:root {
  color-scheme: light dark;
  --black: #11100e;
  --cream: #f3f0e8;
  --white: #fffdf8;
  --red: #d83a2e;
  --blue: #1746a2;
  --yellow: #f2c230;
  --page: var(--cream);
  --surface: var(--white);
  --text: var(--black);
  --muted: #5f5b53;
  --line: var(--black);
  --focus: var(--blue);
  --content: 84rem;
  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --section-space: clamp(3.75rem, 8vw, 7.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #11100e;
    --surface: #1d1a17;
    --text: #f3f0e8;
    --muted: #bbb4a8;
    --line: #70695f;
    --focus: #8ba8ff;
    --red: #ff675a;
    --blue: #7898ff;
    --yellow: #f4ca42;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 1rem;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1rem, 0.35vw + 0.92rem, 1.125rem);
  font-synthesis: none;
  line-height: 1.58;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.22em;
}

a:hover {
  text-decoration-thickness: 0.18em;
}

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

::selection {
  background: var(--yellow);
  color: var(--black);
}

h1,
h2,
h3,
p,
figure,
dl,
dd,
pre {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

h2 {
  max-width: 16ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.4rem, 5.5vw, 5rem);
  text-wrap: balance;
}

h3 {
  font-size: clamp(1.35rem, 2.5vw, 2rem);
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-variant-ligatures: none;
}

p code,
li code,
dd code {
  padding: 0.08em 0.28em;
  border: 1px solid currentColor;
  background: color-mix(in srgb, var(--surface) 65%, transparent);
  font-size: 0.88em;
}

pre {
  max-width: 100%;
  margin-bottom: 0;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  tab-size: 2;
}

pre code {
  border: 0;
  background: transparent;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 100;
  padding: 0.8rem 1rem;
  background: var(--black);
  color: var(--cream);
  font-weight: 750;
  transform: translateY(-120%);
}

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

.color-rail {
  display: grid;
  grid-template-columns: 5fr 2fr 3fr;
  width: 100%;
  height: 0.6rem;
  background: var(--black);
}

.color-rail i:nth-child(1) {
  background: var(--red);
}

.color-rail i:nth-child(2) {
  background: var(--yellow);
}

.color-rail i:nth-child(3) {
  background: var(--blue);
}

.site-header,
.hero,
.indexed-section,
.proof-grid,
.final-install,
.site-footer {
  width: min(var(--content), calc(100% - (2 * var(--gutter))));
  margin-inline: auto;
  border-right: 2px solid var(--line);
  border-left: 2px solid var(--line);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 6rem;
  padding: 1rem clamp(1.1rem, 2.5vw, 2.25rem);
  border-bottom: 2px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 850;
  letter-spacing: -0.035em;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  flex: 0 0 auto;
}

.site-header nav,
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.3rem clamp(0.9rem, 2vw, 1.6rem);
  font-size: 0.88rem;
  font-weight: 700;
}

.site-header nav a,
.site-footer nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  text-decoration: none;
}

.site-header nav a:hover,
.site-footer nav a:hover {
  text-decoration: underline;
  text-decoration-thickness: 0.15em;
  text-underline-offset: 0.3em;
}

.site-header .nav-install {
  min-height: 2.75rem;
  padding: 0 0.95rem;
  background: var(--text);
  color: var(--page);
  text-decoration: none;
}

.site-header .nav-install:hover {
  background: var(--red);
  color: var(--surface);
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.58fr) minmax(18rem, 0.62fr);
  border-bottom: 2px solid var(--line);
}

.hero-copy {
  min-width: 0;
  padding: clamp(4rem, 9vw, 8.5rem) clamp(1.25rem, 5.5vw, 5rem) clamp(3.5rem, 7vw, 6.5rem);
}

.kicker,
.eyebrow,
.install-heading,
.section-number {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  line-height: 1.3;
  text-transform: uppercase;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2.1rem;
  color: var(--muted);
}

.kicker span {
  padding: 0.35rem 0.5rem;
  background: var(--yellow);
  color: var(--black);
}

h1 {
  max-width: 9.5ch;
  margin-bottom: clamp(2rem, 4vw, 3.25rem);
  font-size: clamp(3.8rem, 8.1vw, 8.4rem);
  letter-spacing: -0.075em;
  line-height: 0.84;
  text-wrap: balance;
}

h1 em {
  color: var(--red);
  font-style: normal;
}

.lede {
  max-width: 43rem;
  margin-bottom: clamp(2.2rem, 4vw, 3.4rem);
  font-size: clamp(1.08rem, 1.2vw, 1.28rem);
  line-height: 1.55;
}

