:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-elevated: #1a1a26;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --accent: #00e676;
  --accent-dim: rgba(0, 230, 118, 0.12);
  --accent-glow: rgba(0, 230, 118, 0.25);
  --red: #ff4d6a;
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-w: 1100px;
  --px: 24px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ===== HERO ===== */
.hero {
  padding: 100px var(--px) 80px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 28px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero h1 .highlight {
  color: var(--red);
  text-decoration: underline;
  text-decoration-color: rgba(255, 77, 106, 0.3);
  text-underline-offset: 4px;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 520px;
  line-height: 1.7;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px 36px;
  text-align: center;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 60px var(--accent-glow);
}

.stat-label {
  font-size: 1rem;
  color: var(--fg-muted);
  margin-top: 12px;
}

.stat-divider {
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin: 20px auto;
  opacity: 0.4;
}

.stat-note {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
}

/* ===== PROBLEM ===== */
.problem {
  padding: 100px var(--px);
  border-top: 1px solid var(--border);
}

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

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 56px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 28px;
}

.problem-icon {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--red);
  margin-bottom: 20px;
  opacity: 0.7;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

/* ===== HOW IT WORKS ===== */
.how {
  padding: 100px var(--px);
  border-top: 1px solid var(--border);
}

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

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}

.how-sub {
  color: var(--fg-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 56px;
}

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

.pipeline-step {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 32px 0;
}

.step-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.pipeline-connector {
  width: 2px;
  height: 28px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  margin-left: 23px;
  opacity: 0.3;
}

/* ===== NICHES ===== */
.niches {
  padding: 100px var(--px);
  border-top: 1px solid var(--border);
}

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

.niches h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 48px;
}

.niche-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-bottom: 40px;
}

.niche-tag {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 12px 24px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--bg-card);
  color: var(--fg);
  transition: all 0.2s;
}

.niche-tag:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.niche-note {
  color: var(--fg-muted);
  font-size: 1rem;
}

/* ===== MATH ===== */
.math {
  padding: 100px var(--px);
  border-top: 1px solid var(--border);
}

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

.math h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 48px;
  text-align: center;
}

.math-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.math-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 20px;
  text-align: center;
}

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

.math-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.math-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--fg);
}

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

.math-note {
  text-align: center;
  color: var(--fg-muted);
  font-size: 1.05rem;
}

/* ===== CLOSING ===== */
.closing {
  padding: 120px var(--px);
  border-top: 1px solid var(--border);
  text-align: center;
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.75;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 48px var(--px);
  border-top: 1px solid var(--border);
}

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

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    padding: 72px var(--px) 60px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .math-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

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

  .stat-number {
    font-size: 3.5rem;
  }
}

@media (max-width: 480px) {
  .math-grid {
    grid-template-columns: 1fr;
  }

  .niche-tags {
    gap: 10px;
  }

  .niche-tag {
    font-size: 0.85rem;
    padding: 10px 18px;
  }
}