk-order .word-bank{flex-direction:column;align-items:stretch;flex-wrap:nowrap}
.blk-order .order-line{counter-reset:ord;border-bottom:0;padding:0;min-height:0;gap:8px}
.blk-order .order-line .order-ph{border:2px dashed var(--line);border-radius:16px;padding:14px;text-align:center}
.blk-order .opt.chip{width:100%;text-align:right;line-height:1.8}
.blk-order .order-line .opt.chip{border-color:var(--blue);color:var(--blue)}
.blk-order .order-line .opt.chip::before{counter-increment:ord;content:counter(ord,persian) ". "}
.blk-order .word-bank{margin:14px 0 0;padding-top:14px;border-top:2px solid var(--line)}
.blk-limtable .word-bank{display:grid;grid-template-columns:1fr 1fr;max-width:300px;margin:18px auto 0;width:100%}
.match{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}
.match-col{display:grid;grid-auto-rows:1fr;gap:10px}
.opt.match-it.ltr{font-size:19px}
.opt.match-it{padding:14px 10px;transition:background .15s,border-color .15s}
.opt.match-it.correct{opacity:.55}
.graph-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.graph-cell{margin:0;text-align:center}
.graph-cell figcaption{direction:ltr;font-family:'Nunito',sans-serif;font-style:italic;font-weight:800;font-size:18px;margin-top:4px;white-space:nowrap}
.graph-cell figcaption .katex,.opt.gm-lbl .katex{font-size:1em}
.graph-grid .chart,.graph-opt .chart{margin:0 auto}
.opt.graph-opt{padding:6px}
.opt.gm-lbl{font-size:16px;padding:14px 4px;display:flex;align-items:center;justify-content:center}
.match-col .opt.gm-lbl{flex:1}
.retry-tag{display:inline-block;align-self:flex-start;font-size:15px;color:var(--orange-d);background:rgba(255,150,0,.14);padding:2px 10px;border-radius:99px;margin-bottom:6px}
.blk-err{color:var(--red);padding:10px;border:2px solid var(--red);border-radius:12px;background:var(--red-bg);text-align:center;font-weight:800;font-size:13px}
.math .mo{color:var(--blue)}
.math sup{font-size:.6em;line-height:0}
.frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;line-height:1.2;margin:0 .12em;font-style:normal}
.frac .fn{border-bottom:.09em solid currentColor;padding:0 .25em .05em}
.frac .fd{padding:.05em .25em 0}
.limop{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;line-height:1.15;margin:0 .2em}
.limop small{font-size:.5em;font-weight:800;color:var(--muted)}
.prompt .frac,.s-h .frac{font-size:.9em}
@media (max-width:420px){.math{font-size:28px}}

/* ===== اعلان ===== */
#toasts{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:100;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;width:calc(100% - 32px);max-width:460px}
.toast{background:#2f3437;color:#fff;padding:10px 16px;border-radius:10px;font-size:14px;font-weight:500;box-shadow:var(--shadow);transition:opacity .3s,transform .3s;line-height:1.7}
.toast.ok{background:#2f7d12}.toast.bad{background:#b42318}.toast.warn{background:#9a5b00}
.toast.out{opacity:0;transform:translateY(8px)}

