Develop Reference

The code for my navbar does not work properly

I'm a beginner trying to code a navbar in a practice website but I can't get the final product right.
My navbar is supposed to line up horizontally along the top of the page and then be follow the page as you scroll with a black shadow backdrop. Currently when you load the page, the words line up vertically on the right side, and then condense when you scroll. I also have a logo in the top left that shrinks way too small. Finally, when when you shrink the page, a hamburger icon pops up in the top right that is supposed to show you the menu options, however it no longer works. It's like a cycle with this page, I fix one thing and break another. I am doing this just for fun because I'm trying to learn but now I'm getting frustrated, Thanks!
$(window).on('scroll', function() {
if ($(window).scrollTop()) {
$('nav').addClass('black');
} else {
$('nav').removeClass('black');
}
})
$(document).ready(function() {
$(".menu i").click(function() {
$("nav ul").toggleClass("active")
})
})
#import url('https://fonts.googleapis.com/css?family=Bungee|Bungee+Hairline|Oswald|Raleway&display=swap');
body {
margin: 0;
padding: 0;
height: 100%;
width: 100%;
}
nav {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100px;
padding: 10px 100px;
box-sizing: border-box;
transition: .5s;
}
nav.black {
background: rgba(0, 0, 0, .8);
height: 80px;
padding: 10px 50px;
}
nav.logo {
float: left;
}
nav .logo img {
height: 80px;
transition: .5s;
}
nav.black .logo img {
padding: 20px;
height: 60px;
}
nav ul {
float: right;
margin: 0;
padding: 0px;
display: flex;
text-shadow: 2px 2px 4px #000000;
}
nav ul li {
List-style: none;
}
nav ul li a {
Line-height: 80px;
color: #fff;
padding: 5px 20px;
font-family: 'Raleway', sans-serif;
text-decoration: none;
text-transform: uppercase;
transition: .5s;
}
nav.black ul li a {
color: #fff;
Line-height: 20px;
}
nav ul li a.active,
nav ul li a:hover {
color: #fff;
background: #008cff;
}
.responsive-bar {
display: none;
}
#media (max-width: 800px) {
.responsive-bar {
display: block;
width: 100%;
height: 60px;
background: #262626;
position: fixed;
top: 0;
Left: 0;
padding: 5px 20px;
box-sizing: border-box;
z-index: 1;
}
.responsive-bar .logo img {
float: left;
height: 50px;
}
.responsive-bar .menu i {
float: right;
color: #fff;
margin: 0;
padding: 0;
Line-height: 50px;
cursor: pointer;
text-transform: uppercase;
}
nav {
padding: 60px;
}
nav.black {
display: none;
background: #262626;
height: 60px;
padding: 0;
}
nav .logo {
display: none;
}
nav ul {
position: absolute;
width: 100%;
top: 60;
Left: 0;
background: #262626;
float: none;
display: none;
}
nav ul.active {
display: block;
}
nav ul li {
width: 100%
}
nav ul li a {
display: block;
padding: 15px;
width: 100%;
height: 60px;
text-align: center;
Line-height: 30px;
color: #fff;
}
}
* {
box-sizing: border-box;
}
.main {
height: 1000px;
padding-left: 20px;
padding-right: 100px;
}
<div class="responsive-bar">
<div class="logo">
<img src="img/logo.png">
</div>
<div class="menu">
<i class="fa fa-bars"></i>
</div>
</div>
<nav>
<div class="logo">
<img src="img/logo.png">
</div>
<ul>
<div class="active">
<li>Home</li>
<li>About</li>
<li>Services</li>
<li>Portfolio</li>
<li>Contact</li>
</div>
</ul>
</nav>
<div class="main">
</div>
<script src="https://code.jquery.com/jquery-3.4.1.js"></script>

