/* Responsive Design */
@media (max-width: 768px) {
  /* Header */
  header .container {
    flex-direction: column;
    padding: 15px 0;
  }

  .logo {
    margin-bottom: 15px;
  }

  nav ul {
    margin: 15px 0;
  }

  nav ul li {
    margin: 0 10px;
  }

  .language-switch {
    margin-top: 15px;
  }

  /* Hero Section */
  .hero {
    padding: 60px 0;
  }

  .hero h2 {
    font-size: 2rem;
  }

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

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 80%;
    text-align: center;
  }

  /* Features Section */
  .features {
    padding: 50px 0;
  }

  .features h2 {
    font-size: 1.8rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card {
    padding: 20px;
  }

  /* Footer */
  footer {
    padding: 40px 0 15px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  /* Header */
  header .container {
    flex-direction: column;
    padding: 15px 0;
  }

  .logo {
    margin-bottom: 15px;
  }

  nav ul {
    margin: 15px 0;
  }

  nav ul li {
    margin: 0 10px;
  }

  .language-switch {
    margin-top: 15px;
  }

  /* Hero Section */
  .hero {
    padding: 60px 0;
  }

  .hero h2 {
    font-size: 2rem;
  }

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

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 80%;
    text-align: center;
  }

  /* Features Section */
  .features {
    padding: 50px 0;
  }

  .features h2 {
    font-size: 1.8rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .feature-card {
    padding: 20px;
  }

  /* About Page */
  .team-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .team-member {
    padding: 20px;
  }

  .values-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .value-item {
    padding: 20px;
  }

  /* Projects Page */
  .projects-filter {
    justify-content: center;
  }

  .filter-btn {
    padding: 8px 15px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .oss-projects {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .oss-project {
    padding: 20px;
  }

  /* Contact Page */
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .map-container {
    height: 300px;
  }

  /* Footer */
  footer {
    padding: 40px 0 15px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  .container {
    width: 95%;
  }

  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }

  nav ul li {
    margin: 5px;
  }

  .hero h2 {
    font-size: 1.7rem;
  }

  .feature-card {
    padding: 15px;
  }

  .btn {
    width: 100%;
  }

  .projects-filter {
    gap: 10px;
  }

  .filter-btn {
    padding: 6px 12px;
    font-size: 0.9rem;
  }

  .contact-form .btn {
    width: 100%;
  }

  .map-container {
    height: 250px;
  }
  
  /* 404 Page */
  .not-found {
    padding: 60px 0;
  }
  
  .not-found-content h1 {
    font-size: 5rem;
  }
  
  .not-found-content h2 {
    font-size: 2rem;
  }
  
  .not-found-content p {
    font-size: 1rem;
  }
  
  /* Download Page */
  .download-links {
    flex-direction: column;
    align-items: center;
  }
  
  .installation-guide {
    padding: 20px;
  }
  
  .step {
    flex-direction: column;
  }
}