.install-card {
  max-width: 49rem;
  scroll-margin-top: 1rem;
  border: 2px solid var(--line);
  background: var(--surface);
}

.install-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--line);
}

.install-heading span:last-child {
  color: var(--muted);
}

.install-card pre {
  padding: 1.25rem 1rem;
  background: var(--black);
  color: var(--cream);
  font-size: clamp(0.78rem, 1.35vw, 0.98rem);
  line-height: 1.5;
  white-space: nowrap;
}

.install-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  padding: 0.85rem 1rem 0.95rem;
  border-top: 2px solid var(--line);
  font-size: 0.88rem;
  font-weight: 750;
}

.requirements {
  max-width: 49rem;
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.hero-system {
  display: flex;
  min-width: 0;
  margin: 0;
  border-left: 2px solid var(--line);
  background: var(--black);
  color: var(--cream);
  flex-direction: column;
}

.mark-stage {
  display: grid;
  flex: 1 1 auto;
  min-height: 24rem;
  padding: clamp(2rem, 5vw, 4.5rem);
  place-items: center;
  background:
    linear-gradient(90deg, transparent 49.6%, rgb(243 240 232 / 18%) 49.6%, rgb(243 240 232 / 18%) 50.4%, transparent 50.4%),
    linear-gradient(transparent 49.6%, rgb(243 240 232 / 18%) 49.6%, rgb(243 240 232 / 18%) 50.4%, transparent 50.4%);
}

.mark-stage img {
  width: min(82%, 21rem);
}

.hero-system figcaption {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 2px solid var(--cream);
}

.hero-system figcaption span {
  display: grid;
  gap: 0.25rem;
  padding: 1.15rem;
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  line-height: 1.25;
  text-transform: uppercase;
}

.hero-system figcaption span + span {
  border-left: 2px solid var(--cream);
}

.hero-system figcaption strong {
  color: var(--yellow);
  font-size: 2.2rem;
  letter-spacing: -0.06em;
  line-height: 1;
}

.indexed-section {
  display: grid;
  grid-template-columns: clamp(5rem, 13vw, 11rem) minmax(0, 1fr);
  scroll-margin-top: 1rem;
  border-bottom: 2px solid var(--line);
}

.section-number {
  margin: 0;
  padding: clamp(2rem, 4vw, 3rem) clamp(1rem, 2vw, 1.8rem);
  border-right: 2px solid var(--line);
  color: var(--red);
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.06em;
  line-height: 1;
}

.section-body {
  min-width: 0;
  padding: var(--section-space) clamp(1.25rem, 6vw, 6.5rem);
}

.eyebrow {
  margin-bottom: 1.35rem;
  color: var(--muted);
}

.section-intro {
  max-width: 47rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
  font-size: clamp(1.08rem, 1.5vw, 1.3rem);
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--line);
  list-style: none;
}

.principle-list li {
  display: grid;
  align-content: start;
  gap: 0.75rem;
  padding: 1.5rem clamp(1rem, 2vw, 1.6rem) 0 0;
}

.principle-list li + li {
  padding-left: clamp(1rem, 2vw, 1.6rem);
  border-left: 2px solid var(--line);
}

.principle-list strong {
  font-size: 1.04rem;
  line-height: 1.3;
}

.principle-list span {
  color: var(--muted);
  font-size: 0.92rem;
}

.surface {
  border-color: var(--black);
  background: var(--yellow);
  color: var(--black);
}

.surface .section-number,
.surface .section-body,
.surface .principle-list {
  border-color: var(--black);
}

.surface .section-number {
  color: #1746a2;
}

.surface .eyebrow {
  color: #4c3b00;
}

.surface-grid {
  display: grid;
  grid-template-columns: minmax(16rem, 0.8fr) minmax(0, 1.4fr);
  margin-bottom: 2rem;
  border: 2px solid var(--black);
}

.surface-grid article {
  min-width: 0;
}

.surface-grid article > header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem 1.35rem;
  border-bottom: 2px solid currentColor;
}

.surface-grid article > header h3 {
  margin: 0;
  font-size: 1.3rem;
}

.surface-grid article > header span {
  font-size: 2rem;
  font-weight: 850;
  letter-spacing: -0.06em;
  line-height: 1;
}

