/* Touchstone — "Assay" design system.
   Colour is reserved for verification state. Everything else is stone and bone. */

/* ---------- tokens ---------- */

:root {
  /* ground */
  --stone-900: #0A0B0C;   /* page background */
  --stone-800: #101214;   /* raised section */
  --stone-700: #16191C;   /* card surface */
  --stone-600: #1E2226;   /* card surface, elevated */
  --rule:      #262B30;   /* 1px borders, dividers */
  --rule-soft: #1A1E22;   /* internal table lines */

  /* ink */
  --bone-100:  #ECEAE5;   /* primary text, headings */
  --bone-200:  #C9CDD0;   /* body text */
  --bone-400:  #929A9F;   /* secondary, labels */
  --bone-600:  #646C72;   /* meta, captions, disabled */

  /* the streak — permitted ONLY on: the wordmark rule, the current-nav indicator,
     and the primary CTA border. Never on data, never on a state, never decorative. */
  --copper:    #C2703F;
  --copper-dim:#8A4E2C;

  /* verification state — the only other saturated colour on the site */
  --st-satisfied:    #7FB07C;
  --st-unevaluable:  #8B9298;  /* deliberately neutral: abstention is a decision, not an error */
  /* The same state at display size. #8B9298 is correct on a chip and wrong at 68px, where it
     stops reading as "composed" and starts reading as "greyed out" — the one impression this
     hero must not give. Lifted in luminance only: still neutral, never amber or red, because
     an abstention that looks like an error has misdescribed the product. */
  --st-unevaluable-display: #C9D0D4;
  --st-stale:        #C79A4B;
  --st-inconsistent: #D06A55;

  /* state chip backgrounds — 12% of the state colour over --stone-700 */
  --st-satisfied-bg:    #18251B;
  --st-unevaluable-bg:  #1B1F22;
  --st-stale-bg:        #241E12;
  --st-inconsistent-bg: #26150F;

  /* space, 8px base */
  --s1: 4px;  --s2: 8px;   --s3: 12px;  --s4: 16px;  --s5: 24px;
  --s6: 32px; --s7: 48px;  --s8: 64px;  --s9: 96px;  --s10: 144px;

  /* motion */
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
  --dur: 180ms;

  color-scheme: dark;
}

/* ---------- fonts, self-hosted ---------- */

@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/InterVariable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/JetBrainsMono.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

/* ---------- reset, ground ---------- */

*, *::before, *::after { box-sizing: border-box; }

html { height: 100%; }

body {
  margin: 0;
  min-height: 100%;
  background: var(--stone-900);
  color: var(--bone-200);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-feature-settings: "cv05" 1, "ss03" 1, "tnum" 1;
  font-size: 1rem;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

code, pre, .mono {
  font-family: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.6;
  font-weight: 400;
  letter-spacing: 0;
}

::selection { background: var(--rule); color: var(--bone-100); }

:focus-visible {
  outline: 2px solid var(--bone-100);
  outline-offset: 3px;
  border-radius: 2px;
}

a { color: var(--bone-100); text-decoration: underline; text-decoration-color: var(--bone-600); text-underline-offset: 3px; transition: text-decoration-color var(--dur) var(--ease); }
a:hover { text-decoration-color: var(--bone-100); }

.sr {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: var(--s5); top: -100px;
  z-index: 10;
  background: var(--stone-700);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: var(--s2) var(--s4);
  font-size: 0.875rem;
}
.skip:focus-visible { top: var(--s3); }

/* ---------- type scale ---------- */

.t-display {
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  line-height: 1.02;
  font-weight: 620;
  letter-spacing: -0.03em;
}

.t-h1, h1 {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  line-height: 1.10;
  font-weight: 600;
  letter-spacing: -0.022em;
  color: var(--bone-100);
  margin: 0;
}

.t-h2, h2 {
  font-size: 1.75rem;
  line-height: 1.20;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--bone-100);
  margin: 0 0 var(--s5);
}

.t-h3, h3 {
  font-size: 1.1875rem;
  line-height: 1.35;
  font-weight: 600;
  letter-spacing: -0.008em;
  color: var(--bone-100);
  margin: 0 0 var(--s3);
}

.t-lead {
  font-size: 1.1875rem;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--bone-200);
}

.t-small { font-size: 0.875rem; line-height: 1.55; }

.t-micro {
  font-size: 0.75rem;
  line-height: 1.4;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.t-mono { font-size: 0.8125rem; line-height: 1.6; }

/* mono headings keep natural tracking and heading size */
h1.mono, .t-h1.mono {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  line-height: 1.10;
  letter-spacing: 0;
  font-weight: 600;
}

