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bootstrap "mega-dropdown" centering main menu nav items

I am trying to build a main menu navigation with a full width screen drop downs below it. I found an awesome example to build off of, but I cannot seem to figure out how center the main menu items themselves.
Here is what I have so far, See example here : http://codepen.io/ajmajma/pen/ALJbdk .
This works perfectly, however I need those main menu items (home, about, etc..) to be centered.
My first thought was to inline-block them, however this causes some screwy behaviour with the sub menu.
IF I add
.desktop-nav {
text-align: center
}
.menu {
display: inline-block
}
I get the desired centered effect, however the sub menu is confined the the small center size of the ul, and I need it to remain the full width of the page. See behavior here - http://codepen.io/ajmajma/pen/wzYPQm .
Any idea of how to fix this to get desired effect? Thanks!

You could add a text-align:center to the ul and add a display:inline-block to the li. Just remove the float:left from the li and you're good.
.menu > ul {
margin: 0 auto;
width: 100%;
list-style: none;
padding: 0;
position: relative;
box-sizing: border-box;
text-align:center;
}
.menu > ul > li {
display: inline-block;
padding: 5px;
margin: 0;
}
http://codepen.io/Founded1898/pen/amREJm

I have found the solution to this:
.desktop-nav {
margin-left: 50%;
}
.menu > ul > li > ul {
margin-left: -50%;
}
If you don't want to set the margin in the desktop, you have to create a something like .iWantThisMenuToCenter {margin-left: 50%}and assign it to the <nav> tag.

Make Element Appear On Minimum Screen Size

I have a bug in my header when I shrink the screen size down. The nav is supposed to disappear (only to reappear if the mobile nav icon is clicked,) which is working fine. However, if I click the mobile nav icon, and then click it again to hide it, the nav stays hidden even when I expand the screen size out again.
I want the nav to show up again when the screen gets to 670px.
CSS
#media screen and (min-width: 671px) {
.nav {
display: block;
}
}
#media screen and (max-width: 670px) {
.navicon {
display: block;
}
.homeiconcontainers {
float: none;
width: 100%;
}
.header {
background: none;
opacity: 1;
}
.pagelinkcontainers {
float: none;
line-height: 50px;
background-color: black;
width: 200px;
padding-right: 0px;
text-align: center;
}
ul {
padding-left: 20px;
}
.nav {
display: none;
}
}
JavaScript
// Show Mobile Navbar Onclick
function MobileMenu (object) {
var elements={"nav":{title: "nav"}};
var mobiledisplay = window.getComputedStyle(document.getElementById("nav")).display;
//Show nav element
for(var nav in elements) {
if(object!==nav) {
document.getElementById(nav).style.display='none';
}
if(object==nav && mobiledisplay=='block') {
document.getElementById(nav).style.display='none';
}
else {
document.getElementById(nav).style.display='block';
location.hash=pages[nav].title;
document.title=pages[nav].title;
}
}
}
My .nav is somehow getting display: none from either my 670px media query, or from the javascript function. I could also be mis-using the min-width media query, but I'm not sure.
Im assuming you don't need to see my HTML to figure this out, but if you would like to, let me know.

Now CSS takes precedence over the JavaScript inline styling forcing the nav bar to be visible.
#media screen and (min-width: 671px) {
.nav {
display: block !important;
}
Why?
JavaScript code setting inline styling wins from CSS styling. Or better said always takes priority to CSS rules except when that CSS rule has !important.

Bootstrap dropdowns want to force accordion style always

I am working from this tutorial for side navigation with bootstrap.
So far my side nav looks great, however I want to force the drop downs to be the accordion style they are when the are in the mobile (collapsed) menu, all the time.
In other words I never want me dropdowns to "pop-over" other content I want them to expand.
So I want this effect always:
Even when the menu is at the side like this:
Anyone know how to achieve this???

You'll need to adjust the given CSS some...
/* make sidebar nav vertical */
#media (min-width: 768px) {
.sidebar-nav .navbar .navbar-collapse {
padding: 0;
max-height: none;
}
.sidebar-nav .navbar ul {
float: none;
}
.sidebar-nav .navbar ul:not {
display: block;
}
.sidebar-nav .navbar li {
float: none;
display: block;
}
.sidebar-nav .navbar li a {
padding-top: 12px;
padding-bottom: 12px;
}
}
As you can see, the CSS changes at a width of 768px. Change that value to whatever size screens you wish to target, and you'll get the result you're after.

