:root {
  --font-geist-sans: Arial, Helvetica, sans-serif;
  --font-geist-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ink: #f3f3ef;
  --muted: #9c9c98;
  --faint: #5d5d5a;
  --black: #070707;
  --panel: #0d0d0d;
  --line: #272725;
  --signal: #d9ff3f;
  --signal-soft: #c4e93b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--black);
  background-size: 48px 48px;
  color: var(--ink);
  font-family: var(--font-geist-sans), Arial, Helvetica, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

.site-header {
  align-items: center;
  backdrop-filter: blur(16px);
  background: rgba(7, 7, 7, 0.86);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  height: 76px;
  padding: 0 4.5vw;
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 1.32rem;
  font-weight: 700;
  gap: 10px;
  letter-spacing: -0.05em;
  width: fit-content;
}

.logo-mark {
  display: block;
  overflow: hidden;
  position: relative;
}

.logo-mark.compact {
  border-radius: 50%;
  height: 30px;
  width: 30px;
}

.logo-mark.compact img {
  height: 58px;
  left: -14px;
  max-width: none;
  position: absolute;
  top: -8px;
  width: 58px;
}

.logo-mark.full {
  aspect-ratio: 1;
  box-shadow: 0 0 70px rgba(255, 255, 255, 0.06);
  width: clamp(185px, 23vw, 300px);
  z-index: 2;
}

.logo-mark.full img {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.site-header nav {
  align-items: center;
  display: flex;
  gap: clamp(22px, 4vw, 56px);
}

.site-header nav a,
.header-link {
  color: #b7b7b2;
  font-size: 0.82rem;
  font-weight: 560;
  letter-spacing: 0.02em;
  transition: color 180ms ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible,
.header-link:hover,
.header-link:focus-visible {
  color: var(--ink);
}

.header-link {
  align-items: center;
  display: flex;
  gap: 8px;
  justify-self: end;
}

.hero {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: calc(100svh - 76px);
  overflow: hidden;
  padding: clamp(72px, 9vw, 140px) 4.5vw;
  position: relative;
}

.hero::before {
  background: var(--signal);
  content: "";
  filter: blur(170px);
  height: 260px;
  opacity: 0.08;
  position: absolute;
  right: 4vw;
  top: 25%;
  width: 260px;
}

.hero-copy {
  max-width: 780px;
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-kicker {
  align-items: center;
  color: var(--muted);
  display: flex;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.69rem;
  font-weight: 600;
  gap: 9px;
  letter-spacing: 0.16em;
  margin: 0;
  text-transform: uppercase;
}

.live-dot {
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(217, 255, 63, 0.1);
  display: inline-block;
  height: 7px;
  width: 7px;
}

.hero h1 {
  font-size: clamp(3.7rem, 7.7vw, 8.2rem);
  font-weight: 640;
  letter-spacing: -0.076em;
  line-height: 0.88;
  margin: 36px 0 34px;
  max-width: 1000px;
}

.hero h1 span {
  color: var(--signal);
}

.hero-intro {
  color: #b8b8b3;
  font-size: clamp(1rem, 1.35vw, 1.25rem);
  letter-spacing: -0.025em;
  line-height: 1.62;
  margin: 0;
  max-width: 650px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 42px;
}

.button {
  align-items: center;
  border: 1px solid transparent;
  display: inline-flex;
  font-size: 0.84rem;
  font-weight: 650;
  gap: 28px;
  justify-content: space-between;
  min-height: 52px;
  padding: 0 20px;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

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

.button-primary {
  background: var(--ink);
  color: var(--black);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--signal);
}

.button-secondary {
  border-color: #3a3a37;
  color: var(--ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: #777770;
}

.hero-system {
  align-items: center;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  display: flex;
  justify-content: center;
  justify-self: end;
  max-width: 630px;
  position: relative;
  width: 88%;
}

.hero-system::before,
.hero-system::after {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  content: "";
  inset: 12%;
  position: absolute;
}

