*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  font-family: "SF Mono", "Cascadia Mono", "Consolas", "Liberation Mono",
    monospace;
  background: #0b0f0c;
  color: #e8f0e9;
}

main {
  text-align: center;
  padding: 1.5rem;
}

.callsign {
  letter-spacing: 0.35em;
  font-size: 0.85rem;
  color: #7dff9a;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: clamp(1.4rem, 4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.3;
}