html {
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  background: var(--color-bg);
}

/* Navigation */
.nav-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 243, 238, 0.96);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.nav-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0.9rem clamp(1.2rem, 4vw, 2.8rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.brand-gem {
  width: 18px;
  height: 18px;
  flex: none;
  border-radius: 50% 50% 50% 2px;
  background: var(--color-primary);
  transform: rotate(-45deg);
}

.brand-gem::after {
  content: "";
  display: block;
  width: 5px;
  height: 5px;
  margin: 6px;
  border-radius: 50%;
  background: var(--color-highlight);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: #fffdf9;
  font-size: 0.84rem;
  font-weight: 600;
}

.nav-cta:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

/* Hero */
.hero-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 7rem) clamp(1.2rem, 4vw, 2.8rem) 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

.hero-title {
  max-width: 12ch;
  margin: 0 0 1.2rem;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.075em;
}

.gradient-text {
  color: var(--color-primary);
}

.hero-desc {
  max-width: 55ch;
  margin-bottom: 1.8rem;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.btn-hero-primary,
.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
}

.btn-hero-primary {
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.btn-hero-primary:hover {
  border-color: #c94835;
  background: #c94835;
  color: #fff;
}

.btn-hero-secondary {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
}

.btn-hero-secondary:hover {
  border-color: var(--color-secondary);
  background: var(--color-secondary-tint);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--color-border);
}

.stat-item {
  min-height: 4rem;
  padding-right: 0.8rem;
}

.stat-item + .stat-item {
  padding-left: 0.8rem;
  border-left: 1px solid var(--color-border);
}

.stat-num {
  display: block;
  color: var(--color-secondary);
  font-size: 1.35rem;
  font-weight: 700;
}

.stat-label {
  display: block;
  margin-top: 0.2rem;
  color: var(--color-text-muted);
  font-size: 0.72rem;
  line-height: 1.35;
}

/* Live layer demo */
.hero-simulation-box {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-raised);
  box-shadow: 0 8px 0 rgba(23, 42, 58, 0.05);
}

.sim-header,
.sim-controls,
.sim-explanation {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.sim-title {
  color: var(--color-text);
  font-size: 0.82rem;
  font-weight: 600;
}

.sim-badge {
  margin-left: auto;
  padding: 0.25rem 0.45rem;
  border-radius: 4px;
  background: var(--color-secondary-tint);
  color: var(--color-secondary);
  font-size: 0.7rem;
}

.sim-controls {
  overflow-x: auto;
  gap: 0.45rem;
}

.sim-tab-btn {
  flex: 1 0 auto;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: transparent;
  color: var(--color-text-muted);
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  white-space: nowrap;
}

.sim-tab-btn:hover,
.sim-tab-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary-tint);
  color: var(--color-primary);
}

.sim-stage {
  min-height: 285px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.4rem;
  background: #f0ede7;
}

.sim-card {
  width: min(100%, 350px);
}

.sim-stage.state-html .sim-card {
  padding: 1rem;
  border: 2px solid #111;
  background: #fff;
  color: #111;
  font-family: Georgia, serif;
}

.sim-stage.state-html .sim-card * {
  color: #111 !important;
  font-family: inherit;
}

.sim-stage.state-html .card-title {
  margin: 0.5rem 0;
  font-size: 1.25rem;
}

.sim-stage.state-html .card-desc {
  margin-bottom: 0.8rem;
}

.sim-stage.state-html .card-btn,
.sim-stage.state-html .card-like-btn {
  padding: 2px 6px;
  border: 2px outset #777;
  border-radius: 0;
  background: #e9e9ed;
  color: #111;
}

.sim-stage.state-css .sim-card,
.sim-stage.state-js .sim-card {
  padding: 1.35rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-raised);
  box-shadow: 0 8px 0 rgba(23, 42, 58, 0.06);
}

.card-tag {
  display: inline-block;
  margin-bottom: 0.7rem;
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  background: var(--color-secondary-tint);
  color: var(--color-secondary);
  font-size: 0.7rem;
}

