/* ============================================================
   Nokor Portal — editorial research page (Tesseract design system)
   Light palette is default; dark OS preference served via the
   @media (prefers-color-scheme: dark) block at the bottom.
   a11y: WCAG 2.2 AA text (4.5:1) + non-text (3:1) contrast,
         focus-visible rings, reduced-motion.
   ============================================================ */

:root {
  /* surfaces */
  --bg:        #F5F3F8;
  --bg-2:      #FFFFFF;
  --bg-3:      #EDE8F2;
  --surface:   #F0ECF5;

  /* ink — all ≥ 4.5:1 on --bg */
  --ink:       #0B0E14;
  --ink-2:     #2F3647;
  --ink-3:     #525A6E;
  --muted:     #6A7286;
  --muted-2:   #8A90A0;

  /* borders */
  --border:    #D5DAE2;
  --border-2:  #C8CDD8;
  --border-3:  #8A90A0;

  /* elevation */
  --card-shadow: 0 1px 2px rgba(15,20,35,0.05), 0 1px 1px rgba(15,20,35,0.03);

  /* accent */
  --accent:        #CC00CC;
  --accent-2:      #AA00AA;
  --accent-bright: #EE00EE;
  --accent-surface:rgba(238,0,238,0.10);
  --accent-on:     #FFFFFF;

  /* pass / fail */
  --pass:          #0E8F4B;
  --pass-surface:  #D4F4E1;
  --fail:          #B5171F;
  --fail-surface:  #FDE1E1;

  /* quality tiers */
  --tier-clean:    #0E8F4B;
  --tier-clean-s:  #D4F4E1;
  --tier-fixable:  #B8860B;
  --tier-fixable-s:#FFF3CD;
  --tier-degraded: #B5171F;
  --tier-degraded-s:#FDE1E1;
  --tier-broken:   #6A7286;
  --tier-broken-s: #EEF0F4;

  /* nokor-specific: difficulty colors */
  --nk-hard:    #2A5CB8;
  --nk-vhard:   #B8860B;
  --nk-expert:  #B5171F;

  /* focus ring */
  --focus-ring: 0 0 0 2px var(--bg-2), 0 0 0 4px var(--accent-2);

  /* motion */
  --ease-ui:   cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-out:  cubic-bezier(0.28, 0.11, 0.32, 1);
  --ease-in:   cubic-bezier(0.55, 0, 0.75, 0.25);
  --dur-xfast: 140ms;
  --dur-fast:  200ms;
  --dur-normal:400ms;
  --dur-med:   400ms;
  --dur-slow:  640ms;

  /* type */
  --font-sans:    'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --font-display: 'Cormorant', Georgia, 'Times New Roman', serif;

  /* scale */
  --s-wordmark: clamp(26px, 2.4vw, 34px);
  --s-thesis:   clamp(28px, 3.2vw, 44px);
  --s-reveal:   clamp(32px, 4.2vw, 56px);
  --s-h2:       28px;
  --s-h3:       20px;
  --s-body:     17px;
  --s-small:    15px;
  --s-ui:       14px;
  --s-mono:     14px;

  --lh-body:   1.62;
  --ls-tight:  -0.02em;
  --ls-wide:   0.12em;
  --ls-badge:  0.20em;

  /* layout */
  --max-page:    1200px;
  --max-prose:   720px;
  --gap-section: 88px;
  --pad-x:       56px;
  --pad-x-mob:   20px;
  --hairline:    1px solid var(--border);
}

/* ---------- reset --------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: var(--bg); scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans) !important;
  font-size: var(--s-body) !important;
  line-height: var(--lh-body);
  color: var(--ink-2);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11", "cv05", "cv08";
}
code, .mono {
  font-family: var(--font-mono) !important;
  font-size: 0.92em;
  font-variant-numeric: tabular-nums;
}
h1, h2, h3, h4, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: transparent; border: 0; cursor: pointer; padding: 0; }
b, strong { font-weight: 600; color: var(--ink); }
em { font-style: italic; color: var(--ink); }
img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--accent); color: var(--accent-on); }

/* ---------- a11y ---------------------------------------- */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* GLOBAL focus ring */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[role="tab"]:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ---------- scroll progress ----------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  z-index: 90;
  pointer-events: none;
  transform-origin: 0 0;
}

/* ---------- portal shell -------------------------------- */
.nk-portal {
  font-family: var(--font-sans);
  color: var(--ink-2);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg);
}

