:root {
  /* Color Palette - Neutral with Dynamic Color Transitions */
  --color-primary: #3a86ff;
  --color-primary-light: #4f9bff;
  --color-primary-dark: #2563eb;
  --color-secondary: #ff6b6b;
  --color-secondary-light: #ff8a8a;
  --color-secondary-dark: #e63946;
  --color-accent: #4cc9f0;
  --color-accent-light: #72d6f7;
  --color-accent-dark: #0096c7;
  
  /* Neutral Colors */
  --color-dark: #212529;
  --color-dark-gray: #343a40;
  --color-medium-gray: #6c757d;
  --color-light-gray: #dee2e6;
  --color-light: #f8f9fa;
  --color-white: #ffffff;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  --gradient-overlay: linear-gradient(135deg, rgba(0,0,0,0.7), rgba(0,0,0,0.5));
  
  /* Typography */
  --font-heading: 'Inter', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  
  /* Borders */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-light);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  color: var(--color-dark);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  position: relative;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: var(--space-sm);
}

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

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

/* Buttons */
.btn, 
button, 
input[type='submit'] {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  text-align: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-medium);
  box-shadow: var(--shadow-sm);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 1px;
}

.btn:hover, 
button:hover, 
input[type='submit']:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn:active, 
button:active, 
input[type='submit']:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-lg);
  position: relative;
  display: inline-block;
  padding-bottom: var(--space-xs);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 3px;
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(5px);
  transition: all var(--transition-medium);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
}

.logo a {
  display: flex;
  align-items: center;
}

.logo h1 {
  font-size: 1.5rem;
  margin-bottom: 0;
  color: var(--color-dark);
  transition: color var(--transition-fast);
}

.logo h1:hover {
  color: var(--color-primary);
}

.main-nav ul {
  display: flex;
  gap: var(--space-sm);
}

.main-nav ul li a {
  padding: 0.5rem 0.75rem;
  color: var(--color-dark);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.main-nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-medium);
}

.main-nav ul li a:hover {
  color: var(--color-primary);
}

.main-nav ul li a:hover::after {
  width: 100%;
}

.burger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
}

.burger-menu span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--color-dark);
  border-radius: 3px;
  transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
  position: relative;
  padding: var(--space-xl) 0;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  margin-top: 70px;
  color: var(--color-white);
}

.hero .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-overlay);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-lg) 0;
}

.hero-content h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: var(--space-lg);
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* Mission Section */
.mission-section {
  padding: var(--space-xl) 0;
  background-color: var(--color-white);
}

.mission-content {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  margin-bottom: var(--space-lg);
}

.mission-text {
  flex: 1;
}

.mission-image {
  flex: 1;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.mission-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.mission-image:hover img {
  transform: scale(1.03);
}

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

.card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-content {
  padding: var(--space-sm);
  text-align: center;
  flex-grow: 1;
}

.card-content h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-xs);
}

/* Research Section */
.research-section {
  padding: var(--space-xl) 0;
  background-color: var(--color-light);
}

.research-intro {
  max-width: 800px;
  margin: 0 auto var(--space-lg);
  text-align: center;
  font-size: 1.1rem;
}

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

/* Innovation Section */
.innovation-section {
  padding: var(--space-xl) 0;
  background-color: var(--color-white);
}

.innovation-content {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  margin-bottom: var(--space-lg);
}

.innovation-text {
  flex: 1;
}

.innovation-image {
  flex: 1;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.innovation-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.innovation-image:hover img {
  transform: scale(1.03);
}

.toggles-container {
  background-color: var(--color-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
}

.toggles-container h3 {
  text-align: center;
  margin-bottom: var(--space-md);
}

.toggle-switches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.toggle span {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.toggle p {
  margin-top: var(--space-xs);
  font-size: 0.9rem;
  color: var(--color-medium-gray);
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
  margin: var(--space-xs) 0;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-light-gray);
  transition: var(--transition-fast);
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: var(--color-white);
  transition: var(--transition-fast);
}

input:checked + .slider {
  background-color: var(--color-primary);
}

input:checked + .slider:before {
  transform: translateX(26px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

/* External Resources Section */
.external-resources {
  padding: var(--space-xl) 0;
  background-color: var(--color-light);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
}

.resource-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.resource-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.resource-card h3 {
  margin-bottom: var(--space-sm);
  position: relative;
  padding-bottom: var(--space-xs);
}

.resource-card h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--gradient-primary);
}

