:root{
    --sidebar:#222d32; --sidebar-dark:#1a2226; --sidebar-hover:#1e282c;
    --brand:#3c8dbc; --info:#00c0ef; --success:#00a65a; --danger:#dd4b39;
    --warning:#f39c12; --purple:#605ca8; --bg:#ecf0f5; --line:#e4e7ea;
    --text:#444; --muted:#8a949e; --card:#fff;
  }
  *{box-sizing:border-box}
  html,body{margin:0;padding:0}
  body{background:var(--bg);color:var(--text);font:14px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}
  a{color:var(--brand);text-decoration:none}
  .ic{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
  .ic.f{fill:currentColor;stroke:none}

  /* ---------- layout ---------- */
  .wrapper{display:flex;min-height:100vh}
  .sidebar{width:250px;background:var(--sidebar);color:#b8c7ce;flex:none;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;z-index:30}
  .main{margin-left:250px;flex:1;min-width:0;display:flex;flex-direction:column;min-height:100vh}
  .brand{background:var(--sidebar-dark);height:56px;display:flex;align-items:center;gap:10px;padding:0 16px;color:#fff;font-size:17px;letter-spacing:.3px}
  .brand b{color:#7ec8f2;font-weight:700}
  .brand .ic{width:22px;height:22px;color:#25d366}
  .brand .logo{width:26px;height:26px;border-radius:7px;display:block;box-shadow:0 1px 3px rgba(0,0,0,.35)}
  .nav-title{padding:14px 16px 6px;font-size:11px;letter-spacing:1px;color:#4b646f;font-weight:700}
  .sidebar nav a{display:flex;align-items:center;gap:11px;padding:11px 16px;color:#b8c7ce;border-left:3px solid transparent;font-size:13.5px}
  .sidebar nav a:hover{background:var(--sidebar-hover);color:#fff}
  .sidebar nav a.active{background:#1e282c;color:#fff;border-left-color:var(--brand)}

  .topbar{height:56px;background:#fff;border-bottom:1px solid #eee;display:flex;align-items:center;gap:14px;padding:0 18px;position:sticky;top:0;z-index:20}
  .crumb{font-size:13px;color:#999}
  .crumb b{color:#666;font-weight:600}
  .topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}
  .pill{font-size:12px;padding:5px 10px;border-radius:20px;background:#eef7ee;color:#2e7d32;border:1px solid #cdeccd;white-space:nowrap}
  .pill.off{background:#fdecea;color:#c0392b;border-color:#f5c6c2}
  .avatar{width:32px;height:32px;border-radius:50%;background:var(--info);color:#fff;display:grid;place-items:center;font-weight:700;font-size:13px}

  .content{padding:18px;flex:1}
  .foot{padding:12px 18px;color:#9aa4ad;font-size:12px;border-top:1px solid var(--line)}
  .page{display:none}
  .page.active{display:block}

  /* ---------- stat cards ---------- */
  .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:16px}
  .stat{background:var(--card);border-radius:3px;box-shadow:0 1px 2px rgba(0,0,0,.08);display:flex;overflow:hidden;min-height:88px}
  .stat-ico{width:74px;display:grid;place-items:center;color:#fff;flex:none}
  .stat-ico .ic{width:30px;height:30px;stroke-width:1.7}
  .stat-body{padding:12px 14px;display:flex;flex-direction:column;justify-content:center;min-width:0}
  .stat-num{font-size:21px;font-weight:600;color:#2b3d4f;line-height:1.15;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .stat-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .bg-brand{background:var(--brand)} .bg-success{background:var(--success)} .bg-info{background:var(--info)}
  .bg-warn{background:var(--warning)} .bg-danger{background:var(--danger)} .bg-purple{background:var(--purple)}
  .bg-dark{background:#35424f}

  /* ---------- cards ---------- */
  .card{background:var(--card);border-radius:3px;box-shadow:0 1px 2px rgba(0,0,0,.08);margin-bottom:16px}
  .card-head{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid #f0f1f3}
  .card-head h3{margin:0;font-size:15px;font-weight:600;color:#333;display:flex;align-items:center;gap:8px}
  .card-head .spacer{margin-left:auto}
  .card-body{padding:16px}
  .card-body.tight{padding:0}
  .row{display:flex;gap:14px;flex-wrap:wrap}
  .col{flex:1;min-width:220px}

