:root {
  color-scheme: dark;
  --ink: #07110f;
  --surface: #0a1714;
  --line: rgba(208, 255, 231, 0.16);
  --text: #f0f7f3;
  --muted: #a4b5ad;
  --acid: #bafc67;
  --mint: #49e6b5;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--ink);
  color: var(--text);
  font-family: Inter, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a, button { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  transform: translateY(-150%);
  padding: .65rem 1rem;
  background: var(--acid);
  color: var(--ink);
  border-radius: 999px;
}

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

.site-header {
  position: absolute;
  z-index: 10;
  inset: 0 0 auto;
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  padding: 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  aspect-ratio: 1;
  border: 1px solid var(--mint);
  color: var(--acid);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: -.06em;
  transform: rotate(45deg);
}

.brand-mark::first-line { transform: rotate(-45deg); }
.brand-mark { line-height: 1; }
.brand-mark { text-indent: 0; }

.brand-name {
  font-size: .82rem;
  font-weight: 750;
  letter-spacing: .18em;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 17, 15, .5);
  color: var(--text);
  font: inherit;
  font-size: .78rem;
  letter-spacing: .12em;
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition: border-color .2s ease, background .2s ease;
}

.language-switch:hover, .language-switch:focus-visible {
  border-color: var(--mint);
  background: rgba(73, 230, 181, .08);
  outline: none;
}

.switch-arrow { color: var(--acid); }

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 760px;
  height: min(900px, 100svh);
  padding: 150px max(24px, calc((100vw - var(--max)) / 2)) 80px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr);
  align-items: center;
  gap: 52px;
  background:
    radial-gradient(circle at 78% 38%, rgba(73, 230, 181, .08), transparent 27%),
    linear-gradient(145deg, #07110f 10%, #091a16 100%);
}

.grid {
  position: absolute;
  z-index: -3;
  inset: 0;
  opacity: .34;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.55), transparent 88%);
}

.ambient {
  position: absolute;
  z-index: -2;
  border-radius: 50%;
  filter: blur(110px);
  opacity: .16;
}

.ambient-one { width: 380px; height: 380px; right: -80px; top: 9%; background: var(--mint); }
.ambient-two { width: 260px; height: 260px; left: 28%; bottom: -100px; background: var(--acid); opacity: .08; }

.hero-content { max-width: 680px; }

.eyebrow, .section-label {
  margin: 0 0 24px;
  color: var(--mint);
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .24em;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(3.5rem, 7.2vw, 7.4rem);
  font-weight: 690;
  letter-spacing: -.065em;
  line-height: .98;
}

h1 span { display: block; }

h1 .accent {
  color: transparent;
  -webkit-text-stroke: 1px rgba(186, 252, 103, .86);
  text-shadow: 0 0 40px rgba(186, 252, 103, .08);
}

.lead {
  max-width: 590px;
  margin: 32px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.16rem);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 38px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #dce9e3;
  font-size: .82rem;
  letter-spacing: .06em;
}

.status-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 0 5px rgba(186, 252, 103, .08);
  animation: pulse 2.4s ease-out infinite;
}

.signal {
  position: relative;
  justify-self: end;
  width: min(40vw, 470px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.signal-line {
  position: absolute;
  inset: 8%;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.signal-line::before, .signal-line::after {
  content: "";
  position: absolute;
  background: var(--line);
}

.signal-line::before { width: 1px; height: 116%; left: 50%; top: -8%; }
.signal-line::after { height: 1px; width: 116%; top: 50%; left: -8%; }

.signal-orbit {
  position: absolute;
  border: 1px solid rgba(73, 230, 181, .28);
  border-radius: 50%;
}

.signal-orbit-a { inset: 21%; }
.signal-orbit-b { inset: 34%; border-style: dashed; animation: rotate 18s linear infinite; }

.signal-core {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 24%;
  aspect-ratio: 1;
  background: var(--acid);
  color: var(--ink);
  font-size: clamp(1rem, 2.4vw, 1.7rem);
  font-weight: 900;
  letter-spacing: -.08em;
  transform: rotate(45deg);
  box-shadow: 0 0 65px rgba(186, 252, 103, .15);
}

.signal-label, .signal-index {
  position: absolute;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: .65rem;
  letter-spacing: .16em;
}

.label-a { top: 2%; left: 14%; }
.label-b { right: 0; bottom: 19%; transform: rotate(90deg); }
.signal-index { bottom: 1%; left: 8%; color: var(--mint); }

.information {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  padding: 120px 0;
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) minmax(330px, .78fr);
  gap: 48px;
  align-items: start;
}

.section-number {
  color: var(--acid);
  font-family: ui-monospace, monospace;
  font-size: .75rem;
  border-top: 1px solid var(--acid);
  padding-top: 12px;
}

.information-copy h2 {
  margin: 0 0 20px;
  font-size: clamp(2rem, 3.8vw, 4rem);
  letter-spacing: -.05em;
  line-height: 1.15;
}

.information-copy > p:last-child { margin: 0; max-width: 580px; color: var(--muted); }

.company-card {
  margin: 0;
  border-top: 1px solid var(--line);
}

.company-card > div {
  padding: 20px 0;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 18px;
  border-bottom: 1px solid var(--line);
}

.company-card dt { color: var(--muted); font-size: .78rem; }
.company-card dd { margin: 0; font-size: .94rem; }

.site-footer {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  padding: 30px 0 38px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .74rem;
  letter-spacing: .05em;
}

.site-footer p { margin: 0; }
.footer-note { text-transform: uppercase; }

@keyframes pulse { 70%, 100% { box-shadow: 0 0 0 12px rgba(186, 252, 103, 0); } }
@keyframes rotate { to { transform: rotate(360deg); } }

@media (max-width: 820px) {
  .site-header { width: min(calc(100% - 36px), var(--max)); padding-top: 20px; }
  .brand-name { font-size: .72rem; }
  .hero {
    min-height: 800px;
    height: auto;
    padding: 150px 18px 72px;
    grid-template-columns: 1fr;
    gap: 34px;
  }
  h1 { font-size: clamp(3.3rem, 15vw, 5.5rem); }
  .signal { justify-self: center; width: min(90vw, 360px); }
  .information { width: calc(100% - 36px); padding: 84px 0; grid-template-columns: 1fr; gap: 30px; }
  .section-number { width: 54px; }
  .site-footer { width: calc(100% - 36px); }
}

@media (max-width: 480px) {
  .brand-name { display: none; }
  .hero { min-height: 740px; }
  .signal { width: min(82vw, 310px); }
  .company-card > div { grid-template-columns: 92px 1fr; }
  .site-footer { gap: 16px; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}