:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #1a1a25;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --accent: #00e5a0;
  --accent-dim: rgba(0, 229, 160, 0.12);
  --accent-glow: rgba(0, 229, 160, 0.25);
  --orange: #ff6b35;
  --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; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  color: var(--accent);
  font-size: 1.1rem;
}

.logo-text { letter-spacing: -0.02em; }

.nav-tag {
  font-size: 0.8rem;
  color: var(--fg-muted);
  background: var(--bg-card);
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* Hero */
.hero {
  padding: 160px 24px 80px;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, var(--accent-glow), transparent),
    radial-gradient(ellipse 80% 60% at 20% 20%, rgba(255, 107, 53, 0.06), transparent),
    var(--bg);
}

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

.hero-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 28px 36px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: fit-content;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--fg-muted);
  display: block;
  margin-top: 2px;
}

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

/* Numbers */
.numbers {
  padding: 100px 24px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.numbers-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.numbers-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.numbers-header p {
  color: var(--fg-muted);
  font-size: 1.05rem;
  margin-bottom: 48px;
}

.math-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.math-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 36px;
  min-width: 160px;
}

.math-value {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.math-desc {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 8px;
  line-height: 1.4;
}

.math-operator {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--fg-muted);
}

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

.accent-card .math-value {
  color: var(--accent);
}

/* How It Works */
.how-it-works {
  padding: 100px 24px;
}

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

.how-it-works h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
}

.steps {
  display: grid;
  gap: 48px;
}

.step {
  display: grid;
  grid-template-columns: 60px 1fr;
  grid-template-rows: auto auto;
  column-gap: 24px;
  row-gap: 8px;
}

.step-num {
  grid-row: 1 / -1;
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent-dim);
  line-height: 1;
  padding-top: 4px;
  background: linear-gradient(180deg, var(--accent), rgba(0, 229, 160, 0.2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
}

.step p {
  color: var(--fg-muted);
  font-size: 0.95rem;
  max-width: 500px;
}

/* Niches */
.niches {
  padding: 100px 24px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.niches h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.niches-sub {
  color: var(--fg-muted);
  font-size: 1.05rem;
  margin-bottom: 48px;
}

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

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

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

.niche-icon {
  font-size: 1.6rem;
  margin-bottom: 16px;
  display: block;
}

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

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

/* Closing */
.closing {
  padding: 120px 24px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 40% at 50% 100%, var(--accent-glow), transparent),
    var(--bg);
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.closing-location {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
}

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

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
}

.footer-brand .logo-icon {
  color: var(--accent);
}

.footer-info {
  font-size: 0.82rem;
  color: var(--fg-muted);
}

/* Mobile */
@media (max-width: 640px) {
  .hero { padding: 120px 20px 60px; }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
    padding: 24px;
    width: 100%;
  }

  .stat-divider {
    width: 100%;
    height: 1px;
  }

  .math-flow {
    flex-direction: column;
    gap: 12px;
  }

  .math-card {
    width: 100%;
    min-width: unset;
  }

  .math-operator {
    font-size: 1.2rem;
  }

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

  .step {
    grid-template-columns: 44px 1fr;
  }

  .step-num {
    font-size: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .numbers, .niches, .how-it-works, .closing {
    padding: 72px 20px;
  }
}