/* ============================================================
   Akatsuki — editorial research page (light-first)
   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, aria-live DOM.
   ============================================================ */

:root {
  /* surfaces */
  --bg:        #F5F3F8;   /* page canvas — soft off-white */
  --bg-2:      #FFFFFF;   /* cards, panels, matrix wrap */
  --bg-3:      #EDE8F2;   /* hover / striped row / chart image bg */
  --surface:   #F0ECF5;

  /* ink — all ≥ 4.5:1 on --bg */
  --ink:       #0B0E14;   /* 17.3:1 — headings, wordmark, strong */
  --ink-2:     #2F3647;   /* 11.5:1 — body text */
  --ink-3:     #525A6E;   /*  7.0:1 — secondary labels */
  --muted:     #6A7286;   /*  4.8:1 — captions */
  --muted-2:   #8A90A0;   /*  3.5:1 — large-text-only */

  /* borders */
  --border:    #D5DAE2;   /* hairline on cards (decorative, ~1.5:1 on canvas) */
  --border-2:  #C8CDD8;   /* interactive resting border (3.1:1) */
  --border-3:  #8A90A0;   /* hover / focus (3.5:1) */

  /* 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;

  /* model semantic colors */
  --kimi:          #2A5CB8;
  --kimi-surface:  #E5EDFB;
  --nova:          #5C3FB3;
  --nova-surface:  #EEE4FB;

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

  /* diff tiers */
  --easy:      #6A7286;
  --medium:    #525A6E;
  --hard:      #5C3FB3;
  --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-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);
  font-size: var(--s-body);
  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-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; }

.prose a,
.phase-body a,
.section-desc a,
.teaser a,
.handoff a,
.caption a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--border-2);
  transition: text-decoration-color var(--dur-xfast) var(--ease-ui), color var(--dur-xfast) var(--ease-ui);
}
.prose a:hover,
.phase-body a:hover,
.section-desc a:hover,
.teaser a:hover,
.handoff a:hover,
.caption a:hover {
  text-decoration-color: var(--accent);
  color: var(--ink);
}
button { font: inherit; color: inherit; background: transparent; border: 0; cursor: pointer; padding: 0; }
code, .mono { font-family: var(--font-mono); font-size: 0.92em; }
b, strong { font-weight: 600; color: var(--ink); }
em { font-style: italic; color: var(--ink); }
::selection { background: var(--accent); color: var(--accent-on); }

/* ---------- a11y utilities ------------------------------ */
.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;
}
.skip-link {
  position: fixed;
  top: 8px; left: 8px;
  padding: 10px 14px;
  background: var(--accent);
  color: var(--accent-on);
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  font-weight: 500;
  z-index: 100;
  transform: translateY(-140%);
  transition: transform var(--dur-fast) var(--ease-ui);
}
.skip-link:focus { transform: translateY(0); outline: none; }

/* ---------- scroll progress rail ------------------------ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  z-index: 90;
  pointer-events: none;
  transform-origin: 0 0;
}

/* GLOBAL focus */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[role="tab"]:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 2px;
}

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;
}

/* ---------- 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; }
}

/* ---------- MASTHEAD ------------------------------------ */
.masthead { margin-bottom: 72px; }
.mast-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.wordmark {
  font-family: var(--font-display);
  font-size: var(--s-wordmark);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--ink);
}
.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);
  border-radius: 999px;
  white-space: nowrap;
}
.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;
}
.thesis-word {
  display: inline-block;
  overflow: hidden;
  vertical-align: baseline;
  line-height: inherit;
  padding: 0.1em 0.08em 0.25em;
  margin: -0.1em -0.08em -0.25em;
}
.thesis-word-inner {
  display: inline-block;
  will-change: transform, opacity;
}
.thesis-em {
  color: var(--accent);
  font-style: italic;
}
.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); }
.byline a:hover { color: var(--ink); border-color: var(--ink-3); }

/* ---------- section shell ------------------------------- */
.section { margin-bottom: var(--gap-section); scroll-margin-top: 32px; }
.section:last-of-type { margin-bottom: 0; }
.section-label {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: var(--hairline);
}
.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); }