Bug with inside responsive menu

I am beginner in JS.
I found wonderful example of responsive menu, and put code inside functions.php. Menu must works like here http://filamentgroup.com/examples/rwd-nav-patterns/ but i have the bug - dropdown menu shift to the right in my site when I use tablet mode.
I tried to include this menu in my site, based on Bootstrap http://b.pusku.com

UPDATE:
Part of the problem with the fiddle was that the space allotted for the logo image was too wide, so I added the following to correct that:
#logo > img {
width: 25px;
}
To get the dropdown to float left at all times, add:
.nav-menu .nav-primary {
float: left;
clear: none;
}
to the #media screen and (min-width: 910px) rule...
#media screen and (min-width: 910px) {
.nav-primary {
float: right;
clear: none;
}
.nav-menu .nav-primary {
float: left;
clear: none;
}
}
Once the navigation links collapse to a dropdown, they'll float left. The links will have an offset of 25px on the left because of the following rule in bootstrap.css (on line 728):
ul, ol {
padding: 0;
margin: 0 0 10px 25px; /*specifically this rule*/
}
You can override that, if you like, by adding margin-left: 0; to the .nav-primary ul rule:
.nav-primary ul {
border: 1px solid #e6e6e6;
margin-left: 0; /* add this to override the bootstrap.css rule*/
}
Finally, as the screen width narrows, the dropdown's width seems to stretch the entire width. If this is not a desired effect, add display: inline-block; to the .nav-primary rule:
.nav-primary {
clear: left;
margin: 0 0 2em;
display: inline-block;
}
I've also re-written the javascript that makes the "responsive" navigation collapse to a dropdown using more (appropriately named) variables so you may better understand why the script does what it does:
$(document).ready(function () {
'use strict';
$('.nav-primary')
// test the menu to see if all items fit horizontally
.bind('testfit', function () {
var nav = $(this),
navPrimaryTop = nav.offset().top, // top of div.nav-primary
navSkipNavTop = nav.prev().offset().top, // top of p containing a#main
topOfFirstLink = nav.find('li:first-child').offset().top, //top of "What We Done"
topOfLastLink = nav.find('li:last-child').offset().top, //top of "Contact Us"
navBelowSkipNav = navPrimaryTop > navSkipNavTop, //boolean indicating whether div.nav-primary is below the p containing a#main
lastLinkBelowFirstLink = topOfLastLink > topOfFirstLink, //boolean indicating whether "Contact Us" is below "What We Done"
displayAsMenu = navBelowSkipNav || lastLinkBelowFirstLink; // boolean indicating whether to collapse to a dropdown menu
$('body').removeClass('nav-menu');
if (displayAsMenu) {
$('body').addClass('nav-menu');
}
})
// toggle the menu items' visiblity
.find('h3').bind('click focus', function () {
$(this).parent().toggleClass('expanded');
});
// ...and update the nav on window events
$(window).bind('load resize orientationchange', function () {
$('.nav-primary').trigger('testfit');
});
});
Here's an updated fiddle demonstrating the basics: http://jsfiddle.net/DD7MC/1/
I did not override either the margin-left or the display in the updated fiddle.
ORIGINAL:
I think it's a CSS conflict between rwd-nav.css and bootstrap.css. Try changing the class definition for .nav-menu .nav-primary h3 in rwd-nav.css to:
.nav-menu .nav-primary h3 {
position: absolute;
top: -10px; /* <-- change this line */
left: auto;
right: 0;
display: block;
width: 4em;
height: 3.75em; /* <-- change this line */
background: #ccc url(img/icons.png) no-repeat -205px 45%;
text-indent: -999em;
cursor: pointer;
font-size: inherit; /* <-- add this line */
}
Also, your hosting provider is returning a 404 for url(img/icons.png). You may want to make sure that file exists.

Slide down vertical menu without pushing horizontal from submenus

I have a menu list that is floated left for the main headings:
When a menu item with a submenu has a hover state, the submenu drops down, but pushes the menu to the right if it is wider than the main heading (spacing between 'shop' and 'about' -- as expected I suppose):
I'm trying to get the submenu to maintain its height (to push down the content below it on the page), but not push the items to the right over based on its width.
Using position: absolute just ignores the height of the submenu when its open.
Hoping there is something I'm missing.
Thanks for your help!

Try setting the width of the submenu to be that of the parent menu and then setting:
text-overflow: inherit;
overflow: visible;
On the submenu

I would position the sub menu dynamically and set its position to absolute. You will have to get the menu buttons left position and height and then set the sub menus left and its top to the height of its parent. Don't forget to use offset() to get the left position in case the menu is embedded in another container on the page.

I think that pushing the content downward can be done (only?) via javascript. Here is the updated fiddle and its source:
JS:
$(document).ready(function(){
$("li.drop").hover(function(){
$(this).addClass("hover");
$('#nav').css('height', $(this).children('ul:first').height()+30+'px');
}, function(){
$(this).removeClass("hover");
$('#nav').css('height', '');
});
});
CSS:
#nav > li {
position:relative;
display:inline;
margin:0px 15px;
padding:0;
}
#nav > li ul {
display: none;
position:absolute;
top:100%;
left:0;
min-width:200px;
}
#nav > li.hover ul {
display: block;
}
#content {
height: 50px;
width: 100%;
background: grey;
}
#nav ul {
list-style-type: none;
padding:0;
}