:root,
[data-theme="dark"] {
  --rk-bg: #0d0f0f;
  --rk-bg-raised: #141717;
  --rk-bg-soft: #191d1d;
  --rk-panel: #1e2222;
  --rk-text: #eee9dc;
  --rk-muted: #a9aaa3;
  --rk-faint: #6f7472;
  --rk-sand: #d9cf9d;
  --rk-sand-dark: #8f7959;
  --rk-green: #8dff58;
  --rk-green-dim: #4ea432;
  --rk-steel: #3d4545;
  --rk-border: #313737;
  --rk-warning: #e7b76b;
  --rk-error: #df7b6e;
  --rk-shadow: 0 24px 70px rgb(0 0 0 / 36%);
  --rk-radius: 2px;
  --pico-font-family:
    system-ui, -apple-system, blinkmacsystemfont, "Segoe UI", sans-serif;
  --pico-background-color: var(--rk-bg);
  --pico-color: var(--rk-text);
  --pico-muted-color: var(--rk-muted);
  --pico-primary: var(--rk-green);
  --pico-primary-hover: #b0ff8c;
  --pico-primary-focus: rgb(141 255 88 / 30%);
  --pico-card-background-color: var(--rk-bg-raised);
  --pico-card-border-color: var(--rk-border);
  --pico-form-element-border-color: var(--rk-steel);
  --pico-border-radius: var(--rk-radius);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scrollbar-color: var(--rk-steel) var(--rk-bg);
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(rgb(255 255 255 / 1.5%) 1px, transparent 1px), var(--rk-bg);
  background-size: 100% 72px;
  color: var(--rk-text);
  font-size: 1rem;
  line-height: 1.65;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  background: radial-gradient(
    circle at 72% 8%,
    rgb(141 255 88 / 5%),
    transparent 30%
  );
  content: "";
  pointer-events: none;
}

a {
  color: var(--rk-text);
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--rk-green);
}

:focus-visible {
  outline: 2px solid var(--rk-green);
  outline-offset: 4px;
}

h1,
h2,
h3,
h4 {
  margin-top: 0;
  color: var(--rk-text);
  font-family: "Arial Narrow", "Roboto Condensed", "Segoe UI", sans-serif;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.02;
}

h1 {
  font-size: clamp(3rem, 7vw, 6.6rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.55rem);
}

p {
  color: var(--rk-muted);
}

code,
pre {
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
}

code {
  border: 1px solid var(--rk-border);
  background: #111414;
  color: var(--rk-green);
}

img {
  max-width: 100%;
}

.shell {
  width: min(1180px, calc(100% - 3rem));
  margin-inline: auto;
}

.narrow-shell {
  width: min(850px, calc(100% - 3rem));
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  transform: translateY(-180%);
  border: 1px solid var(--rk-green);
  background: var(--rk-bg);
  color: var(--rk-text);
}

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

.site-header {
  position: relative;
  z-index: 100;
  border-bottom: 1px solid var(--rk-border);
  background: rgb(13 15 15 / 92%);
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  min-height: 74px;
  align-items: center;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: baseline;
  color: var(--rk-sand);
  font-family: "Arial Narrow", "Roboto Condensed", "Segoe UI", sans-serif;
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand:hover {
  color: var(--rk-sand);
}

.brand__mark {
  color: var(--rk-green);
}

.brand__name {
  font-size: 1.35em;
}

.primary-nav {
  margin-left: auto;
}

.primary-nav ul {
  display: flex;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: 0.3rem;
  list-style: none;
}

.primary-nav a {
  position: relative;
  display: block;
  padding: 0.6rem 0.78rem;
  color: var(--rk-muted);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.035em;
  text-decoration: none;
  text-transform: uppercase;
}

.primary-nav a::after {
  position: absolute;
  right: 0.8rem;
  bottom: 0.22rem;
  left: 0.8rem;
  height: 1px;
  transform: scaleX(0);
  background: var(--rk-green);
  content: "";
  transition: transform 160ms ease;
}

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

.primary-nav a:hover::after,
.primary-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.prototype-chip,
.badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  border: 1px solid var(--rk-sand-dark);
  color: var(--rk-sand);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
  text-transform: uppercase;
}

.prototype-chip {
  padding: 0.42rem 0.55rem;
}

.badge {
  padding: 0.45rem 0.55rem;
}

.badge--green {
  border-color: var(--rk-green-dim);
  background: rgb(141 255 88 / 8%);
  color: var(--rk-green);
}

.badge--neutral {
  border-color: var(--rk-steel);
  color: var(--rk-muted);
}

.nav-toggle {
  display: none;
  width: auto;
  margin: 0 0 0 auto;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--rk-steel);
  background: transparent;
  color: var(--rk-text);
  font-size: 0.78rem;
}

