:root{
    --navy:#0f172a; --navy2:#1e293b; --gold:#f59e0b; --gold2:#fbbf24;
    --bg:#f1f5f9; --card:#ffffff; --line:#e2e8f0; --text:#1e293b; --muted:#64748b;
    --ok:#16a34a; --okbg:#dcfce7; --warn:#d97706; --warnbg:#fef3c7; --danger:#dc2626; --dangerbg:#fee2e2;
    --info:#0891b2; --infobg:#cffafe; --accent:#4f46e5;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  body{font-family:'Inter','Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:13.5px;line-height:1.5;}
  a{color:inherit;}
  /* layout */
  .app{display:flex;min-height:100vh;}
  .sidebar{width:230px;background:var(--navy);color:#cbd5e1;flex-shrink:0;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;}
  .brand{padding:18px 18px 14px;border-bottom:1px solid #23324a;}
  .brand .logo{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--navy2),#334155);display:flex;align-items:center;justify-content:center;font-weight:900;color:var(--gold);letter-spacing:1px;font-size:15px;margin-bottom:8px;}
  .brand h1{font-size:14px;color:#fff;font-weight:700;letter-spacing:.3px;}
  .brand .sub{font-size:10px;color:#94a3b8;letter-spacing:1px;text-transform:uppercase;margin-top:2px;}
  .nav{padding:10px 0;overflow-y:auto;flex:1;}
  .nav a{display:flex;align-items:center;gap:10px;padding:9px 18px;font-size:13px;cursor:pointer;border-left:3px solid transparent;color:#cbd5e1;}
  .nav a:hover{background:#16233a;color:#fff;}
  .nav a.active{background:#16233a;border-left-color:var(--gold);color:#fff;font-weight:600;}
  .nav a .ic{width:18px;text-align:center;opacity:.9;}
  .nav .grp{font-size:9.5px;letter-spacing:1.5px;color:#5b6b85;text-transform:uppercase;padding:12px 18px 5px;}
  .sb-foot{padding:12px 18px;border-top:1px solid #23324a;font-size:10.5px;color:#8195b3;}
  /* main */
  .main{flex:1;min-width:0;display:flex;flex-direction:column;}
  .topbar{background:var(--card);border-bottom:1px solid var(--line);padding:12px 24px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:20;}
  .topbar .tt{font-size:16px;font-weight:700;color:var(--navy);}
  .topbar .rt{display:flex;align-items:center;gap:14px;font-size:12px;color:var(--muted);}
  .badge-demo{background:var(--gold);color:#fff;font-weight:700;font-size:10px;letter-spacing:1px;padding:3px 9px;border-radius:20px;}
  .content{padding:22px 24px;max-width:1180px;width:100%;}
  /* cards */
  .card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:18px;}
  .card h2{font-size:14px;color:var(--navy);margin-bottom:12px;display:flex;align-items:center;gap:8px;justify-content:space-between;}
  .card h2 .t{display:flex;align-items:center;gap:8px;}
  .grid{display:grid;gap:14px;}
  .kpis{grid-template-columns:repeat(auto-fit,minmax(155px,1fr));}
  .kpi{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;position:relative;overflow:hidden;}
  .kpi .lab{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;}
  .kpi .val{font-size:23px;font-weight:800;color:var(--navy);margin-top:4px;}
  .kpi .sub{font-size:11px;color:var(--muted);margin-top:2px;}
  .kpi .bar{position:absolute;left:0;top:0;bottom:0;width:4px;}
  /* tables */
  table{width:100%;border-collapse:collapse;font-size:12.5px;}
  th{text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);padding:8px 10px;border-bottom:2px solid var(--line);white-space:nowrap;}
  td{padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:middle;}
  tr:last-child td{border-bottom:none;}
  tbody tr:hover{background:#f8fafc;}
  .num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap;}
  /* pills */
  .pill{display:inline-block;font-size:10.5px;font-weight:600;padding:2px 9px;border-radius:20px;white-space:nowrap;}
