*{
    Margin:0;
    Padding:0;
    Box-sizing: border-box;
}

html,body{
    Width:100%;
    Height:100%;
}
.transition{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    pointer-events: none;
    z-index: 99;
}

.transition-row{
    flex: 1;
    display: flex;
}

.transition-row.row-1 .block{
    transform-origin: top;
}

.transition-row.row-2 .block{
    transform-origin: bottom;
}

.block{
    flex: 1;
    /* background-color: #fd552f; */
    background: #0c0c0c;
    transform: scaleY(1);
    will-change: transform;
}