CSS - How can I push the submenus to the left? - html

Question

I have created a horizontal menu with a horizontal submenu. Though I want all the submenus to be pushed to the left, just like the first submenu. How can I do that? I'm very (very) new to CSS.
I have this HTML code:
<div id="menu">
<ul>
<li>Link 1
<ul>
<li>Link 1-1</li>
<li>Link 1-2</li>
<li>Link 1-3</li>
</ul>
</li>
<li>Link 2
<ul>
<li>Link 2-1</li>
<li>Link 2-2</li>
<li>Link 2-3</li>
</ul>
</li>
<li>Link 3
<ul>
<li>Link 3-1</li>
<li>Link 3-2</li>
<li>Link 3-3</li>
</ul>
</li>
</ul>
</div>
And I have this CSS code:
#menu{
padding:0;
margin:0;
overflow:hidden;
height:60px;
}
#menu ul{
padding:0;
margin:0;
}
#menu li{
position: relative;
float: left;
list-style: none;
margin: 0;
padding:0;
}
#menu li a{
width:100px;
height: 30px;
display: block;
text-decoration:none;
text-align: center;
line-height: 30px;
background-color: black;
color: white;
}
#menu li a:hover{
background-color: red;
}
#menu ul ul{
position: absolute;
top: 30px;
visibility: hidden;
width: 600px;
}
#menu ul li:hover ul{
visibility:visible;
display: inline;
}

Answer 1

Remove position: relative from #menu li and add it to #menu ul instead. Also add left: 0 to #menu ul ul:
#menu ul{
padding:0;
margin:0;
position: relative; /* add this */
}
#menu li{
/* position: relative; //remove this */
float: left;
list-style: none;
margin: 0;
padding:0;
}
#menu ul ul{
position: absolute;
left: 0; /* add this */
top: 30px;
visibility: hidden;
width: 600px;
}
Working example: http://jsfiddle.net/WJN4G/

Answer 2

move the positioning from #menu li to #menu ul and add left:0; to #menu ul ul
The left:0; causes the element (#menu ul ul) to be aligned with it's first parent having a position other then static (which is the default). That's why you need to move the position:relative on element up to the #menu ul, so all the child ul align to the left edge of the parent ul.
#menu ul{
padding:0;
margin:0;
position: relative; /* <- moved */
}
#menu li{
position: relative; /* <- deleted */
float: left;
list-style: none;
margin: 0;
padding:0;
}
#menu ul ul{
position: absolute;
left:0; /* <- added */
top: 30px;
visibility: hidden;
width: 600px;
}
here is your modified fiddle