/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height-mobile);
  display: flex;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(25, 25, 25, 0.85);
  }
}

@media (min-width: 900px) {
  .site-header {
    height: var(--header-height);
  }
}

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

/* Logo: icon box + text */
.site-logo {
  flex-grow: 1;
}

@media (min-width: 900px) {
  .site-logo {
    flex-grow: 0;
  }
}

.site-logo a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-primary);
  text-decoration: none;
}

.site-logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.site-logo-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--color-text-inverse);
}

.site-logo-text {
  font-size: 1.15rem;
  font-weight: var(--font-weight-heavy);
  letter-spacing: -0.04em;
}

/* Navigation (center-positioned on desktop) */
.site-nav {
  display: none;
}

@media (min-width: 900px) {
  .site-nav {
    display: flex;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
}

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

.site-nav a {
  font-weight: var(--font-weight-regular);
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
  text-decoration: none;
}

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

/* Header actions (right side) */
.header-actions {
  display: none;
  align-items: center;
  gap: 16px;
}

@media (min-width: 900px) {
  .header-actions {
    display: flex;
  }
}

/* Contact pill button in header */
.header-cta-btn {
  display: inline-flex;
  align-items: center;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-full);
  padding: 8px 24px;
  font-family: var(--font-family-primary);
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.header-cta-btn:hover {
  opacity: 0.9;
  color: var(--color-text-inverse);
}

/* Mobile menu toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

@media (min-width: 900px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* Mobile nav open state */
.site-nav.is-open {
  display: flex;
  position: absolute;
  top: var(--header-height-mobile);
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-lg);
  z-index: 99;
}

@media (prefers-color-scheme: dark) {
  .site-nav.is-open {
    background: rgba(25, 25, 25, 0.98);
  }
}

.site-nav.is-open ul {
  flex-direction: column;
  width: 100%;
  gap: 0;
}

.site-nav.is-open li {
  border-bottom: 1px solid var(--color-border);
}

.site-nav.is-open a {
  display: block;
  padding: var(--space-md) 0;
}

/* 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 {
  opacity: 0.9;
  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: rgba(59, 130, 246, 0.1);
  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-bg-primary);
  color: var(--color-text-primary);
  border-top: 1px solid var(--color-border);
  padding: 80px 0 40px;
  margin-top: var(--space-3xl);
}

.site-footer a {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Footer grid — 5:3:4 ratio matching main site */
.footer-grid {
  display: grid;
  grid-template-columns: 5fr 3fr 4fr;
  gap: var(--space-3xl);
  margin-bottom: 80px;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Footer brand */
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  text-decoration: none;
  color: inherit;
}

.footer-logo:hover {
  color: inherit;
}

.footer-logo-icon {
  width: 24px;
  height: 24px;
  background-color: var(--color-primary);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.footer-logo-icon svg {
  width: 14px;
  height: 14px;
  fill: var(--color-text-inverse);
}

.footer-logo-text {
  font-size: 1rem;
  font-weight: var(--font-weight-heavy);
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.footer-tagline {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 280px;
}

/* Footer column headings */
.footer-heading {
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-disabled);
  margin-bottom: 24px;
}

/* Footer nav links */
.footer-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-nav a {
  font-weight: var(--font-weight-bold);
  font-size: 0.875rem;
}

/* Social icon buttons */
.footer-social {
  display: flex;
  gap: 8px;
}

.footer-social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-primary);
  background: transparent;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
  text-decoration: none;
}

.footer-social-btn:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.footer-social-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Footer divider + copyright */
.footer-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.footer-bottom {
  font-size: 0.7rem;
  color: var(--color-text-disabled);
  text-align: left;
}

@media (max-width: 600px) {
  .footer-bottom {
    text-align: center;
  }
}