:root {
  color-scheme: dark;
  --ink: #18140f;
  --workshop: #101712;
  --workshop-soft: #18221a;
  --cream: #f1e8d6;
  --muted: #b8ab92;
  --amber: #f4c77b;
  --blue: #82e1ff;
  --line: rgba(249, 222, 171, 0.18);
  --mono: "SFMono-Regular", "Menlo", "Roboto Mono", monospace;
  --sans: "Avenir Next", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--workshop); scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(244, 199, 123, 0.12), transparent 24rem),
    linear-gradient(180deg, #080b09, var(--workshop));
  color: var(--cream);
  font-family: var(--sans);
}

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

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 8px 12px;
  transform: translateY(-160%);
  background: var(--cream);
  color: var(--ink);
}

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

.network-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: grid;
  grid-template-columns: minmax(230px, 1fr) auto minmax(230px, 1fr);
  align-items: center;
  min-height: 68px;
  padding: 0 clamp(18px, 3vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgba(12, 17, 13, 0.92);
  backdrop-filter: blur(16px);
}

.network-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: max-content;
}

.brand-icon {
  width: 28px;
  aspect-ratio: 1.1;
  border: 2px solid #9d9077;
  background: linear-gradient(135deg, #6cbb75, #4b87a0);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.04);
}

.network-brand strong,
.network-brand small { display: block; }

.network-brand strong { color: var(--amber); font-size: 0.95rem; }

.network-brand small {
  margin-top: 2px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.network-title {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.signal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #78c86a;
  box-shadow: 0 0 12px rgba(120, 200, 106, 0.8);
}

.network-header nav {
  display: flex;
  justify-content: flex-end;
  gap: clamp(14px, 2vw, 30px);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.network-header nav a { color: var(--blue); }
.network-header nav a:hover { color: var(--cream); }

main {
  width: min(1480px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(28px, 4vw, 58px) 0 48px;
}

.network-intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

h1 {
  max-width: 760px;
  margin: 0;
  color: var(--cream);
  font-size: clamp(2rem, 4vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

dl {
  display: flex;
  gap: clamp(20px, 3vw, 44px);
  margin: 0;
}

dl div { min-width: 82px; }

dt {
  color: var(--amber);
  font-family: var(--mono);
  font-size: clamp(1.1rem, 2vw, 1.8rem);
  font-variant-numeric: tabular-nums;
}

dd { margin: 2px 0 0; color: var(--muted); font-size: 0.78rem; }

.network-guide {
  margin: 28px 0 12px;
  color: var(--muted);
  font-size: 0.82rem;
}

.network-frame-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
}

iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 0;
  background: #fff;
}

@media (max-width: 900px) {
  .network-header {
    grid-template-columns: 1fr auto;
    gap: 12px;
  }

  .network-title { display: none; }
  .network-header nav a[download] { display: none; }
  .network-intro { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  .network-header { min-height: 60px; padding: 0 14px; }
  .network-brand small { display: none; }
  .network-header nav { font-size: 0.66rem; }
  main { width: min(100% - 20px, 1480px); padding-top: 28px; }
  dl { width: 100%; justify-content: space-between; gap: 10px; }
  dl div { min-width: 0; }
  iframe { min-height: 640px; aspect-ratio: auto; }
}