@font-face{
  font-family:'Vazirmatn';
  src:url('/fonts/Vazirmatn.woff2') format('woff2-variations');
  font-weight:100 900; font-style:normal; font-display:swap;
}

:root{
  --bg:#FAF9F7; --surface:#FFFFFF; --surface-2:#F2F0EC;
  --text:#1A1A19; --muted:#6C6A66; --faint:#97948E;
  --border:#E7E4DE; --border-strong:#D6D2CA;
  --brand:#C51319; --brand-ink:#FFFFFF; --brand-soft:#FBEDED;
  --accent:#00A9BC;
  --bubble:#EFEDE8;
  --shadow:0 1px 2px rgba(20,18,14,.05), 0 8px 24px rgba(20,18,14,.06);
  --radius:18px;
  --safe-b:env(safe-area-inset-bottom,0px);
  --safe-t:env(safe-area-inset-top,0px);
}
html[data-theme="dark"]{
  --bg:#141413; --surface:#1D1D1B; --surface-2:#262623;
  --text:#ECEAE5; --muted:#A3A09A; --faint:#7C7974;
  --border:#2F2F2C; --border-strong:#3D3D39;
  --brand:#F04248; --brand-ink:#1A0406; --brand-soft:#2A1416;
  --accent:#28C8DB;
  --bubble:#2A2A27;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.28);
}
@media (prefers-color-scheme:dark){
  html:not([data-theme="light"]){
    --bg:#141413; --surface:#1D1D1B; --surface-2:#262623;
    --text:#ECEAE5; --muted:#A3A09A; --faint:#7C7974;
    --border:#2F2F2C; --border-strong:#3D3D39;
    --brand:#F04248; --brand-ink:#1A0406; --brand-soft:#2A1416;
    --accent:#28C8DB;
    --bubble:#2A2A27;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.28);
  }
}

*{box-sizing:border-box; -webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:'Vazirmatn',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:15px; line-height:1.75; overscroll-behavior-y:none;
  -webkit-font-smoothing:antialiased;
}
button,input,textarea{font:inherit; color:inherit}
button{background:none;border:0;cursor:pointer;padding:0}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;display:block}
[hidden]{display:none !important}

/* ── ورود ───────────────────────────────────────────────────────────────── */
.login{position:fixed;inset:0;display:grid;place-items:center;padding:24px;background:var(--bg);overflow:auto}
.login-card{width:100%;max-width:360px;text-align:center;padding:16px 0}
.login-logo{width:210px;max-width:64vw;height:auto;margin:0 auto 26px;display:block}
.login-title{margin:0 0 4px;font-size:22px;font-weight:700;letter-spacing:-.01em}
.login-sub{margin:0 0 26px;color:var(--muted);font-size:13.5px}
.field{display:block;text-align:right;margin-bottom:14px}
.field span{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.field input{
  width:100%;padding:13px 15px;border-radius:13px;background:var(--surface);
  border:1px solid var(--border);outline:0;transition:border-color .15s, box-shadow .15s;
}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.btn-primary{
  width:100%;padding:14px;border-radius:13px;background:var(--brand);color:#fff;
  font-weight:600;margin-top:6px;transition:opacity .15s, transform .06s;
}
.btn-primary:active{transform:scale(.99)}
.btn-primary[disabled]{opacity:.55}
.login-err{color:var(--brand);font-size:13px;margin:2px 0 10px}
.apk-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:22px;padding:9px 16px;border-radius:11px;
  border:1px solid var(--border);color:var(--muted);font-size:13px;text-decoration:none;background:var(--surface);
}
.apk-link svg{width:16px;height:16px}
.apk-link:active{border-color:var(--border-strong)}
a.ghost{text-decoration:none}
.powered{margin-top:22px;color:var(--faint);font-size:11.5px}
.powered b{color:var(--muted);font-weight:600}

