/* FinanceGym site — one stylesheet, no dependencies.
   Color roles come from the validated reference palette; the only chart hue is
   the single sequential blue used by the Overall score bar. Category identity is
   carried by text chips + faceted panels, never by hue alone. */

:root {
  color-scheme: light;

  --plane:          #f9f9f7;
  --surface-1:      #fcfcfb;
  --surface-2:      #f2f1ed;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --border:         rgba(11, 11, 11, 0.10);
  --grid:           #e1e0d9;
  --baseline:       #c3c2b7;

  --accent:         #2a78d6;
  --accent-weak:    #cde2fb;
  --accent-ink:     #184f95;

  --good:           #0ca30c;
  --good-ink:       #006300;
  --critical:       #d03b3b;

  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius: 10px;
  --measure: 68ch;
  --wrap: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --plane:          #0d0d0d;
    --surface-1:      #1a1a19;
    --surface-2:      #232322;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --border:         rgba(255, 255, 255, 0.10);
    --grid:           #2c2c2a;
    --baseline:       #383835;
    --accent:         #3987e5;
    --accent-weak:    #184f95;
    --accent-ink:     #86b6ef;
    --good:           #0ca30c;
    --good-ink:       #0ca30c;
    --critical:       #e34948;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --plane:          #0d0d0d;
  --surface-1:      #1a1a19;
  --surface-2:      #232322;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted:     #898781;
  --border:         rgba(255, 255, 255, 0.10);
  --grid:           #2c2c2a;
  --baseline:       #383835;
  --accent:         #3987e5;
  --accent-weak:    #184f95;
  --accent-ink:     #86b6ef;
  --good:           #0ca30c;
  --good-ink:       #0ca30c;
  --critical:       #e34948;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }

body {
  margin: 0;
  background: var(--plane);
  color: var(--text-primary);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5rem; letter-spacing: -0.015em; }
h1 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3rem); }
h2 { font-size: clamp(1.35rem, 1.1rem + 1vw, 1.75rem); margin-top: 0; }
h3 { font-size: 1.05rem; }
h4 { font-size: .95rem; margin-top: 1.75rem; }
p  { margin: 0 0 1rem; }

code, kbd, pre { font-family: var(--mono); font-size: .875em; }
code { background: var(--surface-2); padding: .12em .38em; border-radius: 5px; }
pre {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1rem;
  line-height: 1.55;
}
pre code { background: none; padding: 0; }

/* --- layout ---------------------------------------------------------- */

.wrap { width: min(var(--wrap), 100% - 2.5rem); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--plane) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 1rem;
  min-height: 3.75rem; flex-wrap: wrap;
}
.brand {
  font-weight: 650; letter-spacing: -0.02em; font-size: 1.05rem;
  color: var(--text-primary); text-decoration: none; margin-right: auto;
  display: inline-flex; align-items: center; gap: .5rem;
}
.brand .dot {
  width: .55rem; height: .55rem; border-radius: 50%;
  background: var(--accent); flex: none;
}
.nav { display: flex; align-items: center; gap: .25rem; flex-wrap: wrap; }
.nav a {
  color: var(--text-secondary); text-decoration: none;
  padding: .35rem .6rem; border-radius: 7px; font-size: .9rem; font-weight: 500;
}
.nav a:hover { background: var(--surface-2); color: var(--text-primary); }
.nav a[aria-current] { color: var(--text-primary); background: var(--surface-2); }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 2rem; height: 2rem; padding: 0;
  background: transparent; color: var(--text-secondary);
  border: 1px solid var(--border); border-radius: 7px; cursor: pointer;
  font-size: .9rem; line-height: 1;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text-primary); }

main { padding: 2.5rem 0 4rem; }
section { margin-bottom: 3rem; }

/* One long page, so each section announces itself with a rule above it. (Jump
   links clear the sticky header via scroll-padding-top on <html>.) */
main section + section {
  border-top: 1px solid var(--border);
  padding-top: 2.75rem;
}
.hero + section { border-top: 0; padding-top: 0; }
.lede { color: var(--text-secondary); font-size: 1.05rem; max-width: var(--measure); }
.prose { max-width: var(--measure); }
.prose ul, .prose ol { padding-left: 1.25rem; margin: 0 0 1rem; }
.prose li { margin-bottom: .35rem; }

