:root {
  /* Tetrad color scheme */
  --primary-color: #1e56a0;
  --primary-dark: #163a6c;
  --primary-light: #3a7dd4;
  --secondary-color: #a01e56;
  --secondary-dark: #6c163a;
  --secondary-light: #d43a7d;
  --accent1-color: #56a01e;
  --accent1-dark: #3a6c16;
  --accent1-light: #7dd43a;
  --accent2-color: #a0561e;
  --accent2-dark: #6c3a16;
  --accent2-light: #d47d3a;
  
  /* Text colors */
  --text-dark: #2a2a2a;
  --text-light: #ffffff;
  --text-muted: #6b7280;
  
  /* Background colors */
  --bg-light: #f5f7fa;
  --bg-white: #ffffff;
  --bg-dark: #1f2937;
  
  /* Card and UI element colors */
  --card-bg: #ffffff;
  --card-shadow: rgba(0, 0, 0, 0.1);
  --card-border: rgba(0, 0, 0, 0.05);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  
  /* Border radius */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Container max width */
  --container-max-width: 1200px;
  --container-padding: 2rem;
}

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

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

body {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--bg-light);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

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

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

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

ul, ol {
  list-style-position: inside;
  margin-bottom: var(--spacing-md);
}

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

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

/* Section styles */
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--primary-color);
  margin: var(--spacing-sm) auto;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Button styles */
.btn {
  display: inline-block;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all var(--transition-medium);
  font-size: 0.9rem;
  border: none;
  box-shadow: var(--shadow-sm);
}

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

.primary-btn:hover {
  background-color: var(--primary-dark);
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.secondary-btn:hover {
  background-color: var(--secondary-dark);
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.course-btn, .submit-btn {
  background-color: var(--accent1-color);
  color: var(--text-light);
  width: 100%;
  margin-top: var(--spacing-sm);
}

.course-btn:hover, .submit-btn:hover {
  background-color: var(--accent1-dark);
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

button, input[type='submit'] {
  cursor: pointer;
  font-family: inherit;
}

/* Header */
.site-header {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-medium);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

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

.main-nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.main-nav a {
  color: var(--text-dark);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

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

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

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

.hamburger-menu span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-dark);
  margin-bottom: 5px;
  transition: all var(--transition-medium);
}

/* Hero Section */
.hero {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--text-light);
  padding: 180px 0 100px;
  position: relative;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-light);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

/* Courses Section */
.courses-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-white);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.course-card {
  display: flex;
  flex-direction: column;
  background-color: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  height: 100%;
}

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

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

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

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

.card-content {
  padding: var(--spacing-md);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

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

.progress-container {
  margin: var(--spacing-sm) 0;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 5px;
  font-weight: 500;
  font-size: 0.9rem;
}

.progress-bar {
  height: 6px;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--accent1-color);
  border-radius: 3px;
  transition: width var(--transition-slow);
}

.course-details {
  display: flex;
  justify-content: space-between;
  margin: var(--spacing-sm) 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Benefits Section */
.benefits-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-light);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.benefit-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-md);
  background-color: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

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

.benefit-icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--spacing-sm);
  display: flex;
  justify-content: center;
  align-items: center;
}

.benefit-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

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

/* History Section */
.history-section {
  padding: var(--spacing-xl) 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--text-light);
}

.history-section .section-title {
  color: var(--text-light);
}

.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 6px;
  background-color: var(--primary-light);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -3px;
  border-radius: 3px;
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  width: 50%;
  animation-duration: 1s;
  animation-fill-mode: both;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: var(--secondary-color);
  border-radius: 50%;
  top: 24px;
  z-index: 1;
}

.left {
  left: 0;
}

.right {
  left: 50%;
}

.left::after {
  right: -10px;
}

.right::after {
  left: -10px;
}

.timeline-content {
  padding: var(--spacing-md);
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  color: var(--text-dark);
}

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

/* Resources Section */
.resources-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-white);
}

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

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

.resource-card:hover {
  transform: translateY(-5px);
}

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

.resource-links {
  list-style: none;
  margin-top: var(--spacing-sm);
}

.resource-links li {
  margin-bottom: 8px;
}

.resource-links a {
  display: inline-block;
  position: relative;
  padding-left: 20px;
  transition: color var(--transition-fast);
}

.resource-links a::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  transition: transform var(--transition-fast);
}

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

.resource-links a:hover::before {
  transform: translateX(5px);
}

/* Testimonials Section */
.testimonials-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-light);
}

.testimonials-slider {
  max-width: 1000px;
  margin: 0 auto;
  overflow: hidden;
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
  .testimonial-card {
    flex-direction: row;
    align-items: flex-start;
  }
}

.testimonial-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .testimonial-image {
    margin-right: var(--spacing-md);
    margin-bottom: 0;
  }
}

.testimonial-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.testimonial-content {
  flex-grow: 1;
}

.testimonial-content p {
  margin-bottom: var(--spacing-sm);
  font-style: italic;
  position: relative;
  padding: 0 var(--spacing-sm);
}

.testimonial-content p::before,
.testimonial-content p::after {
  content: '"';
  font-size: 2rem;
  color: var(--primary-light);
  line-height: 0;
  position: absolute;
}