.nav-toggle__icon {
  display: inline-block;
  width: 1rem;
  height: 0.7rem;
  margin-left: 0.5rem;
  border-block: 1px solid currentcolor;
}

.section-grid {
  position: relative;
  background-image:
    linear-gradient(90deg, rgb(255 255 255 / 2%) 1px, transparent 1px),
    linear-gradient(rgb(255 255 255 / 2%) 1px, transparent 1px);
  background-size: 40px 40px;
}

.section {
  padding-block: clamp(4.5rem, 8vw, 8rem);
}

.section--tight {
  padding-top: clamp(3rem, 6vw, 5.5rem);
}

.section--bordered {
  border-block: 1px solid var(--rk-border);
  background: var(--rk-bg-raised);
}

.section-heading {
  display: grid;
  margin-bottom: 3rem;
  align-items: end;
  gap: 2rem;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
}

.section-heading h2 {
  max-width: 760px;
  margin-bottom: 0;
}

.section-heading > p {
  max-width: 540px;
  margin: 0;
  justify-self: end;
}

.section-heading--compact {
  margin-bottom: 2rem;
}

.eyebrow {
  margin-bottom: 0.8rem;
  color: var(--rk-green);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  margin: 0;
  padding: 0.72rem 1.1rem;
  align-items: center;
  justify-content: center;
  border: 1px solid;
  border-radius: var(--rk-radius);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.055em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    transform 150ms ease,
    background-color 150ms ease,
    border-color 150ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button--primary {
  border-color: var(--rk-green);
  background: var(--rk-green);
  color: #101510;
  box-shadow: 0 8px 28px rgb(141 255 88 / 12%);
}

.button--primary:hover {
  border-color: #b0ff8c;
  background: #b0ff8c;
  color: #101510;
}

.button--secondary {
  border-color: var(--rk-steel);
  background: rgb(255 255 255 / 2%);
  color: var(--rk-text);
}

.button--secondary:hover {
  border-color: var(--rk-sand);
  background: rgb(217 207 157 / 7%);
  color: var(--rk-sand);
}

.text-link {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 0.45rem;
  color: var(--rk-text);
  font-size: 0.83rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration-color: var(--rk-green-dim);
  text-transform: uppercase;
}

.text-link:hover {
  color: var(--rk-green);
}

.home-hero {
  position: relative;
  min-height: calc(100vh - 74px);
  overflow: hidden;
  border-bottom: 1px solid var(--rk-border);
  background-color: #0c0e0e;
}

.home-hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 30%;
  background: linear-gradient(transparent, var(--rk-bg));
  content: "";
  pointer-events: none;
}

.home-hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: calc(100vh - 74px);
  padding-block: clamp(3rem, 7vw, 7rem);
  align-items: center;
  gap: clamp(2rem, 6vw, 6rem);
  grid-template-columns: minmax(0, 1.24fr) minmax(320px, 0.76fr);
}

.home-hero__content {
  max-width: 820px;
}

.home-hero h1 {
  max-width: 880px;
  margin-bottom: 1.4rem;
  overflow-wrap: normal;
  text-wrap: balance;
  word-break: normal;
}

.home-hero__lede {
  max-width: 650px;
  margin-bottom: 2rem;
  color: #c5c5bd;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.home-hero .button-row {
  margin-bottom: 2.5rem;
}

.system-line {
  display: flex;
  margin-bottom: 1.8rem;
  align-items: center;
  gap: 0.55rem;
  color: var(--rk-green);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.system-line__pulse {
  width: 0.5rem;
  height: 0.5rem;
  background: var(--rk-green);
  box-shadow: 0 0 12px var(--rk-green);
}

.release-strip {
  display: grid;
  max-width: 720px;
  margin: 0;
  padding: 1.1rem 0;
  border-block: 1px solid var(--rk-border);
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
}

.release-strip li {
  display: block;
  padding-inline: 1rem;
  border-right: 1px solid var(--rk-border);
  list-style: none;
}

.release-strip li::marker {
  content: "";
}

.release-strip li:first-child {
  padding-left: 0;
}

.release-strip li:last-child {
  border-right: 0;
}

.release-strip span,
.release-strip strong {
  display: block;
}

.release-strip span {
  margin-bottom: 0.35rem;
  color: var(--rk-faint);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.release-strip strong {
  color: var(--rk-text);
  font-size: 0.8rem;
}

.home-hero__art {
  position: relative;
  z-index: 1;
  margin: 0;
}

.art-frame {
  position: relative;
  padding: 0.6rem;
  border: 1px solid var(--rk-steel);
  background: rgb(0 0 0 / 28%);
  box-shadow: var(--rk-shadow);
}