/* ======================================================
   ویرایشگر (به سبک Notion)
   ====================================================== */
#editor{position:fixed;inset:0;z-index:30;background:var(--bg);display:grid;grid-template-columns:250px minmax(0,1fr) 400px;font-weight:500}
.ed-side{background:var(--side);border-left:1px solid var(--line);display:flex;flex-direction:column;min-height:0;font-size:14px}
.side-home{border:0;background:none;text-align:right;padding:12px 14px;color:var(--muted);font-size:13px}
.side-home:hover{background:var(--hover)}
.side-title{padding:6px 14px 4px;font-size:12px;color:var(--muted);font-weight:700}
.side-search{margin:4px 10px 8px;font:inherit;font-size:13px;border:0;border-radius:6px;padding:7px 10px;background:var(--hover);color:inherit;outline:none}
.side-search:focus{box-shadow:0 0 0 2px var(--sel)}
.side-tree{flex:1;overflow:auto;padding:0 6px 10px}
.tu{display:flex;align-items:center;gap:8px;padding:6px 8px;margin-top:8px;border-radius:6px;font-weight:700;font-size:13px;color:var(--muted)}
.tu:hover{background:var(--hover)}
.tu-dot{width:10px;height:10px;border-radius:3px;flex:none;display:inline-block}
.tu-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tu-in{flex:1;font:inherit;border:0;border-radius:4px;padding:2px 6px;background:var(--bg);color:inherit;outline:2px solid var(--blue)}
.tu-act{border:0;background:none;width:22px;height:22px;border-radius:4px;color:var(--muted);opacity:0;padding:0}
.tu:hover .tu-act{opacity:1}
.tu-act:hover{background:var(--hover2)}
.tl{display:flex;align-items:center;gap:8px;padding:6px 10px 6px 8px;margin-right:12px;border-radius:6px;cursor:pointer;color:var(--text)}
.tl:hover{background:var(--hover)}
.tl.on{background:var(--hover2);font-weight:700}
.tl-ic{font-size:13px;opacity:.75}
.tl-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tl-dirty{width:7px;height:7px;border-radius:50%;background:var(--orange);flex:none}
.tl-empty{margin-right:30px;padding:4px 0;font-size:12px;color:var(--gray-d)}
.tu.drop,.tl.drop{box-shadow:inset 0 2px 0 var(--blue);background:var(--sel)}
.side-actions{display:flex;gap:4px;padding:6px 8px;border-top:1px solid var(--line)}
.side-btn{flex:1;border:0;background:none;padding:8px;border-radius:6px;color:var(--muted);font-size:13px}
.side-btn:hover{background:var(--hover);color:var(--text)}
.side-foot{padding:8px 10px 12px}
.fold-btn{width:100%;display:flex;flex-direction:column;align-items:flex-start;gap:2px;border:1px dashed var(--gray-d);border-radius:8px;background:none;padding:8px 10px;font-size:13px;text-align:right}
.fold-btn.on{border-style:solid;border-color:var(--line);background:var(--bg)}
.fold-btn small{color:var(--muted);font-size:11px}
.fold-note{font-size:12px;color:var(--muted);line-height:1.8}
.side-scrim{display:none}

.ed-main{display:flex;flex-direction:column;min-width:0;min-height:0}
.ed-top{height:48px;flex:none;display:flex;align-items:center;gap:10px;padding:0 14px;border-bottom:1px solid var(--line)}
.crumb{display:flex;align-items:center;gap:6px;min-width:0;font-size:14px;flex:1}
.crumb-u{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:40%}
.crumb-sep{color:var(--gray-d)}
.crumb-l{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chip-status{font-size:12px;color:var(--muted);white-space:nowrap;display:flex;align-items:center;gap:6px}
.chip-status:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}
.chip-status.dirty:before{background:var(--orange)}
.top-acts{display:flex;align-items:center;gap:4px}
.top-ic{border:0;background:none;min-width:30px;height:30px;border-radius:6px;font-size:16px;color:var(--muted);padding:0 6px}
.top-ic:not(:disabled):hover{background:var(--hover);color:var(--text)}
.top-ic:disabled{opacity:.35}
.top-btn{border:0;background:none;height:30px;border-radius:6px;padding:0 12px;font-size:14px;font-weight:700;display:flex;align-items:center;gap:6px;white-space:nowrap}
.top-btn:hover{background:var(--hover)}
.top-btn.primary{background:var(--blue);color:#fff}
.top-btn.primary:hover{background:var(--blue-d)}
.badge{background:#fff;color:var(--blue-d);border-radius:99px;font-size:11px;min-width:18px;height:18px;display:inline-grid;place-items:center;padding:0 5px}
.only-m{display:none}

