The grid is based on CONTAINER and ITEM.
Every parent Div must have the CONTAINER class, as in the example below.
<div class="container"> <div class=""> ... </div> </div>
<div class="container wrap center-center"> <div class=""> ... </div> </div>
<div class="container wrap center-center"> <div class=" flex basis3"> ... </div> <div class=" flex basis3"> ... </div> <div class=" flex basis3"> ... </div> </div>
<div class="container"> <div class="basis1"> ... </div> <div class="flex"> ... </div> </div>
<div class="container"> <div class="basis2"> ... </div> <div class="basis3"> ... </div> <div class="flex basis4"> ... </div> </div>
<div class="container"> <div class="basis2"> ... </div> <div class="flex basis5"> ... </div> </div>
<div class="container space-between"> <div class="basis1"> ... </div> <div class="basis5"> ... </div> </div>
<div class="container"> <div class="basis2"> ... </div> <div class="basis3"> ... </div> <div class="basis1"> ... </div> <div class="flex basis1"> ... </div> </div>
<div class="container center-center"> <div class="basis2"> ... </div> <div class="basis3"> ... </div> <div class="basis2"> ... </div> </div>
<div class="container center-center"> <div class="basis1"> ... </div> <div class="basis5"> ... </div> </div>