/* ─── CHAPTER NAV (shared across slides / worksheet / game) ─────── */
/* ── Chapter navigation tabs ── */
/* Nav container — constrains width and positions nav below header */
/* ─── SCREEN TRANSITIONS ────────────────────────────────────────── */
.game-screen { display: none; }
.game-screen.active { display: block; }

/* ─── START SCREEN ──────────────────────────────────────────────── */
.game-start {
  background: white;
  border: 1px solid var(--border-soft);
  border-top: 4px solid var(--accent);
  border-radius: 4px;
  padding: 32px 24px;
  text-align: center;
  margin-top: 8px;
}
.game-start h2 { font-size: 1.6rem; margin-bottom: 12px; }
.game-start p { color: var(--muted-deep); font-size: 0.95rem; line-height: 1.6; margin-bottom: 20px; }
.game-stats-row {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 20px 0;
  padding: 16px;
  background: var(--cream-deep);
  border-radius: 4px;
}
.game-stat { text-align: center; }
.game-stat-val {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}
.game-stat-label {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.game-btn-row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }
.game-btn {
  padding: 13px 28px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: 4px;
  cursor: pointer;
  min-height: 48px;
  transition: all 0.12s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  border: none;
}
.game-btn:active { transform: scale(0.97); }
.game-btn.primary { background: var(--navy); color: white; }
.game-btn.primary:hover { background: var(--accent); }
.game-btn.secondary { background: var(--ink); color: var(--paper); opacity: .75; }
.game-btn.secondary:hover { background: #1A6A78; }
.game-btn.ghost {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--navy);
}
.game-btn.ghost:hover { background: var(--cream-deep); }
.game-btn.small { padding: 8px 18px; font-size: 0.82rem; min-height: 38px; }
/* ─── GAME PLAY AREA ────────────────────────────────────────────── */
.game-play {
  background: white;
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 24px 20px;
  margin-top: 8px;
}
.game-mode-tag {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
}
.game-term {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 700;
  color: var(--navy);
  text-align: center;
  padding: 16px 0 8px;
  line-height: 1.2;
}
.game-prompt {
  font-style: italic;
  color: var(--muted-deep);
  text-align: center;
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.5;
}
/* the sentence completion gap */
.game-gap {
  border-bottom: 3px solid var(--accent);
  padding: 0 6px;
  margin: 0 2px;
  display: inline-block;
  min-width: 80px;
  color: var(--accent);
}

/* ─── OPTIONS ───────────────────────────────────────────────────── */
.game-options { display: flex; flex-direction: column; gap: 10px; margin: 16px 0; }
.game-option {
  width: 100%;
  padding: 14px 18px;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--navy);
  background: var(--offwhite);
  border: 1.5px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.12s;
  min-height: 52px;
  line-height: 1.4;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.game-option:active { transform: scale(0.99); }
.game-option:hover:not(:disabled) { background: var(--cream-deep); border-color: var(--navy); }
.game-option.correct { background: #F0F9F3; color: var(--green); border-color: var(--green); font-weight: 700; }
.game-option.wrong   { background: #FDF3F3; color: var(--red); border-color: var(--red); text-decoration: line-through; }
.game-option:disabled { cursor: default; opacity: 0.75; }
/* ─── FEEDBACK ──────────────────────────────────────────────────── */
.game-feedback {
  min-height: 28px;
  font-size: 0.98rem;
  font-weight: 700;
  text-align: center;
  padding: 4px 0;
  margin: 8px 0;
}
.game-feedback.correct { color: var(--green); }
.game-feedback.wrong   { color: var(--red); }
.game-example {
  font-style: italic;
  color: var(--muted-deep);
  font-size: 0.92rem;
  text-align: center;
  padding: 8px 0;
  line-height: 1.5;
  border-top: 1px solid var(--border-soft);
  margin-top: 8px;
}
/* ─── PROGRESS PANEL ────────────────────────────────────────────── */
.game-progress-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--border-soft);
  margin-top: 16px;
}
.game-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--cream-deep);
  border-radius: 3px;
  overflow: hidden;
}
.game-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.4s ease-out;
}
.game-progress-text {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.game-score-streak {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 6px;
}
.game-score-streak strong { color: var(--navy); }
/* ─── HELPER ROW ────────────────────────────────────────────────── */
.game-helpers { display: flex; justify-content: center; gap: 8px; margin: 12px 0 4px; }

