:root {
  color-scheme: dark;
  --paper: #0d100e;
  --paper-deep: #171a16;
  --ink: #f3ead8;
  --muted: #aaa294;
  --line: rgba(243, 234, 216, 0.18);
  --accent: #b9f34a;
  --accent-dark: #b9f34a;
  --panel: #f3ead8;
  --panel-ink: #11130f;
  --signal-panel: #090c0a;
  --danger: #ff5d57;
  --max-width: 1440px;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --serif: Impact, Haettenschweiler, "Arial Narrow Bold", "Arial Narrow", sans-serif;
  --sans: "Arial Narrow", "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  overflow-x: clip;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background:
    linear-gradient(rgba(185, 243, 74, 0.04) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(90deg, rgba(185, 243, 74, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
main > section,
footer {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  min-height: 6.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 16, 14, 0.94);
  backdrop-filter: blur(14px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.wordmark-mark {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--signal-panel);
  color: var(--accent);
  font-size: 0.85rem;
}

nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
}

nav a {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--accent);
}

nav a:hover,
.text-link:hover,
.repo-link:hover {
  text-decoration-thickness: 2px;
  text-underline-offset: 0.35em;
}

.hero {
  min-height: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
  padding-block: clamp(2rem, 4vw, 4rem);
}

.eyebrow {
  margin: 0 0 1.5rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.method h2,
.status h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 0.9;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 16ch;
  font-size: clamp(2.8rem, 4.5vw, 4.6rem);
}

.hero h1 em {
  color: var(--accent);
  font-style: normal;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.1em;
}

.hero-summary {
  max-width: 39rem;
  margin: 2.25rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.3vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2rem;
  align-items: center;
  margin-top: 2.5rem;
}

.button {
  display: inline-flex;
  min-height: 3.25rem;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.2rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
}

.button-primary {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--panel-ink);
}

.button-primary:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.text-link,
.repo-link {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-underline-offset: 0.25em;
  text-transform: uppercase;
}

.instrument {
  align-self: center;
  border: 1px solid rgba(243, 234, 216, 0.26);
  background: var(--signal-panel);
  color: var(--ink);
  box-shadow: 1.1rem 1.1rem 0 rgba(185, 243, 74, 0.9);
}

.instrument-head,
.instrument-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.instrument-head {
  border-bottom: 1px solid #44473f;
}

.live-label {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
}

.live-label i {
  width: 0.45rem;
  height: 0.45rem;
  background: var(--accent);
}

.instrument-body {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  min-height: 20rem;
}

.source-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-around;
  border-right: 1px solid #44473f;
  color: #898d82;
  font-family: var(--mono);
  font-size: 0.58rem;
}

.signal-plot {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.plot-grid path {
  fill: none;
  stroke: #2c2f29;
  stroke-width: 1;
}

.plot-lines path {
  fill: none;
  stroke: #858a7e;
  stroke-width: 2;
}

.plot-lines .plot-output {
  stroke: var(--accent);
  stroke-width: 4;
}

.plot-node {
  fill: var(--accent);
}

.plot-x {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 4.2rem;
  font-style: italic;
}

.plot-note {
  fill: #8f9389;
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.07em;
}

.instrument-foot {
  gap: 1rem;
  justify-content: flex-start;
  border-top: 1px solid #44473f;
  color: #a2a69a;
}

.instrument-foot span:not(:last-child)::after {
  content: " /";
  color: var(--accent);
}

.boundary {
  max-width: none;
  border-block: 1px solid var(--line);
  background: var(--panel);
  color: var(--panel-ink);
}

.boundary p {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 1rem var(--gutter);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.hero-status {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 36rem;
  margin: 2.5rem 0 0;
  border: 1px solid var(--line);
}

.hero-status div {
  padding: 0.85rem 1rem;
}

.hero-status div + div {
  border-left: 1px solid var(--line);
}

.hero-status dt,
.hero-status dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.67rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.hero-status dt {
  color: var(--muted);
}

.hero-status dd {
  margin-top: 0.35rem;
  color: var(--accent);
  font-weight: 700;
}