/* Kill Odoo portal wrapper chrome */
body:has(.nk-portal) {
  background: var(--bg) !important;
}
body:has(.nk-portal) #wrapwrap,
body:has(.nk-portal) .o_portal,
body:has(.nk-portal) .o_portal_wrap,
body:has(.nk-portal) main,
body:has(.nk-portal) .oe_website_login_container,
body:has(.nk-portal) .container,
body:has(.nk-portal) .container-fluid {
  max-width: 100% !important;
  width: 100% !important;
  padding: 0 !important;
  margin: 0 !important;
  background: transparent !important;
}
body:has(.nk-portal) header:not(.masthead),
body:has(.nk-portal) .o_portal_navbar,
body:has(.nk-portal) .breadcrumb,
body:has(.nk-portal) .o_portal_submenu {
  display: none !important;
}
body:has(.nk-portal) footer:not(.foot),
body:has(.nk-portal) .o_footer,
body:has(.nk-portal) #footer,
body:has(.nk-portal) .oe_structure.oe_empty,
body:has(.nk-portal) div[id="footer"],
body:has(.nk-portal) .o_footer_copyright {
  display: none !important;
}

.nk-portal * {
  box-sizing: border-box;
}

/* ---------- page shell ---------------------------------- */
.page {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: 40px var(--pad-x) 80px;
}
@media (max-width: 768px) {
  .page { padding: 28px var(--pad-x-mob) 56px; }
}

hr.rule {
  border: 0; height: 2px;
  background:
    linear-gradient(90deg,
      var(--accent-bright) 0,
      var(--accent-bright) 120px,
      var(--border) 120px,
      var(--border) 100%);
  margin: 22px 0;
}

/* ---------- sections ------------------------------------ */
.section {
  margin-bottom: var(--gap-section);
  scroll-margin-top: 32px;
}
.section:last-of-type { margin-bottom: 0; }

.section-label {
  font-family: var(--font-mono) !important;
  font-size: var(--s-ui) !important;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: var(--hairline);
  text-align: left;
}

.section-desc {
  max-width: var(--max-prose);
  font-size: var(--s-small);
  color: var(--ink-2);
  margin-bottom: 28px;
}
.section-desc b { color: var(--ink); }

/* ---------- scroll-trigger animations ------------------- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
[data-animate].in-view {
  opacity: 1;
  transform: translateY(0);
}
[data-delay="1"] { transition-delay: 80ms; }
[data-delay="2"] { transition-delay: 160ms; }
[data-delay="3"] { transition-delay: 240ms; }
[data-delay="4"] { transition-delay: 320ms; }
[data-delay="5"] { transition-delay: 400ms; }

/* ============================================================
   MASTHEAD
   ============================================================ */
.masthead {
  margin-bottom: 72px;
  position: relative;
  overflow: visible;
  padding: 0;
  background: none;
  text-align: left;
}

.mast-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: none;
  margin: 0;
  position: relative;
  z-index: 1;
}

.wordmark {
  font-family: var(--font-display);
  font-size: var(--s-wordmark);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--ink);
  line-height: 1.1;
  margin: 0;
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: unset;
  background-clip: unset;
}

.badge {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  font-weight: 500;
  letter-spacing: var(--ls-badge);
  text-transform: uppercase;
  color: var(--accent);
  padding: 7px 14px;
  border: 1px solid var(--accent);
  white-space: nowrap;
  display: inline-block;
  margin-bottom: 0;
  backdrop-filter: none;
  background: transparent;
}

.thesis {
  font-family: var(--font-display);
  font-size: var(--s-thesis);
  line-height: 1.15;
  letter-spacing: var(--ls-tight);
  color: var(--ink);
  font-weight: 500;
  max-width: 860px;
  margin-top: 36px;
}
.thesis em { color: var(--accent); font-style: italic; font-weight: 500; }

.byline {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.byline a {
  color: var(--ink-2);
  border-bottom: 1px solid var(--border-2);
  text-decoration: none;
  transition: color var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui);
}
.byline a:hover {
  color: var(--ink);
  border-color: var(--ink-3);
}

/* ── Overview grid ───────────────────────────────────────── */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}
@media (max-width: 900px) {
  .overview-grid { grid-template-columns: 1fr; gap: 28px; }
}

.prose {
  max-width: var(--max-prose);
  font-size: var(--s-body);
  color: var(--ink-2);
  line-height: var(--lh-body);
}
.prose p + p { margin-top: 1em; }

.capabilities {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}
.capabilities li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: var(--s-small);
  color: var(--ink-2);
  padding: 6px 0;
  border-bottom: var(--hairline);
}
.capabilities li:last-child { border-bottom: none; }
.capabilities li::before {
  content: "\2192";
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

/* ── Glance sidebar ──────────────────────────────────────── */
.glance {
  padding: 20px 22px;
  border: var(--hairline);
  border-left: 3px solid var(--accent);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
  position: relative;
}
.glance-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--accent);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: var(--hairline);
}
.glance-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.glance-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 13px;
  gap: 12px;
}
.glance-row dt { color: var(--ink-3); }
.glance-row dd { margin: 0; font-weight: 500; color: var(--ink); font-variant-numeric: tabular-nums; }
.glance-row dd b { font-weight: 700; color: var(--ink); }
.glance-foot {
  margin-top: 14px;
  padding-top: 10px;
  border-top: var(--hairline);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