.art-frame::before {
  position: absolute;
  z-index: -1;
  inset: 8% -8% -8% 8%;
  border: 1px solid rgb(141 255 88 / 30%);
  content: "";
}

.art-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  filter: contrast(1.05) saturate(0.9);
}

.art-frame__corner {
  position: absolute;
  width: 38px;
  height: 38px;
  border-color: var(--rk-green);
}

.art-frame__corner--top {
  top: -7px;
  left: -7px;
  border-top: 2px solid;
  border-left: 2px solid;
}

.art-frame__corner--bottom {
  right: -7px;
  bottom: -7px;
  border-right: 2px solid;
  border-bottom: 2px solid;
}

.home-hero__art figcaption,
.image-credit {
  margin-top: 1rem;
  color: var(--rk-faint);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  text-align: center;
  text-transform: uppercase;
}

.binary-field {
  position: absolute;
  z-index: 1;
  top: 5%;
  right: -2%;
  display: grid;
  width: 50%;
  opacity: 0.08;
  color: var(--rk-green);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: clamp(4rem, 10vw, 10rem);
  font-weight: 800;
  grid-template-columns: repeat(3, 1fr);
  line-height: 0.8;
  pointer-events: none;
  transform: rotate(-4deg);
}

.binary-field span:nth-child(even) {
  color: var(--rk-text);
}

.feature-grid {
  display: grid;
  border-top: 1px solid var(--rk-border);
  border-left: 1px solid var(--rk-border);
  grid-template-columns: repeat(4, 1fr);
}

.feature-card {
  position: relative;
  min-height: 290px;
  margin: 0;
  padding: 1.8rem;
  border: 0;
  border-right: 1px solid var(--rk-border);
  border-bottom: 1px solid var(--rk-border);
  background: transparent;
  box-shadow: none;
}

.feature-card::after {
  position: absolute;
  right: 1.8rem;
  bottom: 1.5rem;
  width: 32px;
  height: 2px;
  background: var(--rk-steel);
  content: "";
}

.feature-card--accent {
  background: linear-gradient(145deg, rgb(141 255 88 / 9%), transparent 70%);
}

.feature-card--accent::after {
  background: var(--rk-green);
}

.feature-card__index {
  display: block;
  margin-bottom: 4rem;
  color: var(--rk-faint);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.7rem;
}

.feature-card h3 {
  margin-bottom: 0.8rem;
}

.feature-card p {
  margin-bottom: 0;
  font-size: 0.92rem;
}

.section--steps {
  border-top: 1px solid var(--rk-border);
  background: var(--rk-bg-raised);
}

.split-layout {
  display: grid;
  align-items: start;
  gap: clamp(3rem, 8vw, 8rem);
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
}

.split-layout--reverse {
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
}

.split-layout__intro {
  position: sticky;
  top: 2rem;
}

.split-layout__intro p:not(.eyebrow) {
  max-width: 520px;
}

.step-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rk-border);
  list-style: none;
}

.step-list li {
  display: grid;
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--rk-border);
  align-items: baseline;
  gap: 1.5rem;
  grid-template-columns: 48px 1fr;
}

.step-list > li > span {
  color: var(--rk-green);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.72rem;
}

.step-list strong {
  color: var(--rk-text);
  font-size: 1.22rem;
}

.step-list p {
  margin: 0.3rem 0 0;
}

.plugin-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}

.plugin-grid--large {
  margin-top: 3rem;
}

.plugin-card {
  display: flex;
  min-height: 330px;
  margin: 0;
  padding: 1.6rem;
  flex-direction: column;
  border: 1px solid var(--rk-border);
  background: var(--rk-bg-raised);
  box-shadow: none;
  transition:
    border-color 160ms ease,
    transform 160ms ease;
}

.plugin-card:hover {
  transform: translateY(-4px);
  border-color: var(--rk-steel);
}

.plugin-card__meta {
  display: flex;
  margin-bottom: 2.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  color: var(--rk-faint);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.64rem;
  text-transform: uppercase;
}

.plugin-card h3 {
  margin-bottom: 0.3rem;
}

.plugin-card__author {
  margin: 0 0 1.5rem;
  color: var(--rk-sand);
  font-size: 0.78rem;
}

.plugin-card .text-link {
  margin-top: auto;
}

.section-action {
  margin-top: 2rem;
  text-align: center;
}

.section--developer {
  border-block: 1px solid var(--rk-border);
  background:
    linear-gradient(110deg, rgb(141 255 88 / 7%), transparent 45%),
    var(--rk-bg-raised);
}

