/* ============================================================
   Chai — Chinese Learning App — Styles
   Theme: Chinese red & gold
   ============================================================ */

/* ── Variables ──────────────────────────────────────────── */
:root {
  --red:          #c0392b;
  --red-dark:     #962d22;
  --red-light:    #fdecea;
  --gold:         #f39c12;
  --gold-light:   #fef9ec;

  --color-primary:       var(--red);
  --color-primary-dark:  var(--red-dark);
  --color-primary-light: var(--red-light);

  --color-bg:            #f8f5f0;
  --color-surface:       #ffffff;
  --color-surface-2:     #f3ede6;
  --color-border:        #e8ddd4;
  --color-text:          #1a1008;
  --color-text-secondary:#6b5b4e;
  --color-text-muted:    #a08c7d;
  --color-shadow:        rgba(100, 50, 30, 0.1);

  --app-bar-height:    56px;
  --bottom-nav-height: 64px;

  --safe-top:    env(safe-area-inset-top,    0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left:   env(safe-area-inset-left,   0px);
  --safe-right:  env(safe-area-inset-right,  0px);

  --space-xs: 4px;  --space-sm: 8px;  --space-md: 16px;
  --space-lg: 24px; --space-xl: 32px;

  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px;
  --radius-xl: 24px; --radius-full: 9999px;

  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 11px; --font-size-sm: 13px; --font-size-md: 15px;
  --font-size-lg: 17px; --font-size-xl: 20px; --font-size-2xl: 26px;

  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
}

[data-theme="dark"] {
  --color-bg:            #180e08;
  --color-surface:       #251812;
  --color-surface-2:     #352318;
  --color-border:        #4a3025;
  --color-text:          #f5ede6;
  --color-text-secondary:#c4a898;
  --color-text-muted:    #8a6858;
  --color-shadow:        rgba(0,0,0,0.4);
  --color-primary-light: #4a1208;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box; margin: 0; padding: 0;
  -webkit-tap-highlight-color: transparent;
}
html { font-size: var(--font-size-md); scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg); color: var(--color-text);
  min-height: 100dvh; display: flex; flex-direction: column;
  overflow-x: hidden;
  transition: background var(--transition-normal), color var(--transition-normal);
}
img, svg { display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input  { font-family: inherit; font-size: inherit; }

/* ── Mic permission banner ──────────────────────────────── */
.mic-perm-banner {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--gold-light); border-bottom: 1px solid var(--gold);
  font-size: var(--font-size-sm); color: var(--color-text);
  flex-wrap: wrap;
}
.mic-perm-banner span { flex: 1; min-width: 0; }
.mic-perm-btn {
  background: var(--gold); color: #fff; border: none; border-radius: var(--radius-full);
  padding: 4px 14px; font-size: var(--font-size-sm); font-weight: 700; cursor: pointer;
  flex-shrink: 0;
}
.mic-perm-dismiss {
  background: none; border: none; color: var(--color-text-muted);
  font-size: 14px; cursor: pointer; flex-shrink: 0; padding: 2px 4px;
}
[data-theme="dark"] .mic-perm-banner { background: #2a2000; border-color: var(--gold); }

/* ── App Bar ────────────────────────────────────────────── */
.app-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: calc(var(--app-bar-height) + var(--safe-top));
  padding-top: var(--safe-top);
  padding-left: calc(var(--space-sm) + var(--safe-left));
  padding-right: calc(var(--space-sm) + var(--safe-right));
  background: var(--red);
  display: flex; align-items: center; gap: var(--space-sm);
  box-shadow: 0 2px 8px rgba(150,45,34,0.35);
}
.app-bar__logo {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.18); display: flex; align-items: center;
  justify-content: center; font-size: 22px; flex-shrink: 0;
}
.app-bar__title { flex: 1; font-size: var(--font-size-lg); font-weight: 700; color: #fff; letter-spacing: 0.01em; }
.icon-btn {
  width: 44px; height: 44px; display: flex; align-items: center;
  justify-content: center; border-radius: var(--radius-full); color: rgba(255,255,255,0.85);
  transition: background var(--transition-fast);
}
.icon-btn:hover { background: rgba(255,255,255,0.15); }
.icon-btn:active { background: rgba(255,255,255,0.25); }
.icon-btn svg { width: 22px; height: 22px; }
.icon-sun  { display: block; }
.icon-moon { display: none;  }
[data-theme="dark"] .icon-sun  { display: none;  }
[data-theme="dark"] .icon-moon { display: block; }

/* ── Layout ─────────────────────────────────────────────── */
.main-content {
  flex: 1;
  margin-top: calc(var(--app-bar-height) + var(--safe-top));
  margin-bottom: calc(var(--bottom-nav-height) + var(--safe-bottom));
  overflow-y: auto; overflow-x: hidden;
  -webkit-overflow-scrolling: touch; overscroll-behavior-y: contain;
}
.page {
  display: none; padding: var(--space-md);
  padding-left:  calc(var(--space-md) + var(--safe-left));
  padding-right: calc(var(--space-md) + var(--safe-right));
  min-height: 100%; animation: fadeIn var(--transition-normal) both;
}
.page.active { display: block; }
@keyframes fadeIn { from { opacity:0; transform:translateY(6px); } to { opacity:1; transform:translateY(0); } }
.hidden { display: none !important; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-sm); height: 48px; padding: 0 var(--space-lg);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm); font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  user-select: none;
}
.btn:active { transform: scale(0.96); }
.btn--primary {
  background: var(--red); color: #fff;
  box-shadow: 0 4px 12px rgba(192,57,43,0.35);
}
.btn--primary:hover { background: var(--red-dark); }
.btn--outline {
  background: transparent; color: var(--red);
  border: 2px solid var(--red);
}
.btn--outline:hover { background: var(--red-light); }
.btn--ghost { background: var(--color-surface-2); color: var(--color-text-secondary); }
.btn--ghost:hover { background: var(--color-border); }
.btn--sm { padding: 4px 10px; font-size: 12px; }
.btn--full { width: 100%; margin: var(--space-sm) 0; }
.btn--record {
  background: var(--red); color: #fff;
  box-shadow: 0 4px 12px rgba(192,57,43,0.3);
}
.btn--record.recording {
  background: #e74c3c;
  animation: pulse 1s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{ box-shadow:0 0 0 0 rgba(231,76,60,.4); } 50%{ box-shadow:0 0 0 12px rgba(231,76,60,0); } }

