Forum OpenACS Development: changes are not getting applied of lists.css

Hello everyone,
Will anybody help me to know, why my changes are not getting applied of lists.css?

I am trying to reduce the padding of td.

The code, I am modifying is:

td.list-table, td.list-table-narrow, .list-table td {
padding: 8px 16px;
border-bottom: 1px solid #A0BDEB;
}

I want to reduce this padding.
I am changing the value but it is not getting applied.

Plz, help me out!