.ed-scroll{flex:1;overflow:auto}
.ed-doc{max-width:760px;margin:0 auto;padding:0 72px 140px}
.ed-empty{text-align:center;padding-top:120px;color:var(--muted)}
.ed-empty .big{font-size:56px}
.doc-cover{height:70px;margin:0 -72px;opacity:.9;border-radius:0 0 4px 4px}
.doc-title{font-size:38px;font-weight:800;outline:0;margin:32px 0 10px;line-height:1.4;white-space:pre-wrap;overflow-wrap:anywhere}
[data-placeholder]:empty:before{content:attr(data-placeholder);color:var(--gray-d);pointer-events:none}
.props{display:flex;flex-direction:column;gap:2px;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:22px;font-size:14px}
.prop{display:flex;align-items:center;min-height:34px}
.prop-k{width:130px;flex:none;color:var(--muted);display:flex;align-items:center;gap:8px}
.prop-ic{width:18px;text-align:center}
.prop-v{flex:1;min-width:0}
.prop-in{font:inherit;border:0;background:none;color:inherit;padding:5px 8px;border-radius:6px;cursor:pointer;max-width:100%}
.prop-in:hover{background:var(--hover)}
.prop-code{direction:ltr;display:inline-block;font-family:var(--mono);font-size:12px;background:var(--hover);padding:3px 8px;border-radius:4px;color:var(--red-d)}

.es{position:relative;border:1px solid transparent;border-radius:12px;padding:10px 0 6px;margin-bottom:14px;transition:border-color .15s,background .15s}
.es.focus{border-color:var(--line);background:linear-gradient(var(--hover),var(--hover)) top/100% 40px no-repeat}
.es.dragging{opacity:.4}
.es.drop-before{box-shadow:0 -3px 0 var(--blue)}
.es.drop-after{box-shadow:0 3px 0 var(--blue)}
.es-head{display:flex;align-items:center;gap:6px;padding:0 12px 6px;font-size:12px;color:var(--muted)}
.es-grip{cursor:grab;opacity:.5;padding:2px 4px;border-radius:4px;letter-spacing:-2px;user-select:none}
.es-grip:hover{opacity:1;background:var(--hover)}
.es-num{font-weight:700}
.es-tag{background:rgba(255,150,0,.14);color:var(--orange-d);padding:1px 8px;border-radius:99px;font-size:11px}
.es-sp{flex:1}
.es-act{border:0;background:none;width:26px;height:26px;border-radius:5px;color:var(--muted);opacity:0;transition:opacity .12s;padding:0;font-size:13px}
.es:hover .es-act,.es.focus .es-act{opacity:1}
.es-act:not(:disabled):hover{background:var(--hover2)}
.es-act:disabled{opacity:0!important}
.es-blocks{padding:0 12px;min-height:30px}
.es-blocks.drop-end{box-shadow:inset 0 -3px 0 var(--blue)}
.es-empty{color:var(--gray-d);font-size:14px;padding:8px 0}
.es-add{border:0;background:none;color:var(--gray-d);padding:6px 12px;margin:0 6px;border-radius:6px;font-size:14px;opacity:0;transition:opacity .12s}
.es:hover .es-add,.es.focus .es-add{opacity:1}
.es-add:hover{background:var(--hover);color:var(--muted)}
.add-slide{width:100%;border:1px dashed var(--line);border-radius:12px;background:none;color:var(--muted);padding:14px;font-size:14px}
.add-slide:hover{background:var(--hover);color:var(--text)}

.eb{position:relative;margin:2px 0;border-radius:6px}
.eb.dragging{opacity:.35}
.eb.drop-before{box-shadow:0 -2px 0 var(--blue)}
.eb.drop-after{box-shadow:0 2px 0 var(--blue)}
.eb-gutter{position:absolute;right:-56px;top:3px;display:flex;gap:2px;opacity:0;transition:opacity .12s}
.eb:hover>.eb-gutter,.eb:focus-within>.eb-gutter{opacity:1}
.eb-plus,.eb-grip{width:24px;height:24px;border:0;background:none;border-radius:4px;color:var(--gray-d);display:grid;place-items:center;font-size:17px;padding:0;user-select:none}
.eb-grip{cursor:grab;font-size:13px;letter-spacing:-2px}
.eb-plus:hover,.eb-grip:hover{background:var(--hover2);color:var(--muted)}
.ib{outline:0;min-height:1.9em;white-space:pre-wrap;overflow-wrap:anywhere;padding:3px 2px;line-height:1.9;font-size:16px}
.ib:empty:before{opacity:0}
.ib:focus:empty:before{opacity:1}
.es.focus .ib:empty:before,.es-blocks .eb:only-child .ib:empty:before{opacity:1}
.ib-h{font-size:24px;font-weight:800;margin-top:6px}
.ib-f{direction:ltr;text-align:center;font-family:'Nunito',sans-serif;font-style:italic;font-weight:800;font-size:26px}
.ib-note{background:rgba(28,176,246,.06);border-right:4px solid var(--blue);border-radius:6px;padding:10px 14px}
.eb-unknown{color:var(--red);font-size:13px;padding:6px}