/* ── Home Page ──────────────────────────────────────────── */
.home-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-md); padding-top: var(--space-sm);
}
.home-greeting__cn { font-size: var(--font-size-2xl); font-weight: 800; color: var(--red); }
.home-greeting__en { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: 2px; }
.streak-badge {
  display: flex; align-items: center; gap: 4px;
  background: var(--gold-light); border: 1.5px solid var(--gold);
  border-radius: var(--radius-full); padding: 6px 12px;
  font-size: var(--font-size-sm); font-weight: 700; color: #b7770d;
}
[data-theme="dark"] .streak-badge { background: #3a2a00; border-color: #c8860a; color: #f0b429; }

.stats-row {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-sm); margin-bottom: var(--space-md);
}
.stat-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-md) var(--space-sm);
  text-align: center;
}
.stat-card--accent { background: var(--red-light); border-color: #f0b0a8; }
[data-theme="dark"] .stat-card--accent { background: #4a1208; border-color: #8a2418; }
.stat-card__value { font-size: var(--font-size-xl); font-weight: 800; color: var(--color-text); }
.stat-card--accent .stat-card__value { color: var(--red); }
.stat-card__label { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 2px; }

.section-label {
  font-size: var(--font-size-sm); font-weight: 700; color: var(--color-text-secondary);
  text-transform: uppercase; letter-spacing: 0.06em;
  margin: var(--space-lg) 0 var(--space-sm);
}
.topic-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.topic-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-sm) 4px;
  text-align: center; cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.topic-card:active { transform: scale(0.94); }
.topic-card__emoji { font-size: 22px; margin-bottom: 4px; }
.topic-card__name  { font-size: 10px; font-weight: 600; color: var(--color-text); }
.topic-card__progress { font-size: 9px; color: var(--color-text-muted); margin-top: 2px; }

.tip-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-lg);
  text-align: center; margin-bottom: var(--space-md);
}
.tip-card__cn { font-size: 40px; font-weight: 800; color: var(--red); line-height: 1.1; }
.tip-card__pinyin { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: var(--space-sm); }
.tip-card__en { font-size: var(--font-size-sm); color: var(--color-text-muted); margin-top: 4px; }

/* ── Home — My Words widget ─────────────────────────────── */
.home-dict-label {
  display: flex; align-items: center; justify-content: space-between;
}
.home-dict-label__btn {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 10px; font-weight: 700; color: var(--red);
  background: var(--red-light); border: 1px solid #f0b0a8;
  border-radius: var(--radius-full); padding: 3px 10px; cursor: pointer;
  transition: background var(--transition-fast);
}
.home-dict-label__btn:hover { background: #f5c4be; }
[data-theme="dark"] .home-dict-label__btn { background: #4a1208; border-color: #8a2418; }

.home-dict-empty {
  font-size: var(--font-size-sm); color: var(--color-text-muted);
  padding: var(--space-sm) 0 var(--space-md);
}
.home-dict-empty__link {
  color: var(--red); font-weight: 600; text-decoration: underline;
  background: none; border: none; cursor: pointer; font-size: inherit; padding: 0;
}

.home-dict-chips {
  display: flex; flex-wrap: wrap; gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}
.home-dict-chip {
  display: flex; flex-direction: column; align-items: center;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 6px 10px; cursor: pointer;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  min-width: 52px;
}
.home-dict-chip:active { transform: scale(0.94); }
.home-dict-chip--due { border-color: var(--red); background: var(--red-light); }
[data-theme="dark"] .home-dict-chip--due { background: #4a1208; border-color: #c0392b; }
.home-dict-chip__char { font-size: 26px; color: var(--red); font-weight: 900; line-height: 1.1; }
.home-dict-chip__en   { font-size: 9px; color: var(--color-text-muted); margin-top: 2px; white-space: nowrap; max-width: 60px; overflow: hidden; text-overflow: ellipsis; }

.home-dict-study-btn  { margin-top: var(--space-xs); margin-bottom: var(--space-sm); }

/* ── Page header ────────────────────────────────────────── */
.page-header { margin-bottom: var(--space-lg); padding-top: var(--space-sm); }
.page-header h2 { font-size: var(--font-size-2xl); font-weight: 800; }
.page-subtitle { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: 4px; }

/* ── Topic List (Topics + Characters pages) ─────────────── */
.topic-item {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-md);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-md); margin-bottom: var(--space-sm); cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.topic-item:active { transform: scale(0.98); }
.topic-item__left { display: flex; align-items: center; gap: var(--space-md); }
.topic-item__emoji { font-size: 28px; flex-shrink: 0; }
.topic-item__name { font-size: var(--font-size-md); font-weight: 600; }
.topic-item__desc { font-size: var(--font-size-xs); color: var(--color-text-secondary); margin-top: 2px; }
.topic-item__right { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; flex-shrink: 0; }
.topic-item__stat { font-size: var(--font-size-xs); font-weight: 600; color: var(--color-text-muted); }
.topic-item__bar { width: 60px; height: 4px; background: var(--color-border); border-radius: 2px; overflow: hidden; }
.topic-item__bar-fill { height: 100%; background: var(--red); border-radius: 2px; transition: width .4s ease; }

