/* Hub Hero */
.hub-hero {
  padding: 80px 0 60px 0;
  position: relative;
  text-align: center;
}

.hero-pill {
  margin-bottom: 24px;
  animation: floatSubtle 4s ease-in-out infinite;
}

@keyframes floatSubtle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.hub-hero h1 {
  font-size: 3.5rem;
  line-height: 1.15;
  max-width: 960px;
  margin: 0 auto 24px auto;
  font-weight: 800;
  letter-spacing: -0.035em;
}

.hub-hero p.lead {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 40px auto;
  line-height: 1.6;
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1040px;
  margin: 48px auto 0 auto;
}

.stat-box {
  padding: 20px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-align: center;
  backdrop-filter: blur(12px);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-display);
  color: var(--text-primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Featured Master Article Banner */
.featured-section {
  padding: 40px 0 60px 0;
}

.featured-card {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.6) 100%);
  border: 1px solid rgba(0, 242, 254, 0.35);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 242, 254, 0.15);
  transition: all var(--transition-smooth);
}

.featured-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 50px rgba(0, 242, 254, 0.25);
}

.featured-content {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.reading-time {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.featured-title {
  font-size: 2rem;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.featured-excerpt {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.65;
  margin-bottom: 28px;
}

.featured-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.author-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #080c14;
  font-size: 1rem;
}

.author-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.featured-visual {
  background: radial-gradient(circle at center, rgba(0, 242, 254, 0.12) 0%, rgba(15, 23, 42, 0.95) 75%);
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
}

.visual-mockup {
  width: 100%;
  max-width: 440px;
  background: rgba(10, 16, 28, 0.9);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
}

.mockup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 18px;
}

.mockup-dots {
  display: flex;
  gap: 6px;
}

.mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.mockup-dot.red { background: #ef4444; }
.mockup-dot.yellow { background: #eab308; }
.mockup-dot.green { background: #22c55e; }

.mockup-sync-pulse {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.mockup-metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

.mockup-metric {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 12px;
}

.metric-val {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-mono);
}

.metric-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.mockup-log {
  background: #060910;
  border-radius: 6px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #94a3b8;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.log-entry {
  display: flex;
  justify-content: space-between;
}
.log-success { color: #34d399; }
.log-accent { color: var(--accent-cyan); }

/* Filter & Search Bar */
.filter-search-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.category-pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.cat-btn {
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cat-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.cat-btn.active {
  background: var(--gradient-brand);
  color: #080c14;
  font-weight: 700;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(0, 242, 254, 0.3);
}

.search-box {
  position: relative;
  min-width: 280px;
}

.search-input {
  width: 100%;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 10px 18px 10px 42px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.25);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* Blog Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 64px;
}

.blog-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--gradient-dark-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-smooth);
}

.blog-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 242, 254, 0.4);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.6), 0 0 25px rgba(0, 242, 254, 0.12);
}

.card-img-wrap {
  height: 200px;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-img-wrap svg {
  width: 70px;
  height: 70px;
  opacity: 0.85;
  transition: transform var(--transition-smooth);
}

.blog-card:hover .card-img-wrap svg {
  transform: scale(1.1) rotate(2deg);
}

.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.card-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
  line-height: 1.35;
  color: var(--text-primary);
}

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

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

.card-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.card-author {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.read-more-link {
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Interactive ROI Hub Section */
.hub-roi-section {
  padding: 80px 0;
  background: radial-gradient(ellipse at center, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
}

.roi-card-wrapper {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(10, 16, 28, 0.95) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 40px rgba(16, 185, 129, 0.15);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.roi-controls {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.slider-group label {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.slider-val {
  color: var(--accent-emerald);
  font-family: var(--font-mono);
  font-size: 1.1rem;
}

.range-slider {
  width: 100%;
  height: 6px;
  background: #1e293b;
  border-radius: 6px;
  outline: none;
  -webkit-appearance: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-emerald);
  cursor: pointer;
  box-shadow: 0 0 12px var(--accent-emerald);
  transition: transform 0.1s ease;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.roi-results-box {
  background: rgba(6, 9, 16, 0.85);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
}

.roi-results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0;
}

.roi-metric-card {
  background: rgba(255, 255, 255, 0.03);
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.roi-num-large {
  font-size: 2.4rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #34d399;
}

.roi-num-sub {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.roi-metric-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 4px;
}

/* Architecture Framework Section */
.arch-preview-section {
  padding: 80px 0;
}

.arch-flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
  position: relative;
}

.arch-step-card {
  background: var(--gradient-dark-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  position: relative;
}

.step-number {
  position: absolute;
  top: -12px;
  left: 20px;
  background: var(--gradient-brand);
  color: #080c14;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.step-title {
  font-size: 1.15rem;
  margin-top: 8px;
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Responsive */
@media (max-width: 1024px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .featured-visual {
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .roi-card-wrapper {
    grid-template-columns: 1fr;
  }
  .arch-flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .hub-hero h1 {
    font-size: 2.25rem;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats-row {
    grid-template-columns: 1fr;
  }
  .arch-flow-grid {
    grid-template-columns: 1fr;
  }
  .featured-content {
    padding: 28px 20px;
  }
}