:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #16161f;
  --fg: #e8e6e1;
  --fg-muted: #8a8880;
  --fg-dim: #5a5850;
  --accent: #d4a853;
  --accent-glow: rgba(212, 168, 83, 0.15);
  --accent-subtle: rgba(212, 168, 83, 0.08);
  --border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --max-width: 1140px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  font-size: 22px;
  color: var(--accent);
}

.logo-text {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
}

/* Hero */
.hero {
  padding: 160px 32px 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

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

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--accent);
  border-radius: 100px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  color: var(--fg);
  margin-bottom: 24px;
  max-width: 800px;
}

.hero-sub {
  font-size: 19px;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.stat-num {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  font-size: 14px;
  color: var(--fg-dim);
  margin-top: 4px;
}

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

/* Problem */
.problem {
  padding: 120px 32px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.problem-label,
.features-label,
.how-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 48px;
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.problem-statement h2 {
  font-size: clamp(28px, 4vw, 42px);
  color: var(--fg);
}

.problem-details p {
  color: var(--fg-muted);
  font-size: 17px;
  margin-bottom: 20px;
}

.problem-details p:last-child {
  margin-bottom: 0;
}

/* Features */
.features {
  padding: 120px 32px;
}

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

.features-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  transition: border-color 0.3s ease;
}

.feature-card:hover {
  border-color: rgba(212, 168, 83, 0.25);
}

.feature-card-large {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(160deg, var(--bg-card) 0%, rgba(212, 168, 83, 0.04) 100%);
}

.feature-icon {
  font-size: 28px;
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
  color: var(--fg);
}

.feature-card p {
  color: var(--fg-muted);
  font-size: 16px;
  line-height: 1.65;
}

/* How */
.how {
  padding: 120px 32px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

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

.how-step {
  display: flex;
  align-items: flex-start;
  gap: 48px;
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}

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

.step-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 56px;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.4;
  min-width: 100px;
  letter-spacing: -0.03em;
}

.step-content h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.step-content p {
  color: var(--fg-muted);
  font-size: 17px;
  max-width: 540px;
}

/* Closing */
.closing {
  padding: 140px 32px;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

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

.closing h2 {
  font-size: clamp(32px, 5vw, 52px);
  margin-bottom: 24px;
}

.closing-sub {
  font-size: 19px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* Footer */
.footer {
  padding: 40px 32px;
  border-top: 1px solid var(--border);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.5;
}

.footer-brand .logo-text {
  font-size: 16px;
}

.footer-note {
  font-size: 13px;
  color: var(--fg-dim);
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 120px 20px 80px;
  }

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

  .stat-divider {
    display: none;
  }

  .problem {
    padding: 80px 20px;
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .features {
    padding: 80px 20px;
  }

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

  .feature-card-large {
    grid-row: auto;
  }

  .how {
    padding: 80px 20px;
  }

  .how-step {
    flex-direction: column;
    gap: 16px;
    padding: 32px 0;
  }

  .step-number {
    font-size: 40px;
    min-width: auto;
  }

  .closing {
    padding: 100px 20px;
  }

  .nav-inner {
    padding: 0 20px;
  }

  .footer-inner {
    padding: 0;
    flex-direction: column;
    gap: 12px;
  }
}