:root {
  --bg: #0f1220;
  --panel: #1a1f35;
  --accent: #7c8cff;
  --text: #e6e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 20%, #232a4d, var(--bg));
  color: var(--text);
  font-family: system-ui, sans-serif;
}

main {
  width: min(560px, 90vw);
  text-align: center;
}

h1 {
  font-size: 3rem;
  margin-bottom: 0.25rem;
  letter-spacing: 0.02em;
}

h1 span {
  color: var(--accent);
  font-size: 1.4rem;
}

.tagline {
  opacity: 0.75;
  margin-bottom: 2rem;
}

.card {
  background: var(--panel);
  border: 1px solid #2b3355;
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  text-align: left;
}

.card h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

button {
  background: var(--accent);
  color: #0f1220;
  border: 0;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.1);
}

pre {
  background: #0b0e1c;
  border-radius: 8px;
  padding: 0.75rem;
  font-size: 0.85rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

footer {
  margin-top: 2rem;
  opacity: 0.5;
  font-size: 0.85rem;
}