/* ============================================
   📚 AI Vocab Styles
   ============================================ */

.vc-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem 6rem;
  position: relative;
  z-index: 1;
}
.vc-section { display: block; }

.vc-header { text-align: center; margin-bottom: 2.5rem; }
.vc-header h1 { font-size: 2.2rem; font-weight: 900; margin: 1rem 0; line-height: 1.3; }
.vc-sub { color: var(--text-dim); line-height: 1.8; }

/* === 統計 === */
.vc-stats {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 1.25rem;
  margin-bottom: 2rem;
}
.vc-stat-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}
.vc-stat-cell { text-align: center; }
.vc-stat-num {
  font-size: 1.9rem;
  font-weight: 900;
  background: linear-gradient(135deg, #818cf8, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.vc-stat-label { font-size: 0.78rem; color: var(--text-dim); }

/* === レベル選択 === */
.vc-level-picker { margin-bottom: 2rem; }
.vc-level-picker h3 { font-size: 1rem; margin-bottom: 0.85rem; color: var(--text-dim); font-weight: 600; }
.vc-level-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.vc-level-btn {
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  transition: all 0.18s;
}
.vc-level-btn:hover {
  background: rgba(99,102,241,0.1);
  border-color: rgba(99,102,241,0.35);
}
.vc-level-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-color: transparent;
  font-weight: 700;
}

.vc-univ-btn {
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  transition: all 0.18s;
}
.vc-univ-btn:hover { background: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.4); }
.vc-univ-btn.active {
  background: linear-gradient(135deg, #f59e0b, #ec4899);
  border-color: transparent;
  font-weight: 700;
}

.vc-voice-toggle {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--text);
  cursor: pointer;
}
.vc-voice-toggle input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.vc-speak-btn {
  background: rgba(99,102,241,0.18);
  border: 1px solid rgba(99,102,241,0.4);
  color: var(--primary-light);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s;
  margin: 1rem 0;
}
.vc-speak-btn:hover {
  background: rgba(99,102,241,0.3);
  transform: scale(1.05);
}
.vc-speak-btn.vc-speak-example {
  width: 36px;
  height: 36px;
  font-size: 0.95rem;
  margin: 0 0 0 0.5rem;
  flex-shrink: 0;
}
.vc-card-example-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(99,102,241,0.08);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.5rem;
}
.vc-card-example-row .vc-card-example {
  flex: 1;
  background: none;
  padding: 0;
  margin-bottom: 0;
}

.vc-actions { text-align: center; margin-top: 2rem; }

/* === Review Card === */
.vc-review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.vc-card-wrap { perspective: 1200px; margin-bottom: 1.5rem; }
.vc-card {
  background: var(--panel);
  border: 2px solid var(--panel-border);
  border-radius: 18px;
  padding: 3.5rem 2rem;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.vc-card-pos {
  font-size: 0.78rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.vc-card-word {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff, #c7d2fe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.vc-show-btn {
  padding: 0.85rem 2rem;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--panel-border);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  transition: all 0.2s;
}
.vc-show-btn:hover {
  background: rgba(99,102,241,0.18);
}

.vc-card-back {
  width: 100%;
}
.vc-card-meaning {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--text);
}
.vc-card-example {
  font-size: 1rem;
  color: var(--primary-light);
  font-style: italic;
  margin-bottom: 0.5rem;
  padding: 0.85rem 1rem;
  background: rgba(99,102,241,0.08);
  border-radius: 8px;
}
.vc-card-example-jp {
  font-size: 0.92rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.vc-grade-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}
.vc-grade-btn {
  padding: 1.1rem;
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}
.vc-grade-no {
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.4);
  color: #fca5a5;
}
.vc-grade-no:hover { background: rgba(239,68,68,0.25); }
.vc-grade-yes {
  background: rgba(16,185,129,0.15);
  border: 1px solid rgba(16,185,129,0.4);
  color: #6ee7b7;
}
.vc-grade-yes:hover { background: rgba(16,185,129,0.25); }

.vc-progress-info {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === 完了画面 === */
.vc-complete-emoji { font-size: 4rem; text-align: center; margin-bottom: 1rem; }
#vcComplete { text-align: center; }
#vcComplete h2 { font-size: 2rem; margin-bottom: 1rem; }
#vcComplete p { color: var(--text-dim); margin: 0.5rem 0; }
#vcComplete strong { color: var(--primary-light); font-size: 1.3em; }
.vc-complete-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .vc-stat-row { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .vc-card-word { font-size: 2.5rem; }
  .vc-grade-buttons { grid-template-columns: 1fr; }
  .vc-complete-actions { flex-direction: column; }
}

/* ==========================================================================
   📖 4 択クイズ UI (塾長指示 2026-05-03)
   ========================================================================== */
.vc-quiz-card {
  text-align: center;
  padding: 1.5rem;
}
.vc-quiz-tags {
  display: flex;
  gap: 0.4rem;
  justify-content: center;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}
.vc-pos-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.7rem;
  background: rgba(99,102,241,0.18);
  border: 1px solid rgba(99,102,241,0.4);
  color: #a78bfa;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.vc-vt-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.vc-vt-badge[data-kind="vt"]    { background: rgba(239,68,68,0.18);  border:1px solid rgba(239,68,68,0.4);  color:#fca5a5; }
.vc-vt-badge[data-kind="vi"]    { background: rgba(56,189,248,0.18); border:1px solid rgba(56,189,248,0.4); color:#7dd3fc; }
.vc-vt-badge[data-kind="vt+vi"] { background: rgba(251,191,36,0.18); border:1px solid rgba(251,191,36,0.4); color:#fcd34d; }

