/* Documentation layout — runoob leftcolumn + article */
.rn-doc {
  display: flex;
  align-items: flex-start;
  gap: 0;
  max-width: var(--rn-content-max);
  margin: 16px auto 0;
  padding: 0 10px 32px;
}

.rn-doc__sidebar {
  width: var(--rn-sidebar-width);
  flex-shrink: 0;
  margin-right: 12px;
}

.rn-doc__sidebar.is-sticky {
  position: sticky;
  top: 12px;
  max-height: calc(100vh - 24px);
  overflow-y: auto;
  align-self: flex-start;
  z-index: 1;
}

.rn-doc__sidebar-title,
.rn-doc .rn-tab {
  margin: 0;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: var(--rn-primary);
  border-radius: 4px 4px 0 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

.rn-doc__nav-wrap {
  background: #fff;
  border: 1px solid var(--rn-primary-border);
  border-top: none;
  box-shadow: var(--rn-shadow-sm);
}

.rn-doc__nav,
.rn-doc .rn-design {
  list-style: none;
  margin: 0;
  padding: 4px;
  overflow: hidden;
}

.rn-doc__nav a,
.rn-doc .rn-design a {
  display: block;
  background-color: #f2efe9;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 10px rgba(0, 0, 0, 0.03);
  text-decoration: none;
  border-bottom: 1px solid var(--rn-border);
  color: #0f1a1c;
  line-height: 1.6;
  padding: 8px 10px;
  font-size: 13px;
  transition: all var(--rn-transition);
}

.rn-doc__nav a:hover,
.rn-doc .rn-design a:hover {
  font-weight: 700;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.06);
  color: var(--rn-primary-dark);
  text-decoration: none;
}

.rn-doc__nav a.is-active,
.rn-doc .rn-design a.is-active {
  color: #2f3e2f;
  background: linear-gradient(145deg, #e6eddc, #d2dfbf);
  font-weight: 700;
}

.rn-doc__group-label {
  padding: 10px 10px 4px;
  font-size: 12px;
  font-weight: 700;
  color: var(--rn-text-muted);
}

.rn-doc__content {
  flex: 1;
  min-width: 0;
  background: var(--rn-bg-light);
  border: 1px solid var(--rn-border);
  margin-bottom: 20px;
}

.rn-doc-toggle {
  display: none;
  position: fixed;
  left: 12px;
  bottom: 80px;
  z-index: 850;
  border: 0;
  background: var(--rn-primary);
  color: #fff;
  padding: 8px 12px;
  border-radius: 2px;
  font-size: 13px;
  box-shadow: var(--rn-shadow-sm);
  cursor: pointer;
}

.rn-series-hero {
  padding: 20px 30px;
  background: #fbfbfb;
  border-bottom: 1px solid var(--rn-border);
}

.rn-series-hero h1 {
  margin: 0 0 8px;
  color: var(--rn-text);
  font-size: 1.6rem;
}

.rn-series-hero p {
  margin: 0;
  color: var(--rn-text-muted);
  font-size: 14px;
  line-height: 1.8;
}

.rn-series-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rn-series-list li {
  border-bottom: 1px solid var(--rn-border);
}

.rn-series-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 30px;
  color: var(--rn-text);
  text-decoration: none;
  font-size: 14px;
}

.rn-series-list a:hover {
  background: var(--rn-primary-soft-2);
  color: var(--rn-primary-dark);
}

.rn-series-list .rn-meta {
  font-size: 12px;
  color: var(--rn-text-faint);
}