/* ========================================================
   Oral Exam Flashcard System (구술실기 플래시카드)
   원본: si2.html 인라인 CSS (보디빌딩·수영)
   사용처: cft.html (건강운동관리사)
   ======================================================== */

/* ── Topbar ── */
.oral-topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.oral-topbar__back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  border: none;
  background: #f5f5f7;
  color: #86868b;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.oral-topbar__back:hover { background: #e8e8ed; color: #1d1d1f; }
.oral-topbar__title {
  font-size: 17px;
  font-weight: 600;
  color: #1d1d1f;
  letter-spacing: -0.022em;
}

/* ── Study top bar ── */
.oral-study-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 48px;
  margin-bottom: 0;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.oral-study-topbar__back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;
  background: #f5f5f7;
  color: #86868b;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.oral-study-topbar__back:hover { background: #e8e8ed; color: #1d1d1f; }
.oral-study-topbar__info {
  flex: 1;
  text-align: center;
  font-size: 14px;
  color: #86868b;
}
.oral-study-topbar__count {
  font-size: 12px;
  color: #86868b;
  white-space: nowrap;
  flex-shrink: 0;
}
.oral-study-topbar__count strong { font-weight: 600; }
.oral-study-topbar__count .c-known { color: var(--penguin-navy, #1D2F4E); cursor: pointer; }
.oral-study-topbar__count .c-unknown { color: var(--penguin-navy, #1D2F4E); cursor: pointer; }
.oral-study-topbar__count .c-known:hover,
.oral-study-topbar__count .c-unknown:hover { text-decoration: underline; }

/* ── Card list bottom sheet ── */
.oral-sheet-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.35);
  z-index: 9999; display: none; align-items: flex-end; justify-content: center;
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
}
.oral-sheet-overlay.is-open { display: flex; }
.oral-sheet {
  width: 100%; max-width: 520px; max-height: 88vh;
  background: #fff; border-radius: 16px 16px 0 0;
  display: flex; flex-direction: column;
  animation: oral-sheet-up .25s ease;
  overflow: hidden;
}
@keyframes oral-sheet-up { from { transform: translateY(100%); } to { transform: translateY(0); } }
.oral-sheet__header {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 16px; border-bottom: 1px solid #f0f0f2; flex-shrink: 0;
  background: #fff;
  flex-wrap: wrap;
}
.oral-sheet__title { font-size: 16px; font-weight: 700; color: #1d1d1f; flex: 1; min-width: 100px; }
.oral-sheet__close {
  width: 36px; height: 36px; border-radius: 50%; border: none;
  background: #f0f0f2; cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: #1d1d1f; line-height: 1; font-weight: 600;
  transition: background 0.15s;
}
.oral-sheet__close:hover { background: #e5e5ea; }
/* 시트 헤더 액션 버튼 그룹 */
.oral-sheet__actions { display: flex; align-items: center; gap: 6px; }
.oral-sheet__action-btn {
  font-family: inherit; font-size: 12px; font-weight: 600;
  padding: 6px 10px; border-radius: 9999px; border: none; cursor: pointer;
  background: #f0f0f2; color: #1d1d1f; transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
@media (max-width: 380px) {
  .oral-sheet__action-btn { padding: 6px 8px; font-size: 11px; }
}
.oral-sheet__action-btn:hover { background: #e5e5ea; }
.oral-sheet__action-btn--danger { background: rgba(255,59,48,0.10); color: #c0392b; }
.oral-sheet__action-btn--danger:hover { background: rgba(255,59,48,0.18); }
.oral-sheet__action-btn--active { background: var(--penguin-navy, #1D2F4E); color: #fff; }
.oral-sheet__action-btn--active:hover { background: #16243d; }
/* 편집 모드 footer */
.oral-sheet__footer {
  background: #fff;
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; border-top: 1px solid #f0f0f2; flex-shrink: 0;
}
.oral-sheet__footer #oral-sheet-selected-count { flex: 1; font-size: 13px; color: #86868b; }
/* 편집 모드 체크박스 (item 좌측) */
.oral-sheet__check {
  width: 20px; height: 20px; border-radius: 50%; border: 2px solid #d2d2d7;
  background: #fff; flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  margin-right: 4px;
}
.oral-sheet__item--selected .oral-sheet__check {
  background: var(--penguin-navy, #1D2F4E); border-color: var(--penguin-navy, #1D2F4E);
}
.oral-sheet__check svg { width: 12px; height: 12px; color: #fff; opacity: 0; }
.oral-sheet__item--selected .oral-sheet__check svg { opacity: 1; }
.oral-sheet__item--selected .oral-sheet__item-header { background: rgba(29,47,78,0.04); }
.oral-sheet__body { overflow-y: auto; padding: 8px 0; flex: 1; }
.oral-sheet__item { padding: 0; border-bottom: 1px solid #f5f5f7; }
.oral-sheet__item:last-child { border-bottom: none; }
.oral-sheet__item-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 20px; cursor: pointer; user-select: none;
}
.oral-sheet__item-header:active { background: #f9f9fb; }
.oral-sheet__item-arrow {
  flex-shrink: 0; width: 16px; height: 16px; color: #86868b;
  transition: transform .2s ease;
}
.oral-sheet__item.is-open .oral-sheet__item-arrow { transform: rotate(90deg); }
.oral-sheet__item-info { flex: 1; min-width: 0; }
.oral-sheet__item-cat {
  font-size: 11px; font-weight: 600; color: #86868b;
  margin-bottom: 2px; letter-spacing: .3px;
}
.oral-sheet__item-q { font-size: 14px; font-weight: 600; color: #1d1d1f; line-height: 1.4; }
.oral-sheet__item-body { display: none; padding: 0 20px 12px 44px; }
.oral-sheet__item.is-open .oral-sheet__item-body { display: block; }
.oral-sheet__item-a { font-size: 13px; color: #6e6e73; line-height: 1.45; white-space: pre-line; }
.oral-sheet__item-remove {
  margin-top: 10px; padding: 6px 14px; border-radius: 8px;
  border: 1px solid #e8e8ed; background: #fff; color: var(--penguin-navy, #1D2F4E);
  font-size: 12px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.oral-sheet__item-remove:active { background: #fff5f5; }
.oral-sheet__empty { padding: 40px 20px; text-align: center; color: #86868b; font-size: 14px; }

/* ── Nav arrows ── */
.oral-nav-arrow {
  flex-shrink: 0; width: 36px; height: 36px; border-radius: 50%;
  border: none; background: rgba(29,47,78,0.06); color: #86868b;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background .15s, color .15s, opacity .15s;
}
.oral-nav-arrow:hover { background: rgba(29,47,78,0.12); color: #1d1d1f; }
.oral-nav-arrow:active { background: rgba(29,47,78,0.18); }
.oral-nav-arrow:disabled { opacity: 0.3; pointer-events: none; }

