How do I make the box smaller in html? - html

Question

In my code, I have a drop-down menu. However, the grey box extends to the end of the screen. How can I limit the grey box?
Code from here: http://cssdeck.com/labs/7rsznauv
HTML:
<nav>
<ul class="cf">
<li><a class="dropdown" href="#">Menu Item 2</a>
<ul>
<li>Sub-menu Item 1</li>
<li>Sub-menu Item 2</li>
<li>Sub-menu Item 3</li>
</ul>
</li>
</ul>
</nav>
CSS:
nav ul {
-webkit-font-smoothing:antialiased;
text-shadow:0 1px 0 #FFF;
background: #ddd;
list-style: none;
margin: 0;
padding: 0;
width: 100%;
}
nav li {
float: left;
margin: 0;
padding: 0;
position: relative;
min-width: 25%;
}
nav a {
background: #ddd;
color: #444;
display: block;
font: bold 16px/50px sans-serif;
padding: 0 25px;
text-align: center;
text-decoration: none;
-webkit-transition: all .25s ease;
-moz-transition: all .25s ease;
-ms-transition: all .25s ease;
-o-transition: all .25s ease;
transition: all .25s ease;
}
nav .dropdown:after {
content: ' ▶';
}
nav .dropdown:hover:after{
content:'\25bc'
}
nav li:hover a {
background: #ccc;
}
nav li ul {
float: left;
left: 0;
opacity: 0;
position: absolute;
top: 35px;
visibility: hidden;
z-index: 1;
-webkit-transition: all .25s ease;
-moz-transition: all .25s ease;
-ms-transition: all .25s ease;
-o-transition: all .25s ease;
transition: all .25s ease;
}
nav li:hover ul {
opacity: 1;
top: 50px;
visibility: visible;
}
nav li ul li {
float: none;
width: 100%;
}
nav li ul a:hover {
background: #bbb;
}
/* Clearfix */
.cf:after, .cf:before {
content:"";
display:table;
}
.cf:after {
clear:both;
}
.cf {
zoom:1;
}​

Answer 1

nav ul {
-webkit-font-smoothing:antialiased;
text-shadow:0 1px 0 #FFF;
background: #ddd;
list-style: none;
margin: 0;
padding: 0;
width: 90%; // I made it 90% you can make it even narrower
}
Just reduce the width by reducing the percentage or like width: 180px;

Answer 2

just change the width in hnav ul{....}, actually is 100%, change it to 50% or whatever you want