PHP PHP Styles for ACF Backend in WordPress 5.0

Add custom styles to the ACF backend in WordPress 5.0 to improve editor visibility and distinguish different parts of the editor.

function my_acf_admin_head() {
?>
<style type="text/css">
    .acf-flexible-content .layout .acf-fc-layout-handle{
        background-color: #f1f1f1;
	    border-style: solid;
	    border-width: 1px;
	    border-color: #d3d3d3;
	    padding: 20px;
    }
    
    .acf-repeater .acf-row-handle span{
	    font-weight: normal;
	    margin-top: 50%;
	    font-size: 16px;
	    display: block;
	    position: relative;
    }
    
    .acf-flexible-content .layout{
	    border: none;
    }
    
    .hndle.ui-sortable-handle{
	    background-color: #f1f1f1;
	    margin: 0 0 20px 0;
	    border-style: solid;
	    border-width: 1px;
	    border-color: #d3d3d3;
    }
    
    .ui-sortable .acf-fields > .acf-field{
	    border-top: none;
	    transition:all 0.5s;
	    padding: 20px;
    }
    
    .ui-sortable .acf-fields > .acf-field:hover{
	    -webkit-box-shadow:inset 0 0 10px 0 #ccc;
		box-shadow:inset 0 0 10px 0 #ccc;
     }
    
	.acf-actions{
		padding: 10px;
	}
    
    .hndle.ui-sortable-handle span{
	    color: #000;
    }

    .acf-repeater.-row > table > tbody > tr > td,
    .acf-repeater.-block > table > tbody > tr > td {
        border-top: 1px solid #ccc;
    }

    .acf-repeater .acf-row-handle {
        vertical-align: top !important;
        padding-top: 16px;
    }

    .acf-repeater .acf-row-handle span {
        font-size: 20px;
        font-weight: bold;
        color: #202428;
    }

    .imageUpload img {
        width: 75px;
    }

    .acf-repeater .acf-row-handle .acf-icon.-minus {
        top: 30px;
    }
    
    .edit-post-meta-boxes-area .postbox{
	    display: block;
	    position: relative;
	    clear: both;
	    margin: 0 0 20px 0;
    }
    
    .acf-fields > .acf-field{
	    border-style: solid;
	    border-width: 1px;
	    border-color: #d3d3d3;
    }
    
    
    .acf-postbox > .hndle .acf-hndle-cog {
    	color: #000 !important;
    }
    
    .edit-post-meta-boxes-area .postbox>.inside{
	    border-bottom: none;
    }

</style>
<?php
}

add_action('acf/input/admin_head', 'my_acf_admin_head');