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

body {
  background: #111;
  color: #eee;
  font-family: "Courier New", monospace;
  padding: 2rem;
}

h1 {
  text-align: center;
  color: #0f0;
  margin-bottom: 2rem;
  letter-spacing: 0.2rem;
}

#display-link {
  display: block;
  text-align: center;
  color: #000;
  background: #0f0;
  border: 2px solid #0f0;
  padding: 0.75rem;
  margin-bottom: 1.5rem;
  font-family: inherit;
  font-size: 1rem;
  text-decoration: none;
  letter-spacing: 0.1rem;
}

h2 {
  color: #0f0;
  margin: 1.5rem 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
}

button {
  background: #000;
  color: #0f0;
  border: 2px solid #0f0;
  padding: 1rem;
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
}

button:active {
  background: #0f0;
  color: #000;
}