/* ==========================================================================
   Aindrak — Sovereign Computational Linguistics for Indian Languages
   Clean, Modern, Responsive Stylesheet (Vanilla CSS, Zero Dependencies)
   ========================================================================== */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #162032;
  --bg-card-hover: #1e2c44;
  --bg-glass: rgba(17, 24, 39, 0.85);
  --border-color: #24324a;
  --border-light: #334460;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-saffron: #f59e0b;
  --accent-saffron-dark: #d97706;
  --accent-blue: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  
  --gradient-brand: linear-gradient(135deg, #f59e0b 0%, #ec4899 50%, #8b5cf6 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  --gradient-card: linear-gradient(180deg, #162032 0%, #111827 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(245, 158, 11, 0.2);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-indic: "Noto Sans Devanagari", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
}

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

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

a:hover {
  color: #7dd3fc;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  display: block;
}

.brand-glyph {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--gradient-brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.2rem;
  font-weight: 900;
  box-shadow: 0 2px 10px rgba(245, 158, 11, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.nav-btn-portal {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-saffron);
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.nav-btn-portal:hover {
  background: rgba(245, 158, 11, 0.22);
  color: #fbbf24;
  border-color: var(--accent-saffron);
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-saffron {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-saffron);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-blue {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge-pending {
  background: rgba(244, 63, 94, 0.12);
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.12) 0%, rgba(99, 102, 241, 0.05) 50%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 20px auto 24px;
  max-width: 980px;
}

.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
}

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

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Feature Grid */
.section {
  padding: 70px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
}

.section-description {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 28px;
}

.card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.25s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-saffron);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.card-icon.blue {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-blue);
  border-color: rgba(56, 189, 248, 0.25);
}

.card-icon.purple {
  background: rgba(139, 92, 246, 0.12);
  color: #a78bfa;
  border-color: rgba(139, 92, 246, 0.25);
}

.card-icon.emerald {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald);
  border-color: rgba(16, 185, 129, 0.25);
}

.card-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.card-link {
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-saffron);
}

.card-link:hover {
  color: #fbbf24;
}

/* Comparison / Problem vs Solution Box */
.comparison-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  margin: 40px 0;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

@media (max-width: 768px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

.comp-col-bad {
  border-left: 3px solid var(--accent-rose);
  padding-left: 20px;
}

.comp-col-good {
  border-left: 3px solid var(--accent-emerald);
  padding-left: 20px;
}

.comp-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.comp-list {
  list-style: none;
}

.comp-list li {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 12px;
  padding-left: 20px;
  position: relative;
}

.comp-list.bad li::before {
  content: "✕";
  color: var(--accent-rose);
  position: absolute;
  left: 0;
  font-weight: 800;
}

.comp-list.good li::before {
  content: "✓";
  color: var(--accent-emerald);
  position: absolute;
  left: 0;
  font-weight: 800;
}

/* Rigid Glossary Styles */
.glossary-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 36px;
}

.search-bar {
  width: 100%;
  padding: 14px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-bar:focus {
  border-color: var(--accent-saffron);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.filter-pills {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pill:hover, .pill.active {
  background: rgba(245, 158, 11, 0.15);
  border-color: var(--accent-saffron);
  color: var(--text-primary);
}

.glossary-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  transition: all 0.2s ease;
}

.glossary-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

.glossary-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.glossary-term {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-saffron);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.glossary-indic {
  font-family: var(--font-indic);
  font-size: 1.25rem;
  color: #fbbf24;
}

.glossary-cs-mapping {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
}

.glossary-body {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}

@media (max-width: 820px) {
  .glossary-body {
    grid-template-columns: 1fr;
  }
}

.glossary-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.glossary-analogy-box {
  background: rgba(17, 24, 39, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 0.9rem;
}

.analogy-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-saffron);
  font-weight: 700;
  margin-bottom: 6px;
}

.analogy-code {
  font-family: var(--font-mono);
  color: #e2e8f0;
  background: #0b0f19;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-top: 6px;
  font-size: 0.85rem;
  display: block;
  overflow-x: auto;
}

/* Confidential Notice Callout */
.nda-callout {
  background: radial-gradient(circle at 10% 20%, rgba(244, 63, 94, 0.12) 0%, rgba(245, 158, 11, 0.08) 90%);
  border: 1px solid rgba(244, 63, 94, 0.35);
  border-radius: var(--radius-xl);
  padding: 40px;
  margin: 60px 0;
  text-align: center;
}

.nda-callout-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fb7185;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.nda-callout-text {
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 24px;
  font-size: 0.98rem;
}

/* Footer */
.footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 16px;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

/* Mobile responsive menu */
@media (max-width: 860px) {
  .menu-toggle {
    display: block;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
  }
  
  .nav-links.show {
    display: flex;
  }
}