* {
    box-sizing: border-box;
  }
  
  /* Style the body */
  body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
  }
  
  /* Header/logo Title */
  header {
    padding: 10px;
    text-align: center;
    background: #1abc9c;
    color: white;
  }
  
  /* Increase the font size of the heading */
  header h1 {
    font-size: 40px;
  }
  
  /* Sticky navbar - toggles between relative and fixed, depending on the scroll position. It is positioned relative until a given offset position is met in the viewport - then it "sticks" in place (like position:fixed). The sticky value is not supported in IE or Edge 15 and earlier versions. However, for these versions the navbar will inherit default position */
  nav {
    overflow: hidden;
    background-color: #333;
    position: sticky;
    position: -webkit-sticky;
    top: 0;
  }
  
  /* Style the navigation bar links */
  nav a {
    float: left;
    display: block;
    color: white;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
  }
  
  
  /* Right-aligned link */
  nav a.right {
    float: right;
  }
  
  /* Change color on hover */
  nav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  /* Active/current link */
  nav a.active {
    background-color: #666;
    color: white;
  }
  
  /* Column container */
  .row {  
    display: -ms-flexbox; /* IE10 */
    display: flex;
    -ms-flex-wrap: wrap; /* IE10 */
    flex-wrap: wrap;
  }
  

  
  /* Main column */
  main {   
    -ms-flex: 70%; /* IE10 */
    flex: 70%;
    background-color: white;
    padding: 20px;
  }
  
  /* Fake image, just for this example */
  .fakeimg {
    background-color: #aaa;
    width: 100%;
    padding: 20px;
  }
  
  /* Footer */
  footer {
    padding: 20px;
    text-align: center;
    background: #ddd;
  }
  
  /* Responsive layout - when the screen is less than 700px wide, make the two columns stack on top of each other instead of next to each other */
  @media screen and (max-width: 700px) {
    .row {   
      flex-direction: column;
    }
  }
  
  /* Responsive layout - when the screen is less than 400px wide, make the navigation links stack on top of each other instead of next to each other */
  @media screen and (max-width: 400px) {
    nav a {
      float: none;
      width: 100%;
    }
  }

#banner {
    background-color: yellow;
    text-align: center;
}

header {
    background-image: url(christmas.jpg);
    background-repeat: no-repeat;
    /* Do not repeat the image */
    color: lightblue;
    background-size: cover;
    /* Resize the background image to cover the entire container */
    /*Comments: You may use your own image from local. Go to W3schools :  CSS : CSS Image-Sprites for more image from CSS.  (https://www.w3schools.com/css/css_image_sprites.asp ) You may use other format like below: background-position:left-side; */
}

#banner h1 {
    color: black;
}

#banner h2.author {
    color: black;
}

#banner p.homepage {
    background-color: blue;
}