:root {
  --bg-primary: #0a0e14;
  --bg-secondary: #111820;
  --bg-card: #151c26;
  --text-primary: #e8ecf1;
  --text-secondary: #8b95a5;
  --text-muted: #5a6577;
  --accent-green: #00e676;
  --accent-green-dim: #00e67633;
  --accent-amber: #ffc107;
  --accent-red: #ff5252;
  --border: #1e2836;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---- HERO ---- */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 40px 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 800px 600px at 20% 30%, var(--accent-green-dim), transparent),
    radial-gradient(ellipse 600px 400px at 80% 70%, rgba(255, 193, 7, 0.06), transparent);
  pointer-events: none;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-green);
  margin-bottom: 32px;
  letter-spacing: 0.5px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
  max-width: 800px;
}

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

.hero .lede {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat .value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.hero-stat .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 4px;
}

/* ---- SIGNAL STRIP ---- */
.signal-strip {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  padding: 32px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.signal-light {
  width: 16px;
  height: 16px;
  border-radius: 50%;
}

.signal-light.red { background: var(--accent-red); box-shadow: 0 0 20px var(--accent-red); }
.signal-light.amber { background: var(--accent-amber); box-shadow: 0 0 20px var(--accent-amber); }
.signal-light.green { background: var(--accent-green); box-shadow: 0 0 20px var(--accent-green); }

.signal-strip-text {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ---- CURRICULUM ---- */
.curriculum {
  padding: 100px 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-green);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
  max-width: 600px;
}

.track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.track-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: border-color 0.3s, transform 0.3s;
}

.track-card:hover {
  border-color: var(--accent-green);
  transform: translateY(-2px);
}

.track-card .track-number {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-green);
  margin-bottom: 16px;
}

.track-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.track-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

.track-card .track-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.track-card .track-topics span {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}

/* ---- CREDIBILITY ---- */
.credibility {
  padding: 100px 40px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.credibility-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.credibility-text .section-title {
  margin-bottom: 24px;
}

.credibility-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.credibility-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.metric-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
}

.metric-block .metric-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1.2;
}

.metric-block .metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---- COMPARISON ---- */
.comparison {
  padding: 100px 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 48px;
  font-size: 0.95rem;
}

.comparison-table th {
  font-family: var(--font-display);
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  border-bottom: 2px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.comparison-table th:last-child {
  color: var(--accent-green);
}

.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.comparison-table td:last-child {
  color: var(--text-primary);
  font-weight: 500;
}

.comparison-table tbody tr:hover td {
  background: var(--bg-card);
}

/* ---- CLOSING ---- */
.closing {
  padding: 120px 40px;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse 900px 500px at 50% 50%, var(--accent-green-dim), transparent);
  pointer-events: none;
}

.closing-inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

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

/* ---- FOOTER ---- */
.footer {
  padding: 40px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer p {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero {
    padding: 80px 24px 60px;
    min-height: auto;
  }

  .hero-stats {
    gap: 32px;
  }

  .credibility-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .comparison-table {
    font-size: 0.85rem;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 12px 14px;
  }

  .curriculum,
  .comparison {
    padding: 64px 24px;
  }

  .closing {
    padding: 80px 24px;
  }

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

  .signal-strip {
    gap: 12px;
  }

  .signal-strip-text {
    font-size: 11px;
    letter-spacing: 1px;
  }
}