/* =============================================
   ENGLISH EXPLORER — style.css
   ============================================= */

/* ---------- Google Fonts already linked via HTML ---------- */

/* ---------- CSS Variables ---------- */
:root {
  --red:    #FF6B6B;
  --teal:   #4ECDC4;
  --blue:   #45B7D1;
  --green:  #96CEB4;
  --yellow: #FFD93D;
  --purple: #DDA0DD;
  --orange: #FFB347;
  --pink:   #FF69B4;

  --bg:       #FFF9F0;
  --card-bg:  #FFFFFF;
  --dark:     #2D3436;
  --medium:   #636E72;
  --light-border: #E8E8E8;

  --font-h: 'Fredoka One', cursive;
  --font-b: 'Nunito', sans-serif;

  --shadow:   0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:0 8px 28px rgba(0,0,0,0.14);
  --radius:   20px;
  --radius-sm:12px;

  --top-h:  60px;
  --nav-h:  70px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; overflow: hidden; }
body {
  font-family: var(--font-b);
  background: var(--bg);
  color: var(--dark);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}
button { font-family: var(--font-b); border: none; outline: none; cursor: pointer; }
select { font-family: var(--font-b); }
input  { font-family: var(--font-b); }

/* ---------- Utility ---------- */
.hidden { display: none !important; }

/* ================================================
   TOP BAR
   ================================================ */
.top-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--top-h);
  background: var(--card-bg);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  display: flex;
  align-items: center;
  padding: 0 12px;
  z-index: 200;
  gap: 8px;
}
.top-home-btn {
  font-size: 26px;
  background: none;
  padding: 6px;
  border-radius: 50%;
  line-height: 1;
  flex-shrink: 0;
}
.top-home-btn:active { transform: scale(0.88); }
.top-title {
  flex: 1;
  font-family: var(--font-h);
  font-size: 18px;
  color: var(--dark);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.top-stars {
  font-family: var(--font-h);
  font-size: 18px;
  color: #E6A817;
  background: #FFFBEA;
  border: 2px solid #FFD93D;
  border-radius: 30px;
  padding: 4px 12px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ================================================
   SCREENS
   ================================================ */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s ease;
  background: var(--bg);
  overflow: hidden;
}
.screen.active {
  opacity: 1;
  pointer-events: all;
}

/* Scrollable inner content for non-home screens */
.screen-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding: calc(var(--top-h) + 12px) 16px calc(var(--nav-h) + 16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

/* ================================================
   HOME SCREEN
   ================================================ */
.home-wrap {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 30px;
  gap: 20px;
}
.home-hero {
  text-align: center;
  padding: 10px 0 4px;
}
.hero-globe { font-size: 64px; line-height: 1; margin-bottom: 8px; }
.hero-title {
  font-family: var(--font-h);
  font-size: 36px;
  background: linear-gradient(135deg, var(--red), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-greeting {
  font-size: 20px;
  font-weight: 700;
  color: var(--medium);
  margin-top: 6px;
}

/* Home Grid */
.home-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  width: 100%;
  max-width: 500px;
}
.home-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 18px 12px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  cursor: pointer;
  border-top: 5px solid var(--c, #FF6B6B);
  transition: transform 0.18s, box-shadow 0.18s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.home-card:active { transform: scale(0.94); box-shadow: 0 2px 8px rgba(0,0,0,0.10); }
.hc-emoji  { font-size: 38px; line-height: 1; }
.hc-title  { font-family: var(--font-h); font-size: 16px; color: var(--dark); }
.hc-desc   { font-size: 12px; color: var(--medium); font-weight: 600; }

/* Parent Hold Button */
.parent-hold-btn {
  background: linear-gradient(135deg, #636E72, #2D3436);
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 800;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 320px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-height: 64px;
}
.parent-hold-btn:active { transform: scale(0.97); }
.hold-bar-wrap { width: 100%; height: 6px; background: rgba(255,255,255,0.25); border-radius: 3px; overflow: hidden; }
.hold-bar-fill { height: 100%; width: 0%; background: var(--yellow); border-radius: 3px; transition: width 0.04s linear; }