/* ── Funnel ──────────────────────────────────────────────── */
.funnel {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 0;
  border: var(--hairline);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
}
.funnel-step {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}
.funnel-step--final {
  background: var(--accent-surface);
  border-left: 3px solid var(--accent-bright);
}
.funnel-step--final .funnel-num { color: var(--accent); }
.funnel-step--final .funnel-unit { color: var(--accent); }
.funnel-num {
  font-family: var(--font-display);
  font-size: clamp(32px, 3.4vw, 48px);
  font-weight: 500;
  color: var(--ink);
  line-height: 1;
  font-variant-numeric: tabular-nums lining-nums;
}
.funnel-unit {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-2);
}
.funnel-sub {
  font-size: 12px;
  color: var(--muted);
}
.funnel-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  font-size: 18px;
  color: var(--muted);
}
@media (max-width: 768px) {
  .funnel { grid-template-columns: 1fr; }
  .funnel-step { border-bottom: var(--hairline); }
  .funnel-step:last-child { border-bottom: 0; }
  .funnel-arrow { transform: rotate(90deg); padding: 8px 0; justify-content: center; }
}

/* ── Pipeline ────────────────────────────────────────────── */
.pipeline-frame {
  background:
    linear-gradient(180deg, color-mix(in oklab, var(--accent-bright) 18%, transparent), transparent 40%),
    var(--bg-2);
  border: var(--hairline);
  border-left: 3px solid var(--accent-bright);
  padding: 40px 36px 36px;
  box-shadow: var(--card-shadow);
}
@media (max-width: 768px) {
  .pipeline-frame { padding: 28px 20px; }
}

.pipeline-intro { margin-bottom: 28px; }
.pipeline-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.pipeline-title {
  font-size: var(--s-h2);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: var(--ls-tight);
  max-width: 600px;
}
.pipeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: var(--hairline);
}
@media (max-width: 900px) {
  .pipeline { grid-template-columns: 1fr; }
}
.phase {
  padding: 24px 22px;
  border-right: var(--hairline);
  transition: background var(--dur-fast) var(--ease-ui);
}
.phase:last-child { border-right: 0; }
.phase:hover { background: color-mix(in oklab, var(--accent) 6%, transparent); }
@media (max-width: 900px) {
  .phase { border-right: 0; border-bottom: var(--hairline); }
  .phase:last-child { border-bottom: 0; }
}
.phase-label {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.phase-title {
  font-size: var(--s-h3);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.phase-body {
  font-size: var(--s-small);
  color: var(--ink-2);
  line-height: 1.55;
  list-style: disc;
  padding-left: 16px;
}
.phase-body li { padding: 2px 0; }

/* ── Reveal block ────────────────────────────────────────── */
.reveal {
  border-left: 3px solid var(--accent-bright);
  padding: 10px 0 10px 24px;
  margin-bottom: 40px;
  max-width: 960px;
}
.reveal-line {
  font-size: clamp(22px, 2.8vw, 32px) !important;
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: var(--ls-tight);
  font-weight: 400;
}
.reveal-line + .reveal-line { margin-top: 10px; }
.reveal-big {
  font-family: var(--font-display) !important;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.reveal-kicker { color: var(--ink-2); }
.reveal-kicker b { color: var(--ink); }

/* ── Results summary (Nokor-specific) ────────────────────── */
.results-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (max-width: 768px) {
  .results-summary { grid-template-columns: 1fr; }
}
.result-card {
  background: var(--bg-2);
  border: var(--hairline);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--card-shadow);
  text-align: left;
}
.result-card--primary {
  border-left: 3px solid var(--accent-bright);
  background: linear-gradient(180deg, var(--accent-surface), color-mix(in oklab, var(--accent-surface) 30%, var(--bg-2)));
}
.result-model {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.result-card--primary .result-model { color: var(--accent); }
.result-score {
  font-family: var(--font-display);
  font-size: clamp(32px, 3.4vw, 44px);
  font-weight: 500;
  color: var(--ink);
  line-height: 1;
  letter-spacing: var(--ls-tight);
  font-variant-numeric: tabular-nums lining-nums;
}
.result-card--primary .result-score { color: var(--accent); }
.result-score small { font-size: 0.5em; }
.result-detail {
  margin-top: auto;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ── Quality grid (Model comparison) ─────────────────────── */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
@media (max-width: 768px) {
  .quality-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .quality-grid { grid-template-columns: 1fr; }
}

.quality-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  border: var(--hairline);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
  text-align: left;
}
.quality-clean { border-left: 3px solid var(--tier-clean); }
.quality-clean .au-quality-num,
.quality-clean .nk-quality-num { color: var(--tier-clean); }
.quality-fixable { border-left: 3px solid var(--tier-fixable); }
.quality-fixable .au-quality-num,
.quality-fixable .nk-quality-num { color: var(--tier-fixable); }
.quality-degraded { border-left: 3px solid var(--tier-degraded); }
.quality-degraded .au-quality-num,
.quality-degraded .nk-quality-num { color: var(--tier-degraded); }
.quality-broken { border-left: 3px solid var(--tier-broken); }
.quality-broken .au-quality-num,
.quality-broken .nk-quality-num { color: var(--tier-broken); }

