.flashcards {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-4) 0;
}

.flashcard {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 3 / 2;
  perspective: 1400px;
  cursor: pointer;
}

.flashcard__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform var(--dur-med) var(--ease-out-expo);
}

.flashcard[aria-pressed="true"] .flashcard__inner {
  transform: rotateY(180deg);
}

.flashcard__face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-8);
  text-align: center;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  line-height: var(--lh-heading);
}

.flashcard__face--front {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-strong);
}

.flashcard__face--back {
  transform: rotateY(180deg);
  background: var(--accent-soft);
  border-color: color-mix(in oklch, var(--accent) 30%, var(--border));
  font-family: var(--font-body);
  font-size: var(--text-md);
  font-weight: 400;
  color: var(--text-strong);
  line-height: var(--lh-ui);
}

.flashcards__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.flashcards__pos {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-muted);
  min-width: 5ch;
  text-align: center;
}

.flashcards__btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 20px;
  line-height: 1;
  transition: background var(--dur-fast) var(--ease-out-expo),
              color var(--dur-fast) var(--ease-out-expo),
              border-color var(--dur-fast) var(--ease-out-expo);
}
@media (hover: hover) and (pointer: fine) {
  .flashcards__btn:hover:not(:disabled) {
    background: var(--bg-soft);
    color: var(--text-strong);
    border-color: var(--text-muted);
  }
}
.flashcards__btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.flashcards__hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .flashcard__inner { transition: none; }
}