:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161f;
  --text-primary: #e8e6e3;
  --text-secondary: #9a9a9a;
  --text-muted: #6b6b6b;
  --accent: #e8a838;
  --accent-dim: rgba(232, 168, 56, 0.15);
  --accent-glow: rgba(232, 168, 56, 0.08);
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-inner {
  max-width: 800px;
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--accent);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 32px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero h1 .highlight {
  color: var(--accent);
  font-style: italic;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

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

.problem-inner {
  max-width: 900px;
  margin: 0 auto;
}

.problem-label,
.approach-label,
.modules-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}

.problem h2,
.approach h2,
.modules h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 48px;
}

.problem-grid {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 48px;
}

.problem-card {
  flex: 1;
  padding: 36px 28px;
  border-radius: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.problem-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.problem-divider span {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.problem-statement {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent);
  text-align: center;
}

/* ============ APPROACH ============ */
.approach {
  padding: 100px 24px;
}

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

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

.pillar {
  padding: 40px 28px;
  border-radius: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  transition: border-color 0.3s;
}

.pillar:hover {
  border-color: rgba(232, 168, 56, 0.25);
}

.pillar-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent-dim);
  line-height: 1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--accent), rgba(232, 168, 56, 0.3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.pillar p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* ============ MODULES ============ */
.modules {
  padding: 100px 24px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.modules-inner {
  max-width: 800px;
  margin: 0 auto;
}

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

.module-item {
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
}

.module-item:last-child {
  border-bottom: none;
}

.module-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 12px;
  padding: 4px 10px;
  background: var(--accent-dim);
  border-radius: 4px;
}

.module-item h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.module-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 640px;
}

/* ============ CLOSING ============ */
.closing {
  padding: 120px 24px;
  text-align: center;
  position: relative;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

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

.closing-sub em {
  color: var(--accent);
  font-style: italic;
}

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

.footer-inner {
  max-width: 800px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

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

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .problem-grid {
    flex-direction: column;
  }
  
  .problem-divider {
    padding: 8px 0;
  }
  
  .approach-pillars {
    grid-template-columns: 1fr;
  }
  
  .hero {
    min-height: 80vh;
    padding: 100px 20px 60px;
  }
  
  .problem,
  .approach,
  .modules {
    padding: 72px 20px;
  }
  
  .closing {
    padding: 80px 20px;
  }
}