body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #1f2937;
  background: #f8fafc;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.nav {
  background: #0f172a;
  color: #e2e8f0;
  padding: 0.75rem 1rem;
}

.nav .container {
  padding: 0;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav a {
  color: #e2e8f0;
  text-decoration: none;
  font-weight: 600;
}

.nav a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  color: #0f172a;
  line-height: 1.2;
}

h1 {
  margin-top: 0.5rem;
}

p, li {
  line-height: 1.6;
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

pre {
  background: #0b1020;
  color: #d1d5db;
  padding: 0.9rem;
  border-radius: 8px;
  overflow-x: auto;
}

.card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}

.muted {
  color: #475569;
}

a {
  color: #0b62d6;
}

.footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #e2e8f0;
  color: #475569;
  font-size: 0.92rem;
}