:root {
  --bg: #07090f;
  --bg-elevated: #0e1219;
  --bg-card: #141920;
  --bg-card-hover: #1a2029;
  --fg: #e8eaf0;
  --fg-muted: #8891a4;
  --fg-dim: #5a6478;
  --accent: #22d48f;
  --accent-dim: rgba(34, 212, 143, 0.12);
  --accent-glow: rgba(34, 212, 143, 0.25);
  --border: rgba(255, 255, 255, 0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --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);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---- HERO ---- */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 60px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 50% at 30% 20%, rgba(34, 212, 143, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 70%, rgba(34, 140, 212, 0.04) 0%, transparent 70%),
    var(--bg);
}

.hero-inner {
  max-width: 820px;
  text-align: left;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(34, 212, 143, 0.18);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.6rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
  color: var(--fg);
}

.hero h1 .accent {
  color: var(--accent);
}

.lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.platform-tag {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 100px;
  transition: border-color 0.2s;
}

.platform-tag:hover {
  border-color: var(--accent);
  color: var(--fg);
}

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

.problem-inner {
  max-width: 1040px;
  margin: 0 auto;
}

.problem-label,
.pillars-label,
.how-label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  max-width: 700px;
  margin-bottom: 48px;
  color: var(--fg);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color 0.2s;
}

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

.problem-num {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

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

/* ---- PILLARS ---- */
.pillars {
  padding: 100px 24px;
}

.pillars-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.pillar-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, border-color 0.2s;
}

.pillar-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.1);
}

.pillar-featured {
  border-color: rgba(34, 212, 143, 0.25);
  background: linear-gradient(180deg, rgba(34, 212, 143, 0.04) 0%, var(--bg-card) 40%);
}

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

.pillar-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--fg);
}

.pillar-platform {
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.pillar-card > p:not(.pillar-platform) {
  font-size: 0.93rem;
  color: var(--fg-muted);
  line-height: 1.65;
  flex: 1;
}

.pillar-stat {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
}

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

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

.how-inner {
  max-width: 720px;
  margin: 0 auto;
}

.how-steps {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.how-step {
  display: flex;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

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

.step-marker {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.93rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* ---- CLOSING ---- */
.closing {
  padding: 120px 24px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 50% 60%, rgba(34, 212, 143, 0.05) 0%, transparent 70%),
    var(--bg);
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--fg);
}

.closing-text {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}

/* ---- FOOTER ---- */
.site-footer {
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

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

.footer-sep {
  color: var(--fg-dim);
}

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

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 60px 20px 50px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

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

  .pillar-cards {
    grid-template-columns: 1fr;
  }

  .how-step {
    flex-direction: column;
    gap: 12px;
  }

  .problem,
  .pillars,
  .how {
    padding: 60px 20px;
  }

  .closing {
    padding: 80px 20px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-platforms {
    gap: 8px;
  }

  .platform-tag {
    font-size: 13px;
    padding: 6px 14px;
  }
}