:root{--b:#0d1117;--b2:#161b22;--s:#1c2128;--sh:#252c35;--bd:#30363d;--t:#e6edf3;--t2:#b1bac4;--m:#8b949e;--a:#58a6ff;--g:#3fb950;--r:#f85149;--ub:#1f6feb;--sb-w:260px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--b);color:var(--t);height:100dvh;overflow:hidden}

/* Layout */
#app{display:flex;height:100dvh}
#main{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}

/* Sidebar */
#sidebar{width:var(--sb-w);background:var(--b2);border-right:1px solid var(--bd);display:flex;flex-direction:column;flex-shrink:0;transition:margin-left .2s ease}
#sidebar.hidden{margin-left:calc(var(--sb-w) * -1)}
.sb-header{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--bd);font-weight:600;font-size:15px}
.sb-header .logo{width:30px;height:30px;background:linear-gradient(135deg,#58a6ff,#a371f7);border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;color:#fff;flex-shrink:0}
.sb-section-label{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--m);padding:12px 16px 6px;font-weight:600}
#channel-list{flex:1;overflow-y:auto;padding:4px 8px}
.ch-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;cursor:pointer;transition:background .12s;margin-bottom:2px}
.ch-item:hover{background:var(--s)}
.ch-item.active{background:var(--sh);border:1px solid var(--bd)}
.ch-item .ch-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.ch-item .ch-dot.online{background:var(--g)}
.ch-item .ch-dot.offline{background:var(--m);opacity:.4}
.ch-item .ch-info{flex:1;min-width:0}
.ch-item .ch-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ch-item .ch-path{font-size:10px;color:var(--m);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ch-item .ch-badge{background:var(--a);color:#fff;font-size:10px;font-weight:700;padding:1px 6px;border-radius:10px;flex-shrink:0}
.sb-footer{padding:10px 16px;border-top:1px solid var(--bd);font-size:11px;color:var(--m);display:flex;align-items:center;gap:6px}

/* Header */
header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--bd);background:var(--b2);flex-shrink:0;gap:12px}
.menu-btn{background:var(--s);border:1px solid var(--bd);color:var(--t);cursor:pointer;padding:6px 10px;border-radius:8px;font-size:16px;line-height:1;display:none}
.hl{flex:1;min-width:0}
header h1{font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.st{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--m)}
#dot{width:7px;height:7px;border-radius:50%;background:var(--r);transition:background .3s;display:inline-block}
#dot.on{background:var(--g)}
#clr{background:var(--s);border:1px solid var(--bd);cursor:pointer;padding:6px 8px;border-radius:8px;font-size:14px;line-height:1}
#clr:hover{background:var(--sh)}

/* Tab bar */
#tab-bar{display:flex;align-items:center;background:var(--b2);border-bottom:1px solid var(--bd);flex-shrink:0;padding:0 8px;gap:4px}
#tab-container{display:flex;overflow-x:auto;flex:1;gap:2px;padding:6px 0;scrollbar-width:thin}
#tab-container::-webkit-scrollbar{height:3px}
#tab-container::-webkit-scrollbar-thumb{background:var(--bd);border-radius:2px}
.chat-tab{display:flex;align-items:center;gap:6px;padding:5px 10px;border-radius:6px;cursor:pointer;white-space:nowrap;font-size:12px;color:var(--t2);background:transparent;border:1px solid transparent;transition:background .12s,border-color .12s;flex-shrink:0;max-width:180px}
.chat-tab:hover{background:var(--s)}
.chat-tab.active{background:var(--sh);border-color:var(--bd);color:var(--t)}
.chat-tab .tab-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat-tab .tab-close{background:none;border:none;color:var(--m);cursor:pointer;font-size:14px;line-height:1;padding:0 2px;border-radius:3px;opacity:.6;transition:opacity .12s,color .12s}
.chat-tab .tab-close:hover{opacity:1;color:var(--r)}
.single-chat .tab-close{display:none}
.tab-edit-input{background:var(--s);border:1px solid var(--a);color:var(--t);font-size:12px;font-family:inherit;padding:2px 4px;border-radius:4px;outline:none;width:100px}
#new-chat-btn{background:var(--s);border:1px solid var(--bd);color:var(--t2);cursor:pointer;padding:4px 10px;border-radius:6px;font-size:16px;line-height:1;flex-shrink:0;transition:background .12s}
#new-chat-btn:hover{background:var(--sh);color:var(--t)}

