:root {
  color-scheme: light dark;
  --page: #f2f4f7;
  --surface: #e7eaf0;
  --surface-strong: #d9dde5;
  --ink: #17191e;
  --muted: #5e6470;
  --line: #c8cdd6;
  --accent: #244cce;
  --accent-hover: #193cae;
  --accent-ink: #f7f8fb;
  --dark-panel: #171a20;
  --dark-panel-ink: #f0f2f5;
  --content: 1240px;
  --radius: 14px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #111318;
    --surface: #191c23;
    --surface-strong: #232731;
    --ink: #eceef2;
    --muted: #a2a8b3;
    --line: #303540;
    --accent: #6d8cff;
    --accent-hover: #88a0ff;
    --accent-ink: #0d1222;
    --dark-panel: #e2e5eb;
    --dark-panel-ink: #15171c;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: "Avenir Next", Avenir, "Segoe UI Variable", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

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

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

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

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  transform: translateY(-160%);
}

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

.site-header {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1rem;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 30px;
  height: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
}

.brand-mark i {
  align-self: end;
  height: 45%;
  border-radius: 3px;
  background: var(--ink);
}

.brand-mark i:nth-child(2) {
  height: 100%;
  background: var(--accent);
}

.brand-mark i:nth-child(3) {
  height: 70%;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 650;
}

nav a,
.text-link,
.site-footer a {
  transition: color 180ms ease;
}

nav a:hover,
.text-link:hover,
.site-footer a:hover {
  color: var(--accent);
}

.nav-source {
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
}

.hero {
  min-height: calc(100dvh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
  gap: clamp(2.5rem, 7vw, 7rem);
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-copy,
.hero-visual {
  align-self: start;
}

.eyebrow,
.capability > span,
.foundation span {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.69rem;
  font-weight: 650;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 1.4rem;
  color: var(--accent);
}

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

h1 {
  max-width: 690px;
  margin-bottom: 1.5rem;
  font-size: clamp(3.4rem, 5.2vw, 5rem);
  font-weight: 650;
  line-height: 0.94;
  letter-spacing: -0.075em;
}

h2 {
  margin-bottom: 1.2rem;
  font-size: clamp(2.35rem, 4.2vw, 4.6rem);
  font-weight: 630;
  line-height: 1;
  letter-spacing: -0.065em;
}

h3 {
  margin-bottom: 0.8rem;
  font-size: clamp(1.35rem, 2vw, 2rem);
  font-weight: 650;
  line-height: 1.1;
  letter-spacing: -0.045em;
}

.hero-lede {
  max-width: 510px;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: clamp(1.03rem, 1.4vw, 1.2rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 750;
  white-space: nowrap;
  transition: transform 220ms var(--ease), background 220ms ease, border-color 220ms ease;
}

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

.button:active {
  transform: translateY(1px);
}

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

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

.button-secondary {
  background: transparent;
  color: var(--ink);
}

.button-secondary:hover {
  border-color: var(--ink);
}

.hero-visual,
.problem-visual {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
}

.hero-visual {
  margin: 0;
  aspect-ratio: 3 / 2;
  box-shadow: 0 30px 80px rgb(27 36 65 / 0.14);
}

.hero-visual img,
.problem-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.foundation {
  border-block: 1px solid var(--line);
}

.foundation-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.foundation-grid > div {
  min-height: 126px;
  display: grid;
  align-content: center;
  gap: 0.45rem;
  padding: 1.25rem clamp(1rem, 3vw, 2rem);
  border-right: 1px solid var(--line);
}

.foundation-grid > div:first-child {
  padding-left: 0;
}

.foundation-grid > div:last-child {
  border-right: 0;
}

.foundation span,
.capability > span {
  color: var(--muted);
}

.foundation strong {
  font-size: 0.95rem;
  font-weight: 700;
}

.problem,
.process,
.capabilities,
.code-section,
.closing {
  padding-block: clamp(5.5rem, 10vw, 10rem);
}

.problem {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  align-items: end;
  gap: clamp(2rem, 7vw, 7rem);
}

.problem-visual {
  min-height: 560px;
  margin: 0;
}

.problem-copy {
  padding-bottom: 1.5rem;
}

.problem-copy p,
.section-heading p,
.code-copy p,
.closing p {
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.6vw, 1.2rem);
}

.text-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 750;
}

.text-link::after {
  content: "  ↗";
}

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

.section-heading {
  max-width: 780px;
  margin-bottom: clamp(3rem, 6vw, 5.5rem);
}

.process-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: process;
}

.process-flow li {
  position: relative;
  min-height: 230px;
  padding: 2.2rem 2rem 1rem 0;
  border-top: 2px solid var(--line);
  counter-increment: process;
}

