<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>CSS Modal</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <div id="css-modal">
    <input id="modal" class="css-modal-check" type="checkbox" checked />
    <div class="css-modal">
      <label for="modal" class="close"></label>
      <h2>Premium Member Area</h2>
      <p>Gain instant access to publish content to this area and more by upgrading your basic membership to premium.
      </p>
      <div class="css-modal-btn"><a href="/#" title="Upgrade"><button class="btn btn-primary btn-md">Upgrade</button></a></div>
    </div>
    <div id="overlay"></div>
  </div>

  <div id="page-wrapper">
    <h1>CSS Modal</h1>
    <p class="center">A modal is a pop up window that appears over the screen, its primary purpose is to grab the user's attention. If you find it useful, please heart it. Thanks!</p>
  </div>
</body>

</html>
@import url(https://fonts.googleapis.com/css?family=Raleway:400,700);

/* Main Styles */
body {
  background-color: #f5f5f5;
  color: #333;
  font-family: "Raleway", Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
}

#page-wrapper {
  padding: 1.5em;
}

p.center {
  text-align: center;
}

h1 {
  color: #0198cc;
  text-align: center;
  text-transform: uppercase;
  font-weight: 400;
}

/* Modal Styles */
#css-modal {
  bottom: 0;
  height: 100%;
  left: 0;
  pointer-events: none;
  position: fixed;
  right: 0;
  text-align: center;
  top: 0;
  white-space: nowrap;
  z-index: 10000000;
}

#css-modal h2 {
  color: #0198cc;
  font-size: 2em;
  letter-spacing: 0.02em;
  padding: 0;
  margin-bottom: 0.5em;
  margin-top: 0;
}

#css-modal .css-modal-check {
  display: none;
  pointer-events: auto;
}

#css-modal .css-modal-check:checked ~ .css-modal {
  opacity: 1;
  pointer-events: auto;
}

#css-modal .css-modal {
  background: #fff;
  border-radius: 3px;
  display: inline-block;
  max-width: 550px;
  opacity: 0;
  padding: 2.25em;
  pointer-events: none;
  position: relative;
  text-align: center;
  vertical-align: middle;
  white-space: normal;
  z-index: 1;
}

#css-modal .css-modal p {
  text-align: left;
}

#css-modal .css-modal .close {
  position: absolute;
  right: 1em;
  top: 0.5em;
}

#css-modal .css-modal .css-modal-btn button {
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-top: 1em;
}

#css-modal .css-modal-check:checked ~ #overlay {
  opacity: 0.8;
  pointer-events: auto;
}

#css-modal #overlay {
  background: #000;
  bottom: 0;
  left: 0;
  opacity: 0;
  position: absolute;
  right: 0;
  top: 0;
  transition: opacity 0.8s;
}

#css-modal:before {
  content: "";
  display: inline-block;
  height: 100%;
  vertical-align: middle;
}

.close:after {
  color: #0198cc;
  content: "\0058";
  float: right;
  font-size: 1.75em;
}

#css-modal .btn-primary {
  color: #fff;
  background-color: #0198cc;
}

#css-modal .btn-primary:hover {
  background-color: #01afea;
}

#css-modal .btn {
  background-image: none;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1em;
  padding: 0.75em 1.25em;
  text-align: center;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

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