/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-logo {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-heavy);
  color: var(--color-primary);
}

.site-logo a {
  color: inherit;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
  padding: 0;
  margin: 0;
}

.site-nav a {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.site-nav a:hover,
.site-nav .current-menu-item a {
  color: var(--color-secondary);
}

.back-to-main {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Cards */
.card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-image {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  position: relative;
}

.card-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.card:hover .card-image img {
  transform: scale(1.03);
}

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

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.card-meta .separator {
  color: var(--color-border);
}

.card-title {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-sm);
}

.card-title a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.card-title a:hover {
  color: var(--color-secondary);
}

.card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  margin-top: auto;
  padding-top: var(--space-md);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-secondary);
  transition: gap var(--transition-fast);
}

.card:hover .card-link {
  gap: 10px;
}

.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.card:hover .card-link svg {
  transform: translateX(2px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background: #2563eb;
  color: var(--color-text-inverse);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-border);
  color: var(--color-text-primary);
}

.btn-outline:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

/* Tags / Labels */
.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.tag-case-study {
  background: #eff6ff;
  color: var(--color-secondary);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-3xl);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.pagination a:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.pagination .current {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
  border-color: var(--color-secondary);
}

/* Share buttons */
.share-buttons {
  display: flex;
  gap: var(--space-sm);
  margin: var(--space-xl) 0;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  color: var(--color-text-inverse);
  transition: opacity var(--transition-fast);
}

.share-btn:hover {
  opacity: 0.85;
  color: var(--color-text-inverse);
}

.share-btn-linkedin { background: #0077b5; }
.share-btn-twitter { background: #1da1f2; }
.share-btn-facebook { background: #1877f2; }

/* Footer */
.site-footer {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.7);
}

.site-footer a:hover {
  color: var(--color-text-inverse);
}

.footer-bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}