:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #21262d;
  --border: #30363d;
  --text: #c9d1d9;
  --text-secondary: #8b949e;
  --accent: #58a6ff;
  --accent-2: #3fb950;
  --danger: #f85149;
  --warning: #d29922;
  --code-bg: #161b22;
  --max-width: 900px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover { color: var(--accent); }

main.container { padding: 2.5rem 1.25rem; }

.page-content h1, .page-content h2, .page-content h3, .page-content h4 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.page-content h1 { font-size: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.page-content h2 { font-size: 1.5rem; }
.page-content h3 { font-size: 1.2rem; color: var(--accent); }
.page-content h4 { font-size: 1.05rem; color: var(--text-secondary); }

.page-content p { margin: 0.75rem 0; }

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

code {
  background: var(--code-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  border: 1px solid var(--border);
}

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

pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: 0.85em;
}

.highlight { margin: 1rem 0; }
.highlight pre { margin: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.75rem;
  text-align: left;
}

th { background: var(--surface); font-weight: 600; }

tr:nth-child(even) { background: var(--surface); }

ul, ol { margin: 0.75rem 0; padding-left: 1.5rem; }

li { margin: 0.35rem 0; }

blockquote {
  border-left: 4px solid var(--accent);
  margin: 1rem 0;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border-radius: 0 8px 8px 0;
}

.note {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 1rem;
  margin: 1rem 0;
}

.note.warning { border-left-color: var(--warning); }
.note.danger { border-left-color: var(--danger); }

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge.json { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.badge.tsv { background: rgba(63, 185, 80, 0.15); color: var(--accent-2); }
.badge.write { background: rgba(248, 81, 73, 0.15); color: var(--danger); }

.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.toc ul { margin: 0; padding-left: 1.25rem; }
.toc > ul { padding-left: 0; list-style: none; }
.toc li { margin: 0.25rem 0; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}

.hero h1 { border-bottom: none; font-size: 2.5rem; margin-bottom: 0.5rem; }
.hero p { font-size: 1.15rem; color: var(--text-secondary); max-width: 640px; margin: 0 auto 1.5rem; }

.cta {
  display: inline-flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--border);
}

.btn.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn.secondary { background: var(--surface); color: var(--text); }
.btn:hover { text-decoration: none; opacity: 0.9; }

/* Badge row under the hero. Flexbox so the badges centre-align and
   wrap cleanly on narrow viewports; no negative margins, no <p>
   hack. Each badge image inherits its natural shields.io size
   (~20 px tall, ~100-160 px wide). */
.badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem auto 2rem;
  max-width: 720px;
}
.badges a { display: inline-flex; line-height: 0; }
.badges img { height: 20px; width: auto; vertical-align: middle; }

@media (max-width: 600px) {
  .site-header .container { flex-direction: column; align-items: flex-start; }
  .hero h1 { font-size: 2rem; }
  main.container { padding: 1.5rem 1rem; }
}