:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #1a1a26;
  --fg: #e8e8ef;
  --fg-muted: #8888a0;
  --fg-dim: #555570;
  --accent: #4ade80;
  --accent-dim: #22c55e;
  --accent-glow: rgba(74, 222, 128, 0.15);
  --border: #2a2a3a;
  --radius: 12px;
  --radius-sm: 8px;
}

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

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

h1, h2, h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* === HERO === */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  position: relative;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(74, 222, 128, 0.08) 0%, transparent 60%),
    var(--bg);
}

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

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 32px;
  background: var(--accent-glow);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  margin-bottom: 24px;
  color: #fff;
}

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

.lede {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

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

.stat-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-dim);
  max-width: 160px;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}

/* === PROBLEM === */
.problem {
  padding: 100px 24px;
  background: var(--bg-elevated);
}

.problem-inner {
  max-width: 960px;
  margin: 0 auto;
}

.problem h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: #fff;
  margin-bottom: 16px;
}

.problem-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 640px;
  margin-bottom: 56px;
  line-height: 1.7;
}

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

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.problem-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 10px;
}

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

/* === FEATURES === */
.features {
  padding: 100px 24px;
  background: var(--bg);
}

.features-inner {
  max-width: 960px;
  margin: 0 auto;
}

.features-header {
  margin-bottom: 56px;
}

.features-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: #fff;
  margin-bottom: 16px;
}

.features-header p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: border-color 0.2s;
}

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

.feature-large {
  grid-column: 1 / -1;
  background:
    linear-gradient(135deg, rgba(74, 222, 128, 0.05) 0%, transparent 60%),
    var(--bg-elevated);
}

.feature-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-glow);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 10px;
}

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

/* === HOW === */
.how {
  padding: 100px 24px;
  background: var(--bg-elevated);
}

.how-inner {
  max-width: 800px;
  margin: 0 auto;
}

.how h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: #fff;
  margin-bottom: 56px;
}

.how-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.how-item {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
}

.how-item:first-child {
  border-top: 1px solid var(--border);
}

.how-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  min-width: 80px;
  opacity: 0.6;
}

.how-content h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 8px;
}

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

/* === CLOSING === */
.closing {
  padding: 120px 24px;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 50% at 50% 100%, rgba(74, 222, 128, 0.06) 0%, transparent 60%),
    var(--bg);
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  color: #fff;
  margin-bottom: 20px;
}

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

.closing-vision {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--accent);
  padding: 24px 32px;
  border: 1px solid rgba(74, 222, 128, 0.25);
  border-radius: var(--radius);
  background: var(--accent-glow);
  font-style: italic;
}

/* === FOOTER === */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

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

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

  .features-grid {
    grid-template-columns: 1fr;
  }

  .feature-large {
    grid-column: 1;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  .stat-divider {
    width: 48px;
    height: 1px;
  }

  .how-item {
    flex-direction: column;
    gap: 12px;
  }

  .how-number {
    font-size: 2rem;
    min-width: auto;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

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

@media (max-width: 480px) {
  .hero {
    padding: 60px 16px;
    min-height: 80vh;
  }

  .problem,
  .features,
  .how,
  .closing {
    padding: 64px 16px;
  }

  .problem-card,
  .feature-card {
    padding: 24px 20px;
  }
}