:root{
  --bg:#f5f4ef;--bg-sb:#ede9e0;--bg-comp:#fff;
  --bg-user:#e8e4da;--bg-hover:#e2ddd5;--bg-input:#faf9f5;
  --bdr:rgba(0,0,0,.08);--bdr2:rgba(0,0,0,.12);--bdr3:rgba(0,0,0,.18);
  --tx:#1a1a18;--tx2:#5b5950;--tx3:#9e9a91;
  --acc:#c96442;--acc-h:#a8502f;--acc-bg:rgba(201,100,66,.08);
  --green:#16a34a;--red:#dc2626;--blue:#2563eb;
  --shadow:0 2px 12px rgba(0,0,0,.07);
  --shadow-lg:0 8px 32px rgba(0,0,0,.13);
  --sbw:260px;
  --font:'Inter',system-ui,-apple-system,sans-serif;
}
[data-theme=dark]{
  --bg:#1e1d1b;--bg-sb:#161513;--bg-comp:#252320;
  --bg-user:#2e2c29;--bg-hover:#2a2825;--bg-input:#252320;
  --bdr:rgba(255,255,255,.07);--bdr2:rgba(255,255,255,.11);--bdr3:rgba(255,255,255,.18);
  --tx:#eeecea;--tx2:#a3a098;--tx3:#6a6660;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;background:var(--bg);color:var(--tx);font-family:var(--font);-webkit-font-smoothing:antialiased;}
button,input,textarea,select{font-family:var(--font);}

/* ── Layout ── */
#app{display:flex;height:100vh;height:100dvh;overflow:hidden;}

