:root {
  color-scheme: light;
  --paper: #f4f0e6;
  --paper-deep: #e8e1d2;
  --ink: #171916;
  --ink-soft: #50544d;
  --line: rgba(23, 25, 22, 0.18);
  --orange: #ff5a2f;
  --orange-dark: #b73516;
  --green: #143c31;
  --green-soft: #1f5848;
  --white: #fffdf8;
  --mono:
    "SFMono-Regular", Consolas, "Liberation Mono", ui-monospace, monospace;
  --sans:
    Inter, "SF Pro Display", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --max: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background:
    radial-gradient(
      circle at 82% 8%,
      rgba(255, 90, 47, 0.13),
      transparent 28rem
    ),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: clip;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
  content: "";
  pointer-events: none;
}

a {
  color: inherit;
}

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

:focus-visible {
  border-radius: 0.15rem;
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-180%);
}

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

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  width: min(calc(100% - 2 * var(--gutter)), var(--max));
  min-height: 5.5rem;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  font-size: 1.06rem;
  font-weight: 760;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  width: 2.25rem;
  height: 2.25rem;
  margin-right: 0.55rem;
  fill: currentColor;
}

.brand-spark {
  fill: var(--orange);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.3rem);
}

.site-nav a {
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 620;
  letter-spacing: 0.015em;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--ink);
}

.site-nav .nav-github {
  display: inline-flex;
  min-height: 2.65rem;
  padding: 0 1rem;
  border: 1px solid var(--ink);
  color: var(--ink);
  align-items: center;
  gap: 0.5rem;
}

.hero {
  display: grid;
  width: min(calc(100% - 2 * var(--gutter)), var(--max));
  min-height: 46rem;
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 9rem) 0 6rem;
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
  grid-template-columns: minmax(0, 1.15fr) minmax(20rem, 0.85fr);
}

.hero-copy {
  max-width: 47rem;
}

.eyebrow,
.section-number {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.status-dot {
  position: relative;
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: var(--orange);
}

.status-dot::after {
  position: absolute;
  inset: -0.26rem;
  border: 1px solid var(--orange);
  border-radius: inherit;
  content: "";
  opacity: 0.45;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(3.6rem, 7.8vw, 7.2rem);
  font-weight: 720;
  letter-spacing: -0.075em;
  line-height: 0.92;
}

h1 em {
  display: block;
  color: var(--orange-dark);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
}

.hero-lede {
  max-width: 41rem;
  margin: 2.2rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 1.8vw, 1.3rem);
  line-height: 1.55;
}

.release-context {
  max-width: 41rem;
  margin: 1.2rem 0 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.6;
}

.release-context a {
  color: var(--ink);
  font-weight: 700;
  text-underline-offset: 0.18em;
}

.release-context code {
  color: var(--ink);
  font-family: inherit;
}

.hero-actions {
  display: flex;
  margin-top: 2.4rem;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  min-height: 3.25rem;
  padding: 0 1.25rem;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 720;
  text-decoration: none;
  transition:
    background-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

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

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

.button-primary:hover {
  background: var(--orange-dark);
}

.button-secondary {
  border: 1px solid var(--ink);
  background: transparent;
}

.button-secondary:hover {
  background: var(--white);
}

.hero-facts {
  display: flex;
  margin: 2.5rem 0 0;
  padding: 0;
  color: var(--ink-soft);
  flex-wrap: wrap;
  font-size: 0.76rem;
  gap: 0.75rem 1.3rem;
  list-style: none;
}

.hero-facts li {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.hero-facts li::before {
  width: 0.28rem;
  height: 0.28rem;
  border-radius: 50%;
  background: var(--green-soft);
  content: "";
}

.route-visual {
  position: relative;
  padding: 1.1rem;
  border: 1px solid var(--ink);
  background: rgba(255, 253, 248, 0.52);
  box-shadow: 1rem 1rem 0 var(--paper-deep);
}

