:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --code-bg: #0a0d12;
}

* { box-sizing: border-box; }

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

#nav-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 20px;
  padding: 4px 10px;
  cursor: pointer;
}

#sidebar {
  width: 250px;
  min-height: 100vh;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  flex-shrink: 0;
}

#sidebar .brand {
  padding: 0 24px 16px;
  font-weight: 700;
  font-size: 17px;
}

#sidebar .brand span {
  font-weight: 400;
  font-size: 12px;
  color: var(--muted);
}

#sidebar a {
  display: block;
  padding: 7px 24px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14.5px;
}

#sidebar a:hover { color: var(--text); }
#sidebar a.active { color: var(--accent); border-left: 2px solid var(--accent); }

#sidebar .side-links {
  margin-top: 20px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

main {
  max-width: 860px;
  padding: 40px 48px 80px;
  margin: 0 auto;
  min-width: 0;
}

section { margin-bottom: 56px; }

h1 { font-size: 2.2em; margin-bottom: 0; }
h2 { border-bottom: 1px solid var(--border); padding-bottom: 8px; }
h3 { margin-top: 28px; }

.tagline { font-size: 1.25em; color: var(--muted); }

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

pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-size: 13.5px;
}

code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
p code, li code, td code {
  background: var(--panel);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  padding: 3px 9px;
  cursor: pointer;
}

.copy-btn:hover { color: var(--text); }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14.5px;
  margin: 16px 0;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}

th { background: var(--panel); }

footer {
  color: var(--muted);
  font-size: 13.5px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

@media (max-width: 800px) {
  #nav-toggle { display: block; }
  #sidebar {
    position: fixed;
    z-index: 10;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }
  body.nav-open #sidebar { transform: none; }
  main { padding: 64px 20px 60px; }
}