/* ── Progress bar ── */
.oral-study-progress {
  width: 100%; max-width: 520px;
  margin-left: auto; margin-right: auto;
  height: 3px; background: #f0f0f2;
  border-radius: 2px; margin-bottom: 20px;
  overflow: hidden;
}
.oral-study-progress__fill {
  height: 100%; background: var(--penguin-navy, #1D2F4E);
  border-radius: 2px; transition: width 0.3s ease;
}

/* ── Card ── */
.oral-card {
  position: relative;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  overflow: hidden;
  width: 100%;
  max-width: 520px;
  cursor: pointer;
  /* 최소 높이 — 1줄/2줄 질문 변동 흡수 (몰라요/알아요 버튼 위치 안정).
     case 콘텐츠는 이 위에 더 추가되므로 case 카드는 자연 높이로 더 커짐 */
  min-height: 200px;
}
.oral-card__question-zone {
  padding: 28px 24px;
  text-align: center;
}
.oral-card__cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--penguin-navy, #1D2F4E);
  padding: 3px 12px;
  background: rgba(29,47,78,0.06);
  border-radius: 9999px;
  margin-bottom: 12px;
}
.oral-card__star {
  display: none;
  font-size: 11px;
  font-weight: 600;
  color: #ff9500;
  padding: 2px 10px;
  background: rgba(255,149,0,0.08);
  border-radius: 9999px;
  margin-bottom: 10px;
}
/* 북마크 별 — 카드 우상단 토글 (영구, 시험 직전 빠른 복습용 즐겨찾기) */
.oral-card__bookmark {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: #d2d2d7;
  z-index: 5;
  border-radius: 50%;
  transition: color 0.15s, background 0.15s, transform 0.1s;
}
.oral-card__bookmark:hover { color: #86868b; background: rgba(0,0,0,0.04); }
.oral-card__bookmark:active { transform: scale(0.92); }
.oral-card__bookmark--on { color: #FFB800; }
.oral-card__bookmark--on svg { fill: #FFB800; }
.oral-card__bookmark--on:hover { color: #FFB800; background: rgba(255,184,0,0.08); }
.oral-card__q {
  font-size: 21px;
  font-weight: 700;
  color: #1d1d1f;
  line-height: 1.4;
  letter-spacing: -0.022em;
  white-space: pre-line;
}
/* 예시 영역 — grid-template-rows 0fr↔1fr 트릭으로 콘텐츠 자연 높이 트랜지션
   max-height의 "콘텐츠 < max 일 때 시각적 트랜지션 조기 종료" 이슈가 없어 진짜 부드러움.
   slide-ease(=캐러셀과 같은 곡선)로 카드 슬라이드와 톤 맞춤. */
.oral-card__case-grid {
  display: grid;
  grid-template-rows: 0fr;
  margin-top: 0;
  transition:
    grid-template-rows 0.55s cubic-bezier(0.32, 0.72, 0, 1),
    margin-top 0.55s cubic-bezier(0.32, 0.72, 0, 1);
}
.oral-card__case-grid.is-on {
  grid-template-rows: 1fr;
  margin-top: 14px;
}
.oral-card__case {
  background: #f5f5f7;
  border-radius: 10px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 400;
  color: #424245;
  line-height: 1.55;
  white-space: pre-line;
  text-align: left;
  overflow: hidden;
  opacity: 0;
  transition:
    opacity 0.4s cubic-bezier(0.32, 0.72, 0, 1) 0.08s,
    padding 0.55s cubic-bezier(0.32, 0.72, 0, 1);
}
.oral-card__case-grid.is-on .oral-card__case {
  opacity: 1;
  padding: 12px 14px;
}
.oral-card__hint {
  font-size: 13px;
  color: #aeaeb2;
  margin-top: 16px;
  transition: opacity 0.2s;
}
.oral-card__divider {
  height: 1px;
  background: rgba(0,0,0,0.06);
  margin: 0 24px;
  opacity: 0;
  transition: opacity 0.2s;
}
.oral-card__answer-zone {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, opacity 0.25s ease-out 0.1s;
  padding: 0 24px;
  text-align: left;
}
.oral-card--revealed .oral-card__hint { opacity: 0; }
.oral-card--revealed .oral-card__divider { opacity: 1; }
.oral-card--revealed .oral-card__answer-zone { max-height: 1600px; opacity: 1; padding: 20px 24px 28px; }
.oral-card__a {
  font-size: 15px;
  font-weight: 400;
  color: #1d1d1f;
  line-height: 1.75;
  white-space: pre-line;
  text-align: left;
}
/* 카드 내 이미지 (건강운동관리사 신규) */
.oral-card__img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 0 auto 16px;
  background: #f5f5f7;
}

/* ── Actions ── */
.oral-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 16px;
  width: 100%;
  max-width: 520px;
}
.oral-actions.oral-hidden { display: none; }
.oral-btn {
  height: 52px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.oral-btn--unknown { background: #1d1d1f; color: #fff; }
.oral-btn--unknown:hover { background: #000; }
.oral-btn--known { background: var(--penguin-navy, #1D2F4E); color: #fff; }
.oral-btn--known:hover { background: #162640; transform: translateY(-1px); }
.oral-btn:disabled { opacity: 0.3; pointer-events: none; }

/* ── Card animations ── */
.oral-exit-left { animation: oralExitL 0.25s ease forwards; }
.oral-exit-right { animation: oralExitR 0.25s ease forwards; }
.oral-enter { animation: oralEnter 0.25s ease forwards; }
@keyframes oralExitL { to { transform: translateX(-80%); opacity: 0; } }
@keyframes oralExitR { to { transform: translateX(80%); opacity: 0; } }
@keyframes oralEnter { from { transform: translateX(40px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── Category multi-select chips ── */
.oral-catgroup {
  margin-bottom: 20px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.oral-catgroup__box {
  background: #f5f5f7;
  border-radius: 14px;
  overflow: hidden;
}
/* 아코디언 헤더 — 클릭하면 카테고리 칩이 펼쳐짐 */
.oral-catgroup__header {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 14px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background 0.15s;
}
.oral-catgroup__header:hover { background: rgba(0,0,0,0.02); }
.oral-catgroup__label {
  font-size: 13px;
  font-weight: 700;
  color: var(--penguin-navy, #1D2F4E);
  letter-spacing: -0.01em;
  flex: 1;
}
.oral-catgroup__count {
  font-size: 11px;
  font-weight: 500;
  color: #86868b;
}
.oral-catgroup__arrow {
  color: #86868b;
  flex-shrink: 0;
  transition: transform 0.2s;
}
.oral-catgroup__box--open .oral-catgroup__arrow { transform: rotate(180deg); }
.oral-catgroup__body {
  display: none;
  padding: 0 14px 12px;
}
.oral-catgroup__box--open .oral-catgroup__body { display: block; }
.oral-catgroup__actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}
.oral-catgroup__toggle {
  font-size: 11px;
  font-weight: 500;
  color: #86868b;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 2px 0;
  transition: color 0.15s;
}
.oral-catgroup__toggle:hover { color: var(--penguin-navy, #1D2F4E); }
/* 버튼·기능 안내 리스트 */
.oral-help-list {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}
.oral-help-list dt {
  font-weight: 700;
  color: var(--penguin-navy, #1D2F4E);
  margin-top: 10px;
}
.oral-help-list dt:first-of-type { margin-top: 0; }
.oral-help-list dd {
  margin: 2px 0 0;
  color: #6e6e73;
}
.oral-help-list strong {
  color: #1d1d1f;
  font-weight: 600;
}
.oral-catgroup__chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.oral-mchip {
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 500;
  color: #aeaeb2;
  background: #fff;
  border: 1.5px solid #e8e8ed;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  font-family: inherit;
}
.oral-mchip:hover { color: #1d1d1f; border-color: #d1d1d6; }
.oral-mchip--on {
  background: #f5f5f7;
  color: var(--penguin-navy, #1D2F4E);
  font-weight: 600;
  border-color: var(--penguin-navy, #1D2F4E);
  opacity: 0.75;
}

