#content { display: flex; }

		
* { box-sizing: border-box; margin: 0; }
body {
background: url("Miami-Dolphins-Popcorn-Box-Product-3.jpg") no-repeat center center fixed;
}
nav ul {
  list-style: none;  
  margin: 0;
  padding: 0;
}

nav li {
  display: inline-block;   
  margin-right: 1em;       
}