/* ===========================================================================
   CantoBuddy Styles  —  Mobile-first, responsive, large tap targets
   =========================================================================== */

/* ---- Design tokens ---- */
:root {
  --c-primary:       #e63946;
  --c-primary-dark:  #c1121f;
  --c-primary-light: #f8d7da;
  --c-secondary:     #2a9d8f;
  --c-accent:        #f4a261;
  --c-bg:            #f7f8fa;
  --c-surface:       #ffffff;
  --c-text:          #1a1a2e;
  --c-text-soft:     #6c757d;
  --c-border:        #e0e0e6;
  --c-correct:       #52b788;
  --c-wrong:         #e63946;
  --c-shadow:        rgba(0,0,0,0.06);
  --c-shadow-lg:     rgba(0,0,0,0.12);
  --radius:          14px;
  --radius-sm:       8px;
  --radius-lg:       20px;
  --tap:             48px;
  --font-cn:         'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w:           640px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; font-size: 16px; }

body {
  font-family: var(--font-en);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.5;
  padding-bottom: 72px; /* space for bottom nav */
  min-height: 100vh;
}

/* ---- Header ---- */
.app-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px var(--c-shadow);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}

.logo-emoji { font-size: 1.5rem; }

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-primary);
}

.logo-sub {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text-soft);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.learner-badge {
  background: var(--c-primary-light);
  color: var(--c-primary-dark);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.learner-badge:hover { opacity: 0.85; }

/* ---- Voice picker button (header) ---- */
.voice-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--c-border);
  background: var(--c-surface);
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, transform 0.1s;
  flex-shrink: 0;
}

.voice-btn:hover { border-color: var(--c-primary); }
.voice-btn:active { transform: scale(0.92); }

/* ---- Language toggle (header) ---- */
.lang-btn {
  height: 38px;
  min-width: 42px;
  padding: 0 9px;
  border-radius: 19px;
  border: 2px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-primary);
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  flex-shrink: 0;
}

.lang-btn:hover {
  border-color: var(--c-primary);
  background: var(--c-primary-light);
}

.lang-btn:active { transform: scale(0.92); }

.admin-link {
  color: var(--c-text-soft);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}

.admin-link:hover { background: var(--c-bg); }

/* ---- Main ---- */
.app-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px;
}

/* ---- Views ---- */
.view { display: none; animation: fadeIn 0.25s ease; }
.view.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Hero ---- */
.hero {
  text-align: center;
  padding: 24px 16px 8px;
}

.hero-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.3;
}

.hero-sub {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-primary);
  margin-top: 4px;
}

.hero-desc {
  font-size: 0.9rem;
  color: var(--c-text-soft);
  margin-top: 10px;
  max-width: 400px;
  margin-inline: auto;
}

/* ---- Level cards ---- */
.level-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.level-card {
  background: var(--c-surface);
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.1s;
  text-align: center;
}

.level-card:hover {
  border-color: var(--c-primary);
  box-shadow: 0 4px 16px var(--c-shadow-lg);
}

.level-card:active { transform: scale(0.98); }

.level-icon { font-size: 2rem; margin-bottom: 6px; }

.level-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.level-card p {
  font-size: 0.85rem;
  color: var(--c-text-soft);
}

.level-count {
  display: inline-block;
  margin-top: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-primary);
  background: var(--c-primary-light);
  padding: 3px 10px;
  border-radius: 12px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-en);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s;
  min-height: var(--tap);
  padding: 10px 18px;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--c-primary);
  color: #fff;
}

.btn-primary:hover { background: var(--c-primary-dark); }

.btn-outline {
  background: transparent;
  color: var(--c-text);
  border: 2px solid var(--c-border);
}

.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }

.btn-lg { font-size: 1.05rem; padding: 14px 24px; min-height: 52px; }
.btn-sm { font-size: 0.8rem; padding: 6px 12px; min-height: 36px; }
.btn-block { width: 100%; }

.home-quick {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.home-quick .btn { flex: 1; }

/* ---- Home categories strip ---- */
.home-categories {
  margin-top: 24px;
}

.home-categories h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-text-soft);
  margin-bottom: 10px;
}

/* All categories shown at once — a grid, no horizontal scrolling */
.cat-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.cat-pill {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text);
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  min-height: 46px;
  text-align: left;
  line-height: 1.2;
}

.cat-pill:hover {
  border-color: var(--c-primary);
  background: var(--c-primary-light);
}

