:root {
  color-scheme: dark;
  --bg: #03070c;
  --surface: #07101a;
  --surface-2: #0a1623;
  --text: #f6f9fc;
  --muted: #a5b3c3;
  --line: #1b2c3e;
  --line-bright: #164e7e;
  --accent: #22b8f4;
  --accent-2: #287dff;
  --max: 1180px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(rgba(19, 53, 79, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(19, 53, 79, 0.08) 1px, transparent 1px),
    radial-gradient(circle at 70% 12%, rgba(0, 122, 255, 0.11), transparent 28%),
    var(--bg);
  background-size: 52px 52px, 52px 52px, auto, auto;
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover {
  color: #82dbff;
}

.shell {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(81, 130, 169, 0.28);
  background: rgba(3, 7, 12, 0.9);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.brand span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
}

.nav-links a {
  color: #d4deea;
  font-size: 0.86rem;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(320px, 0.65fr);
  gap: 56px;
  align-items: center;
  min-height: 560px;
  padding: 90px 0 72px;
}

.hero h1 {
  max-width: 790px;
  margin: 0;
  font-size: clamp(3rem, 5vw, 4.9rem);
  line-height: 0.96;
  letter-spacing: -0.065em;
}

.hero h1 span {
  display: block;
  color: var(--accent);
}

.hero p {
  max-width: 730px;
  margin: 30px 0 0;
  color: #c4cfdb;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
}

.signal-map {
  position: relative;
  min-height: 360px;
  border: 1px solid var(--line-bright);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(8, 20, 33, 0.92), rgba(4, 10, 17, 0.94));
  box-shadow: 0 0 70px rgba(0, 133, 255, 0.1);
  overflow: hidden;
}

.signal-map::before,
.signal-map::after {
  content: "";
  position: absolute;
  left: -30%;
  right: 22%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-2));
  box-shadow: 0 92px 0 rgba(34, 184, 244, 0.72), 0 184px 0 rgba(34, 184, 244, 0.45);
  transform: rotate(8deg);
}

.signal-map::before {
  top: 88px;
}

.signal-map::after {
  top: 140px;
  transform: rotate(-8deg);
}

.signal-list {
  position: absolute;
  inset: 28px 26px 28px auto;
  display: grid;
  width: 62%;
  align-content: center;
  gap: 12px;
}

.signal-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 38px;
  padding: 5px 8px;
  color: #eaf5ff;
  font-size: 0.9rem;
}

.signal-item::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border: 1px solid var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent);
}

.band {
  border-top: 1px solid var(--line);
}

.band-inner {
  padding: 74px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-heading h2,
.legal-header h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.section-heading p,
.legal-header p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.capability-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.capability {
  min-height: 180px;
  padding: 26px 24px;
  border-right: 1px solid var(--line);
}

.capability:nth-child(4n) {
  border-right: 0;
}

.capability:nth-child(n + 5) {
  border-top: 1px solid var(--line);
}

.capability h3 {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.98rem;
}

.capability p {
  margin: 0;
  color: #b1bfcd;
  font-size: 0.9rem;
}

.use-grid,
.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}

.use-panel,
.control-panel {
  padding: 38px;
  background: rgba(6, 14, 23, 0.96);
}

.use-panel h3,
.control-panel h3 {
  margin: 0 0 18px;
  font-size: 1.22rem;
}

.clean-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: #bdc9d5;
}

.clean-list li {
  position: relative;
  padding-left: 20px;
}

.clean-list li::before {
  content: "";
  position: absolute;
  top: 0.66em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 9px rgba(34, 184, 244, 0.7);
}

.callout {
  margin-top: 24px;
  padding: 22px 24px;
  border-left: 2px solid var(--accent);
  background: rgba(14, 42, 63, 0.45);
  color: #dceaf5;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 42px 0;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 36px;
}

.footer-copy p {
  max-width: 440px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links a {
  font-size: 0.9rem;
}

.legal-main {
  min-height: 70vh;
}

.legal-header {
  padding: 88px 0 50px;
  border-bottom: 1px solid var(--line);
}

.legal-meta {
  color: var(--accent);
  font-size: 0.88rem;
}

.legal-document {
  display: grid;
  grid-template-columns: 220px minmax(0, 760px);
  gap: 70px;
  padding: 64px 0 96px;
}

.legal-toc {
  position: sticky;
  top: 104px;
  align-self: start;
  display: grid;
  gap: 10px;
}

.legal-toc a {
  color: var(--muted);
  font-size: 0.85rem;
  text-decoration: none;
}

.legal-toc a:hover {
  color: var(--accent);
}

.legal-content section {
  scroll-margin-top: 110px;
  margin-bottom: 48px;
}

.legal-content h2 {
  margin: 0 0 16px;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.legal-content h3 {
  margin: 26px 0 10px;
  font-size: 1.05rem;
}

.legal-content p,
.legal-content li {
  color: #bdc9d5;
}

.legal-content ul {
  padding-left: 22px;
}

@media (max-width: 900px) {
  .nav-links a:not(.legal-nav) {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 72px;
  }

  .signal-map {
    min-height: 300px;
  }

  .capability-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .capability:nth-child(4n) {
    border-right: 1px solid var(--line);
  }

  .capability:nth-child(2n) {
    border-right: 0;
  }

  .capability:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .legal-document {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .legal-toc {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

  .nav {
    min-height: 64px;
  }

  .nav-links {
    gap: 14px;
  }

  .nav-links .legal-nav {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 60px 0 56px;
  }

  .hero h1 {
    overflow-wrap: anywhere;
    font-size: clamp(2.4rem, 11.5vw, 3.2rem);
    letter-spacing: -0.055em;
  }

  .hero p {
    font-size: 1rem;
  }

  .signal-list {
    width: 70%;
  }

  .band-inner {
    padding: 56px 0;
  }

  .capability-rail,
  .use-grid,
  .control-grid {
    grid-template-columns: 1fr;
  }

  .capability,
  .capability:nth-child(2n),
  .capability:nth-child(4n) {
    min-height: auto;
    border-right: 0;
    border-top: 1px solid var(--line);
  }

  .capability:first-child {
    border-top: 0;
  }

  .use-panel,
  .control-panel {
    padding: 28px 24px;
  }

  .footer-inner {
    flex-direction: column;
  }

  .legal-header {
    padding-top: 64px;
  }

  .legal-document {
    padding-top: 42px;
  }

  .legal-toc {
    grid-template-columns: 1fr;
  }
}