/* ── Training mode selector (Practice page) ─────────────── */
.mode-section-title {
  font-size: var(--font-size-xs); font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: var(--color-text-muted);
  margin: var(--space-md) 0 var(--space-sm);
}
.mode-period-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-sm); }
.mode-period-btn {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 10px 4px; font-size: var(--font-size-sm);
  font-weight: 600; cursor: pointer; color: var(--color-text); text-align: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.mode-period-btn:not(:disabled):active { background: var(--color-border); }
.mode-period-btn:disabled { opacity: .35; cursor: default; }
.practice-modes { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-sm); margin-bottom: var(--space-sm); }
.practice-mode-btn {
  background: var(--color-surface); border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-md) var(--space-sm);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  cursor: pointer; transition: border-color var(--transition-fast), background var(--transition-fast);
  text-align: center;
}
.practice-mode-btn:active { background: var(--color-border); }
.practice-mode-btn > span:first-child { font-size: 22px; }
.practice-mode-btn__label { font-size: var(--font-size-sm); font-weight: 700; color: var(--color-text); }
.practice-mode-btn__sub { font-size: var(--font-size-xs); color: var(--color-text-muted); }

/* ── Flashcard ──────────────────────────────────────────── */
.fc-header {
  display: flex; align-items: center; gap: var(--space-sm);
  margin-bottom: var(--space-md); padding-top: var(--space-sm);
}
.fc-progress-bar {
  flex: 1; height: 6px; background: var(--color-border);
  border-radius: 3px; overflow: hidden;
}
.fc-progress-bar > div {
  height: 100%; background: var(--red); border-radius: 3px;
  transition: width .3s ease; width: 0%;
}
.fc-progress-text { font-size: var(--font-size-xs); color: var(--color-text-muted); white-space: nowrap; }

.flashcard {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  min-height: 260px; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: var(--space-xl) var(--space-lg);
  text-align: center; margin-bottom: var(--space-md);
  box-shadow: 0 4px 20px var(--color-shadow);
}
.flashcard__char {
  font-size: 96px; line-height: 1.1; color: var(--red);
  font-weight: 900; margin-bottom: var(--space-sm); user-select: none;
}
.flashcard__topic-tag {
  font-size: var(--font-size-xs); color: var(--color-text-muted);
  background: var(--color-surface-2); padding: 3px 10px;
  border-radius: var(--radius-full);
}
.flashcard__pinyin  { font-size: var(--font-size-xl); color: var(--gold); font-weight: 600; margin-bottom: 4px; }
.flashcard__english { font-size: var(--font-size-md); color: var(--color-text); margin-bottom: var(--space-sm); }
.flashcard__example {
  font-size: var(--font-size-sm); color: var(--color-text-secondary);
  background: var(--color-surface-2); border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md); line-height: 1.5; width: 100%;
}

.rating-row {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm); margin-top: var(--space-sm);
}
.rating-btn {
  height: 52px; border-radius: var(--radius-md); font-size: var(--font-size-sm);
  font-weight: 700; border: 2px solid transparent;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.rating-btn:active { transform: scale(0.94); }
.r1 { background:#fdecea; color:#c0392b; border-color:#f0b0a8; }
.r2 { background:#fff8e1; color:#b7770d; border-color:#f5cc6e; }
.r3 { background:#e8f5e9; color:#2e7d32; border-color:#a5d6a7; }
.r4 { background:#e3f2fd; color:#1565c0; border-color:#90caf9; }
.fc-open-card-btn { margin-top: var(--space-sm); gap: 6px; display: flex; align-items: center; justify-content: center; font-size: var(--font-size-sm); }
[data-theme="dark"] .r1 { background:#4a1208; border-color:#8a2418; }
[data-theme="dark"] .r2 { background:#3a2a00; border-color:#8a6000; }
[data-theme="dark"] .r3 { background:#0a3a0a; border-color:#2e7d32; }
[data-theme="dark"] .r4 { background:#0a1a3a; border-color:#1565c0; }

.done-screen {
  text-align: center; padding: var(--space-xl) var(--space-md);
  display: flex; flex-direction: column; align-items: center; gap: var(--space-md);
}
.done-screen__emoji { font-size: 72px; line-height: 1; }
.done-screen h2 { font-size: var(--font-size-2xl); font-weight: 800; }
.done-screen p { color: var(--color-text-secondary); font-size: var(--font-size-md); }

/* ── Practice ───────────────────────────────────────────── */
.practice-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-lg);
  margin-bottom: var(--space-md);
}
.practice-card__head {
  display: flex; gap: var(--space-md); align-items: flex-start;
  margin-bottom: var(--space-lg);
}
.practice-card__head > span { font-size: 28px; flex-shrink: 0; }
.practice-card__head strong { display: block; font-size: var(--font-size-md); font-weight: 700; margin-bottom: 2px; }
.practice-card__head p { font-size: var(--font-size-sm); color: var(--color-text-secondary); }
.practice-target { text-align: center; margin-bottom: var(--space-lg); }
.practice-target__char { font-size: 72px; line-height: 1.2; color: var(--red); font-weight: 900; }
.practice-target__pinyin { font-size: var(--font-size-lg); color: var(--gold); font-weight: 600; margin-top: 4px; }
.practice-actions { display: flex; gap: var(--space-sm); margin-bottom: var(--space-md); }
.practice-actions .btn { flex: 1; }
.voice-result {
  min-height: 40px; padding: var(--space-sm) var(--space-md);
  background: var(--color-surface-2); border-radius: var(--radius-md);
  font-size: var(--font-size-sm); color: var(--color-text-secondary);
  text-align: center; margin-bottom: var(--space-md);
}
.reading-area {
  background: var(--color-surface-2); border-radius: var(--radius-md);
  padding: var(--space-md); min-height: 80px;
  font-size: var(--font-size-md); line-height: 1.8; margin-bottom: var(--space-md);
}
.reading-placeholder { color: var(--color-text-muted); text-align: center; padding: var(--space-md) 0; }
.stub-note {
  margin-top: var(--space-md); font-size: var(--font-size-xs);
  color: var(--color-text-muted); background: var(--color-surface-2);
  padding: var(--space-sm) var(--space-md); border-radius: var(--radius-sm);
}
.stub-note code { font-family: monospace; color: var(--red); }

