/* ═══════════════════════════════════════════════════════
   BENI — Bangla Exploration & Native-language Intelligence
   LILA Lab's flagship NLP pipeline
   Aesthetic: Data-driven, editorial, credible
   Palette: Teal #006D77, Gold #E29578, Sand #FFDDD2
   Fonts: Fraunces (display), DM Sans (body)
   ═══════════════════════════════════════════════════════ */

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  overflow-x: hidden;
}
body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #2D3748;
  background: #FFFBF5;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: #006D77; text-decoration: none; transition: color 0.3s ease; }
a:hover { color: #E29578; }
img { max-width: 100%; height: auto; }

/* ── CSS Variables ── */
:root {
  --teal: #006D77;
  --teal-dark: #004E55;
  --teal-deeper: #003A42;
  --teal-light: #0A8A96;
  --gold: #E29578;
  --gold-dark: #D48364;
  --sand: #FFDDD2;
  --sand-light: #FFF5EE;
  --olive: #5A7A6B;
  --terracotta: #C76B4A;
  --charcoal: #2D3748;
  --charcoal-light: #4A5568;
  --cream: #FFFBF5;
  --warm-white: #FFFAF7;
  --paper: #FDF8F3;
  --ink: #1A202C;
  --muted: #718096;
  --light-border: rgba(0,0,0,0.06);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1100px;
}

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  line-height: 1.2;
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.3rem); }

.section-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

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

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 251, 245, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--light-border);
  transition: var(--transition);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo {
  display: flex;
  align-items: baseline;
  gap: 3px;
  text-decoration: none;
}
.nav-logo-mark {
  font-family: 'Fraunces', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--teal);
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}
.nav-logo-sub {
  font-family: 'Fraunces', serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gold);
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--charcoal-light);
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.active { color: var(--teal); }
.nav-links a.nav-gh {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: 1.5px solid var(--light-border);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.8rem;
  transition: all 0.2s;
}
.nav-links a.nav-gh:hover {
  border-color: var(--teal);
  background: rgba(0,109,119,0.04);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--charcoal);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ── */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(165deg, var(--cream) 0%, #fff 40%, var(--sand-light) 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,109,119,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}
.hero-breadcrumb {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hero-breadcrumb a { color: var(--muted); }
.hero-breadcrumb a:hover { color: var(--teal); }
.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 999px;
}
.hero-badge.teal {
  background: rgba(0,109,119,0.1);
  color: var(--teal);
}
.hero-badge.gold {
  background: rgba(226,149,120,0.15);
  color: var(--gold-dark);
}
.hero-badge.green {
  background: rgba(46,125,50,0.1);
  color: #2e7d32;
}
.hero h1 {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  color: var(--ink);
  margin-bottom: 0.75rem;
  line-height: 1.1;
}
.hero h1 .accent {
  color: var(--teal);
}
.hero h1 .accent-gold {
  color: var(--gold);
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--charcoal-light);
  max-width: 650px;
  line-height: 1.65;
  margin-bottom: 2rem;
}
.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.hero-metric {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
}
.hero-metric strong {
  font-family: 'Fraunces', serif;
  font-size: 1.1rem;
  color: var(--teal);
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}

/* ── Sections ── */
.section {
  padding: 4rem 0;
}
.section.alt {
  background: var(--warm-white);
  border-top: 1px solid var(--light-border);
  border-bottom: 1px solid var(--light-border);
}
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}
.section-header h2 {
  margin-bottom: 0.75rem;
}
.section-header p {
  color: var(--charcoal-light);
  font-size: 1rem;
  line-height: 1.6;
}

/* ── What is BENI ── */
.beni-definition {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.beni-definition-text h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  margin-bottom: 1rem;
  color: var(--teal);
}
.beni-definition-text p {
  color: var(--charcoal-light);
  margin-bottom: 1rem;
  line-height: 1.7;
  font-size: 0.95rem;
}
.beni-definition-text .beni-expand {
  font-size: 1.1rem;
  line-height: 1.8;
  background: var(--sand-light);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  margin-top: 1rem;
}
.beni-definition-text .beni-expand strong {
  color: var(--teal);
}
.beni-quick-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.beni-fact {
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.beni-fact-value {
  font-family: 'Fraunces', serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--teal);
  line-height: 1.1;
  margin-bottom: 0.25rem;
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}
.beni-fact-label {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
}

/* ── Pipeline Visual ── */
.pipeline-showcase {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 900px;
  margin: 0 auto;
}
.pipeline-step {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem 1.25rem;
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.pipeline-step:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow-sm);
}
.pipeline-step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  background: var(--teal);
  color: white;
  font-family: 'Fraunces', serif;
  font-size: 0.9rem;
  font-weight: 700;
}
.pipeline-step-content {
  flex: 1;
  min-width: 0;
}
.pipeline-step-title {
  font-family: 'Fraunces', serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 2px;
}
.pipeline-step-desc {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}
.pipeline-step-stat {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--teal);
  text-align: right;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Results Grid ── */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}
.result-card {
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}
.result-card:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.result-card-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}
.result-card-value {
  font-family: 'Fraunces', serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--teal);
  line-height: 1.1;
  margin-bottom: 0.25rem;
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}
.result-card-label {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.4;
}