Drop down Menu Disappears when Selecting by Hovering over submenu

when I hover around submenu , then when dragging cursor over submenu and hovering over the submenu disappers and only sometimes appear when I select any other nav menu and hover there but it only works sometimes.
Here is my code
html
{ height: 100%;}
*
{ margin: 0;
padding: 0;}
body
{ font: normal .80em 'trebuchet ms', arial, sans-serif;
background: #FFF;
color: #555;}
p
{ padding: 0 0 20px 0;
line-height: 1.7em;}
#menubar
{ width: 880px;
height: 46px;}
ul#menu
{ float: right;
margin: 0;}
ul#menu li
{ float: left;
padding: 0 0 0 9px;
list-style: none;
margin: 1px 2px 0 0;
background: #5A5A5A url(tab.png) no-repeat 0 0;}
ul#menu li a
{ font: normal 100% 'trebuchet ms', sans-serif;
display: block;
float: left;
height: 20px;
padding: 6px 35px 5px 28px;
text-align: center;
color: #FFF;
text-decoration: none;
background: #5A5A5A url(tab.png) no-repeat 100% 0;}
ul#menu li.selected a
{ height: 20px;
padding: 6px 35px 5px 28px;}
ul#menu li.selected
{ margin: 1px 2px 0 0;
background: #00C6F0 url(tab_selected.png) no-repeat 0 0;}
ul#menu li.selected a, ul#menu li.selected a:hover
{ background: #00C6F0 url(tab_selected.png) no-repeat 100% 0;
color: #FFF;}
ul#menu li a:hover
{ color: #E4EC04;}
.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
display: inline-block;
}
/* The container <div> - needed to position the dropdown content */
.dropdown {
position: relative;
display: inline-block;
}
/* Dropdown Content (Hidden by Default) */
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
z-index: 1;
margin-top: 35px;
}
/* Links inside the dropdown */
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
/* Change color of dropdown links on hover */
.dropdown-content a:hover {background-color: #f1f1f1}
/* Show the dropdown menu on hover */
.dropdown:hover .dropdown-content {
display: block;
}
<div id="main">
<div id="menubar">
<ul id="menu" >
<li ><a href="#" >Home</a></li>
<li ><a ref="#" >Contact Us</a></li>
<li >
<div class="dropdown">
<a class="dropbtn">Dropdown</a>
<div class="dropdown-content">
Link 1
Link 2
Link 3
</div>
</div>
</li>
</ul>
</div>
</div>
How can I solve this ..
Ay help is appreciated. I tried but I failed and Have no idea how to solve this.
Thanks in advance.

It's because there is a space between the "Dropdown" menu and the dropdown list. Instead of hard coding the margin in px use a percentage. I also recommend using top instead of margin-top. Replace .dropdown-content css with:
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
z-index: 1;
top: 100%; //To move it up or down more you can use calc like: calc(100% + 1px) or calc(100% - 2px)
}

when you move the mouse from the dropdown menu toggle, into the submenu, you are briefly not hovering over the div due to the margin-top value of the submenu. If you really want that divide between the two add white top border (i.e. border-top: 2px solid white;).
Heres a JSFiddle
Change the CSS as follows:
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
z-index: 1;
margin-top: 30px;
}
Change the HTML as follows:
<li class="dropdown">
<div>
<a class="dropbtn">Dropdown</a>
<div class="dropdown-content">
Link 1
Link 2
Link 3
</div>
</div>
</li>

The issue is simply a gap between li.dropdown and .dropdown-content. It is worth noting that when you move the cursor quickly from the dropdown button to the dropdown list, it does not disappear. However, doing that slowly vanishes the list.
The simplest solution I could think of here is to decrease the top margin of the dropdown list, while adding a top padding to the first list item to compensate for that lost margin (a top margin won't work here). So, your code for the dropdown menu would look like this:
#menubar {
width: 880px;
height: 46px;
}
ul#menu {
float: right;
margin: 0;
}
ul#menu li {
float: left;
padding: 0 0 0 9px;
list-style: none;
margin: 1px 2px 0 0;
background: #5A5A5A url(tab.png) no-repeat 0 0;
}
ul#menu li a {
font: normal 100% 'trebuchet ms', sans-serif;
display: block;
float: left;
height: 20px;
padding: 6px 35px 5px 28px;
text-align: center;
color: #FFF;
text-decoration: none;
background: #5A5A5A url(tab.png) no-repeat 100% 0;
}
ul#menu li.selected a {
height: 20px;
padding: 6px 35px 5px 28px;
}
ul#menu li.selected {
margin: 1px 2px 0 0;
background: #00C6F0 url(tab_selected.png) no-repeat 0 0;
}
ul#menu li.selected a,
ul#menu li.selected a:hover {
background: #00C6F0 url(tab_selected.png) no-repeat 100% 0;
color: #FFF;
}
ul#menu li a:hover {
color: #E4EC04;
}
.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
display: inline-block;
}
.dropdown {
position: relative;
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
z-index: 1;
margin-top: 30px;
}
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
.dropdown-content a:first-child {
padding-top:17px;
}
.dropdown-content a:hover {
background-color: #f1f1f1
}
.dropdown:hover .dropdown-content {
display: block;
}
<div id="main">
<div id="menubar">
<ul id="menu">
<li>Home</li>
<li><a ref="#">Contact Us</a></li>
<li>
<div class="dropdown">
<a class="dropbtn">Dropdown</a>
<div class="dropdown-content">
Link 1
Link 2
Link 3
</div>
</div>
</li>
</ul>
</div>
</div>

