:root {
  --bg: #0a0e17;
  --bg-surface: #111827;
  --bg-card: #1a2235;
  --fg: #f1f5f9;
  --fg-muted: #94a3b8;
  --accent: #22d3ee;
  --accent-glow: rgba(34, 211, 238, 0.15);
  --accent-secondary: #a78bfa;
  --border: rgba(148, 163, 184, 0.1);
  --radius: 16px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
}

/* Hero */
.hero {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 80px 24px 60px;
  position: relative;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-glow) 0%, transparent 60%);
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(34, 211, 238, 0.3);
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--fg) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 580px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* Features */
.features {
  padding: 100px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.features-header {
  text-align: center;
  margin-bottom: 64px;
}

.features-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 12px;
}

.features-sub {
  color: var(--fg-muted);
  font-size: 1.1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--fg);
}

.feature-card p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* How Section */
.how {
  padding: 100px 24px;
  background: var(--bg-surface);
}

.how-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.how-content h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.how-description {
  color: var(--fg-muted);
  font-size: 1.1rem;
  margin-bottom: 48px;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  text-align: left;
}

.comparison-item {
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.comparison-item.old {
  background: rgba(239, 68, 68, 0.05);
  border-color: rgba(239, 68, 68, 0.2);
}

.comparison-item.new {
  background: var(--accent-glow);
  border-color: rgba(34, 211, 238, 0.3);
}

.comparison-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.comparison-item.old .comparison-label {
  color: #ef4444;
}

.comparison-item.new .comparison-label {
  color: var(--accent);
}

.comparison-item ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.comparison-item ul li {
  color: var(--fg-muted);
  font-size: 0.95rem;
  padding-left: 20px;
  position: relative;
}

.comparison-item.old ul li::before {
  content: '\2715';
  position: absolute;
  left: 0;
  color: #ef4444;
}

.comparison-item.new ul li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Closing */
.closing {
  padding: 120px 24px;
  text-align: center;
  position: relative;
  background: radial-gradient(ellipse at 50% 100%, rgba(167, 139, 250, 0.08) 0%, transparent 60%);
}

.closing h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  max-width: 700px;
  margin: 0 auto 20px;
}

.closing-text {
  color: var(--fg-muted);
  font-size: 1.1rem;
  max-width: 550px;
  margin: 0 auto;
}

/* Footer */
.footer {
  padding: 32px 24px;
  border-top: 1px solid var(--border);
}

.footer-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
}

.footer-divider {
  width: 1px;
  height: 16px;
  background: var(--border);
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison {
    grid-template-columns: 1fr;
  }
  
  .hero-stats {
    gap: 32px;
  }
  
  .hero {
    min-height: 70vh;
    padding: 60px 20px 40px;
  }
}