/* layout.css */
header {
    background-color: #ffffff;
    color: #111;
    padding: 1rem 0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  }
  
  footer {
    background-color: #ffffff;
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
    color: #333;
    margin-top: 4rem;
  }
  
  @media (max-width: 768px) {
    .hero-layout {
      flex-direction: column;
      align-items: center;
      padding: 2rem 1rem;
    }
  
    .right-column, .left-column {
      max-width: 100%;
      text-align: center;
    }
  
    .grid {
      flex-direction: column;
      align-items: center;
    }
  
    nav a {
      display: inline-block;
      margin: 0.5rem;
    }
  }