:root {
    --primary: #1A365D;
    --secondary: #A8620A;
    --accent: #C2790A;
    --paper: #EEF3F9;
    --paper-raised: rgba(255,255,255,0.6);
    --ink: #1A202C;
    --ink-soft: #4A5568;
    --ink-faint: #8792A2;
    --line: rgba(26,54,93,0.14);
    --line-strong: rgba(26,54,93,0.22);
    --st-good: #15803D;     --st-good-tint: #DCFCE7;
    --st-info: #2B6CB0;     --st-info-tint: #DBEAFE;
    --st-warn: #B45309;     --st-warn-tint: #FEF3C7;
    --st-critical: #B91C1C; --st-critical-tint: #FEE2E2;
    --st-neutral: #6B7280;  --st-neutral-tint: #F1F5F9;
    --font-display: "Sora", Georgia, serif;
    --font-body: "Inter", -apple-system, "Segoe UI", sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  }

  * { box-sizing: border-box; }
  body {
    background:
      radial-gradient(circle at 15% 20%, rgba(194,121,10,0.16), transparent 45%),
      radial-gradient(circle at 85% 12%, rgba(43,108,176,0.12), transparent 45%),
      radial-gradient(circle at 72% 85%, rgba(194,121,10,0.10), transparent 50%),
      linear-gradient(165deg, #F4F7FB 0%, #EAF0F8 55%, #F4F7FB 100%);
    background-attachment: fixed;
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    margin: 0;
  }
  a { color: var(--secondary); }
  h1, h2, h3 { font-family: var(--font-display); text-wrap: balance; margin: 0 0 0.4em; color: var(--primary); }
  p { margin: 0 0 1em; color: var(--ink); }
  .eyebrow { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--secondary); }
  .mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
  .prose { max-width: 68ch; color: var(--ink-soft); }

  /* ---- nav ---- */
  nav.tour {
    position: sticky; top: 0; z-index: 10;
    display: flex; gap: 1.4rem; overflow-x: auto;
    padding: 0.9rem 2rem; background: rgba(255,255,255,0.62);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    border-bottom: 1px solid var(--line);
    font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.04em; text-transform: uppercase;
  }
  nav.tour a { color: var(--ink-faint); text-decoration: none; white-space: nowrap; }
  nav.tour a:hover { color: var(--secondary); }

  /* ---- cover ---- */
  .cover {
    padding: 3rem 2rem 3.5rem; border-bottom: 1px solid var(--line);
  }
  .win-bar {
    max-width: 1080px; margin: 0 auto 1.6rem; display: flex; align-items: center; gap: 0.5rem;
    font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-faint);
  }
  .win-bar .dot { width: 10px; height: 10px; border-radius: 50%; }
  .win-bar .r { background: #FF5F57; } .win-bar .y { background: #FEBC2E; } .win-bar .g { background: #28C840; }
  .win-bar .wt { margin-left: 0.3rem; }
  .cover-inner { max-width: 1080px; margin: 0 auto; }
  .cover .mark { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 2.2rem; }
  .cover .mark .box { width: 38px; height: 38px; border-radius: 8px; background: var(--accent); display: flex; align-items: center; justify-content: center; }
  .cover .mark .box svg { width: 20px; height: 20px; }
  .cover .mark span { font-family: var(--font-mono); font-weight: 600; letter-spacing: 0.08em; color: var(--primary); }
  .cover h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 500; margin-bottom: 0.3em; }
  .cover .lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 56ch; margin-bottom: 2.2rem; }
  .cover-meta { display: flex; flex-wrap: wrap; gap: 2rem 3rem; padding-top: 1.4rem; border-top: 1px solid var(--line); }
  .cover-meta div span { display: block; font-family: var(--font-mono); font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); margin-bottom: 0.25em; }
  .cover-meta div strong { font-size: 0.98rem; color: var(--ink); font-weight: 600; }

  main { max-width: 1080px; margin: 0 auto; padding: 0 2rem; }
  section.mod { padding: 4rem 0; border-bottom: 1px solid var(--line); }
  section.mod:last-of-type { border-bottom: none; }
  section.mod h2 { font-size: 1.9rem; margin-bottom: 0.5rem; }
  .section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1.5rem; margin-bottom: 2rem; flex-wrap: wrap; }

  /* ---- pillars ---- */
  .pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 2rem; }
  .pillar { background: var(--paper-raised); border: 1px solid var(--line); border-radius: 10px; padding: 1.3rem;}
  .pillar img { width: 22px; height: 22px; margin-bottom: 0.7rem; }
  .pillar h3 { font-family: var(--font-body); font-size: 0.98rem; font-weight: 600; color: var(--ink); margin-bottom: 0.3em; }
  .pillar p { font-size: 0.88rem; color: var(--ink-soft); margin: 0; }

  /* ---- table ---- */
  .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
  table { width: 100%; border-collapse: collapse; font-size: 0.9rem; background: var(--paper-raised); }
  thead th { text-align: left; font-family: var(--font-mono); font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); background: color-mix(in srgb, var(--primary) 4%, var(--paper-raised)); padding: 0.7rem 1rem; border-bottom: 1px solid var(--line); }
  tbody td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--line); vertical-align: middle; color: var(--ink-soft); }
  tbody tr:last-child td { border-bottom: none; }
  tbody td:first-child { color: var(--ink); font-weight: 500; }

