:root {
  color-scheme: dark;
  --field: #090b0a;
  --panel: #111710;
  --ink: #edf1e9;
  --muted: #9aa398;
  --acid: #d9ff3f;
  --line: #2b342b;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  padding: 24px;
  display: grid;
  place-items: center;
  background: var(--field);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

main {
  width: min(680px, 100%);
  padding: clamp(26px, 6vw, 56px);
  border: 1px solid var(--line);
  background: var(--panel);
}

.signal {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--acid);
  font: 700 11px ui-monospace, monospace;
  letter-spacing: .14em;
}

.signal i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 18px rgba(217, 255, 63, .55);
}

h1 {
  max-width: 540px;
  margin: 34px 0 18px;
  font-size: clamp(38px, 8vw, 70px);
  line-height: .94;
  letter-spacing: -.06em;
}

p {
  max-width: 540px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

footer {
  margin-top: 48px;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 11px ui-monospace, monospace;
  letter-spacing: .07em;
}

a { color: var(--acid); text-decoration: none; }

@media (max-width: 480px) {
  main { padding: 24px; }
  footer { align-items: flex-start; flex-direction: column; }
}