:root{
  --bg:#0e1117;
  --sb:#141920;
  --surface:#1c2333;
  --s2:#242d3e;
  --border:#2a3347;
  --bm:#1e4d78;
  --bm2:#163a5e;
  --bo:#1c2333;
  --acc:#4da8da;
  --acc2:#6ec6f0;
  --adim:rgba(77,168,218,.12);
  --grn:#4caf7d;
  --red:#e05252;
  --amb:#f0a500;
  --txt:#e2e8f0;
  --dim:#8899b0;
  --faint:#4a566a;
  --sbw:310px;
  --hh:54px;
  --font:"Segoe UI","SF Pro Text",system-ui,sans-serif;
  --sbi:env(safe-area-inset-bottom,0px);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:var(--bg);color:var(--txt);font-family:var(--font)}
body{overflow:hidden;-webkit-tap-highlight-color:transparent}
button,input,textarea{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer}
a{text-decoration:none;color:inherit}
img,video{display:block;max-width:100%}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:999px}

#auth{display:none;position:fixed;inset:0;place-items:center;padding:20px 16px;overflow:auto;z-index:300;background:var(--bg)}
#auth.on{display:grid}
.acard,.modal{width:min(420px,100%);background:var(--sb);border:1px solid var(--border);border-radius:18px}
.acard{padding:32px 26px}
.alogo{font-size:1.7rem;font-weight:900;color:var(--acc);margin-bottom:4px}
.asub{font-size:.84rem;color:var(--dim);margin-bottom:20px}
.atabs{display:flex;gap:4px;padding:4px;border-radius:12px;background:var(--surface);margin-bottom:20px}
.atab{flex:1;padding:10px;border-radius:8px;color:var(--dim);font-weight:600}
.atab.on{background:var(--s2);color:var(--txt)}
.afield{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.afield label,.msec-title,.tog-label,.tog-sub,.ch-sub,.cit,.aerr,.merr,.sfh,.fbs,.fqsize,.once-sub,.mtime,.es-s{font-size:.75rem}
.afield label,.msec-title,.tog-label{color:var(--dim);font-weight:600}
.ainput,.minput,#msginput{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:11px 13px;outline:none}
.ainput:focus,.minput:focus,#msginput:focus{border-color:var(--acc)}
.aerr,.merr{color:var(--red);min-height:18px;line-height:1.4}
.abtn,.mbtn{width:100%;padding:12px 14px;border-radius:12px;font-weight:700}
.abtn,.mbtn{background:var(--acc);color:#fff}
.mbtn.sec{background:var(--surface);color:var(--txt);border:1px solid var(--border)}
.mbtn.danger{background:var(--red)}

#app{display:none;height:100vh;width:100vw}
#app.on{display:flex}
#sb{width:var(--sbw);background:var(--sb);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}
.sbh,.sbfoot,#ch{display:flex;align-items:center;gap:10px;padding:0 14px;height:var(--hh);flex-shrink:0}
.sbh,#ch{border-bottom:1px solid var(--border)}
.sblogo{font-weight:800}
.sbsearch{padding:12px;border-bottom:1px solid var(--border)}
.swrap{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:10px 12px}
.swrap svg{width:16px;height:16px;color:var(--dim);flex-shrink:0}
#sinput{flex:1;background:none;border:0;outline:none}
#sres{display:none;padding:0 12px 12px}
#sres.on{display:block}
.sri,.ci{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;cursor:pointer}
.sri:hover,.ci:hover,.ci.on{background:var(--surface)}
#clist{flex:1;overflow:auto;padding:12px}
.noc{color:var(--dim);text-align:center;padding:24px 10px;line-height:1.6}
.cin{flex:1;min-width:0}
.cin-name,.ch-name,.mh-title,.sfn{font-weight:700}
.cin-prev,.pb-inner,.fqname,.once-label,.fbn{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cin-prev,.sfh,.cit{color:var(--dim)}
.cim{text-align:right;display:flex;flex-direction:column;align-items:flex-end;gap:6px}
.badge{min-width:21px;height:21px;padding:0 6px;border-radius:999px;background:var(--acc);color:#fff;font-size:.72rem;display:grid;place-items:center}
.sbfoot{border-top:1px solid var(--border);cursor:pointer}