.signal-radio {
  display: grid;
  grid-template-columns: minmax(18rem, 0.85fr) minmax(22rem, 1.15fr);
  gap: 1.25rem 3rem;
  margin-block: clamp(4rem, 8vw, 8rem);
  padding-block: clamp(2rem, 4vw, 3.5rem);
  background: var(--panel);
  color: var(--panel-ink);
  box-shadow: 0.8rem 0.8rem 0 var(--accent);
}

.radio-header {
  grid-row: span 3;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 3rem;
  border-right: 1px solid rgba(17, 19, 15, 0.22);
  padding-right: 3rem;
}

.radio-header h2 {
  max-width: 12ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 5vw, 5.4rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 0.9;
  text-transform: uppercase;
}

.radio-status {
  align-self: flex-start;
  padding: 0.5rem 0.65rem;
  background: var(--panel-ink);
  color: var(--panel);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

body[data-radio="playing"] .radio-status {
  background: var(--accent);
  color: var(--panel-ink);
}

.radio-readout {
  min-width: 0;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(17, 19, 15, 0.22);
}

.signal-bars {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0.35rem;
  height: 3.5rem;
  align-items: end;
  margin-bottom: 1rem;
}

.signal-bars span {
  height: 18%;
  background: var(--panel-ink);
  transform-origin: bottom;
}

body[data-radio="playing"] .signal-bars span {
  animation: signal-meter 780ms steps(4, end) infinite alternate;
}

.signal-bars span:nth-child(2n) { animation-delay: -180ms; }
.signal-bars span:nth-child(3n) { animation-delay: -360ms; }
.signal-bars span:nth-child(5n) { animation-delay: -540ms; }

.radio-title-line,
.radio-mode,
.radio-footnote {
  margin: 0;
}

.radio-title-line {
  font-family: var(--serif);
  font-size: clamp(1.55rem, 2.4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1;
  text-transform: uppercase;
}

.radio-mode,
.radio-footnote {
  margin-top: 0.55rem;
  color: rgba(17, 19, 15, 0.66);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.radio-field,
.radio-sliders label {
  display: grid;
  gap: 0.45rem;
  font-family: var(--mono);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.radio-field select,
.radio-controls button {
  min-height: 3.15rem;
  border: 1px solid rgba(17, 19, 15, 0.35);
  border-radius: 0;
  background: transparent;
  color: var(--panel-ink);
  font: inherit;
}

.radio-field select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-family: var(--mono);
  font-size: 0.78rem;
}

.radio-controls {
  display: grid;
  grid-template-columns: 1fr 1.25fr 1fr;
  gap: 0.5rem;
}

.radio-controls button {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.radio-controls #radio-play {
  border-color: var(--panel-ink);
  background: var(--panel-ink);
  color: var(--panel);
}

.radio-controls button:hover,
.radio-controls button:focus-visible {
  background: var(--accent);
  color: var(--panel-ink);
}

.radio-modes,
.radio-sliders {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.radio-modes label {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  gap: 0.65rem;
  padding: 0 0.75rem;
  border: 1px solid rgba(17, 19, 15, 0.22);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.radio-modes input,
.radio-sliders input {
  accent-color: var(--panel-ink);
}

.radio-footnote {
  grid-column: 2;
  padding-top: 0.25rem;
}

@keyframes signal-meter {
  0% { height: 16%; }
  50% { height: 92%; }
  100% { height: 42%; }
}

.implementations {
  padding-block: clamp(6rem, 10vw, 10rem);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.45fr);
  gap: 1rem 4rem;
  margin-bottom: clamp(4rem, 7vw, 7rem);
}

.section-heading .eyebrow {
  grid-column: 1 / -1;
}

.section-heading h2,
.method h2,
.status h2 {
  font-size: clamp(2.8rem, 5vw, 5.5rem);
}

.section-heading > p:last-child {
  align-self: end;
  max-width: 32rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.1rem;
}

.implementation {
  display: grid;
  grid-template-columns: 4rem minmax(16rem, 1.2fr) minmax(14rem, 0.6fr) auto;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
  border-top: 1px solid var(--line);
}

