@import '../../assets/scss/variables';

.split-flap {
  margin: 1vw;
  width: 40px;
  height: 40px;
  line-height: 40px;
  font-size: 40px;
  text-align: center;
  font-family: monospace;
  perspective: 100px;
  color: white;

  .top-next {
    height: 50%;
    width: 100%;
    background-color: $colLightBlue;
    overflow: hidden;
    z-index: 0;
    position: relative;
    border-radius: 5px 5px 0 0;
  }

  .top-current {
    margin-top: -50%;
    height: 50%;
    width: 100%;
    background-color: $colLightBlue;
    overflow: hidden;
    z-index: 1;
    position: relative;
    border-radius: 5px 5px 0 0;
    transform-origin: bottom;
    transform: rotateX(0deg);

    &--animate {
      animation: flipUp ease-in 1;
      animation-duration: 2s;
      animation-fill-mode: forwards;
    }

    &--stop {
      animation: none;
    }
  }

  .bottom-current {
    height: 50%;
    width: 100%;
    background-image: linear-gradient(180deg, $colLightBlue, $colDarkBlue);
    overflow: hidden;
    z-index: 1;
    position: relative;
    border-radius: 0 0 5px 5px;

    span {
      transform: translateY(-50%);
      display: block;
    }
  }

  .bottom-next {
    margin-top: -50%;
    height: 50%;
    width: 100%;
    background-image: linear-gradient(180deg, $colLightBlue, $colDarkBlue);
    overflow: hidden;
    z-index: 1;
    position: relative;
    border-radius: 0 0 5px 5px;
    transform-origin: top;
    transform: rotateX(90deg);

    span {
      transform: translateY(-50%);
      display: block;
    }

    &--animate {
      animation: flipDown ease-out 1;
      animation-duration: 2s;
      animation-fill-mode: forwards;
    }

    &--stop {
      animation: none;
    }
  }

  @keyframes flipDown {
    0% {
      transform: rotateX(90deg);
    }
    50% {
      transform: rotateX(90deg);
    }
    100% {
      transform: rotateX(0deg);
    }
  }

  @keyframes flipUp {
    0% {
      transform: rotateX(0deg);
    }
    50% {
      transform: rotateX(-90deg);
    }
    100% {
      transform: rotateX(-90deg);
    }
  }
}

.container {
  display: flex;
  justify-content: center;
  background-color: #111111;
  border: solid 5px black;
}