/* ================= THEME ================= */
:root, [data-theme="light"]{
  --bg:#ffffff; --bg2:#f9fafb; --bg3:#f3f4f6; --line:#e5e7eb; --line2:#d1d5db;
  --text:#111827; --text2:#374151; --muted:#6b7280; --faint:#9ca3af;
  --accent:#ea580c; --accent-soft:#fff1e6;
  --blue:#2563eb; --blue-soft:#e0ecff; --purple:#7c3aed; --purple-soft:#efe7ff;
  --ok:#16a34a; --err:#dc2626;
  --term-bg:#0f1720; --term-text:#9be29b; --term-head:#1b2430;
  --shadow:0 8px 28px rgba(17,24,39,.10), 0 1px 3px rgba(17,24,39,.06);
  --user-bubble:#f3f4f6;
}
[data-theme="dark"]{
  --bg:#0f1115; --bg2:#151820; --bg3:#1c2029; --line:#262b36; --line2:#323947;
  --text:#e5e7eb; --text2:#cbd0d8; --muted:#8b93a1; --faint:#646c7a;
  --accent:#f97316; --accent-soft:#2a1c12;
  --blue-soft:#17233d; --purple-soft:#221a38;
  --term-bg:#0a0d12; --term-head:#141a22;
  --shadow:0 8px 28px rgba(0,0,0,.45);
  --user-bubble:#1c2029;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}
svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
button{font:inherit;color:inherit;cursor:pointer}
[hidden]{display:none!important}
.muted{color:var(--muted)} .small{font-size:12px}

/* ================= TOP BAR ================= */
.topbar{height:52px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;
  border-bottom:1px solid var(--line);background:var(--bg);position:relative;z-index:20}
.tb-left,.tb-right{display:flex;align-items:center;gap:10px}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--text)}
.brand-logo{width:26px;height:26px}
.brand-name{font-weight:700;font-size:16px;letter-spacing:.2px}
.pill{font-size:11px;font-weight:600;padding:3px 10px;border-radius:999px;color:#fff}
.pill-blue{background:var(--blue)} .pill-purple{background:var(--purple)}
.tb-icon{background:none;border:none;padding:6px;border-radius:8px;color:var(--text2);display:flex}
.tb-icon:hover{background:var(--bg3)}
.plan-badge{font-size:11px;font-weight:700;letter-spacing:1.5px;border:1px solid var(--line2);
  padding:3px 10px;border-radius:999px;color:var(--text2)}
.model-status{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.model-status i{width:7px;height:7px;border-radius:50%;background:var(--faint);display:block}
.model-status.ok i{background:var(--ok)} .model-status.bad i{background:var(--err)}
.account{position:relative}
.account-btn{display:flex;align-items:center;gap:6px;background:none;border:none;color:var(--accent);
  font-size:13px;padding:6px 8px;border-radius:8px}
.account-btn:hover{background:var(--accent-soft)}
.account-btn .chev{width:14px;height:14px}

.menu{position:absolute;right:0;top:calc(100% + 6px);min-width:230px;background:var(--bg);
  border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:6px;z-index:50}
.menu button{display:block;width:100%;text-align:left;background:none;border:none;padding:8px 10px;
  border-radius:8px;font-size:13px}
.menu button:hover{background:var(--bg3)}
.menu-head{padding:8px 10px 10px;border-bottom:1px solid var(--line);margin-bottom:4px;font-size:13px;
  word-break:break-all}