/* ── Sidebar ── */
#sb{width:var(--sbw);min-width:var(--sbw);background:var(--bg-sb);border-right:1px solid var(--bdr);display:flex;flex-direction:column;z-index:200;flex-shrink:0;transition:transform .25s cubic-bezier(.4,0,.2,1);}
#sb.off{transform:translateX(-100%);position:fixed;height:100%;height:100dvh;}
#sb.open{transform:translateX(0);}
.sb-top{padding:10px 8px 6px;display:flex;align-items:center;gap:4px;}
.sb-logo{display:flex;align-items:center;gap:7px;font-size:15px;font-weight:600;color:var(--tx);padding:5px 7px;border-radius:8px;text-decoration:none;flex:1;min-width:0;}
.sb-logo-icon{color:var(--acc);font-size:17px;line-height:1;flex-shrink:0;}
.ib{width:32px;height:32px;border-radius:8px;border:none;background:transparent;color:var(--tx2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .12s;flex-shrink:0;}
.ib:hover{background:var(--bg-hover);color:var(--tx);}
.sb-btn{display:flex;align-items:center;gap:8px;padding:7px 11px;border-radius:8px;cursor:pointer;font-size:13px;color:var(--tx2);transition:all .1s;margin:0 6px;border:none;background:none;width:calc(100% - 12px);text-align:left;}
.sb-btn:hover{background:var(--bg-hover);color:var(--tx);}
.sb-btn.acc{color:var(--acc);}.sb-btn.acc:hover{background:var(--acc-bg);}
.sb-sec{padding:10px 14px 3px;font-size:10.5px;font-weight:600;color:var(--tx3);text-transform:uppercase;letter-spacing:.07em;}
#sb-hist{flex:1;overflow-y:auto;padding:0 6px 8px;scrollbar-width:thin;scrollbar-color:var(--bdr2) transparent;}
#sb-hist::-webkit-scrollbar{width:3px;}
#sb-hist::-webkit-scrollbar-thumb{background:var(--bdr2);border-radius:3px;}
.hi{padding:7px 10px;border-radius:8px;cursor:pointer;font-size:13px;color:var(--tx2);display:flex;align-items:center;gap:6px;transition:background .1s;position:relative;}
.hi:hover{background:var(--bg-hover);color:var(--tx);}
.hi.on{background:var(--bg-hover);color:var(--tx);}
.hi-t{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px;}
.hi-prov{font-size:10px;padding:1px 5px;border-radius:4px;background:var(--bg-hover);color:var(--tx3);flex-shrink:0;opacity:0;transition:opacity .1s;}
.hi:hover .hi-prov,.hi.on .hi-prov{opacity:1;}
.hi-del{opacity:0;border:none;background:none;cursor:pointer;color:var(--tx3);padding:2px 6px;border-radius:4px;font-size:13px;position:absolute;right:4px;transition:all .1s;line-height:1;}
.hi:hover .hi-del{opacity:1;}
.hi-del:hover{color:var(--red);}
#sb-proj{overflow-y:auto;max-height:160px;padding:0 6px 2px;}
.proj-item{padding:7px 10px;border-radius:8px;cursor:pointer;font-size:13px;color:var(--tx2);display:flex;align-items:center;gap:7px;transition:background .1s;position:relative;}
.proj-item:hover{background:var(--bg-hover);color:var(--tx);}
.proj-item.on{background:var(--bg-hover);color:var(--tx);}
.proj-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.proj-del{opacity:0;border:none;background:none;cursor:pointer;color:var(--tx3);padding:2px 5px;border-radius:4px;font-size:13px;position:absolute;right:4px;line-height:1;}
.proj-item:hover .proj-del{opacity:1;}
.proj-del:hover{color:var(--red);}
.sb-usage{margin:4px 10px 4px;padding:10px 12px;background:var(--bg-comp);border:1px solid var(--bdr);border-radius:10px;}
.sb-usage-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:5px;}
.sb-plan-name{font-size:12px;font-weight:600;color:var(--acc);}
.sb-plan-pct{font-size:11px;color:var(--tx3);}
.ubar{height:4px;background:var(--bdr);border-radius:4px;overflow:hidden;}
.ubar-fill{height:100%;border-radius:4px;background:var(--acc);transition:width .4s;}
.ubar-fill.warn{background:#f59e0b;}
.ubar-fill.danger{background:var(--red);}
.sb-usage-sub{font-size:11px;color:var(--tx3);margin-top:5px;}
.plan-exp{font-size:10px;padding:1px 5px;border-radius:8px;background:var(--acc-bg);color:var(--acc);margin-left:4px;font-weight:500;}
#btn-upgrade{display:none;text-align:center;padding:7px;background:var(--acc);color:#fff;border-radius:8px;font-size:12.5px;font-weight:600;margin:2px 10px 4px;border:none;cursor:pointer;width:calc(100% - 20px);transition:background .12s;}
#btn-upgrade:hover{background:var(--acc-h);}
.sb-bot{border-top:1px solid var(--bdr);padding:6px 6px 8px;flex-shrink:0;position:relative;}
.user-row{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:10px;cursor:pointer;transition:background .1s;flex:1;}
.user-row:hover{background:var(--bg-hover);}
.user-av{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff;flex-shrink:0;}
.user-info{flex:1;min-width:0;}
.user-name{font-size:13px;font-weight:500;color:var(--tx);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.user-plan{font-size:10.5px;font-weight:600;padding:1px 6px;border-radius:8px;background:var(--bg-hover);color:var(--tx2);display:inline-block;margin-top:1px;}
.up-item{display:flex;align-items:center;gap:9px;padding:9px 12px;border-radius:8px;border:none;background:none;color:var(--tx2);font-size:13.5px;cursor:pointer;text-align:left;width:100%;transition:all .12s;}
.up-item:hover{background:var(--bg-hover);color:var(--tx);}
.up-item.danger{color:var(--red);}.up-item.danger:hover{background:#fef2f2;}
.up-sep{height:1px;background:var(--bdr);margin:3px 0;}

/* ── Main ── */
#main{flex:1;display:flex;flex-direction:column;min-width:0;overflow:hidden;position:relative;}
#topbar{height:46px;padding:0 10px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--bdr);background:var(--bg);flex-shrink:0;gap:8px;transition:opacity .2s;}
#topbar.hidden{opacity:0;pointer-events:none;border-bottom-color:transparent;}
.tb-left{display:flex;align-items:center;gap:6px;min-width:0;flex:1;}
.tb-title{font-size:13px;color:var(--tx2);font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.tb-right{display:flex;align-items:center;gap:2px;flex-shrink:0;}
.proj-badge{display:inline-flex;align-items:center;gap:4px;background:var(--acc-bg);color:var(--acc);border-radius:6px;padding:2px 8px;font-size:12px;font-weight:600;flex-shrink:0;}