/* ── Bottom Nav ─────────────────────────────────────────── */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
  height: calc(var(--bottom-nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--color-surface); border-top: 1px solid var(--color-border);
  display: flex; align-items: stretch;
  box-shadow: 0 -1px 3px var(--color-shadow);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}
.nav-item {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 2px;
  color: var(--color-text-muted); font-size: 9px; font-weight: 600;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}
.nav-item svg { width: 20px; height: 20px; transition: transform var(--transition-fast); }
.nav-item.active { color: var(--red); }
.nav-item.active svg { transform: translateY(-2px); }
.nav-item:active { color: var(--red); }

/* ── Toast ──────────────────────────────────────────────── */
.toast {
  position: fixed; z-index: 200;
  bottom: calc(var(--bottom-nav-height) + var(--safe-bottom) + var(--space-md));
  left: 50%; transform: translateX(-50%) translateY(80px);
  background: var(--color-text); color: var(--color-bg);
  padding: var(--space-sm) var(--space-lg); border-radius: var(--radius-full);
  font-size: var(--font-size-sm); font-weight: 500;
  opacity: 0; pointer-events: none; white-space: nowrap;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  max-width: calc(100vw - 48px); text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Large screens ──────────────────────────────────────── */
@media (min-width: 600px) {
  .app-bar, .bottom-nav {
    max-width: 480px; left: 50%; right: auto;
    transform: translateX(-50%);
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
  }
  .main-content { max-width: 480px; margin-left: auto; margin-right: auto; }
  body { background: var(--color-surface-2); }
}

/* ── Reduced Motion ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── Course page ─────────────────────────────────────────── */
.course-create-row {
  display: flex; flex-direction: column; gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.course-generating {
  display: flex; align-items: center; gap: var(--space-md);
  padding: var(--space-md) 0;
  color: var(--color-text-muted); font-size: var(--font-size-sm);
}
.course-topic-list {
  display: flex; flex-direction: column; gap: var(--space-sm);
}
.course-empty {
  color: var(--color-text-muted); font-size: var(--font-size-sm);
  text-align: center; padding: var(--space-xl) 0;
}
.course-topic-card {
  display: flex; align-items: center; gap: var(--space-md);
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}
.course-topic-card:active { transform: scale(0.98); }
.course-topic-card:hover  { border-color: var(--red); }
.course-topic-card__emoji { font-size: 32px; flex-shrink: 0; line-height: 1; }
.course-topic-card__body  { flex: 1; min-width: 0; }
.course-topic-card__title { font-size: var(--font-size-sm); font-weight: 700; color: var(--color-text); line-height: 1.4; }
.course-topic-card__date  { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 2px; }
.course-topic-card__actions { display: flex; align-items: center; gap: var(--space-sm); flex-shrink: 0; }
.course-topic-card__arrow { color: var(--color-text-muted); opacity: 0.5; }
.course-topic-card__del {
  background: none; border: none; cursor: pointer;
  color: var(--color-text-muted); padding: 4px; border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}
.course-topic-card__del:hover { color: var(--red); }
.modal-textarea {
  height: auto; padding: var(--space-sm) var(--space-md);
  resize: vertical; font-family: inherit; line-height: 1.5;
}
.course-section-divider {
  font-size: var(--font-size-xs); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-text-muted);
  padding: var(--space-md) 0 var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-sm);
}

/* ── Strokes page ───────────────────────────────────────── */
.strokes-page-hdr {
  display: flex; align-items: center; gap: var(--space-md);
  padding: var(--space-md) 0 var(--space-sm);
}
.strokes-page-title { font-size: 1.3rem; font-weight: 700; margin: 0; }

.strokes-tabs {
  display: flex; gap: var(--space-sm);
  background: var(--color-surface-2); border-radius: var(--radius-full);
  padding: 4px; margin-bottom: var(--space-lg);
}
.strokes-tab {
  flex: 1; padding: 8px; border-radius: var(--radius-full);
  font-size: var(--font-size-sm); font-weight: 600;
  color: var(--color-text-muted); background: none; border: none; cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.strokes-tab--active {
  background: var(--color-surface); color: var(--color-text);
  box-shadow: 0 1px 4px var(--color-shadow);
}

.stroke-family-label {
  font-size: var(--font-size-xs); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-text-muted);
  padding: var(--space-sm) 0 var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  margin: var(--space-lg) 0 var(--space-sm);
}

/* ── Quiz ───────────────────────────────────────────────── */
.quiz-prog-row {
  display: flex; align-items: center; gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.quiz-prog-bar {
  flex: 1; height: 6px; border-radius: var(--radius-full);
  background: var(--color-border); overflow: hidden;
}
.quiz-prog-fill {
  height: 100%; border-radius: var(--radius-full);
  background: var(--red); width: 0;
  transition: width 0.3s ease;
}
.quiz-prog-text { font-size: var(--font-size-xs); font-weight: 700; color: var(--color-text-muted); white-space: nowrap; }

.quiz-stroke-display {
  display: flex; justify-content: center; align-items: center;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-xl);
  margin-bottom: var(--space-lg); color: var(--color-text);
}
.quiz-question {
  font-size: var(--font-size-sm); font-weight: 600; color: var(--color-text-muted);
  text-align: center; margin: 0 0 var(--space-md);
}
.quiz-options {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--space-sm); margin-bottom: var(--space-md);
}
.quiz-opt {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: var(--space-md); border-radius: var(--radius-md);
  background: var(--color-surface); border: 2px solid var(--color-border);
  cursor: pointer; transition: border-color var(--transition-fast), background var(--transition-fast);
}
.quiz-opt:hover:not(:disabled) { border-color: var(--red); background: var(--color-primary-light); }
.quiz-opt__name   { font-size: 1.4rem; font-weight: 700; color: var(--color-text); font-family: var(--font-sans); }
.quiz-opt__pinyin { font-size: 0.72rem; color: var(--color-text-muted); }
.quiz-opt--correct { border-color: #27ae60 !important; background: #d5f5e3 !important; }
.quiz-opt--wrong   { border-color: var(--red) !important; background: #fde8e8 !important; }
[data-theme="dark"] .quiz-opt--correct { background: #1a3d2b !important; }
[data-theme="dark"] .quiz-opt--wrong   { background: #3d1a1a !important; }
.quiz-next-btn { margin-top: var(--space-sm); }