/* ---------- §01 prose + glance sidebar ------------------ */
.overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  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: 17px;
  line-height: 1.65;
  color: var(--ink-2);
}
.prose p + p { margin-top: 1em; }
.teaser {
  margin-top: 24px !important;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: 0.04em;
  color: var(--ink-3);
}
.teaser a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}
.teaser a:hover { background: color-mix(in oklab, var(--accent) 16%, transparent); }

.glance {
  border: var(--hairline);
  background: var(--bg-2);
  padding: 22px 22px 20px;
  position: relative;
  box-shadow: var(--card-shadow);
}
.glance::before {
  content: "";
  position: absolute;
  top: 0; left: 0; width: 3px; height: 100%;
  background: var(--accent);
}
.glance-label {
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: var(--hairline);
}
.glance-list { display: grid; gap: 10px; margin: 0; }
.glance-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-mono);
}
.glance-row dt {
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.glance-row dd {
  margin: 0;
  font-size: 13px;
  color: var(--ink-2);
  text-align: right;
}
.glance-row dd b {
  color: var(--accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.glance-foot {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- §03 PIPELINE -------------------------------- */
.section-pipeline {
  position: relative;
}
.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 {
  max-width: 800px;
  margin-bottom: 44px;
}
.pipeline-eyebrow {
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.pipeline-title {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.2;
  letter-spacing: var(--ls-tight);
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 14px;
}
.pipeline-sub {
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 640px;
}

.phase-tier-header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 32px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border);
}
.phase-tier-header:first-of-type { margin-top: 0; }
.tier-n {
  font-size: var(--s-ui);
  color: var(--accent);
  letter-spacing: var(--ls-wide);
  width: 20px;
}
.tier-exec .tier-n { color: var(--accent); }
.tier-t {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.tier-hint {
  margin-left: auto;
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}

.pipeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: var(--hairline);
  margin-bottom: 32px;
  background: var(--bg);
  position: relative;
}
.pipeline-a { border-top: 2px solid var(--border-2); }
.pipeline-b { border-top: 2px solid var(--accent); }

.phase {
  padding: 26px 22px 28px;
  border-right: var(--hairline);
  background: var(--bg);
  position: relative;
  transition: background var(--dur-fast) var(--ease-ui), border-color var(--dur-fast) var(--ease-ui);
}
.phase:last-child { border-right: 0; }
.phase:hover {
  background: color-mix(in oklab, var(--accent) 8%, transparent);
}
.phase-exec { background: color-mix(in oklab, var(--accent) 6%, transparent); }
.phase-exec:hover { background: color-mix(in oklab, var(--accent) 14%, transparent); }

.phase:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 38px;
  right: -5px;
  width: 9px;
  height: 9px;
  background: var(--bg);
  border: 1px solid var(--border-2);
  transform: rotate(45deg);
  z-index: 2;
}
.phase-exec:not(:last-child)::after {
  border-color: var(--accent);
}

@media (max-width: 900px) {
  .phase:not(:last-child)::after { display: none; }
}

@media (max-width: 900px) {
  .pipeline { grid-template-columns: 1fr; }
  .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 {
  display: grid;
  gap: 8px;
  font-size: var(--s-small);
  color: var(--ink-2);
  line-height: 1.55;
}
.phase-body li {
  padding-left: 14px;
  position: relative;
}
.phase-body li::before {
  content: "·";
  position: absolute; left: 0; top: -2px;
  font-family: var(--font-mono);
  color: var(--muted);
}

.handoff {
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: 0.04em;
  color: var(--ink-3);
  text-align: right;
}
.handoff a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}
.handoff a:hover { background: color-mix(in oklab, var(--accent) 16%, transparent); }

/* ---------- §04 REVEAL ---------------------------------- */
.section-reveal {
  padding-top: 8px;
}
.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);
  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);
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.reveal-kicker {
  color: var(--ink-2);
}
.reveal-kicker b { color: var(--ink); }
.reveal-cost {
  margin-top: 22px !important;
  font-size: var(--s-small);
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.reveal-cost b { color: var(--ink); font-weight: 500; }

