:root {
    --primary: #1a3a5c;
    --primary-light: #2a5a8c;
    --accent: #3498db;
    --accent-light: #ebf5fb;
    --success: #27ae60;
    --success-bg: #eafaf1;
    --warning: #e67e22;
    --danger: #e74c3c;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-500: #868e96;
    --gray-700: #495057;
    --gray-900: #212529;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.12);
}
* { margin:0; padding:0; box-sizing:border-box; }
  body { font-family:'Segoe UI',-apple-system,BlinkMacSystemFont,sans-serif; background:var(--gray-100); color:var(--gray-900); }

  /* ── NAV ── */
  .topbar {
    background:linear-gradient(135deg,var(--primary),var(--primary-light));
    padding:12px 32px;
    display:flex;
    align-items:center;
    justify-content:space-between;
  }
  .topbar h1 { color:#fff; font-size:16px; font-weight:600; letter-spacing:-0.3px; }
  .topbar .nav-links { display:flex; gap:20px; }
  .topbar .nav-links a { color:rgba(255,255,255,0.7); text-decoration:none; font-size:13px; }
  .topbar .nav-links a.active { color:#fff; font-weight:600; }
  .topbar .tab-label { background:rgba(255,255,255,0.15); color:#fff; font-size:11px; padding:4px 12px; border-radius:12px; }

  /* ── MAIN LAYOUT ── */
  .main { display:grid; grid-template-columns:380px 1fr; gap:0; min-height:calc(100vh - 48px); }

  /* ── LEFT PANEL ── */
  .panel-left { background:#fff; padding:28px 24px; border-right:1px solid var(--gray-200); overflow-y:auto; }
  .panel-title { font-size:16px; font-weight:700; color:var(--primary); margin-bottom:20px; text-transform:uppercase; letter-spacing:0.5px; }
  .field { margin-bottom:16px; }
  .field label { display:block; font-size:13px; color:var(--gray-700); margin-bottom:5px; font-weight:500; }
  .field input, .field select {
    width:100%; padding:10px 14px; border:1px solid var(--gray-300); border-radius:6px;
    font-size:14px; color:var(--gray-900); background:var(--gray-50); transition:border 0.2s;
  }
  .field input:focus, .field select:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(52,152,219,0.1); }
  .field-group-title { font-size:11px; text-transform:uppercase; letter-spacing:1px; color:var(--accent); font-weight:700; margin:22px 0 10px; }
  .help-text { font-size:11px; color:var(--gray-500); margin-top:4px; line-height:1.5; }
  .help-text strong { color:var(--accent); }
  .advanced-toggle { color:var(--accent); font-size:12px; cursor:pointer; margin:12px 0; display:inline-flex; align-items:center; gap:4px; font-weight:500; }
  .advanced-toggle:hover { text-decoration:underline; }
  .advanced-section { display:none; }
  .advanced-section.open { display:block; }

  /* ── RIGHT PANEL ── */
  .panel-right { padding:28px 32px; overflow-y:auto; }
  .results-title { font-size:16px; font-weight:700; color:var(--primary); margin-bottom:16px; text-transform:uppercase; letter-spacing:0.5px; display:flex; justify-content:space-between; align-items:center; }
  .btn-export {
    display:inline-flex; align-items:center; gap:6px; background:var(--primary); color:#fff;
    border:none; padding:10px 20px; border-radius:6px; font-size:13px; font-weight:600; cursor:pointer;
    transition:background 0.2s;
  }
  .btn-export:hover { background:var(--primary-light); }
  .btn-export svg { width:16px; height:16px; }

  /* Hero cards */
  .hero-row { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:20px; }
  .hero-card { padding:20px; border-radius:var(--radius); color:#fff; text-align:center; }
  .hero-card.green { background:linear-gradient(135deg,#1e8449,var(--success)); }
  .hero-card.blue { background:linear-gradient(135deg,var(--primary),var(--primary-light)); }
  .hero-card .hero-label { font-size:9px; text-transform:uppercase; letter-spacing:1.2px; opacity:0.85; margin-bottom:6px; }
  .hero-card .hero-value { font-size:26px; font-weight:700; }
  .hero-card .hero-sub { font-size:10px; opacity:0.7; margin-top:4px; }