/* ── Inline settings chips ── */
.oral-opts {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.oral-opts--quick { justify-content: center; }
.oral-opt {
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 500;
  color: #86868b;
  background: #f5f5f7;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  font-family: inherit;
}
.oral-opt:hover { color: #1d1d1f; background: #e8e8ed; }
.oral-opt--on {
  background: var(--penguin-navy, #1D2F4E);
  color: #fff;
  box-shadow: 0 1px 4px rgba(29, 47, 78, 0.18);
}
/* 큰 칩 (셔플/빈출만/타이머 메인 토글) — 아이콘 + 라벨, 시인성 ↑ */
.oral-opt--lg {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 600;
  color: #1d1d1f;
  background: #f0f0f3;
  letter-spacing: -0.01em;
}
.oral-opt--lg:hover { background: #e6e6ea; color: #000; }
.oral-opt--lg.oral-opt--on {
  background: var(--penguin-navy, #1D2F4E);
  color: #fff;
}
.oral-opt__icon { flex-shrink: 0; opacity: 0.85; }
.oral-opt--on .oral-opt__icon { opacity: 1; }
/* 펭귄 픽 — 로고를 currentColor 마스크로 처리: 별 아이콘처럼 모든 상태/모드에서 글자색 자동 추종 */
.oral-opt__icon--logo {
  display: inline-block;
  width: 11px;
  height: 15px;
  background-color: currentColor;
  -webkit-mask: url("/images/firstpenguin-logo2.png") center / contain no-repeat;
  mask: url("/images/firstpenguin-logo2.png") center / contain no-repeat;
}

/* 인라인 타이머 초 셀렉터 — 타이머 ON 시 옆에 자연스럽게 붙어 나타남 */
.oral-opt-timer-sec {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 12px 0 14px;
  height: 32px;
  background: #fff;
  border: 1.5px solid var(--penguin-navy, #1D2F4E);
  border-radius: 9999px;
  color: var(--penguin-navy, #1D2F4E);
  font-size: 13px;
  font-weight: 600;
  position: relative;
  cursor: pointer;
  transition: background 0.15s;
}
.oral-opt-timer-sec:hover { background: rgba(29, 47, 78, 0.05); }
.oral-opt-timer-sec svg { color: var(--penguin-navy, #1D2F4E); }
.oral-opt-timer-sel {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background: transparent;
  border: none;
  outline: none;
  font-size: 13px;
  font-weight: 600;
  color: inherit;
  font-family: inherit;
  padding: 0 2px 0 0;
  cursor: pointer;
  letter-spacing: -0.01em;
}
.oral-opt-timer-sel::-ms-expand { display: none; }

/* ── Responsive ── */
@media (max-width: 576px) {
  .oral-card__q { font-size: 17px; }
  .oral-card__a { font-size: 14px; }
  .oral-btn { height: 48px; font-size: 15px; }
}

/* ── Oral Guide ── */
.oral-guide-section { margin-bottom: 32px; }
.oral-guide-heading {
  font-size: 15px;
  font-weight: 600;
  color: #1d1d1f;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.oral-guide-card {
  background: #f5f5f7;
  border-radius: 14px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.oral-guide-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}
.oral-guide-row span { color: #86868b; }
.oral-guide-row strong { color: #1d1d1f; font-weight: 600; font-size: 13px; }
.oral-guide-list { display: flex; flex-direction: column; gap: 0; }
.oral-guide-item {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.oral-guide-item:last-child { border-bottom: none; }
.oral-guide-num {
  flex-shrink: 0;
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--penguin-navy, #1D2F4E);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  border-radius: 8px;
}
.oral-guide-item strong {
  font-size: 15px;
  font-weight: 600;
  color: #1d1d1f;
  display: block;
  margin-bottom: 4px;
}
.oral-guide-item p {
  font-size: 14px;
  color: #6e6e73;
  line-height: 1.5;
}
.oral-faq { border-bottom: 1px solid rgba(0,0,0,0.04); }
.oral-faq:last-child { border-bottom: none; }
.oral-faq summary {
  padding: 14px 0;
  font-size: 15px;
  font-weight: 500;
  color: #1d1d1f;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.oral-faq summary::after {
  content: '+';
  font-size: 18px;
  color: #aeaeb2;
  font-weight: 300;
  transition: transform 0.2s;
}
.oral-faq[open] summary::after { content: '−'; }
.oral-faq summary::-webkit-details-marker { display: none; }
.oral-faq p {
  padding: 0 0 14px;
  font-size: 14px;
  color: #6e6e73;
  line-height: 1.6;
}

/* ── Card Stage with peek (이전/다음 미리보기) ──
   peek은 메인과 동일한 .oral-card 구조. 외측 가장자리는 mask-image로 transparent fade
   (하드컷이 아니라 stage 클립선 도달 전에 alpha 0이 되도록 = 소프트컷).
   peek 자체는 opacity 0.5로 글씨를 희미하게.
   글래스모피즘 오버레이(::after)는 외측에 frosted glass 효과.
   슬라이드 시 mask stop을 @property로 transition → 메인 자리 도착할 때 fade·opacity·glass 모두 풀림.
   세 카드가 같은 transform 양으로 동시에 이동. */


