:root{
  --bg:#f5f6f8; --panel:#ffffff; --ink:#0d1b2a; --muted:#5d6b7a; --line:#e3e7ec;
  --side:#0b1726; --side-ink:#c9d4e0; --side-active:#16304d;
  --accent:#0e8f86; --accent-ink:#ffffff; --accent-soft:#e2f4f2;
  --warn:#b7791f; --warn-soft:#fdf3e1; --danger:#b42318; --danger-soft:#fdecea;
  --violet:#5b4bc4; --violet-soft:#eeebfb; --ok:#1f7a3f; --ok-soft:#e5f5ea;
  --radius:10px; --shadow:0 1px 2px rgba(13,27,42,.06),0 4px 16px rgba(13,27,42,.05);
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0c1520; --panel:#121e2c; --ink:#e6edf4; --muted:#93a3b5; --line:#22324a;
    --side:#08111b; --side-ink:#a9b8c8; --side-active:#15283f;
    --accent:#23b3a8; --accent-soft:#103633; --warn-soft:#3a2c12; --danger-soft:#3b1714;
    --violet-soft:#26214a; --ok-soft:#12321f; --shadow:none;
  }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 Inter,system-ui,sans-serif}
h1,h2,h3{font-family:"Source Serif 4",Georgia,serif;font-weight:600;letter-spacing:-.01em;margin:0 0 .4em}
h1{font-size:26px} h2{font-size:19px} h3{font-size:16px}
a{color:var(--accent)}
.hidden{display:none!important}
.muted{color:var(--muted)} .small{font-size:12px} .err{color:var(--danger);min-height:1em}
.mono{font-family:ui-monospace,Menlo,monospace;font-size:12px;word-break:break-all}
.grid>*,.split>*{min-width:0}

/* login */
.login{min-height:100vh;display:grid;place-items:center;padding:16px}
.login-card{background:var(--panel);padding:32px;border-radius:14px;box-shadow:var(--shadow);width:100%;max-width:380px;display:grid;gap:12px;border:1px solid var(--line)}
.brand-mark{width:44px;height:44px;border-radius:11px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:700;font-size:20px}
.brand-mark.sm{width:32px;height:32px;font-size:15px;border-radius:8px}

/* shell */
.shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.side{background:var(--side);color:var(--side-ink);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow:auto}
.brand{display:flex;gap:10px;align-items:center;padding:18px 16px}
.brand strong{color:#fff;display:block} .brand span{font-size:12px;opacity:.7}
.side nav{display:flex;flex-direction:column;padding:4px 8px;gap:1px;flex:1}
.side nav a{color:var(--side-ink);text-decoration:none;padding:8px 10px;border-radius:7px;display:flex;justify-content:space-between;align-items:center}
.side nav a:hover{background:rgba(255,255,255,.05)}
.side nav a.active{background:var(--side-active);color:#fff}
.nav-sep{font-size:11px;text-transform:uppercase;letter-spacing:.08em;opacity:.5;padding:14px 10px 4px}
.badge{background:var(--danger);color:#fff;border-radius:99px;font-size:11px;padding:1px 7px;font-weight:600}
.side-foot{padding:14px 16px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;font-size:12px}
.link{background:none;border:0;color:inherit;text-decoration:underline;cursor:pointer;font:inherit;padding:0}
.view{padding:28px 32px;max-width:1280px;width:100%}
.head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.head p{margin:0}

/* components */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))} .g3{grid-template-columns:repeat(3,minmax(0,1fr))} .g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.kpi .v{font-size:28px;font-weight:700;font-family:"Source Serif 4",serif} .kpi .l{color:var(--muted);font-size:12px}
.btn{border:1px solid var(--line);background:var(--panel);color:var(--ink);padding:7px 13px;border-radius:8px;cursor:pointer;font:inherit;font-weight:500;white-space:nowrap;text-decoration:none;display:inline-block}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.danger{color:var(--danger)} .btn.sm{padding:4px 9px;font-size:12px}
.btn:disabled{opacity:.5;cursor:wait}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.spread{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
input,select,textarea{font:inherit;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:7px 10px;width:100%}
textarea{min-height:110px;resize:vertical;line-height:1.5}
label{display:grid;gap:4px;font-size:12px;color:var(--muted);font-weight:500}
.form{display:grid;gap:12px}
table{width:100%;border-collapse:collapse}
th{text-align:left;font-size:12px;color:var(--muted);font-weight:500;padding:8px;border-bottom:1px solid var(--line)}
td{padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
tr.click{cursor:pointer} tr.click:hover td{background:var(--bg)}
.pill{display:inline-block;padding:2px 8px;border-radius:99px;font-size:11px;font-weight:600;background:var(--bg);color:var(--muted);border:1px solid var(--line)}
.pill.ok{background:var(--ok-soft);color:var(--ok);border-color:transparent}
.pill.warn{background:var(--warn-soft);color:var(--warn);border-color:transparent}
.pill.danger{background:var(--danger-soft);color:var(--danger);border-color:transparent}
.pill.accent{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.pill.violet{background:var(--violet-soft);color:var(--violet);border-color:transparent}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap}
.tabs button{background:none;border:0;padding:8px 12px;cursor:pointer;font:inherit;color:var(--muted);border-bottom:2px solid transparent}
.tabs button.on{color:var(--ink);border-color:var(--accent);font-weight:600}
.empty{padding:28px;text-align:center;color:var(--muted)}
.alert{padding:10px 12px;border-radius:8px;background:var(--warn-soft);color:var(--warn);font-size:13px}
.alert.danger{background:var(--danger-soft);color:var(--danger)}
.alert.info{background:var(--accent-soft);color:var(--accent)}

