Css – How to stop a CSS layout from distorting when zooming in/out

cssdistortionzooming

I've set up a very basic site with a #container div that includes the #navbar and #content. However, when I zoom in or out, the #navbar distorts, if I zoom in the links get pushed down below each other instead of being inline. If I zoom out, too much padding is added between the links. How can I stop this?

HTML:

<div id="navbar">
<ul>
    <li><a href="index.html">Home</a></li>
    <li><a href="top.html">Top</a></li>
    <li><strong><a href="free.html">FREE</a></strong></li>
    <li><a href="photo.html">Photo</a></li>
    <li><a href="about.html">About</a></li>
    <li><a href="contact.html">Contact Us</a></li>
</ul>
</div>

<div id="content">

<p>Some sample text.<p>

</div>


</div>

CSS:

#container {

    position: static;
    background-color: #00bbee;
    margin-left: 20%;
    margin-right: 20%;
    margin-top: 7%;
    margin-bottom: 15%;
    border: 2px solid red;


}

#navbar  ul{

    list-style: none;



}

#navbar  li{

    display: inline;

}

#navbar li a{

    text-decoration: none;
    color: #11ff11;
    margin: 3%;
    border: 1px dotted orange;
    padding-left: 4px;

}

#navbar li a:hover {

    background-color: white;
    color: green;

}

#navbar {

    background-color: #eeeeee;
    padding-top: 2px;
    padding-bottom: 5px;
    border: 1px solid yellow;

}

How can I stop it from distorting?

Also, I'm still pretty new to CSS, I was taught to use % instead of px. Is that right? Also anything else you've got to point out, please let me know.

Thanks in advance!

Best Solution

As this question still gets constant views, I'll post the solution I use currently.

CSS Media Queries:

@media screen and (max-width: 320px) { 

/*Write your css here*/

}

@media screen and (max-width: 800px) { 

}

Check out: CSS-Tricks + device sizes and Media Queries