:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #21262d;
  --border: #30363d;
  --accent: #58a6ff;
  --accent2: #3fb950;
  --warn: #d29922;
  --text: #c9d1d9;
  --muted: #8b949e;
  --code-bg: #1c2128;
  --tag-es20: #1f6feb;
  --tag-es30: #388bfd;
  --tag-es31: #79c0ff;
  --tag-es32: #cae8ff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  height: 56px;
  gap: 2rem;
}
.site-header .logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  white-space: nowrap;
}
.site-header nav { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.site-header nav a { color: var(--muted); font-size: 0.9rem; }
.site-header nav a:hover, .site-header nav a.active { color: var(--text); text-decoration: none; }

.layout { display: flex; min-height: calc(100vh - 56px); }

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
}
.sidebar h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 1rem 0 0.4rem;
}
.sidebar h3:first-child { margin-top: 0; }
.sidebar ul { list-style: none; }
.sidebar ul li a {
  display: block;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  color: var(--muted);
  font-size: 0.875rem;
}
.sidebar ul li a:hover, .sidebar ul li a.active {
  background: var(--surface2);
  color: var(--text);
  text-decoration: none;
}

.content {
  flex: 1;
  padding: 2.5rem 3rem;
  max-width: 900px;
}
.content h1 { font-size: 2rem; margin-bottom: 0.5rem; color: #fff; }
.content h2 { font-size: 1.4rem; margin: 2rem 0 0.75rem; color: #fff; border-bottom: 1px solid var(--border); padding-bottom: 0.4rem; }
.content h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; color: var(--accent); }
.content h4 { font-size: 0.95rem; margin: 1rem 0 0.4rem; color: var(--text); }
.content p { margin-bottom: 0.9rem; }
.content ul, .content ol { margin: 0.5rem 0 0.9rem 1.5rem; }
.content li { margin-bottom: 0.3rem; }

/* Code */
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  margin: 0.8rem 0 1.2rem;
  font-size: 0.85rem;
  line-height: 1.55;
}
code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
p code, li code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.15em 0.35em;
  font-size: 0.85em;
}

/* Keywords highlight */
.kw { color: #ff7b72; }
.ty { color: #79c0ff; }
.cm { color: #8b949e; }
.st { color: #a5d6ff; }
.nm { color: #e3b341; }
.fn { color: #d2a8ff; }
.val { color: #79c0ff; }

/* Tags */
.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.1em 0.45em;
  border-radius: 3px;
  vertical-align: middle;
  margin-left: 0.3em;
}
.tag-es20 { background: var(--tag-es20); color: #fff; }
.tag-es30 { background: var(--tag-es30); color: #fff; }
.tag-es31 { background: var(--tag-es31); color: #000; }
.tag-es32 { background: var(--tag-es32); color: #000; }
.tag-new  { background: var(--accent2); color: #000; }

/* Cards / boxes */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.2rem;
}
.card h3 { margin-top: 0; }

.callout {
  border-left: 3px solid var(--accent);
  background: var(--surface2);
  border-radius: 0 6px 6px 0;
  padding: 0.8rem 1rem;
  margin: 1rem 0;
}
.callout.warn { border-color: var(--warn); }
.callout.ok   { border-color: var(--accent2); }
.callout p:last-child { margin: 0; }

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.8rem 0 1.2rem;
  font-size: 0.875rem;
}
th {
  background: var(--surface2);
  text-align: left;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--border);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
td {
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--border);
  vertical-align: top;
}
tr:nth-child(even) td { background: var(--surface); }

/* Hero */
.hero {
  background: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem 2.5rem;
  margin-bottom: 2rem;
}
.hero h1 { font-size: 2.4rem; }
.hero p { color: var(--muted); font-size: 1.05rem; margin-top: 0.6rem; }

/* Enum table */
.enum-value {
  font-family: monospace;
  color: var(--accent);
  font-size: 0.85rem;
}
.enum-gl {
  font-family: monospace;
  color: var(--muted);
  font-size: 0.82rem;
}

/* Grid */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
@media (max-width: 700px) { .grid2 { grid-template-columns: 1fr; } }

.badge {
  display: inline-block;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.2em 0.7em;
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0.2em;
}

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}