.vc-quiz-prompt {
  margin: 1.2rem 0 0.6rem;
  color: var(--text-dim, #94a3b8);
  font-size: 0.85rem;
}

.vc-choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
  margin: 0.6rem 0;
}
.vc-choice {
  padding: 0.95rem 1rem;
  background: rgba(255,255,255,0.04);
  border: 1.5px solid rgba(255,255,255,0.12);
  color: #e4e4e7;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, border 0.15s, transform 0.05s;
  line-height: 1.45;
  min-height: 60px;
}
.vc-choice:hover:not(.disabled) {
  background: rgba(99,102,241,0.15);
  border-color: rgba(99,102,241,0.5);
}
.vc-choice:active:not(.disabled) { transform: scale(0.98); }
.vc-choice.correct {
  background: rgba(16,185,129,0.22);
  border-color: rgba(16,185,129,0.6);
  color: #6ee7b7;
}
.vc-choice.wrong {
  background: rgba(239,68,68,0.22);
  border-color: rgba(239,68,68,0.6);
  color: #fca5a5;
}
.vc-choice.disabled { cursor: not-allowed; }

.vc-quiz-feedback {
  margin-top: 1.2rem;
  padding: 1rem;
  background: rgba(0,0,0,0.25);
  border-radius: 10px;
  text-align: left;
}
.vc-feedback-status { font-size: 1.05rem; margin-bottom: 0.6rem; }

@media (max-width: 640px) {
  .vc-choices { grid-template-columns: 1fr; }
  .vc-choice { font-size: 1rem; }
}

/* level picker サブカテゴリ見出し */
.vc-level-sub {
  margin-top: 0.7rem;
  margin-bottom: 0.3rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 0.06em;
}

/* ============================================================
   🔴 間違えた単語タグ panel (塾長指示 2026-05-25 / 生徒要望)
   ============================================================ */
.vc-stat-num.vc-stat-mistakes { color: #ef4444; }

.vc-mistakes-panel {
  margin: 1.25rem 0 2rem;
  padding: 1.1rem 1.25rem;
  background: linear-gradient(135deg, rgba(239,68,68,0.10), rgba(239,68,68,0.04));
  border: 1px solid rgba(239,68,68,0.35);
  border-radius: 12px;
}
.vc-mistakes-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}
.vc-mistakes-title {
  font-weight: 800;
  color: #fecaca;
  font-size: 1rem;
}
.vc-mistakes-sub {
  font-size: 0.78rem;
  color: #94a3b8;
  margin-top: 0.2rem;
  line-height: 1.5;
}
.vc-mistakes-count-big {
  font-weight: 900;
  font-size: 1.4rem;
  color: #ef4444;
  white-space: nowrap;
}
.vc-mistakes-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.btn-mistake {
  background: linear-gradient(135deg, #ef4444, #dc2626) !important;
  border: none !important;
  color: white !important;
  font-weight: 800;
}
.btn-mistake:hover { filter: brightness(1.08); }

.vc-mistakes-list {
  margin-top: 1rem;
  max-height: 380px;
  overflow-y: auto;
  background: rgba(15,23,42,0.45);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
}
.vc-mistakes-list-inner { padding: 0.5rem; }
.vc-mistakes-list-loading,
.vc-mistakes-list-empty {
  padding: 1.5rem;
  text-align: center;
  color: #94a3b8;
  font-size: 0.88rem;
}
.vc-mistake-row {
  display: grid;
  grid-template-columns: minmax(140px, 1.2fr) 1.6fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.6rem 0.7rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.vc-mistake-row:last-child { border-bottom: none; }
.vc-mistake-word { font-weight: 800; color: #f8fafc; }
.vc-mistake-meta {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.2rem;
  font-size: 0.7rem;
}
.vc-mistake-pos {
  background: rgba(99,102,241,0.18);
  border: 1px solid rgba(99,102,241,0.35);
  color: #c7d2fe;
  padding: 0.05rem 0.4rem;
  border-radius: 4px;
}
.vc-mistake-level {
  color: #94a3b8;
  padding: 0.05rem 0.3rem;
}
.vc-mistake-meaning {
  color: #cbd5e1;
  font-size: 0.92rem;
  line-height: 1.45;
}
.vc-mistake-stats {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: flex-end;
  font-size: 0.72rem;
  white-space: nowrap;
}
.vc-mistake-count-badge {
  background: rgba(239,68,68,0.18);
  border: 1px solid rgba(239,68,68,0.4);
  color: #fecaca;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-weight: 700;
}
.vc-mistake-acc { color: #94a3b8; }

@media (max-width: 640px) {
  .vc-mistake-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .vc-mistake-stats {
    flex-direction: row;
    align-items: center;
    gap: 0.6rem;
  }
  .vc-mistakes-header { flex-direction: column; align-items: flex-start; }
}