mobile view issue when the menu opened?

when opening the menu and scroll down the navbar still move
I want when open the menu prevents the scroll
I implemented the below code for responsive navbar but I'm facing an issue on the mobile view only
$(document).ready(function(){
$(".menu").click(function(){
$("nav").slideToggle(800);
})
$(window).scroll(function() {
var distanceFromTop = $(document).scrollTop();
if (distanceFromTop >= $('.banner').height())
{
$('nav').addClass('fixed');
}
else
{
$('nav').removeClass('fixed');
}
});
});
body{
height:1000px;
}
.banner{
height: 120px;
background: red;
}
.fixed {
position: fixed;
top: 0;
width: 100%;
}
nav{
width: 100%;
background: #202c45;
padding: 0 50px;
box-sizing: border-box;
}
nav h1{
margin: 0;
padding: 0;
float: left;
padding-top: 18px;
}
nav h1 a{
color: #fff;
text-decoration: none;
}
nav ul{
margin: 0;
padding: 0;
float: right;
}
nav ul li{
list-style: none;
display: inline-block;
padding: 20px;
transition: 0.5s;
}
nav ul li:hover{
background: #f2184f;
}
nav ul li a{
color: #fff;
text-decoration: none;
}
.responsive-bar{
width: 100%;
background: #202c45;
padding: 10px 30px;
box-sizing: border-box;
display: none;
}
.responsive-bar h3{
margin: 0;
padding: 3px 0;
float: left;
color:#fff;
}
.responsive-bar h3 a{
color:#fff;
text-decoration: none;
}
.responsive-bar h4{
margin: 0;
padding: 0;
color: #fff;
float: right;
cursor: pointer;
padding: 5px 10px;
background:#f2184f;
text-transform: uppercase;
}
#media (min-width:768px){
nav{
display: block !important;
}
}
#media (max-width:768px){
.banner{
display: none;
position: fixed;
}
nav{
display: none;
padding: 0;
}
.responsive-bar{
display: block;
position: fixed;
}
nav h1{
display: block;
float: none;
}
nav ul{
float: none;
}
nav ul li{
display: block;
text-align: center;
padding: 15px 20px;
border-bottom: 1px solid rgba(255,255,255,.1)
}
#full-logo{
display: none;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<div class="banner">centered image
</div>
<nav>
<h1 id="full-logo">MyCar</h1>
<ul>
<li>Home</li>
<li>About</li>
<li>Service</li>
<li>Portfolio</li>
<li>Contact</li>
</ul>
<div style="clear:both;"></div>
</nav>
<div class="responsive-bar">
<h3 class="brand">MyCar</h3>
<h4 class="menu">Menu</h4>
<div style="clear:both;"></div>
</div>
any help on that issue, please
note: i hide the banner above the navbar on the mobile view but on the big screen view not hidden

