:root {
    --bg: #eef1ec;
    --surface: #ffffff;
    --surface-2: #f5f7f1;
    --surface-3: #e7ebe3;
    --border: #d6dbd0;
    --border-strong: #b9c1b3;
    --ink: #1c2622;
    --ink-muted: #566058;
    --ink-faint: #7e877e;
    --accent: #0f6b62;
    --accent-strong: #0a4d46;
    --accent-soft: #dcece9;
    --win: #2f7d4f;
    --win-soft: #e2efe4;
    --loss: #a13d2e;
    --loss-soft: #f3e4e0;
    --noresult: #a1731f;
    --noresult-soft: #f0e7d4;
    --nodata: #767f76;
    --nodata-soft: #e6e8e3;
    --shadow: 0 1px 2px rgba(28,38,34,0.06), 0 8px 24px -12px rgba(28,38,34,0.18);
    --font-display: "Fraunces", Georgia, "Times New Roman", serif;
    --font-body: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "IBM Plex Mono", "SF Mono", Consolas, monospace;
  }

  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #10151a;
      --surface: #171e23;
      --surface-2: #1c242a;
      --surface-3: #232c33;
      --border: #2b353c;
      --border-strong: #3a464e;
      --ink: #e7ece6;
      --ink-muted: #a4b0a6;
      --ink-faint: #7a877c;
      --accent: #46bcac;
      --accent-strong: #6fd0c2;
      --accent-soft: #1a3532;
      --win: #5cc189;
      --win-soft: #1a2f22;
      --loss: #e08977;
      --loss-soft: #33221e;
      --noresult: #d9ab5a;
      --noresult-soft: #332a19;
      --nodata: #8b958d;
      --nodata-soft: #232b26;
      --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px -12px rgba(0,0,0,0.5);
    }
  }
  :root[data-theme="dark"] {
    --bg: #10151a;
    --surface: #171e23;
    --surface-2: #1c242a;
    --surface-3: #232c33;
    --border: #2b353c;
    --border-strong: #3a464e;
    --ink: #e7ece6;
    --ink-muted: #a4b0a6;
    --ink-faint: #7a877c;
    --accent: #46bcac;
    --accent-strong: #6fd0c2;
    --accent-soft: #1a3532;
    --win: #5cc189;
    --win-soft: #1a2f22;
    --loss: #e08977;
    --loss-soft: #33221e;
    --noresult: #d9ab5a;
    --noresult-soft: #332a19;
    --nodata: #8b958d;
    --nodata-soft: #232b26;
    --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px -12px rgba(0,0,0,0.5);
  }

  * { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
  }
  @media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
  }

  h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; text-wrap: balance; margin: 0; color: var(--ink); }
  a { color: var(--accent-strong); }
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
  .mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

  /* ---------- Shell layout ---------- */
  .shell {
    display: grid;
    grid-template-columns: 236px minmax(0,1fr);
    max-width: 1280px;
    margin: 0 auto;
  }
  @media (max-width: 900px) {
    .shell { grid-template-columns: 1fr; }
  }

  nav.rail {
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    overflow-y: auto;
    padding: 28px 18px 28px 24px;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 22px;
  }
  @media (max-width: 900px) {
    nav.rail { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--border); padding: 18px 20px; }
    nav.rail .rail-links { flex-direction: row; flex-wrap: wrap; gap: 6px 14px; }
  }
  .brand {
    display: flex; flex-direction: column; gap: 2px;
  }
  .brand .mark {
    font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em;
  }
  .brand .tag {
    font-size: 0.72rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.08em;
  }
  .rail-links { display: flex; flex-direction: column; gap: 2px; }
  .rail-links a {
    text-decoration: none; color: var(--ink-muted); font-size: 0.87rem; padding: 6px 10px; border-radius: 6px;
    border-left: 2px solid transparent;
  }
  .rail-links a:hover { color: var(--ink); background: var(--surface-2); }
  .rail-links a.active { color: var(--accent-strong); border-left-color: var(--accent); background: var(--accent-soft); font-weight: 600; }
  .rail-foot { margin-top: auto; font-size: 0.72rem; color: var(--ink-faint); line-height: 1.5; }

  main { padding: 40px 40px 100px; min-width: 0; }
  @media (max-width: 640px) { main { padding: 28px 18px 80px; } }

  section { scroll-margin-top: 20px; }
  section + section { margin-top: 64px; }

  .eyebrow {
    font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent-strong); font-weight: 600;
    margin-bottom: 8px;
  }
  .section-head { max-width: 74ch; margin-bottom: 26px; }
  .section-head h2 { font-size: clamp(1.5rem, 2.4vw, 1.9rem); }
  .section-head p { color: var(--ink-muted); margin-top: 10px; font-size: 0.98rem; max-width: 62ch; }