.route-heading {
  display: flex;
  min-height: 2.8rem;
  padding: 0 0.35rem 0.75rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.69rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.route-live {
  color: var(--green-soft);
}

.route-live::before {
  display: inline-block;
  width: 0.4rem;
  height: 0.4rem;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.route-node {
  display: grid;
  min-height: 5.5rem;
  padding: 1rem;
  border: 1px solid var(--line);
  background: var(--white);
  align-items: center;
  grid-template-columns: 2.5rem 1fr;
}

.route-node strong,
.route-node span {
  display: block;
}

.route-node strong {
  font-size: 1rem;
  letter-spacing: -0.025em;
}

.route-node div span {
  margin-top: 0.05rem;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.67rem;
}

.route-index {
  color: var(--orange-dark);
  font-family: var(--mono);
  font-size: 0.66rem;
}

.route-node-haya {
  border-color: var(--green);
  background: var(--green);
  color: var(--white);
}

.route-node-haya .route-index,
.route-node-haya div span {
  color: #bce2d4;
}

.route-line {
  display: grid;
  height: 2rem;
  place-items: center;
}

.route-line span {
  width: 1px;
  height: 100%;
  background: var(--ink);
}

.route-detail {
  display: flex;
  padding: 0.7rem 0 0;
  color: var(--ink-soft);
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.6rem;
}

.route-note {
  margin: 1rem 0 0;
  color: var(--ink-soft);
  font-size: 0.75rem;
  line-height: 1.45;
}

.signal-strip {
  display: flex;
  min-height: 5rem;
  padding: 0 var(--gutter);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  align-items: center;
  justify-content: center;
  gap: clamp(1.5rem, 5vw, 5rem);
  overflow: hidden;
}

.signal-strip p {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.signal-strip p::before {
  margin-right: clamp(1.5rem, 5vw, 5rem);
  color: var(--orange);
  content: "✦";
}

.section {
  width: min(calc(100% - 2 * var(--gutter)), var(--max));
  margin: 0 auto;
  padding: clamp(6rem, 11vw, 10rem) 0;
}

.sdk-section {
  display: grid;
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
  grid-template-columns: minmax(0, 0.8fr) minmax(30rem, 1.2fr);
}

.section-intro h2,
.quickstart-copy h2,
.boundary-section h2,
.support-section h2,
.template-copy h2 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 5rem);
  font-weight: 690;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.section-intro > p:not(.section-number),
.quickstart-copy > p:not(.section-number),
.template-copy > p:not(.section-number) {
  max-width: 38rem;
  margin: 1.7rem 0 0;
  color: var(--ink-soft);
  font-size: 1.04rem;
}

.text-link {
  display: inline-flex;
  margin-top: 1.7rem;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid currentColor;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 730;
  text-decoration: none;
}

.text-link:hover {
  color: var(--orange-dark);
}

.section-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.5rem;
}

.code-window {
  min-width: 0;
  border: 1px solid var(--ink);
  background: #171a18;
  color: #e8eee8;
  box-shadow: 1rem 1rem 0 var(--orange);
}

.code-window-bar {
  display: flex;
  min-height: 3.2rem;
  padding: 0 1rem;
  border-bottom: 1px solid #3c413d;
  color: #afb6af;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.copy-button {
  padding: 0.35rem 0.65rem;
  border: 1px solid #656d67;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
}

.copy-button:hover {
  border-color: var(--orange);
  color: var(--white);
}

.code-window pre {
  margin: 0;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: clamp(0.71rem, 1.35vw, 0.88rem);
  line-height: 1.8;
  tab-size: 2;
}

.code-keyword {
  color: #ff9678;
}

.code-string {
  color: #b7d98b;
}

.code-property {
  color: #99c9dc;
}

.code-function {
  color: #f1cf79;
}

.copy-status {
  min-height: 0;
  margin: 0;
}

.copy-status:not(:empty) {
  padding: 0 1rem 0.8rem;
  color: #b7d98b;
  font-family: var(--mono);
  font-size: 0.67rem;
}