/* Developer Contact Footer */
.dev-contact {
  font-size: 12px;
  color: var(--medium);
  text-align: center;
  padding: 4px 0 2px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 6px;
  opacity: 0.75;
}
.dev-contact a {
  color: var(--medium);
  text-decoration: underline;
  text-underline-offset: 2px;
  white-space: nowrap;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}
.dev-contact a:hover { color: var(--dark); }

/* ================================================
   COMMON ELEMENTS
   ================================================ */
.section-heading {
  font-family: var(--font-h);
  font-size: 26px;
  color: var(--dark);
  text-align: center;
}
.counter-pill {
  background: var(--card-bg);
  border: 2px solid var(--light-border);
  border-radius: 30px;
  padding: 4px 14px;
  font-size: 16px;
  font-weight: 800;
  color: var(--dark);
}
.arrow-btn {
  background: linear-gradient(135deg, var(--blue), #2196F3);
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 22px;
  font-size: 18px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-height: 52px;
  cursor: pointer;
  transition: transform 0.15s;
}
.arrow-btn:active { transform: scale(0.92); }

/* ================================================
   LEARN LETTERS SCREEN
   ================================================ */
.letter-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 360px;
}
.learned-pill {
  background: #FFFBEA;
  border: 2px solid var(--yellow);
  border-radius: 30px;
  padding: 4px 12px;
  font-size: 14px;
  font-weight: 700;
  color: #B7860B;
}
.letter-big-card {
  background: linear-gradient(135deg, #FFF5F5, #FFF0FD);
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  padding: 24px 40px;
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  max-width: 360px;
  justify-content: center;
}
.letter-upper-display {
  font-family: var(--font-h);
  font-size: 100px;
  color: var(--red);
  line-height: 1;
}
.letter-lower-display {
  font-family: var(--font-h);
  font-size: 70px;
  color: var(--purple);
  line-height: 1;
}

/* Example tiles */
.example-row {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 360px;
}
.example-tile {
  flex: 1;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 10px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s;
}
.example-tile:active { transform: scale(0.93); }
.ex-emoji { font-size: 36px; line-height: 1; }
.ex-word  { font-size: 18px; font-weight: 800; color: var(--dark); margin-top: 6px; }

/* Audio buttons */
.audio-btn-row {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 360px;
}
.audio-btn {
  flex: 1;
  border-radius: var(--radius);
  padding: 14px 8px;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  box-shadow: var(--shadow);
  min-height: 52px;
  transition: transform 0.15s;
}
.audio-btn:active { transform: scale(0.91); }
.audio-btn.red    { background: linear-gradient(135deg, var(--red), #e64444); }
.audio-btn.teal   { background: linear-gradient(135deg, var(--teal), #2bb0a8); }
.audio-btn.blue   { background: linear-gradient(135deg, var(--blue), #2196F3); }

/* Navigation row */
.nav-btn-row {
  display: flex;
  gap: 10px;
  align-items: center;
  width: 100%;
  max-width: 360px;
}
.autoplay-btn {
  flex: 1;
  background: linear-gradient(135deg, var(--green), #6ab489);
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 10px;
  font-size: 16px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-height: 52px;
  transition: transform 0.15s;
}
.autoplay-btn:active { transform: scale(0.92); }
.autoplay-btn.on { background: linear-gradient(135deg, var(--orange), #e08c30); }

/* Progress dots */
.progress-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  justify-content: center;
  width: 100%;
  max-width: 360px;
  padding: 4px 0;
}
.pdot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--light-border);
  transition: background 0.3s;
}
.pdot.done { background: var(--green); }
.pdot.current { background: var(--red); transform: scale(1.35); }

