/* Knowledge Center, Guides & Article Templates */

.article-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 3rem;
  align-items: flex-start;
  padding: 3rem 0;
}

.article-toc-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.article-toc-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-heading);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.article-toc-link {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: block;
}

.article-toc-link:hover, .article-toc-link.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary-blue);
  font-weight: var(--font-weight-semibold);
}

.article-main-content {
  background-color: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-subtle);
  padding: 2.5rem;
}

.article-meta-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.article-meta-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.article-meta-badge {
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  background-color: var(--color-bg-subtle);
  color: var(--color-text-muted);
}

.article-meta-badge.category {
  background-color: var(--color-primary-light);
  color: var(--color-primary-blue);
}

.article-title {
  font-size: var(--font-size-3xl);
  margin-bottom: 1rem;
}

.article-intro {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* Step Container inside Guide */
.step-container {
  margin: 2.5rem 0;
}

.step-card {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  background-color: #FFFFFF;
  position: relative;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.step-badge-number {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-blue);
  color: #FFFFFF;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-card-title {
  font-size: var(--font-size-lg);
  color: var(--color-text-heading);
}

.step-body p {
  margin-bottom: 0.75rem;
  color: var(--color-text-main);
}

/* Callout Boxes */
.callout {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  display: flex;
  gap: 1rem;
}

.callout-info {
  background-color: var(--color-primary-light);
  border-left: 4px solid var(--color-primary-blue);
  color: var(--color-primary-deep);
}

.callout-warning {
  background-color: var(--color-warning-bg);
  border-left: 4px solid var(--color-warning);
  color: #78350F;
}

.callout-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* In-Article Lead Banner */
.article-lead-banner {
  background: linear-gradient(135deg, var(--color-primary-deep) 0%, #1E3A8A 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.article-lead-banner h3 {
  color: #FFFFFF;
  margin-bottom: 0.5rem;
}

.article-lead-banner p {
  color: #E2E8F0;
  font-size: var(--font-size-sm);
}

@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-toc-sidebar {
    position: static;
  }
  .article-lead-banner {
    flex-direction: column;
    text-align: center;
  }
}