/* ==========================================================================
   Cricket Bench — bench.mattalldian.com
   Sibling of darts.mattalldian.com. Light paper by default; dark mode is a
   chalkboard. Display: Barlow Condensed (scoreboard signage). Prose: Source
   Serif 4 (continuity with the sibling). UI + numbers: Barlow, tabular.
   Chart series colours encode model family only (validated palette, see
   scripts/ notes). Red accent is structure (rules, marks, focus), never data.
   ========================================================================== */

:root {
  color-scheme: light;
  --paper:        oklch(0.972 0.009 80);
  --paper-2:      oklch(0.948 0.012 78);
  --surface:      oklch(0.988 0.004 85);
  --ink:          oklch(0.235 0.014 60);
  --ink-2:        oklch(0.42 0.016 60);
  --ink-3:        oklch(0.54 0.014 65);
  --rule:         oklch(0.86 0.014 72);
  --rule-strong:  oklch(0.74 0.018 70);
  --accent:       oklch(0.53 0.17 28);   /* dartboard red: structure only */
  --accent-text:  oklch(0.47 0.16 28);   /* AA on paper */
  --accent-wash:  oklch(0.93 0.035 35);
  --link:         oklch(0.45 0.15 28);

  /* model families (validated categorical order) */
  --fam-fable:  #2a78d6;
  --fam-opus:   #eb6834;
  --fam-astra:  #1baf7a;
  --fam-sonnet: #4a3aa7;
  --fam-luna:   #e87ba4;
  --fam-other:  oklch(0.6 0.01 70);

  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-ui:      "Barlow", system-ui, sans-serif;
  --font-prose:   "Source Serif 4", Georgia, serif;

  --step--1: 0.84rem;
  --step-0:  1.0625rem;
  --step-1:  1.33rem;
  --step-2:  clamp(1.6rem, 1.3rem + 1.2vw, 2.1rem);
  --step-3:  clamp(2.2rem, 1.6rem + 2.6vw, 3.4rem);
  --step-4:  clamp(3rem, 2rem + 5vw, 5.6rem);

  --space-2xs: 4px;  --space-xs: 8px;  --space-sm: 12px; --space-md: 16px;
  --space-lg: 24px;  --space-xl: 32px; --space-2xl: 48px; --space-3xl: 64px;
  --space-4xl: 96px;

  --measure: 68ch;
  --wide: 1080px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper:       oklch(0.235 0.012 165);   /* chalkboard */
    --paper-2:     oklch(0.27 0.014 165);
    --surface:     oklch(0.21 0.011 165);
    --ink:         oklch(0.94 0.008 90);
    --ink-2:       oklch(0.82 0.01 90);
    --ink-3:       oklch(0.7 0.012 100);
    --rule:        oklch(0.36 0.014 165);
    --rule-strong: oklch(0.48 0.016 165);
    --accent:      oklch(0.68 0.15 30);
    --accent-text: oklch(0.76 0.12 32);
    --accent-wash: oklch(0.32 0.05 30);
    --link:        oklch(0.8 0.1 40);
    --fam-fable:  #3987e5;
    --fam-opus:   #d95926;
    --fam-astra:  #199e70;
    --fam-sonnet: #9085e9;
    --fam-luna:   #d55181;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: oklch(0.235 0.012 165); --paper-2: oklch(0.27 0.014 165);
  --surface: oklch(0.21 0.011 165); --ink: oklch(0.94 0.008 90);
  --ink-2: oklch(0.82 0.01 90); --ink-3: oklch(0.7 0.012 100);
  --rule: oklch(0.36 0.014 165); --rule-strong: oklch(0.48 0.016 165);
  --accent: oklch(0.68 0.15 30); --accent-text: oklch(0.76 0.12 32);
  --accent-wash: oklch(0.32 0.05 30); --link: oklch(0.8 0.1 40);
  --fam-fable: #3987e5; --fam-opus: #d95926; --fam-astra: #199e70;
  --fam-sonnet: #9085e9; --fam-luna: #d55181;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--step-0)/1.62 var(--font-prose);
  font-optical-sizing: auto;
  overflow-x: hidden;
}
img, svg { max-width: 100%; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--accent-wash); }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 50; }
.skip:focus { left: 8px; }

