:root {
  --canvas: #0a0a0a;
  --canvas-card: #151515;
  --canvas-soft: #1a1c20;
  --ink: #fff;
  --body: #dadbdf;
  --mute: #7d8187;
  --line: #212327;
  --blue: #209ee1;
  --blue-soft: #a0c3ec;
  --orange: #ff7a17;
  --purple: #7c3aed;
  --sans: Inter, "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

html::after {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  width: calc(var(--scroll-progress, 0) * 100%);
  height: 2px;
  background: var(--blue);
  content: "";
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--canvas);
  transform: translateY(-150%);
}

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

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 22px clamp(24px, 4vw, 64px);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  transition: background-color .25s ease, border-color .25s ease, backdrop-filter .25s ease;
}

.site-header.is-scrolled {
  position: fixed;
  border-bottom-color: var(--line);
  background: rgba(10, 10, 10, .88);
  backdrop-filter: blur(16px);
}

.brand { width: 154px; }
.brand img, .footer-brand img { width: 100%; height: auto; }

.site-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; }
.site-nav > a:not(.nav-pill) { color: var(--body); }

.nav-pill, .button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 9px 16px;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  transition: border-color .25s ease, background-color .25s ease, color .25s ease;
}

.nav-pill:hover, .button:hover,
.nav-pill:focus-visible, .button:focus-visible {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--canvas);
}

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  grid-template-columns: minmax(0, 1.2fr) minmax(380px, .8fr);
  align-items: center;
  gap: clamp(30px, 5vw, 90px);
  padding: 140px clamp(24px, 6vw, 100px) 80px;
}

.hero::before {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 80px 80px;
  content: "";
  pointer-events: none;
  mask-image: linear-gradient(to bottom, transparent, black 25%, transparent 95%);
}

.hero-copy { position: relative; z-index: 2; max-width: 880px; }

.eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.hero-copy > .eyebrow { display: flex; align-items: center; gap: 12px; margin-bottom: 40px; }
.hero-copy > .eyebrow span { width: 34px; height: 1px; background: var(--blue); }

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

h1 {
  margin-bottom: 36px;
  font-size: clamp(58px, 8.2vw, 118px);
  font-weight: 400;
  line-height: .89;
  letter-spacing: -.055em;
}

h1 span { color: var(--mute); }

.hero-intro {
  max-width: 470px;
  margin-bottom: 34px;
  color: var(--body);
  font-size: clamp(18px, 1.7vw, 24px);
  line-height: 1.45;
  letter-spacing: -.02em;
}

.signal {
  position: relative;
  width: min(38vw, 520px);
  aspect-ratio: 1;
  justify-self: end;
  border: 1px solid var(--line);
  border-radius: 50%;
  transform: translate3d(var(--signal-x, 0), var(--signal-y, 0), 0);
  transition: transform .45s cubic-bezier(.2, .8, .2, 1);
}

.signal-grid {
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  background: repeating-radial-gradient(circle, transparent 0 25px, rgba(255,255,255,.07) 26px 27px), repeating-linear-gradient(90deg, transparent 0 38px, rgba(255,255,255,.06) 39px 40px);
  animation: drift 18s linear infinite;
}

.signal-orbit { position: absolute; border: 1px solid rgba(160,195,236,.28); border-radius: 50%; }
.signal-orbit::after { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 22px rgba(32,158,225,.8); content: ""; }
.signal-orbit-one { inset: 8%; transform: rotate(31deg); }
.signal-orbit-one::after { top: 8%; right: 21%; }
.signal-orbit-two { inset: 24%; transform: rotate(-27deg); border-color: rgba(255,255,255,.14); }
.signal-orbit-two::after { right: -4px; bottom: 44%; width: 6px; height: 6px; background: var(--orange); }

.signal-core {
  position: absolute;
  inset: 36%;
  display: grid;
  place-content: center;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 50%;
  background: #0d1726;
  text-align: center;
}

.signal-core span { font-size: clamp(26px, 4vw, 56px); line-height: 1; letter-spacing: -.05em; }
.signal-core small { margin-top: 8px; color: var(--blue-soft); font-family: var(--mono); font-size: 9px; letter-spacing: .12em; }
.signal-label { position: absolute; margin: 0; color: var(--mute); font-family: var(--mono); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
.signal-label-top { top: 17%; left: -2%; }
.signal-label-bottom { right: -2%; bottom: 18%; }

.hero-index {
  position: absolute;
  right: clamp(24px, 4vw, 64px);
  bottom: 24px;
  left: clamp(24px, 4vw, 64px);
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--mute);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
}

.hero-index div { height: 1px; flex: 1; background: var(--line); }

.section {
  padding: clamp(80px, 10vw, 150px) clamp(24px, 6vw, 100px);
  border-top: 1px solid var(--line);
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
  gap: 40px 7vw;
}

.section-heading .eyebrow, .connection-label .eyebrow { margin-bottom: 42px; color: var(--mute); }

h2 {
  margin-bottom: 0;
  font-size: clamp(44px, 6.5vw, 88px);
  font-weight: 400;
  line-height: .98;
  letter-spacing: -.045em;
}

h2 span { color: var(--blue-soft); }

.section-lead {
  display: flex;
  align-items: flex-end;
  padding-bottom: 8px;
}

.section-lead p, .connection-copy > p {
  max-width: 490px;
  margin-bottom: 0;
  color: var(--body);
  font-size: 18px;
  line-height: 1.55;
}

