/* بازطراحی ۱۰-۱۶ و اصلاحِ ۱۰-۱۹ طبق .claude/session-chat-fix/ux-audit.md؛ فقط توکن‌های note.css */
/* در تبِ بپرس نوار به ته‌ی صفحه می‌چسبد: padding پایینِ .wrap صفر و تب تمام‌عرض (padding کناریِ .wrap / #hubtabs جبران می‌شود) */
body.chat-on .wrap,body.chat-on.kb .wrap{padding-bottom:0}
.hubtab[data-tab="chat"]{margin-inline:-10px}
.hchat{--hc-pad:14px;display:flex;flex-direction:column;min-height:calc(100vh - var(--hub-top,0px) - 12px);min-height:calc(100dvh - var(--hub-top,0px) - 12px);padding:0 var(--hc-pad) var(--hchat-ap,0px);font-size:calc(16px*var(--fsc,1))}
.hchat-svg{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

/* --- حالت خالی --- */
.hchat-empty{padding:22px 2px 6px;text-align:center;color:var(--dim)}
.hchat-hero{width:56px;height:56px;border-radius:50%;margin:0 auto 10px;display:flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent)}
.hchat-hero .hchat-svg{width:28px;height:28px}
.hchat-empty h3{margin:0 0 4px;font-size:18px;font-weight:800;color:var(--ink);line-height:1.7}
.hchat-empty p{margin:0 auto 16px;max-width:330px;font-size:14px;line-height:1.9}
.hchat-empty .hchat-rule{margin:14px auto 0;max-width:340px;font-size:13px;line-height:1.8;color:var(--dim);text-wrap:balance}
.hchat-starters{display:flex;flex-direction:column;gap:8px;align-items:stretch}
.hchat-chip{display:flex;align-items:center;gap:10px;font:inherit;font-size:15px;line-height:1.6;text-align:start;min-height:48px;padding:6px 14px;border:1px solid var(--accent-line);border-radius:14px;background:var(--paper);color:var(--ink);box-shadow:0 1px 2px rgba(20,26,46,.04);overflow:hidden;white-space:nowrap;text-overflow:ellipsis;transition:background .12s,transform .12s}
.hchat-chip .hchat-svg{width:18px;height:18px;color:var(--accent)}
.hchat-chip:active{background:var(--accent-soft);transform:scale(.99)}

/* --- لیست --- */
.hchat-list{flex:1;display:flex;flex-direction:column;gap:16px;padding:14px 0 12px}
.hchat-pair{display:flex;flex-direction:column;gap:8px;scroll-margin-top:calc(var(--hub-top,0px) + 8px);animation:hchat-in .2s ease-out both}
@keyframes hchat-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.hchat-q{align-self:flex-start;max-width:86%;padding:8px 15px;border-radius:18px;border-end-start-radius:5px;background:var(--accent);color:#fff;line-height:1.8;font-size:1em;white-space:pre-wrap;overflow-wrap:anywhere}
[data-theme="dark"] .hchat-q{color:#101219}
.hchat-a{align-self:stretch;padding:13px 16px 4px;border-radius:18px;border-end-end-radius:5px;background:var(--paper);border:1px solid var(--line);box-shadow:0 1px 2px rgba(20,26,46,.05);color:var(--ink);line-height:1.9;font-size:1em;overflow-wrap:anywhere}
[data-theme="dark"] .hchat-a{border-color:var(--accent-line)}
.hchat-note{color:var(--dim);font-size:13.5px}
.hchat-caution,.hchat-aud{margin:10px 0 0;padding:8px 12px;border-radius:12px;background:var(--emph-bg);border:1px solid var(--emph-line);color:var(--emph-ink);font-size:13.5px;line-height:1.8}

/* --- متنِ جواب: پاراگراف، فهرست، فرمول --- */
.hchat-txt p{margin:0 0 10px}
.hchat-txt b{font-weight:800}
.hchat-txt ul,.hchat-txt ol{margin:0 0 10px;padding-inline-start:22px}
.hchat-txt ol{list-style-type:decimal;list-style-type:persian}
.hchat-txt li{margin:0 0 4px;padding-inline-start:2px}
.hchat-txt li::marker{color:var(--accent);font-weight:800}
.hchat-math.hchat-mi{unicode-bidi:isolate;direction:ltr;display:inline-block;font-size:1.04em;max-width:100%;overflow-x:auto;vertical-align:middle}
.hchat-md{margin:4px 0 12px;padding:10px 12px;border-radius:12px;background:var(--muted-bg);direction:ltr;text-align:center;overflow-x:auto;-webkit-overflow-scrolling:touch}
.hchat-md .katex-display{margin:0}
.hchat-math.tex{font-family:monospace;direction:ltr;unicode-bidi:isolate}
.hchat-nfrow{display:flex;gap:10px;align-items:flex-start;color:var(--ink)}
.hchat-nfrow>.hchat-svg{margin-top:6px;color:var(--dim)}
.hchat-nfrow .hchat-txt{flex:1;min-width:0}

