@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
  * { margin: 0; padding: 0; box-sizing: border-box; }
  :root {
    --brand: #C41E3A; --brand-light: #FEF2F4;
    --blue: #2563EB; --teal: #0D9488; --orange: #EA580C;
    --green: #059669; --green-bg: #ECFDF5; --red: #DC2626; --red-bg: #FEF2F2;
    --text: #111827; --text-sec: #6B7280; --text-muted: #9CA3AF;
    --bg: #F8F9FB; --surface: #FFFFFF; --border: #E5E7EB;
    --matrix-green: #DCFCE7; --matrix-yellow: #FEF9C3; --matrix-orange: #FFEDD5;
    --matrix-red: #FEE2E2; --matrix-gray: #F3F4F6;
    --highlight: rgba(37,99,235,0.13);
  }
  body { font-family: 'Inter', system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

  /* === HEADER === */
  .header { position: fixed; top: 0; left: 0; right: 0; z-index: 999; background: var(--surface); border-bottom: 2px solid #D1D5DB; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
  .header-row { display: flex; align-items: center; gap: 12px; padding: 7px 24px; }
  .header-brand { display: flex; align-items: baseline; gap: 8px; margin-right: 4px; }
  .header-brand-logo { font-family: 'Arial Black', Arial, sans-serif; font-weight: 900; font-size: 26px; color: var(--brand); letter-spacing: 1px; }
  .header-brand-title { font-size: 13px; font-weight: 600; color: var(--text); letter-spacing: -0.2px; white-space: nowrap; }
  .header-filters { display: flex; align-items: center; gap: 8px; flex: 1; justify-content: center; }
  .hf-select { padding: 5px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 11px; font-family: inherit; color: var(--text); background: var(--surface); transition: opacity 0.2s, background 0.2s; }
  .hf-select.inactive { opacity: 0.4; pointer-events: none; background: #F3F4F6; }
  .hf-sep { width: 1px; height: 20px; background: #B0B8C4; margin: 0 2px; }
  .hf-slider { display: flex; align-items: center; gap: 4px; }
  .hf-slider-label { font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; white-space: nowrap; }
  .hf-slider input[type="range"] { width: 72px; accent-color: var(--brand); }
  .hf-slider-val { font-size: 11px; font-weight: 700; color: var(--brand); min-width: 24px; text-align: center; }
  .hf-slider-unit { font-size: 10px; color: var(--text-muted); white-space: nowrap; }
  .header-model { display: flex; align-items: center; min-width: 170px; justify-content: flex-end; }
  .model-select-wrap { position: relative; }
  .model-select-wrap select { padding: 5px 24px 5px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 11px; font-family: inherit; color: var(--text); background: var(--surface); min-width: 168px; appearance: none; cursor: pointer; }
  .model-select-wrap::after { content: '\25BE'; position: absolute; right: 8px; top: 50%; transform: translateY(-50%); font-size: 10px; color: var(--text-muted); pointer-events: none; }
  .model-select-wrap select.compare-active { background: var(--brand-light); color: var(--brand); border-color: var(--brand); font-weight: 600; }

  /* === MAIN === */
  .main { margin-top: 52px; padding: 18px 24px 48px; max-width: 1100px; margin-left: auto; margin-right: auto; }
  .card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
  .kpi-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
  .kpi-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.6px; margin-bottom: 6px; }
  .kpi-value { font-size: 26px; font-weight: 700; line-height: 1; margin-bottom: 6px; }
  .kpi-delta { display: inline-block; font-size: 11px; font-weight: 500; padding: 2px 8px; border-radius: 12px; }
  .kpi-delta.good { color: var(--green); background: var(--green-bg); }
  .kpi-delta.bad { color: var(--red); background: var(--red-bg); }