  .note{background:#d9edf7;border:1px solid #bce8f1;color:#31708f;border-radius:3px;padding:12px 16px;margin-bottom:16px;font-size:13px}
  .note ul{margin:6px 0 0 18px;padding:0}
  .note li{margin:3px 0}
  .note.warn{background:#fcf8e3;border-color:#faebcc;color:#8a6d3b}

  /* ---------- buttons ---------- */
  .btn{display:inline-flex;align-items:center;gap:7px;border:1px solid transparent;border-radius:3px;padding:8px 13px;font-size:13px;font-weight:600;cursor:pointer;background:#f4f4f4;color:#444;white-space:nowrap}
  .btn:hover{filter:brightness(.96)}
  .btn:disabled{opacity:.55;cursor:not-allowed}
  .btn-primary{background:var(--brand);color:#fff}
  .btn-success{background:var(--success);color:#fff}
  .btn-danger{background:var(--danger);color:#fff}
  .btn-warn{background:var(--warning);color:#fff}
  .btn-info{background:var(--info);color:#fff}
  .btn-light{background:#fff;border-color:#d2d6de;color:#444}
  .btn-sm{padding:5px 9px;font-size:12px}
  .btn-block{width:100%;justify-content:center}
  .btn-icon{background:none;border:0;color:#666;cursor:pointer;padding:6px;border-radius:3px}
  .btn-icon:hover{background:#f2f2f2}

  /* ---------- forms ---------- */
  label.f{display:block;font-size:12.5px;font-weight:600;color:#555;margin-bottom:5px}
  label.f .req{color:var(--danger)}
  .input,select,textarea{width:100%;border:1px solid #d2d6de;border-radius:3px;padding:8px 10px;font-size:13.5px;color:#444;background:#fff;font-family:inherit}
  .input:focus,select:focus,textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 2px rgba(60,141,188,.12)}
  textarea{resize:vertical;min-height:90px;line-height:1.5}
  .hint{font-size:11.5px;color:var(--muted);margin-top:4px}
  .field{margin-bottom:14px}
  .grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}

  .toggle{display:inline-flex;background:#f1f3f5;border-radius:3px;padding:3px;gap:3px;flex-wrap:wrap}
  .toggle button{border:0;background:none;padding:7px 12px;font-size:12.5px;font-weight:600;color:#666;border-radius:2px;cursor:pointer}
  .toggle button.on{background:#fff;color:var(--brand);box-shadow:0 1px 2px rgba(0,0,0,.12)}

  /* ---------- tables ---------- */
  table{width:100%;border-collapse:collapse;font-size:13px}
  thead th{background:#f9fafb;text-align:left;padding:10px 12px;font-size:12px;text-transform:uppercase;letter-spacing:.3px;color:#6b7785;border-bottom:1px solid var(--line);white-space:nowrap}
  tbody td{padding:10px 12px;border-bottom:1px solid #f2f4f6;vertical-align:middle}
  tbody tr:hover{background:#fafcfe}
  .t-wrap{overflow-x:auto}
  .empty{padding:26px;text-align:center;color:var(--muted);font-size:13px}

  .badge{display:inline-block;padding:3px 9px;border-radius:3px;font-size:11.5px;font-weight:700;color:#fff;white-space:nowrap}
  .b-success{background:var(--success)} .b-danger{background:var(--danger)} .b-warn{background:var(--warning)}
  .b-info{background:var(--info)} .b-gray{background:#95a5a6} .b-purple{background:var(--purple)}
  .b-brand{background:var(--brand)}

  .dot{display:inline-block;width:11px;height:11px;border-radius:50%;vertical-align:-1px}
  .dot.ok{background:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.18)}
  .dot.bad{background:#ef4444;box-shadow:0 0 0 3px rgba(239,68,68,.18)}
  .dot.warn{background:#f59e0b;box-shadow:0 0 0 3px rgba(245,158,11,.18)}

