:root{
  --bg:#0a0d12; --panel:#10141b; --panel-2:#161b24; --panel-3:#1c2230;
  --border:#232a36; --border-2:#2e3746;
  --text:#e6edf3; --dim:#9aa4b2; --mute:#6b7684;
  --accent:#4f8cff; --accent-2:#7c5cff;
  --green:#3fb950; --red:#f85149;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  background:var(--bg); color:var(--text);
  font:14px/1.55 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Inter,sans-serif;
  overflow:hidden;
}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#2a3242;border-radius:6px;border:2px solid transparent;background-clip:content-box}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.app{display:flex;height:100vh;overflow:hidden}
.sidebar{width:300px;flex:0 0 300px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}
.main{flex:1;min-width:0;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}
.files-panel{width:340px;flex:0 0 340px;background:var(--panel);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;transition:margin-right .2s}
.files-panel.collapsed{margin-right:-340px;visibility:hidden}
.brand{display:flex;align-items:center;gap:11px;padding:16px 16px 14px;border-bottom:1px solid var(--border);flex-shrink:0}
.logo{width:32px;height:32px;border-radius:9px;flex:0 0 32px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;font-weight:800;font-size:15px;color:#fff;box-shadow:0 4px 14px rgba(79,140,255,.3)}
.brand h1{font-size:14.5px;margin:0;font-weight:700;letter-spacing:.2px}
.brand p{margin:1px 0 0;font-size:11px;color:var(--mute)}
.sidebar-scroll{flex:1;overflow-y:auto;padding:14px 14px 40px}
.side-label{font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.9px;color:var(--mute);margin:4px 2px 9px}
.side-label:not(:first-child){margin-top:20px}
.side-help{font-size:11px;color:var(--mute);line-height:1.45;margin:-2px 2px 11px}
.btn-newchat{width:100%;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-radius:9px;padding:9px;font-size:12.5px;font-weight:700;display:flex;align-items:center;justify-content:center;gap:6px;transition:.15s;box-shadow:0 3px 12px rgba(79,140,255,.25);margin-bottom:12px}
.btn-newchat:hover{filter:brightness(1.1)}
.history-list{max-height:180px;overflow-y:auto;margin-bottom:4px}
.history-list:empty::before{content:'No chats yet.';font-size:11.5px;color:var(--mute)}
.history-item{display:flex;align-items:center;gap:6px;padding:8px 9px;border-radius:8px;cursor:pointer;transition:.12s;margin-bottom:3px}
.history-item:hover{background:var(--panel-2)}
.history-item.active{background:var(--panel-3);border:1px solid var(--border-2)}
.hi-main{flex:1;min-width:0}
.hi-title{font-size:12.5px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hi-time{font-size:10.5px;color:var(--mute);margin-top:1px}
.hi-del{width:20px;height:20px;border-radius:5px;display:grid;place-items:center;color:var(--mute);font-size:11px;flex:0 0 20px;transition:.15s}
.hi-del:hover{background:#2a1618;color:var(--red)}
.provider-card{background:var(--panel-2);border:1px solid var(--border);border-radius:10px;margin-bottom:8px;overflow:hidden;transition:.15s}
.provider-card.on{border-color:var(--border-2);background:var(--panel-3)}
.provider-head{display:flex;align-items:center;gap:9px;padding:10px 11px;cursor:pointer;user-select:none}
.provider-head:hover{background:rgba(255,255,255,.02)}
.pdot{width:8px;height:8px;border-radius:50%;flex:0 0 8px}
.pname{font-size:13px;font-weight:600;flex:1}
.psub{font-size:10.5px;color:var(--mute);font-weight:400}
.pconfig{font-size:10px;color:var(--mute);white-space:nowrap}
.pcheck{width:34px;height:19px;border-radius:10px;background:#2a3242;position:relative;transition:.18s;flex:0 0 34px}
.pcheck::after{content:'';position:absolute;top:2px;left:2px;width:15px;height:15px;border-radius:50%;background:#7d8794;transition:.18s}
