/* ============================================
   TELOGENIS.ORG - Scientific Authority Layer
   Design System v1.0
   ============================================ */

:root {
  --deep-midnight: #0B1F33;
  --scientific-navy: #123456;
  --soft-white: #F8FAFC;
  --telomere-gold: #D4AF37;
  --cellular-teal: #00A6A6;
  --research-silver: #B8C2CC;
  --success-green: #2E8B57;
  --warning-amber: #D89B00;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --border-light: #e2e8f0;
  --glass-bg: rgba(255,255,255,0.85);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  color: var(--text-primary);
  background: var(--soft-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--deep-midnight);
}

.mono { font-family: 'IBM Plex Mono', monospace; }

/* ============================================
   NAVIGATION
   ============================================ */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11, 31, 51, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--cellular-teal), var(--telomere-gold));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: white;
  font-size: 14px;
  letter-spacing: 0.5px;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: white;
  letter-spacing: 1px;
}

.logo-sub {
  font-size: 10px;
  color: var(--research-silver);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: -2px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover {
  color: white;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cellular-teal);
  transition: var(--transition);
}

.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: transparent;
  border: 1px solid var(--cellular-teal);
  color: var(--cellular-teal);
  padding: 10px 24px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  letter-spacing: 0.5px;
}

.nav-cta:hover {
  background: var(--cellular-teal);
  color: var(--deep-midnight);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--deep-midnight);
}

#cellular-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(ellipse at center, rgba(11,31,51,0.3) 0%, rgba(11,31,51,0.85) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 900px;
  padding: 120px 24px 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,166,166,0.15);
  border: 1px solid rgba(0,166,166,0.3);
  color: var(--cellular-teal);
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--cellular-teal);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  color: white;
  margin-bottom: 24px;
  line-height: 1.1;
  letter-spacing: -1px;
}

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

.hero-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: rgba(255,255,255,0.7);
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.7;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--cellular-teal), #008b8b);
  color: white;
  padding: 16px 36px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,166,166,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,166,166,0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.08);
  color: white;
  padding: 16px 36px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.3);
}

.hero-stats {
  position: absolute;
  bottom: 40px;
  left: 0; right: 0;
  z-index: 3;
  display: flex;
  justify-content: center;
  gap: 64px;
  padding: 0 24px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 28px;
  font-weight: 600;
  color: white;
  display: block;
}

.stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 4px;
}

/* ============================================
   SECTION UTILITIES
   ============================================ */

.section {
  padding: 100px 24px;
  position: relative;
}

.section-alt {
  background: white;
}

.section-dark {
  background: linear-gradient(180deg, var(--deep-midnight) 0%, #0a1929 100%);
  color: white;
}

.section-dark h2,
.section-dark h3 {
  color: white;
}

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  color: var(--cellular-teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.7;
}

.section-dark .section-header p {
  color: rgba(255,255,255,0.65);
}

/* ============================================
   TELomere VISUALIZATION SECTION
   ============================================ */

.telomere-viz {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.telomere-canvas-container {
  position: relative;
  background: linear-gradient(135deg, #f0f4f8 0%, #e8eef5 100%);
  border-radius: var(--radius-lg);
  padding: 40px;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#telomere-stage {
  width: 100%;
  max-width: 400px;
}

.telomere-controls {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  justify-content: center;
}

.viz-btn {
  padding: 10px 20px;
  border-radius: 100px;
  border: 1px solid var(--border-light);
  background: white;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
}

.viz-btn.active {
  background: var(--cellular-teal);
  color: white;
  border-color: var(--cellular-teal);
}

.telomere-info h3 {
  font-size: 32px;
  margin-bottom: 20px;
}

.telomere-info p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 16px;
  line-height: 1.7;
}

.telomere-facts {
  list-style: none;
  margin-top: 24px;
}

.telomere-facts li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 15px;
  color: var(--text-secondary);
}

.telomere-facts li svg {
  flex-shrink: 0;
  margin-top: 2px;
}

/* ============================================
   RESEARCH CARDS
   ============================================ */

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.research-card {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: linear-gradient(180deg, var(--cellular-teal), var(--telomere-gold));
  opacity: 0;
  transition: var(--transition);
}

.research-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.research-card:hover::before {
  opacity: 1;
}

.research-meta {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.research-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(0,166,166,0.08);
  color: var(--cellular-teal);
}

.research-tag.gold {
  background: rgba(212,175,55,0.08);
  color: var(--telomere-gold);
}

.research-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  line-height: 1.4;
}

.research-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.research-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--text-muted);
}

.research-footer a {
  color: var(--cellular-teal);
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ============================================
   KNOWLEDGE CENTER
   ============================================ */

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.knowledge-card {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.knowledge-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--cellular-teal);
}

.knowledge-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, rgba(0,166,166,0.1), rgba(212,175,55,0.1));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 20px;
}

.knowledge-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.knowledge-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.knowledge-card .arrow {
  margin-top: 16px;
  color: var(--cellular-teal);
  font-weight: 600;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ============================================
   ADVISORY BOARD
   ============================================ */

.board-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.board-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.board-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(0,166,166,0.3);
  transform: translateY(-4px);
}

.board-avatar {
  width: 96px; height: 96px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cellular-teal), var(--telomere-gold));
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: white;
  font-weight: 700;
}

.board-card h3 {
  font-size: 18px;
  margin-bottom: 6px;
  color: white;
}

.board-role {
  font-size: 13px;
  color: var(--cellular-teal);
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.board-institution {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}