/* --- hero + stat tiles ------------------------------------------------ */

.hero { padding: 1rem 0 2.25rem; border-bottom: 1px solid var(--border); margin-bottom: 2.5rem; }
.hero h1 { max-width: 22ch; }
.eyebrow {
  font-size: .75rem; font-weight: 650; letter-spacing: .09em;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: .75rem;
}
.cta-row { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.5rem; }
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .55rem 1rem; border-radius: 8px;
  font-size: .9rem; font-weight: 550; text-decoration: none;
  border: 1px solid var(--border); background: var(--surface-1); color: var(--text-primary);
}
.btn:hover { background: var(--surface-2); color: var(--text-primary); }
.btn-primary { background: var(--accent); border-color: transparent; color: #fff; }
.btn-primary:hover { background: var(--accent-ink); color: #fff; }

/* Leading icons in the hero CTAs. They inherit the label's colour via
   currentColor, so one rule covers both themes and the hover state. .btn is
   already an inline-flex row with a gap, so no extra spacing is needed. */
.btn-ico {
  width: 1.05em; height: 1.05em; flex: none;
  transform: translateY(0.5px);
}

.stats {
  display: grid; gap: 1px; margin-top: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
}
.stat { background: var(--surface-1); padding: 1rem 1.1rem; }
.stat .value { font-size: 1.6rem; font-weight: 620; letter-spacing: -0.02em; display: block; }
.stat .label { font-size: .8rem; color: var(--text-secondary); }

/* --- cards ------------------------------------------------------------ */

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
}
.card h3 { margin-bottom: .35rem; }
.card p:last-child { margin-bottom: 0; }
.card-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--surface-1);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin: 0 0 1.5rem;
}
.callout.is-critical { border-left-color: var(--critical); }
.callout.is-good { border-left-color: var(--good); }
/* Callout headings sit at whatever level their nesting requires (h4 inside a
   numbered step, h3 at section level) — style both. */
.callout h3, .callout h4 { display: flex; align-items: center; gap: .5rem;
  font-size: 1.05rem; margin-top: 0; }
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }
.callout .mark { font-size: 1rem; line-height: 1; }
.callout.is-critical .mark { color: var(--critical); }
.callout.is-good .mark { color: var(--good-ink); }

/* --- chips + badges --------------------------------------------------- */

.chip {
  display: inline-block; white-space: nowrap;
  padding: .12rem .5rem; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface-2);
  color: var(--text-secondary); font-size: .75rem; font-weight: 550;
}

/* --- controls --------------------------------------------------------- */

.controls {
  display: flex; flex-wrap: wrap; gap: .6rem; align-items: center;
  margin-bottom: 1rem;
}
.controls label { font-size: .8rem; color: var(--text-secondary); }
input[type="search"], select {
  font: inherit; font-size: .9rem;
  padding: .45rem .65rem;
  color: var(--text-primary); background: var(--surface-1);
  border: 1px solid var(--border); border-radius: 8px;
}
input[type="search"] { min-width: min(320px, 100%); }
input[type="search"]:focus-visible, select:focus-visible, .icon-btn:focus-visible,
a:focus-visible, button:focus-visible, th button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.result-count { font-size: .85rem; color: var(--text-secondary); margin-left: auto; }
/* Sole occupant of .controls now that the category facet is gone — sit left. */
.controls > .result-count:only-child { margin-left: 0; }

