:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --surface-2: #1a1a24;
  --fg: #f0f0f5;
  --fg-muted: #8888a0;
  --accent: #f59e0b;
  --accent-dim: rgba(245, 158, 11, 0.15);
  --border: rgba(255,255,255,0.07);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 { font-family: 'Syne', sans-serif; font-weight: 700; line-height: 1.15; }

/* Nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(12px);
  z-index: 10;
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.nav-badge {
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(245,158,11,0.25);
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Hero */
.hero {
  padding: 100px 48px 80px;
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: 900px; }
.hero-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.label-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-headline {
  font-size: clamp(40px, 5.5vw, 72px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--fg);
}
.hero-headline em {
  font-style: normal;
  color: var(--accent);
}
.hero-lede {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 56px;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
}
.stat {
  padding: 0 40px 0 0;
}
.stat:first-child { padding-left: 0; }
.stat-value {
  display: block;
  font-family: 'Syne', sans-serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.stat-label {
  display: block;
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 4px;
  line-height: 1.4;
}
.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
  margin-right: 40px;
}

/* Eyebrow */
.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 16px;
}

/* How */
.how { padding: 80px 48px; border-bottom: 1px solid var(--border); }
.how-inner { max-width: 900px; }
.how-header { margin-bottom: 56px; }
.how-header h2 { font-size: clamp(28px, 3.5vw, 42px); letter-spacing: -0.02em; }
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.step-num {
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.step h3 {
  font-size: 18px;
  margin-bottom: 10px;
}
.step p { font-size: 14px; color: var(--fg-muted); line-height: 1.65; }

/* Features */
.features { padding: 80px 48px; border-bottom: 1px solid var(--border); }
.features-inner { max-width: 900px; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.feature-card {
  background: var(--surface);
  padding: 32px 28px;
  border: 1px solid var(--border);
}
.feature-icon {
  color: var(--accent);
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.feature-card p { font-size: 13px; color: var(--fg-muted); line-height: 1.6; }

/* Operation */
.operation { padding: 80px 48px; border-bottom: 1px solid var(--border); }
.operation-inner { max-width: 900px; }
.operation-text { margin-bottom: 56px; }
.operation-text h2 {
  font-size: clamp(26px, 3vw, 40px);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.operation-text p { font-size: 15px; color: var(--fg-muted); line-height: 1.75; margin-bottom: 16px; }
.operation-contrast { display: flex; gap: 32px; }
.contrast-item {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 28px;
}
.contrast-label {
  display: block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 16px;
}
.contrast-old .contrast-label { color: #666; }
.contrast-new .contrast-label { color: var(--accent); }
.contrast-steps {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  font-weight: 600;
}
.contrast-steps .arrow { color: var(--fg-muted); font-weight: 400; }
.contrast-note { font-size: 12px; color: var(--fg-muted); }

/* Closing */
.closing { padding: 100px 48px; }
.closing-inner { max-width: 700px; }
.closing h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 24px;
}
.closing p {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.75;
  max-width: 560px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
  text-align: center;
  font-size: 13px;
  color: var(--fg-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 60px 24px 56px; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .stat-divider { display: none; }
  .steps { grid-template-columns: 1fr; gap: 28px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .operation-contrast { flex-direction: column; }
  .how, .features, .operation { padding: 56px 24px; }
  .closing { padding: 64px 24px; }
}
@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr; }
  .hero-headline { font-size: 36px; }
}