.hero-system::after {
  border-style: dashed;
  inset: 25%;
  transform: rotate(20deg);
}

.system-line {
  background: var(--ink);
  height: 3px;
  position: absolute;
  top: 50%;
  width: 22%;
}

.line-left {
  left: 0;
}

.line-right {
  right: 0;
}

.cell-symbol {
  align-items: center;
  display: flex;
  gap: 7px;
  position: absolute;
  right: -18px;
  top: 50%;
  transform: translateY(-50%);
}

.cell-symbol i {
  background: var(--signal);
  display: block;
  width: 3px;
}

.cell-long {
  height: 38px;
}

.cell-short {
  height: 22px;
}

.system-label {
  color: var(--faint);
  display: flex;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.56rem;
  font-weight: 600;
  justify-content: space-between;
  letter-spacing: 0.14em;
  left: 18px;
  position: absolute;
  right: 18px;
}

.system-label.top {
  top: 17px;
}

.system-label.bottom {
  bottom: 17px;
}

.hero-index {
  bottom: 18px;
  color: var(--faint);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.6rem;
  left: 4.5vw;
  letter-spacing: 0.12em;
  margin: 0;
  position: absolute;
}

.hero-index span {
  margin: 0 6px;
}

.section-shell {
  padding-left: 4.5vw;
  padding-right: 4.5vw;
}

.manifesto {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 40px;
  grid-template-columns: minmax(130px, 0.28fr) 1fr;
  padding-bottom: clamp(80px, 10vw, 150px);
  padding-top: clamp(80px, 10vw, 150px);
}

.manifesto > div {
  max-width: 1120px;
}

.manifesto > div > p {
  font-size: clamp(2.1rem, 4.5vw, 5rem);
  font-weight: 470;
  letter-spacing: -0.06em;
  line-height: 1.05;
  margin: 0;
}

.manifesto strong {
  color: var(--signal);
  font-weight: 560;
}

.manifesto > div > span {
  color: var(--muted);
  display: block;
  font-size: 1rem;
  line-height: 1.65;
  margin-top: 40px;
  max-width: 570px;
}

.videos,
.resources,
.tools,
.roadmap,
.current-build {
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(90px, 11vw, 170px);
  padding-top: clamp(90px, 11vw, 170px);
}

.tools-heading {
  align-items: start;
}

.tools-heading > p {
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
  max-width: 470px;
}

.tool-layout {
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
}

.tool-intro {
  background:
    linear-gradient(rgba(217, 255, 63, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 255, 63, 0.04) 1px, transparent 1px),
    #0a0a0a;
  background-size: 32px 32px;
  border-right: 1px solid var(--line);
  min-height: 510px;
  padding: clamp(34px, 5vw, 70px);
  position: relative;
}

.tool-intro::after {
  background: var(--signal);
  bottom: 0;
  content: "";
  height: 3px;
  left: 0;
  position: absolute;
  width: 38%;
}

.tool-index {
  color: var(--signal);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
}

.tool-intro h3 {
  font-size: clamp(2.4rem, 4.2vw, 4.6rem);
  font-weight: 540;
  letter-spacing: -0.065em;
  line-height: 0.96;
  margin: 55px 0 24px;
  max-width: 430px;
}

.tool-intro > p {
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
  max-width: 420px;
}

.tool-example {
  border-top: 1px solid var(--line);
  margin-top: 62px;
  padding-top: 20px;
}

.tool-example span {
  color: var(--faint);
  display: block;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.56rem;
  letter-spacing: 0.13em;
  margin-bottom: 9px;
  text-transform: uppercase;
}

.tool-example strong {
  color: var(--signal);
  font-family: var(--font-geist-mono), monospace;
  font-size: clamp(0.86rem, 1.4vw, 1.1rem);
  font-weight: 540;
}

.calculator-card {
  background: #101010;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(34px, 6vw, 84px);
}

.calculator-fields {
  align-items: end;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
}