.card-title {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.card-desc {
  margin-bottom: 1.1rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  line-height: 1.55;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--color-border);
}

.card-btn {
  padding: 0.45rem 0.7rem;
  border: 0;
  border-radius: 4px;
  background: var(--color-secondary);
  color: #fff;
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}

.card-like-btn {
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: transparent;
  color: var(--color-text-muted);
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
}

.card-like-btn:hover,
.card-like-btn.liked {
  border-color: #d9485f;
  background: #fbe4e8;
  color: #b52e46;
}

.sim-explanation {
  justify-content: space-between;
  border-top: 1px solid var(--color-border);
  border-bottom: 0;
  color: var(--color-text-muted);
  font-size: 0.72rem;
}

.sim-layer-indicator {
  color: var(--color-secondary);
  white-space: nowrap;
}

/* Component preview and CTA */
.section-wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: clamp(3.5rem, 7vw, 6rem) clamp(1.2rem, 4vw, 2.8rem);
}

.section-head {
  max-width: 740px;
  margin-bottom: 2rem;
}

.section-tag {
  display: inline-block;
  margin-bottom: 0.65rem;
  color: var(--color-secondary);
  font-size: 0.78rem;
  font-weight: 600;
}

.section-title {
  margin-bottom: 0.8rem;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.06em;
}

.section-sub {
  max-width: 62ch;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.components-preview-wrapper {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-raised);
  box-shadow: 0 5px 0 rgba(23, 42, 58, 0.04);
}

.comp-preview-tabs {
  display: flex;
  gap: 0.45rem;
  padding: 0.8rem 1rem;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.comp-filter-tab {
  padding: 0.45rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--color-text-muted);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
}

.comp-filter-tab:hover,
.comp-filter-tab.active {
  border-color: var(--color-primary);
  background: var(--color-primary-tint);
  color: var(--color-primary);
}

.comp-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  padding: 1.3rem;
}

.comp-showcase-item {
  position: relative;
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.6rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.comp-item-label {
  position: absolute;
  top: 0.65rem;
  left: 0.75rem;
  color: var(--color-text-muted);
  font-size: 0.7rem;
}

.comp-preview-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 1.3rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.84rem;
}

.cta-banner {
  padding: clamp(2.2rem, 6vw, 4rem) clamp(1.4rem, 5vw, 3.2rem);
  border: 1px solid var(--color-text);
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: #fffdf9;
  text-align: center;
  box-shadow: 0 5px 0 rgba(23, 42, 58, 0.14);
}

.cta-content {
  max-width: 650px;
  margin: 0 auto;
}

.cta-title {
  margin-bottom: 0.8rem;
  color: #fffdf9;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.06em;
}

.cta-text {
  margin-bottom: 1.6rem;
  color: rgba(255, 253, 249, 0.78);
  line-height: 1.65;
}

.cta-actions {
  justify-content: center;
}

.cta-banner .btn-hero-secondary {
  border-color: rgba(255, 253, 249, 0.4);
  color: #fffdf9;
}

/* Footer */
.site-footer {
  padding: 2.2rem clamp(1.2rem, 4vw, 2.8rem);
  border-top: 1px solid #1d3443;
  background: #1d3443;
}

.footer-notice {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem 1.2rem;
  border: 1px solid rgba(255, 253, 249, 0.24);
  border-radius: var(--radius-sm);
  color: rgba(255, 253, 249, 0.82);
  text-align: center;
  font-size: 0.88rem;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-simulation-box {
    max-width: 680px;
  }

  .nav-links {
    display: none;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 1rem;
  }

  .stat-item:nth-child(3) {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
  }

  .stat-item:nth-child(4) {
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
  }
}

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

  .stat-item + .stat-item {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--color-border);
    padding-top: 0.9rem;
  }

  .sim-header,
  .sim-explanation,
  .card-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .sim-badge {
    margin-left: 0;
  }

  .comp-preview-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}