/* --- tables ----------------------------------------------------------- */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-1);
}
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
caption { text-align: left; padding: .9rem 1rem .35rem; color: var(--text-secondary); font-size: .85rem; }
th, td { padding: .6rem .85rem; text-align: left; vertical-align: top; }
thead th {
  position: sticky; top: 0; z-index: 1;
  background: var(--surface-1);
  border-bottom: 1px solid var(--baseline);
  font-size: .78rem; font-weight: 620; letter-spacing: .03em;
  text-transform: uppercase; color: var(--text-muted); white-space: nowrap;
}
tbody tr + tr td { border-top: 1px solid var(--grid); }
tbody tr:hover td { background: var(--surface-2); }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.rank { color: var(--text-muted); font-variant-numeric: tabular-nums; width: 3rem; }
.system { font-weight: 550; white-space: nowrap; }
/* FinanceHarness is named in the page's emphasis blue wherever it appears in a
   system name. This carries identity in place of the removed "ours" badge. */
.system .fh { color: #1a6fd4; font-weight: 640; }
th button {
  font: inherit; letter-spacing: inherit; text-transform: inherit; color: inherit;
  background: none; border: 0; padding: 0; cursor: pointer;
  display: inline-flex; align-items: center; gap: .25rem;
}
th button:hover { color: var(--text-primary); }
th .sort-mark { color: var(--accent); font-size: .7rem; }

/* Overall score bar — single sequential hue, thin mark, rounded data-end,
   anchored to a shared baseline; the value label stays in ink. */
.score-cell { display: flex; align-items: center; gap: .6rem; justify-content: flex-end; }
.score-cell .value { font-variant-numeric: tabular-nums; font-weight: 600; min-width: 2.6rem; text-align: right; }
.bar-track {
  position: relative; flex: none;
  width: 96px; height: 8px; border-radius: 4px;
  background: var(--grid);
}
.bar-fill {
  position: absolute; inset-block: 0; left: 0;
  border-radius: 4px; background: var(--accent);
}
/* --- copy-to-clipboard button ----------------------------------------- */

.copy-btn {
  font: inherit; font-size: .72rem; font-weight: 600;
  padding: .18rem .45rem; border-radius: 6px; cursor: pointer;
  background: var(--surface-1); color: var(--text-secondary);
  border: 1px solid var(--border);
}
.copy-btn:hover { color: var(--text-primary); background: var(--surface-2); }

/* --- field spec list -------------------------------------------------- */

.req { color: var(--good-ink); font-weight: 650; }
.opt { color: var(--text-muted); }

.footnote { font-size: .85rem; color: var(--text-secondary); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* --- numbered steps --------------------------------------------------- */

.steps { list-style: none; counter-reset: step; padding: 0; margin: 0; }
.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.75rem 3rem;
  border-left: 1px solid var(--grid);
  margin-left: 1rem;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
  content: counter(step);
  position: absolute; left: -1rem; top: -.15rem;
  width: 2rem; height: 2rem; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--surface-1); border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: .85rem; font-weight: 650; font-variant-numeric: tabular-nums;
}
.steps h3 { margin-top: 0; }
.steps > li > :last-child { margin-bottom: 0; }

.code-block { position: relative; }
.code-block .copy-btn { position: absolute; top: .55rem; right: .55rem; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem 0 2.5rem;
  color: var(--text-secondary); font-size: .85rem;
}
.site-footer .wrap { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: space-between; }

.skip-link {
  position: absolute; left: -9999px;
  background: var(--surface-1); color: var(--text-primary);
  padding: .5rem .8rem; border-radius: 8px; border: 1px solid var(--border);
}
.skip-link:focus { left: 1rem; top: .5rem; z-index: 50; }

@media (max-width: 640px) {
  .result-count { margin-left: 0; width: 100%; }
  .bar-track { width: 56px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* --- cost–quality frontier -------------------------------------------- */

