:root {
    --primary: linear-gradient(135deg, #4A90E2, #9013FE);
    --secondary: rgba(255, 255, 255, 0.1);
    --accent: #FF8C00;
    --text: #fff;
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --border: 1px solid rgba(255, 255, 255, 0.18);
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    color: var(--text);
    background: var(--primary);
    line-height: 1.6;
    overflow-x: hidden;
  }

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

  header {
    text-align: center;
    padding: 60px 0;
    position: relative;
    overflow: hidden;
  }

  header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary);
    z-index: -1;
  }

  .header-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    background: var(--secondary);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: var(--shadow);
    border: var(--border);
    transform: perspective(1000px) rotateX(5deg);
    transition: transform 0.5s ease;
  }

  .header-content:hover {
    transform: perspective(1000px) rotateX(0deg);
  }

  h1, h2, h3, h4 {
    margin-bottom: 20px;
    font-weight: 500;
  }

  h1 {
    font-size: 2.5rem;
    background: linear-gradient(to right, #fff, #ddd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  h2 {
    font-size: 1.9rem;
    margin-top: 40px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
  }

  h3 {
    font-size: 1.6rem;
    margin-top: 30px;
    color: rgba(255,255,255,0.9);
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
  }

  .glass-card {
    background: var(--secondary);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    border: var(--border);
    padding: 30px;
    margin: 30px 0;
    transition: transform 0.3s ease;
  }

  .glass-card:hover {
    transform: translateY(-5px);
  }

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

  .image-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
    aspect-ratio: 1/1;
  }

  .image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

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

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

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
    border-left: 3px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    color: #f8f8f2;
  }

  .language-css {
    display: block;
    white-space: pre;
  }

  .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);
    border-radius: 30px;
    text-decoration: none;
    color: white;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid rgba(255,255,255,0.2);
  }

  .nav-link:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-3px);
  }

  .reference {
    text-align: center;
    padding: 20px;
    background: rgba(0,0,0,0.2);
    margin-top: 60px;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
  }

  @media (max-width: 768px) {
    .header-content {
      padding: 30px 20px;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.6rem;
    }
    
    h3 {
      font-size: 1.3rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }