:root {
    --bg: #f5f1e8;
    --bg-card: #ffffff;
    --ink: #1a1612;
    --ink-soft: #5c5347;
    --ink-faint: #9c9387;
    --rule: #d8cfbe;
    --accent: #c8390e;
    --accent-soft: #f4ddd1;
    --accent-int: #2f5d4f;
    --accent-int-soft: #d6e3dd;
    --warn-bg: #fff4d6;
    --warn-ink: #6b4f00;
    --warn-rule: #e6c466;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    background: var(--bg);
    color: var(--ink);
    font-family: 'Inter Tight', sans-serif;
    line-height: 1.5;
    min-height: 100vh;
    background-image:
      radial-gradient(ellipse at 0% 0%, rgba(200, 57, 14, 0.04) 0%, transparent 40%),
      radial-gradient(ellipse at 100% 100%, rgba(47, 93, 79, 0.05) 0%, transparent 40%);
  }

  .wrap { max-width: 1280px; margin: 0 auto; padding: 56px 32px 80px; }

  /* HEADER */
  header {
    border-bottom: 1px solid var(--rule);
    padding-bottom: 28px;
    margin-bottom: 40px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
  }
  .title-block h1 {
    font-family: 'Fraunces', serif;
    font-weight: 600;
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    letter-spacing: -0.02em;
    line-height: 1;
    margin-bottom: 10px;
  }
  .title-block .subtitle {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--ink-soft);
  }
  .title-block .accent {
    color: var(--accent);
    font-style: italic;
  }
  .meta {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    color: var(--ink-faint);
    text-align: right;
    letter-spacing: 0.05em;
  }
  .meta strong { color: var(--ink); font-weight: 500; }

  /* UPLOAD */
  .upload-zone {
    display: block;
    border: 2px dashed var(--rule);
    border-radius: 4px;
    padding: 64px 32px;
    text-align: center;
    background: var(--bg-card);
    transition: all 0.2s ease;
    cursor: pointer;
    margin-bottom: 32px;
  }
  .upload-zone:hover, .upload-zone.drag {
    border-color: var(--accent);
    background: var(--accent-soft);
  }
  .upload-zone .icon {
    font-family: 'Fraunces', serif;
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 12px;
    font-weight: 400;
  }
  .upload-zone h2 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 1.4rem;
    margin-bottom: 6px;
  }
  .upload-zone p {
    color: var(--ink-soft);
    font-size: 0.95rem;
  }
  .upload-zone p.note {
    margin-top: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-faint);
  }
  #fileInput { display: none; }

  /* RESULTS */
  #results { display: none; }
  #results.visible { display: block; }

  .section-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--ink-faint);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .section-label::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    transform: rotate(45deg);
  }
  .section-label.int::before { background: var(--accent-int); }

  h2.section-h {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 1.8rem;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
  }

  /* KPI GRID */
  .kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1px;
    background: var(--rule);
    border: 1px solid var(--rule);
    margin-bottom: 48px;
  }
  .kpi {
    background: var(--bg-card);
    padding: 24px 22px;
    position: relative;
  }
  .kpi.hero {
    background: var(--ink);
    color: var(--bg);
  }
  .kpi.hero .kpi-label { color: rgba(245, 241, 232, 0.6); }
  .kpi.hero .kpi-unit { color: rgba(245, 241, 232, 0.55); }
  .kpi-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-faint);
    margin-bottom: 12px;
  }
  .kpi-value {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 2.4rem;
    line-height: 1;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
  }
  .kpi-value .small { font-size: 1.1rem; color: var(--ink-soft); margin-left: 4px; font-weight: 400; }
  .kpi.hero .kpi-value .small { color: rgba(245, 241, 232, 0.6); }
  .kpi-unit {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-faint);
    margin-top: 6px;
  }

  /* TWO-COL */
  .grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 48px;
  }
  @media (max-width: 800px) { .grid-2 { grid-template-columns: 1fr; } }