  .p-ok{background:var(--okbg);color:var(--ok);}
  .p-warn{background:var(--warnbg);color:var(--warn);}
  .p-danger{background:var(--dangerbg);color:var(--danger);}
  .p-info{background:var(--infobg);color:var(--info);}
  .p-mut{background:#eef2f7;color:#64748b;}
  /* buttons */
  .btn{display:inline-flex;align-items:center;gap:6px;border:none;border-radius:8px;padding:7px 13px;font-size:12.5px;font-weight:600;cursor:pointer;background:var(--navy);color:#fff;transition:.15s;font-family:inherit;}
  .btn:hover{background:#1d2b45;}
  .btn:active{transform:translateY(1px);}
  .btn.gold{background:var(--gold);}.btn.gold:hover{background:#e08c07;}
  .btn.ghost{background:#eef2f7;color:var(--navy);}.btn.ghost:hover{background:#e2e8f0;}
  .btn.danger{background:var(--danger);}.btn.danger:hover{background:#b91c1c;}
  .btn.ok{background:var(--ok);}.btn.ok:hover{background:#15803d;}
  .btn.sm{padding:4px 9px;font-size:11px;border-radius:6px;}
  .row{display:flex;gap:14px;flex-wrap:wrap;}
  .col{flex:1;min-width:0;}
  .inp,select{font-family:inherit;font-size:12.5px;padding:7px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text);}
  label.fl{display:block;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;margin-bottom:4px;}
  /* BOM tree */
  .bom-wrap{display:grid;grid-template-columns:minmax(320px,1fr) minmax(300px,1.05fr);gap:16px;}
  @media(max-width:900px){.bom-wrap{grid-template-columns:1fr;} .sidebar{width:64px;} .brand h1,.brand .sub,.nav a span.lbl,.nav .grp,.sb-foot{display:none;} .nav a{justify-content:center;}}
  .tree{font-size:12.5px;}
  .tnode{border:1px solid var(--line);border-radius:9px;margin:5px 0;background:#fff;}
  .tnode .thead{display:flex;align-items:center;gap:8px;padding:8px 10px;cursor:pointer;}
  .tnode .thead:hover{background:#f8fafc;}
  .tnode.sel{border-color:var(--gold);box-shadow:0 0 0 2px #fde9c3;}
  .lvtag{font-size:9px;font-weight:800;letter-spacing:.5px;color:#fff;border-radius:5px;padding:2px 6px;flex-shrink:0;}
  .lv0{background:var(--accent);}.lv1{background:var(--info);}.lv2{background:var(--warn);}.lv3{background:#94a3b8;}
  .tw{color:var(--muted);font-size:11px;}
  .caret{width:14px;display:inline-block;transition:.15s;color:var(--muted);flex-shrink:0;}
  .caret.open{transform:rotate(90deg);}
  .children{padding-left:20px;border-left:1px dashed var(--line);margin-left:16px;}
  .chip{display:inline-block;font-size:10px;background:#f1f5f9;border:1px solid var(--line);border-radius:6px;padding:1px 6px;margin:1px 2px;color:#475569;}
  .costrow{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px dashed var(--line);font-size:12.5px;}
  .costrow.tot{border-bottom:none;border-top:2px solid var(--navy);margin-top:4px;padding-top:8px;font-weight:800;font-size:14px;color:var(--navy);}
  .mono{font-variant-numeric:tabular-nums;}
  /* machine cards */
  .mgrid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));}
  .mcard{border:1px solid var(--line);border-radius:11px;padding:13px 14px;background:#fff;position:relative;}
  .mcard .mtop{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:8px;}
  .mcard .mn{font-weight:700;color:var(--navy);font-size:13.5px;}
  .mcard .mc{font-size:10.5px;color:var(--muted);}
  .prog{height:6px;background:#eef2f7;border-radius:6px;overflow:hidden;margin:7px 0 4px;}
  .prog>i{display:block;height:100%;border-radius:6px;}
  .mline{font-size:11.5px;color:var(--muted);display:flex;justify-content:space-between;padding:2px 0;}
  .mact{display:flex;gap:6px;margin-top:10px;}
  /* toast */
  #toast{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:8px;z-index:100;}