.ownership-section {
  border-top: 1px solid var(--line);
}

.ownership-section > .section-intro {
  display: grid;
  align-items: start;
  gap: 2rem;
  grid-template-columns: 1fr 2fr;
}

.ownership-section .section-number {
  margin-top: 0.6rem;
}

.principles {
  margin-top: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--ink);
}

.principles article {
  display: grid;
  min-height: 12rem;
  padding: 2.4rem 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
  gap: 2rem;
  grid-template-columns: 0.45fr 1.05fr 1.5fr;
}

.principles article > span {
  color: var(--orange-dark);
  font-family: var(--mono);
  font-size: 0.69rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.principles h3 {
  max-width: 18ch;
  margin: 0;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  letter-spacing: -0.045em;
  line-height: 1.1;
}

.principles p {
  max-width: 38rem;
  margin: 0;
  color: var(--ink-soft);
}

.template-section {
  width: 100%;
  max-width: none;
  padding-right: var(--gutter);
  padding-left: var(--gutter);
  background: var(--paper-deep);
}

.template-stage {
  display: grid;
  width: min(100%, var(--max));
  margin: 0 auto;
  gap: clamp(4rem, 9vw, 9rem);
  grid-template-columns: minmax(0, 0.9fr) minmax(28rem, 1.1fr);
}

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

.template-flow li {
  display: grid;
  min-height: 8rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
  gap: 1.2rem;
  grid-template-columns: 3rem 1fr;
}

.template-flow li > span {
  color: var(--orange-dark);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.template-flow strong {
  display: block;
  margin-bottom: 0.55rem;
  font-size: 1.12rem;
}

.template-flow code {
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: clamp(0.65rem, 1.3vw, 0.78rem);
}

.template-footnote {
  width: min(100%, var(--max));
  margin: clamp(3rem, 6vw, 5rem) auto 0;
  padding-top: 1.3rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.69rem;
}

.quickstart-section {
  display: grid;
  align-items: end;
  gap: 2rem 5rem;
  grid-template-columns: minmax(0, 0.9fr) minmax(28rem, 1.1fr);
}

.quickstart-command {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 5.2rem;
  padding: 1.15rem 1.25rem;
  background: var(--green);
  color: var(--white);
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.quickstart-command > div {
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
}

.quickstart-command code {
  font-family: var(--mono);
  font-size: clamp(0.72rem, 1.5vw, 0.9rem);
}

.terminal-prompt {
  margin-right: 0.75rem;
  color: #8dd2b8;
  font-family: var(--mono);
}

.copy-button-light {
  border-color: #8dd2b8;
  color: var(--white);
  flex: 0 0 auto;
}

.quickstart-command .copy-status:not(:empty) {
  position: absolute;
  top: 100%;
  right: 0;
  padding: 0.3rem 0;
  color: var(--green);
}

.text-link-light {
  margin-top: 0;
  justify-self: start;
}

.boundary-section {
  display: grid;
  border-top: 1px solid var(--line);
  gap: clamp(3rem, 9vw, 9rem);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.boundary-copy p {
  margin: 0 0 1.4rem;
  color: var(--ink-soft);
  font-size: 1.04rem;
}

.support-section {
  padding: clamp(6rem, 11vw, 10rem) var(--gutter);
  background: var(--green);
  color: var(--white);
}

.support-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.section-number-light {
  color: #9ac8b7;
}

.support-section h2 {
  max-width: 18ch;
  font-size: clamp(3rem, 7vw, 7rem);
}

.support-section h2::first-line {
  color: #c9e8dc;
}

.support-section > div > p:not(.section-number) {
  max-width: 44rem;
  margin: 2rem 0 0;
  color: #c9d7d1;
  font-size: 1.05rem;
}

