:root{
      --bg:#0a0a0f;--surface:#111118;--surface2:#16161f;--surface3:#1d1d28;
      --border:rgba(255,255,255,.08);--border2:rgba(255,255,255,.14);
      --gold:#c9a84c;--gold-light:#e8c87a;--gold-dim:rgba(201,168,76,.12);
      --text:#f0ede8;--text2:rgba(240,237,232,.74);--text3:rgba(240,237,232,.50);
      --green:#3dba87;--green-dim:rgba(61,186,135,.12);--red:#e05c5c;--red-dim:rgba(224,92,92,.12);
      --blue:#5b8ff9;--amber:#e0a64c;--amber-dim:rgba(224,166,76,.14);
      --font:'DM Sans',system-ui,sans-serif;--display:'DM Serif Display',Georgia,serif;
      --radius:12px;--radius-sm:8px;--sidebar:236px;--topbar:60px;--topbar-bg:rgba(10,10,15,.85);
    }
    html[data-theme="light"]{
      --topbar-bg:rgba(255,255,255,.85);
      --bg:#eceef2;--surface:#ffffff;--surface2:#f3f4f7;--surface3:#e8eaef;
      --border:rgba(20,24,33,.10);--border2:rgba(20,24,33,.18);
      --gold:#b0892a;--gold-light:#8a6a17;--gold-dim:rgba(176,137,42,.14);
      --text:#15181e;--text2:rgba(21,24,30,.70);--text3:rgba(21,24,30,.50);
      --green:#1c8f5a;--green-dim:rgba(28,143,90,.13);--red:#bd3b3b;--red-dim:rgba(189,59,59,.11);
      --blue:#2f6ae0;--amber:#9a6b0d;--amber-dim:rgba(154,107,13,.15);
    }
    @media print{
      html,body{background:#fff !important;color:#000 !important}
      .sidebar,.topbar,.btn,.toast,#toast,.banner{display:none !important}
      .shell{display:block}
      .main{grid-column:1 !important}
      .content{padding:0 !important;max-width:100% !important}
      .card{border:1px solid #bbb !important;box-shadow:none !important;break-inside:avoid;background:#fff !important;margin-bottom:10px}
      .card-head{border-bottom:1px solid #ccc !important}
      .card-title,.card-sub,.kpi .label,.kpi .value,td,th,.muted,strong,h1{color:#000 !important}
      table{font-size:11.5px}
      th{border-bottom:1px solid #999 !important}
      td{border-bottom:1px solid #ddd !important}
      .pill{border:1px solid #999 !important;color:#000 !important;background:#fff !important}
      a{color:#000 !important;text-decoration:none}
      .grid.g4,.grid.g3{grid-template-columns:repeat(4,1fr)}
      /* report documents: each on its own page, no scroll clipping */
      .rdoc{page-break-after:always}
      .rdoc:last-child{page-break-after:auto}
      .card .card-head .card-sub{display:block}
      [style*="overflow:auto"]{overflow:visible !important;max-height:none !important}
      .no-print,.report-toolbar{display:none !important}
    }
    *{box-sizing:border-box;margin:0;padding:0}
    body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}
    a{color:inherit;text-decoration:none}
    button{font-family:inherit;cursor:pointer}
    ::-webkit-scrollbar{width:9px;height:9px}
    ::-webkit-scrollbar-thumb{background:var(--border2);border-radius:9px}
    .shell{display:grid;grid-template-columns:var(--sidebar) 1fr;min-height:100vh}
    .sidebar{background:var(--surface);border-right:1px solid var(--border);position:fixed;inset:0 auto 0 0;width:var(--sidebar);display:flex;flex-direction:column;z-index:20}
    .brand{display:flex;align-items:center;gap:10px;padding:18px 18px 16px;border-bottom:1px solid var(--border)}
    .brand img{width:30px;height:30px;border-radius:7px}
    .brand b{font-family:var(--display);font-size:17px;letter-spacing:.2px}
    .brand span{display:block;font-size:10.5px;color:var(--text3);letter-spacing:1.5px;text-transform:uppercase}
    .nav{flex:1;overflow-y:auto;padding:12px 10px}
    .nav-group{font-size:10px;letter-spacing:1.4px;text-transform:uppercase;color:var(--text3);padding:14px 12px 6px}
    .nav-item{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:var(--radius-sm);color:var(--text2);font-weight:500;font-size:13.5px;margin-bottom:1px}
    .nav-item i{font-size:18px;width:20px;text-align:center}
    .nav-item:hover{background:var(--surface3);color:var(--text)}
    .nav-item.active{background:var(--gold-dim);color:var(--gold-light)}
