/* ============================================
   AURUM Intelligence — Main Stylesheet
   ============================================ */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #1c2128;
  --bg-card: #21262d;
  --gold: #f0b429;
  --gold-light: #f7d070;
  --gold-dark: #c99a2e;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --border: #30363d;
  --success: #3fb950;
  --danger: #f85149;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--gold);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--gold-light);
}

img {
  max-width: 100%;
  display: block;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

.text-gold { color: var(--gold); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-center { text-align: center; }

.mono { font-family: var(--font-mono); }

/* ============================================
   Layout
   ============================================ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-top: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(13, 17, 23, 0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: var(--gold);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--bg-primary);
  font-size: 0.875rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* Mobile menu */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gold);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: var(--gold-light);
  color: var(--bg-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(240, 180, 41, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1rem;
  border-radius: 10px;
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.8rem;
}

/* ============================================
   Hero
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(240, 180, 41, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(240, 180, 41, 0.1);
  border: 1px solid rgba(240, 180, 41, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--gold);
  margin-bottom: 2rem;
  font-weight: 500;
}

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

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 4rem;
}

.hero-metrics {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-top: 2rem;
}

.hero-metric {
  text-align: center;
}

.hero-metric .value {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--gold);
}

.hero-metric .label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: all var(--transition);
}

.card:hover {
  border-color: rgba(240, 180, 41, 0.3);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(240, 180, 41, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  color: var(--gold);
}

.card h3 {
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ============================================
   Features Section
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ============================================
   Stats Row
   ============================================ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 3rem 0;
}

.stat-item {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.stat-item .stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--gold);
  line-height: 1;
}

.stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* ============================================
   Performance Table
   ============================================ */

.perf-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-secondary);
}

.perf-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.perf-table thead {
  background: var(--bg-tertiary);
}

.perf-table th {
  padding: 1rem 1.25rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

.perf-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.perf-table tbody tr:last-child td {
  border-bottom: none;
}

.perf-table tbody tr:hover {
  background: rgba(240, 180, 41, 0.03);
}

.perf-positive { color: var(--success); }
.perf-negative { color: var(--danger); }

/* ============================================
   Pricing
   ============================================ */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: start;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  position: relative;
  transition: all var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  border-color: var(--gold);
  box-shadow: 0 0 40px rgba(240, 180, 41, 0.1);
}

.pricing-card.featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gold);
  color: var(--bg-primary);
  padding: 0.25rem 1rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card .tier-name {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pricing-card .tier-price {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.pricing-card .tier-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.pricing-card .tier-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing-features li::before {
  content: '\2713';
  color: var(--gold);
  font-weight: 700;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* ============================================
   Equity Curve Chart
   ============================================ */

.chart-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-top: 2rem;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.chart-header h3 {
  font-size: 1rem;
}

.chart-filters {
  display: flex;
  gap: 0.5rem;
}

.chart-filter-btn {
  padding: 0.35rem 0.75rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition);
}

.chart-filter-btn:hover,
.chart-filter-btn.active {
  border-color: var(--gold);
  color: var(--gold);
}

.chart-canvas-wrapper {
  height: 350px;
  position: relative;
}

/* ============================================
   Disclaimer
   ============================================ */

.disclaimer {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 3rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.disclaimer strong {
  color: var(--text-secondary);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================
   Animations
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
    gap: 0.5rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    padding: 0.5rem 0;
  }

  .nav-toggle {
    display: block;
  }

  .hero-metrics {
    flex-direction: column;
    gap: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .features-grid,
  .pricing-grid,
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .stats-row,
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .section {
    padding: 4rem 0;
  }
}

@media (max-width: 480px) {
  .stats-row,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-metric .value {
    font-size: 1.5rem;
  }
}