/* ============================================================
   QUANTEX — Interior Pages Stylesheet
   Service pages, Blog listing, Blog posts
   ============================================================ */

/* ── Breadcrumb ───────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--accent-light);
}

.breadcrumb-sep {
  color: var(--text-muted);
  opacity: 0.4;
  font-size: var(--text-xs);
}

.breadcrumb-current {
  color: var(--text-secondary);
}

/* ── Nav Dropdown ─────────────────────────────────────────── */
.nav-item {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.nav-dropdown-trigger:hover,
.nav-dropdown-trigger[aria-expanded="true"] {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.dropdown-arrow {
  transition: transform var(--transition);
  flex-shrink: 0;
}

.nav-dropdown-trigger[aria-expanded="true"] .dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  padding-top: calc(var(--space-2) + 8px);
  min-width: 240px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.03);
  display: none;
  z-index: 500;
  backdrop-filter: blur(20px);
}

.nav-dropdown.dropdown-open {
  display: block;
  animation: fade-up 0.2s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-dropdown-item:hover {
  background: rgba(59,130,246,0.08);
  color: var(--text-primary);
}

.dropdown-item-icon {
  font-size: 1rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

/* ── Page Hero (interior pages) ───────────────────────────── */
.page-hero {
  padding-top: calc(72px + 4rem);
  padding-bottom: 4rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 0%, black 30%, transparent 100%);
  pointer-events: none;
}

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

.page-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 1rem;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: var(--space-5);
}

.page-h1 {
  font-size: clamp(var(--text-3xl), 4.5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  max-width: 800px;
}

.page-intro {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 680px;
  margin-bottom: var(--space-8);
}

.page-hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ── Service Detail Section ───────────────────────────────── */
.content-section {
  padding-block: var(--space-16);
  border-top: 1px solid var(--border);
}

.content-section:first-of-type {
  border-top: none;
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: start;
}

.content-grid.reverse {
  direction: rtl;
}

.content-grid.reverse > * {
  direction: ltr;
}

.content-block h2 {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

.content-block p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.content-block p:last-child {
  margin-bottom: 0;
}

.content-block ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.content-block ul li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

.content-block ul li::before {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gradient);
  flex-shrink: 0;
  margin-top: 0.6em;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.feature-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-slow), background var(--transition-slow);
}

.feature-item:hover {
  border-color: rgba(59,130,246,0.2);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.15);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
  flex-shrink: 0;
}

.feature-text h3 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.feature-text p {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* ── Use Cases ────────────────────────────────────────────── */
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.use-case-card {
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-slow);
}

.use-case-card:hover {
  border-color: rgba(59,130,246,0.2);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.use-case-industry {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  margin-bottom: var(--space-3);
}

.use-case-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.use-case-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

.use-case-result {
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: rgba(16,185,129,0.06);
  border: 1px solid rgba(16,185,129,0.12);
  border-radius: var(--radius);
  font-size: var(--text-xs);
  color: rgba(110,231,183,0.8);
  font-weight: 500;
}

/* ── Service-specific FAQ ─────────────────────────────────── */
.page-faq {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
}

/* ── Page CTA ─────────────────────────────────────────────── */
.page-cta {
  padding-block: var(--space-24);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(59,130,246,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.page-cta-title {
  font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl));
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  position: relative;
}

.page-cta-sub {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.page-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  position: relative;
}

/* ── Blog Listing ─────────────────────────────────────────── */
.blog-hero {
  padding-top: calc(72px + 3rem);
  padding-bottom: 3rem;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-slow);
  text-decoration: none;
}

.blog-card:hover {
  border-color: rgba(59,130,246,0.25);
  transform: translateY(-3px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.blog-card-thumb {
  height: 180px;
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card-thumb-bg {
  position: absolute;
  inset: 0;
  opacity: 0.3;
}

.blog-card-thumb-icon {
  position: relative;
  z-index: 1;
  color: var(--accent-light);
  opacity: 0.6;
}

.blog-card-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.blog-card-category {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
}

.blog-card-read-time {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.blog-card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

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

.blog-card-excerpt {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.blog-card-date {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.blog-card-arrow {
  color: var(--accent-light);
  transition: transform var(--transition);
}

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

/* ── Blog Post ────────────────────────────────────────────── */
.post-hero {
  padding-top: calc(72px + 3rem);
  padding-bottom: 3rem;
  max-width: 800px;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.post-category {
  display: inline-flex;
  padding: 0.3rem 0.875rem;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-light);
}

