/* Sections: Hero, About, Features, How It Works, FAQ, Final CTA, Footer */

/* Hero Entrance Keyframes */
@keyframes heroEntranceFadeUp {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 2. Hero Section */
.hero-section {
  position: relative;
  z-index: 10;
  min-height: calc(88vh - var(--nav-height));
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 2.5rem) 0 4rem 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  width: 100%;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid rgba(0, 229, 255, 0.25);
  color: var(--accent-cyan);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  margin-bottom: 1.5rem;
  width: fit-content;
  animation: heroEntranceFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-title {
  font-size: clamp(2.5rem, 4.5vw, 4.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  text-wrap: balance;
  animation: heroEntranceFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

.hero-description {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 620px;
  margin-bottom: 2.25rem;
  text-wrap: balance;
  animation: heroEntranceFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  animation: heroEntranceFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

/* Hero Preview HUD / Interactive Engine Console */
.hero-preview-hud {
  background: rgba(14, 16, 23, 0.78);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.6), 0 0 32px rgba(0, 229, 255, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  animation: heroEntranceFadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.25s both;
}

.hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: rgba(8, 9, 12, 0.85);
  border-bottom: 1px solid var(--border-subtle);
}

.hud-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hud-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
}

.hud-dot.red { background: #ef4444; }
.hud-dot.amber { background: #f59e0b; }
.hud-dot.green { background: #10b981; }

.hud-title-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.hud-latency-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hud-latency-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulseLatency 2s infinite ease-in-out;
}

@keyframes pulseLatency {
  0%, 100% { opacity: 0.5; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.2); }
}

.hud-body {
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.hud-clock-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hud-time {
  font-family: var(--font-heading);
  font-size: clamp(2.75rem, 4.5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: #ffffff;
  line-height: 1;
  text-shadow: 0 0 24px rgba(0, 229, 255, 0.2);
}

.hud-date {
  font-size: 0.925rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 8px;
  letter-spacing: 0.02em;
}

.hud-realms-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(8, 9, 12, 0.6);
  padding: 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  width: 100%;
  justify-content: center;
}

.hud-realm-chip {
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
  cursor: pointer;
  user-select: none;
}

.hud-realm-chip.active {
  background: rgba(0, 229, 255, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.35);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.15);
}

.hud-footer-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.hud-metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.hud-metric-val {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.hud-metric-lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* 3. About the Product (Editorial Layout) */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}

.about-lead-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.about-body-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Metric / Technical Spec Highlights */
.specs-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-subtle);
}

.spec-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.spec-item:hover {
  border-color: rgba(0, 229, 255, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

.spec-value {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.spec-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 4. Core Features (Compact 3x2 Grid) */
.features-compact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.feature-box:hover {
  border-color: rgba(0, 229, 255, 0.35);
  background: var(--bg-surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35), 0 0 16px rgba(0, 229, 255, 0.08);
}

.feature-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  display: grid;
  place-items: center;
  color: var(--accent-cyan);
}

.feature-icon-wrap svg {
  width: 18px;
  height: 18px;
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* 5. How It Works (3 Connected Steps) */
.steps-timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
}

.steps-timeline::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 15%;
  right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-medium) 20%, var(--border-medium) 80%, transparent);
  z-index: 0;
}

.step-card {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-index-pill {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.step-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.step-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 6. FAQ (Minimal Functional Accordion) */
.faq-list {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-medium);
}

.faq-item.active {
  border-color: var(--border-accent);
}

.faq-trigger {
  width: 100%;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform var(--transition-base), color var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-cyan);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s cubic-bezier(0.16, 1, 0.3, 1), padding 0.28s ease;
  padding: 0 1.5rem;
}

.faq-item.active .faq-content {
  max-height: 240px;
  padding: 0 1.5rem 1.25rem 1.5rem;
}

.faq-answer {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.65;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.85rem;
}

/* 7. Final CTA Section */
.cta-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: clamp(3rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 3.5rem);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.cta-title {
  font-size: clamp(2rem, 3.8vw, 2.75rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.cta-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 0.5rem;
}

.cta-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* 8. Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2.5rem 0;
  margin-top: 4rem;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.back-to-top:hover {
  color: var(--accent-cyan);
}