.oral-card-stage {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: stretch;
  overflow: hidden;
  padding: 4px 0;
  --peek-offset: 160px;  /* 넷플릭스 캐러셀 스타일 — 옆 카드 본문이 잘 보임 */
  --main-half: 260px;
  --peek-scale: 0.92;    /* 카드가 살짝 뒤에 있는 느낌 — 메인보다 작게 */
  --slide-duration: 0.4s;
  --slide-ease: cubic-bezier(0.32, 0.72, 0, 1);
  /* 좌우 가장자리 페이드 — 통과하는 peek 카드가 칼같이 끊기지 않고 부드럽게 사라짐 */
  -webkit-mask-image: linear-gradient(to right,
    transparent 0%,
    black 11%,
    black 89%,
    transparent 100%);
          mask-image: linear-gradient(to right,
    transparent 0%,
    black 11%,
    black 89%,
    transparent 100%);
}
.oral-card-row {
  position: relative;
  z-index: 2;
  width: 100%;
}

/* peek 카드 — 넷플릭스 가로 캐러셀 스타일. 살짝 작게(scale) + 약간 흐리게(opacity) 해서
   "뒤에 있는 카드" 느낌. 슬라이드 시 scale·opacity·translate가 함께 transition돼서 메인 사이즈로 부드럽게 합류. */
.oral-card-peek {
  position: absolute;
  top: 4px;
  width: 520px;
  max-width: 90%;
  pointer-events: none;
  opacity: 0.12;
  transform: scale(var(--peek-scale));
  transform-origin: center center;
  z-index: 1;
  overflow: hidden;
  transition:
    transform var(--slide-duration) var(--slide-ease),
    opacity var(--slide-duration) var(--slide-ease);
  will-change: transform, opacity;
}

/* 기본 위치 — 메인 가장자리에서 peek-offset 만큼 안쪽으로 들어와 있음
   peek2(--prev2/--next2)는 prev/next에서 한 슬롯(peek-offset + main-half) 더 바깥으로
   stage overflow:hidden + mask로 가려져서 평소엔 안 보이지만, 슬라이드 시 prev/next 자리로 굴러 들어옴 */
.oral-card-peek--prev  { right: calc(50% + var(--peek-offset)); }
.oral-card-peek--next  { left:  calc(50% + var(--peek-offset)); }
.oral-card-peek--prev2 { right: calc(50% + var(--peek-offset) * 2 + var(--main-half)); }
.oral-card-peek--next2 { left:  calc(50% + var(--peek-offset) * 2 + var(--main-half)); }

/* peek 카드 대칭 보정 — 메인은 본문 정렬이 좌측인 영역(case/answer)이 있는데,
   peek 카드는 좌우 대칭 위치라 좌측 정렬 텍스트가 그대로면 시각적으로 비대칭.
   peek 카드 한정으로 모든 텍스트를 가운데 정렬. 카드 중심이 stage 외측이라 짧은
   텍스트는 거의 안 보이고, 긴 텍스트만 양쪽 가장자리가 mask 페이드 영역에서 살짝
   비치므로 prev/next가 동일한 양으로 보임. */
.oral-card-peek .oral-card__case,
.oral-card-peek .oral-card__answer-zone,
.oral-card-peek .oral-card__a {
  text-align: center;
}

/* peek 카드 자체가 없을 때 (덱 끝) */
.oral-card-peek.is-hidden { opacity: 0; }
.oral-card-peek--prev.is-hidden,
.oral-card-peek--prev2.is-hidden { transform: translateX(-80px) scale(var(--peek-scale)); }
.oral-card-peek--next.is-hidden,
.oral-card-peek--next2.is-hidden { transform: translateX(80px) scale(var(--peek-scale)); }

/* === 5장 동시 시프트 — 한 슬롯(peek-offset + main-half) 만큼 같은 방향으로 일제히 이동
   각 카드의 시작/끝 사이즈·opacity가 자연스럽게 다르므로 transition 한 번에 다이얼 회전 효과 === */
/* --- forward (다음 카드, 전체가 왼쪽으로) --- */
.oral-card-peek--next.is-shift-fwd {
  /* +1 → 0(메인): peek → 메인 사이즈로 합류 */
  transform: translateX(calc(-1 * (var(--peek-offset) + var(--main-half)))) scale(1);
  opacity: 1;
  z-index: 3;
}
.oral-card-peek--next2.is-shift-fwd {
  /* +2 → +1: peek 사이즈 유지하며 next 자리로 굴러옴 */
  transform: translateX(calc(-1 * (var(--peek-offset) + var(--main-half)))) scale(var(--peek-scale));
}
.oral-card-peek--prev.is-shift-fwd {
  /* -1 → -2: peek 사이즈 유지하며 prev2 자리로 (mask 페이드존으로 진입) */
  transform: translateX(calc(-1 * (var(--peek-offset) + var(--main-half)))) scale(var(--peek-scale));
}
.oral-card-peek--prev2.is-shift-fwd {
  /* -2 → -3: 화면 밖으로 더 멀리, 작아지면서 사라짐 */
  transform: translateX(calc(-1 * (var(--peek-offset) + var(--main-half)))) scale(0.85);
  opacity: 0;
}

/* --- backward (이전 카드, 전체가 오른쪽으로) --- */
.oral-card-peek--prev.is-shift-bwd {
  /* -1 → 0(메인) */
  transform: translateX(calc(var(--peek-offset) + var(--main-half))) scale(1);
  opacity: 1;
  z-index: 3;
}
.oral-card-peek--prev2.is-shift-bwd {
  /* -2 → -1: prev 자리로 굴러옴 */
  transform: translateX(calc(var(--peek-offset) + var(--main-half))) scale(var(--peek-scale));
}
.oral-card-peek--next.is-shift-bwd {
  /* +1 → +2: next2 자리로 (mask 페이드존으로 진입) */
  transform: translateX(calc(var(--peek-offset) + var(--main-half))) scale(var(--peek-scale));
}
.oral-card-peek--next2.is-shift-bwd {
  /* +2 → +3: 화면 밖으로 사라짐 */
  transform: translateX(calc(var(--peek-offset) + var(--main-half))) scale(0.85);
  opacity: 0;
}

/* === 메인 카드 wrapper — peek 자리로 시프트하면서 peek 사이즈/투명도로 합류
   opacity 0 대신 0.78(peek 값)을 쓰는 이유: 슬라이드 끝 시점에 wrapper가 prev/next 자리에 visually 머물러야
   직후 SNAP에서 새 prev/next peek가 같은 자리에 같은 콘텐츠로 인계되며 끊김이 안 보임 === */
#oral-card-wrapper {
  transition:
    transform var(--slide-duration) var(--slide-ease),
    opacity var(--slide-duration) var(--slide-ease);
  will-change: transform, opacity;
  transform-origin: center center;
}
#oral-card-wrapper.oral-shift-left {
  transform: translateX(calc(-1 * (var(--peek-offset) + var(--main-half)))) scale(var(--peek-scale));
  opacity: 0.6;
}
#oral-card-wrapper.oral-shift-right {
  transform: translateX(calc(var(--peek-offset) + var(--main-half))) scale(var(--peek-scale));
  opacity: 0.6;
}