  /* Result sections */
  .result-container {
    float: left;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0;
}
  .result-section-title {
    font-size:1.75rem;
    text-transform:uppercase;
    letter-spacing:1px;
    color:var(--accent);
    font-weight:700;
    margin:18px 0 8px;
    }
  .result-row {
    display:flex;
    justify-content:space-between;
    padding:5px 0;
    font-size:1.5rem;
}
  .result-container .result-row.highlight {
    line-height: 1.5rem;
}
  .result-row .r-label {
    /* color:var(--gray-700);  */
    color: white;
  }
  .result-row .r-value {
    font-weight:700;
    /* color:var(--gray-900);  */
    color: white;
    font-size: 1.75rem;
  }
  .result-row.highlight .r-label { color:var(--success); font-weight:600; }
  .result-row.highlight .r-value { color:var(--success); }

  /* Bar chart */
  .bar-section { background:var(--gray-50); border-radius:var(--radius); padding:16px 20px; margin-top:20px; }
  .bar-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:12px; }
  .bar-header .bar-title { font-size:11px; text-transform:uppercase; letter-spacing:0.5px; color:var(--gray-700); font-weight:600; }
  .bar-header .bar-pct { font-size:16px; font-weight:700; color:var(--success); }
  .bar-track { width:100%; height:28px; background:var(--gray-200); border-radius:4px; overflow:hidden; display:flex; }
  .bar-paid { background:linear-gradient(90deg,var(--primary),var(--accent)); height:100%; transition:width 0.5s ease; }
  .bar-saved { background:repeating-linear-gradient(45deg,var(--danger),var(--danger) 3px,rgba(231,76,60,0.3) 3px,rgba(231,76,60,0.3) 6px); height:100%; transition:width 0.5s ease; }
  .bar-legend { display:flex; gap:20px; margin-top:10px; font-size:11px; color:var(--gray-700); }
  .bar-legend span { display:flex; align-items:center; gap:6px; }
  .legend-dot { width:10px; height:10px; border-radius:2px; flex-shrink:0; }
  .legend-dot.blue { background:var(--primary); }
  .legend-dot.red { background:var(--danger); }

  /* Note */
  .note { background:var(--accent-light); border:1px solid rgba(52,152,219,0.2); border-radius:var(--radius); padding:12px 16px; margin-top:18px; font-size:11px; color:var(--gray-700); line-height:1.6; }
  .note strong { color:var(--primary); }

  /* ═══════════════════════════════════════ */
  /* REPORT OVERLAY                         */
  /* ═══════════════════════════════════════ */
  .report-overlay {
    display:none; position:fixed; inset:0; background:rgba(0,0,0,0.5); z-index:1000;
    justify-content:center; align-items:flex-start; padding:20px; overflow-y:auto;
  }
  .report-overlay.open { display:flex; }
  .report-container {
    background:#fff; width:100%; max-width:900px; border-radius:var(--radius);
    box-shadow:var(--shadow-lg); position:relative; margin:20px auto;
  }
  .report-toolbar {
    position:sticky; top:0; background:#fff; padding:12px 20px; border-bottom:1px solid var(--gray-200);
    display:flex; justify-content:space-between; align-items:center; z-index:10; border-radius:var(--radius) var(--radius) 0 0;
  }
  .report-toolbar .toolbar-title { font-size:14px; font-weight:600; color:var(--primary); }
  .report-toolbar .toolbar-actions { display:flex; gap:8px; }
  .toolbar-btn {
    padding:8px 16px; border-radius:5px; font-size:12px; font-weight:600; cursor:pointer; border:1px solid var(--gray-300);
    background:#fff; color:var(--gray-700); transition:all 0.2s;
  }
  .toolbar-btn:hover { background:var(--gray-50); }
  .toolbar-btn.primary { background:var(--primary); color:#fff; border-color:var(--primary); }
  .toolbar-btn.primary:hover { background:var(--primary-light); }
  .report-body { padding:0; }