/* charts */
.charts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.charts-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
@media (max-width: 1080px) {
  .charts-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .charts-3 .chart--hero { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .charts, .charts-3 { grid-template-columns: 1fr; gap: 16px; }
  .charts-3 .chart--hero { grid-column: auto; }
}
.chart {
  margin: 0;
  border: var(--hairline);
  background: var(--bg-2);
  padding: 14px;
  box-shadow: var(--card-shadow);
  min-width: 0;
}
.chart img {
  width: 100%;
  height: auto;
  display: block;
  background: var(--bg-2);
  min-height: 180px;
  object-fit: contain;
  border: 1px solid var(--border);
}
.chart--hero img {
  max-height: 280px;
}
.chart figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.caption {
  max-width: var(--max-prose);
  font-size: var(--s-small);
  color: var(--ink-2);
  line-height: 1.6;
}
.caption b { color: var(--ink); }
.caption a { color: var(--accent); border-bottom: 1px solid var(--border-2); }
.caption a:hover { border-color: var(--accent); }
.tok-kimi { color: var(--kimi); font-weight: 500; }
.tok-nova { color: var(--nova); font-weight: 500; }

/* ---------- §05 KPI cards ------------------------------- */
.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(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 24px rgba(15,20,35,0.12), 0 2px 6px rgba(15,20,35,0.08);
  transform: translateY(-2px);
}
.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-value {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 4px;
}
.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-big small {
  font-size: 0.55em;
  font-weight: 500;
  color: var(--ink-2);
  margin-left: 1px;
}
.kpi-card--accent .kpi-big { color: var(--accent); }
.kpi-suffix {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  color: var(--ink-3);
  letter-spacing: 0.06em;
}
.kpi-sub {
  margin-top: auto;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- §05 INSTANCES / DATASET VIEWER -------------- */
.view-toggle {
  display: inline-flex;
  gap: 0;
  border: var(--hairline);
  margin-bottom: 24px;
  background: var(--bg-2);
}
.vt-btn {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: 0.04em;
  padding: 10px 18px;
  color: var(--ink-2);
  border-right: var(--hairline);
  transition: background var(--dur-xfast) var(--ease-ui), color var(--dur-xfast) var(--ease-ui);
  min-height: 44px;
}
.vt-btn:last-child { border-right: 0; }
.vt-btn:hover { color: var(--ink); background: var(--bg-3); }
.vt-btn.is-active {
  background: var(--accent);
  color: var(--accent-on);
}
.view-pane { outline: none; }
.view-pane[hidden] { display: none !important; }

/* DATASET VIEWER CONTROLS -------------------------------- */
.viewer-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding: 16px 20px;
  border: var(--hairline);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
}
.viewer-search {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 200px;
  border: 1px solid var(--border-2);
  background: var(--bg);
  padding: 0 12px;
  transition: border-color var(--dur-xfast) var(--ease-ui);
}
.viewer-search:focus-within {
  border-color: var(--accent);
}
.viewer-search svg {
  width: 16px;
  height: 16px;
  color: var(--ink-3);
  flex-shrink: 0;
}
.viewer-search input {
  border: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  color: var(--ink);
  padding: 10px 0;
  width: 100%;
  outline: none;
}
.viewer-search input::placeholder {
  color: var(--muted);
}
.viewer-filters {
  display: flex;
  gap: 10px;
}
.viewer-filters select {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  color: var(--ink-2);
  background: var(--bg);
  border: 1px solid var(--border-2);
  padding: 8px 12px;
  cursor: pointer;
  transition: border-color var(--dur-xfast) var(--ease-ui);
  appearance: none;
  -webkit-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 fill='%23525A6E' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}
.viewer-filters select:focus {
  outline: none;
  border-color: var(--accent);
}
.viewer-meta {
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  color: var(--ink-3);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  white-space: nowrap;
}

/* VIEWER TABLE ------------------------------------------- */
.viewer-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: var(--s-mono);
  table-layout: fixed;
}
.viewer-table th,
.viewer-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  text-align: left;
}
.viewer-table thead th {
  font-weight: 500;
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  background: var(--bg-3);
  border-bottom: 1px solid var(--border-2);
}
.th-instance { width: auto; }
.th-diff { width: 120px; text-align: center !important; }
.th-expand { width: 44px; text-align: center !important; }