.tool-panel {
  background: var(--black);
  color: var(--cream);
}

.tool-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.tool-list li {
  padding: 1.1rem 1.35rem;
  border-bottom: 1px solid #716b62;
}

.tool-list li:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.tool-list li:nth-child(even) {
  border-left: 1px solid #716b62;
}

.tool-list code {
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 1rem;
}

.capability-panel {
  border-left: 2px solid var(--black);
  background: var(--cream);
  color: var(--black);
}

.capability-list {
  margin: 0;
}

.capability-list div {
  display: grid;
  grid-template-columns: minmax(13rem, 1.2fr) minmax(10rem, 1fr);
  gap: 1.25rem;
  padding: 1.05rem 1.35rem;
  border-bottom: 1px solid #8f887c;
}

.capability-list div:last-child {
  border-bottom: 0;
}

.capability-list dt,
.capability-list dd {
  min-width: 0;
  margin: 0;
}

.capability-list dt {
  font-weight: 750;
}

.capability-list dt code {
  overflow-wrap: anywhere;
}

.capability-list dd {
  color: #4e4a43;
  font-size: 0.9rem;
}

.surface-note {
  max-width: 58rem;
  margin: 0;
  font-size: 0.92rem;
}

.surface-note code {
  background: transparent;
}

.context-proof {
  margin-top: clamp(3rem, 6vw, 5.5rem);
  padding-top: clamp(2rem, 4vw, 3.5rem);
  border-top: 2px solid var(--black);
}

.context-proof-heading {
  display: grid;
  grid-template-columns: minmax(16rem, 0.9fr) minmax(0, 1.1fr);
  align-items: end;
  gap: 1.5rem clamp(2rem, 5vw, 5rem);
}

.context-proof-heading .eyebrow {
  margin-bottom: 0.85rem;
}

.context-proof-heading h3 {
  max-width: 12ch;
  margin-bottom: 0;
  font-size: clamp(2.1rem, 4.5vw, 4rem);
}

.context-proof-heading > p {
  max-width: 39rem;
  margin-bottom: 0;
  font-size: clamp(1rem, 1.25vw, 1.15rem);
}

.context-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: clamp(2rem, 4vw, 3.25rem) 0 1rem;
  border: 2px solid var(--black);
  background: var(--cream);
  color: var(--black);
}

.context-metrics div {
  min-width: 0;
  padding: 1.15rem 1.25rem;
}

.context-metrics div + div {
  border-left: 2px solid var(--black);
}

.context-metrics dt {
  font-size: clamp(1.05rem, 1.65vw, 1.75rem);
  font-weight: 850;
  letter-spacing: -0.055em;
  line-height: 1;
  white-space: nowrap;
}

.context-metrics dd {
  margin-top: 0.55rem;
  color: #4e4a43;
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  line-height: 1.3;
  text-transform: uppercase;
}

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

.context-shots figure {
  min-width: 0;
  margin: 0;
  border: 2px solid var(--black);
  background: var(--black);
}

.context-shots figcaption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 2px solid var(--black);
  background: var(--cream);
  color: var(--black);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.3;
  text-transform: uppercase;
}

.context-shots figcaption strong {
  color: #1746a2;
  font-size: 0.85rem;
  white-space: nowrap;
}

.context-shot-frame {
  display: grid;
  aspect-ratio: 1.65;
  overflow: hidden;
  background: #1d1d1d;
  place-items: center;
}

.context-shot-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.context-caveat {
  max-width: 62rem;
  margin: 1rem 0 0;
  font-size: 0.82rem;
}

.context-caveat code {
  background: transparent;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 2px solid var(--line);
}

.control-grid article {
  min-width: 0;
  padding: clamp(1.5rem, 3.5vw, 2.75rem);
}

.control-grid article + article {
  border-left: 2px solid var(--line);
}

.shape {
  display: block;
  width: 2.4rem;
  height: 2.4rem;
  margin-bottom: 2rem;
}

.shape.circle {
  border-radius: 50%;
  background: var(--red);
}

.shape.square {
  background: var(--blue);
}

.control-grid h3 {
  margin-bottom: 1rem;
}

.control-grid p {
  max-width: 33rem;
  margin-bottom: 1.5rem;
  color: var(--muted);
}

.control-grid pre {
  padding: 1rem;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: clamp(0.72rem, 1.1vw, 0.88rem);
  line-height: 1.65;
}

