/* pg-web.dev docs site — clean, readable, minimal */
:root {
  --fg: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --bg: #ffffff;
  --code-bg: #f8fafc;
  --border: #e5e7eb;
  --nav-bg: #f8fafc;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  margin: 0;
  padding: 0;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

nav .brand {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--fg);
  white-space: nowrap;
}

nav .brand span { color: var(--accent); }

nav a {
  color: var(--fg);
  font-size: 0.95rem;
}
nav a.active, nav a:hover { color: var(--accent); }

main {
  max-width: 780px;
  margin: 2rem auto;
  padding: 0 1rem 4rem;
}

h1 { font-size: 2rem; margin: 0 0 1rem; line-height: 1.2; }
h2 { font-size: 1.35rem; margin: 2rem 0 0.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
h3 { font-size: 1.1rem; margin: 1.25rem 0 0.5rem; }

p, ul, ol { margin: 0.75rem 0; }
ul, ol { padding-left: 1.25rem; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.9rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1rem 0;
}

code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
}
th, td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}
th { background: var(--nav-bg); font-weight: 600; }

.callout {
  background: #f0f7ff;
  border-left: 4px solid var(--accent);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  border-radius: 0 4px 4px 0;
}

.callout strong { color: #1e40af; }

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  max-width: 780px;
  margin: 0 auto;
}

footer a { color: var(--muted); }

.badge {
  display: inline-block;
  background: #ecfdf5;
  color: #065f46;
  font-size: 0.75rem;
  padding: 0.1em 0.5em;
  border-radius: 999px;
  border: 1px solid #a7f3d0;
  vertical-align: middle;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.5rem 1rem;
  margin: 1rem 0;
}

@media (max-width: 640px) {
  nav { gap: 0.75rem; }
  main { margin-top: 1.25rem; }
}