/* ============================================
   ArcheMotion — Blog & Technical Guides CSS
   Responsive, Content-Rich & Reader-Focused
   ============================================ */

/* --- Blog Hero & Layout --- */
.blog-hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
  text-align: center;
  background: radial-gradient(circle at 50% 10%, rgba(107, 63, 160, 0.06), transparent 70%);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-2xl);
}

.blog-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(107, 63, 160, 0.08);
  border: 1px solid rgba(107, 63, 160, 0.2);
  color: var(--color-purple);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.blog-hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  color: var(--color-black);
}

.blog-hero-desc {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Category Filter Pills --- */
.blog-categories {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: var(--space-xl);
}

.category-pill {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  cursor: pointer;
  transition: all var(--transition-base);
}

.category-pill:hover,
.category-pill.active {
  background: var(--color-purple);
  color: #FFFFFF;
  border-color: var(--color-purple);
  box-shadow: 0 4px 12px rgba(107, 63, 160, 0.25);
  transform: translateY(-1px);
}

/* --- Blog Cards Grid --- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-4xl);
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(107, 63, 160, 0.35);
}

.blog-card-media {
  height: 190px;
  background: linear-gradient(135deg, #1A1A2E, #2D2D44);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.blog-card-media-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(107, 63, 160, 0.35), transparent 75%);
  pointer-events: none;
}

.blog-card-icon {
  font-size: 3.5rem;
  z-index: 1;
  transition: transform var(--transition-spring);
}

.blog-card:hover .blog-card-icon {
  transform: scale(1.12);
}

.blog-card-body {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-card-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
  font-size: 0.8rem;
}

.blog-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.blog-tag-ai { background: rgba(107, 63, 160, 0.1); color: var(--color-purple); }
.blog-tag-shift { background: rgba(59, 130, 246, 0.1); color: #2563EB; }
.blog-tag-inventory { background: rgba(16, 185, 129, 0.1); color: #059669; }
.blog-tag-vision { background: rgba(245, 158, 11, 0.1); color: #D97706; }
.blog-tag-trend { background: rgba(225, 29, 72, 0.1); color: #E11D48; }
.blog-tag-cinema { background: rgba(168, 85, 247, 0.12); color: #9333EA; }
.blog-tag-essay { background: rgba(14, 165, 233, 0.12); color: #0284C7; }

.blog-read-time {
  color: var(--color-muted-light);
  font-weight: 500;
}

.blog-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: var(--space-sm);
  color: var(--color-black);
  transition: color var(--transition-fast);
}

.blog-card:hover .blog-card-title {
  color: var(--color-purple);
}

.blog-card-excerpt {
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: var(--space-lg);
  flex: 1;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #F1F5F9;
  padding-top: var(--space-md);
  font-size: 0.85rem;
  color: var(--color-muted);
}

.blog-read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  color: var(--color-purple);
  transition: transform var(--transition-fast);
}

.blog-card:hover .blog-read-more {
  transform: translateX(4px);
}

/* ============================================
   Article Detail Page Styles
   ============================================ */
.article-container {
  max-width: 820px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md) var(--space-4xl);
}

/* Breadcrumbs */
.article-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.article-breadcrumbs a {
  color: var(--color-muted);
}

.article-breadcrumbs a:hover {
  color: var(--color-purple);
}

.article-breadcrumbs .sep {
  color: var(--color-muted-light);
}

/* Article Header */
.article-header {
  margin-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-xl);
}

.article-header-badge-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.article-title {
  font-size: clamp(2rem, 4vw, 2.85rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-black);
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  color: var(--color-muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Article Body Content */
.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #2D2D44;
}

.article-lead {
  font-size: 1.2rem;
  line-height: 1.8;
  color: var(--color-black);
  font-weight: 500;
  background: rgba(107, 63, 160, 0.04);
  border-left: 4px solid var(--color-purple);
  padding: var(--space-lg) var(--space-xl);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: var(--space-2xl);
}

.article-body h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin: var(--space-2xl) 0 var(--space-md);
  color: var(--color-black);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid #F1F5F9;
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: var(--space-xl) 0 var(--space-sm);
  color: var(--color-black);
}

.article-body p {
  margin-bottom: var(--space-lg);
}

.article-body ul, 
.article-body ol {
  margin-bottom: var(--space-xl);
  padding-left: 1.5rem;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: var(--space-sm);
  line-height: 1.75;
}

.article-body strong {
  color: var(--color-black);
  font-weight: 700;
}

/* Callout Boxes */
.callout {
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-md);
  margin: var(--space-xl) 0;
  font-size: 0.98rem;
  line-height: 1.75;
}

.callout-info {
  background: #F8FAFC;
  border: 1px solid #CBD5E1;
  border-left: 5px solid #3B82F6;
}

.callout-tip {
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  border-left: 5px solid #10B981;
}

.callout-warning {
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-left: 5px solid #F59E0B;
}

.callout-title {
  font-weight: 700;
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-black);
}

/* Prompt & Code Box */
.prompt-box {
  background: #1A1A2E;
  border: 1px solid #2D2D44;
  border-radius: var(--radius-md);
  margin: var(--space-xl) 0;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.prompt-box-header {
  background: #111122;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #2D2D44;
  font-size: 0.8rem;
  font-weight: 600;
  color: #9CA3AF;
  font-family: 'JetBrains Mono', monospace, monospace;
}

.prompt-box-content {
  padding: var(--space-lg);
  color: #F3F4F6;
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  font-size: 0.92rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  user-select: all;
}

/* Comparison Tables */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space-xl) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  background: var(--color-surface);
}

.comparison-table th {
  background: #F8FAFC;
  padding: 12px 16px;
  font-weight: 700;
  color: var(--color-black);
  border-bottom: 2px solid var(--color-border);
}

.comparison-table td {
  padding: 12px 16px;
  border-bottom: 1px solid #F1F5F9;
  color: #374151;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover td {
  background: #FAFAF7;
}

/* Tool CTA Card */
.tool-cta-card {
  background: linear-gradient(135deg, rgba(107, 63, 160, 0.08), rgba(201, 168, 76, 0.12));
  border: 1.5px solid rgba(107, 63, 160, 0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-3xl) 0 var(--space-2xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.tool-cta-text h4 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-black);
  margin-bottom: 4px;
}

.tool-cta-text p {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin: 0;
}

.tool-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--color-purple), #4F46E5);
  color: #FFFFFF !important;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  box-shadow: 0 4px 14px rgba(107, 63, 160, 0.3);
  transition: all var(--transition-base);
}

.tool-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(107, 63, 160, 0.45);
}

/* FAQ Section in Articles */
.faq-block {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

.faq-q {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-black);
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.faq-q::before {
  content: 'Q.';
  color: var(--color-purple);
  font-weight: 800;
}

.faq-a {
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
  padding-left: 1.4rem;
}

/* Author Box */
.author-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
}

.author-avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 2px solid var(--color-purple);
  padding: 4px;
  flex-shrink: 0;
}

.author-info h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 4px;
}

.author-info p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.6;
}

/* Footer Nav Back Link */
.article-nav-footer {
  margin-top: var(--space-2xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.btn-back-blog {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-purple);
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-back-blog:hover {
  text-decoration: underline;
}