/* ---------- masthead ---------- */
.mast {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in oklch, var(--paper) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(6px);
  border-bottom: 1px solid var(--rule);
}
.mast__inner {
  max-width: var(--wide); margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: center; gap: var(--space-md);
}
.brand {
  font: 700 1.35rem/1 var(--font-display); letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 10px;
  white-space: nowrap;
}
.brand__mark { width: 22px; height: 22px; flex: none; }
.board-nav { margin-left: auto; display: flex; gap: 2px; }
.board-nav a {
  display: grid; justify-items: center; gap: 1px; min-width: 38px; padding: 4px 4px 3px;
  font: 600 0.95rem/1 var(--font-display); color: var(--ink-2); text-decoration: none;
  border-radius: 3px;
}
.board-nav a .mk { font: 500 0.8rem/1 var(--font-ui); color: var(--ink-3); height: 0.9rem; }
.board-nav a:hover { background: var(--paper-2); color: var(--ink); }
.board-nav a[aria-current="page"] { color: var(--accent-text); background: var(--accent-wash); }
.board-nav a.closed .mk { color: var(--accent-text); }
.theme-toggle {
  border: 1px solid var(--rule-strong); background: transparent; color: var(--ink-2);
  width: 34px; height: 34px; border-radius: 50%; cursor: pointer; flex: none;
  display: grid; place-items: center;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--ink-3); }
@media (max-width: 720px) {
  .mast__inner { flex-wrap: wrap; row-gap: 6px; padding: 8px 16px; }
  .board-nav { order: 3; width: 100%; margin-left: 0; justify-content: space-between; }
  .board-nav a { min-width: 0; flex: 1; }
  .theme-toggle { margin-left: auto; }
}

/* ---------- chapter hero ---------- */
.hero {
  max-width: var(--wide); margin: 0 auto; padding: var(--space-3xl) 16px var(--space-2xl);
  display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-lg);
}
.hero__target {
  font: 700 var(--step-4)/0.8 var(--font-display); color: var(--accent);
  letter-spacing: -0.01em; display: flex; align-items: baseline; gap: 14px;
}
.hero__target small {
  font: 600 var(--step--1)/1.2 var(--font-ui); letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-3);
}
.hero h1 {
  font: 700 var(--step-3)/0.98 var(--font-display); text-transform: uppercase;
  letter-spacing: 0.005em; margin: 0; max-width: 18ch; text-wrap: balance;
}
.hero .dek {
  font: 400 var(--step-1)/1.45 var(--font-prose); color: var(--ink-2); margin: 0;
  max-width: 58ch; text-wrap: pretty;
}
.stamp {
  font: 500 var(--step--1)/1.3 var(--font-ui); color: var(--ink-3);
  display: flex; flex-wrap: wrap; gap: 6px 18px;
}
.stamp b { color: var(--ink-2); font-weight: 600; }
@media (min-width: 900px) {
  .hero { grid-template-columns: 180px minmax(0, 1fr); column-gap: var(--space-2xl); }
  .hero__target { grid-row: 1 / span 4; flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ---------- prose ---------- */
main { display: block; }
.prose { max-width: var(--wide); margin: 0 auto; padding: 0 16px var(--space-3xl); }
.prose > * { max-width: var(--measure); }
.prose > .wide, .prose > figure, .prose > .table-wrap, .prose > .grid-2 { max-width: none; }
@media (min-width: 900px) {
  .prose { padding-left: calc(16px + 180px + var(--space-2xl)); }
  .prose > .wide, .prose > figure.bleed { margin-left: calc(-180px - var(--space-2xl)); }
}
.prose h2 {
  font: 700 var(--step-2)/1.05 var(--font-display); text-transform: uppercase;
  letter-spacing: 0.01em; margin: var(--space-3xl) 0 var(--space-md);
  display: flex; align-items: baseline; gap: 12px; text-wrap: balance;
}
.prose h2 .sec {
  font: 600 var(--step--1)/1 var(--font-ui); color: var(--accent-text); letter-spacing: 0.08em;
  border: 1px solid currentColor; border-radius: 3px; padding: 4px 6px 3px; flex: none;
  transform: translateY(-4px);
}
.prose h3 {
  font: 600 var(--step-1)/1.2 var(--font-ui); margin: var(--space-2xl) 0 var(--space-xs);
}
.prose p { margin: 0 0 var(--space-md); text-wrap: pretty; }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 var(--space-md); }
.prose li { margin-bottom: 6px; }
.prose li::marker { color: var(--ink-3); }
.lede { font-size: var(--step-1); line-height: 1.5; color: var(--ink); }
.num, .tab { font-family: var(--font-ui); font-variant-numeric: tabular-nums; }
.pp { font-family: var(--font-ui); font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }
.muted { color: var(--ink-3); }
q, blockquote { font-style: italic; }
blockquote {
  margin: var(--space-lg) 0; padding: var(--space-md) var(--space-lg);
  background: var(--paper-2); border-radius: 4px; font-size: 1.02em;
}
blockquote cite { display: block; margin-top: 8px; font: normal 500 var(--step--1)/1.3 var(--font-ui); color: var(--ink-3); }
code { font: 0.88em/1 ui-monospace, "SF Mono", Menlo, monospace; background: var(--paper-2); padding: 2px 5px; border-radius: 3px; }