/* ── چیدمان اپ ──────────────────────────────────────────────────────────── */
.app{display:flex;flex-direction:column;height:100dvh}
.topbar{
  display:flex;align-items:center;gap:8px;padding:calc(var(--safe-t) + 8px) 10px 8px;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent; position:sticky;top:0;z-index:20;
}
.topbar.scrolled{border-bottom-color:var(--border)}
.icon-btn{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;color:var(--muted)}
.icon-btn:active{background:var(--surface-2)}
.mode-chip{
  flex:1;min-width:0;display:flex;align-items:center;justify-content:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--text);padding:7px 12px;border-radius:999px;
  border:1px solid transparent;transition:background .18s, color .18s, border-color .18s;
}
.mode-chip:active{background:var(--surface-2)}
.mode-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mode-chip .chip-ic{width:18px;height:18px;flex:none;color:var(--muted);transition:color .18s}
.mode-chip.on{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}
.mode-chip.on .chip-ic,.mode-chip.on .caret{color:var(--brand)}
.caret{width:15px;height:15px;color:var(--faint);flex:none;transition:color .18s}
.caret.sm{width:13px;height:13px}

.scroll{flex:1;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;padding:0 14px}
.thread{max-width:720px;margin:0 auto;padding:6px 0 18px}

/* ── حالت خالی ──────────────────────────────────────────────────────────── */
.empty{
  min-height:58vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;gap:2px;padding:20px 0 10px;
}
.empty-logo{width:140px;opacity:.9;margin-bottom:18px}
.empty h2{margin:0;font-size:25px;font-weight:700;letter-spacing:-.02em}
.empty p{margin:2px 0 22px;color:var(--muted);font-size:14.5px}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;max-width:520px}
.chip{
  padding:9px 14px;border-radius:999px;border:1px solid var(--border);
  background:var(--surface);font-size:13px;color:var(--text);box-shadow:var(--shadow);
  transition:transform .08s, border-color .15s;
}
.chip:active{transform:scale(.97);border-color:var(--border-strong)}

/* ── پیام‌ها ────────────────────────────────────────────────────────────── */
.msg{margin:18px 0;animation:rise .25s ease both}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.user{display:flex;justify-content:flex-start}
.msg.user .body{
  background:var(--bubble);border-radius:20px 20px 20px 6px;padding:11px 15px;
  max-width:86%;white-space:pre-wrap;word-break:break-word;
}
.msg.bot .body{max-width:100%;word-break:break-word}
.msg .imgs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.msg .imgs img{width:92px;height:92px;object-fit:cover;border-radius:12px;border:1px solid var(--border)}

.body h1,.body h2,.body h3{font-size:16.5px;font-weight:700;margin:18px 0 6px;letter-spacing:-.01em}
.body p{margin:0 0 11px}
.body ul,.body ol{margin:0 0 11px;padding-inline-start:20px}
.body li{margin:3px 0}
.body a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.body code{
  background:var(--surface-2);padding:1.5px 5px;border-radius:6px;font-size:.88em;
  font-family:ui-monospace,'SF Mono',Menlo,monospace;direction:ltr;display:inline-block;
}
.body pre{
  background:var(--surface-2);border:1px solid var(--border);border-radius:13px;
  padding:13px 14px;overflow-x:auto;direction:ltr;text-align:left;margin:0 0 12px;
}
.body pre code{background:none;padding:0;font-size:12.5px;line-height:1.65}
.body blockquote{border-inline-start:3px solid var(--border-strong);margin:0 0 11px;padding:2px 12px;color:var(--muted)}
.body table{border-collapse:collapse;width:100%;margin:0 0 12px;font-size:13.5px;display:block;overflow-x:auto}
.body th,.body td{border:1px solid var(--border);padding:7px 10px;text-align:right}
.body th{background:var(--surface-2);font-weight:600}
.body hr{border:0;border-top:1px solid var(--border);margin:16px 0}

