/* ===================================
   CSS Variables - Design System
   =================================== */
:root {
  /* Color Palette */
  --color-primary: #0ea5e9;      /* Blue */
  --color-secondary: #10b981;    /* Green */
  --color-accent: #ef4444;       /* Red */
  --color-accent-alt: #8b5cf6;   /* Purple */
  
  /* Dark Theme Colors */
  --color-bg-primary: #0f172a;   /* Slate 900 */
  --color-bg-secondary: #1e293b; /* Slate 800 */
  --color-bg-tertiary: #334155;  /* Slate 700 */
  --color-surface: #475569;      /* Slate 600 */
  
  /* Text Colors */
  --color-text-primary: #f8fafc;   /* Slate 50 */
  --color-text-secondary: #cbd5e1; /* Slate 300 */
  --color-text-tertiary: #94a3b8;  /* Slate 400 */
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-heading: 'Space Grotesk', var(--font-family-primary);
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  
  /* Spacing */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-sm: 0.375rem;  /* 6px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* ===================================
   Reset & Base Styles
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-secondary);
}

ul, ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

/* ===================================
   Layout Components
   =================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-tertiary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===================================
   Button Components
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn i {
  font-size: var(--font-size-base);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
}

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

.btn-secondary:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ===================================
   Navigation
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-bg-secondary);
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-brand h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-8);
}

.nav-link {
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-link i {
  font-size: var(--font-size-sm);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  transition: width var(--transition-normal);
}

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

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: var(--space-1);
}

.lang-btn {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: transparent;
  color: var(--color-text-tertiary);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-primary);
}

.lang-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: var(--space-1);
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 600px;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: var(--space-4);
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 500px;
  position: relative;
}

.hero-graphic {
  position: relative;
  width: 400px;
  height: 400px;
}

.dna-helix {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 300px;
  background: linear-gradient(45deg, var(--color-primary), var(--color-secondary));
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  opacity: 0.1;
  animation: rotate 10s linear infinite;
}

.research-icons {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.icon {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 6s ease-in-out infinite;
}

.icon.microscope {
  top: 20%;
  left: 20%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-alt));
  animation-delay: 0s;
}

.icon.molecule {
  top: 60%;
  right: 20%;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  animation-delay: 2s;
}

.icon.virus {
  bottom: 20%;
  left: 30%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  animation-delay: 4s;
}

/* ===================================
   About Section
   =================================== */
.about {
  padding: var(--space-24) 0;
  background: var(--color-bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.about-card {
  background: var(--color-bg-primary);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-bg-tertiary);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.about-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.card-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.card-icon i {
  font-size: 2rem;
  color: white;
}

.about-card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.about-card p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ===================================
   Research Section
   =================================== */
.research {
  padding: var(--space-24) 0;
  background: var(--color-bg-primary);
}

.research-areas {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.research-area {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-12);
  align-items: center;
  padding: var(--space-8);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-bg-tertiary);
}

.research-area:nth-child(even) {
  grid-template-columns: 2fr 1fr;
}

.research-area:nth-child(even) .research-visual {
  order: 2;
}

.research-visual {
  position: relative;
  height: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-tertiary), var(--color-surface));
  display: flex;
  align-items: center;
  justify-content: center;
}

.research-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.virus-particles {
  position: relative;
  width: 100%;
  height: 100%;
}

.virus-particles::before,
.virus-particles::after {
  content: '';
  position: absolute;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt));
  animation: pulse 4s ease-in-out infinite;
}

.virus-particles::before {
  top: 30%;
  left: 25%;
  width: 60px;
  height: 60px;
  animation-delay: 0s;
}

.virus-particles::after {
  bottom: 30%;
  right: 25%;
  width: 40px;
  height: 40px;
  animation-delay: 2s;
}

.cellular-network {
  position: relative;
  width: 100%;
  height: 100%;
}

.cellular-network::before,
.cellular-network::after {
  content: '';
  position: absolute;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  animation: glow 6s ease-in-out infinite;
}

.cellular-network::before {
  top: 20%;
  left: 30%;
  width: 50px;
  height: 50px;
  animation-delay: 1s;
}

.cellular-network::after {
  bottom: 20%;
  right: 30%;
  width: 70px;
  height: 70px;
  animation-delay: 3s;
}

.research-content h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.research-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.8;
}

.research-content ul {
  list-style: none;
  padding: 0;
}

.research-content li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
}

.research-content li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

/* ===================================
   Facilities Section
   =================================== */
.facilities {
  padding: var(--space-24) 0;
  background: var(--color-bg-secondary);
}

.facilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.facility-card {
  background: var(--color-bg-primary);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-bg-tertiary);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.facility-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.1), transparent);
  transition: left var(--transition-slow);
}

