.progressive {
    display: block;
    outline: none;
    overflow: hidden;
    position: relative
}

.progressive img {
    border: 0;
    display: block;
    height: auto;
    max-width: none;
}

.progressive img.preview {
    filter: blur(2px);
}

.progressive img.reveal {
    animation: progressiveReveal 100ms linear;
    left: 0;
    position: absolute;
    top: 0
}

@keyframes progressiveReveal {
    0% {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}