.modal {
    display: none;
    vertical-align: middle;
    position: relative;
    z-index: 2;
    max-width: 500px;
    box-sizing: border-box;
    width: 90%;
    background: #fff;
    padding: 15px 30px;
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
    -o-border-radius: 8px;
    -ms-border-radius: 8px;
    border-radius: 8px;
    -webkit-box-shadow: 0 0 10px #000;
    -moz-box-shadow: 0 0 10px #000;
    -o-box-shadow: 0 0 10px #000;
    -ms-box-shadow: 0 0 10px #000;
    box-shadow: 0 0 10px #000;
    text-align: left;
}


.blocker {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    z-index: 1;
    padding: 20px;
    box-sizing: border-box;
    background-color: rgba(112,112,112,0.77);
    text-align: center;
}

.blocker:before {
    content: "";
    display: inline-block;
    height: 100%;
    vertical-align: middle;
    margin-right: -0.05em;
}