/* the claim: a section's key finding. Full border, not a side stripe. */
.claim {
  border: 1px solid var(--rule-strong); border-radius: 6px; padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0; background: var(--surface);
  display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; align-items: baseline;
}
.claim__mark { font: 700 1.5rem/1 var(--font-display); color: var(--accent); grid-row: span 2; }
.claim p { margin: 0; }
.claim .claim__src { font: 500 var(--step--1)/1.35 var(--font-ui); color: var(--ink-3); grid-column: 2; }

.caveat {
  font: 400 0.95rem/1.5 var(--font-ui); color: var(--ink-2);
  background: var(--paper-2); border-radius: 4px; padding: 10px 14px; margin: var(--space-md) 0;
}
.caveat b { color: var(--ink); }

/* ---------- findings list (index) ---------- */
.findings { list-style: none; padding: 0; margin: var(--space-lg) 0; counter-reset: f; display: grid; gap: 0; }
.findings li {
  counter-increment: f; display: grid; grid-template-columns: 3.2rem 1fr; gap: 12px;
  padding: var(--space-md) 0; border-top: 1px solid var(--rule); margin: 0;
}
.findings li:last-child { border-bottom: 1px solid var(--rule); }
.findings li::before {
  content: counter(f, decimal-leading-zero); font: 700 1.7rem/1 var(--font-display); color: var(--accent);
}
.findings h3 { margin: 0 0 4px; font: 600 1.15rem/1.3 var(--font-ui); }
.findings p { margin: 0; color: var(--ink-2); }

/* ---------- figures & charts ---------- */
figure { margin: var(--space-2xl) 0; }
.chart-card {
  background: var(--surface); border: 1px solid var(--rule); border-radius: 8px;
  padding: var(--space-lg) var(--space-lg) var(--space-md);
}
@media (max-width: 600px) { .chart-card { padding: var(--space-md) 10px var(--space-sm); } }
.chart-head { display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: flex-end; margin-bottom: var(--space-md); }
.chart-title { font: 600 1.1rem/1.25 var(--font-ui); margin: 0; }
.chart-sub { font: 400 0.9rem/1.4 var(--font-ui); color: var(--ink-3); margin: 2px 0 0; }
.controls { display: flex; flex-wrap: wrap; gap: 6px; margin-left: auto; }
.seg { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: 999px; padding: 2px; }
.seg button {
  font: 600 0.82rem/1 var(--font-ui); letter-spacing: 0.02em; color: var(--ink-2);
  background: transparent; border: 0; border-radius: 999px; padding: 7px 12px; cursor: pointer;
  min-height: 32px;
}
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font: 500 0.85rem/1.2 var(--font-ui); color: var(--ink-2); margin: 0 0 var(--space-sm); padding: 0; list-style: none; }
.legend li { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }
.swatch--dot { width: 10px; height: 10px; border-radius: 50%; }
figcaption { font: 400 0.88rem/1.45 var(--font-ui); color: var(--ink-3); margin-top: var(--space-sm); max-width: 80ch; }
figcaption b { color: var(--ink-2); font-weight: 600; }

