/* ==========================================================================
   PHONICS-EN.CSS — Giao diện Ngữ âm IPA tiếng Anh chuẩn Hoàng Gia
   Chủ đề: Navy #14213D, Vàng đồng #B08D57, Nền kem sang trọng #FBF8F1
   ========================================================================== */

.phonics-en-wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  font-family: inherit;
}

/* Header */
.phonics-en-header {
  margin-bottom: 2rem;
  text-align: center;
}

.phonics-badge-royal {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: 9999px;
  background: rgba(176, 141, 87, 0.15);
  color: #B08D57;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  border: 1px solid rgba(176, 141, 87, 0.3);
}

.phonics-main-title {
  font-family: var(--font-display, "Playfair Display", Georgia, serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--accent, #14213D);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.phonics-main-desc {
  max-width: 680px;
  margin: 0 auto;
  color: var(--text-muted, #4B5563);
  font-size: 1rem;
  line-height: 1.6;
}

/* Subtabs Nav */
.phonics-nav-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 2px solid rgba(20, 33, 61, 0.1);
  margin-bottom: 2rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
  scrollbar-width: none;
}
.phonics-nav-tabs::-webkit-scrollbar {
  display: none;
}

.phonics-tab-btn {
  padding: 0.75rem 1.25rem;
  border: none;
  background: transparent;
  color: var(--text-muted, #4B5563);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.phonics-tab-btn:hover {
  color: var(--accent, #14213D);
}

.phonics-tab-btn.active {
  color: var(--accent, #14213D);
  border-bottom-color: var(--accent-2, #B08D57);
}

/* Filter Bar */
.phonics-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted, #4B5563);
}

.filter-chips {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-chip {
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  border: 1px solid rgba(20, 33, 61, 0.15);
  background: var(--surface, #FFFFFF);
  color: var(--text, #1F2937);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-chip:hover {
  border-color: var(--accent-2, #B08D57);
}

.filter-chip.active {
  background: var(--accent, #14213D);
  color: #FFFFFF;
  border-color: var(--accent, #14213D);
}

/* 44 Sounds Grid */
.phonics-sounds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1rem;
}

.phonics-sound-card {
  background: var(--surface, #FFFFFF);
  border: 1px solid rgba(20, 33, 61, 0.12);
  border-radius: 12px;
  padding: 1rem;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

.phonics-sound-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-2, #B08D57);
  box-shadow: 0 8px 20px rgba(20, 33, 61, 0.1);
}

.sound-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.sound-group-pill {
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: rgba(176, 141, 87, 0.12);
  color: #B08D57;
  font-weight: 600;
  text-transform: uppercase;
}

.sound-audio-mini-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  padding: 0.2rem;
  opacity: 0.8;
  transition: transform 0.15s;
}

.sound-audio-mini-btn:hover {
  transform: scale(1.2);
  opacity: 1;
}

.sound-ipa-display {
  font-family: var(--font-display, "Playfair Display", Georgia, serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--accent, #14213D);
  margin: 0.25rem 0;
}

.sound-name-display {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text, #1F2937);
  margin-bottom: 0.5rem;
}

.sound-samples-preview {
  font-size: 0.8rem;
  color: var(--text-muted, #4B5563);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.sound-card-action {
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px dashed rgba(20, 33, 61, 0.08);
}

.action-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-2, #B08D57);
}

/* Modal Chi Tiết Âm */
.phonics-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 20, 31, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.phonics-modal-card {
  background: var(--surface, #FFFFFF);
  border-radius: 16px;
  max-width: 620px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(176, 141, 87, 0.3);
  padding: 1.75rem;
  position: relative;
  animation: modalFadeIn 0.25s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.phonics-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--text-muted, #4B5563);
  padding: 0.5rem;
  border-radius: 50%;
  transition: all 0.2s;
}

.phonics-modal-close:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text, #1F2937);
}

.modal-sound-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(20, 33, 61, 0.1);
  flex-wrap: wrap;
}

.modal-ipa-badge {
  font-family: var(--font-display, "Playfair Display", Georgia, serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent, #14213D);
  background: rgba(20, 33, 61, 0.06);
  padding: 0.25rem 1rem;
  border-radius: 10px;
  border: 1px solid rgba(20, 33, 61, 0.15);
}

.modal-title-box {
  flex: 1;
}

.modal-sound-title {
  margin: 0;
  font-size: 1.35rem;
  color: var(--text, #1F2937);
}

.modal-sound-subgroup {
  font-size: 0.85rem;
  color: #B08D57;
  font-weight: 600;
  text-transform: uppercase;
}

.modal-sound-listen-btn {
  background: var(--accent-2, #B08D57);
  color: #FFFFFF;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.modal-sound-listen-btn:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.modal-content-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal-info-block {
  background: var(--surface-2, #F4EFE6);
  padding: 1rem;
  border-radius: 10px;
  border-left: 4px solid var(--accent, #14213D);
}

.modal-info-block.block-mouth { border-left-color: #3B82F6; }
.modal-info-block.block-compare { border-left-color: #10B981; }
.modal-info-block.block-errors { border-left-color: #F59E0B; }
.modal-info-block.block-examples { border-left-color: var(--accent-2, #B08D57); }