/* ── The Index ── */
.index-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.index-description h3 {
  color: var(--teal);
  margin-bottom: 0.75rem;
}
.index-description p {
  color: var(--charcoal-light);
  margin-bottom: 1rem;
  line-height: 1.7;
  font-size: 0.95rem;
}
.index-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.index-stat {
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.index-stat-value {
  font-family: 'Fraunces', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--teal);
  line-height: 1.1;
  margin-bottom: 0.25rem;
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}
.index-stat-label {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}
.correlation-note {
  grid-column: 1 / -1;
  background: var(--sand-light);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.82rem;
  color: var(--charcoal-light);
  line-height: 1.5;
}

/* ── Get Started ── */
.get-started-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}
.start-card {
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
}
.start-card:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.start-card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}
.start-card h3 {
  margin-bottom: 0.5rem;
}
.start-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}
.start-card code {
  display: block;
  padding: 0.75rem 1rem;
  background: var(--charcoal);
  color: #e2e8f0;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  line-height: 1.5;
  overflow-x: auto;
}

/* ── Roadmap ── */
.roadmap-timeline {
  max-width: 650px;
  margin: 0 auto;
}
.roadmap-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem 0;
  position: relative;
}
.roadmap-item + .roadmap-item {
  border-top: 1px solid var(--light-border);
}
.roadmap-dot {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 32px;
}
.roadmap-dot-inner {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 3px solid var(--teal);
  background: white;
  z-index: 1;
}
.roadmap-dot-inner.done {
  background: var(--teal);
}
.roadmap-dot-inner.active {
  background: var(--gold);
  border-color: var(--gold);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(226,149,120,0.4); }
  50% { box-shadow: 0 0 0 8px rgba(226,149,120,0); }
}
.roadmap-item-content { flex: 1; min-width: 0; }
.roadmap-item-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}
.roadmap-item-header h3 {
  font-size: 1rem;
  margin: 0;
}
.roadmap-status {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 999px;
}
.roadmap-status.done {
  background: rgba(46,125,50,0.1);
  color: #2e7d32;
}
.roadmap-status.active-now {
  background: rgba(226,149,120,0.15);
  color: var(--gold-dark);
}
.roadmap-status.planned {
  background: rgba(0,109,119,0.08);
  color: var(--muted);
}
.roadmap-item-content p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Papers ── */
.papers-grid {
  display: grid;
  gap: 1rem;
}
.paper-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.paper-card:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow-sm);
}
.paper-card-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  background: rgba(0,109,119,0.08);
  color: var(--teal);
  font-family: 'Fraunces', serif;
  font-size: 0.85rem;
  font-weight: 700;
}
.paper-card-content { flex: 1; min-width: 0; }
.paper-card-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 2px;
}
.paper-card-desc {
  font-size: 0.78rem;
  color: var(--muted);
}
.paper-card-status {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 999px;
  flex-shrink: 0;
}
.paper-card-status.done {
  background: rgba(46,125,50,0.1);
  color: #2e7d32;
}
.paper-card-status.active-status {
  background: rgba(226,149,120,0.12);
  color: var(--gold-dark);
}
.paper-card-status.planned {
  background: rgba(0,109,119,0.08);
  color: var(--muted);
}

/* ── Contribute ── */
.contribute-flex {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}
.contribute-card {
  background: white;
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}
.contribute-card:hover {
  border-color: var(--teal);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.contribute-card-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}
.contribute-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}
.contribute-card p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}
.contribute-card .btn-sm {
  display: inline-block;
  padding: 6px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1.5px solid var(--teal);
  border-radius: 999px;
  color: var(--teal);
  transition: all 0.2s;
}
.contribute-card .btn-sm:hover {
  background: var(--teal);
  color: white;
}

/* ── CTA Strip ── */
.cta-strip {
  text-align: center;
  padding: 3rem 0;
}
.cta-strip h2 {
  margin-bottom: 0.75rem;
}
.cta-strip p {
  color: var(--charcoal-light);
  margin-bottom: 1.5rem;
}
.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: var(--teal);
  color: white;
  border: none;
  border-radius: 999px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-primary:hover {
  background: var(--teal-dark);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: transparent;
  color: var(--teal);
  border: 1.5px solid var(--teal);
  border-radius: 999px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-outline:hover {
  background: var(--teal);
  color: white;
  transform: translateY(-1px);
}

/* ── Footer ── */
.footer {
  background: var(--charcoal);
  color: rgba(255,255,255,0.85);
  padding: 3rem 0 1.5rem;
  margin-top: 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-brand h3 {
  font-family: 'Fraunces', serif;
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: white;
  font-variation-settings: 'SOFT' 50, 'WONK' 0.5;
}
.footer-brand p {
  font-size: 0.85rem;
  opacity: 0.7;
  line-height: 1.5;
}
.footer-col h4 {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin-bottom: 0.75rem;
}
.footer-col a {
  display: block;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: white;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 1.25rem;
  text-align: center;
  font-size: 0.78rem;
  opacity: 0.5;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--cream);
    flex-direction: column;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--light-border);
    gap: 1rem;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

  .hero { padding: 6rem 0 2.5rem; }

  .beni-definition {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .beni-quick-facts {
    grid-template-columns: 1fr 1fr;
  }

  .index-showcase {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .pipeline-step {
    flex-wrap: wrap;
  }
  .pipeline-step-stat {
    width: 100%;
    text-align: left;
  }
}

@media (max-width: 480px) {
  .beni-quick-facts {
    grid-template-columns: 1fr;
  }
  .index-stats {
    grid-template-columns: 1fr;
  }
  .hero-metrics {
    flex-direction: column;
  }
}