:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: #16161f;
  --fg: #e8e8ed;
  --fg-muted: #8888a0;
  --fg-dim: #55556a;
  --accent: #00d4aa;
  --accent-glow: rgba(0, 212, 170, 0.15);
  --accent-secondary: #00b4d8;
  --gradient: linear-gradient(135deg, #00d4aa, #00b4d8);
  --gradient-text: linear-gradient(135deg, #00d4aa 0%, #00b4d8 50%, #7b68ee 100%);
  --border: rgba(255,255,255,0.06);
  --radius: 16px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* ═══ HERO ═══ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 2rem 4rem;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -200px;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0,212,170,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.nav {
  position: absolute;
  top: 2rem;
  left: 2rem;
  right: 2rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.02em;
}

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

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-tag {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 620px;
  line-height: 1.7;
  font-weight: 300;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 800px;
  margin: 4rem auto 0;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.metric-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.metric-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.4;
}

/* ═══ PILLARS ═══ */
.pillars {
  padding: 8rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 4rem;
}

.section-tag {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  transition: border-color 0.3s ease, transform 0.3s ease;
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.pillar-card:hover {
  border-color: rgba(0,212,170,0.2);
  transform: translateY(-2px);
}

.pillar-card:hover::before {
  opacity: 1;
}

.pillar-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.pillar-icon svg {
  width: 100%;
  height: 100%;
}

.pillar-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.pillar-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.65;
  font-weight: 300;
}

/* ═══ HOW ═══ */
.how {
  padding: 8rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}

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

.step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  padding: 2rem 0;
}

.step-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--fg-dim);
  line-height: 1;
  min-width: 80px;
  opacity: 0.4;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.step-content p {
  color: var(--fg-muted);
  font-weight: 300;
  line-height: 1.65;
}

.step-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  margin-left: 40px;
  opacity: 0.3;
}

/* ═══ CLOSING ═══ */
.closing {
  position: relative;
  padding: 10rem 2rem;
  text-align: center;
  overflow: hidden;
}

.closing-glow {
  position: absolute;
  bottom: -300px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(0,212,170,0.06) 0%, transparent 70%);
  pointer-events: none;
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.closing p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.7;
  font-weight: 300;
}

/* ═══ FOOTER ═══ */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
}

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

.footer-brand p {
  color: var(--fg-dim);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

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

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
  .hero {
    padding: 6rem 1.5rem 3rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 3rem;
  }

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

  .pillar-card {
    padding: 2rem;
  }

  .step {
    flex-direction: column;
    gap: 0.75rem;
  }

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

  .step-line {
    margin-left: 0;
    width: 40px;
    height: 1px;
    background: linear-gradient(to right, var(--accent), transparent);
  }

  .pillars, .how {
    padding: 5rem 1.5rem;
  }

  .closing {
    padding: 6rem 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .section-header h2, .closing h2 {
    font-size: 1.5rem;
  }
}