  /* ---------- Hero ---------- */
  .hero { padding-bottom: 8px; }
  .hero .eyebrow { margin-bottom: 14px; }
  .hero h1 { font-size: clamp(2rem, 4vw, 2.7rem); max-width: 20ch; }
  .hero .lede { margin-top: 16px; max-width: 66ch; color: var(--ink-muted); font-size: 1.05rem; }
  .hero .lede strong { color: var(--ink); font-weight: 600; }
  .hero .meta-row {
    margin-top: 22px; display: flex; gap: 18px; flex-wrap: wrap; font-size: 0.82rem; color: var(--ink-faint);
  }
  .hero .meta-row span b { color: var(--ink-muted); font-weight: 600; }

  /* ---------- KPI row ---------- */
  .kpi-row {
    margin-top: 34px; display: grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr)); gap: 1px;
    background: var(--border); border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
  }
  .kpi {
    background: var(--surface); padding: 18px 18px 16px;
  }
  .kpi .n { font-family: var(--font-mono); font-size: 1.7rem; font-weight: 600; color: var(--ink); }
  .kpi .n .unit { font-size: 1rem; color: var(--ink-faint); font-weight: 500; }
  .kpi .l { font-size: 0.78rem; color: var(--ink-muted); margin-top: 4px; }

  /* ---------- Pills / tags ---------- */
  .pill {
    display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 100px;
    font-size: 0.72rem; font-weight: 600; letter-spacing: 0.01em; white-space: nowrap;
  }
  .pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
  .pill.win { background: var(--win-soft); color: var(--win); }
  .pill.loss { background: var(--loss-soft); color: var(--loss); }
  .pill.noresult { background: var(--noresult-soft); color: var(--noresult); }
  .pill.nodata { background: var(--nodata-soft); color: var(--nodata); }

  /* ---------- Findings (patrón) ---------- */
  .findings { display: flex; flex-direction: column; gap: 14px; }
  .finding {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px 22px;
    display: grid; grid-template-columns: 40px minmax(0,1fr); gap: 16px; box-shadow: var(--shadow);
  }
  .finding .idx {
    font-family: var(--font-mono); font-size: 0.95rem; color: var(--accent-strong); font-weight: 600;
    background: var(--accent-soft); border-radius: 8px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  }
  .finding h3 { font-size: 1.02rem; font-family: var(--font-body); font-weight: 700; margin-bottom: 6px; }
  .finding p { margin: 0; color: var(--ink-muted); font-size: 0.93rem; }
  .finding .quote { font-style: italic; color: var(--ink); }
  .finding .strength-bar {
    margin-top: 12px; display: flex; align-items: center; gap: 8px; font-size: 0.74rem; color: var(--ink-faint);
  }
  .strength-track { flex: 1; max-width: 160px; height: 5px; background: var(--surface-3); border-radius: 4px; overflow: hidden; }
  .strength-fill { height: 100%; background: var(--accent); border-radius: 4px; }

  /* ---------- Case explorer ---------- */
  .filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
  .filter-group { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
  .filter-group .fg-label { font-size: 0.72rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.06em; margin-right: 2px; }
  .filter-btn {
    font-family: var(--font-body); font-size: 0.8rem; padding: 6px 12px; border-radius: 100px; border: 1px solid var(--border);
    background: var(--surface); color: var(--ink-muted); cursor: pointer;
  }
  .filter-btn:hover { border-color: var(--border-strong); color: var(--ink); }
  .filter-btn.active { background: var(--ink); color: var(--surface); border-color: var(--ink); }
  :root[data-theme="dark"] .filter-btn.active,
  @media (prefers-color-scheme: dark) { }

  .case-count { font-size: 0.82rem; color: var(--ink-faint); margin-bottom: 12px; }

  .case-list { display: flex; flex-direction: column; gap: 10px; }
  .case {
    background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  }
  .case-summary {
    cursor: pointer; padding: 14px 18px; display: grid; grid-template-columns: 96px 1fr auto auto; gap: 14px; align-items: center;
    list-style: none;
  }
  .case-summary::-webkit-details-marker { display: none; }
  @media (max-width: 720px) {
    .case-summary { grid-template-columns: 1fr; row-gap: 8px; }
    .case-summary .case-org { order: 1; }
    .case-summary .case-year { order: 0; }
  }
  .case-year { font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-faint); }
  .case-org { min-width: 0; }
  .case-org .name { font-weight: 600; font-size: 0.94rem; }
  .case-org .exp { font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-faint); margin-top: 2px; }
  .case-score { font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-muted); text-align: right; }
  .case-detail { padding: 0 18px 18px 18px; border-top: 1px solid var(--border); }
  .case-detail p { margin: 12px 0 0; font-size: 0.9rem; color: var(--ink-muted); }
  .case-detail .read { margin-top: 10px; padding: 12px 14px; background: var(--surface-2); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; font-size: 0.87rem; color: var(--ink); }
  details[open] .chev { transform: rotate(90deg); }
  .chev { display: inline-block; transition: transform 0.15s ease; color: var(--ink-faint); }

  /* ---------- Competitors ---------- */
  .competitor-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap: 14px; }
  .competitor {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px;
  }
  .competitor .name { font-weight: 700; font-size: 0.98rem; }
  .competitor .freq { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-strong); background: var(--accent-soft); padding: 2px 8px; border-radius: 100px; display: inline-block; margin-top: 6px; }
  .competitor p { font-size: 0.86rem; color: var(--ink-muted); margin: 10px 0 0; }