  /* Report inner styles */
  .rpt-header { background:linear-gradient(135deg,var(--primary),var(--primary-light)); color:#fff; padding:36px 32px 28px; }
  .rpt-header h1 { font-size:24px; font-weight:700; margin-bottom:6px; }
  .rpt-header p { font-size:13px; opacity:0.8; }
  .rpt-badges { display:flex; gap:8px; margin-top:14px; flex-wrap:wrap; }
  .rpt-badge { background:rgba(255,255,255,0.15); border:1px solid rgba(255,255,255,0.25); border-radius:16px; padding:4px 12px; font-size:11px; }
  .rpt-content { padding:28px 32px; }
  .rpt-kpi-row { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-bottom:24px; }
  .rpt-kpi { background:var(--gray-50); border:1px solid var(--gray-200); border-radius:6px; padding:16px; text-align:center; }
  .rpt-kpi .kpi-label { font-size:9px; text-transform:uppercase; letter-spacing:1px; color:var(--gray-500); margin-bottom:4px; }
  .rpt-kpi .kpi-value { font-size:24px; font-weight:700; }
  .rpt-kpi .kpi-value.green { color:var(--success); }
  .rpt-kpi .kpi-value.blue { color:var(--primary); }
  .rpt-section-title { font-size:14px; font-weight:700; color:var(--primary); margin:24px 0 12px; padding-bottom:8px; border-bottom:2px solid var(--gray-200); }
  .rpt-2col { display:grid; grid-template-columns:1fr 1fr; gap:24px; }
  .rpt-param-row { display:flex; justify-content:space-between; padding:6px 0; font-size:13px; border-bottom:1px solid var(--gray-100); }
  .rpt-param-row:last-child { border-bottom:none; }
  .rpt-param-row .p-label { color:var(--gray-700); }
  .rpt-param-row .p-value { font-weight:600; }
  .rpt-result-header { font-size:10px; text-transform:uppercase; letter-spacing:1px; color:var(--accent); font-weight:700; margin:14px 0 6px; }
  .rpt-result-row { display:flex; justify-content:space-between; padding:4px 0; font-size:12px; }
  .rpt-result-row .rr-label { color:var(--gray-700); }
  .rpt-result-row .rr-value { font-weight:600; }

  /* Report tables */
  .rpt-table { width:100%; border-collapse:collapse; font-size:12px; margin:12px 0; }
  .rpt-table th { background:var(--primary); color:#fff; padding:8px 12px; text-align:left; font-size:11px; text-transform:uppercase; letter-spacing:0.5px; }
  .rpt-table th:first-child { border-radius:6px 0 0 0; }
  .rpt-table th:last-child { border-radius:0 6px 0 0; }
  .rpt-table td { padding:8px 12px; border-bottom:1px solid var(--gray-200); color:var(--gray-700); }
  .rpt-table tr:nth-child(even) td { background:var(--gray-50); }
  .rpt-table .bold { font-weight:700; color:var(--gray-900); }
  .rpt-table .green { color:var(--success); font-weight:700; }

  /* Report info boxes */
  .rpt-info-box { background:var(--accent-light); border:1px solid rgba(52,152,219,0.25); border-radius:6px; padding:16px 20px; margin:16px 0; font-size:12px; line-height:1.7; color:var(--gray-700); }
  .rpt-info-box h4 { font-size:13px; color:var(--primary); margin-bottom:8px; }
  .rpt-info-box ul { margin:6px 0 6px 16px; }
  .rpt-info-box li { margin-bottom:3px; }
  .rpt-reco-box { background:var(--accent-light); border:1px solid rgba(52,152,219,0.2); border-radius:6px; padding:12px 16px; margin:12px 0; font-size:12px; }
  .rpt-reco-box strong { color:var(--primary); }
  .rpt-note { font-size:11px; color:var(--gray-500); font-style:italic; margin:8px 0; }

  /* Report bar */
  .rpt-bar-section { background:var(--gray-50); border-radius:6px; padding:16px 20px; margin:16px 0; }
  .rpt-bar-header { display:flex; justify-content:space-between; margin-bottom:10px; }
  .rpt-bar-title { font-size:11px; text-transform:uppercase; letter-spacing:0.5px; color:var(--gray-700); font-weight:600; }
  .rpt-bar-pct { font-size:16px; font-weight:700; color:var(--success); }

  /* Report conclusion */
  .rpt-conclusion { background:linear-gradient(135deg,var(--primary),var(--primary-light)); color:#fff; border-radius:6px; padding:24px 28px; margin-top:24px; }
  .rpt-conclusion h3 { font-size:16px; margin-bottom:8px; }
  .rpt-conclusion p { font-size:13px; opacity:0.9; line-height:1.6; }

  /* Report footer */
  .rpt-footer { padding:16px 32px; font-size:10px; color:var(--gray-500); border-top:1px solid var(--gray-200); text-align:center; }

  /* Detail toggle in report */
  .rpt-details summary { cursor:pointer; font-weight:600; font-size:13px; color:var(--accent); padding:6px 0; }
  .rpt-details summary:hover { opacity:0.8; }
  .rpt-details[open] summary { margin-bottom:8px; }

  /* Print styles */
  @media print {
    .report-toolbar { display:none !important; }
    .report-overlay { position:static; background:none; padding:0; display:block !important; }
    .report-container { box-shadow:none; max-width:100%; }
    body > *:not(.report-overlay) { display:none !important; }
  }

  @media (max-width:900px) {
    .main { grid-template-columns:1fr; }
    .rpt-kpi-row { grid-template-columns:1fr 1fr; }
    .rpt-2col { grid-template-columns:1fr; }
  }