CSS3 Child Elements Width Not Respecting Parent Container Width - html

Question

I am trying to keep my ul and li elements that are inside of a div to respect the div's width with margin-left: auto. I am also not wanting ul/li to extend out of the div. I want the ul and li elements to stay inside the div container. From what I have read, this code is correct because I have the child elements contain a width which should be according to div's width.
#phonequeue {
display: block;
width: 400px;
height: 800px;
border-width: 5px;
border-color: white;
border-style: solid;
float: right;
margin-top: -650px;
}
li {
display: block;
padding: 15px;
text-align: left;
height: 1.2 em
padding-left: 15px;
padding-right: 15px;
margin: 0px 0px 4px 0px;
background-color #555
-webkit-border-radius: 15px;
border-radius: 40px;
background: -webkit-gradient(linear, 0% 0%, 0% 30%, from(#444), to(#111));
font-family: verdana, arial, helvetica, sans-serif;
font-size: 22px;
width: 100%;
margin: auto;
}
ul {
list-style-type: none;
width: 100%;
margin: auto;
}
index.html:
<div id="phonequeue">
<ul>
<li class="avail">
<span class="pname">John Doe</span>
<span class="ptime">03:00</span>
</li>
</ul>
</div>
UPDATE: Here is a working example. The element width is 430px; when the parent div is 400px;. I would the child elements to center themselves in div and have their width respecting the parents width. http://jsfiddle.net/FBvQJ/4/

Answer 1

I believe the problem was with the use of width: 100%
Check this jsFiddle and let me know if this answers your question.
This is the updated CSS to solve the overlapping width:
phonequeue {
display: block;
width: 200px;
border: 1pt solid green;
}
ul{
border: 1pt solid red;
list-style-type: none;
margin: auto;
padding: 0;
}
li {
display: block;
padding: 15px;
text-align: left;
height: 1.2em;
margin: 0px 0px 4px 0px;
-webkit-border-radius: 15px;
font-size: 22px;
margin: auto;
border: 1pt solid #ccc;
}
I don't think you need to define the full width for each element.

Answer 2

If you'd like the text centered in the DIV, remove the width on the LI tag and make the margin:
margin: 0px auto 4px auto;
That will center the text within the div.

Answer 3

If I'm understanding your question correctly (which is dubious) I believe you can achieve the centering you require by removing the 100% widths and using text-align:center:
li {
display: block;
padding: 15px;
text-align: left;
height: 1.2 em;
padding-left: 15px;
padding-right: 15px;
margin: 0px auto 4px auto;
background-color #555;
-webkit-border-radius: 15px;
border-radius: 40px;
background: -webkit-gradient(linear, 0% 0%, 0% 30%, from(#444), to(#111));
font-family: verdana, arial, helvetica, sans-serif;
font-size: 22px;
text-align:center; /* < this (or not, if you don't actually want it centred after all) */
}
ul {
list-style-type: none;
padding:0; /* < and this */
margin: 0;
}
Demo fiddle
And later, when you decide that you want the time on the right use
.ptime {float:right;}
example