.blocker {
        position: fixed;
        top: 0; 
        right: 0; 
        bottom: 0; 
        left: 0;
        width: 100%; 
        height: 100%;
        overflow: auto;
        z-index: 1000;
        padding: 20px;
        box-sizing: border-box;
        background-color: rgb(0,0,0);
        background-color: rgba(0,0,0,0.75);
        text-align: center;
}
.blocker:before{
        content: "";
        display: inline-block;
        height: 100%;
        vertical-align: middle;
        margin-right: -0.05em;
}
.blocker.behind {
        background-color: transparent;
}
.modal {
        display: none;
        vertical-align: middle;
        position: relative;
        z-index: 1001;
        max-width: 500px;
        box-sizing: border-box;
        width: 100%;
        background: #fff;
        padding: 30px;
        -webkit-box-shadow: 0 0 1px #000;
        -moz-box-shadow: 0 0 1px #000;
        -o-box-shadow: 0 0 1px #000;
        -ms-box-shadow: 0 0 1px #000;
        box-shadow: 0 0 1px #000;
        text-align: center;
}

.modal a.close-modal {
        position: absolute;
        top: 0;
        right: 0;
        display: block;
        width: 30px;
        height: 30px;
        text-indent: -9999px;
        background-size: contain;
        background-repeat: no-repeat;
        background-position: center center;
        background-image: url("../images/close.png");
}

.modal-spinner {
        display: none;
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translateY(-50%) translateX(-50%);
        padding: 12px 16px;
        border-radius: 5px;
        background-color: #111;
        height: 20px;
}

.modal-spinner > div {
        border-radius: 100px;
        background-color: #fff;
        height: 20px;
        width: 2px;
        margin: 0 1px;
        display: inline-block;

        -webkit-animation: sk-stretchdelay 1.2s infinite ease-in-out;
        animation: sk-stretchdelay 1.2s infinite ease-in-out;
}

.modal-spinner .rect2 {
        -webkit-animation-delay: -1.1s;
        animation-delay: -1.1s;
}

.modal-spinner .rect3 {
        -webkit-animation-delay: -1.0s;
        animation-delay: -1.0s;
}

.modal-spinner .rect4 {
        -webkit-animation-delay: -0.9s;
        animation-delay: -0.9s;
}

@-webkit-keyframes sk-stretchdelay {
  0%, 40%, 100% { -webkit-transform: scaleY(0.5) }
  20% { -webkit-transform: scaleY(1.0) }
}

@keyframes sk-stretchdelay {
  0%, 40%, 100% {
    transform: scaleY(0.5);
    -webkit-transform: scaleY(0.5);
  }  20% {
    transform: scaleY(1.0);
    -webkit-transform: scaleY(1.0);
  }
}