:root {
  /* Primary Colors */
  --primary-color: #3a7bd5;
  --primary-dark: #2c5aa0;
  --primary-light: #6fa3e8;
  
  /* Secondary Colors */
  --secondary-color: #ff6b6b;
  --secondary-dark: #e84a4a;
  --secondary-light: #ff9a9a;
  
  /* Accent Colors */
  --accent-color: #00d2d3;
  --accent-dark: #00a0a1;
  --accent-light: #5edfdf;
  
  /* Neutral Colors */
  --dark: #2d3436;
  --dark-gray: #636e72;
  --medium-gray: #b2bec3;
  --light-gray: #dfe6e9;
  --off-white: #f9f9f9;
  --white: #ffffff;
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  --secondary-gradient: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  
  /* Typography */
  --heading-font: 'Raleway', sans-serif;
  --body-font: 'Open Sans', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 5rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Container Width */
  --container-width: 1200px;
  --container-padding: 2rem;
}

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

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

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

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--dark);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  position: relative;
  margin-bottom: var(--spacing-xl);
}

h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -15px;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: var(--spacing-md);
}

ul {
  list-style: none;
}

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

section {
  padding: var(--spacing-xl) 0;
}

.section-description {
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
  text-align: center;
  color: var(--dark-gray);
  font-size: 1.1rem;
}

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

.btn:hover,
button:hover,
input[type='submit']:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  background-color: var(--primary-dark);
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--white);
}

.btn-secondary:hover {
  background-color: var(--secondary-dark);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.header.scrolled {
  height: 70px;
  box-shadow: var(--shadow-md);
}

.logo a {
  font-family: var(--heading-font);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  transition: color var(--transition-normal);
}

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

.main-nav ul {
  display: flex;
}

.main-nav li {
  margin-left: var(--spacing-md);
}

.main-nav a {
  color: var(--dark);
  font-weight: 600;
  padding: 0.5rem;
  position: relative;
}

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

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

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

.burger-menu {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.burger-menu span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--dark);
  margin: 3px 0;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 180px 0 120px;
  margin-top: 0;
  overflow: hidden;
}

.hero .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.7));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-content h1 {
  color: var(--white);
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  animation: fadeInDown 1s ease;
}

.hero-content p {
  color: var(--white);
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  margin-bottom: var(--spacing-xl);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1s ease 0.3s forwards;
  opacity: 0;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  animation: fadeInUp 1s ease 0.6s forwards;
  opacity: 0;
}

/* Services Section */
.services {
  text-align: center;
  background-color: var(--white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

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

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

.card-content {
  padding: var(--spacing-lg);
  text-align: left;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card-content h3 {
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.card-content p {
  margin-bottom: var(--spacing-lg);
  color: var(--dark-gray);
  flex-grow: 1;
}

.card .btn {
  align-self: flex-start;
}

/* Process Section */
.process {
  background-color: var(--off-white);
}

.timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
}

.timeline-item {
  display: flex;
  justify-content: flex-start;
  position: relative;
  margin-bottom: var(--spacing-xl);
}

.timeline-item:nth-child(even) {
  justify-content: flex-end;
}

.timeline-marker {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 50px;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  z-index: 1;
}

.timeline-content {
  width: 45%;
  background-color: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

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

.timeline-content h3 {
  color: var(--primary-color);
}

/* Research Section */
.research {
  text-align: center;
  background-color: var(--white);
}

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

.research-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-lg);
  background-color: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

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

.research-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
}

.research-item h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.progress-container {
  width: 100%;
  height: 10px;
  background-color: var(--light-gray);
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
  position: relative;
  transition: width 1s ease;
}

.progress-bar span {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
}

.research-item p {
  text-align: left;
  color: var(--dark-gray);
}

/* Resources Section */
.resources {
  background-color: var(--off-white);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.resource-card {
  background-color: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

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

.resource-card h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.resource-card ul li {
  margin-bottom: var(--spacing-sm);
}

.resource-card a {
  color: var(--primary-color);
  font-weight: 600;
  transition: color var(--transition-normal);
}

.resource-card a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Innovation Section */
.innovation {
  background-color: var(--white);
}

.innovation-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-xl);
}

.innovation-image {
  flex: 1;
  min-width: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.innovation-image img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

.innovation-text {
  flex: 1;
  min-width: 300px;
}

.innovation-text h3 {
  color: var(--primary-color);
  margin-top: var(--spacing-lg);
}

.innovation-text h3:first-child {
  margin-top: 0;
}

.innovation-text p {
  color: var(--dark-gray);
}

/* Press Section */
.press {
  background-color: var(--off-white);
}

.press-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

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

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

.press-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.press-content {
  padding: var(--spacing-lg);
  text-align: left;
  flex-grow: 1;
}

.press-content h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.press-content p {
  font-style: italic;
  color: var(--dark-gray);
  margin-bottom: var(--spacing-sm);
}

.press-date {
  display: block;
  color: var(--medium-gray);
  font-size: 0.9rem;
}

/* Events Section */
.events {
  background-color: var(--white);
}

.events-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.event-card {
  display: flex;
  background-color: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

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

.event-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100px;
  background: var(--primary-gradient);
  color: var(--white);
  padding: var(--spacing-md);
  text-align: center;
}