.block-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text, #1F2937);
  margin: 0 0 0.4rem;
}

.block-text {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text, #1F2937);
  margin: 0;
}

.modal-examples-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.modal-example-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface, #FFFFFF);
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.2s;
}

.modal-example-row:hover {
  border-color: var(--accent-2, #B08D57);
  background: rgba(176, 141, 87, 0.05);
}

.ex-audio-btn {
  background: none;
  border: none;
  font-size: 1rem;
  cursor: pointer;
}

.ex-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.ex-word {
  font-weight: 700;
  color: var(--accent, #14213D);
  font-size: 1.05rem;
}

.ex-ipa {
  color: var(--text-muted, #4B5563);
  font-family: monospace;
}

.ex-vi {
  color: var(--text, #1F2937);
  font-size: 0.9rem;
}

.modal-actions-footer {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
}

/* Subtab 2: Minimal Pairs Game */
.pairs-game-card {
  background: var(--surface, #FFFFFF);
  border-radius: 16px;
  border: 1px solid rgba(20, 33, 61, 0.12);
  padding: 2rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.pairs-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.pairs-pair-badge {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent, #14213D);
  background: rgba(20, 33, 61, 0.08);
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
}

.pairs-score-chip {
  font-size: 0.9rem;
  color: var(--text-muted, #4B5563);
}

.pairs-game-title {
  font-size: 1.4rem;
  color: var(--text, #1F2937);
  margin: 0 0 0.5rem;
}

.pairs-game-hint {
  font-size: 0.95rem;
  color: var(--text-muted, #4B5563);
  margin: 0 0 1.5rem;
}

.pairs-audio-area {
  margin-bottom: 2rem;
}

.pairs-play-audio-btn {
  background: var(--accent, #14213D);
  color: #FFFFFF;
  border: none;
  padding: 1rem 2rem;
  border-radius: 12px;
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(20, 33, 61, 0.2);
}

.pairs-play-audio-btn:hover {
  background: #0B1320;
  transform: translateY(-2px);
}

.pairs-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.pair-choice-btn {
  background: var(--surface-2, #F4EFE6);
  border: 2px solid transparent;
  border-radius: 12px;
  padding: 1.25rem 1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s;
}

.pair-choice-btn:hover:not(:disabled) {
  border-color: var(--accent-2, #B08D57);
  background: #FFFFFF;
  transform: translateY(-2px);
}

.pair-choice-btn.correct {
  background: #ECFDF5;
  border-color: #10B981;
}

.pair-choice-btn.wrong {
  background: #FEF2F2;
  border-color: #EF4444;
}

.choice-sound {
  font-size: 0.85rem;
  font-weight: 700;
  color: #B08D57;
}

.choice-word {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent, #14213D);
}

.choice-ipa {
  font-size: 0.9rem;
  color: var(--text-muted, #4B5563);
  font-family: monospace;
}

.choice-vi {
  font-size: 0.85rem;
  color: var(--text, #1F2937);
}

.pair-feedback-box {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.pair-tip-box {
  background: rgba(176, 141, 87, 0.1);
  padding: 0.85rem;
  border-radius: 8px;
  color: var(--text, #1F2937);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  text-align: left;
}

.btn-next-pair {
  width: 100%;
}

/* Subtabs 3 & 4: Rules Cards */
.phonics-section-rules {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.rules-card-box {
  background: var(--surface, #FFFFFF);
  border-radius: 14px;
  border: 1px solid rgba(20, 33, 61, 0.12);
  padding: 1.75rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.rules-box-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.rules-badge {
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(176, 141, 87, 0.15);
  color: #B08D57;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.rules-box-header h2 {
  font-size: 1.35rem;
  color: var(--accent, #14213D);
  margin: 0;
}

.rules-box-intro {
  font-size: 0.95rem;
  color: var(--text-muted, #4B5563);
  margin: 0 0 1.25rem;
  line-height: 1.6;
}

.rules-list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.rule-detail-card {
  background: var(--surface-2, #F4EFE6);
  border-radius: 10px;
  padding: 1.15rem;
  border-top: 3px solid var(--accent, #14213D);
}

.rule-ipa-head {
  font-size: 1.15rem;
  color: var(--accent, #14213D);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.rule-condition {
  font-size: 0.88rem;
  color: var(--text, #1F2937);
  margin-bottom: 0.5rem;
  line-height: 1.45;
}

.rule-mnemonic {
  font-size: 0.82rem;
  color: #B08D57;
  margin-bottom: 0.75rem;
}

.rule-words-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.rule-word-chip {
  background: var(--surface, #FFFFFF);
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.15s;
}

.rule-word-chip:hover {
  border-color: var(--accent-2, #B08D57);
  background: rgba(176, 141, 87, 0.08);
  transform: translateY(-1px);
}

.phrase-chip {
  font-size: 0.88rem;
  padding: 0.4rem 0.75rem;
}

/* Responsive */
@media (max-width: 640px) {
  .phonics-main-title {
    font-size: 1.75rem;
  }
  .phonics-sounds-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }
  .phonics-sound-card {
    padding: 0.75rem;
  }
  .pairs-options-grid {
    grid-template-columns: 1fr;
  }
  .rules-list-grid {
    grid-template-columns: 1fr;
  }
}