Navigation Menu HTML: 
<nav id="mobileMenu"></nav>
        <nav id="navMenu">
            <ul>
                <li><a href="">Services</a></li>
                <li><a href="pages/codeSnippets.html">Code Snippets</a></li>
                <li><a href="https://rwd-examples.hiddentreecomputing.com/">RWD-Examples</a></li>
                <li><a href="#">About Me</a>
                    <ul>
                        <li><a href="pages/contact.html">Contact Us</a></li>
                        <li><a href="">Resume</a></li>
                        <li><a href="pages/otherProjects.html">Other Projects</a></li>
                    </ul>
                </li>
            </ul>
        </nav>

Navigation CSS: 
//This is in addition to other styles on the page
 /*Main Nav*/
#mobileMenu {
    display: block; 
    position: -webkit-sticky;
    position: sticky;
    top: 0%;
    width: 100%;    
}
#navMenu {
    display: none;
    position: -webkit-sticky;
    position: sticky;
    top: 0%;
    width: 100%; 
}
#navMenu ul{
    display: flex;
    list-style-type: none;
    margin: 0;
	padding: 0;
}
#navMenu ul li {
    flex: 1;
    position: relative;
    transition: flex-grow 0.3s ease-in-out;
}
#navMenu ul li a {
    min-height: 5px;
    max-height: 40px;
    font-size: 1.5rem;
    display: block;
    text-align: center;
    text-decoration: none;
    background-color: #2E1A15;
    color: #FF8A65;
    padding: 10px 0px;
    font-weight: bold;
    transition: all 0.3s ease-in;
    border: 2px solid #2E1A15;
    box-shadow: 0 6px 8px rgba(0,0,0,0.1);
}
#navMenu ul ul {
    padding: 0;
    margin: 0;
    display: none;
    position: absolute;
    top: 100%;
    width: 100%;
    flex-direction: column;  
}
#navMenu ul ul li {
    justify-content: stretch; 
}
#navMenu ul ul li a {
    display: block;
    color: #FF8A65;
    text-decoration: none;
    white-space: nowrap;
}
#navMenu ul li a:hover {
    background-color:#FF8A65;
    color: #2E1A15;
    font-style: italic;
}
#navMenu ul li:hover {
    flex-grow: 1.1;
    z-index: 2;
}
#navMenu ul li:hover > ul {
	  display: block;  
}
@media only screen and (min-width: 690px) {
    header{
        display: grid;
    }
    #mobileMenu {
        display: none;
    }
    #navMenu{
        display: block;
    }
}