  .toast{background:var(--navy);color:#fff;padding:10px 15px;border-radius:9px;font-size:12.5px;box-shadow:0 8px 24px rgba(15,23,42,.25);border-left:4px solid var(--gold);animation:sl .25s;max-width:320px;}
  .toast.ok{border-left-color:var(--ok);}.toast.danger{border-left-color:var(--danger);}.toast.warn{border-left-color:var(--warn);}
  @keyframes sl{from{transform:translateX(30px);opacity:0}to{transform:none;opacity:1}}
  .hint{font-size:11.5px;color:var(--muted);background:#f8fafc;border:1px dashed var(--line);border-radius:8px;padding:8px 11px;margin-bottom:12px;}
  .flex-b{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;}
  .sec-note{font-size:11px;color:var(--muted);}
  .dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:5px;}

/* ---------- additions for the real app (login, forms, empty states) ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--navy);padding:24px;}
.login-card{background:var(--card);border-radius:16px;padding:30px 28px;width:100%;max-width:380px;box-shadow:0 24px 60px rgba(15,23,42,.35);}
.login-card .logo{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--navy2),#334155);display:flex;align-items:center;justify-content:center;font-weight:900;color:var(--gold);font-size:17px;letter-spacing:1px;margin-bottom:14px;}
.login-card h1{font-size:18px;color:var(--navy);margin-bottom:2px;}
.login-card p.sub{font-size:12px;color:var(--muted);margin-bottom:18px;}
label.fl{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin:12px 0 5px;}
input.fi,select.fi,textarea.fi{width:100%;border:1px solid var(--line);border-radius:8px;padding:9px 11px;font-size:13px;font-family:inherit;color:var(--text);background:#fff;}
input.fi:focus,select.fi:focus,textarea.fi:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,70,229,.12);}
.btn.block{width:100%;justify-content:center;margin-top:18px;padding:10px;}
.err{background:var(--dangerbg);color:var(--danger);font-size:12px;padding:8px 11px;border-radius:8px;margin-top:12px;}
.okmsg{background:var(--okbg);color:var(--ok);font-size:12px;padding:8px 11px;border-radius:8px;margin-top:12px;}
.empty{text-align:center;color:var(--muted);font-size:12.5px;padding:26px 10px;}
.row-actions{display:flex;gap:6px;flex-wrap:wrap;}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;align-items:end;}
.sb-foot a{color:var(--gold2);text-decoration:none;}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap;}
.tabs a{padding:8px 13px;font-size:12.5px;font-weight:600;color:var(--muted);border-bottom:2px solid transparent;text-decoration:none;}
.tabs a.active{color:var(--navy);border-bottom-color:var(--gold);}
.tabs a:hover{color:var(--navy);}
@media (max-width:860px){
  .app{flex-direction:column;}
  .sidebar{width:100%;height:auto;position:static;}
  .nav{display:flex;flex-wrap:wrap;padding:6px;}
  .nav a{border-left:none;border-bottom:3px solid transparent;padding:8px 12px;}
  .nav a.active{border-left-color:transparent;border-bottom-color:var(--gold);}
  .nav .grp{display:none;}
  .content{padding:16px;}
}

/* ---------- htmx demo additions ---------- */
.wire{position:fixed;right:14px;bottom:14px;background:#0f172a;color:#cbd5e1;border-radius:10px;padding:10px 13px;font-size:11.5px;font-family:ui-monospace,Menlo,monospace;z-index:50;box-shadow:0 10px 30px rgba(15,23,42,.4);min-width:210px;}
.wire b{color:var(--gold2);}
.wire .hd{color:#8195b3;text-transform:uppercase;letter-spacing:1px;font-size:9px;margin-bottom:5px;}
.wire .ln{display:flex;justify-content:space-between;gap:12px;}
.htmx-request{opacity:.55;transition:opacity .1s;}
.treerow{cursor:pointer;}
.treerow.sel{background:#eef2ff;}
.tg{display:inline-block;width:20px;text-align:center;font-weight:700;color:var(--accent);cursor:pointer;}