Add 'overflow:hidden' to body when menu is open. it will solve your problem.
$(document).ready(function(){
$(".menu").click(function(){
$("nav").slideToggle(800);
})
$(window).scroll(function() {
var distanceFromTop = $(document).scrollTop();
if (distanceFromTop >= $('.banner').height())
{
$('nav').addClass('fixed');
$('body').css('overflow', 'hidden');
}
else
{
$('nav').removeClass('fixed');
$('body').css('overflow', 'auto')
}
});
});
body{
height:1000px;
}
.banner{
height: 120px;
background: red;
}
.fixed {
position: fixed;
top: 0;
left:0;
/* bottom:0;
overflow:auto; */ /* if you want scroll inside menu */
width: 100%;
}
nav{
width: 100%;
background: #202c45;
padding: 0 50px;
box-sizing: border-box;
}
nav h1{
margin: 0;
padding: 0;
float: left;
padding-top: 18px;
}
nav h1 a{
color: #fff;
text-decoration: none;
}
nav ul{
margin: 0;
padding: 0;
float: right;
}
nav ul li{
list-style: none;
display: inline-block;
padding: 20px;
transition: 0.5s;
}
nav ul li:hover{
background: #f2184f;
}
nav ul li a{
color: #fff;
text-decoration: none;
}
.responsive-bar{
width: 100%;
background: #202c45;
padding: 10px 30px;
box-sizing: border-box;
display: none;
}
.responsive-bar h3{
margin: 0;
padding: 3px 0;
float: left;
color:#fff;
}
.responsive-bar h3 a{
color:#fff;
text-decoration: none;
}
.responsive-bar h4{
margin: 0;
padding: 0;
color: #fff;
float: right;
cursor: pointer;
padding: 5px 10px;
background:#f2184f;
text-transform: uppercase;
}
#media (min-width:768px){
nav{
display: block !important;
}
}
#media (max-width:768px){
.banner{
display: none;
position: fixed;
}
nav{
display: none;
padding: 0;
}
.responsive-bar{
display: block;
position: fixed;
top:0;
left:0;
}
nav h1{
display: block;
float: none;
}
nav ul{
float: none;
}
nav ul li{
display: block;
text-align: center;
padding: 15px 20px;
border-bottom: 1px solid rgba(255,255,255,.1)
}
#full-logo{
display: none;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<div class="banner">centered image
</div>
<nav>
<h1 id="full-logo">MyCar</h1>
<ul>
<li>Home</li>
<li>About</li>
<li>Service</li>
<li>Portfolio</li>
<li>Contact</li>
</ul>
<div style="clear:both;"></div>
</nav>
<div class="responsive-bar">
<h3 class="brand">MyCar</h3>
<h4 class="menu">Menu</h4>
<div style="clear:both;"></div>
</div>

navbar responsive issue when resize the browser width?

i have an issue for the responsive navbar, when i resize the browser for the mobile view and open then close the menu button, after that make the browser full screen for the big screen view the navbar will disappear
any help for that issue
i need to add another feature to fix the navbar when scroll down but when scroll on the mobile the menu it looks messed up
below my code(on snippet)
$(document).ready(function(){
$(".menu").click(function(){
$("nav").slideToggle(800);
})
});
nav{
width: 100%;
background: #202c45;
padding: 0 50px;
box-sizing: border-box;
}
nav h1{
margin: 0;
padding: 0;
float: left;
padding-top: 18px;
}
nav h1 a{
color: #fff;
text-decoration: none;
}
nav ul{
margin: 0;
padding: 0;
float: right;
}
nav ul li{
list-style: none;
display: inline-block;
padding: 20px;
transition: 0.5s;
}
nav ul li:hover{
background: #f2184f;
}
nav ul li a{
color: #fff;
text-decoration: none;
}
.responsive-bar{
width: 100%;
background: #202c45;
padding: 10px 30px;
box-sizing: border-box;
display: none;
}
.responsive-bar h3{
margin: 0;
padding: 3px 0;
float: left;
color:#fff;
}
.responsive-bar h3 a{
color:#fff;
text-decoration: none;
}
.responsive-bar h4{
margin: 0;
padding: 0;
color: #fff;
float: right;
cursor: pointer;
padding: 5px 10px;
background:#f2184f;
text-transform: uppercase;
}
#media (max-width:768px){
nav{
display: none;
padding: 0;
}
.responsive-bar{
display: block;
}
nav h1{
display: block;
float: none;
}
nav ul{
float: none;
}
nav ul li{
display: block;
text-align: center;
padding: 15px 20px;
border-bottom: 1px solid rgba(255,255,255,.1)
}
#full-logo{
display: none;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<nav>
<h1 id="full-logo">MyCar</h1>
<ul>
<li>Home</li>
<li>About</li>
</ul>
<div style="clear:both;"></div>
</nav>
<div class="responsive-bar">
<h3 class="brand">MyCar</h3>
<h4 class="menu">Menu</h4>
<div style="clear:both;"></div>
</div>

