:root {
  --bg: #0a0e17;
  --bg-subtle: #111827;
  --fg: #f1f5f9;
  --fg-muted: #94a3b8;
  --accent: #22d3ee;
  --accent-dim: rgba(34, 211, 238, 0.12);
  --accent-glow: rgba(34, 211, 238, 0.25);
  --surface: #1e293b;
  --border: #334155;
  --success: #34d399;
  --radius: 12px;
  --max-width: 1100px;
}

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

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

h1, h2, h3 {
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.2;
}

/* Hero */
.hero {
  padding: 120px 24px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-dim) 0%, transparent 60%);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--fg);
}

.hero h1 .accent {
  color: var(--accent);
}

.lede {
  font-size: 1.2rem;
  color: var(--fg-muted);
  max-width: 650px;
  margin: 0 auto 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.stat {
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.stat-number {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-top: 4px;
}

/* Problem */
.problem {
  padding: 100px 24px;
  background: var(--bg-subtle);
}

.problem-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.problem h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  text-align: center;
  margin-bottom: 60px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.problem-card.active {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--surface) 0%, var(--accent-dim) 100%);
}

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

.problem-card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* Features */
.features {
  padding: 100px 24px;
}

.features-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.features h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  margin-bottom: 60px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.feature-item {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.feature-item:hover {
  border-color: var(--accent);
}

.feature-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.6;
  min-width: 40px;
}

.feature-content h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.feature-content p {
  font-size: 0.95rem;
  color: var(--fg-muted);
}

/* Numbers */
.numbers {
  padding: 100px 24px;
  background: var(--bg-subtle);
}

.numbers-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.numbers h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  margin-bottom: 48px;
}

.numbers-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.number-card {
  padding: 24px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.number-card.highlight {
  border-color: var(--success);
  background: linear-gradient(135deg, var(--surface) 0%, rgba(52, 211, 153, 0.1) 100%);
}

.number-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--fg);
}

.number-card.highlight .number-value {
  color: var(--success);
}

.number-context {
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-top: 4px;
}

.number-operator {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  color: var(--fg-muted);
}

.numbers-note {
  font-size: 0.95rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Closing */
.closing {
  padding: 100px 24px;
  text-align: center;
}

.closing-inner {
  max-width: 750px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  margin-bottom: 20px;
}

.closing > .closing-inner > p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin-bottom: 40px;
}

.closing-vision {
  padding: 32px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
}

.vision-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent);
  font-style: italic;
}

/* Footer */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 4px;
}

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

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 80px 20px 60px;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
    max-width: 300px;
  }
  
  .problem-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-item {
    flex-direction: column;
    gap: 12px;
  }
  
  .numbers-grid {
    flex-direction: column;
  }
  
  .number-card {
    width: 100%;
    max-width: 250px;
  }
}