.au-quality-num, .nk-quality-num {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 500;
  line-height: 1;
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: var(--ls-tight);
}

.quality-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  margin-top: 8px;
  color: var(--ink-2);
}

.quality-pct {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  letter-spacing: 0.02em;
}

/* ── Confidence strip ────────────────────────────────────── */
.confidence-strip {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 22px 24px;
  border: var(--hairline);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
}
.au-confidence-big, .nk-confidence-big {
  font-family: var(--font-display);
  font-size: clamp(32px, 3.4vw, 44px);
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
  letter-spacing: var(--ls-tight);
  font-variant-numeric: tabular-nums lining-nums;
}
.confidence-lbl {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
}
@media (max-width: 768px) {
  .confidence-strip { flex-direction: column; gap: 20px; }
}

/* ── Distribution (Nokor-specific) ───────────────────────── */
.distribution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
@media (max-width: 768px) {
  .distribution-grid { grid-template-columns: 1fr; }
}
.dist-card {
  background: var(--bg-2);
  border: var(--hairline);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--card-shadow);
  text-align: left;
}
.dist-pct {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 500;
  color: var(--ink);
  line-height: 1;
  letter-spacing: var(--ls-tight);
  font-variant-numeric: tabular-nums lining-nums;
}
.dist-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-2);
}
.dist-badge {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono) !important;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  align-self: flex-start;
}
.dist-badge--hard  { color: var(--nk-hard); background: #E5EDFB; border-color: var(--nk-hard); }
.dist-badge--vhard { color: var(--nk-vhard); background: var(--tier-fixable-s); border-color: var(--nk-vhard); }
.dist-badge--expert { color: var(--nk-expert); background: var(--fail-surface); border-color: var(--nk-expert); }

/* Modality strip */
.modality-strip {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 22px 24px;
  border: var(--hairline);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
  flex-wrap: wrap;
}
.mod-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.mod-pct {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 500;
  color: var(--accent);
  font-variant-numeric: tabular-nums lining-nums;
}
.mod-name {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-3);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

/* ============================================================
   KPI ROW / DATASET VIEWER
   ============================================================ */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}
@media (max-width: 900px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
  .kpi-row { grid-template-columns: 1fr; }
}

.kpi-card {
  border: var(--hairline);
  background: var(--bg-2);
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 128px;
  transition:
    border-color var(--dur-fast) var(--ease-ui),
    background var(--dur-fast) var(--ease-ui),
    box-shadow var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
  box-shadow: var(--card-shadow);
}
.kpi-card:hover {
  border-color: var(--border-2);
  box-shadow: 0 4px 12px rgba(15,20,35,0.07), 0 1px 2px rgba(15,20,35,0.05);
  transform: translateY(-1px);
}
.kpi-card--accent {
  border-left: 3px solid var(--accent-bright);
  background: linear-gradient(180deg, var(--accent-surface), color-mix(in oklab, var(--accent-surface) 30%, var(--bg-2)));
}

.kpi-label {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}

.kpi-big {
  font-family: var(--font-display);
  font-size: clamp(32px, 3.4vw, 44px);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: var(--ls-tight);
  line-height: 1;
  font-variant-numeric: tabular-nums lining-nums;
}
.kpi-card--accent .kpi-big { color: var(--accent); }
.kpi-big small { font-size: 0.5em; }

.kpi-sub {
  margin-top: auto;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kpi-value { margin-top: auto; }

/* ── Eval controls ─────────────────────────────────────────── */
.eval-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.eval-search {
  flex: 1;
  min-width: 200px;
  position: relative;
}
.eval-search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--muted);
  pointer-events: none;
}
.eval-search input {
  width: 100%;
  padding: 10px 12px 10px 36px;
  font-size: var(--s-ui);
  font-family: var(--font-mono) !important;
  border: var(--hairline);
  background: var(--bg-2);
  color: var(--ink);
  outline: none;
  transition: border-color var(--dur-fast) var(--ease-ui), box-shadow var(--dur-fast) var(--ease-ui);
}
.eval-search input:focus {
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}
.eval-search input::placeholder { color: var(--muted); }

.eval-filters {
  display: flex;
  gap: 8px;
}
.eval-filters select {
  padding: 10px 32px 10px 12px;
  font-size: var(--s-ui);
  font-family: var(--font-mono) !important;
  border: var(--hairline);
  background: var(--bg-2);
  color: var(--ink-2);
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%23525A6E' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--dur-fast) var(--ease-ui);
}
.eval-filters select:focus { border-color: var(--accent); }