As per your html structure you have to add below code to your css
#media (min-width:768px){
nav{
display: block !important;
}
}
Using this you don't have to make any changes in your html and css.
$(document).ready(function(){
$(".menu").click(function(){
$("nav").slideToggle(800);
})
});
nav{
width: 100%;
background: #202c45;
padding: 0 50px;
box-sizing: border-box;
}
nav h1{
margin: 0;
padding: 0;
float: left;
padding-top: 18px;
}
nav h1 a{
color: #fff;
text-decoration: none;
}
nav ul{
margin: 0;
padding: 0;
float: right;
}
nav ul li{
list-style: none;
display: inline-block;
padding: 20px;
transition: 0.5s;
}
nav ul li:hover{
background: #f2184f;
}
nav ul li a{
color: #fff;
text-decoration: none;
}
.responsive-bar{
width: 100%;
background: #202c45;
padding: 10px 30px;
box-sizing: border-box;
display: none;
}
.responsive-bar h3{
margin: 0;
padding: 3px 0;
float: left;
color:#fff;
}
.responsive-bar h3 a{
color:#fff;
text-decoration: none;
}
.responsive-bar h4{
margin: 0;
padding: 0;
color: #fff;
float: right;
cursor: pointer;
padding: 5px 10px;
background:#f2184f;
text-transform: uppercase;
}
#media (max-width:768px){
nav{
display: none;
padding: 0;
}
.responsive-bar{
display: block;
}
nav h1{
display: block;
float: none;
}
nav ul{
float: none;
}
nav ul li{
display: block;
text-align: center;
padding: 15px 20px;
border-bottom: 1px solid rgba(255,255,255,.1)
}
#full-logo{
display: none;
}
}
#media (min-width:768px){
nav{
display: block !important;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<nav>
<h1 id="full-logo">MyCar</h1>
<ul>
<li>Home</li>
<li>About</li>
</ul>
<div style="clear:both;"></div>
</nav>
<div class="responsive-bar">
<h3 class="brand">MyCar</h3>
<h4 class="menu">Menu</h4>
<div style="clear:both;"></div>
</div>

You also need to update your navigation when the window is resized. Kindly check. Hope this is helpful to you. Just made a update in jquery.
$(document).ready(function(){
$(".menu").click(function(){
$("nav").slideToggle(800);
});
$( window ).resize(function() {
if($(window).width() > 767) {
$("nav").slideDown(800);
}
});
});
nav{
width: 100%;
background: #202c45;
padding: 0 50px;
box-sizing: border-box;
display: block
}
nav h1{
margin: 0;
padding: 0;
float: left;
padding-top: 18px;
}
nav h1 a{
color: #fff;
text-decoration: none;
}
nav ul{
margin: 0;
padding: 0;
float: right;
}
nav ul li{
list-style: none;
display: inline-block;
padding: 20px;
transition: 0.5s;
}
nav ul li:hover{
background: #f2184f;
}
nav ul li a{
color: #fff;
text-decoration: none;
}
.responsive-bar{
width: 100%;
background: #202c45;
padding: 10px 30px;
box-sizing: border-box;
display: none;
}
.responsive-bar h3{
margin: 0;
padding: 3px 0;
float: left;
color:#fff;
}
.responsive-bar h3 a{
color:#fff;
text-decoration: none;
}
.responsive-bar h4{
margin: 0;
padding: 0;
color: #fff;
float: right;
cursor: pointer;
padding: 5px 10px;
background:#f2184f;
text-transform: uppercase;
}
#media (max-width:768px){
nav{
display: none;
padding: 0;
}
.responsive-bar{
display: block;
}
nav h1{
display: block;
float: none;
}
nav ul{
float: none;
}
nav ul li{
display: block;
text-align: center;
padding: 15px 20px;
border-bottom: 1px solid rgba(255,255,255,.1)
}
#full-logo{
display: none;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<nav>
<h1 id="full-logo">MyCar</h1>
<ul>
<li>Home</li>
<li>About</li>
</ul>
<div style="clear:both;"></div>
</nav>
<div class="responsive-bar">
<h3 class="brand">MyCar</h3>
<h4 class="menu">Menu</h4>
<div style="clear:both;"></div>
</div>

