/* ===================================
   ARTICLE & PROJECT PAGE STYLES
=================================== */

.page-hero {
  padding: calc(var(--nav-h) + 56px) 0 64px;
  position: relative;
  overflow: hidden;
}

.page-hero .hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 204, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 204, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 28px;
  transition: color 0.2s;
}
.back-link:hover { color: var(--accent); }
.back-link i { font-size: 12px; }

.article-header-tags {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.page-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  max-width: 820px;
}

.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 48px;
  max-height: 440px;
}

.article-cover img {
  width: 100%;
  height: 440px;
  object-fit: cover;
  display: block;
}

.article-intro {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 32px;
}

.article-byline {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--card-border);
  flex-wrap: wrap;
}

.byline-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #050B18;
  flex-shrink: 0;
}

.byline-info strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
}

.byline-info span {
  font-size: 13px;
  color: var(--muted);
}

.byline-meta {
  display: flex;
  gap: 20px;
  margin-left: auto;
}

.byline-meta span {
  font-size: 13px;
  color: var(--dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Article body */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
  padding: 64px 0 100px;
}

.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 48px 0 16px;
  color: var(--text);
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--text);
}

.article-content p {
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.8;
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content ul li {
  list-style: disc;
}

.article-content ol li {
  list-style: decimal;
}

.article-content strong {
  color: var(--text);
  font-weight: 600;
}

.callout {
  background: var(--accent-dim);
  border: 1px solid rgba(0, 229, 204, 0.15);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 28px 0;
}

.callout p {
  margin: 0;
  color: var(--text);
  font-size: 15px;
}

.callout-title {
  font-weight: 700;
  color: var(--accent);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 14px;
  color: var(--accent);
}

pre {
  background: #020810;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  overflow-x: auto;
  margin: 24px 0;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
  color: #E2E8F0;
  line-height: 1.7;
}

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 32px);
}

.sidebar-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-card h4 {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 16px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-list a {
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s;
  line-height: 1.4;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.toc-list a::before {
  content: '';
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--dim);
  margin-top: 8px;
  flex-shrink: 0;
}
.toc-list a:hover {
  color: var(--accent);
}

.sidebar-cta {
  text-align: center;
}
.sidebar-cta p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.6;
}
.sidebar-cta .btn {
  width: 100%;
  justify-content: center;
}

/* Project page specifics */
.project-header-visual {
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 96px;
  color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  margin-bottom: 48px;
}

.project-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.project-meta-item {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.project-meta-item span {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--dim);
  margin-bottom: 8px;
}

.project-meta-item strong {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0;
}

.result-item {
  background: var(--accent-dim);
  border: 1px solid rgba(0, 229, 204, 0.15);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.result-item .result-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}

.result-item span:last-child {
  font-size: 13px;
  color: var(--muted);
}

/* Related articles / projects */
.related-section {
  border-top: 1px solid var(--card-border);
  padding: 64px 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.related-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 0.2s, transform 0.2s;
  display: block;
}
.related-card:hover {
  border-color: rgba(0, 229, 204, 0.3);
  transform: translateY(-3px);
}
.related-card .article-tag { margin-bottom: 10px; display: inline-block; }
.related-card h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

/* Responsive */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .project-meta-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .result-grid {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .article-sidebar {
    grid-template-columns: 1fr;
  }
  .project-meta-grid {
    grid-template-columns: 1fr 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .byline-meta {
    margin-left: 0;
    width: 100%;
  }
}