/* ================= LAYOUT ================= */
.layout{display:flex;height:calc(100vh - 52px);position:relative}
.sidebar{width:260px;flex:none;border-right:1px solid var(--line);background:var(--bg);
  display:flex;flex-direction:column;transition:margin .2s}
.layout.collapsed .sidebar{margin-left:-260px}
.sidebar-toggle{position:absolute;left:260px;top:50%;transform:translate(-50%,-50%);z-index:5;
  width:22px;height:44px;border-radius:6px;border:1px solid var(--line);background:var(--bg);
  display:flex;align-items:center;justify-content:center;color:var(--muted);transition:left .2s;padding:0}
.layout.collapsed .sidebar-toggle{left:11px}
.layout.collapsed .sidebar-toggle svg{transform:rotate(180deg)}
.new-session{margin:12px;display:flex;align-items:center;gap:8px;background:var(--bg);
  border:1px solid var(--line);border-radius:10px;padding:9px 12px;font-size:13px;font-weight:500}
.new-session:hover{background:var(--bg2);border-color:var(--line2)}
.session-list{flex:1;overflow-y:auto;padding:0 8px}
.s-item{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:8px;font-size:13px;
  color:var(--text2);cursor:pointer;position:relative}
.s-item:hover{background:var(--bg3)}
.s-item.active{background:var(--bg3);color:var(--text);font-weight:500}
.s-item .t{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.s-item svg{width:14px;height:14px;color:var(--muted)}
.s-item .del{opacity:0;background:none;border:none;padding:2px;color:var(--faint);display:flex}
.s-item:hover .del{opacity:1}
.s-item .del:hover{color:var(--err)}
.s-item .live{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 1.2s infinite}
.s-group{font-size:11px;color:var(--faint);padding:10px 10px 4px;text-transform:uppercase;letter-spacing:.6px}
.sidebar-foot{border-top:1px solid var(--line);padding:10px 14px;font-size:11.5px;color:var(--muted)}

/* ================= CHAT ================= */
.chat{flex:1;min-width:0;display:flex;flex-direction:column;position:relative}
.scroll{flex:1;overflow-y:auto}
.thread{max-width:780px;margin:0 auto;padding:28px 28px 40px}
.welcome{text-align:center;margin-top:12vh}
.welcome img{width:56px;height:56px}
.welcome h1{font-size:26px;margin:14px 0 6px;font-weight:650;letter-spacing:-.3px}
.welcome p{color:var(--muted);margin:0 auto;max-width:520px}
.suggest{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:28px auto 0;max-width:640px}
.suggest button{text-align:left;background:var(--bg);border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;font-size:13px;color:var(--text2);line-height:1.45}
.suggest button:hover{border-color:var(--line2);background:var(--bg2)}
.suggest b{display:block;color:var(--text);font-weight:600;margin-bottom:2px}

.m-user{display:flex;justify-content:flex-end;margin:6px 0 22px}
.m-user .bubble{background:var(--user-bubble);border-radius:16px 16px 4px 16px;padding:10px 14px;
  max-width:85%;white-space:pre-wrap;word-wrap:break-word}
.m-user .att{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end;margin-top:6px}

.m-bot{margin:0 0 26px}
.md{word-wrap:break-word;overflow-wrap:anywhere;color:var(--text)}
.md>*:first-child{margin-top:0}
.md p{margin:.45em 0}
.md ul,.md ol{padding-left:1.4em;margin:.4em 0}
.md li{margin:.2em 0}
.md h1,.md h2,.md h3{line-height:1.3;margin:1em 0 .4em;letter-spacing:-.2px}
.md h1{font-size:20px} .md h2{font-size:17px} .md h3{font-size:15px}
.md code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;
  background:var(--bg3);padding:1.5px 5px;border-radius:5px}
.md pre{background:var(--term-bg);color:#e5e7eb;border-radius:10px;padding:12px 14px;overflow-x:auto;font-size:12.5px}
.md pre code{background:none;padding:0;color:inherit}
.md table{border-collapse:collapse;margin:.6em 0;font-size:13px;display:block;overflow-x:auto}
.md th,.md td{border:1px solid var(--line);padding:6px 10px;text-align:left}
.md th{background:var(--bg2)}
.md a{color:var(--blue)}
.md blockquote{margin:.5em 0;padding-left:12px;border-left:3px solid var(--line2);color:var(--muted)}
.md img{max-width:100%;border-radius:8px}

