:root {
    --primary: #1E272E;
    --secondary: #C0C0C0;
    --accent: #39FF14;
    --highlight: #FFD700;
    --gradient-start: #6F00FF;
    --gradient-end: #AA00FF;
    --text-light: #F5F5F5;
    --text-dark: #333333;
    --shadow: 0 10px 30px rgba(0,0,0,0.2);
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Montserrat', 'Roboto', sans-serif;
    line-height: 1.8;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    animation: gradientFlow 15s ease infinite;
    background-size: 400% 400%;
    overflow-x: hidden;
  }

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

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
  }

  header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
  }

  header::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: var(--accent);
    margin: 20px auto;
    border-radius: 2px;
  }

  h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-light);
  }

  h1 {
    font-size: 2.8rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
  }

  h2 {
    font-size: 2.2rem;
    position: relative;
    padding-bottom: 15px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--highlight);
    border-radius: 3px;
  }

  h3 {
    font-size: 1.8rem;
    margin-top: 2.5rem;
  }

  h4 {
    font-size: 1.4rem;
  }

  p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: rgba(255,255,255,0.9);
  }

  strong {
    color: var(--highlight);
  }

  .reference-banner {
    background: rgba(0,0,0,0.2);
    color: var(--text-light);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 40px;
    text-align: center;
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
  }

  .content-block {
    background: rgba(30, 39, 46, 0.8);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 60px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }

  .decorative-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    transition: var(--transition);
  }

  .decorative-img:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
  }

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 30px 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    color: var(--text-light);
    position: relative;
  }

  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: var(--primary);
    padding: 2px 10px;
    font-size: 0.8rem;
    border-bottom-left-radius: 4px;
  }

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

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin: 40px 0;
  }

  .nav-link {
    padding: 12px 25px;
    background: rgba(255,255,255,0.1);
    color: var(--text-light);
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.2);
  }

  .nav-link:hover {
    background: var(--accent);
    color: var(--primary);
    transform: translateY(-3px);
  }

  .tech-card {
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    border-left: 5px solid var(--highlight);
    transition: var(--transition);
  }

  .tech-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
  }

  .tech-card h4 {
    margin-top: 0;
    color: var(--highlight);
  }

  @media (max-width: 768px) {
    .container {
      padding: 20px 15px;
    }
    
    h1 {
      font-size: 2.2rem;
    }
    
    h2 {
      font-size: 1.8rem;
    }
    
    .content-block {
      padding: 25px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }