:root {
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #10b981;
  --accent-color: #f59e0b;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-dark: #111827;
  --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --border-color: #e5e7eb;
  --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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

[data-theme="dark"] {
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-light: #9ca3af;
  --bg-primary: #1f2937;
  --bg-secondary: #111827;
  --bg-dark: #030712;
  --border-color: #374151;
}

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

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

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

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

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

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

ul {
  list-style: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  font-weight: 500;
  font-size: 0.95rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

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

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

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

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

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  background: var(--bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
}

  .logo {
    width: 200px;
    height: auto;
    max-height: 40px;
    object-fit: contain;
  }

.brand-text {
  display: flex;
  align-items: center;
}

.brand-highlight {
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 90px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  opacity: 0.05;
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 25% 25%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.title-line {
  display: block;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease-out forwards;
}

.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }
.title-line:nth-child(3) { animation-delay: 0.3s; }

.title-line.highlight {
  background: var(--bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.6;
  opacity: 0;
  animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 300px;
}

.tech-item {
  aspect-ratio: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary-color);
  transition: all var(--transition-base);
  animation: pulse 3s ease-in-out infinite;
}

.tech-item:nth-child(even) { animation-delay: 1s; }

.tech-item:hover {
  transform: translateY(-5px) scale(1.1);
  background: rgba(37, 99, 235, 0.1);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
}

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

.services {
  padding: 6rem 0;
  background: var(--bg-secondary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--bg-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover::before {
  transform: scaleX(1);
}

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

.service-icon {
  width: 60px;
  height: 60px;
  background: var(--bg-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  margin-bottom: 1.5rem;
}

.service-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.service-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.service-features {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.service-features i {
  color: var(--secondary-color);
  font-size: 0.8rem;
}

.about {
  padding: 6rem 0;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text {
  max-width: 600px;
}

.about-description {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.tech-stack h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tech-badge {
  background: var(--bg-gradient);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  font-weight: 500;
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.clients {
  padding: 6rem 0;
  background: var(--bg-secondary);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.client-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-color);
  text-align: center;
}

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

.client-logo {
  width: 80px;
  height: 80px;
  background: var(--bg-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  margin: 0 auto 1.5rem;
}

.client-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.client-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.client-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.client-link:hover {
  gap: 0.75rem;
}

.contact {
  padding: 6rem 0;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-item i {
  width: 40px;
  height: 40px;
  background: var(--bg-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.contact-item div {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 0.25rem;
}

.contact-item a {
  color: var(--text-primary);
  font-weight: 500;
}

.social-links h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.social-icons {
  display: flex;
  gap: 1rem;
}

.social-icon {
  width: 40px;
  height: 40px;
  background: var(--bg-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: all var(--transition-fast);
}

.social-icon:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.form {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form input,
.form select,
.form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.footer {
  background: var(--bg-dark);
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-brand {
  max-width: 400px;
}

  .footer-logo {
    width: 220px;
    height: auto;
    max-height: 45px;
    object-fit: contain;
    margin-bottom: 1rem;
  }

.footer-brand p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.footer-section h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.8);
}

.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--bg-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 999;
}

.scroll-to-top.show {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.notification {
  position: fixed;
  top: 100px;
  right: 20px;
  background: white;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  transform: translateX(100%);
  transition: all var(--transition-base);
  z-index: 1001;
  max-width: 400px;
  border-left: 4px solid var(--secondary-color);
}

.notification.show {
  opacity: 1;
  transform: translateX(0);
}

.notification-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}

.notification-content i {
  color: var(--secondary-color);
  font-size: 1.25rem;
}

.notification-message {
  color: var(--text-primary);
  font-weight: 500;
}

.notification-close {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: 4px;
  transition: color var(--transition-fast);
}

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 90px;
    left: -100%;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-base);
    gap: 1.5rem;
  }

  .nav-toggle {
    display: flex;
  }

  .brand-link {
    gap: 0.5rem;
  }

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

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .nav-toggle.active .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

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

  .tech-grid {
    max-width: 250px;
  }

  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 0.75rem;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .service-card,
  .client-card,
  .form {
    padding: 1.5rem;
  }

  .section-title {
    margin-bottom: 0.5rem;
  }

  .section-subtitle {
    margin-bottom: 2rem;
    font-size: 1rem;
  }

.logo {
  width: 400px;
  height: auto;
  max-height: 70px;
  object-fit: contain;
}

  .nav-container {
    height: 90px;
  }

  .hero {
    padding-top: 90px;
  }
}