:root {
    --color1: rgb(0, 231, 255);
    --color2: rgb(255, 0, 231);
    --back: url(https://cdn2.bulbagarden.net/upload/1/17/Cardback.jpg);
    --charizard1: #fac;
    --charizard2: #ddccaa;
    --charizardfront: url(https://assets.codepen.io/13471/charizard-gx.webp);
    --pika1: #54a29e;
    --pika2: #a79d66;
    --pikafront: url(https://assets.codepen.io/13471/pikachu-gx.webp);
    --eevee1: #efb2fb;
    --eevee2: #acc6f8;
    --eeveefront: url(https://assets.codepen.io/13471/eevee-gx.webp);
    --mewtwo1: #efb2fb;
    --mewtwo2: #acc6f8;
    --mewtwofront: url(https://assets.codepen.io/13471/mewtwo-gx.webp);
  }
  
  
  
  .card {
  
    width: 71.5vw;
    height: 100vw;
    
    position: relative;
    overflow: hidden;
    margin: 20px;
    overflow: hidden;
    z-index: 10;
    touch-action: none;
    
    border-radius: 5% / 3.5%;
    box-shadow: 
      -5px -5px 5px -5px var(--color1), 
      5px 5px 5px -5px var(--color2), 
      -7px -7px 10px -5px transparent, 
      7px 7px 10px -5px transparent, 
      0 0 5px 0px rgba(255,255,255,0),
      0 55px 35px -20px rgba(0, 0, 0, 0.5);
    
    transition: transform 0.5s ease, box-shadow 0.2s ease;
    will-change: transform, filter;
    
    background-color: #040712;
    background-image: var(--front);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    transform-origin: center;
    
  }

  
  @media screen and (min-width: 600px) {
    .card {
      width: clamp(12.9vw, 61vh, 18vw);
      height: clamp(18vw, 85vh, 25.2vw);
    }
  }
  
  .card:hover {
    box-shadow: 
      -20px -20px 30px -25px var(--color1), 
      20px 20px 30px -25px var(--color2), 
      -7px -7px 10px -5px var(--color1), 
      7px 7px 10px -5px var(--color2), 
      0 0 13px 4px rgba(255,255,255,0.3),
      0 55px 35px -20px rgba(0, 0, 0, 0.5);
  }
  
  .card.charizard {
    --color1: var(--charizard1);
    --color2: var(--charizard2);
    --front: var(--charizardfront);
  }
  .card.pika {
    --color1: var(--pika1);
    --color2: var(--pika2);
    --front: var(--pikafront);
  }
  .card.mewtwo {
    --color1: var(--mewtwo1);
    --color2: var(--mewtwo2);
    --front: var(--mewtwofront);
  }
  .card.eevee {
    --color1: #ec9bb6;
    --color2: #ccac6f;
    --color3: #69e4a5;
    --color4: #8ec5d6;
    --color5: #b98cce;
    --front: var(--eeveefront);
  }
  
  .card:before,
  .card:after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    background-repeat: no-repeat;
    opacity: .5;
    mix-blend-mode: color-dodge;
    transition: all .33s ease;
  }
  
  .card:before {
    background-position: 50% 50%;
    background-size: 300% 300%;
    background-image: linear-gradient(
      115deg,
      transparent 0%,
      var(--color1) 25%,
      transparent 47%,
      transparent 53%,
      var(--color2) 75%,
      transparent 100%
    );
    opacity: .5;
    filter: brightness(.5) contrast(1);
    z-index: 1;
  }
  
  .card:after {
    opacity: 1;
    background-image: url("https://assets.codepen.io/13471/sparkles.gif"), 
      url(https://assets.codepen.io/13471/holo.png), 
      linear-gradient(125deg, #ff008450 15%, #fca40040 30%, #ffff0030 40%, #00ff8a20 60%, #00cfff40 70%, #cc4cfa50 85%);
    background-position: 50% 50%;
    background-size: 160%;
    background-blend-mode: overlay;
    z-index: 2;
    filter: brightness(1) contrast(1);
    transition: all .33s ease;
    mix-blend-mode: color-dodge;
    opacity: .75;
  }
  
  .card.active:after,
  .card:hover:after {
    filter: brightness(1) contrast(1);;
    opacity: 1;
  }
  
  .card.active,
  .card:hover {
    animation: none;
    transition: box-shadow 0.1s ease-out;
  }
  
  .card.active:before,
  .card:hover:before {
    animation: none;
    background-image: linear-gradient(
      110deg,
      transparent 25%,
      var(--color1) 48%,
      var(--color2) 52%,
      transparent 75%
    );
    background-position: 50% 50%;
    background-size: 250% 250%;
    opacity: .88;
    filter: brightness(.66) contrast(1.33);
    transition: none;
  }
  
  .card.active:before,
  .card:hover:before,
  .card.active:after,
  .card:hover:after {
    animation: none;
    transition: none;
  }
  
  .card.animated {
    transition: none;
    animation: holoCard 12s ease 0s 1;
  }
  
  .card.animated ::before {
    transition: none;
    animation: holoGradient 12s ease 0s 1;
  }
  