.process-flow li::before {
  content: counter(process);
  position: absolute;
  top: -1rem;
  left: 0;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--page);
  color: var(--accent);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 750;
}

.process-flow li:first-child {
  border-color: var(--accent);
}

.process-flow li > span {
  display: block;
  margin-bottom: 1rem;
  font-size: 1.05rem;
  font-weight: 750;
}

.process-flow p {
  max-width: 250px;
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

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

.capability-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  grid-template-areas:
    "large accent"
    "large plain"
    "dark dark";
  gap: 1rem;
}

.capability {
  min-height: 280px;
  padding: clamp(1.6rem, 4vw, 3rem);
  border-radius: var(--radius);
  background: var(--surface);
}

.capability p {
  max-width: 560px;
  margin-bottom: 0;
  color: var(--muted);
}

.capability > span,
.capability-large > div > span {
  display: block;
  margin-bottom: 2.2rem;
  color: var(--muted);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.69rem;
  font-weight: 650;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.capability-large {
  grid-area: large;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 2.5rem;
  padding: 0;
  overflow: hidden;
}

.capability-large > div {
  padding: clamp(1.6rem, 4vw, 3rem) clamp(1.6rem, 4vw, 3rem) 0;
}

.capability-large img {
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
}

.capability-accent {
  grid-area: accent;
  background: var(--accent);
  color: var(--accent-ink);
}

.capability-accent > span,
.capability-accent p {
  color: var(--accent-ink);
}

.capability-grid > .capability:not(.capability-large, .capability-accent, .capability-dark) {
  grid-area: plain;
}

.capability-dark {
  grid-area: dark;
  min-height: 250px;
  display: grid;
  grid-template-columns: 0.35fr 0.65fr;
  align-items: start;
  gap: 2rem;
  background: var(--dark-panel);
  color: var(--dark-panel-ink);
}

.capability-dark > span,
.capability-dark p {
  color: var(--dark-panel-ink);
}

.code-section {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  align-items: start;
  gap: clamp(3rem, 8vw, 8rem);
}

.code-copy {
  position: sticky;
  top: 2rem;
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border-radius: var(--radius);
  background: #15171c;
  color: #d8dbe2;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.07);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: clamp(0.73rem, 1.3vw, 0.86rem);
  line-height: 1.8;
}

code span {
  color: #7e9aff;
}

.closing {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 3rem;
  border-top: 1px solid var(--line);
}

.closing h2 {
  max-width: 820px;
}

.site-footer {
  min-height: 110px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

html.js .reveal {
  opacity: 0;
  transform: translateY(28px);
}

html.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 720ms var(--ease), transform 720ms var(--ease);
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy {
    animation: enter 760ms var(--ease) both;
  }

  .hero-visual {
    animation: enter 880ms 100ms var(--ease) both;
  }

  @keyframes enter {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

@media (max-width: 900px) {
  .hero,
  .problem,
  .code-section {
    grid-template-columns: 1fr;
  }

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

  .hero-copy {
    max-width: 720px;
  }

  .problem-visual {
    min-height: 420px;
  }

  .process-flow {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 2.5rem;
  }

  .capability-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "large large"
      "accent plain"
      "dark dark";
  }

  .code-copy {
    position: static;
  }

  .closing {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(calc(100% - 2rem), var(--content));
  }

  .site-header {
    min-height: 64px;
  }

  nav a:not(.nav-source) {
    display: none;
  }

  .nav-source {
    padding: 0.45rem 0.65rem;
  }

  .hero {
    padding-block: 3.5rem 4.5rem;
  }

  h1 {
    font-size: clamp(2.8rem, 13vw, 4rem);
  }

  .hero-visual {
    aspect-ratio: 4 / 3;
  }

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

  .foundation-grid > div {
    min-height: 110px;
    padding: 1rem;
    border-bottom: 1px solid var(--line);
  }

  .foundation-grid > div:nth-child(2) {
    border-right: 0;
  }

  .foundation-grid > div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .foundation-grid > div:first-child {
    padding-left: 0;
  }

  .problem,
  .process,
  .capabilities,
  .code-section,
  .closing {
    padding-block: 5.5rem;
  }

  .problem-visual {
    min-height: 360px;
  }

  .process-flow {
    grid-template-columns: 1fr;
    row-gap: 1rem;
  }

  .process-flow li {
    min-height: auto;
    padding: 2rem 0 1.5rem 3rem;
  }

  .process-flow li::before {
    top: 1.85rem;
  }

  .process-flow p {
    max-width: 34rem;
  }

  .capability-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "large"
      "accent"
      "plain"
      "dark";
  }

  .capability-dark {
    grid-template-columns: 1fr;
  }

  pre {
    margin-inline: -0.5rem;
  }

  .site-footer {
    grid-template-columns: 1fr;
    align-content: center;
    gap: 0.25rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}