:root {
  /* Color System */
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #0d9488;
  --accent-color: #f59e0b;
  --success-color: #059669;
  --warning-color: #d97706;
  --error-color: #dc2626;
  
  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Borders */
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: white;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--gray-600);
}

/* Utility Classes */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

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

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

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

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-normal);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo h2 {
  color: var(--primary-color);
  font-weight: var(--font-weight-bold);
  margin: 0;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  text-decoration: none;
  color: var(--gray-700);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-normal);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.bar {
  width: 25px;
  height: 3px;
  background-color: var(--gray-700);
  margin: 3px 0;
  transition: var(--transition-fast);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
  padding: 120px 0 var(--spacing-3xl);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.tech-card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  transform: translateY(20px);
  opacity: 0;
  animation: slideInUp 0.6s ease-out forwards;
}

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

/* About Section */
.about {
  padding: var(--spacing-3xl) 0;
  background-color: white;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.about-text h3 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
}

.about-text p {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.stat {
  text-align: center;
}

.stat h4 {
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.stat p {
  color: var(--gray-600);
  font-weight: var(--font-weight-medium);
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.value-card {
  background: var(--gray-50);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  border-left: 4px solid var(--primary-color);
}

.value-card h4 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-xs);
}

/* Services Section */
.services {
  padding: var(--spacing-3xl) 0;
  background-color: var(--gray-50);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.service-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(30px);
}

.service-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.service-card h3 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
}

.service-card p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.service-card ul {
  list-style: none;
  margin-top: var(--spacing-md);
}

.service-card li {
  padding: var(--spacing-xs) 0;
  color: var(--gray-600);
  position: relative;
  padding-left: var(--spacing-md);
}

.service-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success-color);
  font-weight: var(--font-weight-bold);
}

/* Portfolio Section */
.portfolio {
  padding: var(--spacing-3xl) 0;
  background-color: white;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.portfolio-item {
  background: white;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(30px);
}

.portfolio-item.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.portfolio-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.portfolio-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-overlay {
  text-align: center;
  color: white;
}

.portfolio-overlay h4 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

.portfolio-content {
  padding: var(--spacing-lg);
}

.portfolio-content h4 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.portfolio-tech {
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
}

/* Team Section */
.team {
  padding: var(--spacing-3xl) 0;
  background-color: var(--gray-50);
}

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

.team-member {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(30px);
}

.team-member.animate-in {
  opacity: 1;
  transform: translateY(0);
}

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

.member-photo {
  margin-bottom: var(--spacing-md);
}

.member-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin: 0 auto;
}

.team-member h4 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-xs);
}

.member-role {
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
}

.member-bio {
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Contact Section */
.contact {
  padding: var(--spacing-3xl) 0;
  background-color: white;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item h4 {
  color: var(--gray-900);
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.contact-form {
  background: var(--gray-50);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
}

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

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--border-radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 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 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background-color: var(--gray-900);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.footer-section p {
  color: var(--gray-300);
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
  color: var(--gray-300);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: white;
}

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

.social-link {
  color: var(--gray-300);
  text-decoration: none;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: white;
  background-color: var(--primary-color);
}

.footer-bottom {
  border-top: 1px solid var(--gray-700);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-bottom p {
  color: var(--gray-400);
  margin: 0;
}

/* Notifications */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  color: white;
  font-weight: var(--font-weight-medium);
  z-index: 10000;
  transform: translateX(400px);
  transition: transform var(--transition-normal);
}

.notification.show {
  transform: translateX(0);
}

.notification-success {
  background-color: var(--success-color);
}

.notification-error {
  background-color: var(--error-color);
}

.notification-info {
  background-color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg) 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.is-active .bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.is-active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.is-active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: var(--spacing-lg);
  }

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

  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .about-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .services-grid,
  .portfolio-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    justify-content: center;
  }

  .section-header h2 {
    font-size: 2rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

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

  .btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }

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

  .tech-grid {
    grid-template-columns: 1fr;
  }
}

/* Additional Animations */
@media (prefers-reduced-motion: no-preference) {
  .service-card,
  .portfolio-item,
  .team-member {
    transition: all var(--transition-normal);
  }

  .service-card:nth-child(1) { transition-delay: 0.1s; }
  .service-card:nth-child(2) { transition-delay: 0.2s; }
  .service-card:nth-child(3) { transition-delay: 0.3s; }
  .service-card:nth-child(4) { transition-delay: 0.4s; }
  .service-card:nth-child(5) { transition-delay: 0.5s; }
  .service-card:nth-child(6) { transition-delay: 0.6s; }

  .portfolio-item:nth-child(1) { transition-delay: 0.1s; }
  .portfolio-item:nth-child(2) { transition-delay: 0.2s; }
  .portfolio-item:nth-child(3) { transition-delay: 0.3s; }

  .team-member:nth-child(1) { transition-delay: 0.1s; }
  .team-member:nth-child(2) { transition-delay: 0.2s; }
  .team-member:nth-child(3) { transition-delay: 0.3s; }
  .team-member:nth-child(4) { transition-delay: 0.4s; }
}