.cat-pill:active { transform: scale(0.98); }

.cat-pill-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1;
}

.cat-pill-name {
  flex: 1;
  min-width: 0;
}

/* ---- Browse header ---- */
.browse-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.browse-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
}

.btn-back {
  background: none;
  border: none;
  color: var(--c-primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 4px;
  min-height: var(--tap);
}

/* ---- Filters ---- */
.filters {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 16px;
  border: 1px solid var(--c-border);
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.filter-row:last-child { margin-bottom: 0; }

.filter-row label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-text-soft);
  min-width: 60px;
}

.chip-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chip {
  padding: 6px 14px;
  border: 1.5px solid var(--c-border);
  border-radius: 20px;
  background: var(--c-surface);
  color: var(--c-text-soft);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}

.chip.active {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}

/* ---- Vocab list ---- */
.vocab-list {
  display: grid;
  gap: 12px;
}

.vocab-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.vocab-card:hover {
  box-shadow: 0 4px 12px var(--c-shadow-lg);
  border-color: var(--c-primary);
}

.vocab-card:active { transform: scale(0.99); }

.vocab-emoji {
  font-size: 2rem;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-bg);
  border-radius: var(--radius-sm);
}

.vocab-body { flex: 1; min-width: 0; }

.vocab-cantonese {
  font-family: var(--font-cn);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.3;
}

.vocab-jyutping {
  font-size: 0.82rem;
  color: var(--c-primary);
  font-weight: 500;
  margin-top: 2px;
}

.vocab-english {
  font-size: 0.9rem;
  color: var(--c-text-soft);
  margin-top: 4px;
}

.vocab-tagalog {
  font-size: 0.8rem;
  color: var(--c-secondary);
  font-style: italic;
  margin-top: 2px;
}

.vocab-audio-btn {
  flex-shrink: 0;
  width: var(--tap);
  height: var(--tap);
  border-radius: 50%;
  border: none;
  background: var(--c-primary);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
}

.vocab-audio-btn:hover { background: var(--c-primary-dark); }
.vocab-audio-btn:active { transform: scale(0.92); }
.vocab-audio-btn.playing { animation: pulse 0.6s infinite; }

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.1); }
}

/* ---- Vocab modal (detailed card) ---- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.modal-overlay.show { display: flex; animation: fadeIn 0.2s; }

.modal-card {
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

.modal-emoji { font-size: 4rem; margin-bottom: 12px; }

.modal-cantonese {
  font-family: var(--font-cn);
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-text);
}

.modal-jyutping {
  font-size: 1rem;
  color: var(--c-primary);
  font-weight: 600;
  margin-top: 6px;
}

.modal-english {
  font-size: 1.1rem;
  margin-top: 12px;
  font-weight: 500;
}

.modal-tagalog {
  font-size: 0.95rem;
  color: var(--c-secondary);
  font-style: italic;
  margin-top: 4px;
}

.modal-audio-btn {
  margin-top: 18px;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: none;
  background: var(--c-primary);
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
}

.modal-audio-btn:active { transform: scale(0.92); }
.modal-audio-btn.playing { animation: pulse 0.6s infinite; }

.modal-close {
  margin-top: 20px;
  background: none;
  border: none;
  color: var(--c-text-soft);
  font-size: 0.9rem;
  cursor: pointer;
}

/* ---- Share button (vocab modal) ---- */
.modal-share-btn {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 12px 16px;
  min-height: var(--tap);
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  color: var(--c-text);
  font-family: var(--font-en);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}

.modal-share-btn:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.modal-share-btn:active { transform: scale(0.98); }

/* ---- Toast (share / copy confirmation) ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 88px;
  transform: translate(-50%, 16px);
  background: rgba(26, 26, 46, 0.94);
  color: #fff;
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: 24px;
  max-width: 90vw;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 300;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---- Name modal ---- */
.modal-box {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 340px;
  width: 100%;
  animation: slideUp 0.25s ease;
}

.modal-box h3 { font-size: 1.2rem; margin-bottom: 6px; }
.modal-hint { font-size: 0.85rem; color: var(--c-text-soft); margin-bottom: 14px; }

#name-input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-en);
  margin-bottom: 16px;
}

#name-input:focus { border-color: var(--c-primary); outline: none; }

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* ---- Voice picker modal ---- */
.voice-box {
  max-width: 400px;
  max-height: 88vh;
  overflow-y: auto;
}

