html {
    scroll-behavior: smooth;
  }
  #nav-bar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #f8f9fa;
    padding: 10px;
    display: flex;
    justify-content: space-around;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
  }
  #nav-bar nav-link {
    text-decoration: none;
    color: black;
  }
  
  body {
    margin-top: 60px;
    font-family: Arial, sans-serif;
  }
  #header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  #header-img {
    width: 100%;  
    max-width: 800px;
    height: auto; 
    display: block; 
    margin: 0 auto;
  }
  @media (max-width: 768px) {
    #nav-bar {
      flex-direction: column;
      align-items: center;
    }
  
    #video {
      width: 100%;
      height: auto;
    }
    section {
      text-align: centre;
      max-width: 800px;
      margin: 50 auto;
      padding: 20px;
    }
  }