/* Categorical slots for the scatter. Both modes are selected, not flipped:
   each is the same four hues re-stepped for its surface and validated against
   it (lightness band, chroma floor, CVD separation, contrast). */
:root {
  --s1: #2a78d6;  /* FinanceHarness */
  --s2: #eb6834;  /* ReAct */
  --s3: #1baf7a;  /* agentic scaffold */
  --s4: #eda100;  /* fine-tuned open-weight */
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
  }
}
:root[data-theme="dark"] {
  --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500;
}

.pareto-wrap { margin-top: 1.25rem; }
.pareto-svg { width: 100%; height: auto; display: block; overflow: visible; }

.pareto-svg .grid { stroke: var(--grid); stroke-width: 1; }
.pareto-svg .grid-v { stroke-dasharray: 2 4; }
.pareto-svg .axis { stroke: var(--baseline); stroke-width: 1; }
.pareto-svg .tick { fill: var(--text-muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.pareto-svg .tick-y { text-anchor: end; }
.pareto-svg .tick-x { text-anchor: middle; }
.pareto-svg .axis-title { fill: var(--text-secondary); font-size: 11.5px; text-anchor: middle; }

/* The staircase is context, not a series — it stays in ink, never a hue. */
.pareto-svg .frontier {
  fill: none; stroke: var(--baseline); stroke-width: 1.5;
  stroke-dasharray: 5 4; stroke-linejoin: round;
}

/* Marks are styled in both places they appear — the plot and the legend swatch.
   One declaration block per rule, two scopes, so the legend cannot drift from
   the chart. (Legend swatches are bare <svg>, not .pareto-svg, which is why the
   chart-only scope silently left them unstyled.) */
.pareto-svg .m, .legend .m { stroke: var(--surface-1); stroke-width: 1.5; }
.pareto-svg .m-harness, .legend .m-harness { fill: var(--s1); }
.pareto-svg .m-react,   .legend .m-react   { fill: var(--s2); }
.pareto-svg .m-agentic, .legend .m-agentic { fill: var(--s3); }
.pareto-svg .m-tuned,   .legend .m-tuned   { fill: var(--s4); }
/* Emphasised points carry a surface ring so they read as a second encoding,
   not a fifth hue. */
.pareto-svg .m-emph, .legend .m-emph { stroke: var(--text-primary); stroke-width: 2; }

/* Labels wear text ink, never the series colour. */
.pareto-svg .plabel { fill: var(--text-secondary); font-size: 11px; }
.pareto-svg .plabel-emph { fill: var(--text-primary); font-weight: 640; font-size: 11.5px; }

.legend { display: flex; flex-wrap: wrap; gap: .35rem 1.1rem; margin-bottom: .75rem; }
.legend .lg {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .82rem; color: var(--text-secondary);
}
.legend .lg svg { flex: none; overflow: visible; }
.legend .lg-note { color: var(--text-muted); }

.pareto-table { margin-top: 1.1rem; }
.pareto-table summary {
  cursor: pointer; font-size: .88rem; color: var(--text-secondary);
  padding: .35rem 0;
}
.pareto-table summary:hover { color: var(--text-primary); }

/* Direction-of-good annotation — an aside, so it stays in muted ink and never
   competes with the marks. */
.pareto-svg .better-label {
  fill: var(--text-secondary); font-size: 12px; font-weight: 600;
  font-style: normal; letter-spacing: .05em;
}

/* Direction-of-good wash across the whole plot: deepest at the top-right (high
   score, low cost), fading to nothing at the bottom-left. Background, not a
   series — it is the one neutral tone here, so it can never be mistaken for a
   fifth group. Ceiling stays low so marks and gridlines keep their contrast. */
.pareto-svg .better-zone { fill: url(#better-glow); }
.pareto-svg .bg-near { stop-color: var(--text-primary); stop-opacity: .105; }
.pareto-svg .bg-mid  { stop-color: var(--text-primary); stop-opacity: .042; }
.pareto-svg .bg-far  { stop-color: var(--text-primary); stop-opacity: 0; }

