[SOLUCIONADO] Popup html5

[Sarami]

Hola buenas tardes,

Estoy trabajando en HTML5 en vsnomad esto con el fin de pasarlo a una aplicación android.

Mi problema es que el popup al correr la aplicación no funciona mucho menos en la tablet aqui les dejo mi código para que me puedan entender mejor.

HTML

<a href="#x" class="overlay" id="join_form"></a>
<div class="popup">
<h2>Referencias</h2>
<a class="close" href="#close"></a>

</div>
</div>

CSS

.main {
width: 800px;
height: 600px;
margin: 50px auto;
}
.panel {
background-color: #444;
height: 34px;
padding: 10px;
}
.panel a#login_pop, .panel a#join_pop {
border: 2px solid #aaa;
color: #fff;
display: block;
float: right;
margin-right: 10px;
padding: 5px 10px;
text-decoration: none;
text-shadow: 1px 1px #000;

-webkit-border-radius: 10px;
-moz-border-radius: 10px;
-ms-border-radius: 10px;
-o-border-radius: 10px;
border-radius: 10px;
}
a#login_pop:hover, a#join_pop:hover {
border-color: #eee;
}
.overlay {
background-color: rgba(0, 0, 0, 0.6);
bottom: 0;
cursor: default;
left: 0;
opacity: 0;
position: fixed;
right: 0;
top: 0;
visibility: hidden;
z-index: 1;

-webkit-transition: opacity .5s;
-moz-transition: opacity .5s;
-ms-transition: opacity .5s;
-o-transition: opacity .5s;
transition: opacity .5s;
}
.overlay:target {
visibility: visible;
opacity: 1;
}
.popup {
background-color: #fff;
border: 3px solid #fff;
display: inline-block;
left: 50%;
opacity: 0;
padding: 15px;
position: fixed;
text-align: justify;
top: 40%;
visibility: hidden;
z-index: 10;

-webkit-transform: translate(-50%, -50%);
-moz-transform: translate(-50%, -50%);
-ms-transform: translate(-50%, -50%);
-o-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);

-webkit-border-radius: 10px;
-moz-border-radius: 10px;
-ms-border-radius: 10px;
-o-border-radius: 10px;
border-radius: 10px;

-webkit-box-shadow: 0 1px 1px 2px rgba(0, 0, 0, 0.4) inset;
-moz-box-shadow: 0 1px 1px 2px rgba(0, 0, 0, 0.4) inset;
-ms-box-shadow: 0 1px 1px 2px rgba(0, 0, 0, 0.4) inset;
-o-box-shadow: 0 1px 1px 2px rgba(0, 0, 0, 0.4) inset;
box-shadow: 0 1px 1px 2px rgba(0, 0, 0, 0.4) inset;

-webkit-transition: opacity .5s, top .5s;
-moz-transition: opacity .5s, top .5s;
-ms-transition: opacity .5s, top .5s;
-o-transition: opacity .5s, top .5s;
transition: opacity .5s, top .5s;
}
.overlay:target+.popup {
top: 50%;
opacity: 1;
visibility: visible;
}
.close {
background-color: rgba(0, 0, 0, 0.8);
height: 30px;
line-height: 30px;
position: absolute;
right: 0;
text-align: center;
text-decoration: none;
top: -15px;
width: 30px;

-webkit-border-radius: 15px;
-moz-border-radius: 15px;
-ms-border-radius: 15px;
-o-border-radius: 15px;
border-radius: 15px;
}
.close:before {
color: rgba(255, 255, 255, 0.9);
content: "X";
font-size: 24px;
text-shadow: 0 -1px rgba(0, 0, 0, 0.9);
}
.close:hover {
background-color: rgba(64, 128, 128, 0.8);
}
.popup p, .popup div {
margin-bottom: 10px;
}
.popup label {
display: inline-block;
text-align: left;
width: 120px;
}
.popup input[type="text"], .popup input[type="password"] {
border: 1px solid;
border-color: #999 #ccc #ccc;
margin: 0;
padding: 2px;

-webkit-border-radius: 2px;
-moz-border-radius: 2px;
-ms-border-radius: 2px;
-o-border-radius: 2px;
border-radius: 2px;
}
.popup input[type="text"]:hover, .popup input[type="password"]:hover {
border-color: #555 #888 #888;
}