.calculator-field label {
  color: #c9c9c4;
  display: block;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.61rem;
  letter-spacing: 0.13em;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.calculator-input-row {
  border: 1px solid #353532;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  transition: border-color 180ms ease;
}

.calculator-input-row:focus-within {
  border-color: var(--signal);
}

.calculator-input-row input,
.calculator-input-row select {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--ink);
  font: inherit;
  min-width: 0;
  outline: 0;
}

.calculator-input-row input {
  font-family: var(--font-geist-mono), monospace;
  font-size: 1.05rem;
  padding: 17px;
  width: 100%;
}

.calculator-input-row input::placeholder {
  color: #595956;
}

.calculator-input-row select {
  border-left: 1px solid #353532;
  color: var(--signal);
  cursor: pointer;
  font-size: 0.76rem;
  padding: 0 34px 0 14px;
}

.calculator-operator {
  color: var(--signal);
  font-family: var(--font-geist-mono), monospace;
  font-size: 1.4rem;
  padding-bottom: 15px;
}

.calculator-button {
  align-items: center;
  background: var(--signal);
  border: 0;
  color: var(--black);
  cursor: pointer;
  display: flex;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  justify-content: space-between;
  margin-top: 18px;
  min-height: 54px;
  padding: 0 18px;
  transition:
    background 180ms ease,
    transform 180ms ease;
}

.calculator-button:hover,
.calculator-button:focus-visible {
  background: var(--ink);
  transform: translateY(-2px);
}

.calculator-result {
  border-bottom: 1px solid var(--line);
  border-top: 1px solid var(--line);
  display: grid;
  margin-top: 40px;
  min-height: 152px;
  padding: 23px 0;
}

.calculator-result-label {
  color: var(--faint);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  margin: 0 0 10px;
  text-transform: uppercase;
}

.calculator-result strong {
  color: var(--signal);
  font-family: var(--font-geist-mono), monospace;
  font-size: clamp(2rem, 4vw, 4rem);
  font-weight: 520;
  letter-spacing: -0.055em;
  line-height: 1;
}

.calculator-result > span {
  color: #c3c3bd;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.78rem;
  margin-top: 12px;
}

.calculator-result small {
  color: var(--faint);
  font-size: 0.68rem;
  margin-top: 8px;
}

.calculator-error {
  align-self: center;
  color: #ff8b75;
  font-size: 0.85rem;
  margin: 0;
}

.calculator-formula {
  color: var(--faint);
  font-size: 0.67rem;
  line-height: 1.6;
  margin: 20px 0 0;
}

.calculator-formula code {
  color: #c3c3bd;
  font-family: var(--font-geist-mono), monospace;
  margin: 0 5px;
}

.section-heading {
  align-items: end;
  display: flex;
  justify-content: space-between;
  margin-bottom: 54px;
}

.section-heading h2,
.build-copy h2,
.closing h2 {
  font-size: clamp(2.4rem, 4.7vw, 5.2rem);
  font-weight: 570;
  letter-spacing: -0.065em;
  line-height: 0.98;
  margin: 20px 0 0;
}

.section-heading > a {
  border-bottom: 1px solid #555550;
  color: #c9c9c4;
  font-size: 0.78rem;
  padding-bottom: 7px;
  transition:
    border-color 180ms ease,
    color 180ms ease;
}

.section-heading > a:hover,
.section-heading > a:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

.video-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.video-card {
  border: 1px solid var(--line);
  display: block;
  min-width: 0;
  transition:
    border-color 200ms ease,
    transform 200ms ease;
}

.video-card:hover,
.video-card:focus-visible {
  border-color: #6d6d67;
  transform: translateY(-4px);
}

.video-art {
  align-items: center;
  aspect-ratio: 16 / 8.7;
  display: flex;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.video-thumbnail {
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.video-arithmetic::after {
  background: linear-gradient(180deg, transparent 58%, rgba(7, 7, 7, 0.42));
  content: "";
  inset: 0;
  pointer-events: none;
  position: absolute;
}