/* inline mono inside prose scales with its surroundings */
p code, li code, dd code, p span.mono { font-size: 0.875em; }

p { margin: 0 0 var(--s4); }
p:last-child { margin-bottom: 0; }

.prose { max-width: 68ch; }
.prose p + p { margin-top: var(--s4); }

.eyebrow {
  font-size: 0.75rem;
  line-height: 1.4;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--bone-600);
  margin: 0 0 var(--s4);
}

.meta { color: var(--bone-600); }
.secondary { color: var(--bone-400); }

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

.wrap {
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--s5);
}

main { display: block; }

.section { padding-block: var(--s8) 0; }
.section:last-of-type { padding-bottom: var(--s8); }

@media (min-width: 720px) {
  .wrap { padding-inline: var(--s7); }
  .section { padding-block: var(--s10) 0; }
  .section:last-of-type { padding-bottom: var(--s10); }
}

/* ---------- header ---------- */

.site-head { border-bottom: 1px solid var(--rule); }

.head-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s4) var(--s6);
  padding-block: var(--s5);
}

.wordmark {
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--bone-100);
  text-decoration: none;
  border-bottom: 2px solid var(--copper);
  padding-bottom: 3px;
}

.site-nav { display: flex; flex-wrap: wrap; gap: var(--s5); }

.site-nav a {
  font-size: 0.875rem;
  color: var(--bone-400);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease);
}
.site-nav a:hover { color: var(--bone-100); }
.site-nav a[aria-current="page"] {
  color: var(--bone-100);
  border-bottom-color: var(--copper);
}

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--rule);
  margin-top: var(--s9);
  padding-block: var(--s7);
  color: var(--bone-600);
  font-size: 0.875rem;
  line-height: 1.55;
}
.site-foot .foot-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s5) var(--s8);
}
.site-foot .mono { color: var(--bone-600); word-break: break-all; }
.site-foot p { margin: 0 0 var(--s2); }
.site-foot a { color: var(--bone-400); }

/* ---------- hero / verdict ---------- */

.hero { padding-block: var(--s9) var(--s8); }
@media (min-width: 720px) { .hero { padding-block: var(--s10) var(--s9); } }
/* The gap under the hero was --s9 over an already-empty right half, which compounded into a
   dead band rather than a rest. With the manifest filling the row, --s9 is the whole rhythm. */
@media (min-width: 1024px) { .hero { padding-block: var(--s9); } }

.hero-verdict { max-width: 46rem; }

/* Below 1024px the dot strip already carries the eight results and the manifest would only
   repeat it down a narrow column, so it is not rendered at all. */
.hero-manifest { display: none; }

@media (min-width: 1024px) {
  /* At 1440 the verdict used about 620px and the remaining ~800px was empty, which read as
     unfinished rather than spacious. It is filled with the eight controls themselves —
     the same results the dot strip encodes, named — so the space carries information
     instead of decoration, and the hero previews the dossier it links to. */
  .hero .wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 21rem;
    gap: var(--s8);
    align-items: start;
  }
  .hero-manifest {
    display: block;
    background: var(--stone-700);
    border: 1px solid var(--rule);
    border-radius: 10px;
    padding: var(--s5);
  }
}

.manifest-title {
  font-size: 0.75rem;
  line-height: 1.4;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--bone-600);
  margin: 0 0 var(--s3);
}

.manifest-list { list-style: none; margin: 0; padding: 0; }

.manifest-list li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  align-items: baseline;
  gap: var(--s3);
  padding-block: var(--s3);
  border-top: 1px solid var(--rule-soft);
}
.manifest-list li:first-child { border-top: 0; }

/* The dot is nudged off the baseline grid rather than centred, so it sits with the x-height
   of the id beside it instead of floating above it. */
.manifest-list .dot {
  width: 10px; height: 10px; border-radius: 50%;
  transform: translateY(1px);
}
.manifest-list .d-s { background: var(--st-satisfied); }
.manifest-list .d-u { background: transparent; border: 2px solid var(--st-unevaluable); }

.manifest-list code {
  font-family: "JetBrains Mono", ui-monospace, Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--bone-200);
  word-break: break-all;
}

.manifest-foot {
  margin: var(--s4) 0 0;
  padding-top: var(--s4);
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
  line-height: 1.55;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-verdict { animation: verdict-rise 240ms var(--ease) both; }
  @keyframes verdict-rise {
    from { opacity: 0; transform: translateY(2px); }
    to   { opacity: 1; transform: none; }
  }
}

.state-unverifiable-display {
  color: var(--st-unevaluable-display);
  font-weight: 660;
  letter-spacing: -0.035em;
  margin: 0 0 var(--s5);
}

.hero .t-lead { margin: 0 0 var(--s6); }

.hero-meta {
  color: var(--bone-600);
  margin-top: var(--s5);
}

/* the eight-dot verdict strip */
.verdict-strip {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s3) var(--s4);
  background: var(--stone-800);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: var(--s3) var(--s4);
}

