header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px var(--section-pad-x);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  transition: background 300ms ease, border-color 300ms ease, backdrop-filter 300ms ease, box-shadow 300ms ease;
}

header.scrolled {
  background: rgba(7, 16, 25, 0.82);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.18);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-accent);
  letter-spacing: 0.03em;
  font-weight: 800;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  color: rgba(211, 240, 255, 0.6);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-size: var(--text-hero);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, #f8fbff 0%, #8fddff 52%, #ffb39a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 10px 40px rgba(83, 208, 255, 0.08);
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  line-height: var(--leading-snug);
}

.hero-value {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: calc(var(--space-xl) + 8px);
}

.scroll-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--color-text-faint);
  font-size: var(--text-small);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
}

.scroll-line {
  width: 40px;
  height: 1px;
  background: var(--color-text-faint);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { transform: scaleX(1); opacity: 0.4; }
  50% { transform: scaleX(1.5); opacity: 1; }
}

.hero-screenshot-card {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 28px 80px rgba(2, 8, 18, 0.55);
  transform: perspective(800px) rotateY(-5deg) rotateX(2deg);
  animation: heroFloat 6s ease-in-out infinite alternate;
  max-width: 420px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(237, 247, 255, 0.92));
}

@keyframes heroFloat {
  from { transform: perspective(800px) rotateY(-5deg) rotateX(2deg) translateY(0); }
  to   { transform: perspective(800px) rotateY(-3deg) rotateX(1deg) translateY(-12px); }
}

.hero-screenshot-label {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(83, 208, 255, 0.2);
  border-radius: 100px;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  color: #2875b8;
}

.pain-card {
  background: linear-gradient(180deg, rgba(17, 31, 45, 0.86), rgba(10, 20, 31, 0.96));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.pain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-highlight), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.pain-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-light);
}

.pain-card:hover::before {
  opacity: 1;
}

.pain-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 800;
  color: rgba(83, 208, 255, 0.14);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.pain-card-title {
  font-size: var(--text-title);
  margin-bottom: var(--space-sm);
}

.pain-card-body {
  font-size: var(--text-body);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.workflow-container {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
  max-width: 960px;
  margin: 0 auto;
}

.workflow-node {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  position: relative;
  min-height: 210px;
  border: 1px solid rgba(143, 175, 202, 0.12);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(15, 26, 39, 0.92), rgba(10, 19, 29, 0.96));
}

.workflow-node:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(50% + 28px);
  right: calc(-50% + 28px);
  height: 2px;
  background: var(--color-border);
  transition: background 0.6s ease;
}

.workflow-node.is-active:not(:last-child)::after {
  background: linear-gradient(90deg, var(--color-accent), var(--color-border));
}

.workflow-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(180deg, rgba(18, 31, 46, 0.96), rgba(12, 24, 37, 0.96));
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.workflow-node.is-active .workflow-icon {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.workflow-name {
  font-size: var(--text-small);
  font-weight: 700;
  color: #F7FBFF;
  margin-bottom: var(--space-xs);
}

.workflow-desc {
  font-size: 0.82rem;
  color: #D5E4F1;
  line-height: 1.75;
}

.tab-bar {
  display: flex;
  border-bottom: 1px solid rgba(144, 183, 214, 0.14);
  margin-bottom: var(--space-xl);
  position: relative;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.tab-btn {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--text-small);
  color: var(--color-text-muted);
  transition: color var(--transition-base), background var(--transition-base);
  position: relative;
  border-radius: 999px;
}

.tab-btn.active {
  color: var(--color-text-primary);
  background: rgba(83, 208, 255, 0.08);
}

.tab-indicator {
  position: absolute;
  bottom: -1px;
  height: 2px;
  background: var(--color-accent);
  transition: left var(--transition-base), width var(--transition-base);
}

.screenshot-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(144, 183, 214, 0.18);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
  max-width: 100%;
}

.screenshot-frame img {
  width: 100%;
  display: block;
  object-fit: cover;
}

.phone-frame {
  max-width: 320px;
  aspect-ratio: 9 / 19;
  margin: 0 auto;
}

.desktop-frame {
  aspect-ratio: 16 / 10;
  max-width: 100%;
}

.feature-card {
  background: linear-gradient(180deg, rgba(17, 31, 45, 0.9), rgba(11, 22, 35, 0.96));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-float);
  border-color: var(--color-border-light);
}

.feature-glyph {
  font-size: 2.3rem;
  margin-bottom: var(--space-lg);
  display: block;
  color: var(--color-accent);
}

.feature-title {
  font-size: var(--text-title);
  margin-bottom: var(--space-sm);
}

.feature-body {
  font-size: var(--text-body);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.narrative-section {
  position: relative;
}

.narrative-title {
  font-size: var(--text-display);
  margin-bottom: var(--space-xl);
}

.narrative-body {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 2;
  max-width: 680px;
}

.narrative-body p + p {
  margin-top: var(--space-lg);
}

.pull-quote {
  margin: var(--space-2xl) 0;
  padding: var(--space-lg) var(--space-xl);
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-subtle);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-style: italic;
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
}

.cta-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  flex: 1;
}

.cta-card.featured {
  border-color: rgba(83, 208, 255, 0.4);
  box-shadow: 0 0 0 1px rgba(83, 208, 255, 0.12), 0 24px 80px rgba(4, 15, 28, 0.36);
}

.cta-card-title {
  font-size: var(--text-title);
  margin-bottom: var(--space-md);
}

.cta-card-desc {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.qr-placeholder {
  width: 160px;
  height: 160px;
  margin: 0 auto var(--space-md);
  border: 2px dashed var(--color-accent);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: var(--text-small);
  font-family: var(--font-mono);
}

footer {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) var(--section-pad-x);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-lg);
  align-items: center;
  margin-bottom: var(--space-xl);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--color-accent);
}

.footer-logo-sub {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  color: var(--color-text-faint);
  margin-top: 4px;
}

.footer-right {
  text-align: right;
  color: var(--color-text-faint);
  font-size: var(--text-micro);
  font-family: var(--font-mono);
}

.footer-tagline {
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 3rem);
  font-style: normal;
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}