pagination style for cakephp 3 and bootstrap 4

gistfile1.txt

.pagination {
  display: flex;
  padding-left: 0;
  list-style: none;
}

.page-item:first-child .page-link, .pagination-datatables li:first-child .page-link, .pagination li:first-child .page-link, .page-item:first-child .pagination-datatables li a, .pagination-datatables li .page-item:first-child a, .pagination-datatables li:first-child a, .page-item:first-child .pagination li a, .pagination li .page-item:first-child a, .pagination li:first-child a {
  margin-left: 0;
}

.page-item.active .page-link, .pagination-datatables li.active .page-link, .pagination li.active .page-link, .page-item.active .pagination-datatables li a, .pagination-datatables li .page-item.active a, .pagination-datatables li.active a, .page-item.active .pagination li a, .pagination li .page-item.active a, .pagination li.active a {
  z-index: 2;
  color: #fff;
  background-color: #20a8d8;
  border-color: #20a8d8;
}

.page-item.disabled .page-link, .pagination-datatables li.disabled .page-link, .pagination li.disabled .page-link, .page-item.disabled .pagination-datatables li a, .pagination-datatables li .page-item.disabled a, .pagination-datatables li.disabled a, .page-item.disabled .pagination li a, .pagination li .page-item.disabled a, .pagination li.disabled a {
  color: #b0bec5;
  pointer-events: none;
  background-color: #fff;
  border-color: #ddd;
}

.page-link, .pagination-datatables li a, .pagination li a {
  position: relative;
  display: block;
  padding: 0.5rem 0.75rem;
  margin-left: -1px;
  line-height: 1.25;
  color: #20a8d8;
  background-color: #fff;
  border: 1px solid #ddd;
}

.page-link:focus, .pagination-datatables li a:focus, .pagination li a:focus, .page-link:hover, .pagination-datatables li a:hover, .pagination li a:hover {
  color: #167495;
  text-decoration: none;
  background-color: #cfd8dc;
  border-color: #ddd;
}

.pagination-lg .page-link, .pagination-lg .pagination-datatables li a, .pagination-datatables li .pagination-lg a, .pagination-lg .pagination li a, .pagination li .pagination-lg a {
  padding: 0.75rem 1.5rem;
  font-size: 1.25rem;
}

.pagination-sm .page-link, .pagination-sm .pagination-datatables li a, .pagination-datatables li .pagination-sm a, .pagination-sm .pagination li a, .pagination li .pagination-sm a {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
}