.sort-dir-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 16px;
  font-weight: 600;
  border: var(--hairline);
  background: var(--bg-2);
  color: var(--accent);
  cursor: pointer;
  transition: all var(--dur-xfast) var(--ease-ui);
  flex-shrink: 0;
}
.sort-dir-btn:hover { background: var(--accent-surface); border-color: var(--accent); }

.eval-meta {
  font-family: var(--font-mono) !important;
  font-size: var(--s-ui);
  color: var(--ink-3);
  white-space: nowrap;
}

/* ── Eval table ─────────────────────────────────────────────── */
.eval-table-wrap {
  border: var(--hairline);
  overflow: hidden;
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
}

.eval-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono) !important;
  font-size: var(--s-mono) !important;
  table-layout: fixed;
}

.eval-table thead {
  background: var(--bg-3);
  border-bottom: 1px solid var(--border-2);
}

.eval-table th {
  padding: 12px 14px;
  font-family: var(--font-mono) !important;
  font-size: var(--s-ui);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  text-align: left;
  white-space: nowrap;
  user-select: none;
  position: sticky;
  top: 0;
  background: var(--bg-3);
  z-index: 2;
  border-bottom: 1px solid var(--border-2);
}

.eval-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  color: var(--ink-2);
  font-family: var(--font-mono) !important;
  font-size: var(--s-mono) !important;
}

.eval-table tbody tr {
  cursor: pointer;
  transition: background var(--dur-xfast) var(--ease-ui);
}
.eval-table tbody tr:hover {
  background: color-mix(in oklab, var(--accent) 6%, transparent);
}
.eval-table tbody tr.row-expanded {
  background: var(--accent-surface);
}

/* ── Outcome badges ──────────────────────────────────────── */
.outcome-pass {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent-bright);
  color: var(--accent-on);
  border: 1px solid var(--accent-bright);
}
.outcome-fail {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--fail-surface);
  color: var(--fail);
  border: 1px solid color-mix(in oklab, var(--fail) 40%, transparent);
}

/* ── Difficulty badges ───────────────────────────────────── */
.diff-badge {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono) !important;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid currentColor;
}
.diff-badge--level-1   { color: var(--nk-hard); background: #E5EDFB; border-color: var(--nk-hard); }
.diff-badge--level-2   { color: var(--nk-vhard); background: var(--tier-fixable-s); border-color: var(--nk-vhard); }
.diff-badge--level-3   { color: var(--nk-expert); background: var(--fail-surface); border-color: var(--nk-expert); }

/* ── Expand button ───────────────────────────────────────── */
.expand-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  transition: transform var(--dur-fast) var(--ease-out);
  color: var(--ink-3);
}
.expand-btn svg { width: 14px; height: 14px; }
.expand-btn.expanded {
  transform: rotate(90deg);
  color: var(--accent);
}

/* ── Expanded detail rows ─────────────────────────────────── */
.detail-row td {
  padding: 0 !important;
  border-top: none !important;
  background: var(--bg-3);
}

.detail-content {
  padding: 24px 32px;
  animation: nk-slide-down 0.25s var(--ease-out);
}
@keyframes nk-slide-down {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 600px; }
}

.eval-detail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
@media (max-width: 768px) {
  .eval-detail-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .eval-detail-grid { grid-template-columns: 1fr; }
}

.detail-block {
  background: var(--bg-2);
  border: var(--hairline);
  border-left: 3px solid var(--accent);
  padding: 20px;
  box-shadow: var(--card-shadow);
}

.detail-block-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--accent);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: var(--hairline);
}

.detail-row-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 7px 0;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  gap: 16px;
  font-family: var(--font-mono);
}
.detail-row-item:last-child { border-bottom: none; }

.detail-key {
  color: var(--ink-3);
  flex-shrink: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.detail-val {
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  text-align: right;
  word-break: break-word;
}

.detail-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  padding: 6px 14px;
  border: 1px solid var(--accent);
  transition: all var(--dur-xfast) var(--ease-ui);
  cursor: pointer;
  background: none;
}
.detail-link:hover {
  background: var(--accent);
  color: var(--accent-on);
  text-decoration: none;
}

/* ── Pagination ──────────────────────────────────────────── */
.eval-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 16px 0 0;
}

.eval-pagination button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  font-weight: 500;
  color: var(--ink-2);
  background: var(--bg-2);
  border: var(--hairline);
  cursor: pointer;
  transition: border-color var(--dur-xfast) var(--ease-ui), color var(--dur-xfast) var(--ease-ui), background var(--dur-xfast) var(--ease-ui);
  text-decoration: none;
}
.eval-pagination button:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.eval-pagination button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-on);
  font-weight: 700;
}
.eval-pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ============================================================
   METHODOLOGY (Nokor-specific)
   ============================================================ */
.methodology-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (max-width: 768px) {
  .methodology-grid { grid-template-columns: 1fr; }
}
.meth-card {
  background: var(--bg-2);
  border: var(--hairline);
  padding: 20px;
  box-shadow: var(--card-shadow);
}
.meth-num {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
  display: block;
}
.meth-title {
  font-size: var(--s-h3);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.meth-desc {
  font-size: var(--s-small);
  color: var(--ink-2);
  line-height: 1.55;
}