.developer-callout {
  display: grid;
  align-items: center;
  gap: 3rem;
  grid-template-columns: minmax(0, 1fr) auto;
}

.developer-callout h2 {
  margin-bottom: 1rem;
}

.developer-callout p:not(.eyebrow) {
  max-width: 760px;
  margin-bottom: 0;
}

.developer-callout__actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.section--open-source {
  padding-block: 3rem;
}

.source-strip {
  display: grid;
  padding-block: 1.5rem;
  border-block: 1px solid var(--rk-border);
  align-items: center;
  gap: 2rem;
  grid-template-columns: 1fr 1.2fr auto;
}

.source-strip h2 {
  margin: 0.8rem 0 0;
  font-size: 1.7rem;
}

.source-strip p {
  margin: 0;
}

.page-hero {
  overflow: hidden;
  border-bottom: 1px solid var(--rk-border);
  background:
    linear-gradient(90deg, rgb(141 255 88 / 4%), transparent 35%),
    var(--rk-bg-raised);
}

.page-hero__inner {
  position: relative;
  padding-block: clamp(4rem, 9vw, 8rem);
}

.page-hero__inner::after {
  position: absolute;
  top: 50%;
  right: 2%;
  width: min(28vw, 320px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--rk-green));
  content: "";
}

.page-hero h1 {
  max-width: 900px;
  margin-bottom: 1rem;
  overflow-wrap: normal;
  word-break: normal;
}

.page-hero__intro {
  max-width: 720px;
  margin: 0;
  color: #c2c2ba;
  font-size: clamp(1.08rem, 2vw, 1.25rem);
}

.content-grid {
  display: grid;
  align-items: start;
  gap: clamp(3rem, 8vw, 7rem);
  grid-template-columns: minmax(0, 1fr) 300px;
}

.content-grid--balanced {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.content-aside {
  position: sticky;
  top: 2rem;
}

.aside-card {
  padding: 1.4rem;
  border: 1px solid var(--rk-border);
  background: var(--rk-bg-raised);
}

.aside-card h2 {
  margin: 1rem 0 0.4rem;
  font-size: 1.6rem;
}

.aside-card > p {
  margin-bottom: 1.2rem;
}

.aside-nav {
  display: grid;
  margin-top: 1rem;
  border-top: 1px solid var(--rk-border);
}

.aside-nav a {
  padding: 0.8rem 0.2rem;
  border-bottom: 1px solid var(--rk-border);
  color: var(--rk-muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
}

.aside-nav a:hover {
  color: var(--rk-green);
}

.notice {
  display: grid;
  margin-bottom: 2rem;
  padding: 1.4rem;
  border: 1px solid var(--rk-border);
  border-left-width: 3px;
  background: var(--rk-bg-raised);
  gap: 1.5rem;
  grid-template-columns: minmax(220px, 0.75fr) minmax(260px, 1.25fr);
}

.notice > p,
.notice > div > p {
  margin: 0;
}

.notice h2,
.notice h3 {
  margin: 0.65rem 0 0;
  font-size: 1.35rem;
}

.notice__label {
  color: var(--rk-green);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.notice--success,
.notice--technical,
.notice--prototype {
  border-left-color: var(--rk-green);
}

.notice--warning {
  display: block;
  border-left-color: var(--rk-warning);
}

.notice--warning .notice__label {
  color: var(--rk-warning);
}

.notice--large {
  display: block;
  margin-bottom: 0;
  padding: 2rem;
}

.notice--large h3 {
  margin-bottom: 1rem;
  font-size: 1.7rem;
}

.install-steps {
  margin: 0 0 2rem;
  padding: 0;
  border-top: 1px solid var(--rk-border);
  list-style: none;
}

.install-steps li {
  display: grid;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--rk-border);
  gap: 1.4rem;
  grid-template-columns: 48px 1fr;
}

.install-steps > li > span {
  color: var(--rk-green);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.7rem;
}

.install-steps h3 {
  margin-bottom: 0.45rem;
  font-size: 1.25rem;
}

.install-steps p {
  margin: 0;
}

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

.check-list li {
  position: relative;
  padding: 0.35rem 0 0.35rem 1.3rem;
  color: var(--rk-muted);
  font-size: 0.82rem;
}

.check-list li::before {
  position: absolute;
  left: 0;
  color: var(--rk-green);
  content: "✓";
}

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

.compatibility-card {
  margin: 0;
  padding: 1.6rem;
  border: 1px solid var(--rk-border);
  background: var(--rk-bg);
  box-shadow: none;
}

.compatibility-card__header {
  display: flex;
  margin-bottom: 1.5rem;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 1px solid var(--rk-border);
}