/* --- دکمه‌ها --- */
.hchat-btn,.hchat-pay,.hchat-ghost{font:inherit;font-weight:700;min-height:44px;padding:0 18px;border-radius:14px;cursor:pointer}
.hchat-btn{display:inline-flex;align-items:center;justify-content:center;border:1.5px solid var(--accent);background:transparent;color:var(--accent);font-size:15px}
.hchat-btn.hchat-fill,.hchat-pay{background:var(--accent);color:#fff;border:0}
[data-theme="dark"] .hchat-btn.hchat-fill,[data-theme="dark"] .hchat-pay{color:#101219}
.hchat-a.hchat-err,[data-theme="dark"] .hchat-a.hchat-err{border-color:var(--exam-line)}
.hchat-err .hchat-note{margin:0 0 10px;color:var(--ink);font-size:14px}
.hchat-a>.hchat-btn{margin:0 0 12px}

/* --- انتظار: سه نقطه + اسکلت --- */
.hchat-a.hchat-wait{display:block;padding-bottom:14px}
.hchat-waitrow{display:flex;align-items:center;gap:12px;color:var(--dim);font-size:14px}
.hchat-dots{position:relative;width:6px;height:6px;margin:0 14px;border-radius:50%;background:var(--accent);flex:none;animation:hchat-dot 1.2s ease-in-out infinite}
.hchat-dots::before,.hchat-dots::after{content:"";position:absolute;top:0;width:6px;height:6px;border-radius:50%;background:var(--accent);animation:inherit}
.hchat-dots::before{right:-12px;animation-delay:-.2s}
.hchat-dots::after{left:-12px;animation-delay:.2s}
@keyframes hchat-dot{0%,80%,100%{opacity:.25;transform:scale(.8)}40%{opacity:1;transform:scale(1.1)}}
.hchat-sk{margin-top:12px;display:flex;flex-direction:column;gap:9px}
.hchat-sk i{display:block;height:10px;border-radius:5px;background:linear-gradient(90deg,var(--muted-bg) 0%,var(--accent-soft) 50%,var(--muted-bg) 100%);background-size:200% 100%;animation:hchat-sh 1.4s linear infinite}
.hchat-sk i:nth-child(1){width:92%}.hchat-sk i:nth-child(2){width:78%}.hchat-sk i:nth-child(3){width:55%}
@keyframes hchat-sh{to{background-position:-200% 0}}

/* --- نقلِ استاد: ردیفِ بزرگِ قابل‌لمس؛ همهٔ ردیف پخش می‌کند، دکمهٔ بایست نیست --- */
.hchat-kick{display:flex;align-items:center;gap:6px;margin:14px 0 6px;font-size:13px;font-weight:700;color:var(--dim)}
.hchat-kick .hchat-svg{width:15px;height:15px;color:var(--accent)}
.hchat-quote{position:relative;display:flex;align-items:center;gap:12px;min-height:64px;margin:0 0 8px;padding:8px 14px;border-radius:14px;background:var(--muted-bg);border:1px solid var(--line);transition:background .15s,border-color .15s}
.hchat-qb{flex:1;min-width:0}
.hchat-qt{display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;font-size:14.5px;line-height:1.8;color:var(--ink);overflow-wrap:anywhere}
.hchat-clk{display:inline-flex;align-items:center;gap:6px;margin-top:3px;height:24px;padding:0 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent-ink);font-size:12.5px;font-weight:700;direction:ltr;unicode-bidi:isolate;font-variant-numeric:tabular-nums}
.hchat-pbtn{flex:none;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;box-shadow:0 2px 6px rgba(0,0,0,.14);transition:transform .12s}
[data-theme="dark"] .hchat-pbtn{color:#101219}
.hchat-pbtn .hchat-svg{width:20px;height:20px;fill:currentColor;stroke:none}
.hchat-pbtn .i-pause{display:none}
.hchat-quote.hchat-play{cursor:pointer;-webkit-tap-highlight-color:transparent}
.hchat-quote.hchat-play:active{background:var(--accent-soft)}
.hchat-quote.hchat-play:active .hchat-pbtn{transform:scale(.94)}
.hchat-quote.hchat-play:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.hchat-quote.hchat-playing{background:var(--accent-soft);border-color:var(--accent)}
.hchat-quote.hchat-playing .hchat-pbtn .i-play{display:none}
.hchat-quote.hchat-playing .hchat-pbtn .i-pause{display:block}
.hchat-eq{display:none;align-items:flex-end;gap:2px;height:11px}
.hchat-eq i{display:block;width:3px;border-radius:2px;background:var(--accent);animation:hchat-eq .9s ease-in-out infinite}
.hchat-eq i:nth-child(2){animation-delay:-.3s}.hchat-eq i:nth-child(3){animation-delay:-.6s}
@keyframes hchat-eq{0%,100%{height:3px}50%{height:11px}}
.hchat-playing .hchat-eq{display:inline-flex}

