:root {
  --primary: #1e3a8a;
  --primary-light: #2563eb;
  --accent: #0284c7;
  --accent-light: #38bdf8;
  --amber: #f59e0b;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --white: #ffffff;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--slate-800);
  background-color: var(--slate-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
}

.site-header .container {
  max-width: 1280px;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 800;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-top: 3px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-shrink: 0;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--slate-600);
  white-space: nowrap;
  transition: color 0.15s ease;
  padding: 6px 0;
  display: inline-block;
}

.nav-link:hover {
  color: var(--primary-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

/* Language Switcher */
.lang-switcher-wrap {
  position: relative;
  flex-shrink: 0;
}

.lang-switcher-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--slate-100);
  border: 1px solid var(--slate-200);
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--slate-700);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.lang-switcher-trigger:hover {
  background: var(--slate-200);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 170px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-xl);
  padding: 6px;
  display: none;
  flex-direction: column;
  gap: 2px;
  z-index: 100;
}

.lang-dropdown.open {
  display: flex;
}

.lang-option {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--slate-700);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.15s ease;
  white-space: nowrap;
}

.lang-option:hover {
  background: var(--slate-100);
  color: var(--primary-light);
}

.lang-option.active {
  font-weight: 700;
  color: var(--primary-light);
  background: rgba(37, 99, 235, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: var(--primary-light);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--primary);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--slate-100);
  color: var(--slate-700);
}

.btn-secondary:hover {
  background: var(--slate-200);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--slate-300);
  color: var(--slate-700);
}

.btn-outline:hover {
  border-color: var(--slate-400);
  background: var(--slate-100);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  background: radial-gradient(circle at 80% 20%, rgba(56, 189, 248, 0.15), transparent 40%),
              radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.08), transparent 45%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary-light);
  margin-bottom: 20px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-light);
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--slate-900);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title span {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--slate-600);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  border-top: 1px solid var(--slate-200);
  padding-top: 32px;
}

.stat-item h4 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--slate-900);
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--slate-600);
}

/* Hero Visual Card */
.hero-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-xl);
  position: relative;
}

.card-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--slate-100);
}

.card-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--slate-900);
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #16a34a;
}

.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #16a34a;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.path-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.path-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px;
  border-radius: var(--radius-md);
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.path-card:hover {
  transform: translateX(4px);
  border-color: var(--accent-light);
}

.path-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--white);
}

.icon-purple { background: linear-gradient(135deg, #8b5cf6, #6366f1); }
.icon-blue { background: linear-gradient(135deg, #0ea5e9, #2563eb); }
.icon-emerald { background: linear-gradient(135deg, #10b981, #059669); }
.icon-amber { background: linear-gradient(135deg, #f59e0b, #d97706); }

.path-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--slate-900);
}

.path-info p {
  font-size: 0.8rem;
  color: var(--slate-600);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--slate-600);
}

/* Pathways Section (Tabs) */
.pathways-section {
  padding: 90px 0;
  background: var(--white);
}

.tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: var(--slate-100);
  color: var(--slate-600);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-info h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 16px;
}

.tab-desc {
  font-size: 1rem;
  color: var(--slate-600);
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--slate-700);
}

.feature-list li::before {
  content: "✓";
  display: inline-flex;
  width: 20px;
  height: 20px;
  background: #dcfce7;
  color: #16a34a;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
}

.tab-preview-box {
  background: linear-gradient(135deg, #f8fafc, #e2e8f0);
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 1px solid var(--slate-200);
}

.preview-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  border: 1px solid var(--slate-200);
}

/* Pillars Section */
.pillars-section {
  padding: 90px 0;
  background: var(--slate-50);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.pillar-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pillar-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(37, 99, 235, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-light);
  margin-bottom: 20px;
}

.pillar-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 12px;
}

.pillar-card p {
  font-size: 0.95rem;
  color: var(--slate-600);
  line-height: 1.6;
}

/* Research & Global Impact */
.research-section {
  padding: 90px 0;
  background: var(--white);
}

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

.research-card {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 24px;
  background: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.research-meta {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.research-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 12px;
}

.research-card p {
  font-size: 0.9rem;
  color: var(--slate-600);
  margin-bottom: 20px;
}

.research-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-light);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* FAQ Accordion */
.faq-section {
  padding: 90px 0;
  background: var(--slate-50);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--slate-900);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.2s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--slate-600);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 24px 20px 24px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* Footer */
.site-footer {
  background: var(--slate-900);
  color: var(--slate-300);
  padding: 80px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand h4 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--slate-400);
  margin-bottom: 24px;
  line-height: 1.6;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--slate-400);
  transition: color 0.15s ease;
}

.footer-link:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--slate-400);
  flex-wrap: wrap;
  gap: 16px;
}

.accreditation-badges {
  display: flex;
  gap: 16px;
  align-items: center;
}

.accred-tag {
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  color: var(--slate-200);
}

/* Responsive */
@media (max-width: 1100px) {
  .nav-links {
    gap: 14px;
  }
  .nav-actions .btn-secondary {
    display: none;
  }
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .tab-content.active {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-secondary {
    display: none;
  }
  .hero-title {
    font-size: 2.3rem;
  }
  .research-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}