.video-arithmetic .play-mark,
.video-arithmetic .video-number {
  z-index: 1;
}

.video-binary {
  background:
    radial-gradient(circle at 50% 50%, rgba(217, 255, 63, 0.18), transparent 28%),
    repeating-linear-gradient(90deg, transparent 0 31px, rgba(217, 255, 63, 0.08) 32px),
    #090b08;
}

.video-energy {
  background: #ecece7;
  color: #0a0a0a;
}

.video-number {
  color: rgba(255, 255, 255, 0.38);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.6rem;
  left: 18px;
  letter-spacing: 0.1em;
  position: absolute;
  top: 16px;
}

.video-energy .video-number {
  color: #777770;
}

.binary-visual {
  align-items: baseline;
  border: 1px solid rgba(217, 255, 63, 0.5);
  box-shadow: 0 0 40px rgba(217, 255, 63, 0.1);
  display: flex;
  font-family: var(--font-geist-mono), monospace;
  font-size: clamp(1.5rem, 4vw, 3.8rem);
  gap: 9px;
  padding: clamp(16px, 4vw, 36px);
}

.binary-visual small {
  color: var(--signal);
  font-size: 0.35em;
}

.binary-visual b {
  color: var(--signal);
  font-weight: 400;
  margin: 0 8px;
}

.energy-visual {
  align-items: center;
  display: flex;
  font-size: clamp(0.72rem, 2vw, 1.55rem);
  gap: clamp(7px, 1.6vw, 20px);
}

.energy-visual b {
  color: #e4a100;
}

.energy-visual strong {
  color: #78a925;
}

.energy-visual em {
  color: #111;
  font-style: normal;
  font-size: 1.6em;
}

.mini-bolt {
  align-items: center;
  background: #181818;
  border-radius: 50%;
  color: var(--signal);
  display: flex;
  font-family: Georgia, serif;
  font-size: 2.3em;
  height: 2em;
  justify-content: center;
  width: 2em;
}

.battery {
  border: 3px solid #181818;
  display: flex;
  flex-direction: column-reverse;
  gap: 2px;
  margin-left: 10px;
  padding: 3px;
  position: relative;
}

.battery::before {
  background: #181818;
  content: "";
  height: 4px;
  left: 32%;
  position: absolute;
  top: -7px;
  width: 36%;
}

.battery i {
  background: #78a925;
  height: 8px;
  width: 24px;
}

.play-mark {
  align-items: center;
  background: var(--signal);
  bottom: 16px;
  color: var(--black);
  display: flex;
  font-size: 0.68rem;
  height: 36px;
  justify-content: center;
  position: absolute;
  right: 16px;
  width: 36px;
}

.video-copy {
  border-top: 1px solid var(--line);
  padding: 24px 24px 28px;
}

.video-copy > p {
  color: var(--signal);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.62rem;
  letter-spacing: 0.13em;
  margin: 0 0 13px;
  text-transform: uppercase;
}

.video-copy h3 {
  font-size: clamp(1.35rem, 2.1vw, 2rem);
  font-weight: 540;
  letter-spacing: -0.045em;
  margin: 0;
}

.video-copy > span {
  color: var(--muted);
  display: block;
  font-size: 0.87rem;
  line-height: 1.55;
  margin-top: 15px;
  max-width: 500px;
}

.resources {
  background: #0a0a0a;
}

.resources-heading {
  align-items: start;
}

.resources-heading > p {
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
  max-width: 470px;
}

.resource-card {
  background:
    linear-gradient(rgba(217, 255, 63, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 255, 63, 0.035) 1px, transparent 1px),
    var(--panel);
  background-size: 28px 28px;
  border: 1px solid var(--line);
  display: grid;
  gap: clamp(40px, 8vw, 130px);
  grid-template-columns: minmax(0, 1fr) auto;
  min-height: 300px;
  padding: clamp(30px, 4.5vw, 62px);
  position: relative;
}

