/* Flashcards section. Builds on the quiz styles (quiz-app, quiz-header, quiz-controls, ...). */

.flashcard {
  margin-bottom: 16px;
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  perspective: 1400px;
  -webkit-tap-highlight-color: transparent;
}

.flashcard:focus-visible {
  outline: 2px solid #6495ed;
  outline-offset: 2px;
}

/* Both faces share one grid cell, so the card is as tall as the taller face. */
.flashcard-inner {
  display: grid;
  min-height: 240px;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
}

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

.flashcard-inner.enter {
  animation: flashcard-enter 0.25s ease-out;
}

@keyframes flashcard-enter {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.flashcard-face {
  grid-area: 1 / 1;
  display: flex;
  flex-direction: column;
  padding: 16px 20px;
  border-radius: 8px;
  border: 1px solid #dcdcdc;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transition: background 0.15s ease;
}

@media (prefers-color-scheme: dark) {
  .flashcard-face { border-color: #4e4e57; }
}
[data-theme=dark] .flashcard-face { border-color: #4e4e57; }
[data-theme=light] .flashcard-face { border-color: #dcdcdc; }

.flashcard-front:hover {
  background: rgba(100, 149, 237, 0.08);
}

.flashcard-face.flashcard-back {
  transform: rotateY(180deg);
  border-color: #6495ed;
  background: rgba(100, 149, 237, 0.08);
}

.flashcard-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.flashcard-topic,
.flashcard-side {
  opacity: 0.6;
}

.flashcard-back .flashcard-side {
  color: #6495ed;
  opacity: 1;
}

.flashcard-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 16px 0;
  font-size: 1.15rem;
  text-align: left;
  user-select: text;
}

.flashcard-front .flashcard-body {
  font-weight: 600;
}

.flashcard-back .flashcard-body {
  font-size: 1rem;
}

.flashcard-body p,
.flashcard-missed-answer p {
  margin: 0 0 10px;
}

.flashcard-body p:last-child,
.flashcard-missed-answer p:last-child {
  margin-bottom: 0;
}

.flashcard-body pre,
.flashcard-missed-answer pre {
  margin: 0 0 10px;
  font-size: 0.85rem;
  overflow-x: auto;
}

.flashcard-body pre:last-child,
.flashcard-missed-answer pre:last-child {
  margin-bottom: 0;
}

.flashcard-hint {
  font-size: 0.8rem;
  text-align: center;
  opacity: 0.45;
}

.flashcard-actions,
.flashcard-rating {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* The theme caps .button at max-width: 40% of its parent, which squeezes buttons inside the actions wrapper. */
.quiz-controls .flashcard-actions .button {
  max-width: none;
  white-space: nowrap;
}


.quiz-controls .flashcard-rating button {
  padding: 10px 22px;
}

.flashcard-review.selected {
  border-color: #c0392b;
  background: rgba(192, 57, 43, 0.15);
}

.flashcard-known.selected {
  outline: 2px solid #3c9a5f;
  outline-offset: 2px;
}

.quiz-results-actions {
  flex-wrap: wrap;
}

.flashcard-missed-answer {
  font-size: 0.9rem;
  opacity: 0.85;
}

@media (prefers-reduced-motion: reduce) {
  .flashcard-inner { transition-duration: 0.01s; }
  .flashcard-inner.enter { animation: none; }
}

@media (max-width: 600px) {
  .flashcard-inner { min-height: 200px; }
  .quiz-controls { flex-wrap: wrap; }
  .flashcard-rating { flex: 1; justify-content: flex-end; }
}

.flashcard-body ul,
.flashcard-missed-answer ul {
  margin: 0 0 10px;
  padding-left: 20px;
}

.flashcard-body ul:last-child,
.flashcard-missed-answer ul:last-child {
  margin-bottom: 0;
}

.flashcard-body li,
.flashcard-missed-answer li {
  margin-bottom: 4px;
}