/* ── Chat ── */
#chat{flex:1;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:var(--bdr2) transparent;}
#chat::-webkit-scrollbar{width:4px;}
#chat::-webkit-scrollbar-thumb{background:var(--bdr2);border-radius:4px;}
#cbody{max-width:720px;margin:0 auto;padding:20px 20px 8px;}
#scrl{position:absolute;bottom:88px;left:50%;transform:translateX(-50%);background:var(--bg-comp);border:1px solid var(--bdr2);border-radius:20px;padding:5px 14px;font-size:12px;color:var(--tx2);cursor:pointer;display:none;align-items:center;gap:5px;box-shadow:var(--shadow);z-index:10;}
#scrl.vis{display:flex;}
#scrl:hover{background:var(--bg-hover);}

/* ── Welcome ── */
#welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px;min-height:calc(100dvh - 160px);}
.wh{font-size:32px;font-weight:300;color:var(--tx);display:flex;align-items:center;gap:12px;margin-bottom:8px;letter-spacing:-.6px;}
.wh-icon{color:var(--acc);font-size:28px;line-height:1;}
.wh-sub{font-size:15px;color:var(--tx2);margin-bottom:0px;}
#tabs{display:none;}

/* ── Messages ── */
.mw{padding:3px 0;animation:fu .18s ease both;}
@keyframes fu{from{opacity:0;transform:translateY(3px);}to{opacity:1;}}
.mu{display:flex;justify-content:flex-end;margin:6px 0;}
.mu-in{display:flex;flex-direction:column;align-items:flex-end;max-width:75%;}
.mu-lbl{font-size:11px;color:var(--tx3);margin-bottom:3px;}
.mu-bub{background:var(--bg-user);border-radius:18px 18px 4px 18px;padding:10px 15px;font-size:14.5px;line-height:1.7;color:var(--tx);word-break:break-word;white-space:pre-wrap;border:1px solid var(--bdr);}
.mu-files{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:6px;justify-content:flex-end;}
.mu-img{width:80px;height:80px;object-fit:cover;border-radius:10px;border:1px solid var(--bdr);}
.mu-doc{display:flex;align-items:center;gap:5px;background:var(--bg-comp);border:1px solid var(--bdr);border-radius:8px;padding:5px 10px;font-size:12px;color:var(--tx2);}
.mu-acts{display:flex;gap:1px;margin-top:3px;opacity:0;transition:opacity .15s;justify-content:flex-end;}
.mw:hover .mu-acts{opacity:1;}
.ma{padding:2px 0 6px;}
.ma-lbl{font-size:12px;color:var(--tx3);margin-bottom:7px;display:flex;align-items:center;gap:6px;}
@keyframes spin{from{transform:rotate(0deg);}to{transform:rotate(360deg);}}
.ai-spin{display:inline-block;animation:spin .9s linear infinite;}
@keyframes cur-blink{0%,100%{opacity:1;}50%{opacity:0;}}
.ai-cursor{display:inline-block;width:2px;height:1em;background:var(--tx);border-radius:1px;vertical-align:text-bottom;animation:cur-blink .65s ease infinite;margin-left:2px;}
.typing{display:flex;gap:5px;align-items:center;padding:4px 0;}
.typing span{width:6px;height:6px;border-radius:50%;background:var(--tx3);animation:bl 1.3s infinite;}
.typing span:nth-child(2){animation-delay:.2s;}
.typing span:nth-child(3){animation-delay:.4s;}
@keyframes bl{0%,60%,100%{transform:translateY(0);opacity:.4;}30%{transform:translateY(-5px);opacity:1;}}
.ait{font-size:14.5px;line-height:1.75;color:var(--tx);}
.ait p{margin-bottom:10px;}.ait p:last-child{margin-bottom:0;}
.ait h1{font-size:19px;font-weight:600;margin:18px 0 8px;line-height:1.3;}
.ait h2{font-size:16px;font-weight:600;margin:16px 0 7px;line-height:1.3;}