/* transition 일시 정지 (스냅 리셋용) */
.oral-card-peek.no-transition,
.oral-card-peek.no-transition::after,
#oral-card-wrapper.no-transition {
  transition: none !important;
}

/* 즉시 collapse용 (animNext 시작 시 reveal 해제) */
.oral-card--snap,
.oral-card--snap .oral-card__answer-zone,
.oral-card--snap .oral-card__divider,
.oral-card--snap .oral-card__hint {
  transition: none !important;
}

/* ─── 반응형 캐러셀 ───
   PC default: peek-offset 160, main-half 260 (.oral-card-peek width 520 max-width:90%)
   605~700px: PC default 그대로 사용 (row max-width 604 hit 영역이라 PC 공식이 그대로 맞음)
   0~604px: 모바일 정확 fix — 모든 수치를 vw 기반으로 계산해 어긋남 0 */
@media (min-width: 1024px) {
  .oral-card-stage { max-width: 800px; --peek-offset: 200px; }
}
@media (max-width: 604px) {
  /* JS가 wrapper.offsetWidth를 측정해 --oral-card-w / --oral-card-half를 root에 주입.
     이 값이 곧 메인 카드 폭이라 peek-width / main-half가 실측과 픽셀 단위로 일치.
     fallback(JS 미실행 시): 화살표 36 + gap 6 = 42 가정 기반 vw 공식. */
  .oral-card-stage {
    --peek-offset: var(--oral-card-half, calc(50vw - 42px));
    --main-half: var(--oral-card-half, calc(50vw - 42px));
    --peek-scale: 0.95;
  }
  .oral-card-peek {
    width: var(--oral-card-w, calc(100vw - 84px));
    max-width: none;
  }
  /* 5장 → 3장: prev2/next2는 mask 영역 밖이라 어차피 안 보임, 명시적으로 숨김 */
  .oral-card-peek--prev2,
  .oral-card-peek--next2 { display: none; }
  /* wrapper transform 거리(=카드 한 폭)가 화면 가장자리까지 떠밀려 보이는 over-shoot 차단:
     시프트 시 그 자리에서 fade + 살짝 scale로 사라지게 */
  #oral-card-wrapper.oral-shift-left,
  #oral-card-wrapper.oral-shift-right {
    opacity: 0;
    transform: scale(0.95);
  }
}

/* ── Search ── */
.oral-search {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.oral-search__box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #f5f5f7;
  border-radius: 12px;
  transition: background 0.15s, box-shadow 0.15s;
}
.oral-search__box:focus-within {
  background: #fff;
  box-shadow: 0 0 0 2px var(--penguin-navy, #1D2F4E);
}
.oral-search__icon {
  flex-shrink: 0;
  color: #86868b;
}
.oral-search__box input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 14px;
  font-family: inherit;
  color: #1d1d1f;
  outline: none;
  min-width: 0;
}
.oral-search__box input::placeholder { color: #aeaeb2; }
.oral-search__box input::-webkit-search-cancel-button { display: none; }
.oral-search__clear {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.12);
  color: #fff;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
}
.oral-search__clear:hover { background: rgba(0,0,0,0.2); }
.oral-search__meta {
  font-size: 12px;
  color: #86868b;
  padding: 0 4px;
}
.oral-search__meta strong {
  color: var(--penguin-navy, #1D2F4E);
  font-weight: 600;
}
.oral-search__meta--empty { color: #d70015; }

/* ── Coming-soon subject card ── */
.oral-subject-card.is-disabled {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}
.oral-subject-card.is-disabled::after {
  content: '준비 중';
  position: absolute;
  top: 10px; right: 12px;
  background: rgba(0,0,0,0.06);
  color: #86868b;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 9999px;
}

/* ============================================
   다크모드 오버라이드 (prefers-color-scheme: dark)
   ============================================ */
@media (prefers-color-scheme: dark) {
  /* ── Topbar 백 버튼 ── */
  :root:not([data-theme="light"]) .oral-topbar__back,
  :root:not([data-theme="light"]) .oral-study-topbar__back {
    background: #22252b;
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-topbar__back:hover,
  :root:not([data-theme="light"]) .oral-study-topbar__back:hover {
    background: #2a2d34;
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-topbar__title {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-study-topbar__info,
  :root:not([data-theme="light"]) .oral-study-topbar__count {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-study-topbar__count .c-known,
  :root:not([data-theme="light"]) .oral-study-topbar__count .c-unknown {
    color: #5FB2C9;
  }

  /* ── Bottom Sheet ── */
  :root:not([data-theme="light"]) .oral-sheet {
    background: #181a1e;
  }
  :root:not([data-theme="light"]) .oral-sheet__header {
    background: #181a1e;
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }
  :root:not([data-theme="light"]) .oral-sheet__title {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-sheet__close {
    background: #22252b;
    color: #e8e8ec;
  }
  :root:not([data-theme="light"]) .oral-sheet__close:hover {
    background: #2a2d34;
  }
  :root:not([data-theme="light"]) .oral-sheet__action-btn {
    background: #22252b;
    color: #e8e8ec;
  }
  :root:not([data-theme="light"]) .oral-sheet__action-btn:hover {
    background: #2a2d34;
  }
  :root:not([data-theme="light"]) .oral-sheet__action-btn--danger {
    background: rgba(255, 59, 48, 0.18);
    color: #ff6b5b;
  }
  :root:not([data-theme="light"]) .oral-sheet__action-btn--danger:hover {
    background: rgba(255, 59, 48, 0.28);
  }
  :root:not([data-theme="light"]) .oral-sheet__action-btn--active {
    background: #5FB2C9;
    color: #0f1012;
  }
  :root:not([data-theme="light"]) .oral-sheet__action-btn--active:hover {
    background: #7fc8de;
  }
  :root:not([data-theme="light"]) .oral-sheet__footer {
    background: #181a1e;
    border-top-color: rgba(255, 255, 255, 0.08);
  }
  :root:not([data-theme="light"]) .oral-sheet__footer #oral-sheet-selected-count {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-sheet__check {
    background: #22252b;
    border-color: rgba(255, 255, 255, 0.2);
  }
  :root:not([data-theme="light"]) .oral-sheet__item--selected .oral-sheet__check {
    background: #5FB2C9;
    border-color: #5FB2C9;
  }
  :root:not([data-theme="light"]) .oral-sheet__check svg {
    color: #0f1012;
  }
  :root:not([data-theme="light"]) .oral-sheet__item--selected .oral-sheet__item-header {
    background: rgba(95, 178, 201, 0.08);
  }
  :root:not([data-theme="light"]) .oral-sheet__item {
    border-bottom-color: rgba(255, 255, 255, 0.06);
  }
  :root:not([data-theme="light"]) .oral-sheet__item-header:active {
    background: rgba(255, 255, 255, 0.04);
  }
  :root:not([data-theme="light"]) .oral-sheet__item-arrow {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-sheet__item-cat {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-sheet__item-q {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-sheet__item-a {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-sheet__item-remove {
    background: #22252b;
    border-color: rgba(255, 255, 255, 0.16);
    color: #7fc8de;
  }
  :root:not([data-theme="light"]) .oral-sheet__item-remove:active {
    background: rgba(255, 59, 48, 0.15);
  }
  :root:not([data-theme="light"]) .oral-sheet__empty {
    color: #6e6e73;
  }