/* ================================================
   TRACE SCREEN
   ================================================ */
.trace-top-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
}
.trace-target-letter {
  font-family: var(--font-h);
  font-size: 72px;
  color: var(--red);
  line-height: 1;
}
.trace-msg {
  font-size: 18px;
  font-weight: 700;
  color: var(--medium);
}
.canvas-container {
  position: relative;
  width: min(300px, calc(100vw - 40px));
  height: min(300px, calc(100vw - 40px));
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  flex-shrink: 0;
}
#guide-canvas,
#draw-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
}
#guide-canvas { background: #FFFFF8; }
#draw-canvas  { background: transparent; }

/* Trace controls */
.trace-ctrl-row {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 340px;
  flex-wrap: wrap;
  justify-content: center;
}
.trace-btn {
  background: linear-gradient(135deg, var(--teal), #2bb0a8);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-height: 48px;
  transition: transform 0.15s;
}
.trace-btn:active { transform: scale(0.90); }
.trace-btn.active-guide { background: linear-gradient(135deg, var(--orange), #e08c30); }

/* Letter picker strip */
.trace-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  width: 100%;
  max-width: 360px;
}
.trace-pick-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 2px solid var(--light-border);
  font-family: var(--font-h);
  font-size: 20px;
  color: var(--dark);
  box-shadow: 0 2px 6px rgba(0,0,0,0.07);
  transition: transform 0.15s;
}
.trace-pick-btn:active { transform: scale(0.88); }
.trace-pick-btn.active-pick {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}

/* ================================================
   PHONICS SCREEN
   ================================================ */
.tab-bar {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 400px;
}
.tab-btn {
  flex: 1;
  background: var(--card-bg);
  border: 2px solid var(--light-border);
  border-radius: var(--radius);
  padding: 14px 8px;
  font-size: 15px;
  font-weight: 800;
  color: var(--medium);
  box-shadow: var(--shadow);
  min-height: 52px;
  transition: transform 0.15s, background 0.2s, color 0.2s;
}
.tab-btn:active { transform: scale(0.93); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--teal), #2bb0a8);
  color: #fff;
  border-color: var(--teal);
}
.tab-panel { display: none; flex-direction: column; align-items: center; gap: 14px; width: 100%; }
.tab-panel.active { display: flex; }
.tab-hint { font-size: 16px; font-weight: 700; color: var(--medium); text-align: center; }

/* Phonics grid */
.phonics-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  width: 100%;
  max-width: 360px;
}
.phonics-vowels-grid {
  grid-template-columns: repeat(5, 1fr);
  max-width: 280px;
}
.phonics-stage-label {
  font-family: var(--font-h);
  font-size: 16px;
  color: var(--medium);
  text-align: center;
  margin-top: 4px;
}
.phonics-ltr-btn.phonics-vowel {
  background: linear-gradient(135deg, #FFF5E0, #FFE5B4);
  border-color: var(--orange);
  color: #C07010;
}
.phonics-ltr-btn.phonics-cons {
  background: linear-gradient(135deg, #F0F8FF, #E0F0FF);
  border-color: var(--blue);
  color: #1565C0;
}
.phonics-ltr-btn {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 2px solid var(--light-border);
  font-family: var(--font-h);
  font-size: 22px;
  color: var(--dark);
  box-shadow: var(--shadow);
  transition: transform 0.15s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
}
.phonics-ltr-btn:active { transform: scale(0.85); }
.phonics-ltr-btn.popping {
  background: var(--yellow);
  transform: scale(1.15);
}

/* Blend tab */
.blend-word-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}
.blend-big-emoji { font-size: 72px; line-height: 1; }
.blend-parts-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  max-width: 360px;
}
.blend-part-btn {
  background: linear-gradient(135deg, var(--red), #e64444);
  color: #fff;
  border-radius: var(--radius);
  padding: 12px 16px;
  min-width: 68px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.blend-part-btn:active { transform: scale(0.90); }
.blend-part-letter { font-family: var(--font-h); font-size: 30px; line-height: 1; }
.blend-part-sound  { font-size: 13px; opacity: 0.9; }
.blend-plus { font-family: var(--font-h); font-size: 24px; color: var(--medium); }
.blend-action-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.blend-big-btn {
  background: linear-gradient(135deg, var(--teal), #2bb0a8);
  color: #fff;
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 20px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-height: 60px;
  transition: transform 0.15s;
}
.blend-big-btn:active { transform: scale(0.91); }
.blend-big-btn.secondary { background: linear-gradient(135deg, var(--purple), #c070c0); }

