/* Флешкарты: flip-карточка + темы (терминальная тема сайта) */

/* ----- список тем ----- */
.flashcard-topic-link {
  text-decoration: none;
}
.flashcard-topic {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.flashcard-topic:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.flashcard-topic .flashcard-topic-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}
.flashcard-topic .flashcard-topic-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.flashcard-topic .flashcard-count {
  align-self: flex-start;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-soft);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 20px;
}

/* кликабельная плитка выбора темы (label вокруг checkbox) */
.flashcard-topic-select {
  cursor: pointer;
  position: relative;
  margin-bottom: 0;
  justify-content: space-between;
}
.flashcard-topic-select .topic-check {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  margin: 0;
}
.flashcard-topic-select .flashcard-topic-name {
  padding-right: 26px;
}
.flashcard-topic-select:has(.topic-check:checked) {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-soft), 0 12px 24px -14px var(--accent-glow);
}

/* ----- тренировка ----- */
.flashcard-stage {
  perspective: 1600px;
  margin-bottom: 24px;
}
.flashcard {
  position: relative;
  width: 100%;
  height: 340px;                 /* одинаковая высота обеих граней */
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
  cursor: pointer;
}
.flashcard.is-flipped {
  transform: rotateY(180deg);
}
.flashcard-face {
  position: absolute;
  inset: 0;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px 30px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.6);
}
.flashcard-face::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  border-radius: 14px 14px 0 0;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.35;
  pointer-events: none;
}
.flashcard-front { justify-content: center; }
.flashcard-back {
  transform: rotateY(180deg);
  justify-content: flex-start;
}
.flashcard-front .flashcard-face-label {
  color: var(--accent);
  border: 1px solid var(--border-soft);
  background: var(--accent-soft);
  align-self: flex-start;
}
.flashcard-back .flashcard-face-label {
  color: var(--method-get);
  border: 1px solid var(--border);
  background: var(--surface);
  align-self: flex-start;
}
.flashcard-face-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: lowercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}
.flashcard-hint {
  margin-top: auto;
  padding-top: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  opacity: 0.8;
}
/* переворот плавнее за счёт блика на краю */
.flashcard.is-flipped .flashcard-face {
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.55),
              inset 0 0 0 1px var(--border);
}
.flashcard-q {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}
.flashcard-a {
  color: var(--text);
  font-size: 1.02rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}
.flashcard-hint {
  margin-top: auto;
  padding-top: 14px;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.flashcard-progress {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* карточка в фокусе (доступность) */
.flashcard:focus-visible {
  outline: none;
}
.flashcard:focus-visible .flashcard-front {
  box-shadow: 0 0 0 2px var(--accent-glow), 0 24px 48px -24px rgba(0, 0, 0, 0.6);
}

/* высота карточки на маленьких экранах */
@media (max-width: 575.98px) {
  .flashcard { height: 300px; }
  .flashcard-face { padding: 20px 22px; }
  .flashcard-q { font-size: 1.1rem; }
}