.progressive {
    position: relative;
    display: block;
    overflow: hidden;
    outline: none;
}
.progressive img {
    display: block;
    width: 100%;
    max-width: none;
    height: auto;
    border: 0;
}
.progressive img.preview {
    filter: blur(2vw);
    transform: scale(1.05);
}
.progressive img.reveal {
    position: absolute;
    left: 0;
    top: 0;
    will-change: transform, opacity;
    animation: progressiveReveal 1s ease-out;
}
@keyframes progressiveReveal {
    0% {
        transform: scale(1.05);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}