.compatibility-card__header span {
  padding-bottom: 0.6rem;
  color: var(--rk-faint);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
}

.compatibility-card__header strong {
  color: var(--rk-sand);
  font-family: "Arial Narrow", "Segoe UI", sans-serif;
  font-size: 2.6rem;
}

.compatibility-card__method {
  color: var(--rk-text);
  font-weight: 800;
}

.tag-row {
  display: flex;
  gap: 0.5rem;
}

.compatibility-grid + .notice {
  margin-top: 1rem;
}

.disclosure {
  margin: 0;
  padding: 0;
  border: 0;
  border-top: 1px solid var(--rk-border);
  border-radius: 0;
  background: transparent;
}

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

.disclosure summary {
  padding: 1.5rem 0;
  color: var(--rk-text);
  font-family: "Arial Narrow", "Segoe UI", sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
}

.disclosure summary::marker {
  color: var(--rk-green);
}

.disclosure__content {
  padding: 0 0 2rem 2rem;
}

.disclosure__content > :last-child {
  margin-bottom: 0;
}

.settings-preview {
  display: block;
  width: min(100%, 920px);
  margin: 2rem auto 0;
  border: 1px solid var(--rk-border);
}

.section--support {
  border-top: 1px solid var(--rk-border);
  background: var(--rk-bg-raised);
}

.support-strip {
  display: grid;
  align-items: center;
  gap: 2rem;
  grid-template-columns: minmax(260px, 1fr) minmax(260px, 1fr) auto;
}

.support-strip h2 {
  margin-bottom: 0;
  font-size: 2rem;
}

.support-strip p {
  margin: 0;
}

.release-card {
  display: grid;
  padding: clamp(1.6rem, 4vw, 3rem);
  border: 1px solid var(--rk-steel);
  background:
    linear-gradient(125deg, rgb(141 255 88 / 7%), transparent 45%),
    var(--rk-bg-raised);
  box-shadow: var(--rk-shadow);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  grid-template-columns: 1.1fr 0.9fr auto;
}

.release-card__label {
  margin: 1.3rem 0 0.3rem;
  color: var(--rk-faint);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
}

.release-card h2 {
  margin-bottom: 0.5rem;
  font-size: clamp(2.5rem, 5vw, 4rem);
}

.release-card h2 span {
  color: var(--rk-sand);
}

.release-card__identity > p:last-child {
  margin: 0;
}

.release-card__compatibility h3 {
  margin-bottom: 1rem;
  font-size: 1rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.release-card__compatibility ul {
  margin: 0;
  padding-left: 1.2rem;
}

.release-card__compatibility li {
  color: var(--rk-muted);
  font-size: 0.84rem;
}

.release-card__actions {
  display: grid;
  gap: 0.65rem;
}

.change-list {
  margin: 2rem 0;
  padding: 0;
  border-top: 1px solid var(--rk-border);
  list-style: none;
}

.change-list li {
  position: relative;
  padding: 1rem 1rem 1rem 2rem;
  border-bottom: 1px solid var(--rk-border);
  color: var(--rk-text);
}

.change-list li::before {
  position: absolute;
  left: 0.4rem;
  color: var(--rk-green);
  content: "+";
  font-family: monospace;
}

.resource-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}

.resource-card {
  min-height: 280px;
  margin: 0;
  padding: 1.6rem;
  border: 1px solid var(--rk-border);
  background: transparent;
  box-shadow: none;
}

.resource-card__type {
  display: block;
  margin-bottom: 3rem;
  color: var(--rk-green);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.resource-card h3 {
  margin-bottom: 1rem;
}

.audience-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}

.audience-card {
  position: relative;
  min-height: 390px;
  margin: 0;
  padding: 1.7rem;
  border: 1px solid var(--rk-border);
  background: var(--rk-bg-raised);
  box-shadow: none;
}

.audience-card--primary {
  background: linear-gradient(145deg, rgb(141 255 88 / 10%), transparent 65%);
}

.audience-card__number {
  display: block;
  margin-bottom: 4rem;
  color: var(--rk-faint);
  font-family: "Cascadia Code", SFMono-Regular, consolas, monospace;
}

.audience-card h2 {
  margin-bottom: 1rem;
  font-size: 1.8rem;
}

.audience-card .button {
  position: absolute;
  right: 1.7rem;
  bottom: 1.7rem;
  left: 1.7rem;
}

.doc-card-grid {
  display: grid;
  border-top: 1px solid var(--rk-border);
  border-left: 1px solid var(--rk-border);
  grid-template-columns: repeat(2, 1fr);
}

