body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  display: flex;
  flex: 1;
}

.site-header {
  background: #151b23;
  color: #f0f6fc;
  padding: 1rem;
  text-align: center;
  border-bottom: 1px solid #3d444d;
}

.site-header a {
  color: inherit;
  text-decoration: none;
}

.sidebar {
  width: 220px;
  background: #0d1117;
  border-right: 1px solid #3d444d;
  padding: 1rem;
  overflow-y: auto;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";
}

.sidebar ul {
  list-style: none;
  padding-left: 0;
}

.sidebar ul ul {
  padding-left: 5px;
}

.sidebar li {
  margin-bottom: 0.5rem;
}

.sidebar a {
  color: #58a6ff;
  text-decoration: none;
}

.sidebar .category {
  margin-top: 1rem;
  font-weight: 600;
  color: #c9d1d9;
}

.sidebar .subcategory {
  margin-top: 0.5rem;
  font-weight: 600;
  color: #c9d1d9;
}

.markdown-body {
  padding: 2rem;
  flex: 1;
}