1 .overlay {

     2     background-color: gray;

     3     height: 100vh;

     4     left: 0;

     5     opacity: 0.77;

     6     position: fixed;

     7     right: 0;

     8     top: 0;

     9     z-index: 50;

    10 }

    11 

    12 .dialog {

    13     background: #fff none repeat scroll 0 0;

    14     border: 4px solid #ccc;

    15     border-radius: 10px;

    16     box-shadow: 0 0 10px #222;

    17     height: 300px;

    18     left: 50%;

    19     margin-left: -250px;

    20     margin-top: -150px;

    21     padding: 10px;

    22     position: fixed;

    23     top: 50%;

    24     width: 500px;

    25     z-index: 50;

    26 }

    27 

    28 .dialog h1{

    29   margin-top: 0;

    30 }