.ec{border:1px solid var(--line);border-radius:10px;margin:8px 0;background:var(--bg)}
.ec:focus-within{border-color:rgba(28,176,246,.5)}
.ec-head{display:flex;align-items:center;gap:10px;padding:10px 12px;cursor:pointer;user-select:none;border-radius:10px}
.ec-head:hover{background:var(--hover)}
.ec-ic{width:26px;height:26px;border-radius:6px;background:var(--hover2);display:grid;place-items:center;font-size:14px;flex:none}
.ec-label{font-weight:700;font-size:14px;white-space:nowrap}
.ec-sum{flex:1;min-width:0;color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ec-tag{font-size:11px;color:var(--orange-d);background:rgba(255,150,0,.14);padding:1px 8px;border-radius:99px;white-space:nowrap}
.ec-chev{color:var(--gray-d);transition:transform .15s;transform:rotate(90deg)}
.ec.open .ec-chev{transform:none}
.ec-form{display:none;padding:4px 14px 14px;border-top:1px solid var(--line)}
.ec.open .ec-form{display:block}
.ef{display:block;margin-top:12px}
.ef-k{display:flex;justify-content:space-between;gap:8px;font-size:12px;color:var(--muted);margin-bottom:5px;font-weight:700}
.ef-in{width:100%;font:inherit;font-size:15px;color:inherit;background:var(--field);border:1px solid var(--line);border-radius:6px;padding:7px 10px;outline:none;resize:none;line-height:1.8}
.ef-in:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--sel);background:var(--bg)}
.ef-in.ltr{direction:ltr;text-align:left}
.ef-in.mono{font-family:var(--mono);font-size:13px}
.ef-in.bad{border-color:var(--red)}
select.ef-in{cursor:pointer}
.ef-state{font-weight:500}.ef-state.ok{color:var(--green-d)}.ef-state.bad{color:var(--red)}
.ef-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:0 10px}
.ef-bool{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:14px}
.ef-bool .ef-k{margin:0;font-size:14px;color:var(--text);font-weight:500}
.ef-tog{position:absolute;opacity:0;pointer-events:none}
.tog{width:32px;height:18px;border-radius:99px;background:var(--gray);position:relative;flex:none;transition:background .15s}
.tog:after{content:"";position:absolute;top:2px;right:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:transform .15s;box-shadow:0 1px 2px rgba(0,0,0,.2)}
.ef-tog:checked+.tog{background:var(--blue)}
.ef-tog:checked+.tog:after{transform:translateX(-14px)}
.ef-tog:focus-visible+.tog{outline:3px solid var(--blue);outline-offset:2px}
.ch-list{display:flex;flex-direction:column;gap:6px}
.ch-row{display:flex;align-items:center;gap:6px}
.ch-in{flex:1}
.ch-radio{width:20px;height:20px;border-radius:50%;border:2px solid var(--gray-d);background:none;flex:none;padding:0}
.ch-row.right .ch-radio{border-color:var(--green);background:radial-gradient(var(--green) 45%,transparent 50%)}
.ch-row.right .ch-in{border-color:rgba(88,204,2,.6)}
.ch-num{width:20px;text-align:center;color:var(--muted);font-size:12px}
.ch-x{border:0;background:none;width:26px;height:26px;border-radius:5px;color:var(--gray-d);padding:0;flex:none}
.ch-x:not(:disabled):hover{background:var(--hover2);color:var(--text)}
.ch-x:disabled{opacity:.3}
.ef-add{border:0;background:none;color:var(--muted);padding:6px 4px;font-size:13px;border-radius:5px;margin-top:4px}
.ef-add:hover{color:var(--text);background:var(--hover)}
.ef-code{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--field)}
.code-tabs{display:flex;direction:ltr;border-bottom:1px solid var(--line);background:var(--hover)}
.code-tab{border:0;background:none;padding:7px 14px;font-family:var(--mono);font-size:12px;color:var(--muted);border-bottom:2px solid transparent}
.code-tab.on{color:var(--text);border-bottom-color:var(--blue);background:var(--bg)}
.code-area{display:block;width:100%;min-height:150px;border:0;outline:0;resize:none;padding:12px;font-family:var(--mono);font-size:13px;line-height:1.65;background:var(--bg);color:inherit;tab-size:2;overflow-x:auto}
.code-help{font-size:12px;color:var(--muted);padding:8px 12px;line-height:2;border-top:1px solid var(--line)}
.code-help code{direction:ltr;unicode-bidi:isolate;font-family:var(--mono);background:var(--hover2);padding:1px 5px;border-radius:4px;font-size:11px}

