body {
  background-color: #1c1b2f;
  color: #ffd700;
  font-family: 'Georgia', serif;
  text-align: center;
  margin: 0;
  padding: 0;
}
h1 {
  font-size: 2em;
  margin: 20px 0;
  text-shadow: 2px 2px 5px #000;
}
.card-container {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 20px;
  flex-wrap: wrap;
}
.card {
  width: 2.7in;
  height: 4.7in;
  perspective: 1000px;
  cursor: pointer;
}
.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.8s;
}
.card.flipped .card-inner {
  transform: rotateY(180deg);
}
.card-front, .card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}
.card-back {
  background-image: url('images/card-back.jpg');
  background-size: cover;
  background-position: center;
}
.card-front {
  transform: rotateY(180deg);
  background-size: cover;
  background-position: center;
}
.button-container {
  margin: 20px;
}