.dialog-hidden {
    display: none;
}

.dialog-visible {
}

.dialog-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 200%;
    background-color: black;
    opacity: .9;
    z-index: 100;
}

.dialog-container {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
        -webkit-transform: translate(-50%, -50%);
        -moz-transform: translate(-50%, -50%);
        -o-transform: translate(-50%, -50%);
        -ms-transform: translate(-50%, -50%);
    width: 50%;
    min-width: 300px;
    max-width: 800px;
    min-height: 5%;
    max-height: 100%;
    background-color: #333;
    color: white;
    text-align: center;
    padding: 45px 15px 45px 15px;
    overflow-y: auto;
    z-index: 150;
}

.dialog-container-visible {
    animation: dialog-in linear .2s;
}

/* ANIMATION */

@keyframes dialog-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
}

@-webkit-keyframes dialog-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
}

@-moz-keyframes dialog-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
}

@-o-keyframes dialog-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
}