:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --fg-primary: #f0f0f5;
  --fg-secondary: #8888a0;
  --fg-muted: #55556a;
  --accent: #4ade80;
  --accent-dim: rgba(74, 222, 128, 0.1);
  --accent-glow: rgba(74, 222, 128, 0.15);
  --border: rgba(255, 255, 255, 0.06);
  --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-primary);
  color: var(--fg-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== HERO ===== */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  background: 
    radial-gradient(ellipse 600px 400px at 50% 30%, rgba(74, 222, 128, 0.06), transparent),
    radial-gradient(ellipse 800px 600px at 30% 60%, rgba(56, 120, 200, 0.04), transparent),
    var(--bg-primary);
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid rgba(74, 222, 128, 0.25);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 32px;
  background: var(--accent-dim);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

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

.lede {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--fg-secondary);
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 24px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

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

.stat-number {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--fg-primary);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

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

.problem-container {
  max-width: 1000px;
  margin: 0 auto;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
}

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

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

.problem-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

.problem-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border-radius: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

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

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

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

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

.features-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.features-sub {
  color: var(--fg-secondary);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto;
}

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

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

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(74, 222, 128, 0.15);
}

.feature-large {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-card), rgba(74, 222, 128, 0.03));
  border-color: rgba(74, 222, 128, 0.12);
}

.feature-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  border-radius: 6px;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

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

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

.how-container {
  max-width: 700px;
  margin: 0 auto;
}

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 56px;
  text-align: center;
}

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

.how-step {
  display: flex;
  gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.how-step:last-child {
  border-bottom: none;
}

.step-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
  min-width: 60px;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

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

/* ===== CLOSING ===== */
.closing {
  padding: 120px 24px;
  background: var(--bg-primary);
  text-align: center;
  position: relative;
  background:
    radial-gradient(ellipse 700px 400px at 50% 50%, rgba(74, 222, 128, 0.05), transparent),
    var(--bg-primary);
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
}

.closing-text {
  color: var(--fg-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.closing-vision {
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid rgba(74, 222, 128, 0.12);
  border-radius: var(--radius);
}

.closing-vision p {
  color: var(--fg-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  font-style: italic;
}

/* ===== FOOTER ===== */
.footer {
  padding: 48px 24px;
  background: var(--bg-secondary);
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-container {
  max-width: 700px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.footer-divider {
  width: 40px;
  height: 1px;
  background: var(--border);
  margin: 0 auto 20px;
}

.footer-copy {
  color: var(--fg-muted);
  font-size: 0.8rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    padding: 80px 20px 60px;
    min-height: 80vh;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 16px;
    padding: 20px 28px;
  }
  
  .stat-divider {
    width: 40px;
    height: 1px;
  }
  
  .problem-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-large {
    grid-column: 1;
  }
  
  .how-step {
    flex-direction: column;
    gap: 12px;
  }
  
  .step-number {
    font-size: 1.5rem;
    min-width: auto;
  }
  
  .problem, .features, .how, .closing {
    padding: 60px 20px;
  }
}