.quiz-done__emoji { font-size: 4rem; text-align: center; margin: var(--space-xl) 0 var(--space-md); }
.quiz-done__score { font-size: 2rem; font-weight: 900; text-align: center; color: var(--red); margin-bottom: var(--space-sm); }
.quiz-done__msg   { text-align: center; color: var(--color-text-muted); font-size: var(--font-size-sm); margin-bottom: var(--space-xl); }

/* ── Stroke grid (in article content & strokes page) ────── */
.stroke-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 1rem 0 1.5rem;
}
.stroke-grid--5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 480px) {
  .stroke-grid--5 { grid-template-columns: repeat(3, 1fr); }
}
.stroke-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 6px 8px;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
}
.stroke-card__svg {
  width: 70px; height: 70px;
  display: block;
  color: var(--color-text);
}
.stroke-card__name {
  font-size: 1.3rem; font-weight: 700;
  color: var(--color-text); line-height: 1.1;
  font-family: var(--font-sans);
}
.stroke-card__pinyin {
  font-size: 0.72rem; color: var(--color-primary); font-weight: 600;
}
.stroke-card__desc {
  font-size: 0.68rem; color: var(--color-text-muted);
}
.stroke-card__ex {
  font-size: 0.68rem; color: var(--color-text-muted);
  font-style: italic;
}


/* ── Article page ──────────────────────────────────────── */
.article-back-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  padding: var(--space-sm) 0;
  margin-bottom: var(--space-md);
  cursor: pointer;
  transition: opacity var(--transition-fast);
}
.article-back-btn:hover { opacity: 0.75; }
.article-hero {
  width: 100%;
  height: 210px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  background: var(--color-surface-2);
}
.article-content {
  line-height: 1.75;
  color: var(--color-text);
}
.article-content h2 {
  font-size: var(--font-size-xl);
  font-weight: 800;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}
.article-content h3 {
  font-size: var(--font-size-md);
  font-weight: 700;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}
.article-content p {
  margin-bottom: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.article-content ul {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}
.article-content li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}
.article-content strong {
  color: var(--color-text);
  font-weight: 600;
}
.article-figure {
  margin: var(--space-lg) 0 var(--space-sm);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.article-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-md);
  font-size: var(--font-size-sm);
}
.article-content th {
  background: var(--color-surface-2);
  color: var(--color-text);
  font-weight: 700;
  padding: 8px 10px;
  text-align: left;
  border-bottom: 2px solid var(--color-primary);
}
.article-content td {
  padding: 8px 10px;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-surface-2);
}
.article-content tr:last-child td {
  border-bottom: none;
}

/* ══════════════════════════════════════════════════════════
   Dictionary — My Words
   ══════════════════════════════════════════════════════════ */

/* ── Toolbar ─────────────────────────────────────────────── */
.dict-toolbar {
  display: flex; gap: var(--space-sm); margin-bottom: var(--space-md); align-items: center;
}
.dict-search-wrap {
  flex: 1; position: relative; display: flex; align-items: center;
}
.dict-search-icon {
  position: absolute; left: 10px; color: var(--color-text-muted); pointer-events: none; flex-shrink: 0;
}
.dict-search-input {
  width: 100%; height: 44px; padding: 0 var(--space-md) 0 34px;
  border: 1.5px solid var(--color-border); border-radius: var(--radius-full);
  background: var(--color-surface); color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
}
.dict-search-input:focus { outline: none; border-color: var(--red); }
.dict-add-btn { flex-shrink: 0; height: 44px; padding: 0 var(--space-md); border-radius: var(--radius-full); }

/* ── Entry card (list) ──────────────────────────────────── */
.dict-entry-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-md);
  display: flex; align-items: center; gap: var(--space-md);
  margin-bottom: var(--space-sm); cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.dict-entry-card:active { transform: scale(0.98); }
.dict-entry__char {
  font-size: 44px; line-height: 1; color: var(--red); font-weight: 900;
  min-width: 52px; text-align: center; flex-shrink: 0;
}
.dict-entry__info { flex: 1; min-width: 0; }
.dict-entry__pinyin  { font-size: var(--font-size-sm); color: var(--gold); font-weight: 600; }
.dict-entry__english { font-size: var(--font-size-xs); color: var(--color-text-secondary); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dict-entry__right   { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; flex-shrink: 0; }
.dict-entry__arrow   { color: var(--color-text-muted); opacity: 0.5; }

/* ── SRS level badges ───────────────────────────────────── */
.dict-srs-badge {
  font-size: 9px; font-weight: 700; letter-spacing: 0.04em;
  padding: 2px 7px; border-radius: var(--radius-full); white-space: nowrap;
}
.dict-srs-new       { background: var(--color-surface-2); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.dict-srs-learning  { background: #fff8e1; color: #b7770d; border: 1px solid #f5cc6e; }
.dict-srs-good      { background: #e8f5e9; color: #2e7d32; border: 1px solid #a5d6a7; }
.dict-srs-mastered  { background: var(--red-light); color: var(--red); border: 1px solid #f0b0a8; }
[data-theme="dark"] .dict-srs-learning { background: #3a2a00; border-color: #8a6000; color: #f0b429; }
[data-theme="dark"] .dict-srs-good     { background: #0a3a0a; border-color: #2e7d32; }
[data-theme="dark"] .dict-srs-mastered { background: #4a1208; border-color: #8a2418; }
.dict-type-badge {
  font-size: 9px; font-weight: 700; letter-spacing: 0.04em;
  padding: 2px 7px; border-radius: var(--radius-full); white-space: nowrap;
}
.dict-type-radical   { background: #f3e6ff; color: #7c3aed; border: 1px solid #c4b5fd; }
.dict-type-component { background: #e0f2fe; color: #0369a1; border: 1px solid #7dd3fc; }
[data-theme="dark"] .dict-type-radical   { background: #2d1a4a; border-color: #7c3aed; color: #c4b5fd; }
[data-theme="dark"] .dict-type-component { background: #0c2a42; border-color: #0369a1; color: #7dd3fc; }