.board-links {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.board-links a {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 12px;
  transition: var(--transition);
}

.board-links a:hover {
  background: var(--cellular-teal);
  color: white;
}

/* ============================================
   LATEST RESEARCH LIST
   ============================================ */

.article-list {
  max-width: 900px;
  margin: 0 auto;
}

.article-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.article-item:hover {
  padding-left: 12px;
}

.article-date {
  text-align: center;
  min-width: 60px;
}

.article-date .day {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 24px;
  font-weight: 600;
  color: var(--cellular-teal);
  line-height: 1;
}

.article-date .month {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.article-content h4 {
  font-size: 17px;
  margin-bottom: 6px;
  transition: var(--transition);
}

.article-item:hover .article-content h4 {
  color: var(--cellular-teal);
}

.article-content p {
  font-size: 14px;
  color: var(--text-secondary);
}

.article-arrow {
  color: var(--text-muted);
  transition: var(--transition);
}

.article-item:hover .article-arrow {
  color: var(--cellular-teal);
  transform: translateX(4px);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
  background: #070f1a;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 80px 24px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto 64px;
}

.footer-brand .logo-text {
  font-size: 22px;
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  color: white;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

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

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

.footer-col a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--cellular-teal);
}

.footer-disclaimer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-disclaimer p {
  color: rgba(255,255,255,0.35);
  font-size: 12px;
  line-height: 1.8;
  margin-bottom: 8px;
}

.footer-bottom {
  max-width: 1200px;
  margin: 32px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: rgba(255,255,255,0.3);
  font-size: 13px;
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  font-size: 13px;
  transition: var(--transition);
}

.footer-bottom a:hover {
  color: var(--cellular-teal);
}

.commercial-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(212,175,55,0.1);
  color: var(--telomere-gold) !important;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px !important;
  font-weight: 600;
}

/* ============================================
   PAGE HEADER (for subpages)
   ============================================ */

.page-header {
  background: linear-gradient(180deg, var(--deep-midnight) 0%, var(--scientific-navy) 100%);
  padding: 140px 24px 80px;
  text-align: center;
}

.page-header h1 {
  color: white;
  font-size: clamp(32px, 4vw, 48px);
  margin-bottom: 16px;
}

.page-header p {
  color: rgba(255,255,255,0.6);
  font-size: 18px;
  max-width: 640px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.breadcrumb a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--cellular-teal);
}

/* ============================================
   CONTENT STYLES (for articles/pages)
   ============================================ */

.content-body {
  max-width: 800px;
  margin: 0 auto;
  padding: 64px 24px;
}

.content-body h2 {
  font-size: 28px;
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-light);
}

.content-body h3 {
  font-size: 20px;
  margin: 32px 0 14px;
  color: var(--scientific-navy);
}

.content-body p {
  margin-bottom: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.content-body ul, .content-body ol {
  margin-bottom: 20px;
  padding-left: 24px;
  color: var(--text-secondary);
}

.content-body li {
  margin-bottom: 10px;
  line-height: 1.7;
}

.info-box {
  background: linear-gradient(135deg, rgba(0,166,166,0.05), rgba(212,175,55,0.05));
  border-left: 4px solid var(--cellular-teal);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 24px;
  margin: 32px 0;
}

.info-box h4 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--deep-midnight);
}

.info-box p {
  margin: 0;
  font-size: 14px;
}

/* ============================================
   E-E-A-T BAR
   ============================================ */

.eeat-bar {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
}

.eeat-bar strong {
  color: var(--text-primary);
}

.eeat-bar a {
  color: var(--cellular-teal);
  text-decoration: none;
}

/* ============================================
   CALCULATOR / TOOL STYLES
   ============================================ */

.tool-container {
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 700px;
  margin: 0 auto;
}

.tool-input-group {
  margin-bottom: 24px;
}

.tool-input-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.tool-input-group input,
.tool-input-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  transition: var(--transition);
}

.tool-input-group input:focus,
.tool-input-group select:focus {
  outline: none;
  border-color: var(--cellular-teal);
  box-shadow: 0 0 0 3px rgba(0,166,166,0.1);
}

.tool-result {
  background: linear-gradient(135deg, var(--deep-midnight), var(--scientific-navy));
  color: white;
  padding: 32px;
  border-radius: var(--radius-md);
  margin-top: 32px;
  text-align: center;
}

.tool-result h4 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--cellular-teal);
  margin-bottom: 8px;
}

.tool-result .result-value {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 36px;
  font-weight: 600;
}

/* ============================================
   DATABASE TABLE
   ============================================ */

.data-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  background: var(--deep-midnight);
  color: white;
  font-weight: 600;
  text-align: left;
  padding: 14px 20px;
  font-size: 12px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  white-space: nowrap;
}

.data-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: top;
}

.data-table tr:hover td {
  background: rgba(0,166,166,0.03);
}

.data-table a {
  color: var(--cellular-teal);
  text-decoration: none;
  font-weight: 600;
}

/* ============================================
   FILTER BAR
   ============================================ */

.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-bar select,
.filter-bar input {
  padding: 10px 16px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: white;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .telomere-viz { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 32px; }
}

@media (max-width: 600px) {
  .section { padding: 64px 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions a { width: 100%; justify-content: center; }
  .research-grid { grid-template-columns: 1fr; }
  .article-item { grid-template-columns: 1fr; gap: 12px; }
  .article-date { display: none; }
}

/* ============================================
   ANIMATIONS
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }