I don't think it's possible in CSS alone.
Here's a JavaScript solution, in which a clone lies behind the element. The element has text-align: justify
and the clone has text-align: center
.
The code then reduces the height of the original element so that only the clone's last line displays.
var p= document.getElementById('lorem'),
clone= document.createElement('p');
clone.textContent= p.textContent;
clone.className= 'clone';
p.parentNode.insertBefore(clone, p);
p.style.height= p.offsetHeight - 14 + 'px';
#lorem, .clone {
position: absolute;
line-height: 14px;
font: 14px arial;
width: 500px;
}
#lorem {
text-align: justify;
overflow: hidden;
background: white;
}
.clone {
text-align: center;
}
<p id="lorem">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
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