/* --- point hover ------------------------------------------------------ */
/* Only the hit targets take pointer events; everything else is decoration and
   must not swallow a hover meant for a mark underneath it. */
.pareto-svg .grid, .pareto-svg .axis, .pareto-svg .tick, .pareto-svg .axis-title,
.pareto-svg .frontier, .pareto-svg .plabel,
.pareto-svg .leader, .pareto-svg .better, .pareto-svg .better-zone,
.pareto-svg .better-edge { pointer-events: none; }

.pareto-svg .hit { fill: transparent; pointer-events: all; cursor: pointer; }
.pareto-svg .pt { outline: none; }
.pareto-svg .pt:hover .m,
.pareto-svg .pt:focus-visible .m {
  stroke: var(--text-primary); stroke-width: 2.5;
}
.pareto-svg .pt:focus-visible .hit {
  stroke: var(--accent); stroke-width: 2; stroke-dasharray: 3 3;
}
/* Dim the field so the hovered mark reads as the selected one. */
.pareto-svg:has(.pt:hover) .pt:not(:hover) .m,
.pareto-svg:has(.pt:focus-visible) .pt:not(:focus-visible) .m { opacity: .34; }

.pareto-wrap { position: relative; }
.pareto-tip {
  position: absolute; z-index: 5; pointer-events: none;
  min-width: 9.5rem; max-width: 17rem;
  padding: .5rem .65rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .16);
  font-size: .8rem; line-height: 1.45;
  opacity: 0; visibility: hidden;
  transform: translate(-50%, calc(-100% - 12px));
  transition: opacity .09s ease-out;
}
.pareto-tip.is-on { opacity: 1; visibility: visible; }
.pareto-tip .tip-name {
  display: flex; align-items: baseline; gap: .4rem;
  font-weight: 640; color: var(--text-primary); margin-bottom: .3rem;
}
.pareto-tip .sw {
  flex: none; width: 9px; height: 9px; border-radius: 2px;
  transform: translateY(-1px);
}
.pareto-tip[data-group="harness"] .sw { background: var(--s1); }
.pareto-tip[data-group="react"]   .sw { background: var(--s2); }
.pareto-tip[data-group="agentic"] .sw { background: var(--s3); }
.pareto-tip[data-group="tuned"]   .sw { background: var(--s4); }
.pareto-tip dl {
  display: grid; grid-template-columns: auto auto; gap: .1rem .7rem;
  margin: 0; justify-content: space-between;
}
.pareto-tip dt { color: var(--text-secondary); }
.pareto-tip dd {
  margin: 0; text-align: right; color: var(--text-primary);
  font-variant-numeric: tabular-nums; font-weight: 600;
}
.pareto-tip .tip-note {
  margin: .35rem 0 0; padding-top: .3rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted); font-size: .74rem;
}
@media (prefers-reduced-motion: reduce) { .pareto-tip { transition: none; } }

/* Two frontiers side by side on wide screens, stacked on narrow. One shared
   legend above both — identity is the same in each chart. */
.pareto-grid {
  display: grid; gap: 1.5rem 1.75rem; margin-top: .25rem;
  grid-template-columns: repeat(auto-fit, minmax(430px, 1fr));
}
.pareto-fig { margin: 0; }
.pareto-fig figcaption {
  font-size: .9rem; font-weight: 600; color: var(--text-primary);
  margin-bottom: .35rem;
}
.pareto-svg .leader { stroke: var(--baseline); stroke-width: 1; opacity: .6; }

/* Header lost its brand block, so the nav takes over pushing the theme toggle
   to the right edge. */
.site-header .nav { margin-right: auto; }

/* Hero: the product name is the h1, with the one-line description under it. */
.hero h1 { max-width: none; margin-bottom: .35rem; }
.hero .subtitle {
  font-size: clamp(1.05rem, .95rem + .5vw, 1.35rem);
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
  max-width: var(--measure);
}

