: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);
}

/* Container */
.cards .three-d-wrapper {
  perspective: 750px;
  isolation: isolate;
  transform: translate3d(0.1px, 0.1px, 0.1px);
    width: 330px; /* or any size you want */

}
.cards {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-evenly;
  position: relative;
  z-index: 1;
  width: 750px;
}
@media screen and (min-width: 600px) {
  .cards {
    flex-direction: row;
  }
}

/* Core card */
.card {
  width: clamp(200px, 18vw, 300px);
  height: clamp(280px, 25vw, 420px);
  position: relative;
  margin: 20px;
  border-radius: 5% / 3.5%;
  overflow: hidden;
  isolation: isolate;
  background-color: transparent;
  background-size: contain;
  background-repeat: no-repeat;
    background-position: center; /* centers it */

  box-shadow: 
    -5px -5px 5px -5px var(--color1), 
    5px 5px 5px -5px var(--color2), 
    0 55px 35px -20px rgba(0, 0, 0, 0.5);
  transition: transform 0.5s ease, box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: 
    -20px -20px 30px -25px var(--color1), 
    20px 20px 30px -25px var(--color2),
    0 55px 35px -20px rgba(0, 0, 0, 0.5);
}

/* Variants */
.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);
}

/* Effects */
.card:before,
.card:after {
  content: "";
  position: absolute;
  inset: 0;
  mix-blend-mode: screen;   /* softer */
  pointer-events: none;
}

.card:before {
  background-image: linear-gradient(
    115deg,
    transparent 0%,
    var(--color1) 25%,
    transparent 47%,
    transparent 53%,
    var(--color2) 75%,
    transparent 100%
  );
  background-size: 300% 300%;
  opacity: 0.2; /* toned down */
}

.card:after {
  background-image: url("https://assets.codepen.io/13471/sparkles.gif"), 
    url(https://assets.codepen.io/13471/holo.png), 
    linear-gradient(125deg, #ff008420 15%, #fca40020 30%, #ffff0015 40%, #00ff8a10 60%, #00cfff20 70%, #cc4cfa25 85%);
  background-size: 160%;
  opacity: 0.3; /* toned down */
}