.media{margin-top:4px}
.media img,.media video{
  width:100%;max-width:440px;border-radius:16px;border:1px solid var(--border);display:block;
}
.media audio{width:100%;max-width:440px;margin-top:4px}
.media-actions{display:flex;gap:8px;margin-top:8px}
.media-actions a{
  font-size:12.5px;color:var(--muted);border:1px solid var(--border);
  padding:6px 12px;border-radius:9px;text-decoration:none;background:var(--surface);
}

.pending{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13.5px}
.dots{display:inline-flex;gap:4px}
.dots i{width:6px;height:6px;border-radius:50%;background:var(--faint);animation:blink 1.3s infinite}
.dots i:nth-child(2){animation-delay:.18s}
.dots i:nth-child(3){animation-delay:.36s}
@keyframes blink{0%,60%,100%{opacity:.25}30%{opacity:1}}
.err-note{color:var(--brand);font-size:13.5px;background:var(--brand-soft);padding:10px 13px;border-radius:12px}

.cursor::after{
  content:'';display:inline-block;width:7px;height:15px;background:var(--text);
  vertical-align:-2px;margin-inline-start:2px;animation:caret 1s steps(2) infinite;border-radius:1px;
}
@keyframes caret{50%{opacity:0}}

/* ── نوشتن پیام ─────────────────────────────────────────────────────────── */
.composer-wrap{padding:0 12px calc(var(--safe-b) + 10px);background:linear-gradient(to top,var(--bg) 62%,transparent)}
.attach-row{display:flex;gap:8px;max-width:720px;margin:0 auto 8px;flex-wrap:wrap;align-items:center}
.attach-label{width:100%;font-size:11.5px;color:var(--faint);margin-bottom:-2px}
.attach-thumb{position:relative;width:62px;height:62px;border-radius:12px;overflow:hidden;border:1px solid var(--border);background:var(--surface-2)}
.attach-thumb img{width:100%;height:100%;object-fit:cover;transition:opacity .2s}
.attach-thumb.busy img{opacity:.3}
.attach-thumb .prog{
  position:absolute;inset:0;display:grid;place-items:center;
  font-size:12.5px;font-weight:700;color:#fff;background:rgba(0,0,0,.5);
  font-variant-numeric:tabular-nums;
}
.attach-thumb .bar{position:absolute;inset-inline:0;bottom:0;height:3px;background:rgba(255,255,255,.28)}
.attach-thumb .bar i{display:block;height:100%;background:var(--brand);transition:width .15s linear}
.attach-thumb button{
  position:absolute;top:3px;inset-inline-end:3px;width:20px;height:20px;border-radius:50%;
  background:rgba(0,0,0,.62);color:#fff;display:grid;place-items:center;font-size:13px;line-height:1;
}
.composer{
  max-width:720px;margin:0 auto;background:var(--surface);border:1px solid var(--border);
  border-radius:24px;box-shadow:var(--shadow);padding:6px 8px 6px;transition:border-color .15s;
}
.composer:focus-within{border-color:var(--border-strong)}
.composer textarea{
  width:100%;border:0;outline:0;resize:none;background:none;padding:9px 8px 2px;
  min-height:44px;max-height:38vh;line-height:1.7;overflow-y:auto;
}
.composer textarea::placeholder{color:var(--faint)}
.composer-bar{display:flex;align-items:center;gap:6px;padding:2px 2px 2px}
.spacer{flex:1}
.pill{
  display:flex;align-items:center;gap:5px;height:34px;padding:0 10px;border-radius:999px;
  color:var(--muted);font-size:12.5px;border:1px solid transparent;
}
.pill:active{background:var(--surface-2)}
.pill.model{border-color:var(--border);max-width:min(58vw,260px)}
.pill.model span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pill svg{width:18px;height:18px}
.send{
  width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;
  display:grid;place-items:center;transition:opacity .15s, transform .08s;
}
.send:active{transform:scale(.93)}
.send[disabled]{opacity:.3}
.send.stop svg{stroke-width:0;fill:currentColor}

