How To Make Pure CSS3 Pop Up Text Box

How To Use in Blogger Or Website

• First of all Log in To www.blogger.com
• Click Template>>Edit HTML and Press Ctrl+F
• A box will be appear then find ]]></b:skin>
• Then given below code paste before/above on ]]></b:skin>

CSS Code

/*-----------------CSS-Pop-Up-Box----------------*/
/* Container */
.modal {

    /* Overlay page content */
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 10000;

    /* Transition opacity on open */
    -webkit-transition: opacity 500ms ease-in;
    -moz-transition: opacity 500ms ease-in;
    transition: opacity 500ms ease-in;

    /* Hide for now */
    opacity: 0;
    pointer-events: none;
}

/* Show modal */
.modal:target {
    opacity: 1;
    pointer-events: auto;
    /* at time of writing (Feb 2012), pointer-events not supported by Opera or IE */
}

/* Content */
.modal > div {
    width: 500px;
    background: #fff;
    position: relative;
    margin: 10% auto;

    /* Default minimise animation */
    -webkit-animation: minimise 500ms linear;
    -moz-animation: minimise 500ms linear;

    /* Prettify */
    padding: 30px;
    border-radius: 7px;
    box-shadow: 0 3px 20px rgba(0,0,0,0.9);
    background: #fff;
    background: -moz-linear-gradient(#fff, #ccc);
    background: -webkit-linear-gradient(#fff, #ccc);
    background: -o-linear-gradient(#fff, #ccc);
    text-shadow: 0 1px 0 #fff;
}

/* Override animation on modal open */
.modal:target > div {
    -webkit-animation-name: bounce;
    -moz-animation-name: bounce;
}

.modal h2 {
    font-size: 36px;
    padding: 0 0 20px;
}

@-webkit-keyframes bounce {
  0% {
    -webkit-transform: scale3d(0.1,0.1,1);
    box-shadow: 0 3px 20px rgba(0,0,0,0.9);
  }
  55% {
    -webkit-transform: scale3d(1.08,1.08,1);
    box-shadow: 0 10px 20px rgba(0,0,0,0);
  }
  75% {
    -webkit-transform: scale3d(0.95,0.95,1);
    box-shadow: 0 0 20px rgba(0,0,0,0.9);
  }
  100% {
    -webkit-transform: scale3d(1,1,1);
    box-shadow: 0 3px 20px rgba(0,0,0,0.9);
  }
}

@-webkit-keyframes minimise {
  0% {
    -webkit-transform: scale3d(1,1,1);
  }
  100% {
    -webkit-transform: scale3d(0.1,0.1,1);
  }
}

@-moz-keyframes bounce {
  0% {
    -moz-transform: scale3d(0.1,0.1,1);
    box-shadow: 0 3px 20px rgba(0,0,0,0.9);
  }
  55% {
    -moz-transform: scale3d(1.08,1.08,1);
    box-shadow: 0 10px 20px rgba(0,0,0,0);
  }
  75% {
    -moz-transform: scale3d(0.95,0.95,1);
    box-shadow: 0 0 20px rgba(0,0,0,0.9);
  }
  100% {
    -moz-transform: scale3d(1,1,1);
    box-shadow: 0 3px 20px rgba(0,0,0,0.9);
  }
}

@-moz-keyframes minimise {
  0% {
    -moz-transform: scale3d(1,1,1);
  }
  100% {
    -moz-transform: scale3d(0.1,0.1,1);
  }
}

/* Modal close link */
.modal a[href="#close"] {
    position: absolute;
    right: 0;
    top: 0;
    color: transparent;
}

/* Reset native styles */
.modal a[href="#close"]:focus {
    outline: none;
}

/* Create close button */
.modal a[href="#close"]:after {
    content: 'X';
    display: block;

    /* Position */
    position: absolute;
    right: -10px;
    top: -10px;
    width: 1.5em;
    padding: 1px 1px 1px 2px;

    /* Style */
    text-decoration: none;
    text-shadow: none;
    text-align: center;
    font-weight: bold;
    background: #000;
    color: #fff;
    border: 3px solid #fff;
    border-radius: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.5);
    }

    .modal a[href="#close"]:focus:after,
    .modal a[href="#close"]:hover:after {
    -webkit-transform: scale(1.1,1.1);
    -moz-transform: scale(1.1,1.1);
}

.modal a[href="#close"]:focus:after {
    outline: 1px solid #000;
}

/* Open modal */
a.openModal {
    margin: 1em auto;
    display: block;
    width: 200px;
    background: #ccc;
    text-align: center;
    padding: 10px;
    border-radius: 7px;
    background: #fff;
    background: -moz-linear-gradient(#fff, #ddd);
    background: -webkit-linear-gradient(#fff, #ddd);
    background: -o-linear-gradient(#fff, #ddd);
    text-shadow: 0 1px 0 #fff;
    border: 1px solid rgba(0,0,0,0.1);
    box-shadow: 0 1px 1px rgba(0,0,0,0.3);
}

a.openModal:hover,
a.openModal:focus {
    background: -moz-linear-gradient(#fff, #ccc);
    background: -webkit-linear-gradient(#fff, #ccc);
    background: -o-linear-gradient(#fff, #ccc);
}
/*-----------------CSS-Pop-Up-Box----------------*/

HTML CODE

<a href="#example" class="openModal">Open Box</a>
<aside id="example" class="modal">
    <div>
        <h2>BOX Text Below</h2>
        <p>Your Text Here</p>
        <a href="#close" title="Close">Close</a>
    </div>
</aside>

Live Demo