/* ================================================
   READ WORDS SCREEN
   ================================================ */
.level-btn-row {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 400px;
}
.level-btn {
  flex: 1;
  background: var(--card-bg);
  border: 2px solid var(--light-border);
  border-radius: var(--radius);
  padding: 10px 6px;
  font-size: 13px;
  font-weight: 800;
  color: var(--medium);
  box-shadow: var(--shadow);
  min-height: 60px;
  cursor: pointer;
  transition: transform 0.15s, background 0.2s;
  line-height: 1.4;
}
.level-btn small { font-size: 11px; opacity: 0.75; font-weight: 600; }
.level-btn:active { transform: scale(0.93); }
.level-btn.active {
  background: linear-gradient(135deg, var(--blue), #2196F3);
  color: #fff;
  border-color: var(--blue);
}

.read-word-card {
  background: var(--card-bg);
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  padding: 28px 24px 20px;
  text-align: center;
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.rw-emoji { font-size: 72px; line-height: 1; }
.rw-letters {
  display: flex;
  gap: 4px;
  justify-content: center;
  flex-wrap: wrap;
}
.rw-letter-btn {
  font-family: var(--font-h);
  font-size: 44px;
  color: var(--red);
  background: #FFF5F5;
  border: 3px solid var(--red);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
  line-height: 1;
  min-width: 52px;
  text-align: center;
}
.rw-letter-btn:active { transform: scale(0.88); background: var(--red); color: #fff; }
/* Sight-word sample sentence */
.rw-sentence {
  font-size: 18px;
  font-weight: 700;
  color: var(--purple);
  background: #F8F0FF;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  text-align: center;
  font-style: italic;
}

/* Family ending highlight on letter buttons */
.rw-letter-btn.rw-family-end {
  background: #FFF0E0;
  border-color: var(--orange);
  color: var(--orange);
}
.rw-letter-btn.rw-tapped {
  background: var(--red) !important;
  color: #fff !important;
  transform: scale(0.90);
}

.rw-family-tag {
  font-size: 16px;
  font-weight: 800;
  color: var(--purple);
  background: #F8F0FF;
  border-radius: 20px;
  padding: 4px 14px;
}

.word-ctrl-row {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 360px;
}
.word-ctrl-btn {
  flex: 1;
  background: linear-gradient(135deg, var(--blue), #2196F3);
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 10px;
  font-size: 16px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-height: 54px;
  transition: transform 0.15s;
}
.word-ctrl-btn:active { transform: scale(0.92); }
.word-ctrl-btn.primary { background: linear-gradient(135deg, var(--green), #6ab489); }
.word-nav-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ================================================
   GAME SCREEN
   ================================================ */
.game-selector { width: 100%; max-width: 400px; display: flex; flex-direction: column; align-items: center; gap: 16px; }
.game-select-grid { display: grid; grid-template-columns: 1fr; gap: 12px; width: 100%; }
.game-select-tile {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  border-left: 6px solid var(--teal);
  transition: transform 0.15s, box-shadow 0.15s;
}
.game-select-tile:nth-child(1) { border-color: var(--red); }
.game-select-tile:nth-child(2) { border-color: var(--teal); }
.game-select-tile:nth-child(3) { border-color: var(--purple); }
.game-select-tile:active { transform: scale(0.95); box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.gst-emoji { font-size: 40px; flex-shrink: 0; }
.gst-title { font-family: var(--font-h); font-size: 18px; color: var(--dark); }
.gst-desc  { font-size: 13px; color: var(--medium); font-weight: 600; margin-top: 2px; }

