DEMO
styles can be applied to the children nodes based on the number of
siblings they have.
html
<ul>
<li>one item</li>
</ul>
<ul>
<li>two items</li>
<li>two items</li>
</ul>
<ul>
<li>three items</li>
<li>three items</li>
<li>three items</li>
</ul>
<ul>
<li>four items</li>
<li>four items</li>
<li>four items</li>
<li>four items</li>
</ul>
css
li:first-child:nth-last-child(1) {
margin-left: 0px;
}
li:first-child:nth-last-child(2) ~ li {
margin-left: 0px;
}
li:first-child:nth-last-child(3) ~ li {
margin-left: 0px;
}
li:first-child:nth-last-child(4) ~ li {
margin-left: 0px;
}
li:first-child:nth-last-child(4) {
margin-left:10px;
color:red;
}
li:first-child:nth-last-child(3) {
margin-left:20px;
color:green;
}
li:first-child:nth-last-child(2) {
margin-left:30px;
color:blue;
}
li:first-child:nth-last-child(1) {
margin-left:40px;
color:gray;
}
ref : Can CSS detect the number of children an element has?