.ait h3{font-size:14.5px;font-weight:600;margin:13px 0 6px;}
.ait ul,.ait ol{padding-left:20px;margin-bottom:10px;}
.ait li{margin-bottom:4px;line-height:1.7;}
.ait blockquote{border-left:3px solid var(--acc);padding:7px 14px;color:var(--tx2);margin:10px 0;border-radius:0 6px 6px 0;background:var(--acc-bg);}
.ait a{color:var(--acc);text-decoration:none;}.ait a:hover{text-decoration:underline;}
.ait hr{border:none;border-top:1px solid var(--bdr);margin:14px 0;}
.ait table{border-collapse:collapse;width:100%;margin:10px 0;font-size:13.5px;display:block;overflow-x:auto;}
.ait th,.ait td{border:1px solid var(--bdr2);padding:7px 11px;text-align:left;}
.ait th{background:var(--bg-hover);font-weight:600;}
.ait strong{font-weight:600;}.ait em{font-style:italic;}
.ait pre{background:var(--bg-hover);border:1px solid var(--bdr);border-radius:10px;overflow:hidden;margin:10px 0;}
.code-hd{display:flex;align-items:center;justify-content:space-between;padding:6px 14px;border-bottom:1px solid var(--bdr);font-size:11.5px;color:var(--tx3);background:var(--bg-comp);}
.code-lang{font-weight:600;color:var(--tx2);}
.code-cp{background:none;border:1px solid var(--bdr2);cursor:pointer;color:var(--tx3);font-size:12px;padding:2px 8px;border-radius:6px;transition:all .12s;display:flex;align-items:center;gap:4px;}
.code-cp:hover{background:var(--bg-hover);color:var(--tx);}
.ait pre code{display:block;padding:12px;overflow-x:auto;background:none!important;font-size:13px;line-height:1.6;font-family:'SFMono-Regular',Consolas,monospace;}
.ait code:not(pre code){background:var(--bg-hover);border:1px solid var(--bdr);border-radius:4px;padding:1px 5px;font-size:13px;font-family:'SFMono-Regular',Consolas,monospace;}
.fc-area{margin-top:10px;display:flex;flex-direction:column;gap:6px;}
.fc{display:flex;align-items:center;gap:10px;background:var(--bg-comp);border:1px solid var(--bdr);border-radius:10px;padding:9px 13px;}
.fc-ico{width:34px;height:34px;border-radius:7px;background:var(--bg-hover);border:1px solid var(--bdr);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:15px;}
.fc-inf{flex:1;min-width:0;}
.fc-nm{font-size:13px;font-weight:500;color:var(--tx);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.fc-mt{font-size:11.5px;color:var(--tx3);margin-top:1px;}
.fc-dl{padding:4px 11px;border-radius:7px;border:1px solid var(--bdr);background:none;color:var(--tx2);font-size:12px;cursor:pointer;transition:all .12s;flex-shrink:0;}
.fc-dl:hover{background:var(--bg-hover);}
.ma-acts{display:flex;gap:1px;margin-top:6px;opacity:0;transition:opacity .15s;}
.mw:hover .ma-acts{opacity:1;}
.ab{background:none;border:none;cursor:pointer;padding:4px 8px;border-radius:7px;font-size:12px;color:var(--tx3);display:flex;align-items:center;gap:4px;transition:all .12s;}
.ab:hover{background:var(--bg-hover);color:var(--tx);}
.limit-warn{background:#fef9ee;border:1px solid #f59e0b;border-radius:10px;padding:12px 15px;margin:12px 0;font-size:13px;color:#92400e;line-height:1.6;}
[data-theme=dark] .limit-warn{background:#2a1f0a;border-color:#854f0b;color:#fbbf24;}
.limit-warn a{color:var(--acc);font-weight:600;cursor:pointer;text-decoration:underline;}

