:root {
    --primary-dark: #0f0f23;
    --primary-light: #1a1a2e;
    --accent-blue: #00ffff;
    --accent-purple: #ff00ff;
    --accent-pink: #ff1493;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --transition-speed: 0.3s;
  }

  @font-face {
    font-family: 'Orbitron';
    src: url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&display=swap');
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
    padding: 0 5%;
  }

  .header {
    position: relative;
    padding: 2rem 0;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.1), transparent);
  }

  .header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 25%;
    width: 50%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
    box-shadow: 0 0 10px var(--accent-blue);
  }

  h1, h2, h3 {
    font-family: 'Orbitron', sans-serif;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.5);
  }

  h1 {
    font-size: 2.5rem;
    color: var(--accent-blue);
    letter-spacing: 2px;
  }

  h2 {
    font-size: 1.8rem;
    color: var(--accent-purple);
    margin-top: 3rem;
    position: relative;
    padding-bottom: 0.5rem;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  }

  h3 {
    font-size: 1.4rem;
    color: var(--accent-pink);
    margin-top: 2rem;
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background: rgba(15, 15, 35, 0.7);
    border-radius: 15px;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
  }

  .container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--accent-blue), var(--accent-purple), var(--accent-pink), var(--accent-blue));
    z-index: -1;
    border-radius: 16px;
    animation: borderGlow 4s linear infinite;
    background-size: 400%;
  }

  @keyframes borderGlow {
    0% { background-position: 0 0; }
    50% { background-position: 100% 0; }
    100% { background-position: 0 0; }
  }

  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .card {
    background: rgba(26, 26, 46, 0.8);
    border-radius: 10px;
    padding: 1.5rem;
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  }

  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 255, 255, 0.2);
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  }

  .card-title {
    font-family: 'Orbitron', sans-serif;
    color: var(--accent-blue);
    margin-bottom: 1rem;
    font-size: 1.3rem;
  }

  .card-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
  }

  .features {
    list-style: none;
  }

  .features li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
  }

  .features li::before {
    content: '✦';
    position: absolute;
    left: 0;
    color: var(--accent-pink);
  }

  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin: 3rem 0;
  }

  .gallery-image {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-speed) ease;
    position: relative;
  }

  .gallery-image:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--accent-purple);
  }

  .gallery-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

  .gallery-image:hover img {
    transform: scale(1.1);
  }

  .gallery-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 0, 255, 0.2));
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
  }

  .gallery-image:hover::after {
    opacity: 1;
  }

  pre {
    background: rgba(15, 15, 35, 0.9);
    border-left: 3px solid var(--accent-blue);
    border-radius: 5px;
    padding: 1.5rem;
    overflow-x: auto;
    margin: 2rem 0;
    position: relative;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent-blue);
    color: var(--primary-dark);
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    font-family: 'Orbitron', sans-serif;
    border-bottom-left-radius: 5px;
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--accent-blue);
    background: transparent;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
  }

  .note {
    background: rgba(0, 255, 255, 0.1);
    border-left: 3px solid var(--accent-blue);
    padding: 1rem;
    margin: 2rem 0;
    border-radius: 0 5px 5px 0;
  }

  .note p {
    margin-bottom: 0;
  }

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

  .particle {
    position: absolute;
    background: var(--accent-blue);
    border-radius: 50%;
    opacity: 0.5;
    animation: float linear infinite;
  }

  @keyframes float {
    0% { transform: translateY(0) translateX(0); opacity: 0; }
    50% { opacity: 0.7; }
    100% { transform: translateY(-100vh) translateX(100px); opacity: 0; }
  }

  .footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
  }

  .footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    width: 50%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.5), transparent);
  }

  @media (max-width: 768px) {
    .container {
      padding: 1.5rem;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    .grid {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 480px) {
    body {
      padding: 0 2%;
    }
    
    .container {
      padding: 1rem;
    }
    
    pre {
      padding: 1rem;
      font-size: 0.9rem;
    }
  }