  /* ── Nav arrows ── */
  :root:not([data-theme="light"]) .oral-nav-arrow {
    background: rgba(255, 255, 255, 0.06);
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-nav-arrow:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-nav-arrow:active {
    background: rgba(255, 255, 255, 0.18);
  }

  /* ── Progress bar ── */
  :root:not([data-theme="light"]) .oral-study-progress {
    background: #22252b;
  }
  :root:not([data-theme="light"]) .oral-study-progress__fill {
    background: #5FB2C9;
  }

  /* ── Card ── */
  :root:not([data-theme="light"]) .oral-card {
    background: #1c1c1e;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  }
  :root:not([data-theme="light"]) .oral-card__cat {
    color: #7fc8de;
    background: rgba(95, 178, 201, 0.15);
  }
  :root:not([data-theme="light"]) .oral-card__q {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-card__case {
    background: #22252b;
    color: #d0d5dc;
  }
  :root:not([data-theme="light"]) .oral-card__hint {
    color: #6e6e73;
  }
  :root:not([data-theme="light"]) .oral-card__divider {
    background: rgba(255, 255, 255, 0.08);
  }
  :root:not([data-theme="light"]) .oral-card__a {
    color: #e8e8ec;
  }
  :root:not([data-theme="light"]) .oral-card__img {
    background: #22252b;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
  }
  :root:not([data-theme="light"]) .oral-card__bookmark {
    color: #4a4a4d;
  }
  :root:not([data-theme="light"]) .oral-card__bookmark:hover {
    color: #a1a1a6;
    background: rgba(255, 255, 255, 0.06);
  }

  /* ── Action 버튼 ── */
  :root:not([data-theme="light"]) .oral-btn--unknown {
    background: #2a2d34;
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-btn--unknown:hover {
    background: #3a3d44;
  }
  :root:not([data-theme="light"]) .oral-btn--known {
    background: #5FB2C9;
    color: #0f1012;
  }
  :root:not([data-theme="light"]) .oral-btn--known:hover {
    background: #7fc8de;
  }

  /* ── Category chips ── */
  :root:not([data-theme="light"]) .oral-catgroup__box {
    background: #181a1e;
  }
  :root:not([data-theme="light"]) .oral-catgroup__header:hover {
    background: rgba(255, 255, 255, 0.04);
  }
  :root:not([data-theme="light"]) .oral-catgroup__label {
    color: #7fc8de;
  }
  :root:not([data-theme="light"]) .oral-catgroup__count,
  :root:not([data-theme="light"]) .oral-catgroup__arrow,
  :root:not([data-theme="light"]) .oral-catgroup__toggle {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-catgroup__toggle:hover {
    color: #7fc8de;
  }
  :root:not([data-theme="light"]) .oral-mchip {
    color: #6e6e73;
    background: #22252b;
    border-color: rgba(255, 255, 255, 0.12);
  }
  :root:not([data-theme="light"]) .oral-mchip:hover {
    color: #e8e8ec;
    border-color: rgba(255, 255, 255, 0.2);
  }
  :root:not([data-theme="light"]) .oral-mchip--on {
    background: rgba(95, 178, 201, 0.18);
    color: #7fc8de;
    border-color: #5FB2C9;
    opacity: 1;
  }

  /* ── Help list ── */
  :root:not([data-theme="light"]) .oral-help-list dt {
    color: #7fc8de;
  }
  :root:not([data-theme="light"]) .oral-help-list dd {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-help-list strong {
    color: #f0f0f0;
  }

  /* ── Inline option chips ── */
  :root:not([data-theme="light"]) .oral-opt {
    color: #a1a1a6;
    background: #22252b;
  }
  :root:not([data-theme="light"]) .oral-opt:hover {
    color: #f0f0f0;
    background: #2a2d34;
  }
  :root:not([data-theme="light"]) .oral-opt--on {
    background: #5FB2C9;
    color: #0f1012;
    box-shadow: 0 1px 4px rgba(95, 178, 201, 0.3);
  }
  :root:not([data-theme="light"]) .oral-opt--lg {
    background: #22252b;
    color: #e8e8ec;
  }
  :root:not([data-theme="light"]) .oral-opt--lg:hover {
    background: #2a2d34;
    color: #ffffff;
  }
  :root:not([data-theme="light"]) .oral-opt--lg.oral-opt--on {
    background: #5FB2C9;
    color: #0f1012;
  }

  /* ── Timer 셀렉터 ── */
  :root:not([data-theme="light"]) .oral-opt-timer-sec {
    background: #1c1c1e;
    border-color: #5FB2C9;
    color: #7fc8de;
  }
  :root:not([data-theme="light"]) .oral-opt-timer-sec:hover {
    background: rgba(95, 178, 201, 0.08);
  }
  :root:not([data-theme="light"]) .oral-opt-timer-sec svg {
    color: #7fc8de;
  }

  /* ── Guide ── */
  :root:not([data-theme="light"]) .oral-guide-heading {
    color: #f0f0f0;
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }
  :root:not([data-theme="light"]) .oral-guide-card {
    background: #22252b;
  }
  :root:not([data-theme="light"]) .oral-guide-row span {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-guide-row strong {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-guide-item {
    border-bottom-color: rgba(255, 255, 255, 0.06);
  }
  :root:not([data-theme="light"]) .oral-guide-num {
    background: #5FB2C9;
    color: #0f1012;
  }
  :root:not([data-theme="light"]) .oral-guide-item strong {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-guide-item p {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-faq {
    border-bottom-color: rgba(255, 255, 255, 0.06);
  }
  :root:not([data-theme="light"]) .oral-faq summary {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-faq summary::after {
    color: #6e6e73;
  }
  :root:not([data-theme="light"]) .oral-faq p {
    color: #a1a1a6;
  }

