purely css-html
<div id="openModal" class="modalDialog">
<a href="#openModal" title="Close" class="close">✖</a>
<h3>Modal Box</h3>
<p>This is a sample modal box using the powers of CSS3.</p>
<p>You could do a lot of things here like have a pop-up ad that
shows when your website loads, or create a login/register form for users.</p>
</div>
.modalDialog {
font: 15px calibri ;
width: 400px;
position: relative;
margin: 10% auto;
padding: 2px 20px 13px 20px;
border-radius: 10px;
background: #fff;
opacity:1;
pointer-events: auto;
}
#openModal:target {
pointer-events: none;
z-index: 99999;
opacity:0;
}
a {
float: right;
position: relative;
text-decoration: none;
top: 7px;
font-size: 20px;
font-weight: bold;
}