  .panel {
    background: var(--bg-card);
    border: 1px solid var(--rule);
    padding: 28px 28px 24px;
  }
  .panel.ext { border-top: 3px solid var(--accent); }
  .panel.int { border-top: 3px solid var(--accent-int); }
  .panel h3 {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    font-size: 1.5rem;
    margin-bottom: 6px;
  }
  .panel .pct {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--ink-soft);
    margin-bottom: 22px;
  }
  .panel-rows { font-family: 'JetBrains Mono', monospace; font-size: 0.92rem; }
  .panel-rows .r {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 8px 0;
    border-bottom: 1px dashed var(--rule);
  }
  .panel-rows .r:last-child { border-bottom: none; }
  .panel-rows .lbl { color: var(--ink-soft); }
  .panel-rows .val { font-weight: 500; font-variant-numeric: tabular-nums; }

  /* TABLES */
  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
    margin-bottom: 14px;
  }
  table thead th {
    text-align: left;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-faint);
    padding: 10px 12px;
    border-bottom: 1.5px solid var(--ink);
    font-weight: 500;
    background: transparent;
  }
  table thead th.num { text-align: right; }
  table tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--rule);
    font-variant-numeric: tabular-nums;
  }
  table tbody td.num { text-align: right; font-family: 'JetBrains Mono', monospace; }
  table tbody td.code { font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; }
  table tbody tr:hover { background: rgba(200, 57, 14, 0.03); }
  .bar-cell {
    position: relative;
    overflow: hidden;
  }
  .bar {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--accent-soft) 0%, transparent 100%);
    z-index: 0;
    pointer-events: none;
    transform-origin: left;
  }
  .bar.int { background: linear-gradient(90deg, var(--accent-int-soft) 0%, transparent 100%); }
  .bar-cell .content { position: relative; z-index: 1; }
  .ei-tag {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    padding: 2px 7px;
    background: var(--accent-soft);
    color: var(--accent);
    letter-spacing: 0.1em;
    font-weight: 500;
  }
  .ei-tag.int { background: var(--accent-int-soft); color: var(--accent-int); }

  /* TABS */
  .tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 24px;
  }
  .tab {
    background: none;
    border: none;
    padding: 12px 22px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-faint);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    font-weight: 500;
  }
  .tab:hover { color: var(--ink-soft); }
  .tab.active { color: var(--accent); border-bottom-color: var(--accent); }
  .tab-content { display: none; }
  .tab-content.active { display: block; }

  /* DIST CHART */
  .dist-chart {
    background: var(--bg-card);
    border: 1px solid var(--rule);
    padding: 28px;
    margin-bottom: 48px;
  }
  .year-row {
    display: grid;
    grid-template-columns: 80px 1fr 100px 80px;
    gap: 16px;
    align-items: center;
    padding: 6px 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
  }
  .year-row .yr { font-weight: 600; color: var(--ink); }
  .year-row .bar-track {
    height: 22px;
    background: rgba(200, 57, 14, 0.08);
    position: relative;
  }
  .year-row .bar-fill {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    background: var(--accent);
    transition: width 0.5s ease;
  }
  .year-row .pct-text { color: var(--ink-soft); text-align: right; }
  .year-row .deb-text { color: var(--ink-soft); text-align: right; }

  /* WARNING */
  .warn-banner {
    background: var(--warn-bg);
    border: 1px solid var(--warn-rule);
    border-left-width: 4px;
    padding: 14px 18px;
    margin-bottom: 32px;
    font-size: 0.9rem;
    color: var(--warn-ink);
    border-radius: 2px;
  }
  .warn-banner strong { font-weight: 600; }
  .warn-banner .label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    margin-bottom: 6px;
    display: block;
  }

  /* SECTION SPACER */
  .section { margin-bottom: 56px; }

  /* RESET BUTTON */
  .reset-btn {
    background: none;
    border: 1px solid var(--rule);
    padding: 8px 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-soft);
    cursor: pointer;
    transition: all 0.15s;
  }
  .reset-btn:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }

  /* GROUP HEADERS in tables */
  .group-head td {
    background: rgba(26, 22, 18, 0.04);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-soft);
    padding: 8px 12px;
    font-weight: 500;
  }

  .footnote {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--ink-faint);
    margin-top: 14px;
    line-height: 1.6;
    letter-spacing: 0.02em;
  }