.research {
  background: var(--surface);
}

.research .section-number {
  color: var(--blue);
}

.research-list {
  margin: 0;
  padding: 0;
  border: 2px solid var(--line);
  list-style: none;
}

.research-list li {
  display: grid;
  grid-template-columns: minmax(15rem, 0.78fr) minmax(0, 1.35fr);
  gap: clamp(1.25rem, 3vw, 3rem);
  padding: clamp(1.25rem, 2.5vw, 2rem);
}

.research-list li + li {
  border-top: 1px solid var(--line);
}

.research-list li > div {
  display: grid;
  align-content: start;
  gap: 0.55rem;
}

.research-list time {
  color: var(--red);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  line-height: 1.3;
  text-transform: uppercase;
}

.research-list a {
  font-size: clamp(1.08rem, 1.8vw, 1.35rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.research-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.research-limit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  align-items: end;
  gap: 1.5rem 3rem;
  margin-top: 2rem;
  padding: 1.35rem 0 0 1.35rem;
  border-top: 2px solid var(--line);
  border-left: 0.55rem solid var(--red);
}

.research-limit p {
  max-width: 49rem;
  margin: 0;
  font-size: 0.92rem;
}

.research-limit a {
  font-size: 0.88rem;
  font-weight: 750;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 2px solid var(--line);
}

.proof-grid article {
  min-width: 0;
  padding: var(--section-space) clamp(1.5rem, 5vw, 5rem);
}

.proof-grid article + article {
  border-left: 2px solid var(--cream);
}

.proof-grid h2 {
  font-size: clamp(2.3rem, 4.5vw, 4.25rem);
}

.proof-grid p {
  max-width: 37rem;
}

.proof {
  background: #1746a2;
  color: var(--cream);
}

.limits {
  background: var(--black);
  color: var(--cream);
}

.proof .eyebrow,
.limits .eyebrow {
  color: var(--cream);
}

.proof p code,
.limits p code {
  background: transparent;
}

.proof a:focus-visible,
.limits a:focus-visible {
  outline-color: var(--yellow);
}

.text-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.6rem;
  margin-top: 2rem;
  font-weight: 750;
}

.final-install {
  padding: var(--section-space) clamp(1.25rem, 6vw, 6.5rem);
  border-bottom: 2px solid var(--line);
  background: var(--surface);
}

.final-install h2 {
  max-width: none;
}

.final-install pre {
  max-width: 50rem;
  margin-bottom: 1rem;
  padding: 1.2rem;
  border: 2px solid var(--line);
  background: var(--black);
  color: var(--cream);
  font-size: clamp(0.78rem, 1.35vw, 1rem);
  white-space: nowrap;
}

.final-install > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem 4rem;
  padding: clamp(2rem, 5vw, 4rem) clamp(1.25rem, 4vw, 3.5rem);
}

.footer-brand {
  margin-bottom: 1.1rem;
}

.site-footer p {
  max-width: 36rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.error-page {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.55fr);
  width: min(var(--content), calc(100% - (2 * var(--gutter))));
  min-height: calc(100vh - 0.6rem);
  margin-inline: auto;
  border-right: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
  border-left: 2px solid var(--line);
}

.error-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: clamp(1.25rem, 4vw, 3rem) clamp(1.25rem, 6vw, 6rem);
}

.error-brand {
  align-self: flex-start;
}

.error-message {
  margin-block: auto;
  padding-block: clamp(4rem, 10vw, 9rem);
}

.error-message h1 {
  max-width: none;
}

.error-message .lede {
  max-width: 32rem;
}

.error-mark {
  display: grid;
  min-width: 0;
  margin: 0;
  place-items: center;
  border-left: 2px solid var(--line);
  background: var(--black);
}

.error-mark img {
  width: min(62%, 21rem);
}

@media (max-width: 64rem) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-system {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(15rem, 0.8fr);
    border-top: 2px solid var(--line);
    border-left: 0;
  }

  .mark-stage {
    min-height: 19rem;
  }

  .hero-system figcaption {
    grid-template-columns: 1fr;
    border-top: 0;
    border-left: 2px solid var(--cream);
  }

  .hero-system figcaption span {
    align-content: center;
  }

  .hero-system figcaption span + span {
    border-top: 2px solid var(--cream);
    border-left: 0;
  }

  .surface-grid {
    grid-template-columns: minmax(14rem, 0.7fr) minmax(0, 1.3fr);
  }

  .capability-list div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

@media (max-width: 48rem) {
  :root {
    --gutter: 0.85rem;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.6rem;
    padding: 1rem;
  }