svg.chart { display: block; width: 100%; height: auto; overflow: visible; font-family: var(--font-ui); }
svg.chart .grid line { stroke: var(--rule); stroke-width: 1; }
svg.chart .axis text, svg.chart .tick { fill: var(--ink-3); font-size: 11px; font-variant-numeric: tabular-nums; }
svg.chart .axis-label { fill: var(--ink-3); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; }
svg.chart .baseline { stroke: var(--ink-3); stroke-dasharray: 3 4; stroke-width: 1; }
svg.chart .baseline-label { fill: var(--ink-3); font-size: 11px; }
svg.chart .dlabel { font-size: 12px; font-weight: 600; fill: var(--ink); }
svg.chart .dlabel.sub { font-weight: 500; fill: var(--ink-2); }
svg.chart .series { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; transition: opacity 0.25s var(--ease-out); }
svg.chart .series.dim { opacity: 0.12; }
svg.chart .crosshair { stroke: var(--ink-3); stroke-width: 1; }
svg.chart .hit { fill: transparent; }

.tip {
  position: absolute; pointer-events: none; z-index: 30; min-width: 170px; max-width: 280px;
  background: var(--ink); color: var(--paper); border-radius: 6px; padding: 8px 10px;
  font: 500 0.8rem/1.4 var(--font-ui); font-variant-numeric: tabular-nums;
  opacity: 0; transform: translateY(4px); transition: opacity 0.12s, transform 0.12s var(--ease-out);
}
.tip.on { opacity: 1; transform: none; }
.tip b { font-weight: 700; }
.tip .row { display: flex; justify-content: space-between; gap: 12px; }
.tip .sw { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.chart-wrap { position: relative; }

details.table-view { margin-top: var(--space-sm); font-family: var(--font-ui); }
details.table-view summary { cursor: pointer; font: 600 0.85rem/1.2 var(--font-ui); color: var(--link); padding: 6px 0; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: var(--space-lg) 0; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; font: 400 0.9rem/1.35 var(--font-ui); font-variant-numeric: tabular-nums; }
caption { text-align: left; font: 600 0.95rem/1.3 var(--font-ui); padding-bottom: 8px; caption-side: top; }
caption span { font-weight: 400; color: var(--ink-3); }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
thead th { font: 600 0.74rem/1.2 var(--font-ui); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); border-bottom: 1px solid var(--rule-strong); white-space: nowrap; }
td.r, th.r { text-align: right; }
tbody tr:hover { background: var(--paper-2); }
td .fam { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 8px; vertical-align: 1px; }
tr.best td { font-weight: 700; }

/* ---------- timeline ---------- */
.eras { list-style: none; padding: 0; margin: var(--space-xl) 0; position: relative; }
.era { display: grid; grid-template-columns: 7.5rem 1fr; gap: 0 var(--space-lg); position: relative; padding-bottom: var(--space-xl); }
.era::before { content: ""; position: absolute; left: calc(7.5rem + 11px); top: 18px; bottom: 0; width: 1px; background: var(--rule-strong); }
.era:last-child::before { display: none; }
.era__when { font: 600 0.82rem/1.3 var(--font-ui); color: var(--ink-3); letter-spacing: 0.04em; text-transform: uppercase; padding-top: 4px; text-align: right; }
.era__body { position: relative; padding-left: 34px; }
.era__body::before {
  content: attr(data-mark); position: absolute; left: 0; top: 0; width: 23px; height: 23px;
  display: grid; place-items: center; font: 700 0.95rem/1 var(--font-display); color: var(--accent);
  background: var(--paper); border: 1px solid var(--accent); border-radius: 50%;
}
.era h3 { font: 700 1.4rem/1.1 var(--font-display); text-transform: uppercase; letter-spacing: 0.01em; margin: 0 0 6px; }
.era p { margin: 0 0 8px; }
.era .figure-num { font: 700 1.05rem/1.3 var(--font-ui); color: var(--ink); }
.era--pivot .era__body::before { background: var(--accent); color: var(--paper); }
@media (max-width: 640px) {
  .era { grid-template-columns: 1fr; }
  .era::before { left: 11px; top: 30px; }
  .era__when { text-align: left; padding-left: 34px; padding-bottom: 6px; }
}

