html, body {
    height: 100%;
    overflow: auto;
}

.avgrund-popin {
    position: absolute;
    background: #fff;
    padding: 10px;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    filter: alpha(opacity=0);
    top: 50%;
    left: 50%;
    z-index: 1000;
    box-shadow: 0 1px 10px 0 rgba(0, 0, 0, .5);

    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    -ms-transform: scale(0.8);
    -o-transform: scale(0.8);
    transform: scale(0.8);
}

.avgrund-overlay {
    background: #000;
    width: 100%;
    position: relative;
    top: -1500px;
    left: 0;
    z-index: 101;
    visibility: hidden;
    opacity: 0;
    filter: alpha(opacity=0);
}

body.avgrund-ready,
.avgrund-ready .avgrund-popin,
.avgrund-ready .avgrund-overlay {
    -webkit-transform-origin: 50% 50%;
    -moz-transform-origin: 50% 50%;
    -ms-transform-origin: 50% 50%;
    -o-transform-origin: 50% 50%;
    transform-origin: 50% 50%;

    -webkit-transition: 0.3s all ease-out;
    -moz-transition: 0.3s all ease-out;
    -ms-transition: 0.3s all ease-out;
    -o-transition: 0.3s all ease-out;
    transition: 0.3s all ease-out;
}

body.avgrund-active {
    -webkit-transform: scale(0.9);
    -moz-transform: scale(0.9);
    -ms-transform: scale(0.9);
    -o-transform: scale(0.9);
    transform: scale(0.9);
    overflow: hidden;
}

.avgrund-active .avgrund-popin {
    visibility: visible;
    opacity: 1;
    filter: alpha(opacity=100);

    -webkit-transform: scale(1.1);
    -moz-transform: scale(1.1);
    -ms-transform: scale(1.1);
    -o-transform: scale(1.1);
    transform: scale(1.1);
}

.avgrund-active .avgrund-overlay {
    visibility: visible;
    opacity: .5;
    filter: alpha(opacity=50);
    height: 20000px;
}

.avgrund-popin.stack {
    -webkit-transform: scale(1.5);
    -moz-transform: scale(1.5);
    -ms-transform: scale(1.5);
    -o-transform: scale(1.5);
    transform: scale(1.5);
}

.avgrund-active .avgrund-popin.stack {
    -webkit-transform: scale(1.1);
    -moz-transform: scale(1.1);
    -ms-transform: scale(1.1);
    -o-transform: scale(1.1);
    transform: scale(1.1);
}

.avgrund-active .avgrund-blur {
    -webkit-filter: blur(1px);
    -moz-filter: blur(1px);
    -ms-filter: blur(1px);
    -o-filter: blur(1px);
    filter: blur(1px);
}

/* Optional close button styles */
.avgrund-close {
    display: block;
    color: #555;
    font-size: 13px;
    text-decoration: none;
    text-transform: uppercase;
    position: absolute;
    top: 6px;
    right: 10px;
}