/* --- «از کجای کلاس؟»: ردیفِ جمع‌شده برای جوابی که سؤالش «کجا گفت» نبود --- */
.hchat-srcs{margin:8px 0 6px}
.hchat-src-t{display:flex;align-items:center;gap:8px;width:100%;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:14px;background:var(--muted-bg);color:var(--ink);font:inherit;font-size:14px;font-weight:700;text-align:start;cursor:pointer}
.hchat-src-t>.hchat-svg:first-child{width:16px;height:16px;color:var(--accent)}
.hchat-src-t span{flex:1}
.hchat-chev{width:18px;height:18px;color:var(--dim);transition:transform .15s}
.hchat-open .hchat-chev{transform:rotate(180deg)}
.hchat-src-b{padding-top:8px}
.hchat-src-b[hidden]{display:none}

/* --- توضیحِ خودِ پاسچی --- */
.hchat-gen{margin:6px 0 10px;padding:10px 14px;border-radius:14px;background:var(--muted-bg);border:1px dashed var(--accent-line);color:var(--ink);font-size:15px;line-height:1.9}
.hchat-gen-lbl{display:flex;align-items:center;gap:6px;margin-bottom:2px;font-size:13px;font-weight:800;color:var(--accent-ink)}
.hchat-gen-lbl .hchat-svg{width:16px;height:16px;color:var(--accent)}
.hchat-gen .hchat-txt p:last-child{margin-bottom:0}

/* --- پاورقی: خرج در ابتدا، رأی در انتها، یک ردیف --- */
.hchat-fb{margin:0 -8px}
.hchat-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:44px}
.hchat-spent{flex:1;min-width:0;padding-inline-start:8px;font-size:12.5px;line-height:1.7;color:var(--dim)}
.hchat-votes{display:flex;flex:none;margin-inline-start:auto}
.hchat-fb-btn{flex:none;width:44px;height:44px;padding:0;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;background:none;color:var(--dim);opacity:1;-webkit-tap-highlight-color:transparent;transition:background .12s,color .12s}
.hchat-fb-btn .hchat-svg{width:20px;height:20px}
.hchat-fb-up,.hchat-fb-down{flex:none}
.hchat-fb-btn:active{background:var(--accent-soft)}
.hchat-fb-btn.hchat-fb-on{color:var(--accent);background:var(--accent-soft);border:0}
.hchat-fb-btn.hchat-fb-on .hchat-svg{fill:currentColor;fill-opacity:.2;animation:hchat-pop .22s ease-out}
@keyframes hchat-pop{0%{transform:scale(.8)}60%{transform:scale(1.18)}100%{transform:scale(1)}}
.hchat-fb-reasons{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0;padding:2px 8px 8px;animation:hchat-in .2s ease-out both}
.hchat-fb-t{flex:0 0 100%;font-size:13px;color:var(--dim);line-height:1.7}
.hchat-fb-chip{font:inherit;font-size:14px;min-height:44px;padding:0 16px;border:1px solid var(--accent-line);border-radius:999px;background:var(--paper);color:var(--accent-ink);transition:background .12s}
.hchat-fb-chip:active{background:var(--accent-soft)}
.hchat-fb-chip.hchat-fb-on{background:var(--accent-soft);border-color:var(--accent);font-weight:700}
.hchat-fb-thanks{margin:0;padding:0 8px 8px;font-size:13px;color:var(--dim);animation:hchat-in .2s ease-out both}

/* --- پیشنهادِ دنباله زیرِ جوابِ تازه (هر کدام یک سؤال است) --- */
.hchat-follow{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 0}
.hchat-fchip{font:inherit;min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--accent-line);background:var(--paper);color:var(--accent-ink);font-size:14.5px;cursor:pointer}
.hchat-fchip:active{background:var(--accent-soft)}

