:root {
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #57606a;
  --border: #d8dee4;
  --code-bg: #f6f8fa;
  --accent: #1a73e8;
  --accent-2: #2fa84f;
  --accent-3: #1fa774;
  --link: #1a73e8;
  --nav-bg: #0b1f3a;
  --nav-fg: #ffffff;
  --max-width: 880px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --border: #30363d;
    --code-bg: #161b22;
    --link: #6cb6ff;
    --nav-bg: #05101f;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

nav.top {
  background: var(--nav-bg);
  color: var(--nav-fg);
  padding: 0.9rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

nav.top .brand {
  font-weight: 700;
  font-size: 1.05rem;
  margin-right: auto;
  white-space: nowrap;
}

nav.top .brand span { color: var(--accent-2); }

nav.top a {
  color: var(--nav-fg);
  text-decoration: none;
  font-size: 0.92rem;
  opacity: 0.9;
  white-space: nowrap;
}

nav.top a:hover { opacity: 1; text-decoration: underline; }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  scroll-margin-top: 4.5rem;
}

h1 { font-size: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
h2 { font-size: 1.4rem; margin-top: 2.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.35rem; }
h3 { font-size: 1.1rem; margin-top: 1.75rem; }

a { color: var(--link); }

blockquote {
  margin: 1rem 0;
  padding: 0.1rem 1rem;
  border-left: 3px solid var(--accent-3);
  color: var(--muted);
  background: var(--code-bg);
  border-radius: 0 6px 6px 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}

pre code { background: none; padding: 0; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  display: block;
  overflow-x: auto;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

th { background: var(--code-bg); }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

ul, ol { padding-left: 1.4rem; }

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}

.badge-row a {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--fg);
  background: var(--code-bg);
}

.badge-row a:hover { border-color: var(--accent); color: var(--accent); }