/* ============================================================
   RESOURCES
   ============================================================ */
.resources {
  display: grid;
  gap: 16px;
}
@media (max-width: 760px) {
  .resources { grid-template-columns: 1fr !important; }
}
.resource {
  position: relative;
  display: block;
  padding: 24px 26px;
  border: var(--hairline);
  background: var(--bg-2);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--card-shadow);
  transition: border-color var(--dur-fast) var(--ease-ui), transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.resource:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(15,20,35,0.08), 0 1px 2px rgba(15,20,35,0.04);
}
.res-label {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.res-title {
  font-size: var(--s-h3);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.res-url {
  font-size: 13px;
  color: var(--ink-3);
  word-break: break-all;
}
.res-arrow {
  position: absolute;
  top: 24px;
  right: 26px;
  color: var(--ink-3);
  transition: color var(--dur-fast) var(--ease-ui), transform var(--dur-fast) var(--ease-ui);
}
.resource:hover .res-arrow {
  color: var(--accent);
  transform: translateX(3px);
}

/* ============================================================
   LINKS ROW
   ============================================================ */
.links-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  background: var(--bg-2);
  border: var(--hairline);
  text-decoration: none;
  box-shadow: var(--card-shadow);
  transition: border-color var(--dur-fast) var(--ease-ui), background var(--dur-fast) var(--ease-ui), color var(--dur-fast) var(--ease-ui), box-shadow var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.link-btn:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(15,20,35,0.08), 0 1px 2px rgba(15,20,35,0.04);
  color: var(--ink);
  text-decoration: none;
}
.link-btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ============================================================
   FOOTER
   ============================================================ */
.foot {
  margin-top: var(--gap-section);
  padding-top: 26px;
  border-top: var(--hairline);
  text-align: center;
}
.foot-inner p {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0;
}

/* ============================================================
   THEME TOGGLE
   ============================================================ */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 50;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: var(--bg-2);
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-ui), background var(--dur-fast) var(--ease-ui), transform var(--dur-fast) var(--ease-ui);
  box-shadow: 0 2px 8px rgba(15,20,35,0.06);
  padding: 0;
}
.theme-toggle:hover {
  border-color: var(--border-3);
  background: var(--bg-3);
}
.theme-toggle:active { transform: scale(0.95); }
.theme-toggle svg { width: 18px; height: 18px; display: block; }

.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }

:root[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

@media (max-width: 640px) {
  .theme-toggle { top: 12px; right: 12px; width: 36px; height: 36px; }
  .theme-toggle svg { width: 16px; height: 16px; }
}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: rgba(15, 20, 35, 0.78);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--dur-normal) var(--ease-out);
  pointer-events: none;
}
.lightbox[data-open] {
  opacity: 1;
  pointer-events: auto;
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #F3F5F9;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  cursor: pointer;
  transition: background var(--dur-xfast) var(--ease-ui);
}
.lightbox-close:hover { background: rgba(255,255,255,0.18); }
.lightbox-figure {
  max-width: min(1200px, 92vw);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.lightbox-figure img {
  display: block;
  max-width: 100%;
  max-height: calc(92vh - 60px);
  background: var(--bg-2);
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  object-fit: contain;
}
.lightbox-figure iframe {
  width: 80vw;
  height: 80vh;
  border: none;
  background: #fff;
}
.lightbox-figure video {
  max-width: 85vw;
  max-height: 80vh;
  background: #000;
  outline: none;
}
.lightbox-caption {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  color: #C8CDD8;
  text-align: center;
}
.lightbox-external-link {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-bright);
  text-decoration: none;
  border: 1px solid var(--accent);
  padding: 6px 14px;
  letter-spacing: 0.04em;
  transition: background var(--dur-xfast) var(--ease-ui), color var(--dur-xfast) var(--ease-ui);
}
.lightbox-external-link:hover {
  background: var(--accent);
  color: var(--accent-on);
}

@media (max-width: 640px) {
  .lightbox { padding: 16px; }
  .lightbox-close { top: 12px; right: 12px; width: 36px; height: 36px; font-size: 20px; }
}

