<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<!--col gap 40px -->
<div class="mb-20 text-center"><h3>Space between columns 50px</h3></div>
<div class="container col-gap-50">
<div class="row text-center">
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
</div>
</div>
<!--col gap 10px -->
<div class="mb-20 text-center"><h3>Space between columns 10px</h3></div>
<div class="container col-gap-10 ">
<div class="row text-center">
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
</div>
</div>
<!--col gap 80px -->
<div class="mb-20 text-center"><h3>Space between columns 80px</h3></div>
<div class="container col-gap-80">
<div class="row text-center">
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
<div class="col-md-4">
<div class="wrap">
<h2>Hallo wereld.</h2>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
<a href="#">Button</a>
</div>
</div>
</div>
</div>
/*####################### gap css ####################*/
/*col gap 5px */
.col-gap-5.container div[class*="col"] { padding-left: 2.5px !important; padding-right: 2.5px !important; }
.col-gap-5.container > .row { margin-left: -17.px !important; margin-right: -17.5px !important; }
/*col gap 10px */
.col-gap-10.container div[class*="col"] { padding-left: 5px !important; padding-right: 5px !important; }
.col-gap-10.container > .row { margin-left: -20px !important; margin-right: -20px !important; }
/*col gap 15px */
.col-gap-15.container div[class*="col"] { padding-left: 7.5px !important; padding-right: 7.5px !important; }
.col-gap-15.container > .row { margin-left: -22.5px !important; margin-right: -22.5px !important; }
/*col gap 20px */
.col-gap-20.container div[class*="col"] { padding-left: 10px !important; padding-right: 10px !important; }
.col-gap-20.container > .row { margin-left: -25px !important; margin-right: -25px !important; }
/*col gap 25px */ .col-gap-25.container div[class*="col"] { padding-left: 12.5px !important; padding-right: 12.5px !important; }
.col-gap-25.container > .row { margin-left: -27.5px !important; margin-right: -27.5px !important; }
/*col gap 30px */
.col-gap-30.container div[class*="col"] { padding-left: 15px !important; padding-right: 15px !important; }
.col-gap-30.container > .row { margin-left: -30px !important; margin-right: -30px !important; }
/*col gap 35px */
.col-gap-35.container div[class*="col"] { padding-left: 17.5px !important; padding-right: 17.5px !important; }
.col-gap-35.container > .row { margin-left: -32.5px !important; margin-right: -32.5px !important; }
/*col gap 40px */
.col-gap-40.container div[class*="col"] { padding-left: 20px !important; padding-right: 20px !important; }
.col-gap-40.container > .row { margin-left: -35px !important; margin-right: -35px !important; }
/*col gap 45px */
.col-gap-45.container div[class*="col"]{ padding-left: 22.5px !important; padding-right: 22.5px !important; }
.col-gap-45.container > .row { margin-left: -37.5px !important; margin-right: -37.5px !important; }
/*col gap 50px */
.col-gap-50.container div[class*="col"]{ padding-left: 25px !important; padding-right: 25px !important; }
.col-gap-50.container > .row { margin-left: -40px !important; margin-right: -40px !important; }
/*col gap 60px */
.col-gap-60.container div[class*="col"]{ padding-left: 30px !important; padding-right: 30px !important; }
.col-gap-60.container > .row { margin-left: -45px !important; margin-right: -45px !important; }
/*col gap 70px */
.col-gap-70.container div[class*="col"]{ padding-left: 35px !important; padding-right: 35px !important; }
.col-gap-70.container > .row { margin-left: -50px !important; margin-right: -50px !important; }
/*col gap 80px */
.col-gap-80.container div[class*="col"]{ padding-left: 40px !important; padding-right: 40px !important; }
.col-gap-80.container > .row { margin-left: -55px !important; margin-right: -55px !important; }
/*col gap 90px */
.col-gap-90.container div[class*="col"]{ padding-left: 45px !important; padding-right: 45px !important; }
.col-gap-90.container > .row { margin-left: -60px !important; margin-right: -60px !important; }
/*col gap 100px */
.col-gap-100.container div[class*="col"]{ padding-left: 50px !important; padding-right: 50px !important; }
.col-gap-100.container > .row { margin-left: -65px !important; margin-right: -65px !important; }
/*################ Optional Style ##################*/
body{background:#f9f9f9;}
.row .col-md-4 .wrap{color:#555;padding:20px 15px;}
.row .col-md-4 .wrap h2{margin:0px 0px 5px}
.row .col-md-4 .wrap a{background:#fff;padding:7px 30px;display:inline-block;
margin:0px 0px 10px;}
.container{margin-bottom:50px;}
.mb-20{margin-bottom:20px;}
img{max-width:100%;}
.row .col-md-4 .wrap{border-bottom: 1px solid #CFCFCF;
box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 1px 5px 0 rgba(0, 0, 0, 0.12);
-moz-box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 1px 5px 0 rgba(0, 0, 0, 0.12);
-webkit-box-shadow: 0px 1px 2px 0px rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 1px 5px 0 rgba(0, 0, 0, 0.12);
border-radius: 3px;
border-color: rgb(119, 119, 119) rgb(119, 119, 119) #03A8F4 rgb(119, 119, 119);
border-style: none none solid none;
border-width: 0 0 5px 0;
background:#fff;
}
.row .col-md-4 .wrap a{padding: 7px 20px;
border-radius: 2px;background-color: #03a9f4;
color: #ffffff;line-height:1.3;}