  /* ---------- Model / process ---------- */
  .process { display: flex; flex-direction: column; gap: 0; counter-reset: step; }
  .step {
    display: grid; grid-template-columns: 44px minmax(0,1fr); gap: 18px; position: relative; padding-bottom: 30px;
  }
  .step:last-child { padding-bottom: 0; }
  .step::before {
    counter-increment: step; content: counter(step);
    font-family: var(--font-mono); font-weight: 600; font-size: 0.95rem;
    width: 40px; height: 40px; border-radius: 50%; background: var(--surface); border: 1.5px solid var(--accent); color: var(--accent-strong);
    display: flex; align-items: center; justify-content: center; z-index: 1;
  }
  .step:not(:last-child)::after {
    content: ""; position: absolute; left: 19px; top: 40px; bottom: 0; width: 1.5px; background: var(--border-strong);
  }
  .step .step-body h3 { font-family: var(--font-body); font-size: 1rem; font-weight: 700; margin-bottom: 6px; padding-top: 8px; }
  .step .step-body p { margin: 0; font-size: 0.92rem; color: var(--ink-muted); max-width: 68ch; }

  .confidence-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 12px; margin-top: 30px; }
  .confidence {
    border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; background: var(--surface);
  }
  .confidence .lvl { font-family: var(--font-mono); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; }
  .confidence.alto .lvl { color: var(--win); }
  .confidence.medio .lvl { color: var(--noresult); }
  .confidence.bajo .lvl { color: var(--loss); }
  .confidence p { margin: 6px 0 0; font-size: 0.83rem; color: var(--ink-muted); }

  /* ---------- Corpus state (year bars) ---------- */
  .year-block { border: 1px solid var(--border); border-radius: 12px; padding: 20px 22px; background: var(--surface); }
  .year-block + .year-block { margin-top: 14px; }
  .year-block .yb-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
  .year-block .yb-head h3 { font-family: var(--font-mono); font-size: 1.1rem; }
  .year-block .yb-head .yb-status { font-size: 0.78rem; color: var(--ink-faint); }
  .bar-stack { margin-top: 14px; height: 22px; border-radius: 6px; overflow: hidden; display: flex; background: var(--surface-3); }
  .bar-seg { height: 100%; }
  .bar-legend { display: flex; flex-wrap: wrap; gap: 10px 16px; margin-top: 10px; font-size: 0.78rem; color: var(--ink-muted); }
  .bar-legend span { display: inline-flex; align-items: center; gap: 6px; }
  .bar-legend i { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }

  /* ---------- Caveat / callout ---------- */
  .callout {
    border: 1px solid var(--border-strong); border-left: 3px solid var(--noresult); background: var(--noresult-soft);
    border-radius: 0 10px 10px 0; padding: 16px 20px; font-size: 0.88rem; color: var(--ink);
  }
  .callout b { font-weight: 700; }
  .callout.accent { border-left-color: var(--accent); background: var(--accent-soft); }

  footer.page-foot {
    margin-top: 80px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 0.78rem; color: var(--ink-faint);
  }

[hidden] { display: none !important; }

/* ---------- Auth screen ---------- */
.auth-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--bg); padding: 24px;
}
.auth-card {
  width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 32px 30px; box-shadow: var(--shadow);
}
.auth-card .brand { margin-bottom: 22px; }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form h2 { font-size: 1.2rem; }
.auth-hint { font-size: 0.85rem; color: var(--ink-muted); margin: 0 0 4px; }
.auth-form label { display: flex; flex-direction: column; gap: 5px; font-size: 0.82rem; color: var(--ink-muted); font-weight: 600; }
.auth-form input, .auth-form select {
  font: inherit; padding: 9px 11px; border-radius: 8px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--ink); font-size: 0.92rem;
}
.auth-form button {
  margin-top: 6px; padding: 10px 14px; border-radius: 8px; border: none; background: var(--accent);
  color: #fff; font-weight: 600; font-size: 0.92rem; cursor: pointer;
}
.auth-form button:hover { background: var(--accent-strong); }
.auth-form.inline { max-width: 420px; }
.auth-error { color: var(--loss); font-size: 0.82rem; min-height: 1em; }
.auth-ok { color: var(--win); font-size: 0.82rem; }

.account-card { max-width: 420px; }
.btn-secondary {
  margin-top: 18px; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--ink); font-size: 0.85rem; cursor: pointer;
}
.btn-secondary:hover { border-color: var(--ink-faint); }

.users-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.users-table th, .users-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.users-table th { color: var(--ink-faint); font-weight: 600; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; }
.users-table button { font-size: 0.78rem; padding: 4px 9px; border-radius: 6px; border: 1px solid var(--border-strong); background: var(--surface); cursor: pointer; margin-right: 6px; }
.users-table button.danger { color: var(--loss); border-color: var(--loss); }