/* ============================================================
   CHARTS
   ============================================================ */
.charts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
@media (max-width: 768px) {
  .charts { grid-template-columns: 1fr; gap: 16px; }
}
.chart {
  margin: 0;
  border: var(--hairline);
  background: var(--bg-2);
  padding: 14px;
  box-shadow: var(--card-shadow);
  min-width: 0;
  overflow: hidden;
  transition:
    border-color var(--dur-fast) var(--ease-ui),
    box-shadow var(--dur-fast) var(--ease-out);
}
.chart:hover {
  border-color: var(--border-2);
  box-shadow: 0 4px 12px rgba(15,20,35,0.07), 0 1px 2px rgba(15,20,35,0.05);
}
.chart--hero { grid-column: 1 / -1; }
.chart-trigger {
  display: block;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.chart-trigger img {
  width: 100%;
  height: auto;
  display: block;
  background: var(--bg-2);
  min-height: 180px;
  object-fit: contain;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out);
}
.chart-trigger img:hover { transform: scale(1.015); }
.chart-zoom-hint {
  position: absolute;
  bottom: 12px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--bg-2);
  background: rgba(11,14,20,0.7);
  padding: 4px 10px;
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-ui);
  pointer-events: none;
}
.chart-trigger:hover .chart-zoom-hint { opacity: 1; }
.chart figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  color: var(--ink-3);
  line-height: 1.5;
}

/* Theme-aware chart images */
.chart-trigger img.nk-chart-light { display: block; }
.chart-trigger img.nk-chart-dark  { display: none; }
:root[data-theme="dark"] .chart-trigger img.nk-chart-light { display: none; }
:root[data-theme="dark"] .chart-trigger img.nk-chart-dark  { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .chart-trigger img.nk-chart-light { display: none; }
  :root:not([data-theme]) .chart-trigger img.nk-chart-dark  { display: block; }
}

/* ── Thesis word split ───────────────────────────────────── */
.thesis-word {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
}
.thesis-word-inner {
  display: inline-block;
}

/* ── Skip link ───────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  background: var(--accent);
  color: var(--accent-on);
  z-index: 100;
  transition: top var(--dur-fast) var(--ease-ui);
}
.skip-link:focus { top: 16px; }

/* ============================================================
   RESPONSIVE — 768px
   ============================================================ */
@media (max-width: 768px) {
  .masthead { margin-bottom: 48px; }
  .wordmark { font-size: clamp(22px, 5vw, 28px); }
  .thesis { font-size: clamp(20px, 4vw, 28px); margin-top: 20px; }

  .eval-controls { flex-direction: column; }
  .eval-filters { flex-direction: column; width: 100%; }
  .eval-filters select { width: 100%; }
}

/* ============================================================
   RESPONSIVE — 480px
   ============================================================ */
@media (max-width: 480px) {
  .wordmark { font-size: clamp(20px, 5vw, 24px); }
}

/* ============================================================
   RESPONSIVE — 640px
   ============================================================ */
@media (max-width: 640px) {
  :root { --pad-x: 20px; --gap-section: 56px; }
}

/* ============================================================
   RESPONSIVE — 900px
   ============================================================ */
@media (max-width: 900px) {
  :root { --pad-x: 32px; --gap-section: 72px; }
  .overview-grid { grid-template-columns: 1fr; gap: 28px; }
  .results-summary { grid-template-columns: 1fr; }
  .distribution-grid { grid-template-columns: 1fr; }
  .methodology-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-animate] { opacity: 1; transform: none; }
}

/* ============================================================
   DARK MODE
   Two activation paths:
   1. User toggle — :root[data-theme="dark"] (explicit)
   2. OS fallback — :root:not([data-theme]) inside prefers-color-scheme
   ============================================================ */
:root[data-theme="dark"],
:root[data-theme="dark"] body {
  color-scheme: dark;
}
:root[data-theme="dark"] {
  /* surfaces */
  --bg:        #0B0E14;
  --bg-2:      #151A28;
  --bg-3:      #1E2436;
  --surface:   #192030;

  /* no shadows in dark */
  --card-shadow: none;

  /* ink */
  --ink:       #F3F5F9;
  --ink-2:     #C5CBE9;
  --ink-3:     #8B93B0;
  --muted:     #828898;
  --muted-2:   #828898;

  /* borders */
  --border:    #2A3148;
  --border-2:  #3A4568;
  --border-3:  #4A5578;

  /* accent */
  --accent:          #EE00EE;
  --accent-2:        #FF44FF;
  --accent-bright:   #EE00EE;
  --accent-surface:  rgba(238,0,238,0.12);
  --accent-on:       #FFFFFF;

  /* pass / fail */
  --pass:            #5EE695;
  --pass-surface:    rgba(94,230,149,0.14);
  --fail:            #FF8F8F;
  --fail-surface:    rgba(255,143,143,0.12);

  /* quality tiers dark */
  --tier-clean:    #5EE695;
  --tier-clean-s:  rgba(94,230,149,0.14);
  --tier-fixable:  #FBBF24;
  --tier-fixable-s:rgba(251,191,36,0.12);
  --tier-degraded: #FF8F8F;
  --tier-degraded-s:rgba(255,143,143,0.12);
  --tier-broken:   #828898;
  --tier-broken-s: rgba(130,136,152,0.12);

  /* difficulty dark */
  --nk-hard:    #89B5FF;
  --nk-vhard:   #FBBF24;
  --nk-expert:  #FF8F8F;

  /* focus ring */
  --focus-ring: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);
}

