HTML
<div class="container">
<div class="interior">
<a class="btn" href="#open-modal"><i class="fas fa-external-link-alt"></i> Basic CSS-Only Modal</a>
</div>
</div>
<div id="open-modal" class="modal-window">
<div>
<a href="#modal-close" title="Close" class="modal-close">Close</a>
<h1>Voilà!</h1>
<div>A CSS-only modal based on the :target pseudo-class. Hope you find it helpful. <a href="https://twitter.com/timothylong" target="_blank">Say hello on Twitter.</div>
</div>
</div>
CSS
.modal-window {
position: fixed;
background-color: rgba(255, 255, 255, 0.25);
top: 0;
right: 0;
bottom: 0;
left: 0;
z-index: 999;
opacity: 0;
pointer-events: none;
transition: all 0.3s;
}
.modal-window:target {
opacity: 1;
pointer-events: auto;
}
.modal-window > div {
width: 400px;
position: absolute;
top: 50%;
left: 50%;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
padding: 2em;
background: #ffffff;
color: #333333;
}
.modal-window header {
font-weight: bold;
}
.modal-window h1 {
font-size: 150%;
margin: 0 0 15px;
color: #333333;
}
.modal-close {
color: #aaa;
line-height: 50px;
font-size: 80%;
position: absolute;
right: 0;
text-align: center;
top: 0;
width: 70px;
text-decoration: none;
}
.modal-close:hover {
color: #000;
}
/* Demo Styles */
html,
body {
height: 100%;
}
body {
font: 600 18px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
background-color: #f69d75;
color: #555555;
}
a {
color: inherit;
}
.container {
display: grid;
justify-content: center;
align-items: center;
height: 100vh;
}
.btn {
background-color: #fff;
padding: 1em 1.5em;
border-radius: 3px;
text-decoration: none;
}
.btn i {
padding-right: 0.3em;
}
{ } JS
Preview