  /* === STATUS + DOWNLOAD === */
  .status-download-row { display: grid; grid-template-columns: 1fr auto; gap: 12px; margin-bottom: 12px; align-items: stretch; }
  .status-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 11px 18px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); display: flex; align-items: center; gap: 14px; flex-wrap: wrap; font-size: 13px; }
  .download-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 11px 18px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); display: flex; align-items: center; gap: 10px; }
  .status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); display: inline-block; margin-right: 5px; }
  .status-sep { width: 1px; height: 16px; background: var(--border); }
  .download-btn { display: inline-flex; align-items: center; gap: 6px; background: var(--bg); color: var(--text-sec); border: 1px solid var(--border); border-radius: 8px; padding: 7px 12px; font-size: 12px; font-weight: 600; cursor: pointer; transition: all 0.15s; }
  .download-btn:hover { background: #EBEDF0; color: var(--text); }
  .download-btn-small { font-size: 11px; padding: 5px 10px; }
  .download-btn .icon { width: 16px; height: 16px; flex-shrink: 0; }
  .download-btn.download-btn-small .icon { width: 12px; height: 12px; }
  .link-btn { font-size: 11px; font-weight: 500; color: var(--text-sec); cursor: pointer; padding: 0; border: none; background: none; text-decoration: none; transition: color 0.15s; display: inline-flex; align-items: center; gap: 5px; }
  .link-btn:hover { color: var(--blue); }
  .link-btn .icon { width: 16px; height: 16px; flex-shrink: 0; }

  /* === SECTIONS === */
  .section-header { font-size: 14px; font-weight: 700; margin-bottom: 2px; }
  .section-sub { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }

  /* === SCOPE SUMMARY BAR === */
  .scope-bar { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 10px 18px 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); margin-bottom: 12px; }
  .scope-top { display: flex; align-items: center; gap: 24px; }
  .scope-group { flex: 1; }
  .scope-divider { width: 1px; height: 36px; background: var(--border); }
  .scope-lbl { font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.6px; margin-bottom: 3px; }
  .scope-nums { display: flex; align-items: baseline; gap: 5px; font-size: 12px; color: var(--text-muted); }
  .scope-nums b { font-size: 13px; font-weight: 600; color: var(--text); }
  .scope-progress-row { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
  .scope-track { width: 80px; height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
  .scope-fill { height: 100%; background: var(--brand); border-radius: 3px; transition: width 0.3s; }
  .scope-pct { font-size: 12px; font-weight: 600; color: var(--text); min-width: 28px; }
  .scope-footer { font-size: 11px; color: var(--text-muted); margin-top: 7px; padding-top: 6px; border-top: 1px solid var(--border); }
  .scope-footer b { color: var(--text-sec); font-weight: 600; }

  /* === INFO BANNER === */
  .info-banner { background: #EFF6FF; border: 1px solid #BFDBFE; border-radius: 8px; padding: 10px 16px; font-size: 12px; color: #1E40AF; margin-bottom: 12px; display: none; align-items: center; gap: 8px; }
  .info-banner .info-icon { font-size: 16px; flex-shrink: 0; }

  /* === PERF HEADER WITH TOGGLE === */
  .perf-header-row { display: flex; align-items: center; gap: 10px; margin-bottom: 2px; }
  .perf-toggle { display: flex; gap: 0; }
  .perf-toggle label { padding: 4px 10px; font-size: 11px; font-weight: 500; cursor: pointer; border: 1px solid var(--border); color: var(--text-sec); background: var(--surface); transition: all 0.15s; }
  .perf-toggle label:first-child { border-radius: 6px 0 0 6px; }
  .perf-toggle label:last-child { border-radius: 0 6px 6px 0; border-left: none; }
  .perf-toggle label.active { background: var(--brand-light); color: var(--brand); font-weight: 600; border-color: var(--brand); }
  .perf-toggle label.active + label { border-left-color: var(--brand); }
  .perf-toggle label.disabled { opacity: 0.35; pointer-events: none; }
  .perf-core-count { font-size: 11px; color: var(--text-muted); }
  .perf-note { font-size: 11px; color: var(--orange); margin-bottom: 8px; display: none; }

  /* === CHARTS === */
  .chart-container { position: relative; height: 280px; margin: 12px 0; }
  .chart-container.tall { height: 364px; }
  .chart-container.small { height: 100px; }
  .chart-container.bar-h { height: 180px; }
  .chart-container.sens-h { height: 200px; }

  /* === INLINE FILTERS === */
  .if-label { font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; white-space: nowrap; }
  .if-select { padding: 4px 7px; border: 1px solid var(--border); border-radius: 6px; font-size: 11px; font-family: inherit; background: var(--surface); color: var(--text); }

  /* === RADIO TOGGLE === */
  .radio-group { display: flex; gap: 0; }
  .radio-group label { padding: 5px 12px; font-size: 11px; font-weight: 500; cursor: pointer; border: 1px solid var(--border); color: var(--text-sec); background: var(--surface); }
  .radio-group label:first-child { border-radius: 6px 0 0 6px; }
  .radio-group label:last-child { border-radius: 0 6px 6px 0; }
  .radio-group label:not(:first-child) { border-left: none; }
  .radio-group label.active { background: var(--brand-light); color: var(--brand); font-weight: 600; border-color: var(--brand); }

