html, body, .container, .input, .output {
    margin: 0;
    padding: 0;
    border: 0;
    font-family: Verdana, Arial, sans-serif;
    width: 100%;
    height: 100%;
}

.container {
    position: relative;
}

.input, .output {
    position: absolute;
    width: 50%;
    top: 0;
}

.input {
    left: 0;
    background-color: #ffec70;
}

.output {
    right: 0;
}

.drop-here {
    display: none;
    top: 50%;
    left: 50%;
    float: left;
    position: relative;
    transform: translate(-50%, -50%);
}

.model {
    display: none;
    height: 100%;
    width: 100%;
    overflow: scroll;
}

.model.ready {
    display: block;
}

.targeted .model {
    display: none;
}

.targeted .drop-here {
    display: block;
}