.game-active { width: 100%; max-width: 400px; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.game-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 10px 16px;
  box-shadow: var(--shadow);
}
.quit-game-btn {
  background: #FFE4E4;
  color: var(--red);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 800;
  transition: transform 0.15s;
}
.quit-game-btn:active { transform: scale(0.88); }
.game-score-chip {
  font-family: var(--font-h);
  font-size: 22px;
  color: #E6A817;
}
.lives-row { display: flex; gap: 4px; }
.life { font-size: 22px; transition: opacity 0.3s; }
.life.lost { opacity: 0.2; }

.question-box {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  text-align: center;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.question-text { font-family: var(--font-h); font-size: 22px; color: var(--dark); }
.hear-again-btn {
  background: linear-gradient(135deg, var(--blue), #2196F3);
  color: #fff;
  border-radius: var(--radius);
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 800;
  box-shadow: var(--shadow);
  transition: transform 0.15s;
}
.hear-again-btn:active { transform: scale(0.91); }

.answer-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}
.answer-btn {
  background: var(--card-bg);
  border: 3px solid var(--light-border);
  border-radius: var(--radius);
  padding: 16px 8px;
  font-family: var(--font-h);
  font-size: 32px;
  text-align: center;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.answer-btn:active { transform: scale(0.90); }
.answer-btn.correct { background: #DCFCE7; border-color: #22C55E; animation: correct-flash 0.4s ease; }
.answer-btn.wrong   { background: #FEE2E2; border-color: var(--red); animation: wrong-shake 0.4s ease; }
.answer-btn-label   { font-size: 14px; font-weight: 700; color: var(--medium); }

.game-feedback {
  font-family: var(--font-h);
  font-size: 26px;
  text-align: center;
  min-height: 44px;
  padding: 4px 0;
}

.game-over {
  width: 100%;
  max-width: 380px;
  background: var(--card-bg);
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  padding: 32px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.go-trophy { font-size: 72px; }
.go-title  { font-family: var(--font-h); font-size: 30px; color: var(--dark); }
.go-stars  { font-size: 20px; color: var(--medium); }
.go-btns   { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.go-btn {
  background: linear-gradient(135deg, var(--teal), #2bb0a8);
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 24px;
  font-size: 18px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-height: 54px;
  transition: transform 0.15s;
}
.go-btn:active { transform: scale(0.92); }
.go-btn.secondary { background: linear-gradient(135deg, #636E72, #2D3436); }

/* ================================================
   DAILY ADVENTURE SCREEN
   ================================================ */
.adventure-date {
  font-size: 16px;
  font-weight: 700;
  color: var(--medium);
  text-align: center;
}
.adventure-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 400px;
}
.adventure-step {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.3s;
  border-left: 5px solid var(--light-border);
}
.adventure-step:active { transform: scale(0.96); }
.adventure-step.step-done { opacity: 0.55; border-left-color: var(--green); }
.adventure-step.step-current { border-left-color: var(--red); box-shadow: 0 4px 18px rgba(255,107,107,0.22); }
.adv-step-emoji { font-size: 32px; flex-shrink: 0; }
.adv-step-label { font-family: var(--font-h); font-size: 18px; color: var(--dark); flex: 1; }
.adv-step-check { font-size: 24px; }

.adventure-complete {
  width: 100%;
  max-width: 380px;
  background: var(--card-bg);
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  padding: 32px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.ac-emoji { font-size: 72px; }
.adventure-complete h2 { font-family: var(--font-h); font-size: 28px; color: var(--dark); }
.adventure-complete p  { font-size: 16px; color: var(--medium); font-weight: 600; }

/* ================================================
   PARENT ZONE SCREEN
   ================================================ */
.parent-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 440px;
}
.parent-zone-title { font-family: var(--font-h); font-size: 26px; color: var(--dark); }
.close-btn {
  background: #FFE4E4;
  color: var(--red);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 800;
  transition: transform 0.15s;
}
.close-btn:active { transform: scale(0.88); }