.doc-card {
  display: block;
  min-height: 270px;
  padding: 1.6rem;
  border-right: 1px solid var(--rk-border);
  border-bottom: 1px solid var(--rk-border);
  color: var(--rk-text);
  text-decoration: none;
  transition: background-color 160ms ease;
}

.doc-card:hover {
  background: rgb(141 255 88 / 4%);
  color: var(--rk-text);
}

.doc-card__index {
  display: block;
  margin-bottom: 3rem;
  color: var(--rk-faint);
  font-family: monospace;
}

.doc-card h3 {
  margin-bottom: 0.8rem;
}

.doc-card p {
  max-width: 480px;
}

.upstream-callout {
  display: grid;
  padding: 2rem;
  border: 1px solid var(--rk-border);
  align-items: center;
  gap: 2rem;
  grid-template-columns: 1fr 1.2fr auto;
}

.upstream-callout h2 {
  margin: 1rem 0 0;
  font-size: 1.75rem;
}

.upstream-callout p {
  margin: 0;
}

.notice--prototype {
  margin-bottom: 0;
}

.principle-list {
  display: grid;
  border-top: 1px solid var(--rk-border);
}

.principle-list article {
  display: grid;
  margin: 0;
  padding: 1.4rem 0;
  border: 0;
  border-bottom: 1px solid var(--rk-border);
  background: transparent;
  box-shadow: none;
  gap: 1.5rem;
  grid-template-columns: 45px 1fr;
}

.principle-list article > span {
  color: var(--rk-green);
  font-family: monospace;
  font-size: 0.72rem;
}

.principle-list h3 {
  margin-bottom: 0.4rem;
  font-size: 1.2rem;
}

.principle-list p {
  margin: 0;
}

.developer-overview {
  display: grid;
  align-items: center;
  gap: clamp(3rem, 8vw, 7rem);
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.85fr);
}

.developer-overview__main h2 {
  margin: 1.5rem 0 1.2rem;
}

.developer-overview__main > p {
  max-width: 640px;
  font-size: 1.08rem;
}

.code-panel {
  border: 1px solid var(--rk-steel);
  background: #090b0b;
  box-shadow: var(--rk-shadow);
}

.code-panel__bar {
  display: flex;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--rk-border);
  align-items: center;
  gap: 0.45rem;
}

.code-panel__bar span {
  width: 0.55rem;
  height: 0.55rem;
  border: 1px solid var(--rk-steel);
  border-radius: 50%;
}

.code-panel__bar strong {
  margin-left: auto;
  color: var(--rk-faint);
  font-family: monospace;
  font-size: 0.65rem;
  font-weight: 400;
}

.code-panel pre {
  margin: 0;
  padding: 1.7rem;
  border: 0;
  background: transparent;
  color: var(--rk-text);
  font-size: 0.78rem;
  line-height: 2.2;
}

.code-panel code {
  border: 0;
  background: transparent;
  color: inherit;
}

.code-panel code span {
  margin-right: 1.2rem;
  color: var(--rk-green);
}

.example-grid {
  display: grid;
  border-top: 1px solid var(--rk-border);
  border-left: 1px solid var(--rk-border);
  grid-template-columns: repeat(3, 1fr);
}

.example-grid article {
  min-height: 240px;
  margin: 0;
  padding: 1.5rem;
  border: 0;
  border-right: 1px solid var(--rk-border);
  border-bottom: 1px solid var(--rk-border);
  background: transparent;
  box-shadow: none;
}

.example-grid article > span {
  display: block;
  margin-bottom: 3rem;
  color: var(--rk-green);
  font-family: monospace;
  font-size: 0.65rem;
}

.example-grid h3 {
  margin-bottom: 0.8rem;
}

.requirements-panel {
  border: 1px solid var(--rk-border);
  background: var(--rk-bg-raised);
}

.requirements-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.requirements-panel li {
  display: flex;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--rk-border);
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.requirements-panel li:last-child {
  border-bottom: 0;
}

.requirements-panel span {
  color: var(--rk-faint);
  font-family: monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
}

.requirements-panel strong {
  color: var(--rk-text);
  font-size: 0.85rem;
  text-align: right;
}

.doc-link-strip {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
}

.doc-link-strip a {
  display: flex;
  min-height: 130px;
  padding: 1.4rem;
  flex-direction: column;
  justify-content: center;
  border: 1px solid var(--rk-border);
  color: var(--rk-text);
  text-decoration: none;
}

.doc-link-strip a:hover {
  border-color: var(--rk-green-dim);
  color: var(--rk-green);
}

.doc-link-strip span {
  font-size: 1.15rem;
  font-weight: 800;
}

.doc-link-strip small {
  margin-top: 0.5rem;
  color: var(--rk-muted);
}

.breadcrumbs-wrap {
  padding-top: 2rem;
}

.breadcrumbs ol {
  display: flex;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.breadcrumbs li {
  color: var(--rk-faint);
  font-size: 0.72rem;
}