.steps{margin:10px 0;display:flex;flex-direction:column;gap:4px}
.step{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);padding:5px 10px;
  border:1px solid var(--line);border-radius:8px;background:var(--bg2);cursor:pointer;max-width:100%}
.step:hover{border-color:var(--line2)}
.step .nm{font-family:ui-monospace,Menlo,monospace;color:var(--text2);font-weight:600}
.step .ar{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-family:ui-monospace,Menlo,monospace}
.step .st{color:var(--ok)}
.status-line{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;margin:8px 0}
.dots{display:inline-flex;gap:3px}
.dots i{width:5px;height:5px;border-radius:50%;background:var(--accent);animation:pulse 1s infinite}
.dots i:nth-child(2){animation-delay:.15s} .dots i:nth-child(3){animation-delay:.3s}
@keyframes pulse{0%,100%{opacity:.25}50%{opacity:1}}
.spinner{width:13px;height:13px;border:2px solid var(--line2);border-top-color:var(--accent);
  border-radius:50%;animation:spin .8s linear infinite;flex:none}
@keyframes spin{to{transform:rotate(360deg)}}
.err{color:var(--err);font-size:13px;margin:8px 0}

.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px;margin:12px 0}
.gallery figure{margin:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--bg2);cursor:zoom-in}
.gallery img{display:block;width:100%;height:170px;object-fit:cover}
.gallery figcaption{font-size:11.5px;color:var(--muted);padding:5px 8px}
.files-h{font-size:11px;font-weight:600;color:var(--faint);letter-spacing:.8px;margin:14px 0 6px}
.files{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:8px;
  padding:6px 10px;font-size:12.5px;color:var(--text2);text-decoration:none;background:var(--bg)}
.chip:hover{border-color:var(--line2);background:var(--bg2)}
.chip svg{width:14px;height:14px;color:var(--ok)}
.chip .sz{color:var(--faint);font-size:11.5px}
.chip .x{border:none;background:none;padding:0 0 0 4px;color:var(--faint)}

/* ================= COMPOSER ================= */
.composer-wrap{padding:0 28px 12px;max-width:836px;margin:0 auto;width:100%}
.composer{border:1px solid var(--line);border-radius:16px;background:var(--bg);box-shadow:var(--shadow);padding:10px 10px 8px}
.composer:focus-within{border-color:var(--line2)}
.attach-row{display:flex;flex-wrap:wrap;gap:6px;padding:0 4px}
.attach-row:not(:empty){margin-bottom:6px}
#input{width:100%;border:none;outline:none;resize:none;background:none;color:var(--text);
  font:inherit;font-size:14px;padding:4px 6px;max-height:240px}
#input::placeholder{color:var(--faint)}
.composer-bar{display:flex;align-items:center;gap:6px;margin-top:4px}
.cb-icon{width:30px;height:30px;border-radius:8px;border:none;background:none;display:flex;
  align-items:center;justify-content:center;color:var(--text2)}
.cb-icon:hover{background:var(--bg3)}
.seg{display:flex;gap:2px}
.seg button{display:flex;align-items:center;gap:5px;border:none;background:none;padding:5px 9px;
  border-radius:8px;font-size:12.5px;color:var(--muted)}
.seg button svg{width:14px;height:14px}
.seg button:hover{background:var(--bg3)}
.seg button.on{background:var(--bg3);color:var(--text);font-weight:500}
.new{font-size:9px;font-weight:700;background:#dcfce7;color:#15803d;padding:1px 5px;border-radius:4px}
.spacer{flex:1}
.depth{position:relative}
.depth-btn{display:flex;align-items:center;gap:5px;border:none;background:none;padding:5px 8px;
  border-radius:8px;font-size:12.5px;color:var(--text2)}
.depth-btn:hover{background:var(--bg3)}
.depth-btn .chev{width:13px;height:13px}
.depth-menu{bottom:calc(100% + 8px);top:auto;min-width:250px}
.depth-menu button{display:flex;flex-direction:column;gap:1px}
.depth-menu button.on{background:var(--bg3)}
.depth-menu small{color:var(--muted);font-size:11.5px}
.send{width:32px;height:32px;border-radius:50%;border:none;background:var(--text);color:var(--bg);
  display:flex;align-items:center;justify-content:center}
.send:disabled{opacity:.35;cursor:default}
.send .i-stop{display:none}
.send.stop{background:var(--accent)} .send.stop .i-send{display:none} .send.stop .i-stop{display:block;fill:currentColor}
.composer-note{text-align:center;font-size:11px;color:var(--faint);margin-top:6px}

