td.details-control {
  background: url('/pracownicy/details_open.png') no-repeat center center;
  cursor: pointer;
}

tr.shown td.details-control {
  background: url('/pracownicy/details_close.png') no-repeat center center;
}

.details-control span {
  display: none;
}

/*thead.center_head
{
  text-align: center;
}*/

table.center_table tbody tr, tr.odd, tr.even
{
  text-align: center;
}

/*
div.srodek
{
	margin: auto;
	max-width: 75%;
}*/

.loader {
		/*margin: auto;*/
        display: inline-block;
        border: 3px solid #f3f3f3;
        border-radius: 50%;
        border-top: 3px solid #3b6da7;
        width: 15px;
        height: 15px;
        -webkit-animation: spin 0.5s linear infinite; /* Safari */
        animation: spin 0.5s linear infinite;
      }
      
      /* Safari */
      @-webkit-keyframes spin {
        0% { -webkit-transform: rotate(0deg); }
        100% { -webkit-transform: rotate(360deg); }
      }
      
      @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
      }