  /* === MATRIX === */
  .matrix-wrap { overflow-x: auto; overflow-y: auto; max-height: 75vh; border: 1px solid var(--border); border-radius: 10px; margin: 12px 0; }
  .matrix-table { border-collapse: collapse; font-size: 11px; width: 100%; font-variant-numeric: tabular-nums; }
  .matrix-table th { background: var(--bg); color: var(--text-sec); font-weight: 600; padding: 5px 6px; text-align: center; border: 1px solid var(--border); position: sticky; top: 0; z-index: 2; white-space: nowrap; }
  .matrix-table th.corner { position: sticky; left: 0; z-index: 3; }
  .matrix-table td { padding: 3px 5px; text-align: center; border: 1px solid var(--border); min-width: 44px; font-size: 10px; }
  .matrix-table td.sph-header { background: var(--bg); color: var(--text-sec); font-weight: 600; text-align: right; position: sticky; left: 0; z-index: 1; white-space: nowrap; padding-right: 6px; }
  .cell-green { background: var(--matrix-green); color: #166534; }
  .cell-yellow { background: var(--matrix-yellow); color: #854D0E; }
  .cell-orange { background: var(--matrix-orange); color: #9A3412; }
  .cell-red { background: var(--matrix-red); color: #991B1B; }
  .cell-empty { background: var(--matrix-gray); color: var(--text-muted); }
  /* cell-noncore removed: threshold now filters data, not visual opacity */
  .cell-highlight { box-shadow: inset 0 0 0 1.5px var(--blue); }
  .th-highlight { background: #DBEAFE !important; color: var(--blue) !important; }
  .sph-highlight { background: #DBEAFE !important; color: var(--blue) !important; }

  /* === COMPARISON === */
  .comp-table { border-collapse: separate; border-spacing: 0; font-size: 12px; width: 100%; font-variant-numeric: tabular-nums; }
  .comp-table th { background: var(--bg); color: var(--text-sec); font-weight: 600; padding: 8px 10px; text-align: center; border: 1px solid var(--border); }
  .comp-table th.group-header { background: var(--surface); font-size: 13px; font-weight: 700; color: var(--text); border-bottom: 2px solid var(--border); }
  .comp-table td { padding: 8px 10px; text-align: center; border: 1px solid var(--border); }
  .comp-table td.model-name { text-align: left; font-weight: 600; }
  .comp-table .best { background: var(--green-bg); font-weight: 600; }
  .comp-table .worst { background: var(--red-bg); }
  .comp-table .seg-sep { border-left: 3px solid #9CA3AF !important; }
  .badge-star { display: inline-block; background: #FEF3C7; color: #B45309; font-size: 10px; font-weight: 700; padding: 2px 8px; border-radius: 10px; margin-left: 6px; }
  .bar-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
  .bar-grid .card { padding: 12px; }
  .sens-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 12px; }
  .sens-grid .card { padding: 12px; }

  .data-table { width: 100%; font-size: 12px; border-collapse: collapse; }
  .data-table th { padding: 8px; text-align: right; border-bottom: 1px solid var(--border); background: var(--bg); font-weight: 600; color: var(--text-sec); }
  .data-table th:first-child { text-align: left; }
  .data-table td { padding: 6px 8px; text-align: right; border-bottom: 1px solid #F0F1F3; }
  .data-table td:first-child { text-align: left; }
  .data-table tr:nth-child(even) { background: #FAFBFC; }
  .matrix-controls { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; flex-wrap: wrap; gap: 10px; }
  .matrix-controls-left { display: flex; align-items: center; gap: 10px; }
  .matrix-controls-right { display: flex; align-items: center; gap: 6px; }
  .expander-toggle { font-size: 12px; font-weight: 500; color: var(--text-sec); cursor: pointer; padding: 6px 0; border: none; background: none; }
  .expander-toggle:hover { color: var(--text); }
  .expander-content { display: none; }
  .expander-content.open { display: block; }

  /* Loading state — dims content and shows cursor feedback */
  body.loading { cursor: wait; }
  body.loading > :not(header) { opacity: 0.5; pointer-events: none; transition: opacity 0.15s; }

  /* Disabled filter dropdowns (e.g., SPH/CYL in compare mode) */
  select:disabled { opacity: 0.4; cursor: not-allowed; background: var(--bg); }