/* ─── REFERENCE PANEL ───────────────────────────────────────────── */
.game-ref-panel {
  margin-top: 16px;
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  overflow: hidden;
}
.game-ref-head {
  padding: 10px 16px;
  background: var(--cream-deep);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--muted-deep);
  cursor: pointer;
  user-select: none;
}
.game-ref-body { padding: 12px 16px; display: none; }
.game-ref-body.open { display: block; }
.game-ref-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.88rem;
  line-height: 1.5;
}
.game-ref-item:last-child { border-bottom: none; }
.game-ref-item .ref-term { font-weight: 700; color: var(--navy); }
.game-ref-item .ref-def { color: var(--muted-deep); font-size: 0.85rem; }
.game-ref-item .ref-ex { font-style: italic; color: var(--muted); font-size: 0.82rem; margin-top: 2px; }

/* stage pip track per item */
.ref-stage-track { display: flex; gap: 3px; margin-top: 6px; }
.ref-stage-pip {
  width: 18px; height: 4px; border-radius: 2px;
  background: var(--cream-deep);
  transition: background 0.2s;
}
.ref-stage-pip.filled { background: var(--accent); }

/* ─── COMPLETION SCREEN ─────────────────────────────────────────── */
.game-completion {
  background: white;
  border: 1px solid var(--border-soft);
  border-top: 4px solid var(--green);
  border-radius: 4px;
  padding: 40px 24px;
  text-align: center;
  margin-top: 8px;
}
.game-completion h2 { font-size: 1.8rem; margin-bottom: 12px; }
.game-completion p { color: var(--muted-deep); margin-bottom: 8px; font-size: 0.95rem; }
/* ─── NOTIFICATION TOAST ────────────────────────────────────────── */
.game-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--navy);
  color: white;
  padding: 10px 20px;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  z-index: 200;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}
.game-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
/* ── Mobile nav overflow fix ── */
/* ── Responsive ── */
@media (max-width: 600px) {
  .game-card { margin: 0 10px; }
  .game-btn { padding: 12px 16px; font-size: 0.85rem; }
}

/* ── Chapter nav — card button style ─────────────────────────── */
.chapter-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  max-width: 800px;
  flex-wrap: wrap;
}
.chapter-nav::-webkit-scrollbar { display: none; }
.chapter-nav-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
}
.chapter-nav-btn {
  flex: 1 1 auto;
  min-width: 80px;
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  text-align: center;
  text-decoration: none;
  color: var(--muted);
  background: transparent;
  border: 1.5px solid var(--hairline);
  border-radius: 6px;
  transition: background .15s, color .15s, border-color .15s;
  white-space: nowrap;
  cursor: pointer;
  display: inline-block;
}
.chapter-nav-btn:hover {
  color: var(--ink);
  border-color: var(--ink);
}
.chapter-nav-btn.active {
  background: var(--navy);
  color: white;
  border-color: var(--navy);
}
@media (max-width: 480px) {
  .chapter-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
  }
  .chapter-nav-btn {
    flex-shrink: 0;
    font-size: 0.62rem;
    padding: 8px 10px;
    letter-spacing: 1px;
  }
}
@media (max-width: 380px) {
  .chapter-nav-btn { min-width: 60px; }
}

/* ── Mastery map (completion screen) ─────────────────────────────── */
#gMasteryMap {
  margin: 16px 0;
  text-align: left;
}
.mastery-group {
  margin-bottom: 14px;
}
.mastery-group-label {
  font-family: var(--font-sans);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.mastery-chip {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 700;
  margin: 3px 4px 3px 0;
}
.mastery-chip.strong    { background: rgba(46,125,82,.15);  color: var(--green); }
.mastery-chip.brittle   { background: rgba(184,134,11,.12); color: var(--amber); }
.mastery-chip.unmastered{ background: rgba(192,57,43,.10);  color: var(--red);   }

/* ── Brittle pip (mastered but with many misses) ─────────────────── */
.ref-stage-pip.filled-brittle {
  background: var(--amber) !important;
  border-color: var(--amber) !important;
  opacity: 0.6;
}