/* conversation */
.thread{display:flex;flex-direction:column;gap:10px}
.msg{max-width:78%;padding:10px 13px;border-radius:12px;white-space:pre-wrap;word-wrap:break-word;border:1px solid var(--line)}
.msg.in{background:var(--panel);align-self:flex-start}
.msg.out{background:var(--accent-soft);align-self:flex-end;border-color:transparent}
.msg.draft{background:var(--warn-soft);border:1px dashed var(--warn);align-self:flex-end;width:78%;white-space:normal}
.msg.rejete{opacity:.45;text-decoration:line-through}
.msg .meta{font-size:11px;color:var(--muted);margin-top:6px;white-space:normal}
.split{display:grid;grid-template-columns:1fr 320px;gap:16px;align-items:start}
.kv{display:grid;grid-template-columns:110px 1fr;gap:4px 8px;font-size:13px}
.kv dt{color:var(--muted)} .kv dd{margin:0}
.pipeline{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.stage{background:var(--bg);border-radius:8px;padding:10px;text-align:center}
.stage b{display:block;font-size:22px;font-family:"Source Serif 4",serif}
.bars{display:flex;align-items:flex-end;gap:10px;height:140px;padding-top:8px}
.bar{flex:1;max-width:56px;display:flex;flex-direction:column;justify-content:flex-end;gap:2px;align-items:stretch;height:100%}
.bar i{display:block;border-radius:3px 3px 0 0;min-height:2px}
.bar span{font-size:11px;color:var(--muted);text-align:center}
.legend{display:flex;gap:14px;font-size:12px;color:var(--muted)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px;vertical-align:-1px}
.agent{display:grid;gap:10px}
.agent .top{display:flex;justify-content:space-between;align-items:start;gap:8px}
.switch{position:relative;width:38px;height:22px;flex:none}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:var(--line);border-radius:99px;cursor:pointer;transition:.2s}
.switch span:before{content:"";position:absolute;width:16px;height:16px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked+span{background:var(--accent)}
.switch input:checked+span:before{transform:translateX(16px)}
.pre{white-space:pre-wrap;background:var(--bg);border-radius:8px;padding:12px;font-size:13px;max-height:420px;overflow:auto}
.flow{display:flex;gap:6px;align-items:center;flex-wrap:wrap;font-size:12px}
.flow span{background:var(--bg);padding:5px 9px;border-radius:6px}
.flow em{color:var(--muted);font-style:normal}

/* modal & toast */
.modal{position:fixed;inset:0;background:rgba(5,12,20,.55);display:grid;place-items:center;padding:16px;z-index:20}
.modal-card{background:var(--panel);border-radius:14px;padding:22px;width:100%;max-width:720px;max-height:90vh;overflow:auto;border:1px solid var(--line)}
.toast{position:fixed;bottom:20px;right:20px;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:9px;z-index:30;max-width:420px}

@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .side{position:static;height:auto}
  .side nav{flex-direction:row;overflow-x:auto;flex-wrap:nowrap}
  .side nav a{white-space:nowrap} .nav-sep{display:none}
  .view{padding:18px 16px}
  .g2,.g3,.g4,.split{grid-template-columns:1fr}
  .pipeline{grid-template-columns:repeat(3,1fr)}
  .msg,.msg.draft{max-width:100%;width:auto}
}
input[type=range]{accent-color:var(--accent);padding:0;border:0;background:none}
input[type=checkbox]{accent-color:var(--accent)}

.side nav a.nav-cta{background:var(--accent);color:#fff;font-weight:600;margin:4px 0 6px}
.side nav a.nav-cta.active{background:var(--accent);box-shadow:inset 0 0 0 2px rgba(255,255,255,.35)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:99px;padding:5px 11px;cursor:pointer;user-select:none;background:var(--panel);font-size:13px;color:var(--ink)}
.chip input{display:none}
.chip.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:600}
.chip.locked{opacity:.55;cursor:not-allowed}
.chip .dot{width:7px;height:7px;border-radius:50%;background:var(--line)} .chip .dot.ok{background:var(--ok)}
.variant{display:grid;gap:8px}
.variant .spread b{font-size:13px}
.count{font-size:11px;color:var(--muted)} .count.over{color:var(--danger);font-weight:600}
iframe.doc{width:100%;height:70vh;border:1px solid var(--line);border-radius:8px;background:#fff}
.steps{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 14px}
.steps span{padding:4px 10px;border-radius:99px;background:var(--bg);font-size:12px;color:var(--muted)}
.steps span.done{background:var(--ok-soft);color:var(--ok)} .steps span.now{background:var(--accent);color:#fff}