.resource-card::before {
  background: var(--signal);
  content: "";
  height: 3px;
  left: 0;
  position: absolute;
  top: 0;
  width: 96px;
}

.resource-copy {
  align-self: center;
  max-width: 760px;
}

.resource-meta {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.resource-meta > span:first-child {
  color: var(--signal);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.64rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.resource-status {
  border: 1px solid #4a4a45;
  color: #b7b7b2;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  padding: 7px 9px;
  text-transform: uppercase;
}

.resource-card h3 {
  font-size: clamp(2rem, 4vw, 4.4rem);
  font-weight: 560;
  letter-spacing: -0.06em;
  line-height: 0.98;
  margin: 30px 0 0;
}

.resource-copy > p {
  color: var(--muted);
  line-height: 1.65;
  margin: 24px 0 0;
  max-width: 620px;
}

.resource-actions {
  align-self: end;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 190px;
}

.resource-actions > a {
  align-items: center;
  display: flex;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.67rem;
  justify-content: space-between;
  letter-spacing: 0.08em;
  min-height: 48px;
  padding: 0 16px;
  text-transform: uppercase;
}

.resource-actions > .resource-download {
  background: var(--signal);
  color: var(--black);
  font-weight: 700;
  transition:
    background 180ms ease,
    transform 180ms ease;
}

.resource-actions > .resource-download:hover,
.resource-actions > .resource-download:focus-visible {
  background: var(--ink);
  transform: translateY(-2px);
}

.resource-actions > .resource-watch {
  border: 1px solid #3b3b38;
  color: #b7b7b2;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.resource-actions > .resource-watch:hover,
.resource-actions > .resource-watch:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
  transform: translateY(-2px);
}

.roadmap-heading {
  align-items: start;
}

.roadmap-heading > p {
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
  max-width: 450px;
}

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

.roadmap-step {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(60px, 0.16fr) 1fr;
  padding: 36px 0;
  transition: background 180ms ease;
}

.roadmap-step:hover {
  background: rgba(255, 255, 255, 0.018);
}

.roadmap-number {
  color: var(--signal);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding-top: 8px;
}

.roadmap-title-row {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: space-between;
}

.roadmap-copy h3 {
  font-size: clamp(1.7rem, 3vw, 3.1rem);
  font-weight: 510;
  letter-spacing: -0.055em;
  margin: 0;
}

.status {
  border: 1px solid #353532;
  color: var(--muted);
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.54rem;
  letter-spacing: 0.12em;
  padding: 8px 10px;
  text-transform: uppercase;
}

.roadmap-copy > p {
  color: var(--muted);
  line-height: 1.6;
  margin: 17px 0 20px;
  max-width: 680px;
}

.roadmap-copy ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.roadmap-copy li {
  background: #121212;
  color: #aaa9a4;
  font-size: 0.72rem;
  padding: 8px 11px;
}

.build-card {
  background: var(--signal);
  color: var(--black);
  display: grid;
  gap: clamp(50px, 8vw, 120px);
  grid-template-columns: 0.85fr 1.15fr;
  padding: clamp(38px, 6vw, 90px);
}

.build-copy .section-kicker {
  color: #3f4b0d;
}

.build-copy h2 {
  font-size: clamp(2.5rem, 4.7vw, 4.8rem);
}

.build-copy > p:not(.section-kicker) {
  color: #32390f;
  line-height: 1.62;
  margin: 28px 0 0;
  max-width: 540px;
}

.project-note {
  border-left: 3px solid var(--black);
  display: grid;
  gap: 7px;
  margin-top: 30px;
  max-width: 540px;
  padding: 4px 0 4px 16px;
}

.project-note strong {
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.project-note span {
  color: #32390f;
  font-size: 0.78rem;
  line-height: 1.55;
}