.viewer-table tbody tr {
  cursor: pointer;
  transition: background var(--dur-xfast) var(--ease-ui);
}
.viewer-table tbody tr:hover {
  background: var(--bg-3);
}
.viewer-table tbody td {
  color: var(--ink-2);
  font-size: 13px;
}

/* VIEWER PAGINATION -------------------------------------- */
.viewer-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
}
.viewer-pagination button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border-2);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  transition: background var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui), color var(--dur-xfast) var(--ease-ui);
}
.viewer-pagination button:hover {
  border-color: var(--border-3);
  color: var(--ink);
  background: var(--bg-3);
}
.viewer-pagination button.is-active {
  background: var(--accent);
  color: var(--accent-on);
  border-color: var(--accent);
}
.viewer-pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* MATRIX ------------------------------------------------- */
.matrix-wrap {
  border: var(--hairline);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
  overflow-x: auto;
}
.matrix {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: var(--s-mono);
  table-layout: fixed;
}
.matrix th, .matrix td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.matrix td:last-child {
  overflow: visible;
  text-overflow: clip;
}
.matrix thead th {
  font-weight: 500;
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  background: var(--bg-3);
  border-bottom: 1px solid var(--border-2);
}
.matrix-th-id { width: auto; }
.matrix-th-meta { width: 100px; text-align: center !important; }
.matrix-th-cell { width: 112px; text-align: center !important; }
.matrix-th-expand { width: 44px; text-align: center !important; }

.matrix-row { cursor: pointer; transition: background var(--dur-xfast) var(--ease-ui); }
.matrix-row:hover { background: var(--bg-3); }
.matrix-row.is-expanded,
.matrix-row.is-expanded:hover {
  background: color-mix(in oklab, var(--accent-bright) 18%, var(--bg-2));
}
.matrix-row td.matrix-cell { text-align: center; padding: 8px 14px; }
.matrix-row td.matrix-expand { text-align: center; padding: 8px 12px; }

.matrix-expand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--ink-3);
  transition: transform var(--dur-fast) var(--ease-out), color var(--dur-xfast) var(--ease-ui);
}
.matrix-expand-icon svg { width: 14px; height: 14px; }
.matrix-row.is-expanded .matrix-expand-icon {
  transform: rotate(90deg);
  color: var(--accent);
}

.matrix-detail-row td {
  padding: 0;
  border-top: 0;
  background: color-mix(in oklab, var(--accent-bright) 18%, var(--bg-2));
}
.matrix-detail-content {
  padding: 20px 24px;
  animation: matrix-slide-down var(--dur-fast) var(--ease-out);
}
@keyframes matrix-slide-down {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.matrix-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 900px) {
  .matrix-detail-grid { grid-template-columns: 1fr; }
}
.matrix-detail-block {
  background: var(--bg-2);
  border: var(--hairline);
  padding: 16px;
}
.matrix-detail-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
}
.matrix-detail-title.tok-kimi { color: var(--kimi); }
.matrix-detail-title.tok-nova { color: var(--nova); }
.matrix-detail-item {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 5px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  border-bottom: 1px solid var(--border);
}
.matrix-detail-item:last-child { border-bottom: 0; }
.matrix-detail-item--stack {
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}
.matrix-detail-key {
  color: var(--ink-3);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.matrix-detail-val {
  font-weight: 500;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  text-align: right;
  word-break: break-all;
}
.matrix-detail-item--stack .matrix-detail-val {
  text-align: left;
  font-weight: 400;
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-2);
}
.matrix-detail-val a {
  color: var(--accent);
  border-bottom: 1px solid var(--border-2);
}
.matrix-detail-val a:hover { border-color: var(--accent); }
.matrix-detail-docker {
  display: inline-block;
  font-size: 11px;
  color: var(--ink-2);
  background: var(--bg-3);
  padding: 3px 6px;
  border: 1px solid var(--border);
  max-width: 100%;
  word-break: break-all;
}
.matrix-detail-copy {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  background: transparent;
  border: 1px solid var(--border-2);
  cursor: pointer;
  transition: color var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui), background var(--dur-xfast) var(--ease-ui);
}
.matrix-detail-copy:hover { color: var(--accent); border-color: var(--accent); }
.matrix-detail-copy.is-copied { color: var(--pass); border-color: var(--pass); background: var(--pass-surface); }
.matrix-row td.matrix-id {
  color: var(--ink);
  font-size: 13px;
}
.matrix-row td.matrix-id .num {
  color: var(--ink-3);
  margin-right: 10px;
}
.matrix-row td.matrix-id a {
  color: var(--ink);
  border-bottom: 1px solid transparent;
}
.matrix-row td.matrix-id a:hover {
  border-color: var(--border-2);
}
.matrix-row td.matrix-meta {
  text-align: center;
  color: var(--ink-3);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  padding: 12px 12px;
}