.av{display:grid;place-items:center;border-radius:50%;background:var(--surface);border:1px solid var(--border);overflow:hidden;font-weight:800;flex-shrink:0}
.av img{width:100%;height:100%;object-fit:cover}
.av28{width:28px;height:28px;font-size:.75rem}
.av34{width:34px;height:34px;font-size:.9rem}
.av46{width:46px;height:46px;font-size:1.05rem}
.av-saved{background:var(--bm2);color:#d4e9ff}
.av-online{box-shadow:0 0 0 2px var(--grn) inset}
.av-online-sm{box-shadow:0 0 0 1px var(--grn) inset}

#ca{flex:1;min-width:0;display:flex;flex-direction:column;position:relative}
#es{flex:1;display:grid;place-items:center;color:var(--faint);text-align:center;padding:24px}
.es-ico{font-size:2.8rem;margin-bottom:12px;opacity:.35}
.es-t{font-size:1rem;font-weight:700;margin-bottom:6px}
#open-sb-btn,.ibtn,.btn-back,.attbtn,.sndbtn,.rbtn,.pb-close,.fqrm{display:grid;place-items:center}
#open-sb-btn,.ibtn,.btn-back,.attbtn,.sndbtn{width:36px;height:36px;border-radius:50%}
#open-sb-btn,.ibtn,.btn-back,.attbtn{background:var(--surface);border:1px solid var(--border);color:var(--dim)}
#open-sb-btn{display:none;position:absolute;top:12px;left:12px;z-index:5}
#open-sb-btn svg,.btn-back svg,.ibtn svg{width:18px;height:18px}
#ch{display:none;background:var(--sb)}
#ch.on{display:flex}
.chinfo{flex:1;min-width:0;cursor:pointer}
#pinbar{display:none;padding:6px 14px;background:var(--surface);border-bottom:1px solid var(--border);cursor:pointer}
#pinbar.on{display:block}
.pb-inner{display:flex;align-items:center;gap:8px;color:var(--dim)}
.pb-inner svg{width:13px;height:13px;color:var(--acc);flex-shrink:0}
.pb-text{flex:1;color:var(--txt);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pb-close{width:24px;height:24px;color:var(--faint)}

#msgs{display:none;flex:1;overflow:auto;padding:12px 12px 8px;flex-direction:column;gap:4px}
.load-more{align-self:center;margin:4px 0 8px;padding:7px 12px;border-radius:999px;background:var(--surface);border:1px solid var(--border);color:var(--dim);font-size:.74rem;font-weight:700}
.load-more:hover{border-color:var(--acc);color:var(--txt)}
.dsep{display:flex;align-items:center;gap:8px;color:var(--faint);font-size:.66rem;font-weight:700;text-transform:uppercase;margin:8px 0 4px}
.dsep::before,.dsep::after{content:"";height:1px;flex:1;background:var(--border)}
.mrow{position:relative;display:flex;flex-direction:column;max-width:72%;gap:2px}
.mrow.me{align-self:flex-end;align-items:flex-end}
.mrow.ot{align-self:flex-start;align-items:flex-start}
.bub,.fbub,.once-bub{border-radius:16px;max-width:100%}
.bub{padding:9px 12px;font-size:.88rem;line-height:1.5;white-space:pre-wrap;word-break:break-word}
.mrow.me .bub{background:var(--bm);border-bottom-right-radius:5px;color:#d4e9ff}
.mrow.ot .bub{background:var(--bo);border-bottom-left-radius:5px}
.bub.rtl{direction:rtl;text-align:right}
.bub.muted{color:var(--dim);font-style:italic;background:var(--surface)!important}
.mmeta{display:flex;align-items:center;gap:4px;padding:0 2px}
.mtime{color:var(--faint)}
.tick{font-size:.75rem;letter-spacing:-2px}
.tick.s{color:var(--faint)}
.tick.d{color:var(--dim)}
.tick.r{color:var(--acc)}