/* ── AI status indicators ───────────────────────────────── */
.dict-ai-spinner, .dict-ai-err { font-size: 14px; }

/* ── Empty state ────────────────────────────────────────── */
.dict-empty {
  text-align: center; padding: var(--space-xl) var(--space-lg);
  color: var(--color-text-secondary);
}
.dict-empty__icon { font-size: 56px; margin-bottom: var(--space-md); }
.dict-empty p     { font-size: var(--font-size-sm); line-height: 1.6; }

/* ── Sync ID row ────────────────────────────────────────── */
.dict-sync-row {
  display: flex; align-items: center; gap: 6px;
  padding: var(--space-sm) 0;
  margin-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 11px;
}
.dict-sync-label { flex: 1; }
.dict-sync-label code { font-family: monospace; font-size: 11px; }
.dict-clear-btn { color: var(--red) !important; }

/* ── Detail view ─────────────────────────────────────────── */
.dict-detail-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-md); padding-top: var(--space-xs);
}
.dict-detail-badges { display: flex; align-items: center; gap: var(--space-sm); flex-wrap: wrap; }
.dict-detail-tone {
  font-size: var(--font-size-xs); font-weight: 600;
  background: var(--gold-light); color: #b7770d;
  border: 1px solid var(--gold); border-radius: var(--radius-full);
  padding: 2px 8px;
}
[data-theme="dark"] .dict-detail-tone { background: #3a2a00; border-color: #c8860a; color: #f0b429; }
.dict-detail-strokes {
  font-size: var(--font-size-xs); font-weight: 600;
  color: var(--color-text-muted); background: var(--color-surface-2);
  border: 1px solid var(--color-border); border-radius: var(--radius-full);
  padding: 2px 8px;
}

.dict-hero {
  text-align: center; padding: var(--space-lg) 0 var(--space-md);
}
.dict-hero__char    { font-size: 96px; line-height: 1.1; color: var(--red); font-weight: 900; }
.dict-hero__pinyin  { font-size: var(--font-size-xl); color: var(--gold); font-weight: 600; margin-top: 4px; }
.dict-hero__english { font-size: var(--font-size-md); color: var(--color-text-secondary); margin-top: 4px; }

#dictDetailAiStatus { margin-bottom: var(--space-md); text-align: center; }
.dict-ai-loading    { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.dict-ai-err-msg    { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.dict-retry-btn {
  font-size: var(--font-size-xs); font-weight: 600; color: var(--red);
  text-decoration: underline; background: none; border: none; cursor: pointer; padding: 0 4px;
}

.dict-section { margin-bottom: var(--space-md); }
.dict-section__label {
  font-size: var(--font-size-xs); font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}
.dict-section__text { font-size: var(--font-size-sm); color: var(--color-text-secondary); line-height: 1.6; }
.dict-mnemonic {
  background: var(--gold-light); border-left: 3px solid var(--gold);
  padding: var(--space-sm) var(--space-md); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}
[data-theme="dark"] .dict-mnemonic { background: #2a1f00; border-left-color: #c8860a; }
.dict-phonetic-note {
  background: #eef6ff; border-left: 3px solid #3b82f6;
  padding: var(--space-sm) var(--space-md); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.55;
}
[data-theme="dark"] .dict-phonetic-note { background: #0f2340; border-left-color: #3b82f6; }
.dict-parts-chips { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.dict-part-chip {
  display: flex; flex-direction: column; align-items: center;
  padding: 6px 14px; border-radius: var(--radius-md);
  background: var(--surface-2); border: 1.5px solid var(--border);
  cursor: pointer; transition: border-color .15s, background .15s;
  line-height: 1.3;
}
.dict-part-chip:hover { border-color: var(--primary); background: var(--primary-light, #eef2ff); }
.dict-part-chip__char { font-size: 1.5rem; font-weight: 600; }
.dict-part-chip__sub  { font-size: 0.72rem; color: var(--text-2); }
[data-theme="dark"] .dict-part-chip:hover { background: #1a1f3a; }

/* ── Radicals grid ──────────────────────────────────────── */
.dict-radicals-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--space-sm);
}
.dict-radical {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-sm) var(--space-md);
  display: flex; flex-direction: column; gap: 2px;
}
.dict-radical__char    { font-size: 32px; color: var(--red); font-weight: 900; line-height: 1.1; }
.dict-radical__pinyin  { font-size: var(--font-size-xs); color: var(--gold); font-weight: 600; }
.dict-radical__meaning { font-size: var(--font-size-xs); color: var(--color-text-secondary); }
.dict-radical__pos     {
  font-size: 9px; color: var(--color-text-muted); background: var(--color-surface-2);
  border-radius: var(--radius-full); padding: 1px 6px; width: fit-content;
  text-transform: capitalize; margin-top: 2px;
}

/* ── Examples list ──────────────────────────────────────── */
.dict-examples-list { display: flex; flex-direction: column; gap: var(--space-sm); }
.dict-example {
  background: var(--color-surface-2); border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  display: flex; flex-direction: column; gap: 2px;
}
.dict-example__top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); }
.dict-example__zh     { font-size: var(--font-size-lg); color: var(--red); font-weight: 700; }
.dict-example__pinyin { font-size: var(--font-size-xs); color: var(--gold); }
.dict-example__en     { font-size: var(--font-size-xs); color: var(--color-text-secondary); }
.dict-audio-btn--ex {
  flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%;
  background: var(--color-surface); border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  padding: 0; color: var(--color-text-secondary);
  transition: background var(--transition-fast);
}
.dict-audio-btn--ex:active { background: var(--color-border); }
.dict-example__btns { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.dict-ex-expand-btn {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: transparent; border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  padding: 0; color: var(--color-text-muted);
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.dict-ex-expand-btn:active { background: var(--color-border); }
.dict-ex-expand-btn--open svg { transform: rotate(180deg); }
.dict-ex-breakdown {
  margin-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-sm);
  display: flex; flex-direction: column; gap: 6px;
}
.dict-ex-breakdown__loading { font-size: var(--font-size-xs); color: var(--color-text-muted); }
.dict-ex-word {
  display: flex; align-items: baseline; gap: var(--space-sm);
  padding: 4px 0;
}
.dict-ex-word__zh     { font-size: var(--font-size-md); font-weight: 700; color: var(--red); min-width: 2em; }
.dict-ex-word__pinyin { font-size: var(--font-size-xs); color: var(--gold); flex: 1; }
.dict-ex-word__en     { font-size: var(--font-size-xs); color: var(--color-text-secondary); text-align: right; }

