:root {
  color-scheme: dark;
  --bg: #0c1117;
  --panel: #121a22;
  --panel-2: #16232d;
  --text: #f4f7fb;
  --muted: #aab7c4;
  --line: rgba(255, 255, 255, 0.12);
  --green: #80d39b;
  --cedar: #c6a15b;
  --blue: #7db7ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 76% 18%, rgba(125, 183, 255, 0.18), transparent 30rem),
    radial-gradient(circle at 22% 72%, rgba(128, 211, 155, 0.14), transparent 26rem),
    var(--bg);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  background: rgba(12, 17, 23, 0.82);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background:
    linear-gradient(135deg, rgba(128, 211, 155, 0.95), rgba(198, 161, 91, 0.95)),
    #16232d;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.18) inset;
}

nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

nav a:hover,
.policy-links a:hover {
  color: var(--text);
}

.hero {
  min-height: 760px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  align-items: center;
  gap: clamp(36px, 7vw, 90px);
  padding: 72px clamp(20px, 5vw, 64px) 64px;
  overflow: hidden;
}

.hero-copy {
  max-width: 660px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(64px, 10vw, 128px);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 19px;
}

.lead {
  max-width: 600px;
  color: var(--muted);
  font-size: 21px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 7px;
  font-weight: 700;
}

.primary {
  background: var(--text);
  color: #111821;
}

.secondary {
  border: 1px solid var(--line);
  color: var(--muted);
}

.system-visual {
  position: relative;
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent),
    linear-gradient(180deg, rgba(22, 35, 45, 0.9), rgba(12, 17, 23, 0.88));
  overflow: hidden;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
}

.grid-plane {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
}

.node {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 0 9px rgba(128, 211, 155, 0.12), 0 0 28px rgba(128, 211, 155, 0.8);
}

.node-a { left: 18%; top: 24%; }
.node-b { left: 66%; top: 30%; background: var(--blue); box-shadow: 0 0 0 9px rgba(125, 183, 255, 0.12), 0 0 28px rgba(125, 183, 255, 0.8); }
.node-c { left: 42%; top: 58%; background: var(--cedar); box-shadow: 0 0 0 9px rgba(198, 161, 91, 0.12), 0 0 28px rgba(198, 161, 91, 0.8); }
.node-d { left: 78%; top: 72%; }

.route {
  position: absolute;
  height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.78), transparent);
}

.route-a { left: 20%; top: 27%; width: 330px; transform: rotate(5deg); }
.route-b { left: 43%; top: 60%; width: 260px; transform: rotate(22deg); }
.route-c { left: 19%; top: 27%; width: 250px; transform: rotate(42deg); }

.metric-card {
  position: absolute;
  min-width: 150px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(12, 17, 23, 0.74);
  backdrop-filter: blur(16px);
}

.metric-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metric-card strong {
  display: block;
  margin-top: 6px;
  font-size: 24px;
}

.card-a { left: 10%; bottom: 12%; }
.card-b { right: 9%; top: 12%; }

.section {
  padding: 84px clamp(20px, 5vw, 64px);
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article {
  min-height: 210px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(18, 26, 34, 0.72);
}

.feature-grid p,
.use-list {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 42px;
}

.use-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 18px;
}

.use-list li {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(18, 26, 34, 0.58);
}

.policy-band {
  background: rgba(22, 35, 45, 0.52);
}

.policy-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.policy-links a {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--muted);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(20px, 5vw, 64px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 860px) {
  .site-header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero,
  .split,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  .system-visual {
    min-height: 360px;
  }
}