:root {
  --bg: #0a0f1a;
  --bg-elevated: #121a2e;
  --bg-card: #1a2340;
  --fg: #e8ecf4;
  --fg-muted: #8b99b5;
  --accent: #4fd1c5;
  --accent-glow: rgba(79, 209, 197, 0.15);
  --danger: #f56565;
  --success: #48bb78;
  --radius: 12px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Hero */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  position: relative;
  background: radial-gradient(ellipse at 50% 0%, rgba(79, 209, 197, 0.08) 0%, transparent 60%);
}

.hero-inner {
  max-width: 800px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: var(--accent-glow);
  border: 1px solid rgba(79, 209, 197, 0.3);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-stat {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 20px 32px;
  background: var(--bg-elevated);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--fg-muted);
  text-align: left;
  max-width: 240px;
  line-height: 1.4;
}

/* Problem Section */
.problem {
  padding: 120px 24px;
  background: var(--bg-elevated);
}

.problem-inner {
  max-width: 900px;
  margin: 0 auto;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  margin-bottom: 48px;
  text-align: center;
  letter-spacing: -0.01em;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.problem-card {
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
}

.problem-card.old {
  background: rgba(245, 101, 101, 0.05);
  border-color: rgba(245, 101, 101, 0.2);
}

.problem-card.new {
  background: rgba(79, 209, 197, 0.05);
  border-color: rgba(79, 209, 197, 0.2);
}

.problem-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.problem-card.old .problem-label {
  color: var(--danger);
}

.problem-card.new .problem-label {
  color: var(--accent);
}

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

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

.problem-card.old li::before {
  content: '\00D7';
  position: absolute;
  left: 0;
  color: var(--danger);
  font-weight: 700;
}

.problem-card.new li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* Features */
.features {
  padding: 120px 24px;
}

.features-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.features h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  margin-bottom: 60px;
  text-align: center;
  letter-spacing: -0.01em;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.feature-card {
  padding: 36px;
  background: var(--bg-elevated);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(79, 209, 197, 0.3);
}

.feature-icon {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
  opacity: 0.7;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* Closing */
.closing {
  padding: 120px 24px;
  background: var(--bg-elevated);
  text-align: center;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 600;
  margin-bottom: 24px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin-bottom: 40px;
  line-height: 1.7;
}

.closing-vision {
  padding: 24px 32px;
  background: var(--accent-glow);
  border: 1px solid rgba(79, 209, 197, 0.2);
  border-radius: var(--radius);
}

.closing-vision p {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
}

/* Footer */
.site-footer {
  padding: 60px 24px;
  text-align: center;
}

.footer-inner {
  max-width: 600px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* Responsive */
@media (max-width: 768px) {
  .problem-grid,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 70vh;
    padding: 60px 20px;
  }

  .hero-stat {
    flex-direction: column;
    text-align: center;
  }

  .stat-label {
    text-align: center;
  }

  .problem,
  .features,
  .closing {
    padding: 80px 20px;
  }
}