:root {
  --bg-primary: #0a0c10;
  --bg-secondary: #12151c;
  --bg-card: #181c26;
  --bg-card-hover: #1e2330;
  --text-primary: #e8e9ed;
  --text-secondary: #8b8f9a;
  --text-dim: #5a5e6b;
  --accent: #d4a039;
  --accent-bright: #f0b840;
  --accent-dim: #8a6a25;
  --border: #252a36;
  --border-light: #2e3444;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
}

* {
  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-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  background: rgba(10, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-icon {
  color: var(--accent);
  font-size: 1.3rem;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.nav-tagline {
  color: var(--text-dim);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* HERO */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 6rem;
  overflow: hidden;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212, 160, 57, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 160, 57, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(212, 160, 57, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1px solid var(--accent-dim);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 900px;
}

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

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.8;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-bright);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

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

/* PROBLEM */
.problem {
  padding: 8rem 2rem;
  border-top: 1px solid var(--border);
}

.problem-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.2rem;
}

.problem h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
  max-width: 700px;
}

.problem h2 em {
  font-style: normal;
  color: var(--accent);
}

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

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: border-color 0.3s, background 0.3s;
}

.problem-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
}

.problem-number {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-dim);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.problem-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* MODULES */
.modules {
  padding: 8rem 2rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.modules-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.modules h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.module-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: border-color 0.3s, transform 0.2s;
}

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

.module-featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(212, 160, 57, 0.04) 100%);
  border-color: var(--accent-dim);
}

.module-icon {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.module-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.module-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* AI LAYER */
.ai-layer {
  padding: 8rem 2rem;
  border-bottom: 1px solid var(--border);
}

.ai-layer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.ai-layer h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.8rem;
}

.ai-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 3rem;
  line-height: 1.8;
}

.ai-examples {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.ai-question {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 400;
  transition: border-color 0.3s;
}

.ai-question:hover {
  border-color: var(--accent-dim);
}

.q-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(212, 160, 57, 0.12);
  color: var(--accent);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.ai-capabilities {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.ai-cap {
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--accent-dim);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* CLOSING */
.closing {
  padding: 10rem 2rem;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(212, 160, 57, 0.03) 50%, var(--bg-primary) 100%);
}

.closing-inner {
  max-width: 750px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.closing-accent {
  color: var(--accent-bright);
}

.closing p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer .logo-text {
  font-size: 1rem;
}

.footer-tagline {
  font-size: 0.78rem;
  color: var(--text-dim);
  max-width: 400px;
}

.footer-location {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav {
    padding: 1rem 1.25rem;
  }

  .nav-tagline {
    display: none;
  }

  .hero {
    padding: 7rem 1.25rem 4rem;
    min-height: auto;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .stat-divider {
    display: none;
  }

  .problem,
  .modules,
  .ai-layer {
    padding: 5rem 1.25rem;
  }

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

  .module-featured {
    grid-column: 1;
  }

  .closing {
    padding: 6rem 1.25rem;
  }

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