/* منوی شناور (/ و ⋯) */
.pop{position:fixed;z-index:60;background:var(--pop);border-radius:10px;box-shadow:var(--shadow);min-width:230px;max-width:320px;padding:6px;font-size:14px;font-weight:500}
.picker{width:300px}
.pop-search{width:100%;font:inherit;border:0;border-bottom:1px solid var(--line);background:none;color:inherit;padding:6px 8px 10px;outline:none;margin-bottom:4px}
.pop-list{max-height:340px;overflow:auto}
.pop-cat{font-size:11px;color:var(--muted);padding:8px 8px 4px;font-weight:700}
.pop-item{display:flex;align-items:center;gap:10px;width:100%;border:0;background:none;padding:6px 8px;border-radius:6px;text-align:right}
.pop-item.on,.pop-item:not(:disabled):hover{background:var(--hover2)}
.pop-item:disabled{opacity:.4}
.pop-item.danger{color:var(--red)}
.pop-ic{width:22px;text-align:center;flex:none;display:grid;place-items:center}
.pop-ic.big{width:36px;height:36px;border:1px solid var(--line);border-radius:6px;background:var(--bg);font-size:16px}
.pop-tx{display:flex;flex-direction:column;min-width:0}
.pop-tx b{font-weight:600}
.pop-tx small{color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pop-sep{height:1px;background:var(--line);margin:5px 4px}
.pop-empty{padding:12px;color:var(--muted);text-align:center}

/* پیش‌نمایش */
.ed-prev{border-right:1px solid var(--line);background:var(--side);display:flex;flex-direction:column;align-items:center;padding:12px 18px;min-height:0;overflow:auto}
.prev-head{width:100%;max-width:360px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}
.prev-t{font-weight:700}
.prev-nav{display:flex;align-items:center;gap:4px}
.phone{width:100%;max-width:360px;height:640px;flex:none;border:8px solid #202426;border-radius:34px;background:var(--bg);display:flex;flex-direction:column;overflow:hidden;box-shadow:0 12px 32px rgba(0,0,0,.18);font-weight:700}
.phone-bar{padding:14px 16px 6px}
.phone-bar .bar{height:10px}
.phone-screen{flex:1;overflow:auto;padding:10px 16px;font-size:15px;display:flex;flex-direction:column}
.phone-screen .s-h{font-size:21px}
.phone-screen .prompt,.phone-screen .rule-list li,.phone-screen .note-block{font-size:17px}
.phone-screen .math{font-size:24px}
.phone-screen .opt{padding:12px;font-size:15px}
.phone-screen .opt.ltr{font-size:17px}
.phone-foot{border-top:2px solid var(--line);padding:10px 12px;display:flex;justify-content:space-between;align-items:center;gap:10px}
.phone-msg{font-size:14px;font-weight:800;min-width:0}
.phone-msg small{font-size:12px}
.go.sm{min-width:96px;padding:10px 14px;font-size:14px;flex:none}
.prev-reset{margin-top:10px;border:0;background:none;color:var(--muted);font-size:13px;padding:6px 10px;border-radius:6px}
.prev-reset:hover{background:var(--hover)}

