<div class="p-4">

<div class="sortable-list mb-2 p-2 border border-primary" id="list1">

  <div class="sortable-item bg-white p-4 border m-2">1.1</div>

  <div class="sortable-item bg-white p-4 border m-2">1.2</div>

</div>

​

<div class="sortable-list mb-2 p-2 border border-secondary" id="list2">

  <div class="sortable-item  bg-white p-4 border m-2">2.1</div>

  <div class="sortable-item bg-white p-4 border m-2">2.2</div>

</div>

​

<div class="sortable-list border p-2 border-warning" id="list3">

  <div class="sortable-item  bg-white p-4 border m-2">3.1</div>

  <div class="sortable-item  bg-white p-4 border m-2">3.2</div>

  </div>

</div>