Task List Test

HTML

<!DOCTYPE html>
<html lang="en">
    <head>
        <!-- Stylesheets -->
    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/5.0.1/css/bootstrap.min.css"/>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.25/css/dataTables.bootstrap5.min.css"/>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/buttons/1.7.1/css/buttons.bootstrap5.min.css"/>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/datetime/1.1.0/css/dataTables.dateTime.min.css"/>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/responsive/2.2.9/css/responsive.bootstrap5.min.css"/>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/rowgroup/1.1.3/css/rowGroup.bootstrap5.min.css"/>
<link href="https://code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css" rel="stylesheet"/>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/select/1.3.3/css/select.bootstrap4.min.css"/>


 
<script type="text/javascript" src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/5.0.1/js/bootstrap.bundle.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jszip/2.5.0/jszip.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.36/pdfmake.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.36/vfs_fonts.js"></script>
<script type="text/javascript" src="https://cdn.datatables.net/1.10.25/js/jquery.dataTables.min.js"></script>
<script type="text/javascript" src="https://cdn.datatables.net/1.10.25/js/dataTables.bootstrap5.min.js"></script>
<script type="text/javascript" src="https://cdn.datatables.net/buttons/1.7.1/js/dataTables.buttons.min.js"></script>
<script type="text/javascript"...

CSS

tr.selected {
      background-color: #acbad5;
}
select-checkbox sorting_1 {
  float: left;
}
h1 {
  text-align: center;
}
 h5{
     text-align: center;
     font-size: 40px;
}
 .dataTable > thead > tr > th[class*="sort"]:before, .dataTable > thead > tr > th[class*="sort"]:after {
     content: "" !important;
}
 .right {
     float: right;
}
 .toolbar{
     float: left;
}
 .FilterStuff>div{
    float:none;
}
 .dataTables_wrapper .FilterStuff .dataTables_filter {
    float:left
}
 .title {
     position: relative;
     background-color: lightgrey;
     color: #fff;
     border-radius: 0px;
     padding: 20px;
     font-size: 150%;
     border: 1px solid black;
}
 .btn{
     padding: 4px 12px;
     margin-bottom: 0;
     font-size: 14px;
     line-height: 20px;
     color: #333333;
     text-align: center;
     text-shadow: 0 1px 1px rgba(255, 255, 255, 0.75);
     vertical-align: middle;
     cursor: pointer;
     background-color: #f5f5f5;
     border: 1px solid #B7DDF2;
}
 .table th {
     text-align: center;
}
 .table td{
     padding: 10px;
}
 .dtrg-level-0::after {
     text-align: center;
}
table.dataTable tbody td.select-checkbox,
table.dataTable thead th.select-checkbox {
  position: relative;
}
table.dataTable tbody td.select-checkbox:before, 
table.dataTable tbody td.select-checkbox:after,
table.dataTable thead th.select-checkbox:before,
table.dataTable thead th.select-checkbox:after {
  display: block;
  position: absolute;
  top: 1.2em;
  left: 50%;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
}
table.dataTable tbody td.select-checkbox:before,
table.dataTable thead th.select-checkbox:before {
  content: ' ';
  margin-top: -6px;
  margin-left: -6px;
  border: 1px solid black;
  border-radius: 3px;
}


 .btn:hover{
     color: #333333;
     background-color: #e6e6e6;
}
 th {
     font-size: 14px;
}
 td {
     font-size: 12px;
     text-align: center;
}
 div.container {
     min-width: 980px;
     margin: 0 auto;
}
 body {
     font:...