.testimonial-content p::before {
  left: 0;
  top: 30px;
}

.testimonial-content p::after {
  content: '"';
  right: 0;
  bottom: 0;
}

.testimonial-author {
  text-align: right;
}

.testimonial-author h4 {
  margin-bottom: 5px;
  color: var(--primary-dark);
}

.testimonial-author p {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.9rem;
}

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

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

.career-card {
  display: flex;
  flex-direction: column;
  background-color: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-medium);
  height: 100%;
}

.career-card:hover {
  transform: translateY(-5px);
}

.career-card .card-image {
  height: 230px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

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

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

.career-card .card-content {
  padding: var(--spacing-md);
  flex-grow: 1;
}

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

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--spacing-sm);
}

.skill-tags span {
  padding: 5px 10px;
  background-color: rgba(30, 86, 160, 0.1);
  color: var(--primary-dark);
  border-radius: var(--border-radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
}

/* FAQ Section */
.faq-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--bg-light);
}

.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: var(--spacing-sm);
  background-color: var(--card-bg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  padding: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: rgba(30, 86, 160, 0.05);
}

.faq-question h3 {
  margin: 0;
  font-size: 1.2rem;
  color: var(--primary-dark);
}

.toggle-icon {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  transition: transform var(--transition-medium);
}

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

.faq-answer {
  padding: 0 var(--spacing-md);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-medium);
}

.faq-item.active .faq-answer {
  padding: 0 var(--spacing-md) var(--spacing-md);
  max-height: 500px;
}

/* Contact Section */
.contact-section {
  padding: var(--spacing-xl) 0;
  color: var(--text-light);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.contact-section .section-title {
  color: var(--text-light);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 992px) {
  .contact-content {
    grid-template-columns: 1fr 1fr;
  }
}

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

.contact-details {
  margin-top: var(--spacing-md);
}

.contact-item {
  margin-bottom: var(--spacing-md);
}

.contact-item h3 {
  color: var(--text-light);
  margin-bottom: 5px;
  font-size: 1.2rem;
}

.contact-item p {
  margin-bottom: 5px;
}

.contact-form-container {
  background-color: rgba(255, 255, 255, 0.95);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.contact-form-container h3 {
  color: var(--primary-dark);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.contact-form {
  display: grid;
  gap: var(--spacing-sm);
}

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

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--border-radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(30, 86, 160, 0.2);
}

.form-checkbox {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.form-checkbox input {
  margin-right: 10px;
  width: auto;
}

.form-checkbox label {
  margin-bottom: 0;
}

/* Footer */
.site-footer {
  background-color: var(--bg-dark);
  color: var(--text-light);
  padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.footer-content {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-logo {
  margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
  .footer-logo {
    flex-basis: 25%;
  }
}

.footer-logo h2 {
  color: var(--text-light);
  margin-bottom: var(--spacing-xs);
  font-size: 1.75rem;
}

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

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .footer-links {
    flex-basis: 70%;
  }
}

.footer-column h3 {
  color: var(--text-light);
  margin-bottom: var(--spacing-sm);
  font-size: 1.2rem;
}

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

.footer-column li {
  margin-bottom: 8px;
}

.footer-column a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
  text-decoration: none;
}

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

.footer-column p {
  color: var(--text-muted);
  margin-bottom: 5px;
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.social-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
  margin-right: var(--spacing-sm);
  position: relative;
}

.social-links a:hover {
  color: var(--text-light);
}

.social-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--text-light);
  transition: width var(--transition-medium);
}

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

.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(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Modal Window */
.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 {
  position: relative;
  background-color: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  max-height: 80vh;
  overflow-y: auto;
}

.close-modal {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-dark);
}

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

.success-content {
  max-width: 700px;
  padding: var(--spacing-lg);
  background-color: var(--bg-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.success-icon {
  color: var(--accent1-color);
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
}

/* Privacy and Terms pages */
.privacy-page, .terms-page {
  padding-top: 100px;
  padding-bottom: var(--spacing-xl);
}

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

/* Media Queries */
@media (max-width: 992px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.8rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  .header-inner {
    padding: 0.75rem 0;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg-white);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-sm) 0;
  }

  .main-nav.active {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
  }

  .main-nav li {
    margin: 0;
  }

  .main-nav a {
    display: block;
    padding: 0.75rem var(--spacing-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }

  .main-nav a::after {
    display: none;
  }

  .hamburger-menu {
    display: flex;
  }

  .hero {
    padding: 150px 0 80px;
  }

  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .timeline::after {
    left: 31px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 0;
  }

  .left::after, .right::after {
    left: 15px;
  }

  .right {
    left: 0;
  }
}

@media (max-width: 576px) {
  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.3rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.5rem;
  }
}

/* Animation Classes */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from { transform: translateX(-50px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInRight {
  from { transform: translateX(50px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInUp {
  from { transform: translateY(50px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

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

.animate-fade-in {
  animation: fadeIn 1s ease-out;
}

.animate-slide-left {
  animation: slideInLeft 1s ease-out;
}

.animate-slide-right {
  animation: slideInRight 1s ease-out;
}

.animate-slide-up {
  animation: slideInUp 1s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}