/* ── Flip cards ──────────────────────────────────────────────── */
.flip-card {
  perspective: 1000px;
  height: 220px;
  cursor: pointer;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 0.5rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.flip-card-front {
  color: #fff;
  font-weight: 600;
}

.flip-card-front p {
  font-weight: 400;
  font-size: 0.85rem;
  opacity: 0.85;
  margin-bottom: 0;
}

.flip-card-back {
  transform: rotateY(180deg);
  color: #fff;
  font-size: 0.9rem;
}

.flip-card-back p {
  margin-bottom: 0.3rem;
}

.flip-card-adelie .flip-card-front,
.flip-card-adelie .flip-card-back {
  background: darkorange;
}

.flip-card-chinstrap .flip-card-front,
.flip-card-chinstrap .flip-card-back {
  background: #7b2d8e;
}

.flip-card-gentoo .flip-card-front,
.flip-card-gentoo .flip-card-back {
  background: #2a7b7f;
}

/* ── Card slider ─────────────────────────────────────────────── */
.slider-wrapper {
  position: relative;
}

.slider-track {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  padding: 0.5rem 0 1rem;
}

/* hide scrollbar across browsers */
.slider-track::-webkit-scrollbar {
  display: none;
}
.slider-track {
  scrollbar-width: none;
}

.slider-card {
  flex: 0 0 280px;
  scroll-snap-align: start;
  border: 1px solid #dee2e6;
  border-radius: 0.5rem;
  padding: 1.25rem 1.5rem;
  background: #f8f9fa;
}

.slider-card h4 {
  margin-top: 0;
  font-size: 1rem;
  color: #213D4F;
}

.slider-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid #dee2e6;
  background: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  z-index: 1;
}

.slider-btn:hover {
  background: #f0f0f0;
}

.slider-btn-prev {
  left: -18px;
}

.slider-btn-next {
  right: -18px;
}

/* ── Progressive reveal (Continue buttons) ─────────────────── */
.gated {
  display: none;
}

.gated.unlocked {
  display: block;
  animation: gatedReveal 0.6s ease;
}

@keyframes gatedReveal {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.continue-btn {
  display: block;
  margin: 2rem auto;
  padding: 0.6rem 2rem;
  font-size: 1rem;
  font-weight: 500;
  color: #fff;
  background: #213D4F;
  border: none;
  border-radius: 2rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.continue-btn:hover {
  background: #2d5468;
}