/* model picker */
.model{position:relative}
.model-btn{display:flex;align-items:center;gap:5px;border:1px solid var(--line);background:var(--bg);
  padding:5px 9px;border-radius:999px;font-size:12.5px;color:var(--text2);max-width:190px}
.model-btn:hover{border-color:var(--line2)}
.model-btn svg:first-child{color:var(--accent);width:14px;height:14px}
.model-btn .chev{width:13px;height:13px;color:var(--muted)}
.model-btn #modelLabel{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.model-menu{bottom:calc(100% + 8px);top:auto;right:0;min-width:290px;max-height:60vh;overflow:hidden;
  display:flex;flex-direction:column;padding:8px}
.model-menu #modelSearch{border:1px solid var(--line);border-radius:8px;padding:7px 10px;font:inherit;
  font-size:13px;background:var(--bg2);color:var(--text);outline:none;margin-bottom:6px}
.model-menu #modelSearch:focus{border-color:var(--accent)}
#modelList{overflow-y:auto}
.m-group{font-size:10.5px;color:var(--faint);letter-spacing:.7px;text-transform:uppercase;padding:8px 8px 3px}
.m-opt{display:flex;align-items:center;gap:9px;width:100%;text-align:left;border:none;background:none;
  padding:8px;border-radius:8px}
.m-opt:hover{background:var(--bg3)}
.m-opt.on{background:var(--accent-soft)}
.m-opt .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);flex:none}
.m-opt.off{opacity:.45}
.m-opt.off .dot{background:var(--faint)}
.m-opt .mt{flex:1;min-width:0}
.m-opt .mt b{display:block;font-size:13px;font-weight:600}
.m-opt .mt small{color:var(--muted);font-size:11.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.m-opt .tag{font-size:9px;font-weight:700;padding:1px 5px;border-radius:4px;background:var(--bg3);color:var(--muted)}
.m-opt .tag.uncensored{background:#fde2e1;color:#b91c1c}
.m-opt .tag.vision{background:#e0ecff;color:#1d4ed8}
.m-opt .tag.code{background:#dcfce7;color:#15803d}
[data-theme="dark"] .m-opt .tag.uncensored{background:#3a1a1a;color:#fca5a5}
[data-theme="dark"] .m-opt .tag.vision{background:#17233d;color:#93c5fd}
[data-theme="dark"] .m-opt .tag.code{background:#13291b;color:#86efac}