.parent-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px 18px;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.parent-card h3 { font-family: var(--font-h); font-size: 20px; color: var(--dark); }
.parent-card.danger { align-items: center; }

.stat-row { display: flex; justify-content: space-between; align-items: center; }
.stat-label { font-size: 15px; font-weight: 700; color: var(--medium); }
.stat-val { font-size: 16px; font-weight: 800; color: var(--dark); }
.stat-bar { width: 100%; height: 10px; background: var(--light-border); border-radius: 5px; overflow: hidden; }
.stat-bar-fill { height: 100%; background: linear-gradient(90deg, var(--teal), var(--blue)); border-radius: 5px; transition: width 0.5s ease; }

/* Badges */
.badges-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.badge-tile {
  background: #F8F8F8;
  border-radius: var(--radius-sm);
  padding: 12px 10px;
  text-align: center;
  flex: 1;
  min-width: 90px;
  border: 2px solid var(--light-border);
  transition: border-color 0.3s, background 0.3s;
}
.badge-tile.unlocked { background: #FFFBEA; border-color: var(--yellow); }
.badge-icon { font-size: 32px; margin-bottom: 4px; }
.badge-name { font-size: 13px; font-weight: 800; color: var(--dark); }
.badge-req  { font-size: 11px; color: var(--medium); font-weight: 600; margin-top: 2px; }

/* Settings */
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.setting-label { font-size: 15px; font-weight: 700; color: var(--medium); }
.setting-select {
  background: #F5F5F5;
  border: 2px solid var(--light-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--dark);
  cursor: pointer;
}

/* Toggle switch */
.toggle { position: relative; display: inline-block; width: 52px; height: 28px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #CBD5E0;
  border-radius: 28px;
  transition: background 0.3s;
}
.toggle-track::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.3s;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.toggle input:checked + .toggle-track { background: var(--teal); }
.toggle input:checked + .toggle-track::before { transform: translateX(24px); }

/* Reset button */
.reset-btn {
  background: linear-gradient(135deg, var(--red), #e64444);
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 28px;
  font-size: 17px;
  font-weight: 800;
  box-shadow: var(--shadow);
  min-height: 54px;
  transition: transform 0.15s;
}
.reset-btn:active { transform: scale(0.92); }

/* ================================================
   BOTTOM NAVIGATION
   ================================================ */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--card-bg);
  box-shadow: 0 -2px 14px rgba(0,0,0,0.10);
  display: flex;
  align-items: stretch;
  z-index: 200;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  gap: 2px;
  padding: 6px 2px;
  cursor: pointer;
  position: relative;
  transition: background 0.2s;
  border-radius: 0;
}
.nav-item:active { background: rgba(0,0,0,0.05); }
.nav-item.active .ni-icon  { transform: scale(1.18); }
.nav-item.active .ni-label { color: var(--red); font-weight: 900; }
.ni-icon  { font-size: 22px; line-height: 1; transition: transform 0.2s; }
.ni-label { font-size: 9px; font-weight: 700; color: var(--medium); white-space: nowrap; }

/* Parent nav hold bar */
.parent-nav { overflow: hidden; }
.nav-hold-wrap {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: transparent;
}
.nav-hold-fill {
  height: 100%;
  width: 0%;
  background: var(--red);
  transition: width 0.04s linear;
}

/* ================================================
   OVERLAYS & REWARDS
   ================================================ */
.star-pop {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  font-family: var(--font-h);
  font-size: 48px;
  color: var(--yellow);
  text-shadow: 0 0 20px rgba(255,180,0,0.6);
  z-index: 999;
  pointer-events: none;
  animation: none;
}
.star-pop.popping { animation: star-pop-anim 0.8s ease forwards; }

.badge-popup {
  position: fixed;
  bottom: calc(var(--nav-h) + 16px);
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #2D3436, #636E72);
  color: #fff;
  border-radius: var(--radius);
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 800;
  box-shadow: var(--shadow-lg);
  text-align: center;
  z-index: 500;
  max-width: 320px;
  width: calc(100vw - 40px);
  animation: none;
}
.badge-popup.showing { animation: slide-up-fade 3s ease forwards; }