  /* ── Search ── */
  :root:not([data-theme="light"]) .oral-search__box {
    background: #22252b;
  }
  :root:not([data-theme="light"]) .oral-search__box:focus-within {
    background: #181a1e;
    box-shadow: 0 0 0 2px #5FB2C9;
  }
  :root:not([data-theme="light"]) .oral-search__icon {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-search__box input {
    color: #f0f0f0;
  }
  :root:not([data-theme="light"]) .oral-search__box input::placeholder {
    color: #6e6e73;
  }
  :root:not([data-theme="light"]) .oral-search__clear {
    background: rgba(255, 255, 255, 0.2);
    color: #0f1012;
  }
  :root:not([data-theme="light"]) .oral-search__clear:hover {
    background: rgba(255, 255, 255, 0.32);
  }
  :root:not([data-theme="light"]) .oral-search__meta {
    color: #a1a1a6;
  }
  :root:not([data-theme="light"]) .oral-search__meta strong {
    color: #7fc8de;
  }
  :root:not([data-theme="light"]) .oral-search__meta--empty {
    color: #ff6b5b;
  }

  /* ── Coming-soon 배지 ── */
  :root:not([data-theme="light"]) .oral-subject-card.is-disabled::after {
    background: rgba(255, 255, 255, 0.08);
    color: #a1a1a6;
  }

  /* ── 학습 완료/타이머 인라인 라이트 무력화 (cft.html / si2.html 공통) ── */
  :root:not([data-theme="light"]) #oral-timer-bar {
    background: rgba(255, 255, 255, 0.08) !important;
  }
  :root:not([data-theme="light"]) #oral-timer-pause {
    background: rgba(255, 255, 255, 0.08) !important;
  }
  :root:not([data-theme="light"]) #oral-timer-pause svg {
    fill: #7fc8de !important;
  }
  :root:not([data-theme="light"]) #oral-complete > div:first-child {
    background: rgba(95, 178, 201, 0.18) !important;
  }
  :root:not([data-theme="light"]) #oral-complete > div:first-child svg {
    stroke: #7fc8de !important;
  }
  :root:not([data-theme="light"]) #oral-complete-title {
    color: #f0f0f0 !important;
  }
  :root:not([data-theme="light"]) #oral-complete-desc {
    color: #a1a1a6 !important;
  }
  :root:not([data-theme="light"]) #oral-btn-retry-bookmark {
    background: rgba(245, 158, 11, 0.16) !important;
    color: #fbbf24 !important;
  }
  :root:not([data-theme="light"]) #oral-btn-retry-all {
    background: #2c2c2e !important;
    color: #f0f0f0 !important;
  }
  :root:not([data-theme="light"]) #oral-btn-back-menu {
    color: #a1a1a6 !important;
  }
}

    /* === forced-dark mirror (auto: mirror-forced-dark.js) === */

  /* ── Topbar 백 버튼 ── */
  [data-theme="dark"] .oral-topbar__back,
  [data-theme="dark"] .oral-study-topbar__back {
    background: #22252b;
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-topbar__back:hover,
  [data-theme="dark"] .oral-study-topbar__back:hover {
    background: #2a2d34;
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-topbar__title {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-study-topbar__info,
  [data-theme="dark"] .oral-study-topbar__count {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-study-topbar__count .c-known,
  [data-theme="dark"] .oral-study-topbar__count .c-unknown {
    color: #5FB2C9;
  }

  /* ── Bottom Sheet ── */
  [data-theme="dark"] .oral-sheet {
    background: #181a1e;
  }
  [data-theme="dark"] .oral-sheet__header {
    background: #181a1e;
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }
  [data-theme="dark"] .oral-sheet__title {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-sheet__close {
    background: #22252b;
    color: #e8e8ec;
  }
  [data-theme="dark"] .oral-sheet__close:hover {
    background: #2a2d34;
  }
  [data-theme="dark"] .oral-sheet__action-btn {
    background: #22252b;
    color: #e8e8ec;
  }
  [data-theme="dark"] .oral-sheet__action-btn:hover {
    background: #2a2d34;
  }
  [data-theme="dark"] .oral-sheet__action-btn--danger {
    background: rgba(255, 59, 48, 0.18);
    color: #ff6b5b;
  }
  [data-theme="dark"] .oral-sheet__action-btn--danger:hover {
    background: rgba(255, 59, 48, 0.28);
  }
  [data-theme="dark"] .oral-sheet__action-btn--active {
    background: #5FB2C9;
    color: #0f1012;
  }
  [data-theme="dark"] .oral-sheet__action-btn--active:hover {
    background: #7fc8de;
  }
  [data-theme="dark"] .oral-sheet__footer {
    background: #181a1e;
    border-top-color: rgba(255, 255, 255, 0.08);
  }
  [data-theme="dark"] .oral-sheet__footer #oral-sheet-selected-count {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-sheet__check {
    background: #22252b;
    border-color: rgba(255, 255, 255, 0.2);
  }
  [data-theme="dark"] .oral-sheet__item--selected .oral-sheet__check {
    background: #5FB2C9;
    border-color: #5FB2C9;
  }
  [data-theme="dark"] .oral-sheet__check svg {
    color: #0f1012;
  }
  [data-theme="dark"] .oral-sheet__item--selected .oral-sheet__item-header {
    background: rgba(95, 178, 201, 0.08);
  }
  [data-theme="dark"] .oral-sheet__item {
    border-bottom-color: rgba(255, 255, 255, 0.06);
  }
  [data-theme="dark"] .oral-sheet__item-header:active {
    background: rgba(255, 255, 255, 0.04);
  }
  [data-theme="dark"] .oral-sheet__item-arrow {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-sheet__item-cat {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-sheet__item-q {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-sheet__item-a {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-sheet__item-remove {
    background: #22252b;
    border-color: rgba(255, 255, 255, 0.16);
    color: #7fc8de;
  }
  [data-theme="dark"] .oral-sheet__item-remove:active {
    background: rgba(255, 59, 48, 0.15);
  }
  [data-theme="dark"] .oral-sheet__empty {
    color: #6e6e73;
  }

  /* ── Nav arrows ── */
  [data-theme="dark"] .oral-nav-arrow {
    background: rgba(255, 255, 255, 0.06);
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-nav-arrow:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-nav-arrow:active {
    background: rgba(255, 255, 255, 0.18);
  }

  /* ── Progress bar ── */
  [data-theme="dark"] .oral-study-progress {
    background: #22252b;
  }
  [data-theme="dark"] .oral-study-progress__fill {
    background: #5FB2C9;
  }

  /* ── Card ── */
  [data-theme="dark"] .oral-card {
    background: #1c1c1e;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  }
  [data-theme="dark"] .oral-card__cat {
    color: #7fc8de;
    background: rgba(95, 178, 201, 0.15);
  }
  [data-theme="dark"] .oral-card__q {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-card__case {
    background: #22252b;
    color: #d0d5dc;
  }
  [data-theme="dark"] .oral-card__hint {
    color: #6e6e73;
  }
  [data-theme="dark"] .oral-card__divider {
    background: rgba(255, 255, 255, 0.08);
  }
  [data-theme="dark"] .oral-card__a {
    color: #e8e8ec;
  }
  [data-theme="dark"] .oral-card__img {
    background: #22252b;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
  }
  [data-theme="dark"] .oral-card__bookmark {
    color: #4a4a4d;
  }
  [data-theme="dark"] .oral-card__bookmark:hover {
    color: #a1a1a6;
    background: rgba(255, 255, 255, 0.06);
  }

