/* Base Styles */
:root {
    --primary: #7c3aed;
    --primary-hover: #6d28d9;
    --primary-light: #ede9fe;
    --secondary: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow: 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);
    --radius: 0.5rem;
    --transition: all 0.3s ease;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    line-height: 1.6;
    background-color: var(--background);
  }
  
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  
  a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
  }
  
  ul {
    list-style: none;
  }
  
  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
  }
  
  section {
    padding: 5rem 0;
  }
  
  .section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
  }
  
  .badge {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
  }
  
  h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  p {
    margin-bottom: 1rem;
    color: var(--text-light);
  }
  
  /* Buttons */
 /* Base button styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

/* Large button styles */
.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

/* Primary button styles */
.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}
  .btn-primary:hover {
    background-color: var(--primary-hover);
  }
  
  .btn-outline {
    background-color: transparent;
    color: var(--text);
    border: 1px solid var(--border);
  }
  
  .btn-outline:hover {
    background-color: var(--border-light);
  }
  
  .btn-outline-light {
    background-color: transparent;
    color: white;
    border: 1px solid white;
  }
  
  .btn-outline-light:hover {
    background-color: white;
    color: var(--text);
  }
  
  .btn i {
    margin-left: 0.5rem;
  }
  
  /* Header */
  .header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
  }
  
  .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
  }
  
  .logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
  }
  
  .logo i {
    color: var(--primary);
    margin-right: 0.5rem;
  }
  
  .main-nav {
    display: none;
  }
  
  .main-nav ul {
    display: flex;
    gap: 1.5rem;
  }
  
  .main-nav a {
    font-size: 0.875rem;
    font-weight: 500;
  }
  
  .main-nav a:hover {
    color: var(--primary);
  }
  
  .mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 1.5rem;
    height: 1.25rem;
    background: transparent;
    border: none;
    cursor: pointer;
  }
  
  .mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text);
    transition: var(--transition);
  }
  
  .mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }
  
  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }
  
  /* Mobile Menu */
  .mobile-menu {
    position: fixed;
    top: 4rem;
    left: 0;
    width: 100%;
    height: calc(100vh - 4rem);
    background-color: var(--background);
    z-index: 99;
    padding: 2rem;
    transform: translateX(100%);
    transition: var(--transition);
  }
  
  .mobile-menu.active {
    transform: translateX(0);
  }
  
  .mobile-menu ul {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .mobile-menu a {
    font-size: 1.25rem;
    font-weight: 500;
    display: block;
  }
  
  .mobile-menu a:hover {
    color: var(--primary);
  }
  
  .mobile-cta {
    margin-top: 1rem;
    width: 100%;
    text-align: center;
  }
  
  /* Hero Section */
  .hero {
    padding: 4rem 0;
    background-color: var(--background-alt);
  }
  
  .hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
  }
  
  .hero-text h1 {
    margin-bottom: 1.5rem;
  }
  
  .hero-tagline {
    font-weight: 500;
    font-size: 1.125rem;
    color: var(--primary);
    margin-bottom: 2rem;
  }
  
  .hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
  }
  
  .hero-image {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
  }
  
  /* Services Section */
  .services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .service-card {
    background-color: var(--background);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: var(--transition);
  }
  
  .service-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-5px);
  }
  
  .service-icon {
    width: 3rem;
    height: 3rem;
    background-color: var(--primary-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
  }
  
  .service-icon i {
    color: var(--primary);
    font-size: 1.5rem;
  }
  
  .service-link {
    color: var(--primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
  }
  
  .service-link i {
    margin-left: 0.25rem;
    font-size: 0.75rem;
  }
  
  /* About Section */
  .about {
    background-color: var(--background-alt);
  }
  
  .about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
  }
  
  .about-tagline {
    font-weight: 500;
    font-size: 1.125rem;
    color: var(--primary);
    margin-bottom: 2rem;
  }
  
  .mission-vision {
    margin: 2rem 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .mission h3, .vision h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
  }
  
  .mission h3 i, .vision h3 i {
    color: var(--primary);
  }
  
  .about-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  .about-image {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
  }
  
  /* Portfolio Section */
  .portfolio {
    background-color: var(--background);
  }
  
  .portfolio-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
  }
  
  .filter-btn {
    background-color: transparent;
    border: none;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius);
    transition: var(--transition);
  }
  
  .filter-btn:hover, .filter-btn.active {
    background-color: var(--primary);
    color: white;
  }
  
  .portfolio-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .portfolio-item {
    border-radius: var(--radius);
    overflow: hidden;
  }
  
