body {
  font-family: "Overpass Mono", monospace;
  font-weight: 400;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  background-image: linear-gradient(to right top, #d16ba5, #c777b9, #ba83ca, #aa8fd8, #9a9ae1, #8aa7ec, #79b3f4, #69bff8, #52cffe, #41dfff, #46eefa, #5ffbf1);
}

.card {
  width: 320px;
  height: 200px;
  border-radius: 10px;
  perspective: 1000px;
}
.card:hover .card-inner {
  transform: rotateY(180deg);
}
.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  transition: transform 600ms ease;
  transform-style: preserve-3d;
  box-shadow: 0 0 25px 2px rgba(0, 0, 0, 0.2);
}
.card-front, .card-back {
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  overflow: hidden;
  backface-visibility: hidden;
  background: linear-gradient(321.03deg, #01adef 0%, #0860bf 91.45%);
}
.card-front {
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  transition: transform 300ms ease-in-out;
}
.card-back {
  transform: rotateY(180deg);
}
.card-back::before {
  content: "";
  position: absolute;
  top: 40%;
  left: 20%;
  width: 180%;
  height: 120%;
  border-radius: 100%;
  background-image: linear-gradient(to right top, #a3d4e7, #a7d5e6, #abd5e4, #aed6e3, #b2d6e2, #aed4e2, #abd3e1, #a7d1e1, #9bcee1, #8ecae1, #81c7e1, #73c3e1);
  filter: blur(10px);
  opacity: 0.15;
}
.card-back::after {
  content: "";
  position: absolute;
  top: 15%;
  width: 100%;
  height: 40px;
  background-image: linear-gradient(to right top, #021318, #07191f, #0a1f26, #0b262e, #0c2c35, #0c2c35, #0c2c35, #0c2c35, #0b262e, #0a1f26, #07191f, #021318);
}
.card-bg {
  position: absolute;
  top: -20px;
  right: -120px;
  width: 380px;
  height: 250px;
  background: linear-gradient(321.03deg, #01adef 0%, #0860bf 91.45%);
  border-top-left-radius: 100%;
}
.card-bg::before {
  content: "";
  position: absolute;
  top: -20px;
  right: -80px;
  width: 380px;
  height: 250px;
  background: linear-gradient(321.03deg, #01adef 0%, #0860bf 91.45%);
  border-top-left-radius: 100%;
}
.card-bg::after {
  content: "";
  position: absolute;
  top: -20px;
  right: -120px;
  width: 380px;
  height: 250px;
  background: linear-gradient(321.03deg, #01adef 0%, #0860bf 91.45%);
  border-top-left-radius: 100%;
}
.card-glow {
  position: absolute;
  top: -140px;
  left: -65px;
  height: 200px;
  width: 400px;
  background: rgba(0, 183, 255, 0.4);
  filter: blur(10px);
  border-radius: 100%;
  transform: skew(-15deg, -15deg);
}
.card-contactless {
  position: absolute;
  right: 15px;
  top: 55px;
  transform: scale(0.5);
}
.card-chip {
  position: absolute;
  top: 65px;
  left: 25px;
  width: 45px;
  height: 34px;
  border-radius: 5px;
  background-color: #ffda7b;
  overflow: hidden;
}
.card-chip::before {
  content: "";
  position: absolute;
  left: 49%;
  top: -7%;
  transform: translateX(-50%);
  background: #ffda7b;
  border: 1px solid #a27c1f;
  width: 25%;
  height: 110%;
  border-radius: 100%;
  z-index: 2;
}
.card-chip::after {
  content: "";
  position: absolute;
  top: 30%;
  left: -10%;
  background: transparent;
  border: 1px solid #a27c1f;
  width: 120%;
  height: 33%;
}
.card-holder {
  position: absolute;
  left: 25px;
  bottom: 30px;
  color: white;
  font-size: 12px;
  letter-spacing: 0.2em;
  filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.3));
}
.card-number {
  position: absolute;
  left: 25px;
  bottom: 65px;
  color: white;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.2em;
  filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.3));
}
.card-valid {
  position: absolute;
  right: 25px;
  bottom: 30px;
  color: white;
  font-size: 11px;
  letter-spacing: 0.2em;
  filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.3));
}
.card-valid::before {
  content: "GOOD THRU";
  position: absolute;
  top: 1px;
  left: -35px;
  width: 50px;
  font-size: 7px;
}
.card-signature {
  position: absolute;
  top: 120px;
  left: 15px;
  width: 40%;
  height: 30px;
  background: #eeecec;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #021318;
  font-family: "Mr Dafoe", cursive;
  font-size: 12px;
  font-weight: 400;
}
.card-signature::before {
  content: "Authorized Signature";
  position: absolute;
  top: -15px;
  left: 0;
  font-family: "Overpass Mono", monospace;
  font-size: 9px;
  color: #eeecec;
}
.card-seccode {
  position: absolute;
  top: 125px;
  left: 245px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 17px;
  color: #021318;
  background-color: #eeecec;
  text-align: center;
  font-size: 11px;
}

.logo {
  position: absolute;
  right: 25px;
  top: 30px;
}

.hint {
  padding: 2em 0;
  font-family: "Noto Sans KR", sans-serif;
  letter-spacing: 0.025em;
  font-weight: 400;
  color: #a3d4e7;
}