CSS popup - safari issues - html

Question

ive got a CSS popup box on my website targeted through an achor tag, it work perfectly fine in chrome and firefox but it wont open in safari, i think its something to do with the visibilty:hidden? any help would be great thanks heres a sample of the code :
<a href="#popup1" class="button">
</a>
<div id="popup1" class="overlay">
<div class="popup">
<h2>Main Stage</h2>
<a class="close" href="#">×</a>
<div class="content">content here</div>
</div>
</div>
CSS:
.button {
font-size: 1em;
padding: 10px;
color: #fff;
border: 2px solid #06D85F;
border-radius: 20px/50px;
text-decoration: none;
cursor: pointer;
transition: all 0.3s ease-out;
}
.button:hover {
background: #06D85F;
}
.overlay {
position: fixed;
top: 0;
bottom: 0;
left: 0;
right: 0;
background: rgba(0, 0, 0, 0.7);
transition: opacity 500ms;
visibility: hidden;
opacity: 0;
}
.overlay:target {
visibility: visible;
opacity: 1;
}
.popup {
margin: 70px auto;
padding: 20px;
background: $blue;
width: 50%;
position: relative;
transition: all 1s ease-in-out;
}

Answer 1

Try this model
Only HTML CSS
$("#open").on('click',function (){
$('#model').fadeIn(800);
});
$("#closebtn").on('click',function (){
$('#model').fadeOut(800);
});
#model{
background : rgba(0,0,0,0.7);
position: fixed;
left: 0;
top: 0;
width: 100%;
height: 100%;
z-index: 100;
display: none;
}
#modelmain{
background: #fff;
width: 30%;
position: relative;
top: 20%;
left: calc(50% - 15%);
padding: 15px;
border-right: 4px;
border-radius: 5px;
}
#closebtn{
background-color: red;
color: white;
width: 30px;
height: 30px;
line-height: 30px;
text-align: center;
border-radius: 50%;
position: absolute;
top: -15px;
right: -15px;
cursor: pointer;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button id="open">Open model</button>
<div id="model">
<div id="modelmain">
<h2>Your Contain</h2>
<div id="closebtn">X</div>
</div>
</div>