.provider-card.on .pcheck{background:var(--accent)}
.provider-card.on .pcheck::after{left:17px;background:#fff}
.provider-body{padding:0 11px;max-height:0;overflow:hidden;transition:max-height .22s ease, padding .22s}
.provider-card.on .provider-body{max-height:190px;padding:0 11px 11px}
.field-label{display:block;font-size:10px;color:var(--mute);margin:0 0 4px}
.pfield{width:100%;background:#0d1117;border:1px solid var(--border);border-radius:7px;padding:7px 9px;font-size:12px;outline:none;margin-bottom:6px;transition:.15s}
.pfield:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,140,255,.13)}
.pfield.key{font-family:ui-monospace,monospace;letter-spacing:.3px}
.pfield:last-child{margin-bottom:0}
.sys-prompt{width:100%;background:var(--panel-2);border:1px solid var(--border);border-radius:9px;padding:9px 11px;font-size:12px;line-height:1.5;outline:none;resize:vertical;min-height:80px;max-height:200px;font-family:ui-monospace,monospace;transition:.15s}
.sys-prompt:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,140,255,.1)}
.side-note{font-size:11px;color:var(--mute);line-height:1.5;padding:12px 4px 0;border-top:1px solid var(--border);margin-top:16px}
.side-note b{color:var(--dim)}
.topbar{height:50px;flex:0 0 50px;border-bottom:1px solid var(--border);background:var(--panel);display:flex;align-items:center;gap:10px;padding:0 14px}
.icon-btn{display:flex;align-items:center;gap:7px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:7px 12px;font-size:12.5px;font-weight:600;color:var(--dim);transition:.15s}
.icon-btn:hover{color:var(--text);border-color:var(--border-2);background:var(--panel-3)}
.icon-btn.active{color:var(--text);border-color:var(--accent);background:#16233d}
.badge-count{background:var(--accent);color:#fff;border-radius:9px;padding:1px 7px;font-size:10.5px;font-weight:700;min-width:18px;text-align:center}
.spacer{flex:1}
.status-pill{font-size:12px;color:var(--mute);display:flex;align-items:center;gap:7px}
.spinner{width:11px;height:11px;border:2px solid #2f3947;border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;display:none}
.spinner.on{display:block}
@keyframes spin{to{transform:rotate(360deg)}}
.chat{flex:1;overflow-y:auto;padding:22px 20px 30px}
.chat-inner{max-width:1400px;margin:0 auto}
.empty-state{text-align:center;padding:60px 20px;color:var(--mute)}
.empty-state .big{font-size:34px;margin-bottom:14px;opacity:.7}
.empty-state h2{font-size:19px;color:var(--text);margin:0 0 8px;font-weight:700}
.empty-state p{font-size:13.5px;margin:0 0 22px;line-height:1.6}
.suggestions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;max-width:720px;margin:0 auto}
.suggestion{background:var(--panel-2);border:1px solid var(--border);border-radius:20px;padding:8px 15px;font-size:12.5px;color:var(--dim);transition:.15s;text-align:left}
.suggestion:hover{border-color:var(--accent);color:var(--text);background:var(--panel-3)}
.turn{margin-bottom:26px}
.user-msg{display:flex;justify-content:flex-end;margin-bottom:14px}
.user-bubble{background:linear-gradient(135deg,#2b4b8f,#3a3f9e);color:#fff;border-radius:16px 16px 4px 16px;padding:11px 16px;max-width:70%;font-size:14px;line-height:1.55;white-space:pre-wrap;word-break:break-word;box-shadow:0 4px 16px rgba(0,0,0,.25)}
.responses{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,360px),1fr));gap:14px}
.resp-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;animation:cardIn .28s ease}
@keyframes cardIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.resp-card.single{grid-column:1/-1}
.resp-head{display:flex;align-items:center;gap:9px;padding:10px 13px;border-bottom:1px solid var(--border);background:var(--panel-2)}
.resp-head .pdot{width:9px;height:9px}
.resp-name{font-size:12.5px;font-weight:700;letter-spacing:.2px}