.event-date .day {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

.event-date .month {
  font-size: 1.2rem;
  font-weight: 600;
}

.event-details {
  flex-grow: 1;
  padding: var(--spacing-lg);
}

.event-details h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.event-location,
.event-time {
  color: var(--dark-gray);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.event-description {
  color: var(--dark-gray);
  margin-bottom: var(--spacing-md);
}

.event-action {
  margin-top: auto;
}

/* Events Calendar Section */
.events-calendar {
  background-color: var(--off-white);
}

.calendar-container {
  background-color: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
}

.calendar-header {
  background: var(--primary-gradient);
  color: var(--white);
  padding: var(--spacing-md);
}

.month-selector {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.current-month {
  margin: 0;
  font-size: 1.5rem;
}

.calendar-nav {
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0 var(--spacing-sm);
  transition: opacity var(--transition-normal);
}

.calendar-nav:hover {
  opacity: 0.8;
}

.calendar-grid {
  padding: var(--spacing-md);
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.calendar-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-gap: var(--spacing-sm);
}

.calendar-days span {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.calendar-days .event-day {
  background-color: var(--primary-light);
  color: var(--white);
  font-weight: 700;
}

.calendar-days .event-day:hover {
  background-color: var(--primary-color);
}

.calendar-days .prev-month-day,
.calendar-days .next-month-day {
  color: var(--medium-gray);
}

.calendar-legend {
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.legend-item {
  display: flex;
  align-items: center;
  margin-left: var(--spacing-md);
}

.event-indicator {
  width: 15px;
  height: 15px;
  background-color: var(--primary-light);
  border-radius: 50%;
  margin-right: var(--spacing-sm);
}

/* Contact Section */
.contact {
  background-color: var(--white);
}

.contact-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.contact-info {
  flex: 1;
  min-width: 300px;
}

.contact-info h3 {
  color: var(--primary-color);
  margin-top: var(--spacing-lg);
}

.contact-info h3:first-child {
  margin-top: 0;
}

.contact-info ul {
  margin-bottom: var(--spacing-lg);
}

.contact-info ul li {
  margin-bottom: var(--spacing-sm);
  color: var(--dark-gray);
}

.contact-info p {
  color: var(--dark-gray);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.social-links a {
  color: var(--primary-color);
  font-weight: 600;
  transition: color var(--transition-normal);
}

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

.contact-form {
  flex: 1;
  min-width: 300px;
  background-color: var(--off-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--dark);
}

input,
select,
textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--medium-gray);
  border-radius: var(--radius-sm);
  font-family: var(--body-font);
  font-size: 1rem;
  transition: border-color var(--transition-normal);
}

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

.toggle-switch {
  display: flex;
  align-items: center;
}

.toggle-switch input[type="checkbox"] {
  width: auto;
  margin-right: var(--spacing-sm);
}

/* Footer */
.footer {
  background-color: var(--dark);
  color: var(--white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-column {
  flex: 1;
  min-width: 200px;
}

.footer-column h3 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.footer-column h3::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 3px;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
}

.footer-column p {
  color: var(--light-gray);
  margin-bottom: var(--spacing-md);
}

.footer-column ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-column a {
  color: var(--light-gray);
  transition: color var(--transition-normal);
}

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

.footer .social-links {
  margin-top: var(--spacing-md);
}

.footer .social-links a {
  color: var(--light-gray);
  margin-right: var(--spacing-md);
  transition: color var(--transition-normal);
}

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

.certification {
  margin-top: var(--spacing-md);
  font-style: italic;
  color: var(--medium-gray);
}

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

.footer-bottom p {
  color: var(--medium-gray);
  margin: 0;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--white);
  max-width: 800px;
  width: 90%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  position: relative;
  padding: var(--spacing-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.close-modal {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dark-gray);
  transition: color var(--transition-normal);
}

.close-modal:hover {
  color: var(--primary-color);
}

/* Success Page */
.success-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: var(--spacing-xl);
}

.success-container {
  max-width: 600px;
  animation: fadeInUp 1s ease;
}

.success-icon {
  font-size: 5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
}

/* Privacy & Terms Pages */
.privacy-page,
.terms-page {
  padding-top: 100px;
}

.privacy-content,
.terms-content {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* About Page */
.about-page {
  padding-top: 100px;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

/* Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Styles */
@media (max-width: 991px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .hero {
    padding: 150px 0 100px;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
  }
  
  .timeline::before {
    left: 30px;
  }
  
  .timeline-item,
  .timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-left: 80px;
  }
  
  .timeline-marker {
    left: 30px;
  }
  
  .timeline-content {
    width: 100%;
  }
  
  .innovation-content {
    flex-direction: column;
  }
  
  .innovation-image {
    order: -1;
  }
  
  .event-card {
    flex-direction: column;
  }
  
  .event-date {
    width: 100%;
    padding: var(--spacing-sm);
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-sm);
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md) 0;
  }
  
  .main-nav.active {
    display: block;
  }
  
  .main-nav ul {
    flex-direction: column;
    align-items: center;
  }
  
  .main-nav li {
    margin: var(--spacing-sm) 0;
  }
  
  .burger-menu {
    display: flex;
  }
  
  .services-grid,
  .research-grid,
  .resources-grid,
  .press-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-container {
    flex-direction: column;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .btn {
    padding: 0.6rem 1.2rem;
  }
  
  h2::after {
    width: 60px;
  }
}