:root {
  color-scheme: dark;
  --ink: #f5f8ff;
  --muted: #aebbd0;
  --surface: #071326;
  --surface-soft: #0c1c34;
  --surface-lift: #112746;
  --line: #29415f;
  --blue: #5eb5ff;
  --teal: #47d7ca;
  --gold: #ffc95a;
  --max: 1180px;
  font-family: "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 8%, rgba(46, 123, 255, .18), transparent 30rem),
    radial-gradient(circle at 15% 40%, rgba(34, 201, 185, .08), transparent 26rem),
    var(--surface);
  font-size: 1.0625rem;
  line-height: 1.65;
}

a { color: var(--blue); text-underline-offset: .2em; }
a:hover { color: #92cdff; }
a:focus-visible, .button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
  border-radius: .2rem;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: .75rem;
  left: .75rem;
  transform: translateY(-200%);
  padding: .7rem 1rem;
  color: #071326;
  background: var(--gold);
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  min-height: 6rem;
  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: .75rem;
  color: var(--ink);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -.02em;
}
.brand img { border-radius: .7rem; }

nav { display: flex; gap: clamp(1rem, 4vw, 2rem); }
nav a { color: var(--muted); font-weight: 600; text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }

main, .site-footer {
  width: min(calc(100% - 2rem), var(--max));
  margin-inline: auto;
}

.hero {
  min-height: 44rem;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(20rem, .95fr);
  align-items: center;
  gap: clamp(2rem, 7vw, 7rem);
  padding: 6rem 0;
}

.eyebrow, .kicker {
  margin: 0 0 1rem;
  color: var(--teal);
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.eyebrow { display: flex; align-items: center; gap: .65rem; }
.status-dot {
  width: .6rem;
  height: .6rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 1rem rgba(255, 201, 90, .8);
}

h1, h2, h3 { line-height: 1.08; letter-spacing: -.045em; text-wrap: balance; }
h1 { margin: 0; max-width: 11ch; font-size: clamp(3.5rem, 8vw, 7.4rem); }
h2 { margin: 0; font-size: clamp(2.25rem, 4vw, 4rem); }
h3 { margin: .8rem 0; font-size: 1.5rem; }

.lede {
  max-width: 42rem;
  margin: 1.75rem 0 0;
  color: #cfdaea;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  line-height: 1.5;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.25rem; }
.button {
  display: inline-flex;
  min-height: 3.2rem;
  align-items: center;
  justify-content: center;
  padding: .75rem 1.2rem;
  border: 1px solid transparent;
  border-radius: .75rem;
  font-weight: 750;
  text-decoration: none;
}
.button.primary { color: #041222; background: var(--blue); }
.button.primary:hover { color: #041222; background: #86c8ff; }
.button.secondary { color: var(--ink); border-color: var(--line); background: rgba(12, 28, 52, .68); }
.button.secondary:hover { color: var(--ink); border-color: var(--blue); }

.hero-art { position: relative; display: grid; place-items: center; min-height: 28rem; }
.hero-art img { position: relative; z-index: 2; width: min(100%, 31rem); height: auto; filter: drop-shadow(0 2.5rem 3rem rgba(0, 0, 0, .35)); }
.orbit { position: absolute; border: 1px solid rgba(94, 181, 255, .25); border-radius: 50%; }
.orbit-one { width: 96%; aspect-ratio: 1; }
.orbit-two { width: 68%; aspect-ratio: 1; box-shadow: 0 0 7rem rgba(71, 215, 202, .16); }

.section { padding: 7rem 0; border-top: 1px solid var(--line); }
.section > h2 { max-width: 18ch; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 3rem; }
.feature-card {
  min-height: 20rem;
  padding: clamp(1.5rem, 3vw, 2.3rem);
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: linear-gradient(145deg, rgba(17, 39, 70, .9), rgba(8, 24, 46, .72));
}
.feature-card p { color: var(--muted); }
.feature-number { color: var(--gold); font: 700 .8rem ui-monospace, monospace; letter-spacing: .12em; }

.boundary { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 7vw, 7rem); align-items: end; }
.boundary > p { margin: 0; color: var(--muted); font-size: 1.2rem; }

.preview-note {
  margin: 2rem 0 8rem;
  padding: clamp(2rem, 6vw, 5rem);
  border: 1px solid #745c2a;
  border-radius: 1.4rem;
  background: radial-gradient(circle at top right, rgba(255, 201, 90, .11), transparent 28rem), var(--surface-soft);
}
.preview-note h2 { max-width: 21ch; }
.preview-note > p:last-child { max-width: 46rem; color: var(--muted); }

.document-shell { display: grid; grid-template-columns: 15rem minmax(0, 48rem); gap: clamp(3rem, 8vw, 8rem); padding: 6rem 0 9rem; }
.document-meta { position: sticky; top: 2rem; align-self: start; padding: 1.5rem 0; border-top: 2px solid var(--teal); color: var(--muted); font-size: .95rem; }
.document-meta strong { color: var(--ink); }
.document h1 { max-width: 13ch; font-size: clamp(3rem, 7vw, 5.6rem); }
.document h2 { margin: 3.5rem 0 1rem; padding-top: 1rem; border-top: 1px solid var(--line); font-size: clamp(1.65rem, 3vw, 2.35rem); }
.document p, .document li { color: #c7d2e3; }
.document code { padding: .12em .32em; border: 1px solid var(--line); border-radius: .3rem; color: #d9eeff; background: var(--surface-soft); font-size: .88em; overflow-wrap: anywhere; }
.document li + li { margin-top: .75rem; }
.callout { margin: 3rem 0; padding: 1.5rem 1.7rem; border-left: 4px solid var(--gold); background: var(--surface-soft); }
.callout h2 { margin: 0 0 .75rem; padding: 0; border: 0; font-size: 1.5rem; }

.site-footer {
  min-height: 10rem;
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 2rem;
  color: var(--muted);
  font-size: .9rem;
}
.site-footer div { display: flex; gap: 1.2rem; }

@media (max-width: 800px) {
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 4rem; }
  .hero-art { min-height: 20rem; order: -1; }
  .hero-art img { width: min(75vw, 23rem); }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; }
  .boundary, .document-shell { grid-template-columns: 1fr; }
  .document-meta { position: static; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 1.5rem; }
  .document-meta .eyebrow { grid-column: 1 / -1; }
  .site-footer { grid-template-columns: 1fr; gap: .5rem; }
}

@media (max-width: 520px) {
  body { font-size: 1rem; }
  .site-header { min-height: 5rem; }
  .brand span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  h1 { font-size: clamp(3rem, 16vw, 4.4rem); }
  .hero { gap: 2rem; }
  .hero-art { min-height: 16rem; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .document-shell { padding-top: 3rem; }
  .document-meta { grid-template-columns: 1fr; }
}

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

@media (forced-colors: active) {
  .status-dot { forced-color-adjust: none; }
  .button { border-color: ButtonText; }
  .feature-card, .preview-note, .callout { background: Canvas; }
}