/* ── Input area ── */
#cw{padding:0 16px 12px;max-width:760px;width:100%;margin:0 auto;flex-shrink:0;}
#cb{background:var(--bg-input);border:1.5px solid var(--bdr2);border-radius:18px;position:relative;transition:all .15s;box-shadow:0 1px 8px rgba(0,0,0,.05);}
#cb:focus-within{border-color:var(--bdr3);box-shadow:0 2px 14px rgba(0,0,0,.08);}
#fp{display:none;flex-wrap:wrap;gap:6px;padding:9px 12px 5px;border-bottom:1px solid var(--bdr);}
#fp.show{display:flex;}
.fp-it{position:relative;}
.fp-img{width:52px;height:52px;object-fit:cover;border-radius:8px;border:1px solid var(--bdr);}
.fp-doc{display:flex;align-items:center;gap:5px;background:var(--bg-hover);border-radius:7px;padding:4px 8px;font-size:12px;color:var(--tx2);}
.fp-rm{position:absolute;top:-5px;right:-5px;width:16px;height:16px;border-radius:50%;background:var(--red);border:none;color:#fff;cursor:pointer;font-size:9px;display:flex;align-items:center;justify-content:center;line-height:1;}
#inp{width:100%;border:none;outline:none;resize:none;background:transparent;color:var(--tx);font-size:15px;line-height:1.65;padding:13px 16px 6px;min-height:46px;max-height:180px;overflow-y:auto;border-radius:18px 18px 0 0;}
#inp::placeholder{color:var(--tx3);font-size:15px;}
#cr{display:flex;align-items:center;justify-content:space-between;padding:5px 8px 9px;}
.cr-l{display:flex;align-items:center;gap:3px;position:relative;}
.cr-r{display:flex;align-items:center;gap:4px;position:relative;}
.plus-btn{width:30px;height:30px;border-radius:8px;border:none;background:transparent;color:var(--tx2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .12s;flex-shrink:0;}
.plus-btn:hover{background:var(--bg-hover);color:var(--tx);}
#web-ind{display:none;align-items:center;gap:4px;font-size:11.5px;color:var(--blue);padding:3px 8px;border-radius:12px;background:rgba(37,99,235,.08);cursor:pointer;}
#web-ind.on{display:flex;}
#web-ind:hover{background:rgba(37,99,235,.14);}
.pop{position:absolute;background:var(--bg-comp);border:1px solid var(--bdr2);border-radius:12px;padding:5px;box-shadow:var(--shadow-lg);display:none;flex-direction:column;z-index:600;animation:popIn .14s ease both;}
@keyframes popIn{from{opacity:0;transform:scale(.97) translateY(4px);}to{opacity:1;transform:scale(1) translateY(0);}}
.pop.open{display:flex;}
#plus-pop{bottom:42px;left:0;min-width:195px;}
.pop-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:8px;border:none;background:none;color:var(--tx2);font-size:13.5px;cursor:pointer;text-align:left;width:100%;transition:all .12s;white-space:nowrap;}
.pop-item:hover{background:var(--bg-hover);color:var(--tx);}
.pop-sep{height:1px;background:var(--bdr);margin:3px 0;}
.pi-right{margin-left:auto;display:flex;align-items:center;gap:4px;}
#model-btn{display:flex;align-items:center;gap:5px;padding:4px 9px;border-radius:16px;border:1px solid var(--bdr2);background:transparent;color:var(--tx2);font-size:12.5px;font-weight:500;cursor:pointer;transition:all .12s;white-space:nowrap;max-width:180px;}
#model-btn:hover{background:var(--bg-hover);color:var(--tx);}
.m-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0;}
#model-pop{position:absolute;bottom:calc(100% + 8px);right:0;background:var(--bg-comp);border:1px solid var(--bdr2);border-radius:14px;box-shadow:var(--shadow-lg);display:none;z-index:600;overflow:hidden;min-width:220px;max-height:320px;overflow-y:auto;}
#model-pop.open{display:block;}
.mp-body{padding:5px;}
.mp-prov-label{font-size:10.5px;font-weight:700;letter-spacing:.07em;color:var(--tx3);text-transform:uppercase;padding:7px 10px 3px;display:flex;align-items:center;gap:6px;}
.mp-prov-dot{width:7px;height:7px;border-radius:50%;}
.mp-item{display:flex;align-items:center;gap:9px;padding:7px 12px;border-radius:8px;cursor:pointer;transition:all .12s;border:none;background:none;width:100%;text-align:left;}
.mp-item:hover{background:var(--bg-hover);}
.mp-item.cur{background:var(--bg-hover);}
.mp-item-name{font-size:13px;color:var(--tx);font-weight:500;}
.mp-sep{height:1px;background:var(--bdr);margin:3px 6px;}
#send{width:32px;height:32px;border-radius:50%;border:none;background:var(--acc);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;flex-shrink:0;}
#send:hover:not(:disabled){background:var(--acc-h);transform:scale(1.06);}
#send:active:not(:disabled){transform:scale(.93);}
#send:disabled{background:var(--bdr2);color:var(--tx3);cursor:not-allowed;}
#send.stop{background:var(--red);}
#send.stop:hover{background:#b91c1c;}
#disc{text-align:center;font-size:11px;color:var(--tx3);padding:4px 0 0;}

