"Inner" CSS Not Overriding "Outer" CSS - html

Question

I have some nested tables where there is one outer, container table, two column tables nested in the outer table, and then various tables stacked on each other in the columns. Here is the relevant HTML:
<table class="outer">
<tr>
<td>
<table class="column" id="left_column">
<tr>
<td>
<table class="cell" id="t1">
<tr><td><asp:Literal runat="server" ID="t1r2c0" /></td><td><asp:Literal runat="server" ID="t1r2c1" /></td><td class="image"><span id="s1" runat="server"><asp:PlaceHolder ID="p1" runat="server"></asp:PlaceHolder></span></td><td><asp:Literal runat="server" ID="t1r2c3" /></td><td class="gray"><asp:Literal runat="server" ID="t1r2c4" /></td></tr>
</table>
</td>
</tr>
<tr>
<td>
<table class="cell" id="t2">
</table>
</td>
</tr>
</table>
</td>
<td>
<table class="column" id="rightColumn">
<tr>
<td>
<table class="cell" id="t3">
</table>
</td>
</tr>
<tr>
<td>
<table class="cell" id="t4">
</table>
</td>
</tr>
<tr>
<td>
<table class="cell" id="t5">
</table>
</td>
</tr>
<tr>
<td>
<table class="cell" id="t6">
</table>
</td>
</tr>
<tr>
<td>
<table class="cell" id="t7">
</table>
</td>
</tr>
<tr>
<td>
<table class="cell" id="t8">
</table>
</td>
</tr>
<tr>
<td>
<table class="messages" id="t9">
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
And here is the relevant CSS:
.cell
{
border: none;
}
.cell td
{
border-collapse: collapse;
border: 2px solid black;
text-align: center;
vertical-align: middle;
padding: 2px;
}
.image
{
padding: 0;
margin: 0;
width: 65px;
}
My problem is that the image tds have a padding of 2px. My understanding was that the CSS for .image -- being more specific -- should override the CSS for ".cell td".
Any advice is appreciated.

Answer 1

Specificity isn't determined by how "deep" the elements are, but just by how explicit the selectors are.
The specificity score is based on
the number of ID selectors
otherwise, the number of class/attribute selectors
otherwise, the number of element selectors
.cell td contains a class selector and an element selector
.image contains a class selector and no element selectors
So, the first rule is more specific.