/* Qrypto: archival technical journal, dark edition.
   Two surfaces, one system: a concise product landing (index.html) and a
   long-form illustrated essay (history.html). Near-black / bone / chartreuse. */

:root {
  --bl: 8px;
  --lh: 24px;
  --mobile-text: 16px;
  --margin: 20px;
  --maxw: 1120px;
  --measure: 660px;

  --bg: #111310;
  --bg-deep: #0d0f0c;
  --ink: #f4f2e9;
  --prose: #eeeadf;
  --muted: #b3b8a9;
  --faint: #7d8378; /* metadata only: never sentence-length copy */
  --signal: #ff5a4e; /* evidence + boundary ticks only; chartreuse stays action-only */
  --line: #34382f;
  --line-soft: rgba(52, 56, 47, 0.7);
  --acid: #c8ff38;
  --acid-dim: rgba(200, 255, 56, 0.08);
  --amber: #f7cc78;
  --danger: #ff725c;
  --panel: #191c17;
  --paper: #e9e3d2;
  --paper-ink: #1a1c15;

  --mono: "DM Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --sans: "Manrope", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--lh) * 3);
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font: 400 16px/var(--lh) var(--sans);
  background: var(--bg);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- shared atoms ---------- */

h1, h2, h3, p, ul, ol, dl, figure, figcaption { margin: 0; }

a { color: inherit; }
a:hover { color: var(--acid); }

code {
  font: 400 0.92em var(--mono);
  overflow-wrap: anywhere;
}

em { font-style: normal; text-decoration: underline; text-decoration-color: var(--acid); text-underline-offset: 3px; }
strong { font-weight: 800; }

:focus-visible {
  outline: 2px solid var(--acid);
  outline-offset: 3px;
  border-radius: 0;
}

::selection { background: var(--acid); color: var(--bg); }

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

.skip-link {
  position: absolute;
  top: -100px; left: var(--margin);
  z-index: 10;
  padding: var(--bl) 16px;
  background: var(--acid);
  color: var(--bg);
  font: 600 12px/var(--lh) var(--sans);
  text-decoration: none;
}
.skip-link:focus { top: 0; color: var(--bg); }

.arrow { margin-left: 0.35em; }

/* mono definition rows (release manifest, technical notes) */
.spec-list { display: grid; }
.spec-list > div {
  display: grid;
  grid-template-columns: minmax(112px, 30%) 1fr;
  gap: 16px;
  padding: var(--bl) 0;
  border-bottom: 1px solid var(--line-soft);
}
.spec-list dt {
  color: var(--faint);
  font: 500 11px/18px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-top: 2px;
}
.spec-list dd {
  margin: 0;
  font: 400 13px/20px var(--mono);
  overflow-wrap: anywhere;
}
#release-meta dd[data-tone="ready"] { color: var(--acid); }
#release-meta dd[data-tone="building"] { color: var(--amber); }
#release-meta dd[data-tone="blocked"] { color: var(--danger); }

/* copy buttons */
.copy {
  appearance: none;
  cursor: pointer;
  margin-left: var(--bl);
  padding: 2px 8px;
  border: 1px solid #51564b;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font: 500 12px/18px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 140ms ease, color 140ms ease;
}
.copy:hover { border-color: var(--acid); color: var(--acid); }
.copy.copied { border-color: var(--acid); color: var(--acid); background: var(--acid-dim); }

/* ---------- masthead ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--line);
  background: rgba(17, 19, 16, 0.92);
  backdrop-filter: blur(6px);
}
.masthead-row {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-block: 11px;
}

.wordmark a {
  color: var(--ink);
  font: 800 16px/var(--lh) var(--sans);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
}
.wordmark a::after { content: "_"; color: var(--acid); }

.masthead-nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
}
.masthead-nav a {
  color: var(--muted);
  font: 500 12px/var(--lh) var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
}
.masthead-nav a:hover { color: var(--acid); }

/* ---------- landing hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(var(--margin), 1fr) minmax(0, 560px) minmax(0, 600px) minmax(0, 1fr);
  align-items: center;
}

.hero-copy {
  grid-column: 2;
  padding-block: calc(var(--lh) * 3);
  padding-right: clamp(24px, 4vw, 72px);
}

.display {
  font-size: clamp(48px, 7vw, 104px);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: -0.05em;
  text-wrap: balance;
}