.implementation:last-child {
  border-bottom: 1px solid var(--line);
}

.implementation-index,
.chain-label,
.facts dt,
.status-date {
  font-family: var(--mono);
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.implementation-index {
  color: var(--accent-dark);
  font-weight: 700;
}

.implementation-title h3 {
  max-width: 15ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 3vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 0.95;
  text-transform: uppercase;
}

.chain-label {
  margin: 0 0 0.65rem;
  font-weight: 700;
}

.implementation-main > p {
  max-width: 40rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.facts {
  margin: 0;
}

.facts div {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--line);
}

.facts dt {
  color: var(--muted);
}

.facts dd {
  margin: 0;
  text-align: right;
}

.repo-link {
  white-space: nowrap;
}

.method {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(26rem, 1fr);
  gap: clamp(4rem, 10vw, 10rem);
  padding-block: clamp(6rem, 11vw, 11rem);
}

.method-intro {
  position: sticky;
  top: 2rem;
  align-self: start;
}

.method-intro > p:last-child {
  max-width: 34rem;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: 1.1rem;
}

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

.method-steps li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.5rem;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
}

.method-steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.step-number {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
}

.method-steps h3 {
  margin: -0.2rem 0 0.65rem;
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.015em;
  text-transform: uppercase;
}

.method-steps p {
  max-width: 34rem;
  margin: 0;
  color: var(--muted);
}

.status {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.65fr);
  gap: clamp(3rem, 8vw, 9rem);
  padding-block: clamp(5rem, 9vw, 8rem);
  border-top: 1px solid var(--line);
}

.status-copy p {
  margin: 0 0 1.5rem;
  font-size: 1.05rem;
}

.status-copy .status-date {
  margin-top: 3rem;
  color: var(--muted);
  font-size: 0.62rem;
}

.public-good-home {
  display: grid;
  grid-template-columns: minmax(15rem, 0.65fr) minmax(0, 1fr);
  gap: clamp(3rem, 9vw, 10rem);
  align-items: start;
  margin-block: clamp(4rem, 8vw, 8rem);
  padding-block: clamp(4rem, 8vw, 7rem);
  background: var(--panel);
  color: var(--panel-ink);
}

.public-good-number {
  display: flex;
  flex-direction: column;
  font-family: var(--mono);
  text-transform: uppercase;
}

.public-good-number small {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.public-good-number strong {
  color: var(--panel-ink);
  font-family: var(--serif);
  font-size: clamp(9rem, 21vw, 20rem);
  font-weight: 800;
  letter-spacing: -0.08em;
  line-height: 0.75;
}

.public-good-copy h2 {
  max-width: 14ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3rem, 6vw, 6.8rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 0.9;
  text-transform: uppercase;
}

.public-good-copy > p:not(.eyebrow) {
  max-width: 43rem;
  margin: 2rem 0 0;
  font-size: 1.12rem;
}

.public-good-copy .cost-note {
  padding-left: 1rem;
  border-left: 4px solid var(--panel-ink);
  color: rgba(17, 19, 15, 0.68);
}

footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 2rem;
  align-items: center;
  min-height: 9rem;
  border-top: 1px solid var(--line);
  background: var(--signal-panel);
  color: var(--ink);
}

footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.footer-wordmark .wordmark-mark {
  border: 1px solid #44473f;
}

@media (max-width: 1050px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .instrument {
    width: min(100%, 46rem);
  }

  .signal-radio {
    grid-template-columns: 1fr;
  }

  .radio-header {
    grid-row: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(17, 19, 15, 0.22);
    padding: 0 0 1.5rem;
  }

  .radio-footnote {
    grid-column: 1;
  }

  .implementation {
    grid-template-columns: 3rem 1fr minmax(13rem, 0.55fr);
  }

  .repo-link {
    grid-column: 2;
  }
}

@media (max-width: 760px) {
  :root {
    --gutter: 1.15rem;
  }

  .site-header {
    min-height: 5.5rem;
  }

  .site-header { flex-wrap: wrap; gap: .5rem 1rem; padding-block: 1rem; }
  nav { flex-wrap: wrap; gap: .75rem 1rem; }
  nav a:not(:first-child):not(.nav-islands) {
    display: none;
  }