/* Wordmark: "Gym" in dodger blue. The light step is nudged deeper (#0F7FE8)
   because true dodgerblue lands at 3.07:1 on the light surface — over the
   large-text floor but uncomfortably close; the dark step is dodgerblue as-is
   at 6.0:1. Same hue, selected per surface. */
.hero h1 .gym { color: #0F7FE8; }
.hero .subtitle { color: #1a6fd4; }

/* Emphasis blue for the one rule the benchmark turns on. Stepped per surface:
   the subtitle sits at ~21px, which WCAG counts as body text, so the light step
   is deepened to clear 4.5:1 (#1a6fd4 = 4.67:1) rather than using the display
   blue from the wordmark (3.07:1). */
.hl-blue { color: #1a6fd4; font-weight: 560; }

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) .hero h1 .gym { color: #1E90FF; }
  :root:where(:not([data-theme="light"])) .hero .subtitle { color: #6BB1FF; }
  :root:where(:not([data-theme="light"])) .hl-blue { color: #6BB1FF; }
  :root:where(:not([data-theme="light"])) .system .fh { color: #6BB1FF; }
}
:root[data-theme="dark"] .hero h1 .gym { color: #1E90FF; }
:root[data-theme="dark"] .hero .subtitle { color: #6BB1FF; }
:root[data-theme="dark"] .hl-blue { color: #6BB1FF; }
:root[data-theme="dark"] .system .fh { color: #6BB1FF; }

/* --- leaderboard system links ----------------------------------------- */
/* Identity stays with the row's text; the link is a quiet secondary action,
   so it wears link ink rather than a chip's filled background. */
.ref-link {
  display: inline-flex;
  align-items: baseline;
  gap: .25em;
  white-space: nowrap;
  font-size: .86rem;
  color: var(--accent-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.ref-link:hover,
.ref-link:focus-visible { border-bottom-color: currentColor; }
.ref-link .ext { font-size: .78em; opacity: .6; }

/* --- tabbed panels ---------------------------------------------------- */
.tabs { margin-top: 1.25rem; }
.tablist {
  display: flex; gap: .25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.1rem;
}
.tablist [role="tab"] {
  appearance: none; background: none; border: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: .5rem .8rem;
  font: inherit; font-size: .9rem; font-weight: 550;
  color: var(--text-secondary); cursor: pointer;
}
.tablist [role="tab"]:hover { color: var(--text-primary); }
/* Selection is carried by the underline plus the ink step, never by hue alone. */
.tablist [role="tab"][aria-selected="true"] {
  color: var(--text-primary);
  border-bottom-color: var(--accent);
}
.tabpanel > :first-child { margin-top: 0; }
.tabpanel table { margin-top: 0; }

/* A control that reads as prose — used for the in-text tab pointer. */
.linklike {
  appearance: none; background: none; border: 0; padding: 0;
  font: inherit; color: var(--accent-ink); cursor: pointer;
  text-decoration: underline; text-underline-offset: 2px;
}
.linklike:hover { color: var(--accent); }

/* Nested options inside a numbered step — numbered, but visually lighter than
   the steps they sit under. */
.substeps {
  margin: .35rem 0 1rem;
  padding-left: 1.35rem;
  color: var(--text-secondary);
}
.substeps li { margin-bottom: .45rem; }
.substeps li::marker { color: var(--text-muted); font-variant-numeric: tabular-nums; }

/* Field-reference tables: keep the Type column on one line. `string
   YYYY-MM-DD` was wrapping to two rows and making the row taller than its
   neighbours. nowrap lets the column claim the width it needs; the Description
   column absorbs the difference since it is the one that should wrap. */
.fields td:nth-child(2),
.fields th:nth-child(2) { white-space: nowrap; }

/* The frontier chart is a distinct block inside the leaderboard section now
   that it is no longer a section of its own — give it the same rule-and-gap
   separation the page uses between sections. */
.pareto-block {
  margin-top: 2.75rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--border);
}
.pareto-block > h3 { margin-bottom: .5rem; }