  .pill { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.2rem 0.6rem; border-radius: 999px; font-size: 0.74rem; font-weight: 600; white-space: nowrap; }
  .pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
  .pill.good { background: var(--st-good-tint); color: var(--st-good); }
  .pill.info { background: var(--st-info-tint); color: var(--st-info); }
  .pill.warn { background: var(--st-warn-tint); color: var(--st-warn); }
  .pill.critical { background: var(--st-critical-tint); color: var(--st-critical); }
  .pill.neutral { background: var(--st-neutral-tint); color: var(--st-neutral); }

  /* ---- stat tiles ---- */
  .stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 2.2rem; }
  .stat-tile { background: var(--paper-raised); border: 1px solid var(--line); border-radius: 12px; padding: 1.3rem 1.4rem; }
  .stat-tile .val { font-family: var(--font-display); font-size: 2.3rem; color: var(--primary); line-height: 1; }
  .stat-tile .lbl { font-size: 0.8rem; color: var(--ink-faint); margin-top: 0.4rem; }
  .charts-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 1.4rem; align-items: start; }
  .chart-card { background: var(--paper-raised); border: 1px solid var(--line); border-radius: 12px; padding: 1.4rem; }
  .chart-card h3 { font-family: var(--font-body); font-size: 0.92rem; font-weight: 600; color: var(--ink); margin-bottom: 1rem; }
  .callout { background: color-mix(in srgb, var(--st-warn) 10%, var(--paper-raised)); border: 1px solid color-mix(in srgb, var(--st-warn) 30%, var(--line)); border-radius: 10px; padding: 1rem 1.2rem; margin-top: 1.2rem; font-size: 0.86rem; }
  .callout b { color: var(--st-warn); }

  /* ---- real screenshots ---- */
  .shot-card { margin-top: 1.8rem; border: 1px solid var(--line-strong); border-radius: 12px; overflow: hidden; background: var(--paper-raised); box-shadow: 0 8px 24px color-mix(in srgb, var(--ink) 8%, transparent); }
  .shot-card .shot-label { display: flex; align-items: center; gap: 0.5rem; padding: 0.55rem 0.9rem; border-bottom: 1px solid var(--line); font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-faint); }
  .shot-card .shot-label .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--st-good); flex-shrink: 0; }
  .shot-card img { display: block; width: 100%; height: auto; }

  /* ---- closing ---- */
  .closing { padding: 4rem 0 5rem; text-align: center; }
  .closing h2 { font-size: 2rem; }
  .closing .prose { margin: 0 auto 1.8rem; text-align: left; }
  .cta-row { display: flex; gap: 0.9rem; justify-content: center; flex-wrap: wrap; }
  .btn { font-family: var(--font-body); font-weight: 600; font-size: 0.92rem; padding: 0.75rem 1.4rem; border-radius: 8px; text-decoration: none; display: inline-flex; align-items: center; gap: 0.5rem; }
  .btn.primary { background: var(--accent); color: #1a1206; }
  .btn.ghost { border: 1px solid var(--line-strong); color: var(--ink); }
  footer.foot { text-align: center; padding: 2rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-faint); border-top: 1px solid var(--line); }

  @media (max-width: 860px) {
    .pillars, .charts-grid, .stat-row, .apu-grid { grid-template-columns: 1fr; }
    .cover { padding: 3rem 1.3rem 2.2rem; }
    main { padding: 0 1.3rem; }
    nav.tour { padding: 0.8rem 1.3rem; }
  }
  @media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }
  html { scroll-behavior: smooth; }

  /* ---- glass surfaces ---- */
  .pillar, table, .stat-tile, .chart-card, .shot-card, .formula, .apu-card {
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
  }
  .btn.primary { color: #1a1206; }
  /* ---- athena: fórmula y desglose ---- */
  .formula { background: var(--paper-raised); border: 1px solid var(--line); border-radius: 10px; padding: 1.1rem 1.3rem; margin-top: 1.4rem; font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-soft); line-height: 1.9; }
  .formula b { color: var(--ink); font-weight: 600; }
  .apu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; align-items: start; margin-top: 1.6rem; }
  .apu-card { background: var(--paper-raised); border: 1px solid var(--line); border-radius: 12px; padding: 1.4rem; }
  .apu-card h3 { font-family: var(--font-body); font-size: 0.92rem; font-weight: 600; color: var(--ink); margin-bottom: 0.8rem; }
  .apu-card .code { font-family: var(--font-mono); font-size: 0.72rem; color: var(--secondary); }
  .num { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
  tfoot td { padding: 0.75rem 1rem; font-weight: 600; color: var(--ink); border-top: 1px solid var(--line-strong); background: color-mix(in srgb, var(--accent) 8%, var(--paper-raised)); }
  .note { font-size: 0.82rem; color: var(--ink-faint); margin-top: 0.8rem; }