.resp-model{font-size:11px;color:var(--mute);font-family:ui-monospace,monospace;background:var(--bg);border:1px solid var(--border);border-radius:5px;padding:1px 7px;margin-left:2px}
.resp-status{margin-left:auto;font-size:11px;color:var(--mute)}
.resp-status.streaming{color:var(--accent)}
.resp-status.done{color:var(--green)}
.resp-status.error{color:var(--red)}
.resp-content{padding:14px 15px;font-size:13px;line-height:1.65;color:#c9d5e3;overflow-wrap:break-word;word-break:break-word;max-height:560px;overflow-y:auto}
.resp-content:empty::before{content:'…';color:var(--mute)}
.resp-content p{margin:0 0 10px}
.resp-content p:last-child{margin-bottom:0}
.resp-content h1,.resp-content h2,.resp-content h3,.resp-content h4{color:var(--text);margin:14px 0 7px;font-size:13.5px;font-weight:700}
.resp-content code{background:var(--panel-3);padding:1px 5px;border-radius:4px;font-size:12px;color:#ffb86b}
.resp-content pre{background:#080b10;border:1px solid var(--border);border-radius:9px;padding:11px 13px;overflow-x:auto;margin:10px 0;font-size:12px;line-height:1.6;white-space:pre;position:relative}
.resp-content pre code{background:none;padding:0;color:#c9d5e3;font-size:12px}
.resp-content ul,.resp-content ol{margin:8px 0;padding-left:22px}
.resp-content li{margin:3px 0}
.resp-content strong{color:var(--text)}
.resp-content a{color:var(--accent)}
.resp-foot{padding:9px 13px;border-top:1px solid var(--border);background:var(--panel-2);display:flex;align-items:center;gap:7px;flex-wrap:wrap;min-height:0}
.resp-foot:empty{display:none}
.filechip{display:inline-flex;align-items:center;gap:5px;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:3px 9px;font-size:11px;font-family:ui-monospace,monospace;color:var(--dim);cursor:pointer;transition:.15s}
.filechip:hover{border-color:var(--accent);color:var(--text)}
.filechip::before{content:'📄';font-size:10px}
.composer{flex-shrink:0;padding:12px 20px 16px;border-top:1px solid var(--border);background:var(--panel)}
.composer-inner{max-width:1400px;margin:0 auto}
.composer-box{background:var(--panel-2);border:1px solid var(--border);border-radius:14px;padding:4px;transition:.15s}
.composer-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,140,255,.1)}
#promptInput{width:100%;background:transparent;border:none;outline:none;resize:none;padding:11px 13px 6px;font-size:14px;line-height:1.55;min-height:52px;max-height:220px;font-family:inherit}
#promptInput::placeholder{color:var(--mute)}
.composer-bar{display:flex;align-items:center;gap:8px;padding:4px 6px 5px 12px}
.composer-hint{font-size:11px;color:var(--mute)}
.btn-send{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-radius:9px;padding:7px 16px;font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px;transition:.15s;box-shadow:0 3px 12px rgba(79,140,255,.28)}
.btn-send:hover:not(:disabled){filter:brightness(1.1)}
.btn-send:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}
.btn-ghost{background:var(--panel-2);border:1px solid var(--border);border-radius:9px;padding:7px 13px;font-size:12.5px;font-weight:600;color:var(--dim);transition:.15s}
.btn-ghost:hover:not(:disabled){color:var(--text);border-color:var(--border-2);background:var(--panel-3)}
.btn-ghost:disabled{opacity:.4;cursor:not-allowed}
.btn-ghost.danger:hover:not(:disabled){color:var(--red);border-color:#5b2b2b;background:#2a1618}
.plan-toggle{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--dim);cursor:pointer;user-select:none}
.plan-toggle input{accent-color:var(--accent);width:14px;height:14px;cursor:pointer}
.turn-badge{display:inline-block;font-size:10px;font-weight:800;letter-spacing:.3px;background:rgba(255,255,255,.14);border-radius:6px;padding:2px 7px;margin-right:7px;vertical-align:middle}