/* ── کشو ────────────────────────────────────────────────────────────────── */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:40;animation:fade .2s both}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes fade-out{from{opacity:1}to{opacity:0}}
@keyframes slide-out{from{transform:none}to{transform:translateX(100%)}}
@keyframes sheet-out{from{transform:none}to{transform:translateY(100%)}}
/* بسته شدن هم مثل باز شدن انیمیت می‌شود تا پرش نداشته باشد */
.scrim.closing{animation:fade-out .2s ease both}
.drawer.closing{animation:slide-out .22s cubic-bezier(.4,0,1,1) both}
.sheet.closing{animation:sheet-out .22s cubic-bezier(.4,0,1,1) both}
.viewer{animation:fade .18s both}
.viewer.closing{animation:fade-out .18s ease both}
.login,.app{animation:fade .24s ease both}
@media (prefers-reduced-motion:reduce){
  .drawer,.sheet,.scrim,.viewer,.msg,.login,.app{animation-duration:.01ms !important}
}
.drawer{
  position:fixed;top:0;bottom:0;right:0;width:min(84vw,320px);z-index:50;
  background:var(--surface);border-left:1px solid var(--border);
  display:flex;flex-direction:column;padding:calc(var(--safe-t) + 14px) 12px calc(var(--safe-b) + 12px);
  animation:slide .22s cubic-bezier(.2,.8,.3,1) both;
}
@keyframes slide{from{transform:translateX(100%)}to{transform:none}}
.drawer-top{padding:2px 6px 14px}
.drawer-logo{width:135px;height:auto;display:block}
.drawer-new{
  display:flex;align-items:center;gap:8px;width:100%;padding:11px 12px;border-radius:13px;
  background:var(--surface-2);font-size:14px;font-weight:600;margin-bottom:10px;
}
.drawer-list{flex:1;overflow-y:auto;margin:0 -4px}
.drawer-list .day{font-size:11.5px;color:var(--faint);padding:12px 10px 5px}
.chat-item{
  display:flex;align-items:center;gap:6px;width:100%;padding:9px 10px;border-radius:11px;
  font-size:13.5px;color:var(--text);text-align:right;
}
.chat-item:active,.chat-item.on{background:var(--surface-2)}
.chat-item span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat-item .x{width:26px;height:26px;border-radius:7px;display:grid;place-items:center;color:var(--faint);opacity:.6}
.chat-item .x svg{width:15px;height:15px}
.drawer-foot{border-top:1px solid var(--border);padding-top:10px;margin-top:6px}
.who{padding:2px 10px 10px}
.who span{display:block;font-size:14px;font-weight:600}
.who small{color:var(--faint);font-size:11.5px;direction:ltr;display:block}
.ghost{display:block;width:100%;text-align:right;padding:9px 10px;border-radius:10px;font-size:13.5px;color:var(--muted)}
.ghost:active{background:var(--surface-2)}
.ghost.danger{color:var(--brand)}

/* ── شیت پایین ──────────────────────────────────────────────────────────── */
.sheet{
  position:fixed;inset-inline:0;bottom:0;z-index:50;background:var(--surface);
  border-radius:22px 22px 0 0;padding:8px 14px calc(var(--safe-b) + 14px);
  max-height:78dvh;display:flex;flex-direction:column;
  box-shadow:0 -8px 40px rgba(0,0,0,.18);
  animation:up .24s cubic-bezier(.2,.8,.3,1) both;
}
@keyframes up{from{transform:translateY(100%)}to{transform:none}}
.sheet.tall{height:78dvh}
.sheet-grip{width:36px;height:4px;border-radius:2px;background:var(--border-strong);margin:4px auto 10px;flex:none}
.sheet .count{color:var(--faint);font-size:11.5px;margin:-8px 2px 10px;flex:none}
.sheet h3{margin:0 0 12px;font-size:16px;font-weight:700;padding-inline:2px}
.search{
  width:100%;padding:11px 14px;border-radius:12px;background:var(--surface-2);
  border:1px solid var(--border);outline:0;margin-bottom:10px;flex:none;font-size:14px;
}
.search:focus{border-color:var(--border-strong)}
.mode-list{display:grid;gap:6px;overflow-y:auto}
.mode-row{
  display:flex;align-items:center;gap:12px;padding:12px;border-radius:14px;text-align:right;width:100%;
}
.mode-row:active{background:var(--surface-2)}
.mode-row.on{background:var(--brand-soft)}
.mode-row .ic{
  width:38px;height:38px;border-radius:11px;background:var(--surface-2);
  display:grid;place-items:center;color:var(--brand);flex:none;
}
.mode-row.on .ic{background:var(--brand);color:#fff}
.mode-row b{display:block;font-size:14px;font-weight:600}
.mode-row small{color:var(--muted);font-size:12px}
.mode-row .cur{font-size:11px;color:var(--faint);white-space:nowrap;margin-inline-start:auto}