  .portfolio-image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
  }
  
  .portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }
  
  .portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
  }
  
  .portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
  }
  
  .portfolio-item:hover .portfolio-overlay {
    opacity: 1;
  }
  
  .portfolio-info {
    text-align: center;
    padding: 1.5rem;
    color: white;
  }
  
  .portfolio-info h3 {
    margin-bottom: 0.5rem;
  }
  
  .portfolio-info p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1.5rem;
  }
  
  /* Publications Section */
  .publications {
    background-color: var(--background-alt);
  }
  
  .publications-content {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .publication-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    background-color: var(--background);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
  }
  
  .publication-image {
    max-width: 300px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 0;
  }
  
  .publication-info {
    padding: 0 1.5rem 1.5rem;
    text-align: center;
  }
  
  .publication-info h3 {
    margin-bottom: 1rem;
  }
  
  .publication-info .btn {
    margin-top: 1rem;
  }
  
  /* Testimonials Section */
  /* Testimonials Section */
.testimonials {
  padding: 4rem 0;
  background-color: var(--background-light);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.testimonial-header {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  gap: 1rem;
}

.testimonial-avatar img {
  border-radius: 50%;
  width: 60px;
  height: 60px;
}

.testimonial-author h3 {
  margin: 0;
  font-size: 1.2rem;
}

.testimonial-author p {
  margin: 0;
  font-size: 0.9rem;
  color: #666;
}

.testimonial-content {
  margin: 1rem 0;
  font-size: 1rem;
  color: #333;
}

.testimonial-rating i {
  color: #f39c12;
}
  
  /* Contact Section */
  .contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .contact-card {
    background-color: var(--background);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
  }
  
  .contact-card:hover {
    box-shadow: var(--shadow);
  }
  
  .contact-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
  }
  
  .contact-card h3 {
    margin-bottom: 1rem;
  }
  
  .contact-card p {
    margin-bottom: 0.5rem;
  }
  
  .contact-card a:hover {
    color: var(--primary);
  }
  
  .contact-card .social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
  }
  
  .contact-form-container {
    background-color: var(--background);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  
  .form-group {
    margin-bottom: 1.5rem;
  }
  
  .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
  }
  
  .form-group input,
  .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
  }
  
  .form-group input:focus,
  .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
  }
  
  /* CTA Section */
  .cta {
    text-align: center;
    background-color: var(--background-alt);
  }
  
  .cta-action {
    max-width: 400px;
    margin: 0 auto;
  }
  
  .cta-note {
    font-size: 0.875rem;
    margin-top: 0.5rem;
  }
  
  /* Footer */
  .footer {
    background-color: var(--secondary);
    color: white;
    padding: 4rem 0 2rem;
  }
  
  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
  }
  
  .footer-col h3 {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    color: white;
  }
  
  .footer-col p, .footer-col address p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
  }
  
  .social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
  }
  
  .social-links a {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
  }
  
  .social-links a:hover {
    background-color: var(--primary);
  }
  
  .footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .footer-col ul a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
  }
  
  .footer-col ul a:hover {
    color: white;
  }
  
  .footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
    margin-bottom: 0;
  }
  
  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
  
  .footer-links a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
    transition: var(--transition);
  }
  
  .footer-links a:hover {
    color: white;
  }
  
  /* Media Queries */
  @media (min-width: 640px) {
    h1 {
      font-size: 3rem;
    }
    
    h2 {
      font-size: 2.25rem;
    }
    
    .hero-buttons {
      flex-direction: row;
    }
    
    .about-buttons {
      flex-direction: row;
    }
    
    .services-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-info {
      grid-template-columns: repeat(3, 1fr);
    }
    
    .publication-card {
      grid-template-columns: 1fr 2fr;
    }
    
    .publication-image {
      padding: 1.5rem;
    }
    
    .publication-info {
      padding: 1.5rem;
      text-align: left;
    }
    
    .footer-bottom {
      flex-direction: row;
      justify-content: space-between;
      align-items: center;
    }
  }
  
  @media (min-width: 768px) {
    .header .btn {
      display: inline-flex;
    }
    
    .main-nav {
      display: flex;
    }
    
    .mobile-menu-btn {
      display: none;
    }
    
    .hero-content {
      grid-template-columns: 1fr 1fr;
    }
    
    .about-content {
      grid-template-columns: 1fr 1fr;
    }
    
    .mission-vision {
      grid-template-columns: 1fr 1fr;
    }
    
    .contact-content {
      grid-template-columns: 1fr 1fr;
    }
    
    .footer-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (min-width: 1024px) {
    .services-grid {
      grid-template-columns: repeat(3, 1fr);
    }
    
    .portfolio-grid {
      grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  }