<div class="card-12">
  <div class="card-12__image"><span class="card-12__icon">🎨</span></div>
  <div class="card-12__body">
    <h4 class="card-12__title">Slide Up</h4>
    <div class="card-12__hidden">
      Extra details slide up on hover.
      <span class="card-12__cta">Read more &rarr;</span>
    </div>
  </div>
</div>

/* Demo 12 has its own typography scale — don't include the shared rules. */
.card-12 {
  width: 100%;
  max-width: 280px;
  border-radius: 14px;
  overflow: hidden;
  background: #17171f;
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition:
    box-shadow 0.35s,
    transform 0.35s cubic-bezier(0.23, 1, 0.32, 1);
}
.card-12:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.42);
}
.card-12__image {
  height: 90px;
  background: linear-gradient(135deg, #1a1a2e, #0d0d2b);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}
.card-12:hover .card-12__image {
  transform: scale(1.05);
}
.card-12__body {
  padding: 16px 18px;
}
.card-12__title {
  font-size: 14px;
  font-weight: 600;
  color: #f0eeff;
  margin-bottom: 4px;
}
.card-12__hidden {
  font-size: 12px;
  color: #b8b6d4;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(8px);
  transition:
    max-height 0.4s ease,
    opacity 0.35s ease,
    transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}
.card-12:hover .card-12__hidden {
  max-height: 60px;
  opacity: 1;
  transform: translateY(0);
}
.card-12__cta {
  display: inline-block;
  margin-top: 6px;
  font-size: 12px;
  color: #7c6cff;
  font-weight: 600;
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity 0.3s 0.12s,
    transform 0.3s 0.12s;
}
.card-12:hover .card-12__cta {
  opacity: 1;
  transform: translateY(0);
}