  .site-header nav {
    width: 100%;
    justify-content: flex-start;
    gap: 0.1rem 1.15rem;
  }

  .site-header .nav-install {
    margin-left: auto;
  }

  .hero-copy {
    padding-right: clamp(1.25rem, 6vw, 3rem);
    padding-left: clamp(1.25rem, 6vw, 3rem);
  }

  .indexed-section {
    display: block;
  }

  .section-number {
    padding: 1.2rem clamp(1.25rem, 6vw, 3rem);
    border-right: 0;
    border-bottom: 2px solid var(--line);
    font-size: 2rem;
  }

  .section-body {
    padding-right: clamp(1.25rem, 6vw, 3rem);
    padding-left: clamp(1.25rem, 6vw, 3rem);
  }

  .principle-list,
  .surface-grid,
  .context-proof-heading,
  .context-shots,
  .control-grid,
  .proof-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .context-metrics {
    grid-template-columns: minmax(0, 1fr);
  }

  .context-metrics div + div {
    border-top: 2px solid var(--black);
    border-left: 0;
  }

  .principle-list li,
  .principle-list li + li {
    padding: 1.3rem 0;
    border-bottom: 1px solid var(--line);
    border-left: 0;
  }

  .principle-list li:last-child {
    border-bottom: 0;
    padding-bottom: 0;
  }

  .capability-panel,
  .control-grid article + article,
  .proof-grid article + article {
    border-top: 2px solid currentColor;
    border-left: 0;
  }

  .control-grid article + article {
    border-top-color: var(--line);
  }

  .proof-grid article + article {
    border-top-color: var(--cream);
  }

  .proof-grid article {
    padding-right: clamp(1.25rem, 6vw, 3rem);
    padding-left: clamp(1.25rem, 6vw, 3rem);
  }

  .research-list li,
  .research-limit {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .site-footer nav {
    justify-content: flex-start;
  }

  .error-page {
    grid-template-columns: minmax(0, 1fr);
  }

  .error-mark {
    min-height: 22rem;
    border-top: 2px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 34rem) {
  .color-rail {
    height: 0.45rem;
  }

  .site-header .brand img {
    width: 38px;
    height: 38px;
  }

  .site-header nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--line);
  }

  .site-header nav a {
    justify-content: center;
    border-bottom: 1px solid var(--line);
    font-size: 0.7rem;
  }

  .site-header nav a:not(:last-child) {
    border-right: 1px solid var(--line);
  }

  .site-header nav a:nth-child(3n) {
    border-right: 0;
  }

  .site-header .nav-install {
    margin-left: 0;
    padding: 0;
  }

  h1 {
    font-size: clamp(2.75rem, 12vw, 4rem);
    line-height: 0.88;
  }

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

  .mark-stage {
    min-height: 16rem;
  }

  .hero-system figcaption {
    grid-template-columns: 1fr 1fr;
    border-top: 2px solid var(--cream);
    border-left: 0;
  }

  .hero-system figcaption span + span {
    border-top: 0;
    border-left: 2px solid var(--cream);
  }

  .install-heading,
  .install-links {
    align-items: flex-start;
    flex-direction: column;
  }

  .install-heading span:last-child {
    font-size: 0.68rem;
  }

  .tool-list {
    grid-template-columns: 1fr;
  }

  .tool-list li,
  .tool-list li:nth-last-child(-n + 2) {
    border-bottom: 1px solid #716b62;
  }

  .tool-list li:last-child {
    border-bottom: 0;
  }

  .tool-list li:nth-child(even) {
    border-left: 0;
  }
}

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

@media (forced-colors: active) {
  .color-rail,
  .shape,
  .mark-stage {
    forced-color-adjust: none;
  }

  .site-header .nav-install {
    border: 2px solid currentColor;
  }
}

@media print {
  :root {
    --page: #ffffff;
    --surface: #ffffff;
    --text: #000000;
    --muted: #333333;
    --line: #000000;
  }

  .color-rail,
  .site-header nav,
  .hero-system,
  .site-footer nav {
    display: none;
  }

  .site-header,
  .hero,
  .indexed-section,
  .proof-grid,
  .final-install,
  .site-footer {
    width: 100%;
  }

  .hero,
  .indexed-section,
  .proof-grid {
    display: block;
  }

  .section-number {
    border-right: 0;
  }

  .proof,
  .limits,
  .surface {
    background: #ffffff;
    color: #000000;
  }
}