:root[data-theme="dark"] body {
  background:
    radial-gradient(ellipse 900px 520px at 20% -10%, rgba(137,181,255,0.05), transparent 60%),
    radial-gradient(ellipse 700px 420px at 120% 0%, rgba(205,176,255,0.04), transparent 60%),
    var(--bg);
}

body:has(.nk-portal):root[data-theme="dark"],
:root[data-theme="dark"] body:has(.nk-portal) {
  background:
    radial-gradient(ellipse 900px 520px at 20% -10%, rgba(137,181,255,0.05), transparent 60%),
    radial-gradient(ellipse 700px 420px at 120% 0%, rgba(205,176,255,0.04), transparent 60%),
    #0B0E14 !important;
}

/* Dark mode lightbox */
:root[data-theme="dark"] .lightbox {
  background: rgba(0, 0, 0, 0.85);
}

/* Dark outcome badges */
:root[data-theme="dark"] .outcome-pass {
  color: var(--accent);
  background: var(--accent-surface);
  border-color: var(--accent);
}
:root[data-theme="dark"] .outcome-fail {
  background: rgba(255,143,143,0.12);
  color: #FF8F8F;
  border-color: rgba(255,143,143,0.4);
}

/* Dark difficulty badges */
:root[data-theme="dark"] .diff-badge--level-1   { background: rgba(137,181,255,0.14); color: #89B5FF; border-color: rgba(137,181,255,0.4); }
:root[data-theme="dark"] .diff-badge--level-2   { background: rgba(251,191,36,0.12); color: #FBBF24; border-color: rgba(251,191,36,0.4); }
:root[data-theme="dark"] .diff-badge--level-3   { background: rgba(255,143,143,0.12); color: #FF8F8F; border-color: rgba(255,143,143,0.4); }

/* Dark dist badges */
:root[data-theme="dark"] .dist-badge--hard  { background: rgba(137,181,255,0.14); color: #89B5FF; border-color: rgba(137,181,255,0.4); }
:root[data-theme="dark"] .dist-badge--vhard { background: rgba(251,191,36,0.12); color: #FBBF24; border-color: rgba(251,191,36,0.4); }
:root[data-theme="dark"] .dist-badge--expert { background: rgba(255,143,143,0.12); color: #FF8F8F; border-color: rgba(255,143,143,0.4); }

/* Dark quality cards */
:root[data-theme="dark"] .quality-clean   { border-left-color: var(--tier-clean); }
:root[data-theme="dark"] .quality-fixable { border-left-color: var(--tier-fixable); }
:root[data-theme="dark"] .quality-degraded{ border-left-color: var(--tier-degraded); }
:root[data-theme="dark"] .quality-broken  { border-left-color: var(--tier-broken); }

/* Dark link buttons */
:root[data-theme="dark"] .link-btn {
  color: var(--ink-2);
  border-color: var(--border-2);
}
:root[data-theme="dark"] .link-btn:hover {
  background: var(--bg-3);
  color: var(--ink);
  border-color: var(--border-3);
}

/* ── OS fallback ─────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0B0E14;  --bg-2: #151A28;  --bg-3: #1E2436;  --surface: #192030;
    --card-shadow: none;
    --ink: #F3F5F9;  --ink-2: #C5CBE9;  --ink-3: #8B93B0;
    --muted: #828898;  --muted-2: #828898;
    --border: #2A3148;  --border-2: #3A4568;  --border-3: #4A5578;
    --accent: #EE00EE;  --accent-2: #FF44FF;  --accent-bright: #EE00EE;
    --accent-surface: rgba(238,0,238,0.12);  --accent-on: #FFFFFF;
    --pass: #5EE695;  --pass-surface: rgba(94,230,149,0.14);
    --fail: #FF8F8F;  --fail-surface: rgba(255,143,143,0.12);
    --tier-clean: #5EE695;  --tier-clean-s: rgba(94,230,149,0.14);
    --tier-fixable: #FBBF24;  --tier-fixable-s: rgba(251,191,36,0.12);
    --tier-degraded: #FF8F8F;  --tier-degraded-s: rgba(255,143,143,0.12);
    --tier-broken: #828898;  --tier-broken-s: rgba(130,136,152,0.12);
    --nk-hard: #89B5FF;  --nk-vhard: #FBBF24;  --nk-expert: #FF8F8F;
    --focus-ring: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);
    color-scheme: dark;
  }
  :root:not([data-theme]) body {
    background:
      radial-gradient(ellipse 900px 520px at 20% -10%, rgba(137,181,255,0.05), transparent 60%),
      radial-gradient(ellipse 700px 420px at 120% 0%, rgba(205,176,255,0.04), transparent 60%),
      var(--bg);
  }
  :root:not([data-theme]) .lightbox {
    background: rgba(0, 0, 0, 0.85);
  }
  :root:not([data-theme]) .theme-toggle .icon-sun  { display: block; }
  :root:not([data-theme]) .theme-toggle .icon-moon { display: none; }
}