Clipping an animated div - html

Question

I'm trying to create a nice old CRT "tv" effect using animation in CSS, but having some problems with the scanlines displaying above and below the intended div.
What I have is a landing page that has 4 divs that link to other areas of the site. The 1st 2 divs are "TVs" each have a background showing the "tv" (static image) of the content of the link.
On a desktop or other larger screen, the 4 divs are displayed as 2x2, on a smaller screen it's shown in a 1x4 format.
I've created a single image that will be animated with css to fake the moving scanlines moving down the 1st 2 divs.
What's happening is that the "scanlines" appear above the "TVs" and move to below the "TVs".
You can see what's happening on JSFiddle:
http://jsfiddle.net/blyzz/ynekxcud/2/
Here's some cleansed HTML code:
<a href="URL1" target="_blank">
<div class="content" id="outside">
<div class="scanlines">
<div class="aniscan" id="aniscanout">
</div>
<div class="aniscan" id="aniscanout2">
</div>
</div>
</div>
</a>
<a href="URL2" target="_blank">
<div class="content" id="inside">
<div class="scanlines">
<div class="aniscan" id="aniscanin">
</div>
<div class="aniscan" id="aniscanin2">
</div>
</div>
</div>
</a>
and the accompanying cleansed CSS:
.content{
width: 300px;
min-width: 300px;
height: 125px;
min-height: 125px;
float:left;
margin: 5px;
border: 3px solid #555555;
z-index: -100;
}
.scanlines{
width: 100%;
height: 100%;
background-repeat: repeat;
z-index: 100;
}
.aniscan{
width: 100%;
height: 100%;
background-image: url('http://www.oocities.org/~special_effect/holo_scanlines.jpg');
background-repeat: repeat-x;
z-index: 200;
position: relative;
opacity:0.6;
}
#inside {
background-image: url('http://www.clipartbest.com/cliparts/xig/7rM/xig7rMriA.png');
border-radius: 0px 15px 0px 0px;
}
#outside{
background-image: url('http://cdn.graphicsfactory.com/clip-art/image_files/image/6/1347556-2587-Royalty-Free-Dog-With-Big-Bone-In-Mouth.jpg');
border-radius: 15px 0px 0px 0px;
}
#aniscanin{
-webkit-animation: mymove 5.2s linear infinite;
-moz-animation: mymove 5.2s linear infinite;
-o-animation: mymove 5.2s linear infinite;
animation: mymove 5.2s linear infinite;
}
#aniscanin2{
-webkit-animation: mymoveb 5.2s linear infinite;
-moz-animation: mymoveb 5.2s linear infinite;
-o-animation: mymoveb 5.2s linear infinite;
animation: mymoveb 5.2s linear infinite;
}
#aniscanout{
-webkit-animation: mymove 4.8s linear infinite;
-moz-animation: mymove 4.8s linear infinite;
-o-animation: mymove 4.8s linear infinite;
animation: mymove 4.8s linear infinite;
}
#aniscanout2{
-webkit-animation: mymoveb 4.8s linear infinite;
-moz-animation: mymoveb 4.8s linear infinite;
-o-animation: mymoveb 4.8s linear infinite;
animation: mymoveb 4.8s linear infinite;
}
#-webkit-keyframes mymove {
0% {top: -125px;}
100% {top: 0px;}
}
#keyframes mymove {
0% {top: -125px;}
100% {top: 0px;}
}
#-webkit-keyframes mymoveb{
0% {top: -125px;}
100% {top: 0px;}
}
#keyframes mymoveb {
0% {top: -125px;}
100% {top: 0px;}
}
I considered making a "window" with higher z-index divs above and below the 2 TVs, but it doesn't really work well with responsive design.
Any help would be appreciated!
P.S. It'd be nice if i could get the scanlines behind the rounded corners as well, but it's not really a deal-breaker - I can always remove the rounded corners.

Answer 1

You need overflow: hidden in your .content class:
Like this:
.content{
width: 300px;
min-width: 300px;
height: 125px;
min-height: 125px;
float:left;
margin: 5px;
border: 3px solid #555555;
z-index: -100;
overflow: hidden;
}
Fiddle:
http://jsfiddle.net/ynekxcud/3/