/* ==========================================================================
   xxyun BRAND LANDING PAGE — ARTICLE STYLING
   Butter Geometric Art Gallery Editorial Layout
   ========================================================================== */

.article-hero {
  border-bottom: 1.5px solid var(--border);
  background-color: var(--white);
  padding: 4rem 0 3rem 0;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.article-breadcrumb a:hover {
  text-decoration: underline;
  color: var(--text);
}

.article-header-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.article-tag {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  background-color: var(--butter);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.article-date, .article-readtime {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.article-title {
  font-family: var(--font-title);
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  max-width: 960px;
}

.article-lead {
  font-size: 1.1875rem;
  line-height: 1.7;
  color: var(--text);
  max-width: 860px;
  padding-left: 1.5rem;
  border-left: 3px solid var(--border);
}

/* Article Layout: Main Content + Sidebar */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  padding: 4rem 0 6rem 0;
}

.article-content {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text);
}

.article-content h2 {
  font-family: var(--font-title);
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  margin: 3rem 0 1.25rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1.5px solid var(--border);
}

.article-content h3 {
  font-family: var(--font-title);
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin: 2rem 0 1rem 0;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content ul, .article-content ol {
  margin: 1.5rem 0 1.5rem 1.5rem;
  padding-left: 1rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  background-color: var(--butter);
  border-left: 4px solid var(--border);
  border: 1.5px solid var(--border);
  border-left-width: 6px;
  padding: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
}

.article-content blockquote p {
  margin-bottom: 0;
}

.article-geo-callout {
  border: 1.5px solid var(--border);
  background-color: var(--cyan);
  padding: 1.5rem;
  margin: 2.5rem 0;
  box-shadow: 4px 4px 0 var(--border);
}

.callout-title {
  font-family: var(--font-title);
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

/* Article Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.sidebar-card {
  border: 1.5px solid var(--border);
  background-color: var(--white);
  padding: 1.75rem;
  box-shadow: 4px 4px 0 var(--border);
}

.sidebar-card.cta-card {
  background-color: var(--lilac);
}

.sidebar-card-title {
  font-family: var(--font-title);
  font-size: 1.125rem;
  margin-bottom: 1rem;
  border-bottom: 1.5px solid var(--border);
  padding-bottom: 0.5rem;
}

.sidebar-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sidebar-nav-list a {
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--text);
  display: block;
  padding: 0.25rem 0;
  border-bottom: 1px dashed var(--border-light);
}

.sidebar-nav-list a:hover {
  color: #000;
  text-decoration: underline;
}

@media (max-width: 992px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}