*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  margin: 0;
  color: #111;
  background: #fff;
  line-height: 1.6;
}

/* Nav */
nav {
  border-bottom: 1px solid #e5e7eb;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 100;
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
}

.site-title {
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  color: #111;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.5rem;
}

nav ul a {
  text-decoration: none;
  color: #555;
  font-size: 0.9rem;
}

nav ul a:hover { color: #111; }
nav ul a.active { color: #111; font-weight: 600; }

/* Content */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 1.5rem;
}

code {
  background: #f3f4f6;
  padding: 0.15em 0.35em;
  border-radius: 3px;
  font-size: 0.875em;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

a { color: #2563eb; }

table { font-family: inherit; }