:root {
    --primary: #0d47a1;
    --secondary: #512da8;
    --accent: #00e676;
    --highlight: #2979ff;
    --text: #ffffff;
    --bg: #121212;
    --card-bg: #1a237e;
    --font-main: 'Roboto', sans-serif;
    --font-heading: 'Orbitron', sans-serif;
  }

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

  body {
    font-family: var(--font-main);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(13, 71, 161, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
  }

  .header:hover {
    background: rgba(13, 71, 161, 1);
  }

  .nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
  }

  .nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    letter-spacing: 2px;
    background: linear-gradient(45deg, var(--highlight), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
  }

  .nav-menu {
    display: flex;
    gap: 30px;
  }

  .nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: all 0.3s ease;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
  }

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

  .hero {
    min-height: 600px;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(41, 121, 255, 0.2) 0%, transparent 50%);
    z-index: -1;
  }

  .hero-content {
    max-width: 600px;
  }

  .hero-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--highlight), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
  }

  .hero-image {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    max-width: 600px;
    display: flex;
    justify-content: center;
  }

  .hero-image img {
    width: 100%;
    max-width: 400px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: all 0.5s ease;
  }

  .hero-image img:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
  }

  .section {
    padding: 80px 0;
    position: relative;
  }

  .section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
  }

  .section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--highlight), var(--accent));
    border-radius: 3px;
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
  }

  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--highlight), var(--accent));
  }

  .card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

  .card-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--accent);
  }

  .card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
  }

  .card-image:hover {
    transform: scale(1.05);
  }

  article {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background: rgba(26, 35, 126, 0.2);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }

  article h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin: 40px 0 20px;
    color: var(--accent);
    position: relative;
    padding-left: 20px;
  }

  article h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 5px;
    background: linear-gradient(to bottom, var(--highlight), var(--accent));
    border-radius: 5px;
  }

  article p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  article color {
    color: var(--accent);
    font-weight: bold;
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    border-left: 4px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent);
  }

  .footer {
    background: var(--primary);
    padding: 50px 0 20px;
    text-align: center;
    position: relative;
  }

  .footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--highlight), var(--accent));
  }

  .footer-text {
    margin-top: 20px;
    opacity: 0.8;
    font-size: 0.9rem;
  }

  .particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
  }

  .particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--accent);
    border-radius: 50%;
    animation: moveParticle linear infinite;
  }

  @keyframes moveParticle {
    0% {
      transform: translateY(0) translateX(0);
      opacity: 0;
    }
    10% {
      opacity: 1;
    }
    90% {
      opacity: 1;
    }
    100% {
      transform: translateY(-100vh) translateX(100vw);
      opacity: 0;
    }
  }

  .data-flow {
    position: relative;
    height: 2px;
    margin: 30px 0;
    background: rgba(41, 121, 255, 0.2);
    overflow: hidden;
  }

  .data-flow::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--highlight), transparent);
    animation: flow 3s linear infinite;
  }

  @keyframes flow {
    0% {
      transform: translateX(-100%);
    }
    100% {
      transform: translateX(100%);
    }
  }

  @media (max-width: 992px) {
    .hero {
      flex-direction: column;
      text-align: center;
      padding-top: 150px;
    }
    
    .hero-content {
      max-width: 100%;
      margin-bottom: 50px;
    }
    
    .hero-image {
      position: relative;
      transform: none;
      width: 100%;
      max-width: 500px;
      margin: 0 auto;
    }
  }

  @media (max-width: 768px) {
    .nav {
      flex-direction: column;
      padding: 15px;
    }
    
    .nav-menu {
      margin-top: 20px;
      flex-wrap: wrap;
      justify-content: center;
      gap: 15px;
    }
    
    .hero-title {
      font-size: 2.2rem;
    }
    
    .section-title {
      font-size: 2rem;
    }
    
    article h2 {
      font-size: 1.5rem;
    }
  }

  @media (max-width: 480px) {
    .hero-title {
      font-size: 1.8rem;
    }
    
    .section-title {
      font-size: 1.5rem;
    }
    
    .grid {
      grid-template-columns: 1fr;
    }
  }

  .reference {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    z-index: 1000;
  }