/* ================= WORKFLOW PANEL ================= */
.workflow{position:absolute;right:16px;top:14px;width:400px;max-height:calc(100% - 140px);
  background:var(--bg);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;z-index:10;overflow:hidden}
.wf-tabs{display:flex;align-items:center;gap:2px;padding:6px;border-bottom:1px solid var(--line)}
.wf-tab{display:flex;align-items:center;gap:6px;border:none;background:none;padding:5px 10px;
  border-radius:8px;font-size:12.5px;color:var(--muted)}
.wf-tab:hover{background:var(--bg3)}
.wf-tab.on{color:var(--text);background:var(--bg3);font-weight:500}
.wf-count{font-size:11px;color:var(--faint);margin-left:4px}
.wf-close{margin-left:auto;border:none;background:none;padding:5px;border-radius:8px;color:var(--muted);display:flex}
.wf-close:hover{background:var(--bg3)}
.wf-body{overflow-y:auto;padding:8px;display:flex;flex-direction:column;gap:8px}
.wf-empty{color:var(--faint);font-size:12.5px;text-align:center;padding:26px 10px}
.wf-open{position:absolute;right:16px;top:14px;z-index:10;width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:var(--bg);box-shadow:var(--shadow);display:flex;
  align-items:center;justify-content:center;color:var(--text2)}
.term{border-radius:10px;overflow:hidden;background:var(--term-bg);border:1px solid #1f2937;flex:none}
.term-h{display:flex;align-items:center;gap:8px;padding:7px 10px;background:var(--term-head);
  color:#cbd5e1;font-family:ui-monospace,Menlo,monospace;font-size:11.5px}
.term-h .c{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.term-h .ok{color:#4ade80} .term-h svg{width:13px;height:13px}
.term pre{margin:0;padding:8px 10px;color:var(--term-text);font-family:ui-monospace,Menlo,monospace;
  font-size:11.5px;line-height:1.5;white-space:pre-wrap;word-break:break-word;max-height:220px;overflow-y:auto}
.term.flash{outline:2px solid var(--accent)}
.wf-file{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;padding:8px;
  text-decoration:none;color:var(--text2);font-size:12.5px}
.wf-file:hover{background:var(--bg2)}
.wf-file img{width:44px;height:44px;object-fit:cover;border-radius:6px}
.wf-file .ic{width:44px;height:44px;border-radius:6px;background:var(--bg3);display:flex;align-items:center;justify-content:center}
.wf-file .n{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* when the workflow panel is visible, shift the chat column clear of it */
@media (min-width:1150px){ .layout.wf-visible .chat{padding-right:420px} }
.steps-h{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted);background:none;border:none;
  padding:2px 0;margin-bottom:2px}
.steps-h:hover{color:var(--text)}
.steps-h .st{color:var(--ok);display:flex}
.steps-h .chev{width:13px;height:13px;transition:transform .15s}
.steps.collapsed .steps-h .chev{transform:rotate(-90deg)}
.steps.collapsed .steps-list{display:none}
.steps-list{display:flex;flex-direction:column;gap:4px}
.term-h .tn{color:#f59e0b;font-weight:600}
@media (max-width:1100px){ .workflow{width:340px} }
@media (max-width:900px){
  .sidebar{position:absolute;z-index:30;height:100%;box-shadow:var(--shadow)}
  .workflow{left:12px;right:12px;width:auto}
  .suggest{grid-template-columns:1fr}
  .pill,.plan-badge,.model-status span{display:none}
}

/* ================= MODAL / LIGHTBOX ================= */
.modal-bg{position:fixed;inset:0;background:rgba(17,24,39,.45);display:flex;align-items:center;
  justify-content:center;z-index:100;backdrop-filter:blur(3px)}
.modal{background:var(--bg);border-radius:16px;padding:28px;width:360px;max-width:92vw;
  box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;text-align:center}
.modal-logo{width:44px;height:44px;margin:0 auto}
.modal h2{margin:4px 0 0;font-size:19px}
.modal p{margin:0 0 6px}
.modal input{border:1px solid var(--line);border-radius:10px;padding:10px 12px;font:inherit;
  background:var(--bg);color:var(--text);outline:none}
.modal input:focus{border-color:var(--accent)}
.btn-primary{background:var(--text);color:var(--bg);border:none;border-radius:10px;padding:10px;font-weight:600}
.btn-primary:disabled{opacity:.5}
.auth-err{color:var(--err);font-size:12.5px;min-height:16px}
.modal a{color:var(--accent)}
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.82);display:flex;align-items:center;
  justify-content:center;z-index:120;cursor:zoom-out}
.lightbox img{max-width:92vw;max-height:92vh;border-radius:8px}