  .hero {
    min-height: auto;
    gap: 2rem;
    padding-block: 2rem 3rem;
  }

  .hero h1 {
    font-size: clamp(2.7rem, 11vw, 4rem);
  }

  .instrument {
    width: calc(100% - 0.65rem);
    box-shadow: 0.65rem 0.65rem 0 var(--accent);
  }

  .instrument-body {
    min-height: 15rem;
  }

  .instrument-foot {
    flex-wrap: wrap;
  }

  .section-heading,
  .method,
  .status,
  .public-good-home {
    grid-template-columns: 1fr;
  }

  .section-heading {
    gap: 2rem;
  }

  .section-heading .eyebrow {
    margin-bottom: 0;
  }

  .implementation {
    grid-template-columns: 2.25rem 1fr;
    gap: 1.25rem;
  }

  .implementation-main,
  .facts,
  .repo-link {
    grid-column: 2;
  }

  .method {
    gap: 4rem;
  }

  .method-intro {
    position: static;
  }

  .public-good-home {
    gap: 4rem;
  }

  .public-good-number {
    min-height: 8rem;
  }

  .public-good-number strong {
    font-size: 9rem;
  }

  .signal-radio {
    width: calc(100% - 0.65rem);
    gap: 1.25rem;
    box-shadow: 0.65rem 0.65rem 0 var(--accent);
  }

  .radio-header {
    gap: 1.5rem;
  }

  .radio-controls,
  .radio-modes,
  .radio-sliders {
    grid-template-columns: 1fr;
  }

  .hero-status {
    grid-template-columns: 1fr;
  }

  .hero-status div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  footer {
    grid-template-columns: 1fr;
    align-items: start;
    padding-block: 2.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .signal-bars span,
  body[data-radio="playing"] .signal-bars span {
    animation: none;
  }
}

.quickstart { min-width: 0; padding: clamp(1.25rem, 3vw, 2rem); border: 1px solid var(--accent); }
.quickstart h2 { margin: 0; font-size: 1.8rem; }
.quickstart .eyebrow { color: var(--accent); margin-bottom: .75rem; }
.quickstart pre { overflow-x: auto; padding: 1rem; background: #10120e; color: var(--accent); font-size: 1rem; }
.quickstart p { overflow-wrap: anywhere; }
.quickstart a { text-decoration: underline; text-underline-offset: .2em; }
.quickstart button { min-height: 44px; padding: .5rem 1rem; border: 1px solid var(--accent); background: var(--accent); color: #171914; cursor: pointer; }
.quickstart .release-links { font-size: .85rem; margin-bottom: 0; }

/* Compact, opt-in music controls above the integration content. */
.home-page .signal-radio { position: relative; display: grid; grid-template-columns: auto auto minmax(0, 1fr) 8rem auto; align-items: center; margin-block: 1rem 0; padding: .6rem .8rem; gap: .75rem; box-shadow: none; }
.home-page .signal-radio h2 { margin: 0; font-size: 1rem; }
.home-page .radio-controls { grid-column: auto; grid-template-columns: repeat(3, auto); gap: .3rem; }
.home-page .radio-controls button { min-height: 44px; padding: .35rem .6rem; }
.home-page .radio-field { min-width: 0; }
.home-page .radio-field select { min-height: 44px; font-size: .7rem; padding: .3rem; }
.radio-volume { display: grid; gap: .25rem; font-size: .7rem; }
.radio-volume input { min-width: 0; width: 100%; accent-color: var(--panel-ink); }
.radio-extra summary { cursor: pointer; padding: .75rem .25rem; }
.radio-extra[open] { grid-column: 1 / -1; }
.radio-extra[open] summary { margin-bottom: .5rem; }
.radio-extra .radio-status { display: inline-block; }
.radio-extra .radio-title-line { font-size: 1rem; margin: .6rem 0; }
.radio-extra .radio-modes { max-width: 22rem; margin-block: .6rem; }
.radio-extra > .radio-field { max-width: 22rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
@media (max-width: 760px) {
  .home-page .signal-radio { grid-template-columns: auto minmax(0, 1fr) auto; gap: .5rem; }
  .home-page .signal-radio h2 { display: none; }
  .home-page .radio-controls { grid-column: 1; grid-row: 1; }
  .home-page .radio-field { grid-column: 2; grid-row: 1; }
  .home-page .radio-extra { grid-column: 3; grid-row: 1; }
  .home-page .radio-extra[open] { grid-column: 1 / -1; grid-row: 3; }
  .home-page .radio-volume { grid-column: 1 / -1; grid-row: 2; grid-template-columns: auto 1fr; align-items: center; gap: .75rem; }
}