/* Streaming message indicator */
.mr.streaming{border-left:3px solid var(--a)}
.stream-badge{font-size:10px;background:var(--a);color:#fff;padding:1px 6px;border-radius:4px;animation:pulse 1.5s infinite}
.stream-cursor{display:inline-block;width:2px;height:14px;background:var(--a);margin-left:2px;vertical-align:text-bottom;animation:blink 0.8s step-end infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.mr.streaming .ct{min-height:20px}

/* Messages */
#msgs{flex:1;overflow-y:auto;scroll-behavior:smooth}
#msgs::-webkit-scrollbar{width:6px}
#msgs::-webkit-scrollbar-thumb{background:var(--bd);border-radius:3px}

.mr{padding:18px 20px;display:flex;gap:12px;animation:fi .2s ease}
.mr.assistant{background:var(--b2)}
.mr.remote-user{border-left:3px solid var(--a)}
@keyframes fi{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
.av{width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0}
.av.u{background:var(--ub);color:#fff}.av.a{background:linear-gradient(135deg,#58a6ff,#a371f7);color:#fff}
.bd{flex:1;min-width:0}.hd{display:flex;align-items:center;gap:8px;margin-bottom:3px}
.nm{font-size:13px;font-weight:600}.tm{font-size:11px;color:var(--m)}
.rb{font-size:9px;background:var(--a);color:#fff;padding:1px 5px;border-radius:4px}

/* Content / Markdown */
.ct{font-size:14px;line-height:1.7;word-wrap:break-word;overflow-wrap:break-word}
.ct p{margin:0 0 10px}.ct p:last-child{margin-bottom:0}
.ct ul,.ct ol{margin:0 0 10px 20px}.ct li{margin-bottom:4px}
.ct h1,.ct h2,.ct h3{margin:14px 0 6px;font-weight:600}
.ct h1{font-size:18px}.ct h2{font-size:16px}.ct h3{font-size:15px}
.ct blockquote{border-left:3px solid #3d444d;padding:4px 12px;margin:8px 0;color:var(--t2)}
.ct a{color:var(--a);text-decoration:none}.ct a:hover{text-decoration:underline}
.ct strong{font-weight:600}
.ct hr{border:none;border-top:1px solid var(--bd);margin:12px 0}
.ct table{border-collapse:collapse;margin:8px 0;width:100%}
.ct th,.ct td{border:1px solid var(--bd);padding:6px 10px;font-size:13px}
.ct th{background:var(--s);font-weight:600}
.ct code:not(pre code){background:var(--s);padding:2px 6px;border-radius:4px;font-size:13px;font-family:"SF Mono","Fira Code",monospace;border:1px solid var(--bd)}
.cb{position:relative;margin:10px 0;border-radius:8px;overflow:hidden;border:1px solid var(--bd)}
.cb .ch{display:flex;align-items:center;justify-content:space-between;padding:5px 12px;background:var(--s);border-bottom:1px solid var(--bd);font-size:12px;color:var(--m)}
.cb .cp{background:none;border:none;color:var(--m);cursor:pointer;padding:2px 6px;border-radius:4px;font-size:11px}
.cb .cp:hover{color:var(--t)}.cb .cp.ok{color:var(--g)}
.cb pre{margin:0;padding:12px 16px;overflow-x:auto;background:#0d1117}
.cb pre code{font-family:"SF Mono","Fira Code",monospace;font-size:13px;line-height:1.5}
.acts{display:flex;gap:4px;margin-top:6px;opacity:0;transition:opacity .15s}
.mr:hover .acts{opacity:1}
.act{background:none;border:1px solid transparent;color:var(--m);cursor:pointer;padding:3px 7px;border-radius:6px;font-size:11px;transition:all .12s}
.act:hover{color:var(--t);background:var(--s);border-color:var(--bd)}

