HTML Horizontal Nav Centre - html

Question

I'm fairly new to CSS/HTML and am trying to make a horizontal nav with a dropdown menu. I have made the nav but I am having trouble getting it centred on the page.
#NavigationTop ul{
list-style: none;
position:relative;
margin:0 auto;
padding-right: 1px;
width: 1075px;
}
#NavigationTop ul a{
color:#ffffff;
text-decoration:none;
font-weight:700;
font-size:15px;
padding:0 15px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
line-height: 50px;
text-transform: uppercase;
}
#NavigationTop ul li{
background-color: #343434;
width: 215px;
height: 50px;
position:relative;
float: left;
margin:0 auto;
text-align: center;
border-top: 1px solid #000000;
border-bottom: 1px solid #000000;
}
#NavigationTop ul li:hover{
background-color: lightseagreen;
}
#NavigationTop ul li a:visited{
color: #ffffff
}
#NavigationTop ul ul{
display:none;
position:absolute;
top:100%;
left:0;
padding:0;
margin: 0;
}
#NavigationTop ul ul li{
float:none;
width:215px;
border-bottom: 1px solid;
}
#NavigationTop ul li:hover > ul{
display: block;
}
<nav id="NavigationTop">
<div id="main-nav">
<ul>
<li>HOME</li>
<li>BIOGRAPHY</li>
<li>DISCOGRAPHY</li>
<li>MEDIA
<ul>
<li>Audio
<li>Video
<li>Photos
</ul>
</li>
<li>CONTACT</li>
</ul>
</div>
</nav>
I'm sure there are many errors, but what could I do to make it centred? Also is it possible to have the nav hide the overflow from the main ul and still show the drop-down menu? Thank you.

Answer 1

Change only this:
#NavigationTop ul {
list-style: none;
position: relative;
margin: 0 auto;
padding-right: 1px;
display: inline-block;
}
div#main-nav {
text-align: center;
}

Answer 2

Whenever you want to make a div center or any html element. you need a container( eg. div or ul or any other) and place the html element inside that container and give specific width to that container with property margin: 0 auto .
By specifying width, your content will not spread across the viewport(brower screen) and when you specify Margin, in shorthand notion( 0 auto ) means 0 will hold the margin for Top & Bottom while auto will hold Left & Right automatically by browser.
Then whatever you will place that container, you can use Floating easily so that your design looks perfect.
Remove the width from #NavigationTop ul
Add specific width till your menu not breaking then add that on #main-nav
#main-nav{
width: 1120px; //in your design case i found it this in px.
margin: 0 auto;
}
#NavigationTop ul{
list-style: none;
position:relative;
margin:0 auto;
padding-right: 1px;
}
#main-nav{
width: 1120px; //in your design case i found it this in px.
margin: 0 auto;
}
#NavigationTop ul{
list-style: none;
position:relative;
margin:0 auto;
padding-right: 1px;
}
#NavigationTop ul a{
color:#ffffff;
text-decoration:none;
font-weight:700;
font-size:15px;
padding:0 15px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
line-height: 50px;
text-transform: uppercase;
}
#NavigationTop ul li{
background-color: #343434;
width: 215px;
height: 50px;
position:relative;
float: left;
margin:0 auto;
text-align: center;
border-top: 1px solid #000000;
border-bottom: 1px solid #000000;
}
#NavigationTop ul li:hover{
background-color: lightseagreen;
}
#NavigationTop ul li a:visited{
color: #ffffff
}
#NavigationTop ul ul{
display:none;
position:absolute;
top:100%;
left:0;
padding:0;
margin: 0;
}
#NavigationTop ul ul li{
float:none;
width:215px;
border-bottom: 1px solid;
}
#NavigationTop ul li:hover > ul{
display: block;
}
<nav id="NavigationTop">
<div id="main-nav">
<ul>
<li>HOME</li>
<li>BIOGRAPHY</li>
<li>DISCOGRAPHY</li>
<li>MEDIA
<ul>
<li>Audio
<li>Video
<li>Photos
</ul></li>
<li>CONTACT</li>
</ul>
</div>
</nav>

Answer 3

you can try this one https://jsfiddle.net/mnd1b51y/1/
#NavigationTop ul li { position: relative;}
#NavigationTop ul li:hover > ul {
left: 0;
max-width: 210px;
position: absolute;
top: 51px;
}

Answer 4

In #NavigationTop ul class remove padding-left:0 because by default ul takes padding and the default seems to be padding-left:40px for ul.
#NavigationTop ul{
list-style: none;
position:relative;
margin:0 auto;
padding-right: 1px;
width: 1075px;
overflow:auto;
padding-left:0;
}
#NavigationTop ul a{
color:#ffffff;
text-decoration:none;
font-weight:700;
font-size:15px;
padding:0 15px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
line-height: 50px;
text-transform: uppercase;
}
#NavigationTop ul li{
background-color: #343434;
width: 215px;
height: 50px;
position:relative;
float: left;
margin:0 auto;
text-align: center;
border-top: 1px solid #000000;
border-bottom: 1px solid #000000;
}
#NavigationTop ul li:hover{
background-color: lightseagreen;
}
#NavigationTop ul li a:visited{
color: #ffffff
}
#NavigationTop ul ul{
display:none;
position:absolute;
top:100%;
left:0;
padding:0;
margin: 0;
}
#NavigationTop ul ul li{
float:none;
width:215px;
border-bottom: 1px solid;
}
#NavigationTop ul li:hover > ul{
display: block;
}
<nav id="NavigationTop">
<div id="main-nav">
<ul>
<li>HOME</li>
<li>BIOGRAPHY</li>
<li>DISCOGRAPHY</li>
<li>MEDIA
<ul>
<li>Audio
<li>Video
<li>Photos
</ul>
</li>
<li>CONTACT</li>
</ul>
</div>
</nav>