Reply To: CSS to affect only to left OR right sidebar

[Tom]

If you’re only wanting to apply it to one specific widget, you can use the ID there (slideshowwidget-2).

So it would be:

.widget#slideshowwidget-2 {
    padding: 0;
}

If you want to apply it to all left sidebar widgets, this should do it:

.inside-left-sidebar .widget {
    padding: 0;
}