/* --- نوار پایین --- */
.hchat-bar{position:sticky;bottom:calc(var(--hchat-ap,0px) + var(--hchat-kb,0px));z-index:5;margin:0 calc(var(--hc-pad)*-1);padding:8px var(--hc-pad) calc(10px + env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--line);box-shadow:0 -6px 16px rgba(20,26,46,.06)}
[data-theme="dark"] .hchat-bar{box-shadow:0 -6px 16px rgba(0,0,0,.35)}
.hchat-quota{width:fit-content;max-width:100%;margin:0 auto 8px;padding:3px 12px;border-radius:12px;background:var(--accent-soft);color:var(--accent-ink);font-size:12.5px;line-height:1.8;text-align:center}
.hchat-form{display:flex;gap:8px;align-items:flex-end}
.hchat-in{flex:1;min-width:0;font:inherit;font-size:16px;line-height:1.7;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:24px;padding:11px 16px;resize:none;max-height:132px;min-height:48px;transition:border-color .12s,box-shadow .12s}
.hchat-in::placeholder{color:var(--dim)}
.hchat-in:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.hchat-send{flex:none;width:48px;height:48px;padding:0;border:0;border-radius:50%;background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;flex-direction:column;line-height:1.3;transition:opacity .12s,transform .12s}
[data-theme="dark"] .hchat-send{color:#101219}
.hchat-send:active{transform:scale(.95)}
.hchat-send .hchat-svg{width:22px;height:22px;transform:scaleX(-1)}
.hchat-send:disabled{opacity:.4}
.hchat-send b{font-size:14px;font-weight:800}
.hchat-send small{font-size:12px;font-weight:600;opacity:.92}
.hchat-send.hchat-send-paid{width:auto;min-width:104px;padding:0 16px;border-radius:24px}
.hchat-count{display:block;font-size:12px;color:var(--dim);text-align:end;padding:0 6px 2px}

/* --- کارت تأیید و کارت پول (همان سبک) --- */
.hchat-confirm,.hchat-credit{margin:0 0 10px;padding:14px;border-radius:18px;background:var(--paper);border:1.5px solid var(--accent-line);box-shadow:0 -2px 14px rgba(20,26,46,.07);color:var(--ink);font-size:14.5px;line-height:1.9;animation:hchat-in .2s ease-out both}
.hchat-card-h{display:flex;gap:10px;align-items:flex-start}
.hchat-card-ic{flex:none;width:36px;height:36px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}
.hchat-card-t{font-weight:800;font-size:15px;line-height:1.8;margin:0}
.hchat-card-s{margin:2px 0 0;font-size:13.5px;color:var(--dim);line-height:1.85}
.hchat-held{margin:10px 0 0;padding:7px 12px;border-radius:10px;background:var(--muted-bg);border-inline-start:3px solid var(--accent-line);font-size:13.5px;color:var(--dim);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.hchat-confirm-row{display:flex;gap:8px;margin-top:12px}
.hchat-confirm-row .hchat-pay{flex:1;font-size:14.5px;line-height:1.5;padding:6px 12px}
.hchat-ghost{min-width:64px;border:1px solid var(--line);background:none;color:var(--ink)}
.hchat-credit .hchat-pay{display:block;width:100%;margin-top:12px}
.hchat-credit .hchat-after{margin:8px 0 0;font-size:12.5px;color:var(--dim);text-align:center}

/* --- دکمهٔ چسبان بالا-راست (روی صفحهٔ جزوه، نه توی تبِ بپرس) --- */
.hchat-fab{position:fixed;top:calc(var(--hub-top,56px) + 8px);right:10px;z-index:60;display:inline-flex;align-items:center;gap:3px;height:26px;padding:0 6px 0 5px;border:0;border-radius:999px;background:var(--accent);color:#fff;font:inherit;font-size:12px;font-weight:700;box-shadow:0 3px 10px rgba(0,0,0,.18);-webkit-tap-highlight-color:transparent}
[data-theme="dark"] .hchat-fab{color:#101219}
.hchat-fab::after{content:"";position:absolute;inset:-10px -8px}
.hchat-fab[hidden]{display:none}
.hchat-fab:active{transform:scale(.97)}
.hchat-fab .hchat-svg,.hchat-fab-ic{width:13px;height:13px;flex:none;fill:currentColor;stroke:none}
.hchat-fab-beta{background:#facc15;color:#422006;font-size:9px;font-weight:800;line-height:1;padding:2px 4px;border-radius:999px}
.hchat-fab{transition:opacity .2s,transform .2s,visibility 0s}
.hchat-fab.gone{opacity:0;transform:translateY(-6px);pointer-events:none;visibility:hidden;transition:opacity .2s,transform .2s,visibility 0s .2s}
.hchat-fab.gone::after{display:none}

@media (prefers-reduced-motion:reduce){.hchat *{animation:none!important;transition:none!important}}

.hchat-empty[hidden],.hchat-rule[hidden],.hchat-form[hidden],.hchat-credit[hidden],.hchat-confirm[hidden],.hchat-quota[hidden],.hchat-count[hidden],.hchat-count:empty{display:none}
.hchat-empty .hchat-credit{margin:14px 0 0;text-align:start}
.hchat-confirm p,.hchat-credit p{margin:0}
.hchat-confirm .hchat-card-s,.hchat-credit .hchat-card-s{margin:2px 0 0}
.hchat-pay{cursor:pointer}