.matrix-row.row-p5 {
  background: color-mix(in oklab, var(--accent-bright) 30%, transparent);
}

.tile-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 28px;
  border: 1px solid var(--border-2);
  background: transparent;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui), color var(--dur-xfast) var(--ease-ui), transform var(--dur-xfast) var(--ease-ui);
  min-height: 44px;
  min-width: 72px;
}
.tile-btn:hover { border-color: var(--border-3); color: var(--ink-2); }
.tile-btn--pass {
  background: var(--accent-bright);
  color: var(--accent-on);
  border-color: var(--accent-bright);
  font-weight: 600;
}
.tile-btn--pass:hover {
  background: color-mix(in oklab, var(--accent-bright) 82%, black);
  border-color: color-mix(in oklab, var(--accent-bright) 82%, black);
  color: var(--accent-on);
}
.tile-btn--fail {
  background: var(--fail-surface);
  color: var(--fail);
  border-color: color-mix(in oklab, var(--fail) 40%, transparent);
  font-weight: 600;
}
.tile-btn--fail:hover {
  background: color-mix(in oklab, var(--fail-surface) 82%, var(--fail));
  border-color: var(--fail);
  color: var(--fail);
}

/* totals row */
.matrix-totals td {
  background: var(--bg-3);
  border-top: 1px solid var(--border-2);
  border-bottom: 0;
  padding-top: 16px;
  padding-bottom: 16px;
}
.matrix-totals-label {
  text-align: right;
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.total-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 72px;
  height: 32px;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  font-weight: 600;
  border: 1px solid currentColor;
  letter-spacing: 0.04em;
}
.total-chip--kimi { color: var(--kimi); }
.total-chip--nova { color: var(--nova); }

.matrix-hint {
  margin-top: 14px;
  font-size: var(--s-ui);
  letter-spacing: 0.06em;
  color: var(--ink-3);
}

/* REPO DRILL-DOWN --------------------------------------- */
.repo-list {
  border: var(--hairline);
  background: var(--bg-2);
  box-shadow: var(--card-shadow);
}
.repo-group {
  border-bottom: var(--hairline);
}
.repo-group:last-child { border-bottom: 0; }
.repo-head {
  display: grid;
  grid-template-columns: 24px 1fr 70px 80px 80px;
  gap: 14px;
  align-items: center;
  padding: 16px 20px;
  width: 100%;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--s-mono);
  color: var(--ink-2);
  background: transparent;
  border: 0;
  cursor: pointer;
  min-height: 56px;
  transition: background var(--dur-xfast) var(--ease-ui);
}
.repo-head:hover { background: var(--bg-3); }
.repo-head[aria-expanded="true"] { background: var(--bg-3); border-bottom: 1px solid var(--border); }
.repo-caret {
  font-family: var(--font-mono);
  color: var(--ink-3);
  transition: transform var(--dur-fast) var(--ease-out);
  display: inline-block;
}
.repo-head[aria-expanded="true"] .repo-caret { transform: rotate(90deg); color: var(--accent); }
.repo-name {
  color: var(--ink);
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.repo-lang {
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.repo-score {
  text-align: center;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
}
.repo-score.score-kimi b,
.repo-score.score-nova b { font-weight: 600; }
.repo-score.has-pass { color: var(--accent); }
.repo-score.score-kimi.has-pass { color: var(--accent); }
.repo-score.score-nova.has-pass { color: var(--accent); }

@media (max-width: 640px) {
  .repo-head {
    grid-template-columns: 24px 1fr auto;
  }
  .repo-head .repo-lang { display: none; }
  .repo-head .repo-score { font-size: 11px; }
}