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

.button-light {
  background: var(--white);
  color: var(--green);
}

.button-light:hover {
  background: var(--orange);
  color: var(--ink);
}

.support-link {
  color: #dbece5;
  font-size: 0.82rem;
  font-weight: 700;
  text-underline-offset: 0.25rem;
}

.support-section small {
  display: block;
  max-width: 44rem;
  margin-top: 2rem;
  color: #8fb4a7;
  font-family: var(--mono);
  font-size: 0.65rem;
  line-height: 1.6;
}

.site-footer {
  display: grid;
  width: min(calc(100% - 2 * var(--gutter)), var(--max));
  min-height: 9rem;
  margin: 0 auto;
  align-items: center;
  gap: 2rem;
  grid-template-columns: 0.7fr 1.6fr 0.7fr;
}

.brand-footer {
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.72rem;
  text-align: center;
}

.site-footer > div {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
}

.site-footer > div a {
  color: var(--ink-soft);
  font-size: 0.69rem;
  font-weight: 700;
  text-underline-offset: 0.2rem;
}

.not-found {
  display: flex;
  width: min(calc(100% - 2 * var(--gutter)), 52rem);
  min-height: 100vh;
  margin: 0 auto;
  padding: 3rem 0;
  align-items: flex-start;
  justify-content: center;
  flex-direction: column;
}

.not-found .section-number {
  margin-top: 6rem;
}

.not-found h1 {
  max-width: 10ch;
  margin-bottom: 2.5rem;
  font-size: clamp(3rem, 9vw, 6.5rem);
}

@media (max-width: 900px) {
  .hero,
  .sdk-section,
  .template-stage,
  .quickstart-section,
  .boundary-section {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 5rem;
  }

  .route-visual {
    width: min(100%, 34rem);
  }

  .sdk-section {
    gap: 4rem;
  }

  .ownership-section > .section-intro {
    grid-template-columns: 1fr;
  }

  .principles article {
    grid-template-columns: 0.3fr 0.8fr 1.2fr;
  }

  .quickstart-section {
    align-items: start;
  }

  .site-footer {
    padding: 2rem 0;
    grid-template-columns: 1fr;
  }

  .site-footer p {
    text-align: left;
  }

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

@media (max-width: 680px) {
  .site-header {
    min-height: 4.7rem;
  }

  .site-nav > a:not(.nav-github) {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 4.5rem 0 5rem;
  }

  h1 {
    font-size: clamp(3.3rem, 16vw, 5.2rem);
  }

  .hero-facts {
    display: grid;
  }

  .route-visual {
    width: calc(100% - 0.7rem);
    box-shadow: 0.7rem 0.7rem 0 var(--paper-deep);
  }

  .signal-strip {
    justify-content: flex-start;
    overflow-x: auto;
  }

  .signal-strip p:first-child::before {
    display: none;
  }

  .section {
    padding-top: 5.5rem;
    padding-bottom: 5.5rem;
  }

  .sdk-section,
  .template-stage,
  .quickstart-section {
    gap: 3.5rem;
  }

  .code-window {
    width: calc(100% - 0.55rem);
    box-shadow: 0.55rem 0.55rem 0 var(--orange);
  }

  .principles article {
    min-height: 0;
    grid-template-columns: 2.5rem 1fr;
  }

  .principles article p {
    grid-column: 2;
  }

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

  .template-flow code {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .quickstart-command {
    align-items: flex-start;
    flex-direction: column;
  }

  .boundary-section {
    grid-template-columns: 1fr;
  }

  .support-section h2 br {
    display: none;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy,
  .route-visual {
    animation: enter 650ms cubic-bezier(0.2, 0.75, 0.2, 1) both;
  }

  .route-visual {
    animation-delay: 120ms;
  }

  @keyframes enter {
    from {
      opacity: 0;
      transform: translateY(1rem);
    }

    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

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

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