ERROR in CSS pop up - html

Question

I have create a pop up using only CSS and HTML it works fine as i need and here is code
.wrap {
padding: 40px;
text-align: center;
}
hr {
clear: both;
margin-top: 40px;
margin-bottom: 40px;
border: 0;
border-top: 1px solid #aaaaaa;
}
h1 {
font-size: 30px;
margin-bottom: 40px;
}
p {
margin-bottom: 20px;
}
.btn {
background: #428bca;
border: #357ebd solid 1px;
border-radius: 3px;
color: #fff;
display: inline-block;
font-size: 14px;
padding: 8px 15px;
text-decoration: none;
text-align: center;
min-width: 60px;
position: relative;
transition: color .1s ease;
}
.btn:hover {
background: #357ebd;
}
.btn.btn-big {
font-size: 18px;
padding: 15px 20px;
min-width: 100px;
}
.btn-close {
color: #aaaaaa;
font-size: 30px;
text-decoration: none;
position: absolute;
right: 5px;
top: 0;
}
.btn-close:hover {
color: #919191;
}
.modal:before {
content: "";
display: none;
background: rgba(0, 0, 0, 0.6);
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
z-index: 10;
}
.modal:target:before {
display: block;
}
.modal:target .modal-dialog {
-webkit-transform: translate(0, 0);
-ms-transform: translate(0, 0);
transform: translate(0, 0);
top: 20%;
}
.modal-dialog {
background: #fefefe;
border: #333333 solid 1px;
border-radius: 5px;
margin-left: -200px;
position: fixed;
left: 50%;
top: -100%;
z-index: 11;
width: 360px;
-webkit-transform: translate(0, -500%);
-ms-transform: translate(0, -500%);
transform: translate(0, -500%);
-webkit-transition: -webkit-transform 0.3s ease-out;
-moz-transition: -moz-transform 0.3s ease-out;
-o-transition: -o-transform 0.3s ease-out;
transition: transform 0.3s ease-out;
}
.modal-body {
padding: 20px;
}
.modal-header,
.modal-footer {
padding: 10px 20px;
}
.modal-header {
border-bottom: #eeeeee solid 1px;
}
.modal-header h2 {
font-size: 20px;
}
.modal-footer {
border-top: #eeeeee solid 1px;
text-align: right;
}
<div class="wrap">
pop up!
</div>
<!-- Modal -->
<div class="modal" id="modal-one" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-header">
<h2>Modal in CSS?</h2>
×
</div>
<div class="modal-body">
<p>One modal example here! :D</p>
</div>
<div class="modal-footer">
Nice!
</div>
</div>
</div>
Jsfiddle
My problem is when i click pop up entire page scroll down to bottom and pop up appears
since i have lot of content in my page
i need to open pop up on same place i don't want the page to scroll down can some one help whats wrong
NOTE when you try with the above code you can only find scroll little bit
but in my page it scroll to bottom of page

Answer 1

I don't know if I understand it correctly but try to add sth like that:
body.unscrollable {
overflow:hidden;
}
and add class .unscrollable when modal is open.
It will disable scrolling on website body.