.dots {
  display: flex;
  gap: var(--s2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.dots li { width: 10px; height: 10px; border-radius: 50%; }
.dots .d-s { background: var(--st-satisfied); }
.dots .d-u { background: transparent; border: 2px solid var(--st-unevaluable); }

.strip-label { font-size: 0.875rem; line-height: 1.55; color: var(--bone-400); margin: 0; }

/* ---------- state chips ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  border: 1px solid var(--rule-soft);
  border-radius: 999px;
  padding: 3px var(--s3);
  font-size: 0.75rem;
  line-height: 1.4;
  font-weight: 560;
  letter-spacing: 0.09em;
  white-space: nowrap;
}

.chip .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }

.chip-satisfied { color: var(--st-satisfied); background: var(--st-satisfied-bg); }
.chip-satisfied .dot { background: var(--st-satisfied); }

.chip-unevaluable { color: var(--st-unevaluable); background: var(--st-unevaluable-bg); }
.chip-unevaluable .dot { background: transparent; border: 2px solid var(--st-unevaluable); }

/* ---------- cards, surfaces ---------- */

.card {
  background: var(--stone-700);
  border: 1px solid var(--rule);
  border-radius: 10px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.02) inset;
  padding: var(--s5);
}
@media (min-width: 720px) { .card { padding: var(--s6); } }

.inset {
  background: var(--stone-800);
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  padding: var(--s3) var(--s4);
}

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

.control-list {
  display: grid;
  gap: var(--s5);
  margin-top: var(--s6);
}

.control-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s3) var(--s5);
  margin-bottom: var(--s4);
}

.control-id {
  font-family: "JetBrains Mono", ui-monospace, Consolas, monospace;
  font-size: 0.9375rem;
  line-height: 1.5;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--bone-100);
  margin: 0;
  word-break: break-all;
}

.control-subject { color: var(--bone-200); margin: 0 0 var(--s5); max-width: 68ch; }

.span-inset {
  background: var(--stone-800);
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  padding: var(--s3) var(--s4);
  margin-bottom: var(--s5);
}
.span-inset .span-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--bone-600);
  margin-bottom: var(--s1);
}
.span-inset code { color: var(--bone-200); word-break: break-all; }

.abstain {
  color: var(--bone-200);
  border-left: 2px solid var(--rule);
  padding-left: var(--s4);
  margin: 0 0 var(--s5);
  max-width: 68ch;
}

.fields { margin: 0; display: grid; gap: var(--s2) var(--s6); }
.fields > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px var(--s5);
  padding-block: var(--s2);
  border-top: 1px solid var(--rule-soft);
}
.fields dt {
  font-size: 0.75rem;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--bone-600);
}
.fields dd { margin: 0; color: var(--bone-200); word-break: break-word; }
.fields dd.mono, .fields dd code { color: var(--bone-200); }

@media (min-width: 640px) {
  .fields > div { grid-template-columns: 11rem minmax(0, 1fr); align-items: baseline; }
}

/* dissection variant: label / value / gloss */
.anatomy .fields > div { grid-template-columns: 1fr; }
@media (min-width: 900px) {
  .anatomy .fields > div { grid-template-columns: 13rem minmax(0, 26rem) minmax(0, 1fr); }
}
.anatomy .gloss { color: var(--bone-400); font-size: 0.875rem; line-height: 1.55; }

/* ---------- digest component ---------- */

.digest { display: inline-block; max-width: 100%; }

.digest summary {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: var(--s2);
  cursor: pointer;
  list-style: none;
}
.digest summary::-webkit-details-marker { display: none; }
.digest summary code { color: var(--bone-400); }
.digest summary .tog::after {
  content: "full";
  font-family: "Inter", system-ui, sans-serif;
  font-size: 0.6875rem;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--bone-600);
  border-bottom: 1px solid var(--rule);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.digest summary:hover .tog::after { color: var(--bone-400); border-color: var(--bone-600); }
.digest[open] summary .tog::after { content: "hide"; }

.digest .full {
  display: block;
  margin-top: var(--s2);
  background: var(--stone-800);
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  padding: var(--s2) var(--s3);
  color: var(--bone-200);
  word-break: break-all;
}

/* full digest shown without truncation */
.digest-full-block {
  background: var(--stone-800);
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  padding: var(--s3) var(--s4);
  word-break: break-all;
  color: var(--bone-200);
}