.lede {
  max-width: 30em;
  margin-top: calc(var(--lh) * 0.75);
  color: var(--prose);
  font: 500 20px/1.5 var(--serif);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: stretch;
  margin-top: var(--lh);
}

.nojs-note {
  max-width: 34em;
  color: var(--muted);
  font: 400 16px/24px var(--sans);
}

.no-js #cta-pending {
  display: none;
}

.cta {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  border: 1px solid transparent;
  font: 600 14px/var(--lh) var(--sans);
  text-decoration: none;
  transition: 140ms ease;
}
.cta-primary {
  background: var(--acid);
  border-color: var(--acid);
  color: var(--bg);
}
a.cta-primary:hover { background: #dcff7d; color: var(--bg); transform: translateY(-1px); }
.cta-primary.is-pending {
  background: transparent;
  border: 1px dashed #51564b;
  color: var(--muted);
  cursor: default;
}
.cta-primary.is-pending[data-tone="building"] { border-color: var(--amber); color: var(--amber); }
.cta-primary.is-pending[data-tone="blocked"] { border-color: var(--danger); color: #ffb3a7; }

.hero-art {
  grid-column: 3 / 5;
  align-self: stretch;
}
.hero-art img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 440px;
  object-fit: cover;
}

/* ---------- landing sections ---------- */

.section {
  padding-block: calc(var(--lh) * 1.75) calc(var(--lh) * 2);
}
.section-ruled { border-top: 1px solid var(--line); }

.section-h {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  text-wrap: balance;
  max-width: 640px;
}

.section-lede {
  max-width: 640px;
  margin-top: calc(var(--lh) * 0.5);
  color: var(--muted);
  font-size: 16px;
  line-height: 24px;
}
.section-lede a { color: var(--ink); }

.thesis-link-line { margin-top: calc(var(--lh) * 0.75); }
.thesis-link {
  color: var(--muted);
  font: 500 13px/20px var(--mono);
  letter-spacing: 0.04em;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}
.thesis-link:hover { color: var(--acid); border-color: var(--acid); }

/* ---------- configured wallet capture ---------- */

.showcase-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  column-gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.showcase-copy p {
  max-width: 540px;
  margin-top: calc(var(--lh) * 0.66);
  font: 500 18px/1.65 var(--serif);
  color: var(--prose);
}
.showcase-copy .section-h + p { margin-top: calc(var(--lh) * 0.75); }

.showcase-handoff a {
  color: var(--ink);
  font: 500 13px/20px var(--mono);
  letter-spacing: 0.04em;
  text-decoration: none;
  border-bottom: 1px solid var(--acid);
  padding-bottom: 2px;
}
.showcase-handoff a:hover { color: var(--acid); }

.wallet-capture {
  justify-self: end;
  width: min(100%, 400px);
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 8px;
}
.wallet-capture img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- about ---------- */

.about-diagram { max-width: 980px; margin-top: calc(var(--lh) * 1.25); }
.about-diagram img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

.about-prose { max-width: 660px; }
.about-prose p {
  margin-top: calc(var(--lh) * 0.66);
  font: 500 18px/1.65 var(--serif);
  color: var(--prose);
}
.about-prose p a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: rgba(200, 255, 56, 0.55);
  text-underline-offset: 3px;
}
.about-prose p a:hover { color: var(--acid); text-decoration-color: var(--acid); }

.about-prose .gas-line {
  max-width: 620px;
  margin-top: calc(var(--lh) * 0.85);
  padding-left: 14px;
  border-left: 2px solid var(--acid);
  color: var(--muted);
  font: 500 13px/21px var(--mono);
  letter-spacing: 0.02em;
}
.about-prose .fine-line {
  max-width: 620px;
  margin-top: calc(var(--lh) * 0.85);
  color: var(--muted);
  font: 400 13px/21px var(--mono);
  letter-spacing: 0.02em;
}

/* ---------- disclosures ---------- */

.disclosure {
  max-width: 720px;
  border-top: 1px solid var(--line-soft);
}
.disclosure:last-of-type { border-bottom: 1px solid var(--line-soft); }
.disclosure summary {
  cursor: pointer;
  padding: 12px 0;
  font: 500 13px/20px var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  list-style: none;
}
.disclosure summary::-webkit-details-marker { display: none; }
.disclosure summary::before { content: "+ "; color: var(--acid); }
.disclosure[open] summary::before { content: "− "; }
.disclosure summary:hover { color: var(--acid); }
.disclosure > *:not(summary) { margin: 0 0 16px; }
.disclosure p {
  color: var(--muted);
  font: 400 15px/24px var(--sans);
  max-width: 680px;
}
.disclosure p a { color: var(--ink); }
.disclosure .spec-list { margin-bottom: 12px; }