.post-date,
.post-read-time {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.post-h1 {
  font-size: clamp(var(--text-3xl), 4vw, 2.75rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
}

.post-lead {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  line-height: 1.75;
  border-left: 3px solid var(--accent);
  padding-left: var(--space-5);
}

/* Post Content */
.post-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-12);
  align-items: start;
  padding-bottom: var(--space-16);
}

.post-content {
  max-width: 720px;
}

.post-content h2 {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  line-height: 1.25;
}

.post-content h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.post-content p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: var(--space-5);
}

.post-content ul,
.post-content ol {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.post-content ul li,
.post-content ol li {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: var(--space-5);
  position: relative;
}

.post-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  background: var(--gradient);
  border-radius: 50%;
}

.post-content ol {
  counter-reset: ol-counter;
}

.post-content ol li {
  counter-increment: ol-counter;
}

.post-content ol li::before {
  content: counter(ol-counter);
  position: absolute;
  left: 0;
  top: 0.1em;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--accent-light);
  font-family: var(--font-mono);
}

.post-content blockquote {
  margin-block: var(--space-8);
  padding: var(--space-6) var(--space-8);
  background: rgba(59,130,246,0.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  font-size: var(--text-lg);
  color: var(--text-secondary);
  font-style: italic;
  line-height: 1.7;
}

.post-content .highlight-box {
  margin-block: var(--space-8);
  padding: var(--space-6);
  background: rgba(59,130,246,0.07);
  border: 1px solid rgba(59,130,246,0.18);
  border-radius: var(--radius-xl);
}

.post-content .highlight-box p {
  margin: 0;
  color: var(--text-primary);
  font-weight: 500;
}

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

/* Sidebar */
.post-sidebar {
  position: sticky;
  top: calc(72px + 2rem);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.sidebar-card-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toc-list a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition);
  line-height: 1.5;
}

.toc-list a:hover {
  color: var(--accent-light);
}

.related-posts {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.related-post-link {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition);
  line-height: 1.5;
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
}

.related-post-link::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 0.55em;
}

.related-post-link:hover {
  color: var(--accent-light);
}

/* Post Footer */
.post-footer {
  border-top: 1px solid var(--border);
  padding-top: var(--space-10);
  margin-top: var(--space-10);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.post-tag {
  padding: 0.3rem 0.75rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: var(--text-xs);
  color: var(--text-muted);
  transition: all var(--transition);
}

.post-tag:hover {
  border-color: rgba(99,179,237,0.3);
  color: var(--accent-light);
}

.post-cta-box {
  background: var(--gradient-glow);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  text-align: center;
}

.post-cta-box h3 {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.post-cta-box p {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  font-size: var(--text-base);
  line-height: 1.7;
}

/* ── Stat Callout ─────────────────────────────────────────── */
.stat-callout {
  display: flex;
  gap: var(--space-8);
  padding: var(--space-8);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  margin-block: var(--space-8);
  flex-wrap: wrap;
}

.stat-callout-item {
  flex: 1;
  min-width: 120px;
  text-align: center;
}

.stat-callout-number {
  display: block;
  font-size: var(--text-4xl);
  font-weight: 900;
  font-family: var(--font-mono);
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: var(--space-2);
}

.stat-callout-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Responsive: Interior Pages ───────────────────────────── */
@media (max-width: 1023px) {
  .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .post-layout {
    grid-template-columns: 1fr;
  }

  .post-sidebar {
    position: static;
    order: -1;
  }
}

@media (max-width: 899px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .content-grid.reverse {
    direction: ltr;
  }
}

@media (max-width: 767px) {
  .nav-item.has-dropdown {
    width: 100%;
  }

  .nav-dropdown-trigger {
    width: 100%;
    justify-content: space-between;
    font-size: var(--text-base);
    padding: var(--space-4);
    border-bottom: 1px solid rgba(255,255,255,0.04);
    border-radius: var(--radius);
  }

  .nav-dropdown {
    position: static;
    transform: none;
    background: rgba(255,255,255,0.03);
    box-shadow: none;
    border-radius: var(--radius);
    margin-top: var(--space-2);
    width: 100%;
  }

  .use-cases-grid {
    grid-template-columns: 1fr;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .stat-callout {
    gap: var(--space-5);
  }

  .post-cover-img {
    height: 180px;
  }
}

/* ── Post Cover Image ─────────────────────────────────────── */
.post-cover-img {
  width: 100%;
  height: 260px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-top: var(--space-8);
  border: 1px solid rgba(59,130,246,0.15);
}

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