/* Empty / no-channel state */
.empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--m);text-align:center;gap:12px;padding:40px}
.empty .bl{width:72px;height:72px;font-size:36px;background:linear-gradient(135deg,#58a6ff,#a371f7);border-radius:18px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;margin-bottom:8px}
.empty p{font-size:14px;max-width:400px;line-height:1.6}

/* Input area */
#ia{padding:10px 20px 14px;background:var(--b);flex-shrink:0}
#f{max-width:768px;margin:0 auto}
.ib{display:flex;align-items:flex-end;gap:8px;background:var(--b2);border:1px solid var(--bd);border-radius:14px;padding:8px 8px 8px 16px;transition:border-color .2s}
.ib:focus-within{border-color:var(--a)}
#inp{flex:1;background:transparent;border:none;color:var(--t);font-size:14px;font-family:inherit;resize:none;max-height:140px;outline:none;line-height:1.5;padding:4px 0}
#snd{width:36px;height:36px;background:var(--a);border:none;border-radius:10px;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .15s,opacity .15s}
#snd:hover{background:#79b8ff}#snd:disabled{opacity:.4;cursor:default}
.ht{font-size:11px;color:var(--m);padding:4px 4px 0;text-align:center}

/* Pending bar */
.pending-bar{position:fixed;bottom:80px;left:50%;transform:translateX(-50%);background:var(--s);border:1px solid var(--bd);padding:8px 16px;border-radius:20px;font-size:12px;color:var(--m);display:flex;align-items:center;gap:8px;z-index:10}
.pending-dot{width:8px;height:8px;border-radius:50%;background:var(--a);animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* Prompt overlay */
.prompt-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:200;backdrop-filter:blur(4px);animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.prompt-card{background:var(--b2);border:1px solid var(--bd);border-radius:16px;padding:24px;max-width:420px;width:90%;box-shadow:0 8px 32px rgba(0,0,0,.4);animation:slideUp .25s ease}
@keyframes slideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.prompt-icon{font-size:28px;margin-bottom:12px;text-align:center}
.prompt-message{font-size:14px;line-height:1.6;color:var(--t);margin-bottom:20px;text-align:center;word-wrap:break-word}
.prompt-options{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.prompt-btn{padding:8px 20px;border-radius:10px;border:1px solid var(--bd);background:var(--s);color:var(--t);cursor:pointer;font-size:13px;font-family:inherit;transition:all .15s;min-width:80px}
.prompt-btn:hover{background:var(--sh);border-color:var(--a)}
.prompt-btn.primary{background:var(--a);border-color:var(--a);color:#fff}
.prompt-btn.primary:hover{background:#79b8ff}
.prompt-queue{position:fixed;top:12px;right:12px;z-index:150;display:flex;flex-direction:column;gap:8px;max-width:320px}
.prompt-toast{background:var(--b2);border:1px solid var(--bd);border-radius:10px;padding:10px 14px;font-size:12px;color:var(--t2);cursor:pointer;transition:all .15s;animation:slideIn .2s ease}
.prompt-toast:hover{border-color:var(--a);background:var(--sh)}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}

/* Mobile */
@media(max-width:768px){
  #sidebar{position:fixed;left:0;top:0;bottom:0;z-index:100;box-shadow:4px 0 20px rgba(0,0,0,.5)}
  #sidebar.hidden{margin-left:calc(var(--sb-w) * -1)}
  .menu-btn{display:block}
  .mr{padding:14px 12px;gap:10px}
  header{padding:10px 12px}
  #ia{padding:8px 10px 10px}
  .acts{opacity:1}
}