    .main{grid-column:2;display:flex;flex-direction:column;min-height:100vh}
    .topbar{height:var(--topbar);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 26px;position:sticky;top:0;background:var(--topbar-bg);backdrop-filter:blur(10px);z-index:10}
    .topbar h1{font-size:18px;font-weight:600}
    .topbar .sub{font-size:12px;color:var(--text3)}
    .who{display:flex;align-items:center;gap:10px;font-size:12.5px}
    .who .avatar{width:32px;height:32px;border-radius:50%;background:var(--gold-dim);color:var(--gold-light);display:flex;align-items:center;justify-content:center;font-weight:600}
    .content{padding:24px 26px 60px;max-width:1280px;width:100%}
    .grid{display:grid;gap:16px}
    .g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
    @media(max-width:1100px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:1fr}.g2{grid-template-columns:1fr}}
    .hamburger{display:none !important}
    .sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:19}
    .period-chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:5px 10px;border-radius:20px;background:var(--surface3);color:var(--text2)}
    @media(max-width:880px){
      .shell{grid-template-columns:1fr}
      .sidebar{transform:translateX(-100%);transition:transform .25s ease;box-shadow:6px 0 40px rgba(0,0,0,.55)}
      .sidebar.open{transform:translateX(0)}
      .sidebar-overlay.show{display:block}
      .main{grid-column:1}
      .hamburger{display:inline-flex !important}
      .topbar{padding:0 14px}.content{padding:18px 14px 50px}
      .grid.g4{grid-template-columns:repeat(2,1fr)}
      .period-chip span.lbl{display:none}
    }
    @media(max-width:520px){.grid.g4{grid-template-columns:1fr}.who .avatar{display:none}}
    .card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
    .card-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--border)}
    .card-title{font-size:14px;font-weight:600}
    .card-sub{font-size:12px;color:var(--text3);margin-top:2px}
    .card-body{padding:18px}
    .kpi{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px}
    .kpi .label{font-size:11.5px;color:var(--text3);text-transform:uppercase;letter-spacing:.6px}
    .kpi .value{font-size:24px;font-weight:700;margin-top:6px;font-variant-numeric:tabular-nums}
    .kpi .delta{font-size:12px;color:var(--text2);margin-top:3px}
    table{width:100%;border-collapse:collapse;font-size:13px}
    th{text-align:left;font-size:11px;letter-spacing:.5px;text-transform:uppercase;color:var(--text3);font-weight:600;padding:10px 14px;border-bottom:1px solid var(--border)}
    td{padding:11px 14px;border-bottom:1px solid var(--border);font-variant-numeric:tabular-nums}
    tr:last-child td{border-bottom:none}
    tbody tr:nth-child(even):not(:hover) td{background:var(--surface2)}
    tbody tr:hover td{background:var(--surface3)}
    .num,.right{text-align:right;font-variant-numeric:tabular-nums}
    .pill{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:20px;font-size:11.5px;font-weight:600}
    .pill.green{background:var(--green-dim);color:var(--green)}
    .pill.red{background:var(--red-dim);color:var(--red)}
    .pill.amber{background:var(--amber-dim);color:var(--amber)}
    .pill.gray{background:var(--surface3);color:var(--text2)}
    .btn{display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:var(--radius-sm);border:1px solid var(--border2);background:var(--surface3);color:var(--text);font-weight:600;font-size:13px}
    .btn:hover{border-color:var(--gold)}
    .btn i{font-size:16px}
    .btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-light));color:#1a1407;border:none}
    .btn-gold:hover{filter:brightness(1.06)}
    .btn-ghost{background:transparent}
    .btn-sm{padding:6px 11px;font-size:12px}
    .btn-danger{color:var(--red);border-color:var(--red-dim)}
    .field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