.btn-build{background:linear-gradient(135deg,var(--green),#2ea043);color:#fff;border-radius:7px;padding:6px 12px;font-size:11.5px;font-weight:700;display:inline-flex;align-items:center;gap:5px;transition:.15s}
.btn-build:hover{filter:brightness(1.1)}
.files-head{display:flex;align-items:center;gap:9px;padding:14px 15px;border-bottom:1px solid var(--border);flex-shrink:0}
.files-head h3{margin:0;font-size:13px;font-weight:700;letter-spacing:.2px}
.files-head .count{background:var(--panel-3);border:1px solid var(--border);border-radius:9px;padding:1px 8px;font-size:11px;color:var(--dim);font-weight:600}
.files-head .close{margin-left:auto;width:26px;height:26px;border-radius:7px;display:grid;place-items:center;color:var(--mute);font-size:17px;transition:.15s}
.files-head .close:hover{background:var(--panel-2);color:var(--text)}
.files-list{flex:1;overflow-y:auto;padding:12px 12px 20px}
.files-empty{text-align:center;padding:40px 16px;color:var(--mute);font-size:12.5px;line-height:1.6}
.files-empty .ico{font-size:28px;opacity:.5;margin-bottom:10px}
.file-item{background:var(--panel-2);border:1px solid var(--border);border-radius:10px;margin-bottom:8px;overflow:hidden;transition:.15s}
.file-item:hover{border-color:var(--border-2)}
.file-item.expanded{border-color:var(--accent)}
.file-row{display:flex;align-items:center;gap:9px;padding:9px 10px;cursor:pointer;user-select:none}
.fext{width:26px;height:26px;flex:0 0 26px;border-radius:6px;display:grid;place-items:center;font-size:9px;font-weight:800;color:#fff;text-transform:uppercase;letter-spacing:.2px}
.fname{font-family:ui-monospace,monospace;font-size:11.5px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fsize{font-size:10.5px;color:var(--mute);flex-shrink:0}
.fbtns{display:flex;gap:2px;flex-shrink:0}
.fbtn{width:22px;height:22px;border-radius:5px;display:grid;place-items:center;color:var(--mute);font-size:12px;transition:.15s}
.fbtn:hover{background:var(--panel-3);color:var(--text)}
.fbtn.del:hover{color:var(--red)}
.file-preview{display:none;border-top:1px solid var(--border);background:#080b10}
.file-item.expanded .file-preview{display:block}
.file-preview pre{margin:0;padding:11px 12px;font-size:11px;line-height:1.6;font-family:ui-monospace,monospace;white-space:pre;overflow:auto;max-height:320px;color:#c9d5e3}
.files-foot{padding:12px 14px;border-top:1px solid var(--border);flex-shrink:0}
.btn-export{width:100%;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-radius:10px;padding:10px;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:7px;transition:.15s;box-shadow:0 3px 12px rgba(79,140,255,.28)}
.btn-export:hover:not(:disabled){filter:brightness(1.1)}
.btn-export:disabled{opacity:.35;cursor:not-allowed;box-shadow:none;background:var(--panel-3)}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:#1d2431;border:1px solid var(--border);border-radius:10px;padding:11px 18px;font-size:13px;opacity:0;pointer-events:none;transition:.25s;z-index:200;box-shadow:0 14px 40px rgba(0,0,0,.55);max-width:80vw;display:flex;align-items:center;gap:9px}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.err{border-color:#5b2b2b;background:#2a1618;color:#ffb4b0}
.toast.ok{border-color:#1f5c33;background:#122417}
@media (max-width:1100px){
  .files-panel{position:fixed;top:0;right:0;bottom:0;z-index:100;box-shadow:-20px 0 60px rgba(0,0,0,.5)}
  .files-panel.collapsed{margin-right:0;transform:translateX(100%);visibility:visible}
}
@media (max-width:820px){
  .app{flex-direction:column}
  .sidebar{width:100%;height:56vh;min-height:330px;max-height:none;flex:0 0 56vh;border-right:none;border-bottom:1px solid var(--border)}
  .sidebar-scroll{min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch}
  .main{min-height:44vh;flex:1 1 44vh}
  .responses{grid-template-columns:1fr}
  .chat{padding:16px 12px 24px}
  .composer{padding:10px 12px 14px}
  .user-bubble{max-width:85%}
}