.facility-card:hover::before {
  left: 100%;
}

.facility-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.facility-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.facility-icon i {
  font-size: 2rem;
  color: white;
}

.facility-icon.biosafety { background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt)); }
.facility-icon.molecular { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); }
.facility-icon.cell-culture { background: linear-gradient(135deg, var(--color-secondary), var(--color-primary)); }
.facility-icon.imaging { background: linear-gradient(135deg, var(--color-accent-alt), var(--color-accent)); }
.facility-icon.data { background: linear-gradient(135deg, var(--color-primary), var(--color-accent-alt)); }
.facility-icon.storage { background: linear-gradient(135deg, var(--color-secondary), var(--color-accent)); }

.facility-card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.facility-card p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ===================================
   Partnerships Section
   =================================== */
.partnerships {
  padding: var(--space-24) 0;
  background: var(--color-bg-primary);
}

.partnerships-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.partnership-card {
  background: var(--color-bg-secondary);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-bg-tertiary);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.partnership-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.1), transparent);
  transition: left var(--transition-slow);
}

.partnership-card:hover::before {
  left: 100%;
}

.partnership-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.partnership-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.partnership-icon i {
  font-size: 2rem;
  color: white;
}

.partnership-icon.suppliers { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); }
.partnership-icon.collaboration { background: linear-gradient(135deg, var(--color-secondary), var(--color-accent-alt)); }
.partnership-icon.quality { background: linear-gradient(135deg, var(--color-accent), var(--color-primary)); }

.partnership-card h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.partnership-card p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.partnership-cta {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  padding: var(--space-10);
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid var(--color-surface);
  margin-top: var(--space-8);
}

.partnership-cta h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.partnership-cta p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.8;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
  padding: var(--space-24) 0;
  background: var(--color-bg-secondary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon i {
  font-size: 1.25rem;
  color: white;
}

.contact-icon.location { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); }
.contact-icon.email { background: linear-gradient(135deg, var(--color-secondary), var(--color-accent-alt)); }
.contact-icon.phone { background: linear-gradient(135deg, var(--color-accent), var(--color-primary)); }

.contact-item h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  font-size: var(--font-size-lg);
}

.contact-item p {
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}

.contact-item a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.contact-item a:hover {
  color: var(--color-secondary);
}

/* Contact Form */
/* Contact Additional Section */
.contact-additional {
  background: var(--color-bg-primary);
  padding: var(--space-10);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-bg-tertiary);
  text-align: center;
}

.contact-message h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-2xl);
}

.contact-message p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.8;
  font-size: var(--font-size-lg);
}

.contact-cta {
  display: flex;
  justify-content: center;
}

.contact-cta .btn {
  min-width: 200px;
  justify-content: center;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-bg-secondary);
  padding: var(--space-16) 0 var(--space-8) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-info h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.footer-info p {
  color: var(--color-text-tertiary);
  line-height: 1.8;
}

.footer-links h4,
.footer-contact h4 {
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast);
}

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

.footer-contact p {
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.footer-contact a {
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-bg-secondary);
}

.footer-bottom p {
  color: var(--color-text-tertiary);
  margin: 0;
  font-size: var(--font-size-sm);
}

/* ===================================
   Animations
   =================================== */
@keyframes rotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(14, 165, 233, 0.3); }
  50% { box-shadow: 0 0 40px rgba(16, 185, 129, 0.5); }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-12);
    text-align: center;
  }
  
  .hero-visual {
    height: 300px;
  }
  
  .hero-graphic {
    width: 300px;
    height: 300px;
  }
  
  .research-area {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .research-area:nth-child(even) {
    grid-template-columns: 1fr;
  }
  
  .research-area:nth-child(even) .research-visual {
    order: 0;
  }
  
  .partnerships-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;   /* 40px */
    --font-size-4xl: 2rem;     /* 32px */
    --font-size-3xl: 1.5rem;   /* 24px */
  }
  
  .container {
    padding: 0 var(--space-4);
  }
  
  .nav-container {
    padding: 0 var(--space-4);
  }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--color-bg-primary);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--space-16);
    transition: left var(--transition-normal);
    border-right: 1px solid var(--color-bg-secondary);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-item {
    margin-bottom: var(--space-4);
  }
  
  .language-switcher {
    margin-top: var(--space-8);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero {
    min-height: 80vh;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
    max-width: 250px;
  }
  
  .facilities-grid {
    grid-template-columns: 1fr;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --space-24: 4rem;  /* 64px */
    --space-16: 3rem;  /* 48px */
    --space-12: 2rem;  /* 32px */
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .hero-description {
    font-size: var(--font-size-base);
  }
  
  .section-header h2 {
    font-size: var(--font-size-3xl);
  }
  
  .contact-item {
    flex-direction: column;
    text-align: center;
  }
}