/* ── Overlays & Modals ── */
#sb-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:199;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);}
#sb-overlay.show{display:block;}
.mbg{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;pointer-events:none;transition:opacity .2s;backdrop-filter:blur(4px);}
.mbg.open{opacity:1;pointer-events:all;}
.modal{background:var(--bg-comp);border-radius:16px;padding:22px 22px 17px;width:390px;max-width:94vw;transform:scale(.96);transition:transform .2s;border:1px solid var(--bdr);}
.mbg.open .modal{transform:scale(1);}
.modal h3{font-size:16px;font-weight:600;margin-bottom:9px;}
.modal p{font-size:13.5px;color:var(--tx2);line-height:1.6;}
.modal-row{display:flex;gap:8px;justify-content:flex-end;margin-top:15px;}
.btn-c{padding:7px 14px;border-radius:8px;border:1px solid var(--bdr2);background:none;color:var(--tx);font-size:13.5px;cursor:pointer;transition:all .12s;}
.btn-c:hover{background:var(--bg-hover);}
.btn-ok{padding:7px 14px;border-radius:8px;border:none;background:var(--acc);color:#fff;font-size:13.5px;font-weight:600;cursor:pointer;}
.btn-ok:hover{background:var(--acc-h);}
#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(10px);background:#1a1a18;color:#fff;padding:8px 18px;border-radius:20px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:9999;white-space:nowrap;}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
.proj-mdl-label{font-size:13px;font-weight:500;color:var(--tx2);display:block;margin-bottom:5px;}
.proj-mdl-input,.proj-mdl-ta{width:100%;padding:9px 12px;border:1px solid var(--bdr);border-radius:9px;font-size:14px;color:var(--tx);background:var(--bg);outline:none;}
.proj-mdl-ta{resize:vertical;min-height:80px;line-height:1.5;font-size:13px;}
.proj-mdl-input:focus,.proj-mdl-ta:focus{border-color:var(--acc);}
.proj-inst-display{font-size:13.5px;color:var(--tx2);line-height:1.65;white-space:pre-wrap;min-height:50px;}
.proj-inst-empty{font-size:13px;color:var(--tx3);font-style:italic;}
.pf-list{display:flex;flex-direction:column;gap:5px;margin-top:7px;max-height:180px;overflow-y:auto;}
.pf-row{display:flex;align-items:center;gap:8px;background:var(--bg-hover);border-radius:8px;padding:7px 10px;}
.pf-name{flex:1;font-size:13px;color:var(--tx);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.pf-size{font-size:11px;color:var(--tx3);flex-shrink:0;}
.pf-rm{border:none;background:none;cursor:pointer;color:var(--tx3);padding:2px 5px;font-size:13px;border-radius:4px;line-height:1;}
.pf-rm:hover{color:var(--red);}
.proj-tabs{display:flex;gap:1px;padding:0 18px;border-bottom:1px solid var(--bdr);}
.proj-tab{padding:9px 14px;border:none;background:none;color:var(--tx3);font-size:13.5px;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all .12s;}
.proj-tab:hover{color:var(--tx);}
.proj-tab.on{color:var(--tx);border-bottom-color:var(--acc);font-weight:500;}