.breadcrumbs li:not(:last-child)::after {
  margin-left: 0.5rem;
  color: var(--rk-steel);
  content: "/";
}

.breadcrumbs a {
  color: var(--rk-muted);
}

.document-shell {
  display: grid;
  padding-block: clamp(3rem, 7vw, 7rem);
  align-items: start;
  gap: clamp(3rem, 8vw, 8rem);
  grid-template-columns: 230px minmax(0, 760px);
}

.document-nav {
  position: sticky;
  top: 2rem;
}

.document-nav nav {
  display: grid;
  border-top: 1px solid var(--rk-border);
}

.document-nav a {
  padding: 0.8rem 0.2rem;
  border-bottom: 1px solid var(--rk-border);
  color: var(--rk-muted);
  font-size: 0.78rem;
  text-decoration: none;
}

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

.markdown-content {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.markdown-content > h1:first-of-type {
  margin-bottom: 2rem;
  font-size: clamp(2.8rem, 6vw, 5rem);
}

.markdown-content h2 {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rk-border);
  font-size: 2rem;
}

.markdown-content h3 {
  margin-top: 2.2rem;
  font-size: 1.35rem;
}

.markdown-content p,
.markdown-content li {
  color: #b8b9b1;
}

.markdown-content strong {
  color: var(--rk-text);
}

.document-kicker {
  margin-bottom: 1rem;
  color: var(--rk-green);
  font-family: monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.document-source-note {
  margin-top: 4rem;
  padding: 1.3rem;
  border: 1px solid var(--rk-border);
  border-left: 3px solid var(--rk-green);
  background: var(--rk-bg-raised);
}

.document-source-note p {
  margin: 1rem 0 0;
  font-size: 0.82rem;
}

.error-page {
  min-height: calc(100vh - 74px);
}

.error-page__inner {
  position: relative;
  padding-block: clamp(6rem, 12vw, 12rem);
}

.error-page__inner h1 {
  max-width: 800px;
  margin-bottom: 1.5rem;
}

.error-page__inner > p:not(.eyebrow) {
  max-width: 600px;
  font-size: 1.1rem;
}

.error-page__code {
  position: absolute;
  z-index: -1;
  top: 50%;
  right: 5%;
  transform: translateY(-50%);
  color: rgb(141 255 88 / 5%);
  font-family: "Arial Narrow", sans-serif;
  font-size: clamp(10rem, 30vw, 28rem);
  font-weight: 900;
  line-height: 0.8;
}

.site-footer {
  padding-top: 4rem;
  border-top: 1px solid var(--rk-border);
  background: #090b0b;
}

.site-footer__grid {
  display: grid;
  padding-bottom: 4rem;
  gap: clamp(2rem, 8vw, 7rem);
  grid-template-columns: 1.4fr 0.7fr 0.7fr;
}

.brand--footer {
  margin-bottom: 1rem;
}

.site-footer__grid > div:first-child p {
  max-width: 440px;
  margin: 0;
  font-size: 0.84rem;
}

.site-footer h2 {
  margin-bottom: 1rem;
  color: var(--rk-faint);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li {
  margin-bottom: 0.45rem;
}

.site-footer li a {
  color: var(--rk-muted);
  font-size: 0.8rem;
  text-decoration: none;
}

.site-footer li a:hover {
  color: var(--rk-green);
}

.site-footer__bottom {
  display: flex;
  padding-block: 1.2rem;
  border-top: 1px solid var(--rk-border);
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--rk-faint);
  font-family: monospace;
  font-size: 0.63rem;
  text-transform: uppercase;
}

@media (width > 560px) {
  .page-hero h1 {
    font-size: clamp(3rem, 6vw, 5.25rem);
  }
}

@media (width >= 1280px) {
  .home-hero__grid {
    width: min(1460px, calc(100% - 4rem));
    grid-template-columns: minmax(0, 1.3fr) minmax(360px, 0.7fr);
  }

  .home-hero__art {
    width: min(100%, 540px);
    justify-self: end;
  }
}

@media (width <= 1020px) {
  .prototype-chip {
    display: none;
  }

  .home-hero {
    min-height: auto;
  }

  .home-hero__grid {
    min-height: auto;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .release-card {
    grid-template-columns: 1fr 1fr;
  }

  .release-card__actions {
    grid-column: 1 / -1;
    grid-template-columns: repeat(2, 1fr);
  }