.principles {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 48px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.principle-card {
  position: relative;
  display: flex;
  min-height: 470px;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  overflow: hidden;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--canvas-card);
}

.card-number { color: var(--mute); font-family: var(--mono); font-size: 11px; letter-spacing: .12em; }
.card-mark { position: relative; width: 150px; height: 150px; align-self: center; }
.card-mark::before, .card-mark::after, .card-mark span { position: absolute; content: ""; }

.mark-human::before { inset: 10%; border: 1px solid rgba(160,195,236,.4); border-radius: 50%; }
.mark-human::after { inset: 31%; border-radius: 50%; background: var(--blue); box-shadow: 0 0 50px rgba(32,158,225,.28); }
.mark-human span { top: 49%; left: 0; width: 100%; height: 1px; background: rgba(255,255,255,.2); transform: rotate(-30deg); }

.mark-purpose::before { inset: 9%; border: 1px solid rgba(255,255,255,.25); transform: rotate(45deg); }
.mark-purpose::after { inset: 31%; border: 1px solid var(--orange); transform: rotate(45deg); }
.mark-purpose span { top: 20%; left: 49%; width: 1px; height: 60%; background: linear-gradient(transparent, var(--orange), transparent); }

.mark-forward::before { inset: 14%; border-top: 1px solid rgba(196,181,253,.6); border-right: 1px solid rgba(196,181,253,.6); transform: rotate(45deg); }
.mark-forward::after { top: 49%; left: 9%; width: 82%; height: 1px; background: linear-gradient(90deg, transparent, var(--purple), var(--blue-soft)); }
.mark-forward span { top: 37%; right: 10%; width: 36px; height: 36px; border-top: 1px solid var(--blue-soft); border-right: 1px solid var(--blue-soft); transform: rotate(45deg); }

.card-copy .eyebrow { margin-bottom: 18px; color: var(--blue-soft); }
.card-copy h3 { max-width: 270px; margin-bottom: 14px; font-size: 26px; font-weight: 400; line-height: 1.15; letter-spacing: -.025em; }
.card-copy > p:last-child { max-width: 330px; margin-bottom: 0; color: var(--mute); font-size: 14px; line-height: 1.55; }

.connection {
  display: grid;
  grid-template-columns: .65fr 1.35fr;
  align-items: end;
  gap: 40px;
  min-height: 570px;
}

.connection-copy h2 { margin-bottom: 32px; }
.connection > .button { grid-column: 2; justify-self: start; margin-top: 8px; }

.site-footer {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: end;
  gap: 40px;
  padding: 48px clamp(24px, 4vw, 64px);
  border-top: 1px solid var(--line);
  color: var(--body);
}

.footer-brand { width: 180px; }
.site-footer > p { margin-bottom: 0; font-size: 18px; line-height: 1.4; }
.footer-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 5px; color: var(--mute); font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.footer-meta a { color: var(--body); margin-bottom: 10px; }

.back-to-top {
  position: fixed;
  z-index: 40;
  right: 24px;
  bottom: 24px;
  display: grid;
  width: 46px;
  height: 46px;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 50%;
  background: rgba(10, 10, 10, .88);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity .25s ease, transform .25s ease, background-color .25s ease, color .25s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--ink);
  color: var(--canvas);
}

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s ease var(--reveal-delay, 0ms), transform .7s cubic-bezier(.2, .7, .2, 1) var(--reveal-delay, 0ms);
}

.js .reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@keyframes drift { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .signal-grid { animation: none; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 170px; }
  .signal { width: min(76vw, 500px); justify-self: center; margin: 40px 0 60px; }
  .about { grid-template-columns: 1fr; }
  .section-lead { max-width: 620px; }
  .principles { grid-template-columns: 1fr; }
  .principle-card { min-height: 390px; }
  .card-mark { position: absolute; top: 70px; right: 8%; opacity: .78; }
  .card-copy { position: relative; z-index: 1; max-width: 60%; }
  .connection { grid-template-columns: 1fr; }
  .connection > .button { grid-column: 1; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .footer-meta { grid-column: 2; grid-row: 1 / 3; }
}

@media (max-width: 620px) {
  .site-header { padding: 18px 20px; }
  .brand { width: 126px; }
  .site-nav { gap: 10px; }
  .site-nav > a:not(.nav-pill) { display: none; }
  .nav-pill, .button { min-height: 44px; }
  .hero { padding: 145px 20px 70px; }
  .hero-copy > .eyebrow { margin-bottom: 28px; }
  h1 { font-size: clamp(52px, 16vw, 76px); line-height: .93; }
  .hero-intro { max-width: 320px; font-size: 18px; }
  .signal { width: 83vw; }
  .signal-label-top { left: 2%; }
  .signal-label-bottom { right: 1%; }
  .hero-index { right: 20px; left: 20px; }
  .section { padding-right: 20px; padding-left: 20px; }
  .principles { margin-top: 20px; }
  .principle-card { min-height: 420px; }
  .card-mark { top: 65px; right: 20px; width: 130px; height: 130px; }
  .card-copy { max-width: 90%; }
  .connection { min-height: 520px; align-content: center; }
  .site-footer { grid-template-columns: 1fr; padding: 44px 20px; }
  .footer-meta { grid-column: 1; grid-row: auto; align-items: flex-start; margin-top: 22px; }
  .back-to-top { right: 16px; bottom: 16px; }
}