.voice-list {
  display: grid;
  gap: 10px;
  margin-bottom: 14px;
}

/* 2 x 2 grid of man/woman voice tiles */
.voice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

.voice-tile {
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  padding: 16px 10px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}

.voice-tile:hover { border-color: var(--c-primary); }
.voice-tile:active { transform: scale(0.97); }

.voice-tile.selected {
  border-color: var(--c-primary);
  background: var(--c-primary-light);
}

.voice-tile-icon {
  font-size: 2.2rem;
  line-height: 1.2;
  margin-bottom: 6px;
}

.voice-tile-gender {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-text);
}

.voice-tile-speed {
  font-size: 0.78rem;
  color: var(--c-text-soft);
  margin-top: 2px;
}

.voice-tile-tag {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--c-secondary);
  background: #e0f2f1;
  border-radius: 8px;
  padding: 1px 6px;
  margin-top: 5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ---- "All voices on this device" list ---- */
.voice-all-wrap { margin-bottom: 14px; }

.voice-all-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-text-soft);
  margin-bottom: 8px;
}

.voice-all {
  display: grid;
  gap: 6px;
  max-height: 210px;
  overflow-y: auto;
}

.voice-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 11px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.voice-row:hover { border-color: var(--c-primary); }

.voice-row.selected {
  border-color: var(--c-primary);
  background: var(--c-primary-light);
}

.voice-row-info { min-width: 0; }

.voice-row-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-text);
  word-break: break-word;
}

.voice-row-lang {
  font-size: 0.72rem;
  color: var(--c-text-soft);
  margin-top: 1px;
}

.voice-row-badge {
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
  color: var(--c-text-soft);
  flex-shrink: 0;
}

.voice-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  text-align: left;
}

.voice-card:hover { border-color: var(--c-primary); }
.voice-card:active { transform: scale(0.98); }

.voice-card.selected {
  border-color: var(--c-primary);
  background: var(--c-primary-light);
}

.voice-card-icon { font-size: 1.6rem; flex-shrink: 0; }

.voice-card-info { flex: 1; min-width: 0; }

.voice-card-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-text);
}

.voice-check { color: var(--c-primary); }

.voice-card-sub {
  font-size: 0.78rem;
  color: var(--c-text-soft);
  margin-top: 2px;
}

.voice-warn {
  display: block;
  font-size: 0.7rem;
  color: #856404;
  background: #fff3cd;
  border-radius: 6px;
  padding: 3px 7px;
  margin-top: 6px;
}

.voice-card-play {
  font-size: 1.1rem;
  opacity: 0.6;
  flex-shrink: 0;
}

.voice-status {
  font-size: 0.78rem;
  color: var(--c-text-soft);
  text-align: center;
  margin-bottom: 14px;
  min-height: 18px;
  line-height: 1.4;
}

/* ---- Quiz setup ---- */
.quiz-setup {
  display: grid;
  gap: 20px;
}

.setup-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text-soft);
  margin-bottom: 10px;
}

.quiz-type-list {
  display: grid;
  gap: 10px;
}

.quiz-type-card {
  background: var(--c-surface);
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
  display: flex;
  align-items: center;
  gap: 14px;
}

.quiz-type-card:hover {
  border-color: var(--c-primary);
  box-shadow: 0 4px 12px var(--c-shadow);
}

.quiz-type-card:active { transform: scale(0.98); }

.quiz-type-icon { font-size: 1.8rem; flex-shrink: 0; }

.quiz-type-info h4 { font-size: 1rem; font-weight: 700; }
.quiz-type-info p { font-size: 0.82rem; color: var(--c-text-soft); margin-top: 2px; }

/* ---- Quiz play ---- */
.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.quiz-progress {
  display: flex;
  gap: 14px;
  font-size: 0.85rem;
  font-weight: 600;
}

.quiz-bar {
  height: 6px;
  background: var(--c-border);
  border-radius: 3px;
  margin-bottom: 24px;
  overflow: hidden;
}

.quiz-bar-fill {
  height: 100%;
  background: var(--c-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

.quiz-question {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  margin-bottom: 16px;
  border: 1px solid var(--c-border);
}

.quiz-q-emoji { font-size: 3.5rem; margin-bottom: 12px; }

.quiz-q-cantonese {
  font-family: var(--font-cn);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.4;
}

.quiz-q-jyutping {
  font-size: 1rem;
  color: var(--c-primary);
  font-weight: 500;
  margin-top: 6px;
}