Please check the below line of code to add image above nav and make header sticky.
Script
$(document).ready(function(){
$(".menu").click(function(){
$("nav").slideToggle(800);
$("nav").toggleClass("fixed_nav");
$(".responsive-bar").toggleClass("addtop");
});
});
$(window).scroll(function(){
if($(window).width() > 767) {
if ($(window).scrollTop() >= 150) {
$('nav').addClass('fixed-header');
}
else {
$('nav').removeClass('fixed-header');
}
}
else {
if ($(window).scrollTop() >= 150) {
$('.responsive-bar').addClass('fixed-header');
}
else {
$('.responsive-bar').removeClass('fixed-header');
}
}
});
HTML
<div class="img-wrapper">
<img src="https://via.placeholder.com/1250x150">
</div>
<nav class="nav-bar">
<h1 id="full-logo">MyCar</h1>
<ul>
<li>Home</li>
<li>About</li>
</ul>
<div style="clear:both;"></div>
</nav>
<div class="responsive-bar">
<h3 class="brand">MyCar</h3>
<h4 class="menu">Menu</h4>
<div style="clear:both;"></div>
</div>
.............
CSS
nav{
width: 100%;
background: #202c45;
padding: 0 50px;
box-sizing: border-box;
}
nav h1{
margin: 0;
padding: 0;
float: left;
padding-top: 18px;
}
nav h1 a{
color: #fff;
text-decoration: none;
}
nav ul{
margin: 0;
padding: 0;
float: right;
}
nav ul li{
list-style: none;
display: inline-block;
padding: 20px;
transition: 0.5s;
}
nav ul li:hover{
background: #f2184f;
}
nav ul li a{
color: #fff;
text-decoration: none;
}
.responsive-bar{
width: 100%;
background: #202c45;
padding: 10px 30px;
box-sizing: border-box;
display: none;
}
.responsive-bar h3{
margin: 0;
padding: 3px 0;
float: left;
color:#fff;
}
.responsive-bar h3 a{
color:#fff;
text-decoration: none;
}
.responsive-bar h4{
margin: 0;
padding: 0;
color: #fff;
float: right;
cursor: pointer;
padding: 5px 10px;
background:#f2184f;
text-transform: uppercase;
}
#media (max-width:768px){
nav{
display: none;
padding: 0;
}
.responsive-bar{
display: block;
}
nav h1{
display: block;
float: none;
}
nav ul{
float: none;
}
nav ul li{
display: block;
text-align: center;
padding: 15px 20px;
border-bottom: 1px solid rgba(255,255,255,.1)
}
#full-logo{
display: none;
}
img {
display: none;
}
.nav-bar.fixed_nav{
display: none;
position: fixed;
width: 100%;
left: 0px;
right: 0px;
top: 0px;
}
.fixed-header.addtop {
top: 98px;
}
}
#media (min-width:768px){
nav{
display: block !important;
}
}
.sticky {
position: fixed;
top: 0;
width: 100%;
}
.fixed-header {
position: fixed;
top: 0;
left: 0;
width: 100%;
}