/* ── Detail actions ─────────────────────────────────────── */
.dict-detail-actions { margin-top: var(--space-lg); padding-bottom: var(--space-md); }
.dict-delete-btn { color: #e74c3c !important; }

/* ── Audio button ───────────────────────────────────────── */
.dict-audio-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: var(--radius-full);
  background: var(--color-surface-2); border: 1.5px solid var(--color-border);
  color: var(--color-text-secondary); cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  margin-top: var(--space-sm); flex-shrink: 0;
}
.dict-audio-btn:hover  { background: var(--red-light); color: var(--red); border-color: #f0b0a8; }
.dict-audio-btn:active { transform: scale(0.92); }
[data-theme="dark"] .dict-audio-btn:hover { background: #4a1208; border-color: #8a2418; }

.dict-audio-btn--loading {
  color: var(--gold); border-color: var(--gold);
  animation: audioSpin 1s linear infinite;
}
@keyframes audioSpin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.dict-audio-btn--playing {
  background: var(--red-light); color: var(--red); border-color: var(--red);
  animation: audioPulse 0.8s ease-in-out infinite;
}
@keyframes audioPulse {
  0%, 100% { transform: scale(1);    opacity: 1; }
  50%       { transform: scale(1.12); opacity: 0.8; }
}
[data-theme="dark"] .dict-audio-btn--playing { background: #4a1208; border-color: #c0392b; }

/* Flashcard variant — centered in the card */
.dict-audio-btn--fc {
  width: 40px; height: 40px; margin: var(--space-xs) auto;
}

/* ── Flashcard back extras ──────────────────────────────── */
.dfc-desc {
  font-size: var(--font-size-xs); color: var(--color-text-secondary);
  margin: var(--space-sm) 0; line-height: 1.5; text-align: left; width: 100%;
}
.dfc-radicals {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin: var(--space-sm) 0; width: 100%; justify-content: center;
}
.dfc-radical {
  background: var(--color-surface-2); border-radius: var(--radius-sm);
  padding: 2px 8px; font-size: var(--font-size-xs); color: var(--color-text-secondary);
}
.dfc-radical em { color: var(--red); font-style: normal; font-weight: 600; margin-right: 3px; }
.dfc-examples {
  font-size: var(--font-size-xs); color: var(--color-text-secondary);
  background: var(--color-surface-2); border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md); width: 100%; line-height: 1.8; text-align: left;
}

/* ── Add word modal ─────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(0,0,0,0.55); display: flex;
  align-items: flex-end; justify-content: center;
  padding: 0 0 calc(var(--bottom-nav-height) + var(--safe-bottom)) 0;
  animation: fadeIn var(--transition-normal) both;
}
.modal-sheet {
  background: var(--color-surface); border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
  width: 100%; max-width: 480px;
  box-shadow: 0 -4px 24px var(--color-shadow);
}
.modal-title {
  font-size: var(--font-size-xl); font-weight: 800; margin-bottom: var(--space-lg);
  color: var(--color-text);
}
.modal-label {
  display: block; font-size: var(--font-size-xs); font-weight: 700;
  color: var(--color-text-secondary); text-transform: uppercase;
  letter-spacing: 0.05em; margin-bottom: 4px;
}
.modal-req { color: var(--red); }
.modal-input {
  display: block; width: 100%; height: 46px;
  padding: 0 var(--space-md);
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-surface); color: var(--color-text);
  font-size: var(--font-size-md); margin-bottom: var(--space-md);
  transition: border-color var(--transition-fast);
}
.modal-input:focus { outline: none; border-color: var(--red); }
.modal-error {
  font-size: var(--font-size-xs); color: var(--red);
  min-height: 18px; margin-bottom: var(--space-sm);
}
.modal-actions {
  display: flex; gap: var(--space-sm); margin-top: var(--space-sm);
}
.modal-actions .btn { flex: 1; }

.modal-ai-hint {
  font-size: var(--font-size-xs); color: var(--color-text-muted);
  margin-top: -10px; margin-bottom: var(--space-md);
}
.modal-input--ai {
  border-color: var(--gold) !important;
  background: var(--gold-light) !important;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
[data-theme="dark"] .modal-input--ai {
  background: #2a1f00 !important;
  border-color: #c8860a !important;
}
.modal-ai-status {
  font-size: var(--font-size-xs); min-height: 18px;
  margin-bottom: var(--space-xs);
}
.modal-ai-loading { color: var(--color-text-muted); }
.modal-ai-done    { color: #b7770d; font-weight: 600; }

/* ── Dict photo button ──────────────────────────────────── */
.dict-photo-btn {
  flex-shrink: 0; height: 44px; width: 44px; padding: 0;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
}

/* ── Photo import modal ─────────────────────────────────── */
.modal-sheet--photo {
  max-height: 85dvh; overflow-y: auto;
}

.photo-loading {
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-md); padding: var(--space-xl) 0;
  color: var(--color-text-muted);
}
.photo-loading__spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--red);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.photo-hint {
  font-size: var(--font-size-xs); color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
.photo-hint--x { opacity: 0.6; }

.photo-word-list { display: flex; flex-direction: column; gap: var(--space-xs); margin-bottom: var(--space-md); }