.quiz-q-prompt {
  font-size: 0.9rem;
  color: var(--c-text-soft);
  margin-top: 10px;
}

.quiz-q-blank {
  font-family: var(--font-cn);
  font-size: 1.3rem;
  margin-top: 10px;
}

.quiz-q-blank .blank {
  display: inline-block;
  min-width: 60px;
  border-bottom: 3px solid var(--c-primary);
  color: var(--c-primary);
  font-weight: 700;
}

.quiz-options {
  display: grid;
  gap: 10px;
}

.quiz-option {
  background: var(--c-surface);
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
  min-height: var(--tap);
  display: flex;
  align-items: center;
  justify-content: center;
}

.quiz-option:hover { border-color: var(--c-primary); }

.quiz-option.correct {
  background: #d4edda;
  border-color: var(--c-correct);
  color: #1b5e20;
}

.quiz-option.wrong {
  background: #f8d7da;
  border-color: var(--c-wrong);
  color: #b71c1c;
}

.quiz-option.disabled { pointer-events: none; opacity: 0.7; }

.quiz-feedback {
  text-align: center;
  margin-top: 16px;
  min-height: 30px;
}

.quiz-feedback .fb-correct {
  color: var(--c-correct);
  font-weight: 700;
  font-size: 1.1rem;
}

.quiz-feedback .fb-wrong {
  color: var(--c-wrong);
  font-weight: 700;
  font-size: 1.1rem;
}

.quiz-feedback .fb-next {
  margin-top: 12px;
}

.quiz-listen-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: none;
  background: var(--c-primary);
  color: #fff;
  font-size: 1.8rem;
  cursor: pointer;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quiz-listen-btn.playing { animation: pulse 0.6s infinite; }

/* ---- Progress view ---- */
.progress-content { display: grid; gap: 16px; }

.progress-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px;
}

.progress-card h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-text-soft);
  margin-bottom: 10px;
}

.progress-score {
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-primary);
}

.progress-detail {
  font-size: 0.85rem;
  color: var(--c-text-soft);
  margin-top: 4px;
}

.progress-empty {
  text-align: center;
  color: var(--c-text-soft);
  padding: 40px 20px;
  font-size: 0.9rem;
}

.progress-bar-mini {
  height: 8px;
  background: var(--c-border);
  border-radius: 4px;
  margin-top: 8px;
  overflow: hidden;
}

.progress-bar-mini-fill {
  height: 100%;
  background: var(--c-primary);
  border-radius: 4px;
  transition: width 0.4s ease;
}

/* ---- Bottom nav ---- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  display: flex;
  justify-content: space-around;
  z-index: 90;
  max-width: var(--max-w);
  margin: 0 auto;
  box-shadow: 0 -2px 8px var(--c-shadow);
}

.nav-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 8px 4px 6px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--c-text-soft);
  font-size: 0.7rem;
  font-weight: 600;
  transition: color 0.15s;
  min-height: 64px;
}

.nav-btn.active { color: var(--c-primary); }
.nav-icon { font-size: 1.3rem; }

/* ===========================================================================
   ADMIN
   =========================================================================== */

.admin-body { background: #eef0f4; }

.admin-header { background: #1d3557; }

.admin-header .logo-text { color: #fff; }
.admin-header .admin-link { color: rgba(255,255,255,0.8); }
.admin-header .admin-link:hover { background: rgba(255,255,255,0.1); color: #fff; }

.admin-main { max-width: 800px; padding: 20px 16px; }

.admin-section { display: none; }
.admin-section.active { display: block; animation: fadeIn 0.2s; }

/* ---- Login ---- */
.login-card {
  max-width: 380px;
  margin: 40px auto;
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 4px 20px var(--c-shadow-lg);
}

.login-icon { font-size: 3rem; margin-bottom: 12px; }

.login-card h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.login-hint {
  font-size: 0.85rem;
  color: var(--c-text-soft);
  margin-bottom: 24px;
}

.login-card form { text-align: left; }

/* ---- Form fields ---- */
.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--c-text);
}

.form-field input,
.form-field select {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-en);
  transition: border-color 0.15s;
}

.form-field input:focus,
.form-field select:focus {
  border-color: var(--c-primary);
  outline: none;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-hint {
  font-size: 0.78rem;
  color: var(--c-text-soft);
  margin-top: 4px;
}

.form-error {
  color: var(--c-wrong);
  font-size: 0.85rem;
  margin-bottom: 12px;
  min-height: 18px;
}

