The :Target Modal Dialog Box

Although this example may have a very complicated stylesheet, it does show how the :target selector can also be used to create a modal, or dialog box:

HTML file: Displayed by browser:
<style>
/* Add animation (Chrome, Safari, Opera) */
@-webkit-keyframes example {
    from {top:-100px;opacity: 0;}
    to {top:0px;opacity:1;}
}
/* Add animation (Standard syntax) */
@keyframes example {
    from {top:-100px;opacity: 0;}
    to {top:0px;opacity:1;}
}
/* The modal's background */
.modal {
    display: none;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0, 0, 0);
    background-color: rgba(0, 0, 0, 0.4);
}
/* Display the modal when targeted */
.modal:target {
    display: table;
    position: absolute;
}
/* The modal box */
.modal-dialog {
    display: table-cell;
    vertical-align: middle;
} /* The modal's content */
.modal-dialog .modal-content {
    border: margin: auto;
    background-color: #f3f3f3;
     position: relative;
    padding: 0;
    outline: 0;
    border: 1px #777 solid;
    text-align: justify;
     width: 80%;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    /* Add animation */
    -webkit-animation-name: example; /* Chrome, Safari, Opera */
    -webkit-animation-duration: 0.5s; /* Chrome, Safari, Opera */
    animation-name: example;
    animation-duration: 0.5s;
}
/* The button used to close the modal */
.closebtn {
    text-decoration: none;
    float: right;
    font-size: 35px;
    font-weight: bold;
    color: #fff;
}
.closebtn:hover,
.closebtn:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}
.container {
    padding: 2px 16px;
}
header {
    background-color: #5cb85c;
    font-size: 25px;
    color: white;
}
footer {
    background-color: #5cb85c;
    font-size: 20px;
    color: white;
}
</style>
<body>
<a href="#id01">Open Modal</a>
<div id="id01" class="modal">
  <div class="modal-dialog">
    <div class="modal-content">
      <header class="container">
        <a href="#" class="closebtn">×</a>
        <h2>Modal Header</h2>
      </header>
      <div class="container">
        <p>Some text in the modal.</p>
        <p>Some text in the modal.</p>
      </div>
      <footer class="container">
        <p>Modal footer</p>
      </footer>
    </div>
  </div>
</div>
</body> 		Open Modal

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