.disclosure-links { display: grid; gap: 6px; }
.disclosure-links a {
  color: var(--muted);
  font: 500 13px/20px var(--mono);
  letter-spacing: 0.04em;
  text-decoration: none;
}
.disclosure-links a:hover { color: var(--acid); }

/* ---------- install ---------- */

.steps {
  list-style: none;
  margin-top: var(--lh);
  padding: 0;
  counter-reset: step;
  max-width: 680px;
}
.steps > li {
  counter-increment: step;
  padding: 10px 0;
}
.steps h3 {
  font-size: 16px;
  font-weight: 800;
  line-height: 24px;
}
.steps h3::before {
  content: counter(step, decimal-leading-zero) ". ";
  color: var(--acid);
  font: 500 14px/24px var(--mono);
}
.steps p {
  margin-top: 2px;
  color: var(--muted);
  font: 400 16px/24px var(--sans);
}
.steps p a { color: var(--ink); }
.steps code { color: var(--ink); background: var(--panel); padding: 1px 5px; }

.release-line {
  margin-top: var(--lh);
  color: var(--muted);
  font: 400 13px/20px var(--mono);
  letter-spacing: 0.03em;
  overflow-wrap: anywhere;
}

.browser-addresses {
  display: grid;
  gap: 4px;
  padding: 0;
  list-style: none;
}
.browser-addresses li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--bl);
  color: var(--muted);
  font: 500 13px/20px var(--mono);
}
.browser-addresses code { overflow-wrap: anywhere; }
.browser-addresses .copy { margin-left: 0; }

.preview-boundary {
  max-width: 680px;
  margin-top: calc(var(--lh) * 1.5);
  padding-left: 16px;
  border-left: 2px solid var(--signal);
  color: var(--muted);
  font: 400 16px/25px var(--sans);
}

/* ---------- essay: head ---------- */

.essay { padding-bottom: calc(var(--lh) * 2); }

.essay-head {
  max-width: 920px;
  margin-inline: auto;
  padding: calc(var(--lh) * 2.25) var(--margin) calc(var(--lh) * 1.5);
}

.essay-title {
  margin-top: calc(var(--lh) * 0.75);
  font: 500 clamp(42px, 7vw, 84px)/1.02 var(--serif);
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: balance;
}

.deck {
  margin-top: var(--lh);
  max-width: 33em;
  font: italic 400 clamp(18px, 2.2vw, 22px)/1.5 var(--serif);
  color: var(--muted);
}

/* ---------- essay: chapters ---------- */

.chapter {
  display: grid;
  grid-template-columns: minmax(0, 190px) minmax(0, var(--measure));
  justify-content: center;
  column-gap: clamp(32px, 5vw, 64px);
  padding: calc(var(--lh) * 1.75) var(--margin) 0;
  max-width: 1080px;
  margin-inline: auto;
}

.era {
  grid-column: 1;
  grid-row: 1;
  text-align: right;
  border-top: 2px solid var(--acid);
  background: var(--bg);
  padding-top: 6px;
  position: sticky;
  top: calc(var(--lh) * 3.5);
  z-index: 1;
  align-self: start;
}
.chapter .era-year {
  font: 800 clamp(30px, 3.4vw, 44px)/1 var(--sans);
  letter-spacing: -0.04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.chapter .era-sub {
  margin-top: 4px;
  color: var(--faint);
  font: 500 10px/16px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.chapter-body { grid-column: 2; grid-row: 1; }
.chapter-cont { grid-column: 2; }

.chapter h2 {
  font: 800 clamp(21px, 2.6vw, 27px)/1.15 var(--sans);
  letter-spacing: -0.025em;
  color: var(--ink);
  text-wrap: balance;
}

.chapter p {
  margin-top: calc(var(--lh) * 0.66);
  font: 500 18px/1.65 var(--serif);
  color: var(--prose);
}
.chapter p a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: rgba(200, 255, 56, 0.55);
  text-underline-offset: 3px;
}
.chapter p a:hover { color: var(--acid); text-decoration-color: var(--acid); }
.chapter p em { font-style: italic; text-decoration: none; }

