:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --surface: #111720;
  --surface-soft: #151d27;
  --text: #edf2f7;
  --muted: #9ca9b7;
  --line: rgba(237, 242, 247, 0.14);
  --line-strong: rgba(237, 242, 247, 0.28);
  --accent: #8fe3cf;
  --accent-strong: #b7f7e8;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.28);
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 85% 12%, rgba(143, 227, 207, 0.09), transparent 26rem),
    linear-gradient(180deg, #0b0f14 0%, #0a0e13 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.024) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 72%);
  pointer-events: none;
}

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

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

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 20;
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

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

.site-header,
main,
footer {
  width: min(calc(100% - 40px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1.02rem;
  font-weight: 720;
  letter-spacing: -0.02em;
}

.brand img {
  width: 28px;
  height: 28px;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
}

nav a {
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 160ms ease;
}

nav a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  min-height: calc(100vh - 82px);
  padding-block: clamp(5rem, 10vw, 9rem);
}

.eyebrow,
.section-index {
  margin: 0 0 1.25rem;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1,
h2 {
  text-wrap: balance;
}

h1 {
  max-width: 820px;
  margin-bottom: 1.5rem;
  font-size: clamp(3.7rem, 8vw, 7.8rem);
  font-weight: 760;
  letter-spacing: -0.072em;
  line-height: 0.92;
}

.lede {
  max-width: 690px;
  margin-bottom: 2.3rem;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.32rem);
  line-height: 1.6;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.74rem 1.05rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

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

.button-primary {
  background: var(--accent-strong);
  color: #092019;
}

.button-primary:hover {
  background: #d2fff4;
}

.button-secondary {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

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

.hero-system {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.3rem);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.016));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-system::after {
  position: absolute;
  right: -30%;
  bottom: -42%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(143, 227, 207, 0.1);
  filter: blur(22px);
  content: "";
}

.system-node {
  position: relative;
  z-index: 1;
  padding: 0.86rem 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(11, 15, 20, 0.72);
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.86rem;
}

.system-node-guarded {
  border-color: rgba(143, 227, 207, 0.45);
  color: var(--accent-strong);
}

.system-line {
  width: 1px;
  height: 26px;
  margin-left: 1.35rem;
  background: linear-gradient(var(--line-strong), var(--accent));
}

.section {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(2.2rem, 7vw, 7rem);
  padding-block: clamp(5rem, 9vw, 8rem);
  border-top: 1px solid var(--line);
}

.section h2,
.closing h2 {
  margin-bottom: 0;
  font-size: clamp(2.3rem, 4.8vw, 4.8rem);
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.section-copy {
  max-width: 750px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.5vw, 1.18rem);
}

.section-copy p + p {
  margin-top: 1.6rem;
}

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

.principle-grid article {
  min-height: 255px;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.02);
}

.principle-number {
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
}

.principle-grid h3,
.work-card h3 {
  margin: 3rem 0 0.85rem;
  font-size: 1.24rem;
  letter-spacing: -0.025em;
}

.principle-grid p,
.work-card p {
  color: var(--muted);
}

.work-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: end;
  padding: clamp(1.6rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
}

.work-card h3 {
  margin-top: 1.6rem;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
}

.work-card a {
  color: var(--accent-strong);
  font-size: 0.92rem;
  font-weight: 700;
  white-space: nowrap;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.status span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(143, 227, 207, 0.09);
}

.closing {
  padding-block: clamp(7rem, 15vw, 13rem);
  border-top: 1px solid var(--line);
  text-align: center;
}

.closing h2 {
  max-width: 900px;
  margin-inline: auto;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
}

footer p {
  margin-bottom: 0;
}

@media (max-width: 840px) {
  .site-header {
    align-items: flex-start;
    min-height: auto;
    padding-block: 1.2rem;
  }

  nav {
    display: none;
  }

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

  .hero {
    min-height: auto;
    gap: 4rem;
  }

  .hero-system {
    max-width: 520px;
  }

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

@media (max-width: 620px) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 28px), var(--max-width));
  }

  h1 {
    font-size: clamp(3.25rem, 17vw, 5.2rem);
  }

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

  .principle-grid article {
    min-height: 220px;
  }

  footer {
    flex-direction: column;
    gap: 0.45rem;
  }
}

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

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