.repo-children {
  padding: 10px 20px 20px 58px;
  background: var(--bg-3);
  display: grid;
  gap: 10px;
}
.repo-children[hidden] { display: none; }

.run-card {
  border: 1px solid var(--border);
  padding: 12px 14px;
  background: var(--bg-2);
  display: grid;
  grid-template-columns: 1fr repeat(2, minmax(120px, 200px));
  gap: 16px;
  align-items: center;
}
.run-card--p5 { border-color: var(--accent-2); }

.run-inst {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
}
.run-inst .run-id {
  display: block;
  color: var(--ink-2);
}
.run-inst .run-diff {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 2px;
}

.run-model {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 10px;
}
.run-model-head {
  grid-column: 1 / -1;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}
.run-model--kimi .run-model-head { color: var(--kimi); }
.run-model--nova .run-model-head { color: var(--nova); }
.run-stat { color: var(--ink-3); font-size: 11px; letter-spacing: 0.04em; }
.run-val { color: var(--ink); font-variant-numeric: tabular-nums; font-size: 12px; }
.run-pass {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 8px;
  border: 1px solid currentColor;
}
.run-pass--pass { color: var(--accent); background: var(--accent-surface); }
.run-pass--fail { color: var(--fail); background: var(--fail-surface); }

@media (max-width: 760px) {
  .run-card { grid-template-columns: 1fr; }
}

/* ---------- §06 RESOURCES ------------------------------- */
.resources {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
@media (max-width: 900px) {
  .resources { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .resources { grid-template-columns: 1fr; }
}
.resource {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 22px 20px;
  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),
    background var(--dur-fast) var(--ease-ui),
    box-shadow var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}
.resource:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(15,20,35,0.08), 0 1px 2px rgba(15,20,35,0.05);
  transform: translateY(-1px);
}
.resource:hover .res-arrow { color: var(--accent); transform: translateX(4px); }
.res-label {
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.res-title {
  font-family: var(--font-display);
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: var(--ls-tight);
  color: var(--ink);
  padding-right: 28px;
}
.res-url {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.res-arrow {
  position: absolute;
  top: 22px;
  right: 20px;
  font-size: 18px;
  color: var(--ink-3);
  transition: color var(--dur-fast) var(--ease-ui), transform var(--dur-fast) var(--ease-out);
}

/* ---------- footer -------------------------------------- */
.foot {
  margin-top: var(--gap-section);
  padding-top: 26px;
  border-top: var(--hairline);
}
.foot-inner {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
}
.foot-inner a {
  color: var(--ink-2);
  border-bottom: 1px solid var(--border-2);
  transition: color var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui);
}
.foot-inner a:hover {
  color: var(--ink);
  border-color: var(--accent);
}

/* ---------- DETAIL ROW (expandable) --------------------- */
.detail-row td {
  padding: 0;
  border-top: 0;
  background: color-mix(in oklab, var(--accent-bright) 10%, var(--bg-2));
}
.detail-content {
  padding: 24px 28px;
  animation: matrix-slide-down var(--dur-fast) var(--ease-out);
}
.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) {
  .detail-grid { grid-template-columns: 1fr; }
}
.detail-block {
  background: var(--bg-2);
  border: var(--hairline);
  padding: 16px;
}
.detail-block-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
}
.detail-block-title.tok-kimi { color: var(--kimi); }
.detail-block-title.tok-nova { color: var(--nova); }
.detail-row-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  padding: 5px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  border-bottom: 1px solid var(--border);
}
.detail-row-item:last-child { border-bottom: 0; }
.detail-key {
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  white-space: nowrap;
}
.detail-val {
  font-weight: 500;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  text-align: right;
  word-break: break-all;
}

/* expand icon */
.expand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  transition: transform var(--dur-fast) var(--ease-out);
}
.expand-icon svg { width: 14px; height: 14px; color: var(--ink-3); }
.matrix-row.row-expanded .expand-icon { transform: rotate(90deg); }
.matrix-row.row-expanded .expand-icon svg { color: var(--accent); }
.matrix-row.row-expanded { background: color-mix(in oklab, var(--accent-bright) 12%, var(--bg-2)); }

/* ============================================================
   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;
  }
}

