lukecss.css

body {
    background-image: url('Galactus.jpg');
        background-repeat:no-repeat;
        background-position: center;
        background-position-y: -50px;

}
body{
    background-color: black;
}
body{ 
    margin: 0;
  font-size: 28px;
  font-family: Arial, Helvetica, sans-serif;
}

.header {
  background-color: #f1f1f1;
  padding: 20px;
  text-align: center;
}

#navbar {
  overflow: hidden;
  background-color: black;
}

#navbar a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

#navbar a:hover {
  background-color: #ddd;
  color: black;
}

#navbar a.active {
  background-color: #4CAF50;
  color: white;
}

.content {
  padding: 16px;
}

.sticky {
  position: fixed;
  top: 0;
  width: 100%;
}

.sticky + .content {
  padding-top: 30px;
}