split-flap-display/xsplit-flap.css at master · ryddle/split-flap-display · GitHub

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:root {
    --flapWidth: 40px;
    --flapTextColor: #FFEB3B;
}

.splitflap {
    position: relative;
    min-width: var(--flapWidth);
    height: calc(var(--flapWidth) * 1.5);
    line-height: calc(var(--flapWidth) * 1.5 + var(--flapWidth)*0.1);
    margin: 2px;
    font-size: var(--flapWidth);
    font-family: monospace;
    text-align: center;
    color: var(--flapTextColor, #FFEB3B);
}

.top {
    position: relative;
    height: 50%;
    width: 100%;
    background-color: #000000;
    /*border-radius: 10px 10px 0 0;*/
    border-top-left-radius: calc(var(--flapWidth)/5);
    border-top-right-radius: calc(var(--flapWidth)/5);
    border-bottom-left-radius: 0px;
    border-bottom-right-radius: 0px;
    border-bottom: 1px solid black;
    overflow: hidden;
    z-index: 0;
}

.bottom {
    position: relative;
    height: 100%;
    width: 100%;
    margin-top: -75%;
    /* border-radius: 10px 10px 10px 10px; */
    border-top-left-radius: calc(var(--flapWidth)/5);
    border-top-right-radius: calc(var(--flapWidth)/5);
    border-bottom-left-radius: calc(var(--flapWidth)/5);
    border-bottom-right-radius: calc(var(--flapWidth)/5);
    z-index: -1;
    background-color: black;
    background-image: linear-gradient(rgba(0, 0, 0, 0), #000000);
    transform-origin: center;
}

.bottom:after {
    content: "";
    background-image: -webkit-linear-gradient(0deg, white 7%, black 7%, black 93%, white 93%, white 100%);
    display: block;
    height: 1px;
    width: 100%;
    position: absolute;
    top: 50%;
}

.nextHalf {
    position: relative;
    height: 50%;
    width: 100%;
    margin-top: -150%;
    overflow: hidden;
    /* border-radius: 10px 10px 0 0; */
    border-top-left-radius: calc(var(--flapWidth)/5);
    border-top-right-radius: calc(var(--flapWidth)/5);
    border-bottom-left-radius: 0px;
    border-bottom-right-radius: 0px;
    z-index: 2;
    background-color: black;
    background-image: linear-gradient(#000000, rgba(0, 0, 0, 0));
    transform-origin: bottom;
}

.nextHalf:after {
    content: "";
    background-image: -webkit-linear-gradient(0deg, white 7%, black 7%, black 93%, white 93%, white 100%);
    display: block;
    height: 2px;
    width: 100%;
    position: absolute;
    bottom: 0;
}

.nextFull {
    position: relative;
    height: 100%;
    width: 100%;
    background-color: #000000;
    margin-top: -150%;
    /* border-radius: 10px 10px 10px 10px; */
    border-top-left-radius: calc(var(--flapWidth)/5);
    border-top-right-radius: calc(var(--flapWidth)/5);
    border-bottom-left-radius: calc(var(--flapWidth)/5);
    border-bottom-right-radius: calc(var(--flapWidth)/5);
    z-index: -3;
}


.flip1 {
    animation: flip1 ease-in 1;
    animation-duration: 1s;
}

.flip2 {
    animation: flip2 ease-out 1;
    animation-duration: 1s;
}

@keyframes flip1 {
    0% {
        transform: rotateX(0deg);
        background-color: #000000;
    }

    50% {
        transform: rotateX(90deg);
        background-color: black;
    }

    100% {
        transform: rotateX(90deg);
    }
}

@keyframes flip2 {
    0% {
        transform: rotateX(-90deg);
    }

    50% {
        transform: rotateX(-90deg);
    }

    100% {
        transform: rotateX(0deg);
        background-color: #000000;
    }
}