/* ============================================================
   DARK MODE
   ============================================================ */
: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;

  --card-shadow: none;

  /* ink */
  --ink:       #F3F5F9;
  --ink-2:     #C5CBE9;
  --ink-3:     #8B93B0;
  --muted:     #7A82A0;
  --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;

  /* model semantic colors */
  --kimi:            #89B5FF;
  --kimi-surface:    rgba(137,181,255,0.14);
  --nova:            #CDB0FF;
  --nova-surface:    rgba(205,176,255,0.14);

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

  /* diff tiers */
  --easy:      #A1A7B6;
  --medium:    #DDE3EE;
  --hard:      #CDB0FF;
  --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);
}

:root[data-theme="dark"] .run-pass--pass {
  color: var(--accent);
  background: var(--accent-surface);
}

:root[data-theme="dark"] .viewer-search {
  background: var(--bg-2);
}
:root[data-theme="dark"] .viewer-filters select {
  background: var(--bg-2);
  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 fill='%238B93B0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

/* 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: #7A82A0;  --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;
    --kimi: #89B5FF;  --kimi-surface: rgba(137,181,255,0.14);
    --nova: #CDB0FF;  --nova-surface: rgba(205,176,255,0.14);
    --pass: #5EE695;  --pass-surface: rgba(94,230,149,0.14);
    --fail: #FF8F8F;  --fail-surface: rgba(255,143,143,0.12);
    --easy: #A1A7B6;  --medium: #DDE3EE;  --hard: #CDB0FF;  --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]) .run-pass--pass {
    color: var(--accent);
    background: var(--accent-surface);
  }
  :root:not([data-theme]) .viewer-search {
    background: var(--bg-2);
  }
  :root:not([data-theme]) .viewer-filters select {
    background: var(--bg-2);
    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 fill='%238B93B0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
  }
}

/* ============================================================
   CHART LIGHT/DARK IMAGE SWAP
   ============================================================ */
.chart img.chart-dark { display: none; }
.chart img.chart-light { display: block; }
:root[data-theme="dark"] .chart img.chart-dark { display: block; }
:root[data-theme="dark"] .chart img.chart-light { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .chart img.chart-dark { display: block; }
  :root:not([data-theme]) .chart img.chart-light { display: none; }
}

/* ============================================================
   THEME TOGGLE BUTTON
   ============================================================ */
.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);
}
.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 (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-sun  { display: block; }
  :root:not([data-theme]) .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; }
}

/* ============================================================
   CHART TRIGGER + LIGHTBOX
   ============================================================ */
.chart-trigger {
  display: block;
  width: 100%;
  padding: 0;
  margin: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}
.chart-trigger img {
  transition: transform var(--dur-fast) var(--ease-out);
}
.chart-trigger:hover img,
.chart-trigger:focus-visible img {
  transform: scale(1.015);
}
.chart-zoom-hint {
  position: absolute;
  left: 50%;
  bottom: 10px;
  transform: translate(-50%, 6px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--ink);
  background: color-mix(in oklab, var(--bg-2) 92%, transparent);
  padding: 5px 10px;
  border: 1px solid var(--border-2);
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-xfast) var(--ease-ui), transform var(--dur-xfast) var(--ease-ui);
}
.chart-trigger:hover .chart-zoom-hint,
.chart-trigger:focus-visible .chart-zoom-hint {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* Overlay */
.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);
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-out);
}
.lightbox[data-open="true"] { opacity: 1; }
.lightbox[hidden] { display: none; }
:root[data-theme="dark"] .lightbox {
  background: rgba(0, 0, 0, 0.85);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .lightbox { background: rgba(0, 0, 0, 0.85); }
}

.lightbox-figure {
  margin: 0;
  max-width: min(1200px, 92vw);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}
.lightbox-figure img {
  display: block;
  width: auto;
  height: auto;
  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-caption {
  color: #F3F5F9;
  font-size: var(--s-ui);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  line-height: 1;
  color: #F3F5F9;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--dur-xfast) var(--ease-ui), border-color var(--dur-xfast) var(--ease-ui), transform var(--dur-xfast) var(--ease-ui);
}
.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.5);
}
.lightbox-close:active { transform: scale(0.95); }

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