.opener::first-letter {
  float: left;
  font: 500 3.4em/0.82 var(--serif);
  padding: 6px 10px 0 0;
  color: var(--acid);
}

/* ---------- essay: plates ---------- */

.plate {
  grid-column: 2;
  justify-self: center;
  width: 100%;
  max-width: 780px;
  margin-top: calc(var(--lh) * 1.25);
}
.plate-frame {
  background: var(--paper);
  padding: clamp(14px, 2.6vw, 34px);
}
.plate-frame img {
  display: block;
  width: 100%;
  height: auto;
}
.plate-portrait .plate-frame {
  display: flex;
  justify-content: center;
}
.plate-portrait .plate-frame img {
  width: auto;
  max-width: 100%;
  max-height: 680px;
}
.plate figcaption,
.swarm figcaption {
  margin-top: 10px;
  max-width: var(--measure);
  color: var(--muted); /* captions carry sentence copy; faint stays metadata-only */
  font: 400 11.5px/18px var(--mono);
  letter-spacing: 0.02em;
}
.plate figcaption a,
.swarm figcaption a {
  color: var(--muted);
}
.plate figcaption a:hover,
.swarm figcaption a:hover { color: var(--acid); }

/* ---------- essay: Bernstein case file ---------- */

.casefile {
  grid-column: 2;
  justify-self: center;
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 780px;
  margin-top: calc(var(--lh) * 1.25);
  background: var(--paper);
  color: var(--paper-ink);
  padding: clamp(24px, 4vw, 44px) clamp(20px, 4.5vw, 52px);
}
.chapter .casefile p { color: var(--paper-ink); }
.casefile ::selection {
  background: var(--paper-ink);
  color: #fff;
}
.casefile-head {
  text-align: center;
  border-bottom: 3px double var(--paper-ink);
  padding-bottom: 18px;
}
.casefile-court {
  font: 500 10px/16px var(--mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.casefile-title {
  margin-top: 10px;
  font: 500 clamp(20px, 2.6vw, 26px)/1.2 var(--serif);
  letter-spacing: -0.01em;
}
.casefile-docket {
  margin-top: 6px;
  font: 500 10px/16px var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(26, 28, 21, 0.65);
}
.chapter .casefile .casefile-docket { color: rgba(26, 28, 21, 0.65); }
.casefile-rows { display: grid; margin: 0; }
.casefile-rows > div {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(26, 28, 21, 0.22);
}
.casefile-rows > div:last-child { border-bottom: 0; }
.casefile-rows dt {
  font: 500 11px/19px var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.casefile-rows dd {
  margin: 0;
  font: 400 15px/1.5 var(--serif);
}
.casefile-rows dd a {
  color: var(--paper-ink);
  font: 500 11px/16px var(--mono);
  letter-spacing: 0.04em;
  text-decoration: underline;
  text-underline-offset: 2px;
  white-space: nowrap;
  margin-left: 6px;
}
.casefile-rows dd a:hover { color: #3c4416; }

/* ---------- essay: swarm field (17,600 actions) ---------- */

.swarm {
  grid-column: 2;
  justify-self: center;
  width: 100%;
  max-width: 780px;
  margin-top: calc(var(--lh) * 1.25);
}
.swarm-field {
  position: relative;
  height: 200px;
  border: 1px solid var(--line);
  background: var(--bg-deep);
  overflow: hidden;
}
.swarm-rows {
  position: absolute;
  inset: 10px 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.swarm-row {
  height: 22px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(244, 242, 233, 0.55) 0 1px,
    transparent 1px 4px
  );
  -webkit-mask-image: linear-gradient(90deg,
    rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.7) 13%,
    rgba(0, 0, 0, 0.2) 23%, rgba(0, 0, 0, 0.24) 37%,
    rgba(0, 0, 0, 1) 47%, rgba(0, 0, 0, 0.92) 56%,
    rgba(0, 0, 0, 0.5) 67%, rgba(0, 0, 0, 0.42) 79%,
    rgba(0, 0, 0, 0.26) 90%, rgba(0, 0, 0, 0.16) 100%);
  mask-image: linear-gradient(90deg,
    rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.7) 13%,
    rgba(0, 0, 0, 0.2) 23%, rgba(0, 0, 0, 0.24) 37%,
    rgba(0, 0, 0, 1) 47%, rgba(0, 0, 0, 0.92) 56%,
    rgba(0, 0, 0, 0.5) 67%, rgba(0, 0, 0, 0.42) 79%,
    rgba(0, 0, 0, 0.26) 90%, rgba(0, 0, 0, 0.16) 100%);
}
.swarm-row:nth-child(1) { opacity: 0.85; }
.swarm-row:nth-child(2) { opacity: 0.55; background-position-x: 2px; }
.swarm-row:nth-child(3) { opacity: 0.75; background-position-x: 1px; }
.swarm-row:nth-child(4) { opacity: 0.45; background-position-x: 3px; }
.swarm-row:nth-child(5) { opacity: 0.68; background-position-x: 2px; }
.swarm-row:nth-child(6) { opacity: 0.5; background-position-x: 1px; }

