:root {
  --bg: #0a0f1a;
  --bg-elevated: #111827;
  --bg-card: #161f33;
  --fg: #e2e8f0;
  --fg-muted: #8892a8;
  --fg-dim: #4a5568;
  --accent: #38bdf8;
  --accent-warm: #f59e0b;
  --accent-green: #34d399;
  --border: #1e293b;
  --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: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  position: relative;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(56, 189, 248, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 80% 80%, rgba(245, 158, 11, 0.04) 0%, transparent 60%);
}

.hero-inner {
  max-width: 780px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 6px 16px;
  border-radius: 4px;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 6px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ============ THESIS ============ */
.thesis {
  padding: 100px 24px;
  border-top: 1px solid var(--border);
}

.thesis-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.thesis-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 28px;
  position: relative;
  transition: border-color 0.2s;
}

.thesis-card:hover {
  border-color: rgba(56, 189, 248, 0.3);
}

.thesis-num {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--fg-dim);
  letter-spacing: 1px;
  display: block;
  margin-bottom: 16px;
}

.thesis-card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.thesis-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 14px;
}

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

/* ============ SECTORS ============ */
.sectors {
  padding: 100px 24px;
  background: var(--bg-elevated);
}

.sectors-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.sectors h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.sectors-sub {
  color: var(--fg-muted);
  font-size: 1.05rem;
  margin-bottom: 56px;
  max-width: 540px;
}

.sectors-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.sector {
  padding: 32px 24px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  transition: transform 0.2s, border-color 0.2s;
}

.sector:hover {
  transform: translateY(-3px);
  border-color: rgba(245, 158, 11, 0.3);
}

.sector-icon {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent-warm);
  background: rgba(245, 158, 11, 0.1);
  display: inline-block;
  padding: 6px 14px;
  border-radius: 6px;
  margin-bottom: 18px;
}

.sector h4 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 10px;
}

.sector p {
  color: var(--fg-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ============ METHOD ============ */
.method {
  padding: 100px 24px;
  border-top: 1px solid var(--border);
}

.method-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: center;
}

.method-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.2;
}

.method-text p {
  color: var(--fg-muted);
  font-size: 1rem;
  margin-bottom: 16px;
  line-height: 1.7;
}

.method-visual {
  display: flex;
  justify-content: center;
}

.method-ring {
  position: relative;
  width: 260px;
  height: 260px;
}

.ring-item {
  position: absolute;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.ring-finance {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent);
  border-color: rgba(56, 189, 248, 0.3);
}

.ring-ops {
  bottom: 20px;
  left: 0;
  color: var(--accent-warm);
  border-color: rgba(245, 158, 11, 0.3);
}

.ring-tech {
  bottom: 20px;
  right: 0;
  color: var(--accent-green);
  border-color: rgba(52, 211, 153, 0.3);
}

.ring-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

/* ============ CLOSING ============ */
.closing {
  padding: 120px 24px;
  text-align: center;
  background:
    radial-gradient(ellipse 50% 60% at 50% 100%, rgba(56, 189, 248, 0.05) 0%, transparent 70%);
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}

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

/* ============ FOOTER ============ */
.site-footer {
  padding: 48px 24px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: 0.5px;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--fg-dim);
}

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

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .thesis-inner {
    grid-template-columns: 1fr;
  }

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

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

  .method-visual {
    order: -1;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

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