  /* ── Action 버튼 ── */
  [data-theme="dark"] .oral-btn--unknown {
    background: #2a2d34;
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-btn--unknown:hover {
    background: #3a3d44;
  }
  [data-theme="dark"] .oral-btn--known {
    background: #5FB2C9;
    color: #0f1012;
  }
  [data-theme="dark"] .oral-btn--known:hover {
    background: #7fc8de;
  }

  /* ── Category chips ── */
  [data-theme="dark"] .oral-catgroup__box {
    background: #181a1e;
  }
  [data-theme="dark"] .oral-catgroup__header:hover {
    background: rgba(255, 255, 255, 0.04);
  }
  [data-theme="dark"] .oral-catgroup__label {
    color: #7fc8de;
  }
  [data-theme="dark"] .oral-catgroup__count,
  [data-theme="dark"] .oral-catgroup__arrow,
  [data-theme="dark"] .oral-catgroup__toggle {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-catgroup__toggle:hover {
    color: #7fc8de;
  }
  [data-theme="dark"] .oral-mchip {
    color: #6e6e73;
    background: #22252b;
    border-color: rgba(255, 255, 255, 0.12);
  }
  [data-theme="dark"] .oral-mchip:hover {
    color: #e8e8ec;
    border-color: rgba(255, 255, 255, 0.2);
  }
  [data-theme="dark"] .oral-mchip--on {
    background: rgba(95, 178, 201, 0.18);
    color: #7fc8de;
    border-color: #5FB2C9;
    opacity: 1;
  }

  /* ── Help list ── */
  [data-theme="dark"] .oral-help-list dt {
    color: #7fc8de;
  }
  [data-theme="dark"] .oral-help-list dd {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-help-list strong {
    color: #f0f0f0;
  }

  /* ── Inline option chips ── */
  [data-theme="dark"] .oral-opt {
    color: #a1a1a6;
    background: #22252b;
  }
  [data-theme="dark"] .oral-opt:hover {
    color: #f0f0f0;
    background: #2a2d34;
  }
  [data-theme="dark"] .oral-opt--on {
    background: #5FB2C9;
    color: #0f1012;
    box-shadow: 0 1px 4px rgba(95, 178, 201, 0.3);
  }
  [data-theme="dark"] .oral-opt--lg {
    background: #22252b;
    color: #e8e8ec;
  }
  [data-theme="dark"] .oral-opt--lg:hover {
    background: #2a2d34;
    color: #ffffff;
  }
  [data-theme="dark"] .oral-opt--lg.oral-opt--on {
    background: #5FB2C9;
    color: #0f1012;
  }

  /* ── Timer 셀렉터 ── */
  [data-theme="dark"] .oral-opt-timer-sec {
    background: #1c1c1e;
    border-color: #5FB2C9;
    color: #7fc8de;
  }
  [data-theme="dark"] .oral-opt-timer-sec:hover {
    background: rgba(95, 178, 201, 0.08);
  }
  [data-theme="dark"] .oral-opt-timer-sec svg {
    color: #7fc8de;
  }

  /* ── Guide ── */
  [data-theme="dark"] .oral-guide-heading {
    color: #f0f0f0;
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }
  [data-theme="dark"] .oral-guide-card {
    background: #22252b;
  }
  [data-theme="dark"] .oral-guide-row span {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-guide-row strong {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-guide-item {
    border-bottom-color: rgba(255, 255, 255, 0.06);
  }
  [data-theme="dark"] .oral-guide-num {
    background: #5FB2C9;
    color: #0f1012;
  }
  [data-theme="dark"] .oral-guide-item strong {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-guide-item p {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-faq {
    border-bottom-color: rgba(255, 255, 255, 0.06);
  }
  [data-theme="dark"] .oral-faq summary {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-faq summary::after {
    color: #6e6e73;
  }
  [data-theme="dark"] .oral-faq p {
    color: #a1a1a6;
  }

  /* ── Search ── */
  [data-theme="dark"] .oral-search__box {
    background: #22252b;
  }
  [data-theme="dark"] .oral-search__box:focus-within {
    background: #181a1e;
    box-shadow: 0 0 0 2px #5FB2C9;
  }
  [data-theme="dark"] .oral-search__icon {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-search__box input {
    color: #f0f0f0;
  }
  [data-theme="dark"] .oral-search__box input::placeholder {
    color: #6e6e73;
  }
  [data-theme="dark"] .oral-search__clear {
    background: rgba(255, 255, 255, 0.2);
    color: #0f1012;
  }
  [data-theme="dark"] .oral-search__clear:hover {
    background: rgba(255, 255, 255, 0.32);
  }
  [data-theme="dark"] .oral-search__meta {
    color: #a1a1a6;
  }
  [data-theme="dark"] .oral-search__meta strong {
    color: #7fc8de;
  }
  [data-theme="dark"] .oral-search__meta--empty {
    color: #ff6b5b;
  }

  /* ── Coming-soon 배지 ── */
  [data-theme="dark"] .oral-subject-card.is-disabled::after {
    background: rgba(255, 255, 255, 0.08);
    color: #a1a1a6;
  }

  /* ── 학습 완료/타이머 인라인 라이트 무력화 (cft.html / si2.html 공통) ── */
  [data-theme="dark"] #oral-timer-bar {
    background: rgba(255, 255, 255, 0.08) !important;
  }
  [data-theme="dark"] #oral-timer-pause {
    background: rgba(255, 255, 255, 0.08) !important;
  }
  [data-theme="dark"] #oral-timer-pause svg {
    fill: #7fc8de !important;
  }
  [data-theme="dark"] #oral-complete > div:first-child {
    background: rgba(95, 178, 201, 0.18) !important;
  }
  [data-theme="dark"] #oral-complete > div:first-child svg {
    stroke: #7fc8de !important;
  }
  [data-theme="dark"] #oral-complete-title {
    color: #f0f0f0 !important;
  }
  [data-theme="dark"] #oral-complete-desc {
    color: #a1a1a6 !important;
  }
  [data-theme="dark"] #oral-btn-retry-bookmark {
    background: rgba(245, 158, 11, 0.16) !important;
    color: #fbbf24 !important;
  }
  [data-theme="dark"] #oral-btn-retry-all {
    background: #2c2c2e !important;
    color: #f0f0f0 !important;
  }
  [data-theme="dark"] #oral-btn-back-menu {
    color: #a1a1a6 !important;
  }