Hover on div element does not do the effect individually - html

Question

I have multiple divs with the same class of "product". When I hover on each product element, I need them to have a hover effect, but the problem is that when I hover over the first element, all other elements also have the effect applied rather than just the one i hovered. What am i doing wrong?
<style>
div.product{
width:90%;
margin:10px auto;
height: 200px;
transition: all 0.1s ease;
background-color: #069;
}
div.product:hover{
margin-top:-5px;
}
.img_box{
width:50%;
height:100%;
padding: 10px;
float:left;
box-sizing: border-box;
}
.desc_box{
width:50%;
height:100%;
float:left;
padding: 10px;
box-sizing: border-box;
}
.img{
background-color: #b65050;
height: 100%;
}
.desc{
background-color: chocolate;
height: 100%;
}
</style>
HTML:
<div>
<div class="product">
<div class="img_box">
<div class="img">
image
</div>
</div>
<div class="desc_box">
<div class="desc">
desc
</div>
</div>
</div>
<div class="product">
<div class="img_box">
<div class="img">
image
</div>
</div>
<div class="desc_box">
<div class="desc">
desc
</div>
</div>
</div>
<div class="product">
<div class="img_box">
<div class="img">
image
</div>
</div>
<div class="desc_box">
<div class="desc">
desc
</div>
</div>
</div>
<div class="product">
<div class="img_box">
<div class="img">
image
</div>
</div>
<div class="desc_box">
<div class="desc">
desc
</div>
</div>
</div>
</div>
heres my fiddle: MY FIDDLE

Answer 1

This is because you are floating the divs. Changing margin-top moves the element which creates room underneath it.
What you need is this:
div.product{
position:relative;
}
div.product:hover{
top:-5px;
}
position:relative basically takes up the original space but lets the div to be rendered elsewhere.