:root {
  color-scheme: light;
  --paper: #f2f1eb;
  --ink: #191d16;
  --muted: #555b4d;
  --line: #d1d3c6;
  --art: #192017;
  --accent: #d6f86a;
  font-family: "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
}

a { color: inherit; }
a:focus-visible { outline: 2px solid #416418; outline-offset: 5px; }

.frame {
  width: min(100% - 7rem, 81rem);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  z-index: 2;
  top: 1rem;
  left: 1rem;
  padding: .75rem 1rem;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-180%);
}
.skip-link:focus { transform: none; }

.masthead, .footer {
  min-height: 4.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.masthead { border-bottom: 1px solid var(--line); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: -.045em;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 1.6rem;
  height: 1.6rem;
  display: grid;
  place-items: center;
  color: var(--ink);
}
.brand-mark i {
  grid-area: 1 / 1;
  width: 1.55rem;
  height: .64rem;
  border: 1px solid currentColor;
  border-radius: 50%;
}
.brand-mark i:nth-child(2) { rotate: 60deg; }
.brand-mark i:nth-child(3) { rotate: -60deg; }

nav { display: flex; gap: clamp(1rem, 3vw, 2.5rem); }
nav a, .footer a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  gap: .4rem;
  text-decoration: none;
  white-space: nowrap;
}
nav a:hover, .footer a:hover { text-decoration: underline; text-underline-offset: .3em; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  padding-block: clamp(2rem, 5vw, 4.4rem);
}
.hero-copy { padding-block: .6rem; }
.eyebrow {
  margin: 0 0 1.35rem;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--muted);
}
h1 {
  font-size: clamp(4rem, 9.2vw, 9rem);
  line-height: .83;
  margin: 0;
  letter-spacing: -.065em;
  font-weight: 800;
}
h1 span { color: #557326; }
.intro {
  color: var(--muted);
  max-width: 26em;
  margin: 1.9rem 0 1.6rem;
  line-height: 1.75;
}
.hero-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.6rem;
  min-height: 3rem;
  padding: .5rem .85rem .5rem 1rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: .92rem;
}
.hero-link:hover { background: #364923; }
.hero-link span { font-size: 1.2rem; }

.orbit-art {
  position: relative;
  isolation: isolate;
  aspect-ratio: 1.12;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 50%, #344127, var(--art) 72%);
  color: var(--accent);
}
.art-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, #d6f86a13 1px, transparent 1px),
    linear-gradient(to bottom, #d6f86a13 1px, transparent 1px);
  background-size: 8% 8%;
  background-position: center;
}
.art-cross { position: absolute; opacity: .27; background: currentColor; }
.horizontal { top: 50%; left: 6%; right: 6%; height: 1px; }
.vertical { left: 50%; top: 7%; bottom: 7%; width: 1px; }
.orbit-field {
  position: absolute;
  inset: 10% 14%;
  display: grid;
  place-items: center;
  transform: rotate(-11deg);
}
.ring {
  position: relative;
  grid-area: 1 / 1;
  width: 100%;
  aspect-ratio: 2.65;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  box-shadow: 0 0 1rem #d6f86a22;
}
.ring::after {
  content: "";
  position: absolute;
  top: 49%;
  right: -.38rem;
  width: .7rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 .75rem #d6f86a70;
}
.ring-b { rotate: 60deg; opacity: .83; }
.ring-c { rotate: -60deg; opacity: .7; }
.ring-c::after { left: -.38rem; right: auto; }
.core {
  grid-area: 1 / 1;
  width: 10%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 2.4rem #d6f86a70;
}
.art-corner {
  position: absolute;
  width: 1rem;
  height: 1rem;
  opacity: .75;
}
.corner-start { top: 6%; left: 6%; border-top: 1px solid; border-left: 1px solid; }
.corner-end { bottom: 6%; right: 6%; border-bottom: 1px solid; border-right: 1px solid; }

.details {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  padding-block: 2.3rem 3rem;
  border-top: 1px solid var(--line);
}
.details section { scroll-margin-top: 1rem; }
.details h2 { margin: 0 0 .65rem; font-size: 1.45rem; letter-spacing: -.04em; }
.details p { margin: 0; color: var(--muted); line-height: 1.8; }
.footer { min-height: 4rem; border-top: 1px solid var(--line); font-size: .88rem; }
.footer > span { font-weight: 700; }

@media (max-width: 60rem) {
  .frame { width: calc(100% - 3rem); }
}

@media (max-width: 47rem) {
  .hero { grid-template-columns: 1fr; gap: 1.8rem; }
  h1 { font-size: clamp(4.3rem, 16vw, 7rem); }
  .intro { margin-block: 1.35rem; }
  .orbit-art { aspect-ratio: 1.45; }
  .orbit-field { inset-inline: 20%; }
}

@media (max-width: 30rem) {
  .frame { width: calc(100% - 2rem); }
  .masthead { min-height: 4rem; gap: .6rem; }
  .brand { gap: .35rem; }
  nav { gap: .75rem; font-size: .83rem; }
  .details { grid-template-columns: 1fr; gap: 1.6rem; padding-block: 1.6rem 2rem; }
}