CSS menu make links centre

I have this css for my horizontal menu:
nav {
height: 40px;
width: 100%;
background: #F00;
font-size: 11pt;
font-family: Arial;
font-weight: bold;
position: relative;
border-bottom: 2px solid #FFFFFF;
}
nav ul {
padding: 0;
margin: 0 auto;
width: 600px;
height: 40px;
}
nav li {
display: inline;
float: left;
}
.clearfix:before,
.clearfix:after {
content: " ";
display: table;
}
.clearfix:after {
clear: both;
}
.clearfix {
*zoom: 1;
}
nav a {
color: #000000;
display: inline-block;
width: 100px;
text-align: center;
text-decoration: none;
line-height: 40px;
}
nav li a {
border-right: 1px solid #FFFFFF;
box-sizing:border-box;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
}
nav li:last-child a {
border-right: 0;
}
nav a:hover, nav a:active {
background-color: #000000;
color:#FFFFFF;
}
nav a#pull {
display: none;
}
#media screen and (max-width: 600px) {
nav {
height: auto;
}
nav ul {
width: 100%;
display: block;
height: auto;
}
nav li {
width: 50%;
float: left;
position: relative;
}
nav li a {
border-bottom: 1px solid #FFFFFF;
border-right: 1px solid #FFFFFF;
}
nav a {
text-align: left;
width: 100%;
text-indent: 25px;
}
}
#media only screen and (max-width : 480px) {
nav {
border-bottom: 0;
}
nav ul {
display: none;
height: auto;
}
nav a#pull {
display: block;
background-color: #FF0;
width: 100%;
position: relative;
}
nav a#pull:after {
content:"";
background: url('nav-icon.png') no-repeat;
width: 30px;
height: 30px;
display: inline-block;
position: absolute;
rightright: 15px;
top: 10px;
}
}
#media only screen and (max-width : 320px) {
nav li {
display: block;
float: none;
width: 100%;
}
nav li a {
border-bottom: 1px solid #FFFFFF;
}
}
how can i make the li links display in the centre?
here is a fiddle of the menu: http://jsfiddle.net/zJq52/

I would do this:
nav ul {
padding: 0;
margin: 0 auto;
width: 600px;
height: 40px;
text-align: center; // add text-align
}
nav li {
display: inline; // no more float in here
}
DEMO HERE
Update 1:
To make the width auto:
nav a {
color: #000000;
display: inline-block;
width: auto; // changed this from width: 100px; to auto.
text-align: center;
text-decoration: none;
line-height: 40px;
}
DEMO HERE
Update 2:
Finished Version!
DEMO HERE

Live demo
Change nav a to this:
nav a {
text-align: center;
width: 100%;
}
I also have to mention that you have two nav as. You should merge them into one and apply a little change:
nav a {
color: #000000;
display: inline-block;
text-align: center;
text-decoration: none;
line-height: 40px;
width: 100%;
padding: 0 10px;
}
jsFiddle for the merged one and the result for me:
If you want to center the buttons as a row in the horizontal bar then just simply apply a width to the <ul> so add a new class: <ul class="clearfix cont"> and style it in a media rule so it won't affect the other layouts:
#media screen and (min-width: 600px) {
.cont {width: 380px;}
}
jsFiddle and the result:

Not sure exactly what you mean, but if you mean centering all the li in relation to its parent change the width from 600px to 400px
nav ul {
padding: 0;
width: 400px;
height: 40px;
display: block;
margin: 0 auto;
position: relative;
}
demo: - http://jsfiddle.net/zQehH/2/

UPDATED DEMO JSFiddle
Here is the correct way to do the stuff you want
CSS-
nav ul {
padding: 0;
margin: 0 auto;
width:800px;
text-align:center;
height: 40px;
}
nav li {
display: inline-block; //use inline block
}
nav a {
color: #000000;
display: inline-block;
padding: 0 20px; //use padding instead of width
text-decoration: none;
line-height: 40px;
}

Making the choice for a float isn't always the right one.
Your example contains a fixed width of 600px on the "nav ul" element is weird when you only have 4 elements of ~100px width. You can't center that...
I basically removed the float, and the clearfixes.
And then I've made it to contain the following based on how I'd do it..
nav {
margin: 0 auto;
text-align: center;
}
nav ul {
margin: 0 auto;
text-align: center;
width: auto;
}
nav ul li {
display: inline;
display: inline-block;
}
nav ul li a {
/*width: 100px;*/
width: auto;
padding: 0 10px;
}
My example:
http://jsfiddle.net/xewl/4CrdN/1/
I see that you have other versions that do kinda work as planned:
http://jsfiddle.net/zJq52/6/
You didn't set a width on "nav ul li a" here.
But why is there a width on "nav ul" of 400px?

Try This
nav li a {
border-right: 1px solid #FFFFFF;
box-sizing:border-box;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
text-align:center; /*Added Line*/
}

Super simple.
Add text-align: center to nav ul and remove float: left from nav li.
nav ul {
padding: 0;
margin: 0 auto;
width: 600px;
height: 40px;
text-align: center;
}
nav li {
display: inline;
}
Here's an updated fiddle: http://jsfiddle.net/qwUF7/