    .label{font-size:12px;color:var(--text2);font-weight:500}
    .input,select.input{background:var(--surface3);border:1px solid var(--border2);border-radius:var(--radius-sm);padding:9px 12px;color:var(--text);font-family:inherit;font-size:13.5px;width:100%}
    .input:focus{outline:none;border-color:var(--gold)}
    a:focus-visible,button:focus-visible,.nav-item:focus-visible,.input:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
    .row{display:flex;gap:12px;flex-wrap:wrap}
    .row>*{flex:1;min-width:140px}
    .banner{padding:12px 16px;border-radius:var(--radius-sm);font-size:13px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
    .banner.err{background:var(--red-dim);color:#f3b0b0;border:1px solid rgba(224,92,92,.3)}
    .banner.warn{background:var(--amber-dim);color:var(--gold-light);border:1px solid rgba(224,166,76,.3)}
    .banner.ok{background:var(--green-dim);color:#9fe3c4;border:1px solid rgba(61,186,135,.3)}
    .empty{text-align:center;padding:42px 20px;color:var(--text3)}
    .empty i{font-size:34px;display:block;margin-bottom:10px;opacity:.5}
    .toast{position:fixed;bottom:24px;right:24px;background:var(--surface3);border:1px solid var(--border2);border-radius:var(--radius-sm);padding:13px 18px;font-size:13px;z-index:100;box-shadow:0 12px 40px rgba(0,0,0,.5);max-width:360px;display:flex;gap:10px;align-items:center;margin-top:8px}
    .toast.ok{border-color:rgba(61,186,135,.4)}.toast.err{border-color:rgba(224,92,92,.4)}
    .spin{width:34px;height:34px;border:3px solid var(--border2);border-top-color:var(--gold);border-radius:50%;animation:s 1s linear infinite;margin:50px auto}
    @keyframes s{to{transform:rotate(360deg)}}
    .gate{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:200;padding:24px}
    .gate-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:32px;max-width:420px;width:100%;text-align:center}
    .gate-card img{width:46px;height:46px;border-radius:10px;margin-bottom:14px}
    .gate-card h2{font-family:var(--display);font-size:22px;margin-bottom:6px}
    .gate-card p{color:var(--text2);font-size:13px;margin-bottom:18px}
    .lines-table td{padding:6px 8px}
    .lines-table .input{padding:7px 9px;font-size:13px}
    .muted{color:var(--text3)}
    .totrow td{font-weight:700;border-top:2px solid var(--border2)}
    /* DM Serif Display mis-shapes several Vietnamese tone-mark combinations
       (e.g. "vốn", "cấu" render with the accent floating off the letter), so
       sections/titles carrying real Vietnamese text use --font, not --display. */
    .sec-title{font-family:var(--font);font-weight:600;font-size:13px;color:var(--gold-light);padding:8px 0 4px;letter-spacing:.3px}
    /* VAS / TT200 report document */
    .rdoc{padding:6px 6px 4px}
    .rdoc-head{display:flex;justify-content:space-between;gap:24px;font-size:12.5px;align-items:flex-start;flex-wrap:wrap}
    .rdoc-org div,.rdoc-form div{margin-bottom:3px}
    .rdoc-form{text-align:center;min-width:230px}
    .rdoc-form .fno{font-weight:700;font-size:13px}
    .rdoc-title{text-align:center;margin:16px 0 6px}
    /* var(--font), not --display: DM Serif Display mis-shapes Vietnamese tone
       marks (see .sec-title above) and these are official VAS/TT200 titles. */
    .rdoc-title h2{font-family:var(--font);font-size:19px;font-weight:700;letter-spacing:.4px}
    .rdoc-period{font-size:12.5px;color:var(--text2);margin-top:4px}
    .rdoc-unit{font-size:11.5px;font-style:italic;color:var(--text3);text-align:right;margin:6px 0 4px}
    .rdoc-sign{margin-top:26px}
    .rdoc-date{text-align:right;font-style:italic;font-size:12px;margin-bottom:12px;padding-right:6%}
    .rdoc-sign-row{display:flex;justify-content:space-around;text-align:center;gap:12px}
    .rdoc-sign-col{flex:1}
    .rdoc-sign-col .role{font-weight:600;font-size:12.5px}
    .rdoc-sign-col .ky{font-size:11px;font-style:italic;color:var(--text3);margin-top:2px}
    .rdoc-sign-col .space{height:54px}