.fbub,.once-bub{display:flex;align-items:center;gap:9px;padding:10px 12px}
.voice-bub{display:flex;flex-direction:column;gap:7px;min-width:220px;padding:10px 12px;border-radius:16px;background:var(--s2)}
.mrow.me .voice-bub{background:var(--bm2);color:#d4e9ff}
.voice-bub span{font-size:.76rem;font-weight:700;color:var(--dim)}
.voice-bub audio{width:220px;height:34px}
.mrow.me .fbub,.mrow.me .once-bub{background:var(--bm2);color:#d4e9ff}
.mrow.ot .fbub,.mrow.ot .once-bub{background:var(--s2)}
.fbn,.once-label{font-weight:700;font-size:.82rem}
.once-bub{border:1px solid var(--border);max-width:220px}
.once-ico,.fbi{font-size:1.4rem;flex-shrink:0}
.once-viewed{opacity:.45;cursor:default;pointer-events:none}
.once-bub:not(.once-viewed){backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.imgp{max-width:240px;max-height:200px;border-radius:12px;object-fit:cover;cursor:pointer}

.rbtn{opacity:0;position:absolute;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:var(--surface);border:1px solid var(--border);z-index:4}
.mrow.me .rbtn{left:-31px}
.mrow.ot .rbtn{right:-31px}
.mrow:hover .rbtn{opacity:1}
.epick,.ctxm{display:none;position:absolute;background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:0 16px 40px rgba(0,0,0,.35);z-index:60}
.epick.on,.ctxm.on{display:block}
.mrow.me .epick,.mrow.me .ctxm{right:0}
.mrow.ot .epick,.mrow.ot .ctxm{left:0}
.epick{padding:8px;width:284px}
.epg{display:grid;grid-template-columns:repeat(8,1fr);gap:2px}
.ep{padding:6px;border-radius:8px;font-size:1rem}
.ep:hover,.ctxi:hover{background:var(--s2)}
.ctxi{display:flex;align-items:center;gap:8px;padding:10px 13px;white-space:nowrap}
.ctxi svg{width:14px;height:14px;color:var(--dim);flex-shrink:0}
.ctxsep{height:1px;background:var(--border)}
.rbar{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}
.reply-quote,.fwd{max-width:100%;font-size:.72rem;color:var(--dim)}
.reply-quote{border-left:3px solid var(--acc);padding:5px 8px;margin-bottom:2px;background:rgba(255,255,255,.035);border-radius:8px;cursor:pointer}
.reply-quote div{font-weight:800;color:var(--acc);margin-bottom:2px}
.reply-quote span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fwd{font-weight:700;margin:0 4px 2px}
.mrow.pulse .bub,.mrow.pulse .fbub,.mrow.pulse .once-bub,.mrow.pulse .voice-bub{outline:2px solid var(--acc)}
.rchip{display:flex;align-items:center;gap:4px;padding:3px 8px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-size:.73rem}
.rchip.mine{border-color:var(--acc);background:var(--adim)}
.rcount{font-size:.67rem;color:var(--dim)}