.model-list{overflow-y:auto;margin:0 -6px;flex:1}
.model-list .grp{font-size:11.5px;color:var(--faint);padding:12px 12px 5px}
.model-row{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;border-radius:12px;text-align:right}
.model-row:active,.model-row.on{background:var(--surface-2)}
.model-row .t{flex:1;min-width:0}
.model-row b{display:block;font-size:13.8px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.model-row small{color:var(--muted);font-size:11.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block}
.model-row .tick{color:var(--brand);flex:none;opacity:0}
.model-row.on .tick{opacity:1}
.badge{font-size:10px;padding:2px 6px;border-radius:6px;background:var(--surface-2);color:var(--muted);flex:none}
.badge.free{color:#0a7d3f;background:#E7F6EE}
html[data-theme="dark"] .badge.free{color:#5FD99A;background:#15301F}

.switch-row{
  display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:13px;
  background:var(--surface-2);margin-bottom:10px;flex:none;cursor:pointer;
}
.switch-row span{flex:1;font-size:14px}
.switch-row input{position:absolute;opacity:0;pointer-events:none}
.switch-row .sw{
  width:42px;height:25px;border-radius:999px;background:var(--border-strong);
  position:relative;transition:background .2s;flex:none;
}
.switch-row .sw::after{
  content:'';position:absolute;top:3px;inset-inline-start:3px;width:19px;height:19px;
  border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.25);
}
.switch-row input:checked ~ .sw{background:var(--brand)}
.switch-row input:checked ~ .sw::after{transform:translateX(-17px)}
.mem-add{display:flex;gap:8px;margin-bottom:10px;flex:none}
.mem-add .search{margin:0;flex:1}
.mem-btn{
  padding:0 16px;border-radius:12px;background:var(--brand);color:#fff;
  font-size:13.5px;font-weight:600;flex:none;
}
.mem-list{overflow-y:auto;flex:1;margin:0 -4px 10px}
.mem-item{
  display:flex;align-items:flex-start;gap:8px;padding:10px 12px;border-radius:12px;font-size:13.5px;
}
.mem-item:nth-child(odd){background:var(--surface-2)}
.mem-item p{margin:0;flex:1;line-height:1.7}
.mem-item .tag{font-size:10px;color:var(--faint);flex:none;margin-top:4px}
.mem-item button{width:26px;height:26px;border-radius:8px;color:var(--faint);display:grid;place-items:center;flex:none}
.mem-item button svg{width:15px;height:15px}
.mem-empty{color:var(--faint);font-size:13px;text-align:center;padding:26px 10px}

.viewer{position:fixed;inset:0;z-index:70;background:rgba(0,0,0,.92);display:grid;place-items:center;padding:16px}
.viewer img{max-width:100%;max-height:100%;border-radius:10px}

.toast{
  position:fixed;bottom:calc(var(--safe-b) + 90px);inset-inline:0;margin:auto;width:max-content;max-width:88vw;
  background:var(--text);color:var(--bg);padding:9px 16px;border-radius:999px;font-size:13px;z-index:80;
  animation:fade .18s both;
}

@media (min-width:760px){
  .scroll{padding:0 24px}
  .composer-wrap{padding-bottom:18px}
}