/* ---- Admin tabs ---- */
.admin-tabs {
  display: flex;
  gap: 4px;
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 20px;
  border: 1px solid var(--c-border);
}

.admin-tab {
  flex: 1;
  padding: 10px 8px;
  border: none;
  background: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text-soft);
  cursor: pointer;
  transition: all 0.15s;
}

.admin-tab.active {
  background: var(--c-primary);
  color: #fff;
}

.admin-tab-content { display: none; }
.admin-tab-content.active { display: block; animation: fadeIn 0.2s; }

/* ---- Admin toolbar ---- */
.admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.admin-toolbar h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.admin-hint {
  font-size: 0.8rem;
  color: var(--c-text-soft);
  margin-bottom: 14px;
}

.admin-filters {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
}

.admin-filters select,
.admin-filters input {
  padding: 10px 12px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.admin-filters input { flex: 1; }

/* ---- Admin vocab list ---- */
.admin-list { display: grid; gap: 8px; }

.admin-vocab-row {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-vocab-emoji { font-size: 1.4rem; flex-shrink: 0; }

.admin-vocab-body { flex: 1; min-width: 0; }

.admin-vocab-yue {
  font-family: var(--font-cn);
  font-size: 1.05rem;
  font-weight: 700;
}

.admin-vocab-en {
  font-size: 0.82rem;
  color: var(--c-text-soft);
}

.admin-vocab-meta {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.admin-vocab-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--c-bg);
  color: var(--c-text-soft);
}

.admin-vocab-tag.tag-1 { background: #d4edda; color: #1b5e20; }
.admin-vocab-tag.tag-2 { background: #fff3cd; color: #856404; }
.admin-vocab-tag.tag-3 { background: #f8d7da; color: #b71c1c; }

.admin-vocab-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.admin-vocab-actions button {
  width: 36px;
  height: 36px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s;
}

.admin-vocab-actions .edit-btn:hover { background: #e3f2fd; }
.admin-vocab-actions .del-btn:hover { background: #f8d7da; }

/* ---- Admin category grid ---- */
.admin-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
}

.admin-cat-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
}

.admin-cat-icon { font-size: 1.8rem; margin-bottom: 6px; }
.admin-cat-name { font-weight: 700; font-size: 0.95rem; }
.admin-cat-name-yue { font-size: 0.8rem; color: var(--c-text-soft); margin-top: 2px; }

/* Position number badge on each category card */
.admin-cat-order {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--c-text-soft);
  background: var(--c-bg);
  border-radius: 10px;
  padding: 1px 8px;
  margin-bottom: 6px;
}

.admin-cat-actions { display: flex; gap: 6px; justify-content: center; margin-top: 8px; }

.admin-cat-actions button {
  width: 34px;
  height: 34px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.15s, opacity 0.15s;
}

.admin-cat-actions button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.admin-cat-actions .move-btn:hover:not(:disabled) { background: #e3f2fd; }
.admin-cat-actions .edit-btn:hover { background: #e3f2fd; }
.admin-cat-actions .del-btn:hover { background: #f8d7da; }

/* ---- Stats grid ---- */
.stats-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }

.stat-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px;
}

.stat-card h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--c-text-soft);
  margin-bottom: 8px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-primary);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--c-text-soft);
}

.learner-stat {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 10px;
}

.learner-stat-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.learner-stat-level {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.learner-stat-level span {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 12px;
  background: var(--c-bg);
}

/* ---- Modal form ---- */
.modal-form {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 460px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.25s ease;
}

.modal-form h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 18px;
}

/* ===========================================================================
   RESPONSIVE — tablet / desktop
   =========================================================================== */

@media (min-width: 480px) {
  .level-cards { grid-template-columns: 1fr 1fr 1fr; }
  .cat-strip { grid-template-columns: repeat(3, 1fr); }
  .hero-title { font-size: 1.9rem; }
  .stats-grid { grid-template-columns: 1fr 1fr 1fr; }
}

@media (min-width: 640px) {
  .app-main { padding: 24px 20px; }
  .hero-title { font-size: 2.1rem; }
  .vocab-card { padding: 18px; }
  .vocab-cantonese { font-size: 1.4rem; }
  .quiz-option { font-size: 1.05rem; }
}

@media (min-width: 800px) {
  .header-inner, .app-main, .bottom-nav { max-width: 720px; }
}

/* ---- Scrollbar styling ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 3px; }