body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: #0b0f14;
  color: #e6eef7;
}

.nuclear-shell {
  max-width: 960px;
  margin: 40px auto;
  padding: 24px;
  background: #121923;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.nuclear-tool-host {
  margin-top: 18px;
}

.nuclear-nav {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.nuclear-nav a {
  color: #86b6ff;
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  background: #0f1621;
}