@media (max-width:1180px){
  #editor{grid-template-columns:240px minmax(0,1fr)}
  .ed-prev{display:none}
}
@media (max-width:760px){
  #editor{grid-template-columns:minmax(0,1fr)}
  .ed-side{position:fixed;top:0;bottom:0;right:0;width:280px;z-index:40;transform:translateX(100%);transition:transform .2s;box-shadow:var(--shadow)}
  #editor.side-open .ed-side{transform:none}
  #editor.side-open .side-scrim{display:block;position:fixed;inset:0;z-index:35;background:rgba(0,0,0,.3)}
  .only-m{display:inline-block}
  .hide-m{display:none}
  .chip-status{font-size:0;gap:0}
  .crumb-u,.crumb-sep{display:none}
  .ed-doc{padding:0 16px 120px 16px}
  .doc-cover{margin:0 -16px;height:44px}
  .doc-title{font-size:28px;margin-top:22px}
  .prop-k{width:96px}
  .es-blocks{padding-right:40px;padding-left:4px}
  .eb-gutter{right:-40px;opacity:1}
  .eb-plus{display:none}
  .es-act,.es-add{opacity:1}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* صفحه‌های کوتاه: سربرگ و پایین فشرده‌تر تا جای بیشتری برای اسلاید بماند */
@media (max-height:780px){
  .lhead{padding:10px 16px}
  .body{padding-top:6px;padding-bottom:6px}
  .foot{padding-top:10px;padding-bottom:calc(10px + env(safe-area-inset-bottom,0px))}
  .go{padding-top:11px;padding-bottom:11px}
  .q-title{margin-top:2px}
  .blk-q>.opts{margin-top:18px!important}
}

/* بلوک تبدیل نمودار: لغزنده‌ها فشرده تا نمودار + لغزنده + سؤال در یک صفحه جا شوند */
.blk-transform .sliders{margin-top:6px}
.blk-transform .srow{margin-bottom:4px}
.blk-transform .srow .lbl{font-size:16px;margin-bottom:0}
.blk-transform .tr-eq{margin:2px 0 0;min-height:30px}
.blk-trace .sliders{margin-top:6px}
.blk-trace .srow{margin-bottom:4px}
.blk-trace .srow .lbl{font-size:16px;margin-bottom:0}
.blk-trace .tr-verdict{font-weight:800;font-size:18px;text-align:center;min-height:26px}
.blk-trace .lim-read{margin-top:4px}
.blk-trace .lim-read{flex-wrap:wrap}
.blk-trace .lim-chip{font-size:15px;padding:6px 4px;flex:1 1 40%}

/* جدول رفتار تابع (behtable) */
.bt-wrap{direction:ltr;margin:6px auto 0;max-width:100%}
.bt{width:100%;border-collapse:collapse;table-layout:fixed;direction:ltr;font-family:'Nunito',sans-serif}
.bt th{width:34px;font-size:18px;font-style:italic;font-weight:800;color:var(--gray-d);text-align:center;padding:0}
.bt td{border:2px solid var(--line);text-align:center;padding:4px 0;height:46px;vertical-align:middle;overflow:visible}
.bt td.bt-b{width:50px;font-size:17px;font-weight:800;color:var(--gray-d)}
.bt .bt-l{float:left;margin-left:4px;font-weight:800;font-size:15px;color:var(--gray-d)}
.bt .bt-r{float:right;margin-right:4px;font-weight:800;font-size:15px;color:var(--gray-d)}
.bt .bt-s{font-size:22px;font-weight:900;line-height:1}
.bt .bt-s.pos{color:var(--green-d)}.bt .bt-s.neg{color:var(--red-d)}
.bt button.bt-s{width:100%;height:40px;border:2px dashed var(--blue);background:var(--card);border-radius:10px;color:var(--blue-d);cursor:pointer}
.bt button.bt-s.pos,.bt button.bt-s.neg{border-style:solid}
.bt button.bt-s.bad{border-color:var(--red);background:var(--card)}
.bt .bt-q{font-size:20px;font-weight:900;color:var(--muted)}
.bt .bt-dot{color:var(--orange-d);font-size:20px}
.bt tr.bt-mk td{border:0;height:28px;padding:0}
.bt td.bt-m{font-size:15px;color:var(--orange-d);white-space:nowrap;overflow:visible}
.bt tr.bt-x td{background:var(--card)}