/* ── Context menu ── */
.ctx-menu{position:fixed;background:var(--bg-comp);border:1px solid var(--bdr2);border-radius:14px;padding:5px;box-shadow:var(--shadow-lg);z-index:700;min-width:190px;animation:popIn .14s ease both;}
.ctx-item{display:flex;align-items:center;gap:10px;padding:9px 13px;border-radius:9px;border:none;background:none;color:var(--tx);font-size:14px;cursor:pointer;width:100%;text-align:left;transition:background .1s;}
.ctx-item:hover{background:var(--bg-hover);}
.ctx-item.danger{color:var(--red);}
.ctx-sep{height:1px;background:var(--bdr);margin:3px 0;}

/* ── Mobile nav ── */
#mobile-nav{display:none;}

/* ── Tablet ── */
@media(min-width:768px) and (max-width:1024px){
  :root{--sbw:230px;}
  #cbody,#cw{padding-left:14px;padding-right:14px;}
  .mu-in{max-width:88%;}
}

/* ── Mobile ── */
@media(max-width:767px){
  :root{--sbw:88vw;}
  #sb{position:fixed;width:88vw;max-width:340px;height:100%;height:100dvh;transform:translateX(-100%);border-radius:0 20px 20px 0;box-shadow:6px 0 28px rgba(0,0,0,.18);z-index:400;border-right:none;}
  #sb.open{transform:translateX(0);}
  #sb-overlay{z-index:399;}
  .sb-top{padding:52px 14px 10px;border-bottom:1px solid var(--bdr);}
  .sb-logo{font-size:18px;}
  .sb-sec{padding:14px 16px 4px;font-size:10.5px;}
  .sb-btn{padding:12px 16px;font-size:15px;margin:0 6px;border-radius:10px;}
  #sb-hist{padding:0 6px 6px;}
  .hi{padding:11px 12px;font-size:14.5px;border-radius:10px;}
  .hi-t{font-size:14.5px;}
  .hi-prov{opacity:1;}
  .hi-del{opacity:1;}
  #sb-proj{max-height:180px;}
  .proj-item{padding:11px 12px;font-size:14.5px;}
  .sb-usage{margin:6px 12px;}
  .sb-bot{padding:8px 10px calc(10px + env(safe-area-inset-bottom,0px));}
  .user-row{padding:9px 10px;}
  .user-av{width:34px;height:34px;}
  .user-name{font-size:14.5px;}
  #main{width:100%;}
  #topbar{padding:0 12px;height:50px;}
  .tb-title{font-size:13.5px;max-width:200px;font-weight:600;}
  #chat{padding-bottom:calc(150px + env(safe-area-inset-bottom,0px));}
  #cbody{max-width:100%;padding:14px 12px 0;}
  #welcome{min-height:calc(100dvh - 180px);padding:20px 18px;}
  .wh{font-size:24px;letter-spacing:-.4px;font-weight:300;}
  .wh-icon{font-size:22px;}
  .wh-sub{font-size:14px;}
  .mu-in{max-width:88%;}
  .mu-bub{font-size:14.5px;padding:10px 13px;}
  .ait{font-size:14.5px;}
  .ma-acts,.mu-acts{opacity:1;}
  .code-cp{opacity:1;}
  .ab{padding:5px 7px;}
  .ab svg{width:14px;height:14px;}
  #cw{padding:0 10px calc(6px + env(safe-area-inset-bottom,0px));position:fixed;bottom:calc(56px + env(safe-area-inset-bottom,0px));left:0;right:0;background:var(--bg);}
  #cb{border-radius:18px;}
  #inp{font-size:16px;padding:12px 14px 5px;min-height:46px;}
  #cr{padding:5px 8px 9px;}
  #model-btn{font-size:12px;padding:4px 8px;max-width:140px;}
  #send{width:32px;height:32px;}
  #disc{display:none;}
  .mbg{align-items:flex-end;}
  .mbg .modal{width:100%;max-width:100%;border-radius:22px 22px 0 0;padding-bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateY(20px);}
  .mbg.open .modal{transform:translateY(0);}
  #mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--bg);border-top:1px solid var(--bdr2);padding:7px 0 calc(7px + env(safe-area-inset-bottom,0px));z-index:200;}
  .mnav-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;border:none;background:none;cursor:pointer;font-size:10px;font-weight:500;color:var(--tx3);padding:2px 0;min-height:46px;justify-content:center;transition:color .15s;}
  .mnav-btn.on{color:var(--acc);}
  .mnav-btn svg{width:22px;height:22px;}
}