  .developer-overview {
    grid-template-columns: 1fr;
  }

  .developer-overview__main {
    max-width: 760px;
  }
}

@media (width <= 820px) {
  .site-header__inner {
    position: relative;
    min-height: 66px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
  }

  .primary-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: none;
    margin: 0;
    padding: 0.8rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--rk-border);
    background: var(--rk-bg);
    box-shadow: var(--rk-shadow);
  }

  .primary-nav.is-open {
    display: block;
  }

  .primary-nav ul {
    display: grid;
  }

  .primary-nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--rk-border);
  }

  .primary-nav a::after {
    right: auto;
    bottom: -1px;
    left: 0;
    width: 40px;
  }

  .home-hero__grid {
    padding-top: 4rem;
    grid-template-columns: 1fr;
  }

  .home-hero__art {
    width: min(100%, 520px);
    margin-inline: auto;
  }

  .binary-field {
    top: auto;
    bottom: 15%;
    width: 100%;
  }

  .section-heading,
  .split-layout,
  .split-layout--reverse,
  .content-grid,
  .content-grid--balanced,
  .developer-callout,
  .source-strip,
  .support-strip,
  .upstream-callout {
    grid-template-columns: 1fr;
  }

  .split-layout__intro,
  .content-aside {
    position: static;
  }

  .plugin-grid,
  .resource-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .plugin-card {
    min-height: 290px;
  }

  .developer-callout__actions {
    align-items: flex-start;
  }

  .source-strip {
    padding-block: 2rem;
  }

  .compatibility-grid {
    grid-template-columns: 1fr;
  }

  .content-aside {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr 1fr;
  }

  .aside-nav {
    margin-top: 0;
  }

  .release-card {
    grid-template-columns: 1fr;
  }

  .release-card__actions {
    grid-column: auto;
  }

  .example-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .document-shell {
    gap: 2rem;
    grid-template-columns: 1fr;
  }

  .document-nav {
    position: static;
  }

  .document-nav nav {
    display: flex;
    overflow-x: auto;
  }

  .document-nav a {
    min-width: max-content;
    padding-inline: 0.8rem;
    border-right: 1px solid var(--rk-border);
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__grid > div:first-child {
    grid-column: 1 / -1;
  }
}

@media (width <= 560px) {
  .shell,
  .narrow-shell {
    width: min(100% - 2rem, 1180px);
  }

  .brand {
    font-size: 0.96rem;
  }

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

  .nav-toggle__icon {
    margin-left: 0;
  }

  h1 {
    font-size: clamp(2.7rem, 15vw, 4.6rem);
  }

  .home-hero__grid {
    padding-block: 3rem 5rem;
  }

  .release-strip {
    grid-template-columns: 1fr;
  }

  .release-strip li,
  .release-strip li:first-child {
    padding: 0.7rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--rk-border);
  }

  .release-strip li:last-child {
    border-bottom: 0;
  }

  .button-row,
  .developer-callout__actions {
    display: grid;
    width: 100%;
  }

  .button-row .button,
  .developer-callout__actions .button {
    width: 100%;
  }

  .feature-grid,
  .doc-card-grid,
  .example-grid,
  .doc-link-strip {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 240px;
  }

  .feature-card__index {
    margin-bottom: 2.5rem;
  }

  .section-heading {
    gap: 1rem;
  }

  .developer-callout__actions {
    justify-items: stretch;
  }

  .page-hero__inner::after {
    display: none;
  }

  .notice {
    grid-template-columns: 1fr;
  }

  .install-steps li {
    grid-template-columns: 36px 1fr;
  }

  .content-aside {
    grid-template-columns: 1fr;
  }

  .disclosure__content {
    padding-left: 0.5rem;
  }

  .release-card__actions {
    grid-template-columns: 1fr;
  }

  .audience-card {
    min-height: 410px;
  }

  .developer-overview {
    gap: 2rem;
  }

  .code-panel pre {
    padding: 1.2rem;
    overflow-x: auto;
    font-size: 0.68rem;
  }

  .requirements-panel li {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }

  .requirements-panel strong {
    text-align: left;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__grid > div:first-child {
    grid-column: auto;
  }

  .site-footer__bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .system-line__pulse {
    animation: status-pulse 2.2s ease-in-out infinite;
  }

  .binary-field {
    animation: binary-drift 12s ease-in-out infinite alternate;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@keyframes status-pulse {
  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 12px var(--rk-green);
  }

  50% {
    opacity: 0.45;
    box-shadow: 0 0 3px var(--rk-green);
  }
}

@keyframes binary-drift {
  from {
    transform: translate3d(0, 0, 0) rotate(-4deg);
  }

  to {
    transform: translate3d(-2%, 2%, 0) rotate(-2deg);
  }
}