Flip Card

<div class="flip-card">
  <div class="flip-card-inner">
    <div class="flip-card-front">
      <h3 style="margin: 0 0 8px 0;">Front Side</h3>
      <p style="margin: 0;">Hover to flip</p>
    </div>
    <div class="flip-card-back">
      <h3 style="margin: 0 0 8px 0;">Back Side</h3>
      <p style="margin: 0;">Hidden content revealed!</p>
    </div>
  </div>
</div>

.flip-card {
  width: 280px;
  height: 200px;
  perspective: 1000px;
  cursor: pointer;
}
.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}
.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}
.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.flip-card-front {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}
.flip-card-back {
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
  color: white;
  transform: rotateY(180deg);
}