#ibar{display:none;position:relative;padding:8px 12px calc(8px + var(--sbi));border-top:1px solid var(--border);background:var(--sb)}
#ibar.on{display:block}
#fqueue{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:6px}
.fqi{display:flex;align-items:center;gap:6px;max-width:190px;padding:5px 7px;border-radius:10px;background:var(--surface);border:1px solid var(--border)}
.fqthumb,.fqicon{width:28px;height:28px;border-radius:6px;flex-shrink:0}
.fqthumb{object-fit:cover}
.fqicon{display:grid;place-items:center;background:var(--s2)}
.fqname{display:block;font-size:.7rem;font-weight:700}
.fqsize{color:var(--dim)}
.fqrm{width:22px;height:22px;color:var(--faint)}
.once-toggle{display:flex;align-items:center;gap:8px;margin-bottom:6px;color:var(--dim);font-size:.76rem}
.once-toggle input{display:none}
.once-toggle-track{position:relative;width:30px;height:18px;border-radius:999px;background:var(--border);flex-shrink:0}
.once-toggle-track::after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:transform .18s}
.once-toggle input:checked + .once-toggle-track{background:var(--amb)}
.once-toggle input:checked + .once-toggle-track::after{transform:translateX(12px)}
#uprog{display:none;margin-bottom:7px}
#replybar{display:none;align-items:center;justify-content:space-between;gap:10px;margin-bottom:7px;padding:8px 10px;border-radius:12px;background:var(--surface);border-left:3px solid var(--acc)}
#replybar.on{display:flex}
.reply-k{font-size:.7rem;color:var(--acc);font-weight:800;margin-bottom:2px}
.reply-t{font-size:.78rem;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:min(520px,70vw)}
.uph{display:flex;justify-content:space-between;margin-bottom:4px;font-size:.72rem;color:var(--dim)}
.upt{height:4px;border-radius:999px;background:var(--border);overflow:hidden}
.upbar{height:100%;width:0;background:linear-gradient(90deg,var(--acc),var(--acc2));border-radius:999px}
.upbar.done{background:var(--grn)}
#dropov{display:none;position:absolute;inset:0;place-items:center;background:var(--adim);border:2px dashed var(--acc);border-radius:12px;pointer-events:none;z-index:20}
#dropov.on{display:grid}
.dropinn{display:flex;flex-direction:column;align-items:center;gap:6px;color:var(--acc);font-weight:700}
.irow{display:flex;align-items:flex-end;gap:8px}
.attbtn.has{border-color:var(--acc);color:var(--acc)}
.attbtn.rec{border-color:var(--red);color:#fff;background:var(--red)}
.attbtn svg{width:16px;height:16px}
#msginput{flex:1;min-height:36px;max-height:108px;resize:none;border-radius:20px;line-height:1.5}
.sndbtn{background:var(--acc);color:#fff}
.sndbtn svg{width:16px;height:16px;fill:#fff}
.sndbtn:disabled{opacity:.4}

.moverlay{display:none;position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.45);padding:20px 14px;overflow:auto}
.moverlay.on{display:grid;place-items:center}
.modal{overflow:hidden}
.mh{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}
.mb{padding:16px}
.msec{display:flex;flex-direction:column;gap:10px;margin-bottom:14px}
.ph-wrap{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.ph-upload{padding:9px 12px;border-radius:10px;background:var(--surface);border:1px solid var(--border);cursor:pointer}
.ph-upload input{display:none}
.tog-row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.tog{display:flex;align-items:center}
.tog input{display:none}
.tog-track{position:relative;width:36px;height:20px;border-radius:999px;background:var(--border)}
.tog-track::after{content:"";position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:#fff;transition:transform .18s}
.tog input:checked + .tog-track{background:var(--acc)}
.tog input:checked + .tog-track::after{transform:translateX(16px)}
.talk-card{max-width:340px}
.talk-status{text-align:center;color:var(--dim);font-weight:700;padding:18px 0 20px}
.talk-actions{display:flex;gap:8px}
.talk-actions .mbtn{margin:0}

#lb{display:none;position:fixed;inset:0;place-items:center;background:rgba(0,0,0,.86);z-index:999;padding:24px}
#lb.on{display:grid}
#lb-img,#lb-video{max-width:92vw;max-height:88vh;border-radius:12px;box-shadow:0 20px 80px rgba(0,0,0,.6)}
#lb-video{background:#000}
#lbx{position:absolute;top:14px;right:18px;font-size:2rem;color:#fff}

#toast{position:fixed;top:14px;left:50%;transform:translateX(-50%) translateY(-80px);padding:8px 16px;border-radius:999px;background:var(--red);color:#fff;font-size:.8rem;font-weight:700;z-index:500;transition:transform .3s ease}
#toast.on{transform:translateX(-50%) translateY(0)}
#sboverlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:9}
#sboverlay.on{display:block}
.cdot{width:10px;height:10px;border-radius:50%;background:var(--faint)}
.cdot.on{background:var(--grn)}
.cdot.off{background:var(--red)}

@media (max-width:680px){
  :root{--sbw:88vw}
  #sb{position:fixed;inset:0 auto 0 0;height:100%;transform:translateX(-100%);transition:transform .25s ease;z-index:10}
  #sb.on{transform:translateX(0)}
  #open-sb-btn,.btn-back{display:grid}
  .mrow{max-width:86%}
  #msgs{padding:10px 9px 6px}
  #ibar{padding:6px 9px calc(6px + var(--sbi))}
  .rbtn{display:none}
  .epick{width:min(284px,calc(100vw - 24px))}
}