/* Particle background animation - Added to your existing code */
      .particles-background {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        pointer-events: none;
        background: #1a1a2e; /* Dark blue background for particles */
      }
      
      /* Ensure main content stays above particles */
      main {
        position: relative;
        z-index: 1;
      }
      
      /* Smooth scrolling for the page */
      html {
        scroll-behavior: smooth;
      }
      
      /* Add subtle fade-in animation for page content */
      article[data-page] {
        animation: fadeIn 0.5s ease-in-out;
      }
      
      @keyframes fadeIn {
        from { opacity: 0; transform: translateY(10px); }
        to { opacity: 1; transform: translateY(0); }
      }
      
      /* Back to top button */
      .back-to-top {
        position: fixed;
        bottom: 30px;
        right: 30px;
        width: 50px;
        height: 50px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 1.2rem;
        cursor: pointer;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      }
      
      .back-to-top.active {
        opacity: 1;
        visibility: visible;
      }
      
      .back-to-top:hover {
        transform: translateY(-5px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
      }