:root {
  --primary-dark: #0a0e17;
  --primary-blue: #0d47a1;
  --primary-blue-light: #1565c0;
  --accent-silver: #c0c5ce;
  --text-white: #ffffff;
  --text-gray: #a0a5ad;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.37);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--primary-dark);
  color: var(--text-white);
  line-height: 1.6;
  overflow-x: hidden;
}

#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-gray);
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-white);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.lang-switch {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-gray);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.lang-switch:hover {
  border-color: var(--text-white);
  color: var(--text-white);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-white);
  font-size: 1.5rem;
  cursor: pointer;
}

main {
  margin-top: 80px;
}

section {
  padding: 6rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.page {
  display: none;
  animation: fadeIn 0.5s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.hero-content {
  max-width: 900px;
}

.hero-badge {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 30px;
  color: var(--accent-silver);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-slogan {
  font-size: 1.8rem;
  color: var(--primary-blue-light);
  margin-bottom: 2rem;
  font-weight: 600;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-gray);
  margin-bottom: 3rem;
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 1rem 2.5rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
  color: var(--text-white);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(21, 101, 192, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--text-white);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: var(--glass-bg);
  border-color: var(--text-white);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2.5rem;
  transition: all 0.3s ease;
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary-blue-light);
  box-shadow: var(--glass-shadow);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.service-card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.service-card p {
  color: var(--text-gray);
  line-height: 1.8;
}

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

.about-text h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.about-text p {
  color: var(--text-gray);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

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

.stat-item {
  text-align: center;
  padding: 2rem;
  background: var(--glass-bg);
  border-radius: 12px;
  border: 1px solid var(--glass-border);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-blue-light);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-gray);
  font-size: 0.95rem;
}

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

.case-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.case-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-blue), #1a1a2e);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.case-content {
  padding: 2rem;
}

.case-tag {
  display: inline-block;
  padding: 0.3rem 1rem;
  background: rgba(13, 71, 161, 0.2);
  color: var(--primary-blue-light);
  border-radius: 20px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.case-content h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
}

.case-content p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.7;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.tech-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
}

.tech-item:hover {
  border-color: var(--primary-blue-light);
  transform: scale(1.05);
}

.tech-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.tech-item h4 {
  font-size: 1rem;
  color: var(--text-gray);
}

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

.contact-info h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.contact-info p {
  color: var(--text-gray);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

.contact-item-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item-text h4 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.contact-item-text p {
  color: var(--text-gray);
  margin: 0;
}

.contact-form {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 2.5rem;
}

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

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-white);
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

footer {
  background: var(--glass-bg);
  border-top: 1px solid var(--glass-border);
  padding: 3rem 2rem;
  text-align: center;
}

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

@media (max-width: 1024px) {
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-dark);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-slogan {
    font-size: 1.3rem;
  }

  section {
    padding: 4rem 1.5rem;
  }

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

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