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

.table-scroll { position: relative; overflow-x: auto; border: 1px solid var(--rule); border-radius: 10px; background: var(--stone-700); }

table { border-collapse: collapse; width: 100%; min-width: 640px; }

th {
  text-align: left;
  font-size: 0.75rem;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--bone-600);
  padding: var(--s3) var(--s4);
  border-bottom: 1px solid var(--rule);
}

td {
  font-size: 0.875rem;
  line-height: 1.55;
  padding: var(--s3) var(--s4);
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: baseline;
}
tr:last-child td { border-bottom: 0; }

td a { text-decoration-color: var(--bone-600); }

/* ---------- three movements ---------- */

.movements {
  display: grid;
  gap: var(--s6);
  margin-top: var(--s6);
}
@media (min-width: 840px) {
  .movements { grid-template-columns: repeat(3, 1fr); gap: var(--s7); }
}
.movement { border-top: 1px solid var(--rule); padding-top: var(--s4); }
.movement .num {
  font-family: "JetBrains Mono", ui-monospace, Consolas, monospace;
  font-size: 0.8125rem;
  color: var(--bone-600);
  display: block;
  margin-bottom: var(--s3);
}
.movement p { color: var(--bone-400); font-size: 0.875rem; line-height: 1.55; margin: 0; }
.movement h3 { margin-bottom: var(--s2); }

/* ---------- CTA ---------- */

.cta {
  display: inline-block;
  border: 1px solid var(--copper-dim);
  border-radius: 8px;
  padding: var(--s3) var(--s5);
  color: var(--bone-100);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease);
}
.cta:hover { border-color: var(--copper); }

.plain-btn {
  display: inline-block;
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: var(--s3) var(--s5);
  color: var(--bone-100);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease);
}
.plain-btn:hover { border-color: var(--bone-600); }

.cta-row { display: flex; flex-wrap: wrap; gap: var(--s4); align-items: center; margin-top: var(--s6); }

/* ---------- code blocks ---------- */

pre {
  background: var(--stone-800);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: var(--s4) var(--s5);
  overflow-x: auto;
  margin: 0;
}
pre code { color: var(--bone-200); display: block; white-space: pre; }

.check { margin-top: var(--s7); }
.check h3 { margin-bottom: var(--s2); }
.check .what { color: var(--bone-400); max-width: 68ch; margin: 0 0 var(--s4); }

/* ---------- facts grid (report header data) ---------- */

.facts {
  display: grid;
  gap: 0;
  margin: 0;
  background: var(--stone-700);
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
}
.facts > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px var(--s5);
  padding: var(--s3) var(--s5);
  border-top: 1px solid var(--rule-soft);
}
.facts > div:first-child { border-top: 0; }
.facts dt {
  font-size: 0.75rem;
  font-weight: 560;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--bone-600);
}
.facts dd { margin: 0; word-break: break-word; }
@media (min-width: 640px) {
  .facts > div { grid-template-columns: 13rem minmax(0, 1fr); align-items: baseline; }
}

/* ---------- lifecycle steps ---------- */

.steps { list-style: none; margin: var(--s6) 0 0; padding: 0; }
.steps li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--s4);
  border-top: 1px solid var(--rule);
  padding-block: var(--s5);
  max-width: 76ch;
}
.steps li:last-child { border-bottom: 1px solid var(--rule); }
.steps .num {
  font-family: "JetBrains Mono", ui-monospace, Consolas, monospace;
  font-size: 0.8125rem;
  color: var(--bone-600);
  padding-top: 4px;
}
.steps h3 { margin-bottom: var(--s1); }
.steps p { margin: 0; color: var(--bone-400); font-size: 0.9375rem; line-height: 1.6; }

/* ---------- limitations ---------- */

.limitation {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--s4);
  border-top: 1px solid var(--rule);
  padding-block: var(--s6);
  max-width: 76ch;
}
.limitation:last-of-type { border-bottom: 1px solid var(--rule); }
.limitation .n {
  font-family: "JetBrains Mono", ui-monospace, Consolas, monospace;
  font-size: 0.8125rem;
  color: var(--bone-600);
  padding-top: 4px;
}
.limitation p { margin: 0; color: var(--bone-200); font-size: 1.0625rem; line-height: 1.65; }

/* ---------- dossier index rows ---------- */

.epoch-link { text-decoration: none; }
.epoch-link:hover code { color: var(--bone-100); }
.epoch-link code { transition: color var(--dur) var(--ease); }

/* ---------- misc ---------- */

hr { border: 0; border-top: 1px solid var(--rule); margin: var(--s8) 0 0; }

.note {
  border: 1px solid var(--rule);
  border-radius: 10px;
  background: var(--stone-800);
  padding: var(--s4) var(--s5);
  color: var(--bone-400);
  font-size: 0.875rem;
  line-height: 1.55;
  max-width: 76ch;
}
.note strong { color: var(--bone-200); font-weight: 560; }

blockquote {
  margin: var(--s5) 0;
  padding-left: var(--s5);
  border-left: 2px solid var(--rule);
  color: var(--bone-200);
  max-width: 68ch;
}
blockquote cite { display: block; margin-top: var(--s2); color: var(--bone-600); font-size: 0.875rem; font-style: normal; }