/* ── "I know this" button ─────────────────────────────────────────── */
.game-btn.know {
  background: transparent;
  border: 1.5px solid var(--amber);
  color: var(--amber);
  font-size: .65rem;
  padding: 6px 12px;
  letter-spacing: .5px;
}
.game-btn.know:hover {
  background: rgba(184,134,11,.1);
}

/* ── Streak fire indicator ────────────────────────────────────────── */
.streak-fire {
  display: inline-block;
  margin-left: 4px;
  font-size: .9rem;
}

/* ─── GAME CARD ACTIONS (hint / reveal / next) ──────────────────── */
.game-card-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
}
.game-card-actions .game-btn { min-width: 90px; }

/* Save & Exit — centred below the card */
#gBtnSaveQuit {
  display: block;
  margin: 14px auto 0;
  min-width: 140px;
}


#gBtnNext { min-width:120px;animation:nextBtnIn .2s ease-out; }
@keyframes nextBtnIn { from{opacity:0;transform:scale(.95)} to{opacity:1;transform:scale(1)} }

.game-stage-dots{display:flex;gap:6px;justify-content:center;margin-bottom:12px}
.game-stage-dot{width:8px;height:8px;border-radius:50%;background:var(--hairline);transition:background .25s}
.game-stage-dot.active{background:var(--amber)}
.game-stage-dot.done{background:var(--green,#27ae60)}


/* ══════════════════════════════════════════════════════════════════
   DARK MODE — GAME (Batch 21)
   ══════════════════════════════════════════════════════════════════ */

body.dark .game-start-card,
body.dark .game-card {
  background: #1A2230 !important;
  border-color: rgba(255,255,255,.1) !important;
  color: #F0F0F0 !important;
}
body.dark .game-card * { color: inherit !important; }
body.dark .game-start-title { color: #FFFFFF !important; }
body.dark .game-start-meta  { color: #98A8B8 !important; }
body.dark .game-term        { color: #FFFFFF !important; }
body.dark .game-prompt      { color: #E0E8F0 !important; }
body.dark .game-example     { color: #B8C8D8 !important; }
body.dark .game-feedback    { color: #F0F0F0 !important; }

body.dark .game-hud { color: #98A8B8 !important; }
body.dark .hud-val  { color: #FFFFFF !important; }

body.dark .game-options .opt-btn,
body.dark .game-btn {
  background: rgba(255,255,255,.08) !important;
  border-color: rgba(255,255,255,.2) !important;
  color: #F0F0F0 !important;
}
body.dark .game-options .opt-btn:hover,
body.dark .game-btn:hover {
  background: rgba(255,255,255,.15) !important;
  border-color: var(--amber) !important;
}
body.dark .game-options .opt-btn.correct {
  background: rgba(39,174,96,.25) !important;
  border-color: #4CAF82 !important;
  color: #A0E8B0 !important;
}
body.dark .game-options .opt-btn.wrong {
  background: rgba(192,57,43,.25) !important;
  border-color: #E05A4A !important;
  color: #FFA090 !important;
}
body.dark .game-btn.know {
  background: rgba(76,175,130,.15) !important;
  color: #4CAF82 !important;
  border-color: rgba(76,175,130,.4) !important;
}
body.dark .game-btn.primary {
  background: var(--amber) !important;
  color: #1A1A1A !important;
}

body.dark .game-ref-panel {
  background: #0D1520 !important;
  border-color: rgba(255,255,255,.08) !important;
}
body.dark .game-ref-head { color: var(--amber) !important; }

body.dark .game-completion {
  background: #1A2230 !important;
  color: #F0F0F0 !important;
}
body.dark .game-completion * { color: inherit !important; }
body.dark .game-completion h2 { color: #FFFFFF !important; }
body.dark .game-stat-val   { color: #FFFFFF !important; }
body.dark .game-stat-label { color: #98A8B8 !important; }

body.dark .typing-input {
  background: rgba(255,255,255,.08) !important;
  border-color: rgba(255,255,255,.25) !important;
  color: #FFFFFF !important;
}
body.dark .typing-input:focus { border-color: var(--amber) !important; }