.use-cases { padding-block: 2rem; border-block: 1px solid var(--line); }
.use-cases h2 { margin-top: 0; font-size: 1.8rem; }
.use-cases p { max-width: 56rem; }
.example-note { color: var(--muted); }
.hero h1 { font-size: clamp(2.6rem, 4vw, 4rem); line-height: 1; }

/* Visitor overview, worked example, then integration. */
.home-page .hero { display: block; padding-block: 2.5rem; }
.home-page .hero h1 { max-width: none; font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.08; text-transform: none; }
.home-page .hero .eyebrow { margin-bottom: .6rem; }
.home-page .hero-summary { margin: 1rem 0; max-width: 52rem; font-size: 1.45rem; color: var(--ink); }
.intro-copy { max-width: 54rem; font-size: 1.05rem; color: var(--muted); }
.availability { font-size: .9rem; }
.availability strong { color: var(--accent); }
.home-page .hero-actions { margin-top: 1.25rem; }
.price-example, .build-section { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 2.5rem; padding-block: 2rem; border-top: 1px solid var(--line); }
.price-example h2, .build-section h2, .practical-info h2 { margin: 0 0 1rem; font-size: 1.8rem; line-height: 1.2; }
.price-example p, .build-section p, .practical-info p { max-width: 54rem; }
.example-controls { min-width: 0; padding: 1.25rem; border: 1px solid var(--accent); }
.example-controls > label { display: grid; gap: .6rem; margin-bottom: 1rem; }
.example-controls select, .example-controls button { min-height: 44px; padding: .5rem; background: var(--panel); color: var(--panel-ink); border: 1px solid var(--line); font: inherit; }
.example-controls input { width: 100%; accent-color: var(--accent); }
.example-totals { margin-block: 1rem; }
.example-totals div + div { margin-top: 1rem; }
.example-totals dt { color: var(--muted); font-size: .85rem; }
.example-totals dd { margin: .3rem 0; overflow-wrap: anywhere; font-family: var(--mono); font-size: clamp(1rem, 2vw, 1.5rem); }
#example-total { color: var(--accent); }
#example-status { font-size: .85rem; color: var(--muted); }
.example-controls summary, .practical-info summary { cursor: pointer; padding-block: .6rem; }
.example-prices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.example-prices dd { margin: .3rem 0 0; overflow-wrap: anywhere; font-family: var(--mono); font-size: .85rem; }
.integration-paths { margin: 0; padding-left: 1.25rem; }
.integration-paths li + li { margin-top: 1.5rem; }
.integration-paths h3 { margin: 0; font-size: 1.2rem; }
.practical-info { padding-block: 2rem 3rem; border-top: 1px solid var(--line); }
.program-address { overflow-wrap: anywhere; font-family: var(--mono); }
.next-chain { margin-top: 2rem; color: var(--muted); }
@media (max-width: 760px) {
  .price-example, .build-section { grid-template-columns: 1fr; gap: 1rem; }
  .home-page .hero { padding-block: 1.5rem; }
  .home-page .hero-summary { font-size: 1.25rem; }
  .example-controls { padding: 1rem; }
}

.nav-islands { color: var(--accent); }
.button-islands { border: 1px solid var(--accent); color: var(--accent); }
.button-islands:hover, .button-islands:focus-visible { background: var(--accent); color: var(--panel-ink); }