Why won't my nav bar text center : Okay so my navigation bar text won't center properly, it acts almost like a drop down menu instead when I center it. I couldn't find out why. Also if you could help with this, my social media buttons are all showing up blue instead of the color in the CSS sheet. Thanks!

    <DOCTYPE! html>
    
<html>
    
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    
 <head>
    
            <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">    
    
    
    <title>Home</title> 
     
     
     
                    <!--CSS Sheet-->
    
    <style>
       
    h1 {
        font-size: 60;
        text-align: center;
        font-family: "Bodoni MT", Didot, "Didot LT STD", "Hoefler Text", Garamond, "Times New Roman", serif;
    }
       
       
/* Top Navigation Bar*/
      
         .topnav {
            background-color: #666666;
            overflow: hidden;
        }
          
         .topnav a {
            font-family:  Rockwell, 'Courier Bold', Courier, Georgia, Times, 'Times New Roman', serif;
            float: center;
            display: block;
            color: #f2f2f2;
            text-align: center;
            padding: 8px 16px;
            text-decoration: none;
            font-size: 17px;
        }
                
         .topnav a:hover {
            background-color: #ddd;
            color: black;
        }
        
         .topnav .icon {
            display: none;
        }
        
        @media screen and (max-width: 600px) {
          .topnav a:not(:first-child) {display: none;}
          .topnav a.icon {
            float: right;
            display: block;
          }
        }
        
        @media screen and (max-width: 600px) {
          .topnav.responsive {position: relative;}
          .topnav.responsive .icon {
            position: absolute;
            right: 0;
            top: 0;
          }
          .topnav.responsive a {
            float: none;
            display: block;
            text-align: left;
          }
        
        }


/*Slideshow*/
 
            
        /* Slideshow container */
        .slideshow-container {
          max-width: 1000px;
          position: relative;
          margin: auto;
        }
        
        /* Caption text */
        .text {
          color: #f2f2f2;
          font-size: 15px;
          padding: 8px 12px;
          position: absolute;
          bottom: 8px;
          width: 100%;
          text-align: center;
        }
        
        /* Number text (1/3 etc) */
        .numbertext {
          color: #f2f2f2;
          font-size: 12px;
          padding: 8px 12px;
          position: absolute;
          top: 0;
        }
        
        /* The dots/bullets/indicators */
        .dot {
          height: 13px;
          width: 13px;
          margin: 0 2px;
          background-color: #bbb;
          border-radius: 50%;
          display: inline-block;
          transition: background-color 0.6s ease;
        }
        
        .active {
          background-color: #717171;
        }
        
        /* Fading animation */
        .fade {
          -webkit-animation-name: fade;
          -webkit-animation-duration: 1.5s;
          animation-name: fade;
          animation-duration: 1.5s;
        }
        
        @-webkit-keyframes fade {
          from {opacity: .4} 
          to {opacity: 1}
        }
        
        @keyframes fade {
          from {opacity: .4} 
          to {opacity: 1}
        }
        
        /* On smaller screens, decrease text size */
        @media only screen and (max-width: 300px) {
          .text {font-size: 11px}
}           


/*Social Media Buttons*/
    
            .fa {
          padding: 20px;
          font-size: 30px;
          width: 30px;
          text-align: center;
          text-decoration: none;
          margin: 5px 2px;
          border-radius: 50%;
        }
        
        .fa:hover {
            opacity: 0.7;
        }
        
        .fa-facebook {
          background: #3B5998;
          color: white;
        }
        
        .fa-twitter {
          background: #55ACEE;
          color: white;
        }
            
        fa-youtube {
          background: #bb0000;
          color: white;
        }
        
        .fa-instagram {
          background: #125688;
          color: white;
        }
        
        .fa-snapchat-ghost {
          background: #fffc00;
          color: white;
          text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;
        }
        
/*End of Social Media Buttons*/

/*Footer*/

        


    </style>
     
 </head>
    
    <body>
    
    <br>
      <!--Title/Logo--><h1>Tavernier Tech</h1>
    <br>

    
    <!--Navigation Bar-->    
             <div class="topnav" id="myTopnav">    
              <a href="#home">Home</a>
              <a href="#articles">Articles</a>
              <a href="#news">Shop</a>
              <a href="#contact">Contact</a>
              <a href="#about">About</a>
              <a href="javascript:void(0);" style="font-size:15px;" class="icon" onclick="myFunction()">&#9776;</a>
            </div>
            
               <script>
            function myFunction() {
                var x = document.getElementById("myTopnav");
                if (x.className === "topnav") {
                    x.className += " responsive";
                } else {
                    x.className = "topnav";
                }
            }
</script>    
        
        <br>
        
                       <!--Slideshow--> 
        
             <div class="slideshow-container">
        
        <div class="mySlides fade">
          <div class="numbertext"></div>
          <img src="https://media.licdn.com/mpr/mpr/AAEAAQAAAAAAAATOAAAAJDE2NDQ3ZjkzLTljOTAtNDU2Mi04NGRlLTc5NWRkZTYwNzNlMQ.jpg" style="width:90%">
          <div class="text"></div>
        </div>
        
        <div class="mySlides fade">
          <div class="numbertext"></div>
          <img src="http://www.ntech.net.au/wp-content/uploads/2015/07/network-switch-ethernet.jpg" style="width:90%">
          <div class="text"></div>
        </div>
        
        </div>
        <br>
        
        <div style="text-align:center">
          <span class="dot"></span> 
          <span class="dot"></span> 
        </div>
        
        <script>
        var slideIndex = 0;
        showSlides();
        
        function showSlides() {
            var i;
            var slides = document.getElementsByClassName("mySlides");
            var dots = document.getElementsByClassName("dot");
            for (i = 0; i < slides.length; i++) {
               slides[i].style.display = "none";  
            }
            slideIndex++;
            if (slideIndex> slides.length) {slideIndex = 1}    
            for (i = 0; i < dots.length; i++) {
                dots[i].className = dots[i].className.replace(" active", "");
            }
            slides[slideIndex-1].style.display = "block";  
            dots[slideIndex-1].className += " active";
            setTimeout(showSlides, 10000); // Change image every 10 seconds
        }
        </script>



                <!--Footer-->

<footer class="">
    
                <!--Social Media Buttons-->
    <a href="#" class="fa fa-facebook-official"></a>
    <a href="#" class="fa fa-twitter"></a>
    <a href="#" class="fa fa-instagram"></a>
    <a href="#" class="fa fa-youtube"></a>
    
</footer>
        
        
        
    </body>
    
</html>