/* ---------- arm cards / two-col ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-lg); margin: var(--space-xl) 0; }
.arm-note { border-top: 2px solid var(--ink); padding-top: var(--space-sm); }
.arm-note h3 { margin: 0 0 4px; font: 700 1.25rem/1.15 var(--font-display); text-transform: uppercase; letter-spacing: 0.01em; display: flex; align-items: center; gap: 8px; }
.arm-note .meta { font: 500 0.82rem/1.3 var(--font-ui); color: var(--ink-3); margin: 0 0 10px; }
.arm-note p { font-size: 0.98rem; margin: 0 0 8px; }
.arm-note .score { font: 700 2rem/1 var(--font-display); font-variant-numeric: tabular-nums; }

/* ---------- chapter nav ---------- */
.next {
  max-width: var(--wide); margin: 0 auto; padding: var(--space-2xl) 16px var(--space-3xl);
  border-top: 1px solid var(--rule); display: grid; gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.next a {
  display: grid; grid-template-columns: auto 1fr; gap: 2px 14px; text-decoration: none; color: var(--ink);
  padding: var(--space-md); border: 1px solid var(--rule); border-radius: 6px;
}
.next a:hover { border-color: var(--ink-3); background: var(--surface); }
.next .t { font: 700 2.2rem/1 var(--font-display); color: var(--accent); grid-row: span 2; }
.next .k { font: 600 0.72rem/1.2 var(--font-ui); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.next .n { font: 700 1.2rem/1.15 var(--font-display); text-transform: uppercase; }
.next a.prev { text-align: right; grid-template-columns: 1fr auto; }
.next a.prev .t { grid-column: 2; grid-row: 1 / span 2; }

footer.site {
  border-top: 1px solid var(--rule); font: 400 0.85rem/1.5 var(--font-ui); color: var(--ink-3);
}
footer.site .inner { max-width: var(--wide); margin: 0 auto; padding: var(--space-lg) 16px var(--space-2xl); display: flex; flex-wrap: wrap; gap: 8px 24px; }

/* ---------- motion ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(10px); transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out); }
  .reveal.in { opacity: 1; transform: none; }
  .hero > * { animation: rise 0.7s var(--ease-out) both; }
  .hero > *:nth-child(2) { animation-delay: 0.06s; }
  .hero > *:nth-child(3) { animation-delay: 0.12s; }
  .hero > *:nth-child(4) { animation-delay: 0.18s; }
  @keyframes rise { from { opacity: 0; transform: translateY(12px); } }
}

.fam { display: inline-block; width: 9px; height: 9px; border-radius: 50%; flex: none; }
.fam--fable { background: var(--fam-fable); } .fam--opus { background: var(--fam-opus); }
.fam--astra { background: var(--fam-astra); } .fam--sonnet { background: var(--fam-sonnet); }
.fam--luna { background: var(--fam-luna); } .fam--other { background: var(--fam-other); }

/* timeline uses the hero gutter for dates on wide screens */
.prose > .eras { max-width: none; --when-w: 7.5rem; }
.eras .era { grid-template-columns: var(--when-w) minmax(0, 68ch); }
.eras .era::before { left: calc(var(--when-w) + var(--space-lg) + 11px); }
@media (min-width: 900px) {
  .prose > .eras { --when-w: 180px; margin-left: calc(-180px - var(--space-2xl)); }
  .eras .era { column-gap: var(--space-2xl); }
  .eras .era::before { left: calc(var(--when-w) + var(--space-2xl) + 11px); }
}
@media (max-width: 640px) {
  .eras .era { grid-template-columns: 1fr; }
  .eras .era::before { left: 11px; }
}

.gloss { display: grid; grid-template-columns: minmax(8rem, max-content) 1fr; gap: 10px 20px; margin: var(--space-md) 0; }
.gloss dt { font: 600 0.95rem/1.4 var(--font-ui); }
.gloss dd { margin: 0; }
@media (max-width: 560px) { .gloss { grid-template-columns: 1fr; gap: 2px; } .gloss dd { margin-bottom: 10px; } }
.seg button { white-space: nowrap; }
@media (max-width: 560px) { .seg button { padding: 7px 9px; font-size: 0.78rem; } .controls { margin-left: 0; } }
.prose p.src, p.src { font: 500 var(--step--1)/1.35 var(--font-ui); color: var(--ink-3); margin-top: -8px; }