:root {
  --ink: #101c2b;
  --paper: #f5f8ff;
  --signal: #0f7b6c;
  --signal-2: #0a5f53;
  --card: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 20%, #d9ffe9 0%, transparent 35%),
    radial-gradient(circle at 90% 15%, #d7ecff 0%, transparent 30%),
    linear-gradient(180deg, #f7fbff 0%, #eef5ff 100%);
  min-height: 100vh;
}

.shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.2rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.03em;
}

.eyebrow {
  margin: 0;
  font-weight: 700;
  color: var(--signal);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
}

.subtle {
  margin-top: 0.75rem;
  opacity: 0.85;
}

.panel {
  background: color-mix(in oklab, var(--card) 90%, #e9f5ff 10%);
  border: 1px solid #d7e4f2;
  border-radius: 16px;
  margin-top: 1.2rem;
  padding: 1rem;
  box-shadow: 0 8px 24px rgba(6, 34, 70, 0.08);
}

.actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: var(--signal);
  color: #ffffff;
  text-decoration: none;
  padding: 0.65rem 1rem;
  font-weight: 700;
  cursor: pointer;
}

.btn:hover {
  background: var(--signal-2);
}

.btn.ghost {
  background: #e8f4f2;
  color: var(--signal-2);
}

pre {
  margin: 0;
  overflow: auto;
  padding: 0.9rem;
  border-radius: 10px;
  background: #0d1d2d;
  color: #d7e6f5;
  min-height: 7rem;
}

@media (max-width: 640px) {
  .shell {
    padding: 1.4rem 0.8rem 2rem;
  }
}