.build-status {
  align-items: center;
  display: flex;
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.61rem;
  font-weight: 700;
  gap: 10px;
  letter-spacing: 0.12em;
  margin-top: 38px;
  text-transform: uppercase;
}

.build-status .live-dot {
  background: var(--black);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.1);
}

.build-map {
  border-top: 1px solid rgba(0, 0, 0, 0.28);
}

.build-node {
  align-items: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.28);
  display: grid;
  gap: 18px;
  grid-template-columns: 42px 1fr auto;
  min-height: 92px;
}

.build-node > span {
  font-family: var(--font-geist-mono), monospace;
  font-size: 0.62rem;
  font-weight: 700;
}

.build-node p {
  font-size: 0.96rem;
  font-weight: 620;
  margin: 0;
}

.build-node small {
  color: #50591f;
  display: block;
  font-size: 0.68rem;
  font-weight: 450;
  margin-top: 4px;
}

.build-node b {
  align-items: center;
  border: 1px solid rgba(0, 0, 0, 0.55);
  display: flex;
  font-size: 0.76rem;
  height: 29px;
  justify-content: center;
  width: 29px;
}

.build-node.active b {
  background: var(--black);
  color: var(--signal);
}

.closing {
  align-items: center;
  display: flex;
  flex-direction: column;
  min-height: 82vh;
  justify-content: center;
  padding-bottom: 110px;
  padding-top: 110px;
  text-align: center;
}

.closing .logo-mark.full {
  margin-bottom: 20px;
  width: 150px;
}

.closing h2 {
  max-width: 850px;
}

.closing > p:not(.section-kicker) {
  color: var(--muted);
  line-height: 1.65;
  margin: 28px 0 36px;
  max-width: 580px;
}

footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: grid;
  font-size: 0.72rem;
  gap: 20px;
  grid-template-columns: 1fr auto 1fr;
  min-height: 110px;
  padding: 24px 4.5vw;
}

footer .brand {
  color: var(--ink);
}

footer > p {
  margin: 0;
}

footer > span {
  justify-self: end;
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-header nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-copy {
    padding-bottom: 70px;
  }

  .hero-system {
    justify-self: center;
    width: min(100%, 630px);
  }

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

  .section-heading,
  .roadmap-heading {
    align-items: start;
    flex-direction: column;
    gap: 26px;
  }

  .video-grid,
  .build-card,
  .tool-layout,
  .resource-card {
    grid-template-columns: 1fr;
  }

  .resource-actions {
    align-self: start;
    flex-direction: row;
    min-width: 0;
  }

  .resource-actions > a {
    min-width: 190px;
  }

  .tool-intro {
    border-bottom: 1px solid var(--line);
    border-right: 0;
    min-height: auto;
  }

  footer {
    grid-template-columns: 1fr 1fr;
  }

  footer > p {
    display: none;
  }
}

@media (max-width: 600px) {
  .site-header {
    height: 68px;
  }

  .hero {
    min-height: calc(100svh - 68px);
    padding-bottom: 60px;
    padding-top: 70px;
  }

  .hero h1 {
    font-size: clamp(3.1rem, 16vw, 5rem);
    line-height: 0.91;
    margin-top: 28px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-system {
    margin-top: 10px;
  }

  .section-heading {
    margin-bottom: 36px;
  }

  .video-grid {
    gap: 16px;
  }

  .resource-actions {
    flex-direction: column;
  }

  .resource-actions > a {
    width: 100%;
  }

  .calculator-fields {
    align-items: stretch;
    grid-template-columns: 1fr;
  }

  .calculator-operator {
    padding: 0;
    text-align: center;
  }

  .video-art {
    aspect-ratio: 16 / 10;
  }

  .roadmap-step {
    gap: 10px;
    grid-template-columns: 38px 1fr;
  }

  .roadmap-title-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .build-card {
    margin-left: -4.5vw;
    margin-right: -4.5vw;
  }

  footer {
    grid-template-columns: 1fr;
  }

  footer > span {
    justify-self: start;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}