  .prog{height:7px;background:#edf1f5;border-radius:4px;overflow:hidden;min-width:90px}
  .prog i{display:block;height:100%;background:var(--success)}

  /* ---------- menu dropdown ---------- */
  .menu{position:relative;display:inline-block}
  .menu-list{position:absolute;right:0;top:100%;background:#fff;border:1px solid #dfe3e8;border-radius:4px;box-shadow:0 6px 18px rgba(0,0,0,.12);min-width:170px;padding:5px;display:none;z-index:15}
  .menu.open .menu-list{display:block}
  .menu-list button{display:flex;width:100%;gap:9px;align-items:center;border:0;background:none;padding:8px 10px;font-size:13px;color:#444;cursor:pointer;border-radius:3px;text-align:left}
  .menu-list button:hover{background:#f4f7fa}
  .menu-list .danger{color:var(--danger)}

  /* ---------- chart ---------- */
  .chart{display:flex;align-items:flex-end;gap:14px;height:170px;padding:10px 4px 0}
  .chart .bar{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:6px;height:100%}
  .chart .stack{width:100%;max-width:46px;display:flex;flex-direction:column;justify-content:flex-end;height:100%}
  .chart .ok{background:var(--success);border-radius:2px 2px 0 0}
  .chart .ng{background:#f0a3a3;border-radius:2px 2px 0 0}
  .chart .lbl{font-size:11px;color:var(--muted)}
  .chart .val{font-size:11px;color:#666;font-weight:600}

  /* ---------- modal & toast ---------- */
  .overlay{position:fixed;inset:0;background:rgba(20,28,36,.45);display:none;z-index:60}
  .overlay.on{display:block}
  .modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;padding:20px;z-index:70}
  .modal.on{display:flex}
  .modal-box{background:#fff;border-radius:4px;width:100%;max-width:560px;max-height:90vh;overflow:auto;box-shadow:0 18px 50px rgba(0,0,0,.3)}
  .modal-box.lg{max-width:760px}
  .modal-head{display:flex;align-items:center;padding:14px 18px;border-bottom:1px solid #eef1f4}
  .modal-head h3{margin:0;font-size:15px}
  .modal-head .btn-icon{margin-left:auto;font-size:18px;line-height:1}
  .modal-body{padding:18px}
  .modal-foot{display:flex;gap:10px;justify-content:flex-end;padding:14px 18px;border-top:1px solid #eef1f4;background:#fafbfc}

  #toasts{position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;gap:10px;z-index:90}
  .toast{background:#2c3e50;color:#fff;padding:11px 15px;border-radius:4px;font-size:13px;box-shadow:0 8px 22px rgba(0,0,0,.22);max-width:360px;display:flex;gap:9px;align-items:flex-start;animation:slideIn .18s ease-out}
  .toast.ok{background:#1e7e4f} .toast.err{background:#b93b2c} .toast.warn{background:#96650c}
  @keyframes slideIn{from{transform:translateY(8px);opacity:0}to{transform:none;opacity:1}}

  .only-mobile{display:none}
  .muted{color:var(--muted)}
  .mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}
  .t-wrap .mono{white-space:nowrap}
  .right{text-align:right}
  .center{text-align:center}
  .mt10{margin-top:10px}.mb0{margin-bottom:0}
  .modal .stat-num{font-size:19px}
  .modal .stat-label{white-space:normal;overflow:visible;line-height:1.2}
  .caret{display:inline-block;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;margin-left:6px;vertical-align:middle;opacity:.65}
  .menu.open .caret{transform:rotate(180deg)}

  @media(max-width:1100px){.stats{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:860px){
    .sidebar{transform:translateX(-100%);transition:transform .2s}
    .sidebar.open{transform:none}
    .main{margin-left:0}
    .only-mobile{display:inline-flex}
    .stats{grid-template-columns:1fr}
    .grid2,.grid3{grid-template-columns:1fr}
    .topbar{padding:0 12px;gap:8px}
    .crumb{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .topbar-right{gap:6px;flex:none}
    .hide-mobile{display:none!important}
    .content{padding:12px}
  }