/* ── PC wide ── */
@media(min-width:1440px){
  :root{--sbw:280px;}
  #cbody{max-width:760px;}
  #cw{max-width:800px;}
}

/* ── Dark mode hljs ── */
[data-theme=dark] #hljs-light{disabled:true;}
[data-theme=dark] #hljs-dark{disabled:false;}
[data-theme=dark] #cb{background:var(--bg-comp);}

/* ── Mobile Settings Screen ── */
.mobile-settings-screen{display:none;position:fixed;inset:0;background:var(--bg-sb);z-index:500;flex-direction:column;overflow-y:auto;padding-bottom:calc(80px + env(safe-area-inset-bottom,0px));animation:slideUp .22s ease both;}
@keyframes slideUp{from{transform:translateY(16px);opacity:0;}to{transform:translateY(0);opacity:1;}}
.mobile-settings-screen.open{display:flex;}
.ms-header{display:flex;align-items:center;padding:54px 18px 14px;gap:10px;}
.ms-close{width:30px;height:30px;border-radius:50%;border:none;background:rgba(128,128,128,.15);color:var(--tx);cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;}
.ms-title{font-size:17px;font-weight:600;color:var(--tx);}
.ms-body{padding:0 14px;display:flex;flex-direction:column;gap:10px;}
.ms-card{background:var(--bg-comp);border-radius:14px;padding:14px;}
.ms-user-card{display:flex;align-items:center;gap:12px;}
.ms-avatar{width:42px;height:42px;border-radius:50%;background:var(--acc);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;flex-shrink:0;}
.ms-user-info{flex:1;min-width:0;}
.ms-user-name{font-size:15px;font-weight:600;color:var(--tx);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.ms-user-email{font-size:12px;color:var(--tx3);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.ms-plan-badge{font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:20px;background:var(--acc-bg);color:var(--acc);flex-shrink:0;}
.ms-upgrade-card{cursor:pointer;}
.ms-upgrade-title{font-size:15px;font-weight:700;color:var(--tx);margin-bottom:4px;}
.ms-upgrade-sub{font-size:13px;color:var(--tx2);margin-bottom:10px;}
.ms-upgrade-btn{padding:7px 16px;background:var(--acc);color:#fff;border:none;border-radius:18px;font-size:13px;font-weight:600;cursor:pointer;}
.ms-group{background:var(--bg-comp);border-radius:14px;overflow:hidden;}
.ms-item{display:flex;align-items:center;gap:13px;padding:14px 16px;width:100%;border:none;background:none;cursor:pointer;border-bottom:1px solid var(--bdr);transition:background .1s;}
.ms-item:last-child{border-bottom:none;}
.ms-item:active{background:var(--bg-hover);}
.ms-item-icon{font-size:17px;width:22px;text-align:center;flex-shrink:0;}
.ms-item-label{flex:1;font-size:15px;color:var(--tx);text-align:left;}
.ms-item-arrow{font-size:18px;color:var(--tx3);}
.ms-item-danger .ms-item-label{color:var(--red);}