Below is the HTML and CSS snippet for reference:
* {
margin: 0;
padding: 0;
}
html, body {
height: 100%;
width: 100%;
}
header {
height: 100px;
background-color: #35424a;
border-bottom: #e8491d 5px solid;
}
h1 {
float: left;
margin-top: auto;
margin-bottom: auto;
color: white;
}
.acme {
color: #e8491d;
}
nav {
float: right;
margin-top: auto;
margin-bottom: auto;
}
li {
display: inline;
font-size: 150%;
padding: 0px 20px;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="style.css">
<title>Document</title>
</head>
<body>
<header>
<h1><span class="acme">Acme </span>Web Design</h1>
<nav>
<ul>
<li>HOME</li>
<li>ABOUT</li>
<li>SERVICES</li>
</ul>
</nav>
</header>
</body>
</html>The issue I encountered is with the h1 and nav elements where despite setting the top and bottom margins to auto and specifying a height of 100px for the header (105px including the border), the margin auto property does not seem to work as expected. As a troubleshooting step, I attempted to add
display: block;
however, this adjustment did not have any effect on the layout.