.photo-word-row {
  display: flex; align-items: center; gap: 6px;
  padding: var(--space-xs) var(--space-sm);
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg);
  transition: border-color var(--transition-fast);
}
.photo-word-row:focus-within { border-color: var(--red); }
.photo-word-row--exists { opacity: 0.5; }

.photo-word-input {
  border: none; background: transparent; color: var(--color-text);
  font-size: var(--font-size-sm); outline: none; min-width: 0;
}
.photo-word-input--char  { width: 48px; font-weight: 700; font-size: var(--font-size-md); color: var(--red); flex-shrink: 0; }
.photo-word-input--py    { flex: 1; color: var(--gold); }
.photo-word-input--en    { flex: 2; color: var(--color-text-secondary); }

.photo-word-exists {
  font-size: 10px; color: var(--color-text-muted); white-space: nowrap; flex-shrink: 0;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 2px 5px;
}

.photo-word-remove {
  background: none; border: none; cursor: pointer;
  color: var(--color-text-muted); font-size: 14px; line-height: 1;
  padding: 2px 4px; flex-shrink: 0;
  transition: color var(--transition-fast);
}
.photo-word-remove:hover { color: var(--red); }

.photo-empty {
  text-align: center; padding: var(--space-xl) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ── Mode selection view ─────────────────────────────────── */
.mode-select {
  display: flex; flex-direction: column; gap: var(--space-md);
  padding-top: var(--space-lg);
}
.mode-select__count {
  font-size: var(--font-size-sm); color: var(--color-text-muted);
  text-align: center; margin-bottom: var(--space-sm);
}
.mode-card {
  display: flex; align-items: center; gap: var(--space-md);
  background: var(--color-surface); border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-md) var(--space-lg);
  width: 100%; text-align: left; cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.mode-card:hover  { border-color: var(--red); }
.mode-card:active { transform: scale(0.98); }
.mode-card__icon { font-size: 36px; flex-shrink: 0; line-height: 1; }
.mode-card__body { flex: 1; }
.mode-card__body strong { display: block; font-size: var(--font-size-lg); font-weight: 800; color: var(--color-text); margin-bottom: 2px; }
.mode-card__body span   { font-size: var(--font-size-sm); color: var(--color-text-secondary); }
.mode-card > svg { flex-shrink: 0; color: var(--color-text-muted); }

/* ── Practice view ───────────────────────────────────────── */
.pr-task-label {
  font-size: var(--font-size-xs); font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
.pr-prompt {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-xl) var(--space-lg);
  text-align: center; margin-bottom: var(--space-md);
  box-shadow: 0 4px 20px var(--color-shadow);
  min-height: 140px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: var(--space-sm);
}
.pr-prompt__char      { font-size: 96px; line-height: 1.1; color: var(--red); font-weight: 900; user-select: none; }
.pr-prompt__english   { font-size: var(--font-size-2xl); font-weight: 700; color: var(--color-text); }
.pr-prompt__pinyin-big{ font-size: 2.4rem; font-weight: 900; color: var(--color-primary, var(--red)); letter-spacing: 0.04em; }
.pr-prompt__sub       { font-size: var(--font-size-md); color: var(--gold); font-weight: 600; }

.pr-input {
  display: block; width: 100%; height: 52px;
  padding: 0 var(--space-md);
  border: 2px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-surface); color: var(--color-text);
  font-size: var(--font-size-xl); text-align: center;
  font-weight: 700; margin-bottom: var(--space-sm);
  transition: border-color var(--transition-fast);
}
.pr-input:focus { outline: none; border-color: var(--red); }

.pr-feedback {
  display: flex; flex-direction: column; gap: var(--space-sm);
  align-items: center; padding: var(--space-md) 0;
}
.pr-feedback__badge {
  font-size: var(--font-size-xl); font-weight: 800;
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-full); letter-spacing: 0.02em;
}
.pr-feedback__badge--correct { background: #e8f5e9; color: #2e7d32; }
.pr-feedback__badge--wrong   { background: #fdecea; color: #c0392b; }
.pr-feedback__answer {
  font-size: var(--font-size-md); color: var(--color-text-secondary);
  background: var(--color-surface-2); border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md); width: 100%; text-align: center;
}
.pr-feedback .btn--primary { width: 100%; margin-top: var(--space-xs); }
[data-theme="dark"] .pr-feedback__badge--correct { background: #0a3a0a; color: #81c784; }
[data-theme="dark"] .pr-feedback__badge--wrong   { background: #4a1208; color: #ef9a9a; }

/* Gemini pronunciation feedback */
.pr-feedback__gemini {
  width: 100%; background: var(--color-surface-2);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm); text-align: left;
}
.pr-gemini__heard   { color: var(--color-text-muted); margin-bottom: 4px; }
.pr-gemini__heard em { font-style: normal; color: var(--color-text); font-weight: 600; }
.pr-gemini__feedback { color: var(--color-text); line-height: 1.5; }

/* Recording button */
.pr-record-wrap { display: flex; flex-direction: column; align-items: center; gap: var(--space-md); padding: var(--space-lg) 0; }
.pr-record-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-sm); width: 120px; height: 120px; border-radius: 50%;
  background: var(--color-surface-2); border: 3px solid var(--color-border);
  color: var(--color-text-muted); cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-xs); font-weight: 700;
}
.pr-record-btn:hover { border-color: var(--red); color: var(--red); }
.pr-record-btn--recording {
  background: var(--red); border-color: var(--red); color: #fff;
  animation: pr-pulse 1.2s ease-in-out infinite;
}
@keyframes pr-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(192,57,43,0.4); }
  50%       { box-shadow: 0 0 0 16px rgba(192,57,43,0); }
}
.pr-record-hint { font-size: var(--font-size-xs); color: var(--color-text-muted); text-align: center; }
.pr-skip-btn { margin-top: var(--space-xs); font-size: var(--font-size-sm); color: var(--color-text-muted); opacity: .7; }
.pr-record-checking { display: flex; align-items: center; gap: var(--space-sm); color: var(--color-text-muted); font-size: var(--font-size-sm); }