  .card.animated ::after {
    transition: none;
    animation: holoSparkle 12s ease 0s 1;
  }
  
  
  
  @keyframes holoSparkle {
    0%, 100% {
      opacity: .75; background-position: 50% 50%; filter: brightness(1.2) contrast(1.25);
    }
    5%, 8% {
      opacity: 1; background-position: 40% 40%; filter: brightness(.8) contrast(1.2);
    }
    13%, 16% {
      opacity: .5; background-position: 50% 50%; filter: brightness(1.2) contrast(.8);
    }
    35%, 38% {
      opacity: 1; background-position: 60% 60%; filter: brightness(1) contrast(1);
    }
    55% {
      opacity: .33; background-position: 45% 45%; filter: brightness(1.2) contrast(1.25);
    }
  }
  
  @keyframes holoGradient {
    0%, 100% {
      opacity: 0.5;
      background-position: 50% 50%;
      filter: brightness(.5) contrast(1);
    }
    5%, 9% {
      background-position: 100% 100%;
      opacity: 1;
      filter: brightness(.75) contrast(1.25);
    }
    13%, 17% {
      background-position: 0% 0%;
      opacity: .88;
    }
    35%, 39% {
      background-position: 100% 100%;
      opacity: 1;
      filter: brightness(.5) contrast(1);
    }
    55% {
      background-position: 0% 0%;
      opacity: 1;
      filter: brightness(.75) contrast(1.25);
    }
  }
  
  @keyframes holoCard {
    0%, 100% {
      transform: rotateZ(0deg) rotateX(0deg) rotateY(0deg);
    }
    5%, 8% {
      transform: rotateZ(0deg) rotateX(6deg) rotateY(-20deg);
    }
    13%, 16% {
      transform: rotateZ(0deg) rotateX(-9deg) rotateY(32deg);
    }
    35%, 38% {
      transform: rotateZ(3deg) rotateX(12deg) rotateY(20deg);
    }
    55% {
      transform: rotateZ(-3deg) rotateX(-12deg) rotateY(-27deg);
    }
  }
  
  
  
  .card.eevee:hover {
    box-shadow: 
      0 0 30px -5px white,
      0 0 10px -2px white,
      0 55px 35px -20px rgba(0, 0, 0, 0.5);
  }
  .card.eevee:hover:before,
  .card.eevee.active:before {
    background-image: linear-gradient(
      115deg,
      transparent 20%,
      var(--color1) 36%,
      var(--color2) 43%,
      var(--color3) 50%,
      var(--color4) 57%,
      var(--color5) 64%,
      transparent 80%
    );
  }
  
  
  
  
  .demo .card {
    background-image: var(--back);
    font-size: 2vh
  }
  .demo .card > span {
    position: relative;
    top: 45%;
  }
  
  .demo .card:nth-of-type(1),
  .demo .card:nth-of-type(2),
  .demo .card:nth-of-type(3) {
    width: 20vh;
    height: 27.5vh;
    box-shadow: inset 0 0 0 1px rgba(white,0.4), 0 25px 15px -10px rgba(0, 0, 0, 0.5);
    animation: none;
  }
  
  .demo .card:nth-of-type(1)::after,
  .demo .card:nth-of-type(1)::before,
  .demo .card:nth-of-type(2)::after,
  .demo .card:nth-of-type(2)::before,
  .demo .card:nth-of-type(3)::after, 
  .demo .card:nth-of-type(3)::before{
      animation: none;
    } 

  .demo .card:nth-of-type(1)::after, .demo .card:nth-of-type(1)::before{
    display: none;
  }
  .demo .card:nth-of-type(2) {
    background: none;
  }
  
  .demo .card:nth-of-type(2) ::before {
    display: none;
  }

  .demo .card:nth-of-type(3) {
    background: none;
  }

  .demo .card:nth-of-type(3) ::after {
    display: none;
  }
  
  .operator {
    display: inline-block;
    vertical-align: middle;
    font-size: 6vh;
  }

  #app {
    position: relative;
    z-index: 100;
  }
  
  .demo,
  .cards { 
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-evenly;
    perspective: 2000px;
    position: relative;
    z-index: 1;
    transform: translate3d(0.1px, 0.1px, 0.1px )
  }
  .demo {
    flex-direction: row;
    justify-content: center;
  }
  
  @media screen and (min-width: 600px) {
    .cards {
      flex-direction: row;
    }
  }

  .cards .card:nth-child(2) {
    animation-delay: 0.25s;
  }
  
  .cards .card:nth-child(2)::before {
    animation-delay: 0.25s;
  }
  
  .cards .card:nth-child(2)::after {
    animation-delay: 0.25s;
  }

  .cards .card:nth-child(3) {
    animation-delay: 0.5s;
  }
  
  .cards .card:nth-child(3)::before {
    animation-delay: 0.5s;
  }
  
  .cards .card:nth-child(3)::after {
    animation-delay: 0.5s;
  }

  .cards .card:nth-child(4) {
    animation-delay: 0.75s;
  }
  
  .cards .card:nth-child(4)::before {
    animation-delay: 0.75s;
  }
  
  .cards .card:nth-child(4)::after {
    animation-delay: 0.75s;
  }