/* ── Interview Q&A: Accordion ────────────────────────────── */

.qa-accordion {
  border: 1px solid var(--border);
  border-radius: var(--radius-md, 8px);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: border-color 0.2s;
}

.qa-accordion:hover {
  border-color: var(--accent, #f59e0b);
}

.qa-accordion[open] {
  border-color: var(--accent, #f59e0b);
}

.qa-question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--text-primary);
  background: var(--surface-2, var(--bg-secondary));
  transition: background 0.15s;
}

.qa-question::-webkit-details-marker { display: none; }

.qa-question:hover {
  background: var(--surface-3, var(--bg-hover));
}

.qa-badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--accent, #f59e0b);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.qa-question > span:nth-child(2) {
  flex: 1;
}

.qa-chevron {
  flex-shrink: 0;
  color: var(--text-secondary);
  transition: transform 0.2s ease;
}

.qa-accordion[open] .qa-chevron {
  transform: rotate(180deg);
}

.qa-answer {
  padding: 1rem 1rem 1rem 1.25rem;
  border-top: 1px solid var(--border);
  border-left: 3px solid var(--accent, #f59e0b);
  background: var(--bg-primary);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-primary);
}

.qa-answer > :first-child { margin-top: 0; }
.qa-answer > :last-child  { margin-bottom: 0; }

.qa-answer p   { margin: 0.5rem 0; }
.qa-answer ul,
.qa-answer ol  { margin: 0.5rem 0 0.5rem 1.25rem; }
.qa-answer pre { margin: 0.75rem 0; }

.qa-source {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.qa-source a {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  opacity: 0.75;
  transition: opacity 0.15s;
}

.qa-source a:hover { opacity: 1; color: var(--accent); }

/* ── Interview Q&A: Flashcard Deck ───────────────────────── */

.flashcard-deck {
  perspective: 1200px;
  margin: 1.5rem 0;
}

.flashcard {
  width: 100%;
  min-height: 160px;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 160px;
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-md, 8px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

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

.flashcard-front,
.flashcard-back {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  border-radius: var(--radius-md, 8px);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.5;
}

.flashcard-front {
  background: var(--surface-2, var(--bg-secondary));
  border: 2px solid var(--border);
  font-weight: 600;
  color: var(--text-primary);
}

.flashcard-back {
  background: color-mix(in srgb, var(--accent, #f59e0b) 8%, var(--bg-primary));
  border: 2px solid var(--accent, #f59e0b);
  transform: rotateY(180deg);
  color: var(--text-primary);
}

.flashcard-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.fc-prev,
.fc-next,
.fc-flip {
  padding: 0.375rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm, 6px);
  background: var(--surface-2, var(--bg-secondary));
  color: var(--text-primary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.fc-prev:hover,
.fc-next:hover,
.fc-flip:hover {
  background: var(--surface-3, var(--bg-hover));
  border-color: var(--accent, #f59e0b);
}

.fc-prev:disabled,
.fc-next:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.fc-counter {
  font-size: 0.8rem;
  color: var(--text-secondary);
  min-width: 3.5rem;
  text-align: center;
}

.fc-flip {
  margin-left: 0.5rem;
  border-color: var(--accent, #f59e0b);
  color: var(--accent, #f59e0b);
}

/* ── Dark theme overrides ─────────────────────────────────── */

[data-theme="dark"] .qa-accordion {
  border-color: var(--border);
}

[data-theme="dark"] .flashcard-front {
  background: var(--surface-2, #1e2432);
}

[data-theme="dark"] .fc-prev,
[data-theme="dark"] .fc-next,
[data-theme="dark"] .fc-flip {
  background: var(--surface-2, #1e2432);
}

/* ── Section category dividers ───────────────────────────── */

.qa-category-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 2rem 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent, #f59e0b);
}

.qa-category-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.qa-stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 1rem 0 1.5rem;
  padding: 0.875rem 1rem;
  background: var(--surface-2, var(--bg-secondary));
  border-radius: var(--radius-md, 8px);
  border: 1px solid var(--border);
}

.qa-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.125rem;
}

.qa-stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent, #f59e0b);
}

.qa-stat-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}