/* ===== Site Layout — 3-column with persistent sidebars ===== */

.site-layout {
  display: grid;
  grid-template-columns: 1fr;
  min-height: calc(100vh - var(--header-height));
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

/* ===== Sidebars — hidden on mobile/tablet ===== */

.sidebar {
  display: none;
}

/* ===== Desktop 3-column layout ===== */

@media (min-width: 1200px) {
  .site-layout {
    grid-template-columns: 220px 1fr 280px;
    gap: 0;
    padding-left: 24px;
    padding-right: 24px;
  }

  .sidebar {
    display: block;
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    overflow-y: auto;
    padding: 20px 0;
    scrollbar-width: none;
  }

  .sidebar::-webkit-scrollbar {
    display: none;
  }
}

/* Wider screens get more breathing room */
@media (min-width: 1600px) {
  .site-layout {
    grid-template-columns: 240px 1fr 300px;
    max-width: 1540px;
  }
}

/* ===== Left Sidebar ===== */

.sidebar-left {
  padding-right: 16px;
  border-right: 1px solid var(--divider);
}

.sidebar-nav-group {
  margin-bottom: 24px;
}

.sidebar-nav-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  padding: 0 12px;
  margin-bottom: 8px;
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.15s, color 0.15s;
}

.sidebar-nav-link:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-nav-link.active {
  background: var(--brand-muted);
  color: var(--brand-primary);
}

.sidebar-nav-link.active:hover {
  background: var(--brand-muted);
  color: var(--brand-primary);
}

.sidebar-nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-nav-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.sidebar-divider {
  height: 1px;
  background: var(--divider);
  margin: 12px 0;
}

/* ===== Right Sidebar ===== */

.sidebar-right {
  padding-left: 16px;
  border-left: 1px solid var(--divider);
}

.sidebar-widget {
  margin-bottom: 24px;
}

.sidebar-widget-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0 0 12px;
  border-bottom: 1px solid var(--divider);
  margin-bottom: 12px;
}

/* Popular articles widget */
.sidebar-article-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-article-item {
  display: flex;
  gap: 10px;
  color: var(--text-primary);
  transition: color 0.15s;
}

.sidebar-article-item:hover {
  color: var(--brand-primary);
}

.sidebar-article-rank {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-tertiary);
  min-width: 20px;
  line-height: 1.3;
}

.sidebar-article-info {
  flex: 1;
  min-width: 0;
}

.sidebar-article-title {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-article-meta {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* Tags widget */
.sidebar-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sidebar-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  transition: background-color 0.15s, color 0.15s;
}

.sidebar-tag:hover {
  background: var(--brand-muted);
  color: var(--brand-primary);
}

/* Skeleton loading for sidebar widgets */
.sidebar-skeleton-line {
  height: 14px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.sidebar-skeleton-line:last-child {
  width: 60%;
}

/* ===== Adjust main content in layout ===== */

.site-layout main {
  min-width: 0;
  padding-top: 0;
}