.resource-card ul {
  margin-top: var(--space-sm);
}

.resource-card ul li {
  margin-bottom: var(--space-xs);
}

.resource-card ul li a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
  display: inline-block;
  position: relative;
}

.resource-card ul li a::after {
  content: '→';
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity var(--transition-fast), right var(--transition-fast);
}

.resource-card ul li a:hover {
  color: var(--color-primary-dark);
}

.resource-card ul li a:hover::after {
  opacity: 1;
  right: -15px;
}

/* Methodology Section */
.methodology-section {
  padding: var(--space-xl) 0;
  background-color: var(--color-white);
}

.methodology-content {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.methodology-text {
  flex: 1;
}

.methodology-image {
  flex: 1;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.methodology-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.methodology-image:hover img {
  transform: scale(1.03);
}

/* Success Stories Section */
.success-stories-section {
  padding: var(--space-xl) 0;
  background-color: var(--color-light);
}

.stories-intro {
  max-width: 800px;
  margin: 0 auto var(--space-lg);
  text-align: center;
  font-size: 1.1rem;
}

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

/* Careers Section */
.careers-section {
  padding: var(--space-xl) 0;
  background-color: var(--color-white);
}

.careers-content {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.careers-text {
  flex: 1;
}

.careers-text ul {
  list-style: disc;
  padding-left: var(--space-md);
  margin-bottom: var(--space-sm);
}

.careers-image {
  flex: 1;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.careers-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.careers-image:hover img {
  transform: scale(1.03);
}

/* Contact Section */
.contact-section {
  padding: var(--space-xl) 0;
  background-color: var(--color-light);
}

.contact-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-lg);
}

.contact-info, .contact-form {
  background-color: var(--color-white);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
}

.contact-info h3, .contact-form h3 {
  margin-bottom: var(--space-md);
  position: relative;
  padding-bottom: var(--space-xs);
}

.contact-info h3::after, .contact-form h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--gradient-primary);
}

.contact-info ul {
  margin-bottom: var(--space-md);
}

.contact-info ul li {
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
}

.contact-info ul li i {
  margin-right: var(--space-xs);
  color: var(--color-primary);
}

.contact-image {
  margin-top: var(--space-md);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.contact-image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.contact-image:hover img {
  transform: scale(1.03);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-light-gray);
  border-radius: var(--border-radius-sm);
  transition: border-color var(--transition-fast);
  font-family: var(--font-body);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--color-primary);
  outline: none;
}

/* Footer */
.footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-lg) 0 var(--space-sm);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.footer-logo h3 {
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.footer-logo p {
  color: var(--color-light-gray);
  font-size: 0.9rem;
}

.footer-links h4, .footer-social h4, .footer-contact h4 {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
  position: relative;
  padding-bottom: var(--space-xs);
  display: inline-block;
}

.footer-links h4::after, .footer-social h4::after, .footer-contact h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-primary);
}

.footer-links ul li, .footer-social ul li {
  margin-bottom: var(--space-xs);
}

.footer-links ul li a, .footer-social ul li a {
  color: var(--color-light-gray);
  transition: color var(--transition-fast);
}

.footer-links ul li a:hover, .footer-social ul li a:hover {
  color: var(--color-white);
}

.footer-social ul li a {
  display: flex;
  align-items: center;
}

.footer-contact p {
  color: var(--color-light-gray);
  margin-bottom: var(--space-xs);
  font-size: 0.9rem;
}

.footer-bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: var(--color-light-gray);
  font-size: 0.9rem;
}

/* Special Pages */
.success-page {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.success-content {
  max-width: 600px;
  padding: var(--space-lg);
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.privacy-content, .terms-content {
  padding-top: 100px;
  max-width: 800px;
  margin: 0 auto;
}

/* Media Queries */
@media (max-width: 992px) {
  .mission-content, .innovation-content, .methodology-content, .careers-content {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .mission-image, .innovation-image, .methodology-image, .careers-image {
    order: -1;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  
  .burger-menu {
    display: flex;
  }
  
  .hero-content h2 {
    font-size: 2.2rem;
  }
  
  .hero-content p {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .toggle-switches {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  :root {
    --space-xl: 3rem;
    --space-lg: 2rem;
  }
  
  .hero-content h2 {
    font-size: 1.8rem;
  }
}

/* Animations and Effects */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

.pulse {
  animation: pulse 2s infinite;
}

/* Additional Utility Classes */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.highlight {
  color: var(--color-primary);
  font-weight: 600;
}