.swarm-chain {
  position: absolute;
  left: 2%;
  right: 4%;
  top: 55%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--acid) 7%, var(--acid));
  transform: rotate(-3deg);
}
.swarm-chain::after {
  content: "";
  position: absolute;
  right: -3px;
  top: -3px;
  width: 8px;
  height: 8px;
  background: var(--acid);
}

.swarm-axis {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  padding-top: 5px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font: 500 10px/16px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- essay: close ---------- */

.chapter-final { padding-bottom: calc(var(--lh) * 1.5); }

.essay-return { margin-top: calc(var(--lh) * 1.25); }
.essay-return a {
  font: 500 13px/22px var(--mono);
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--acid);
  padding-bottom: 3px;
}
.essay-return a:hover { color: var(--acid); }

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

.footer { border-top: 1px solid var(--line); padding-block: calc(var(--lh) * 1.25); }
.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--bl) 24px;
}

.footer-brand {
  font: 800 14px/var(--lh) var(--sans);
  text-transform: uppercase;
}
.footer-brand::after { content: "_"; color: var(--acid); }

.footer-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--bl) 20px;
}
.footer-links a {
  color: var(--muted);
  font: 500 13px/var(--lh) var(--mono);
  letter-spacing: 0.06em;
  text-decoration: none;
}
.footer-links a:hover { color: var(--acid); }

.footer-note {
  flex-basis: 100%;
  color: var(--faint);
  font: 500 10px/16px var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ---------- responsive ---------- */

@media (max-width: 979px) {
  .hero {
    display: block;
    padding-inline: var(--margin);
  }
  .hero-copy {
    padding-block: calc(var(--lh) * 1.75) calc(var(--lh) * 1.25);
    padding-right: 0;
    max-width: 640px;
  }
  .hero-art {
    margin-inline: calc(-1 * var(--margin));
  }
  .hero-art img { min-height: 0; height: auto; }
  .showcase-wrap { display: block; }
  .wallet-capture { margin-top: var(--lh); }
}

@media (max-width: 879px) {
  .chapter { grid-template-columns: 1fr; }
  .era {
    position: static;
    grid-column: 1;
    grid-row: auto;
    display: flex;
    align-items: baseline;
    gap: 12px;
    text-align: left;
    margin-bottom: 12px;
  }
  .chapter-body, .chapter-cont { grid-column: 1; }
  .plate, .casefile, .swarm { grid-column: 1; }
  .chapter .era-year { font-size: 28px; }
  .chapter .era-sub { margin-top: 0; }
  .casefile-rows > div { grid-template-columns: 1fr; gap: 4px; }
  .swarm-field { height: 150px; }
  .swarm-row { height: 16px; }
}

@media (max-width: 759px) {
  .section { padding-block: calc(var(--lh) * 1.25) calc(var(--lh) * 1.5); }

  /* mobile readability floor: all visitor-facing landing text is at least 16px */
  .section-lede,
  .steps p,
  .disclosure p,
  .preview-boundary { font-size: 16px; line-height: 25px; }

  .masthead-nav { gap: 12px; }

  .masthead-nav a,
  .copy,
  .spec-list dt,
  .spec-list dd,
  .thesis-link,
  .showcase-handoff a,
  .wallet-address,
  .wallet-net,
  .wallet-note,
  .gas-line,
  .fine-line,
  .disclosure summary,
  .disclosure-links a,
  .steps h3::before,
  .release-line,
  .browser-addresses li,
  .footer-links a {
    font-size: var(--mobile-text);
    line-height: 24px;
    letter-spacing: 0.03em;
  }

  .browser-addresses li {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 6px 8px;
  }
  .browser-addresses li > span { grid-column: 1 / -1; }
}

/* ---------- motion discipline ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  a.cta-primary:hover { transform: none; }
  .era { position: static; }
}