html {
    position: relative;
    min-height: 100%;
}

body {
    margin-bottom: 50px;
}

div.dt-info {
  text-align: center;
}

tr.header
{
    cursor:pointer;
}
.header .sign:after{
  content: "\F229";
  font-family: "bootstrap-icons";
  display: inline-block;
}
.header.expand .sign:after{
  content: "\F231";
  font-family: "bootstrap-icons";
 }

.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 40px;
    background-color: #f5f5f5;
    text-align: center;
}