/* ================================================
   ANIMATIONS
   ================================================ */
@keyframes star-pop-anim {
  0%   { transform: translate(-50%,-50%) scale(0); opacity: 1; }
  40%  { transform: translate(-50%,-70%) scale(1.3); opacity: 1; }
  80%  { transform: translate(-50%,-90%) scale(1.0); opacity: 0.7; }
  100% { transform: translate(-50%,-110%) scale(0.8); opacity: 0; }
}

@keyframes slide-up-fade {
  0%   { opacity: 0; transform: translateX(-50%) translateY(20px); }
  15%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  80%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
}

@keyframes correct-flash {
  0%   { background: #DCFCE7; }
  50%  { background: #86EFAC; }
  100% { background: #DCFCE7; }
}

@keyframes wrong-shake {
  0%,100% { transform: translateX(0); }
  20%     { transform: translateX(-8px); }
  40%     { transform: translateX(8px); }
  60%     { transform: translateX(-6px); }
  80%     { transform: translateX(6px); }
}

@keyframes pulse-glow {
  0%,100% { box-shadow: 0 0 0 0 rgba(255,107,107,0.4); }
  50%      { box-shadow: 0 0 0 10px rgba(255,107,107,0); }
}

/* ================================================
   RESPONSIVE — wider screens
   ================================================ */
@media (min-width: 480px) {
  .home-grid { max-width: 520px; gap: 18px; }
  .hc-emoji  { font-size: 44px; }
  .hc-title  { font-size: 18px; }
  .phonics-grid { max-width: 400px; }
  .game-select-grid { grid-template-columns: 1fr 1fr 1fr; }
}
@media (min-width: 700px) {
  /* Adjusts layout variables for larger viewports. */
  :root { --top-h: 64px; --nav-h: 72px; }
  .letter-upper-display { font-size: 120px; }
  .letter-lower-display { font-size: 86px; }
  .blend-big-emoji { font-size: 90px; }
  .rw-emoji { font-size: 86px; }
  .rw-letter-btn { font-size: 52px; }
}

/* ================================================
   FULLSCREEN BUTTON
   ================================================ */
.fullscreen-btn {
  background: linear-gradient(135deg, #636E72, #2D3436);
  color: #fff;
  border-radius: var(--radius);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 800;
  box-shadow: var(--shadow);
  margin-top: 4px;
  transition: transform 0.15s;
}
.fullscreen-btn:active { transform: scale(0.93); }

/* ================================================
   SECONDARY RESET BUTTON
   ================================================ */
.reset-btn.secondary {
  background: linear-gradient(135deg, var(--blue), #2196F3);
  margin-top: 6px;
}

/* ================================================
   CONFETTI
   ================================================ */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 998;
  overflow: hidden;
}
.confetti-piece {
  position: absolute;
  top: -10px;
  animation: confetti-fall linear forwards;
}
@keyframes confetti-fall {
  0%   { transform: translateY(0) rotate(0deg);    opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* ================================================
   BEDTIME CALM MODE
   ================================================ */
body.bedtime-mode {
  --bg:      #1A1A2E;
  --card-bg: #16213E;
  --dark:    #E0E0F0;
  --medium:  #A0A0C0;
  --light-border: #2A2A4A;
}
body.bedtime-mode .top-bar,
body.bedtime-mode .bottom-nav {
  background: #16213E;
  box-shadow: none;
}
body.bedtime-mode .home-hero .hero-title {
  background: linear-gradient(135deg, #8BE8E8, #DDA0DD);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
body.bedtime-mode .home-card {
  background: #1E2A4A;
  border-top-color: #4A4A7A;
}
body.bedtime-mode .letter-big-card {
  background: linear-gradient(135deg, #1E2A4A, #251840);
}
body.bedtime-mode .read-word-card,
body.bedtime-mode .parent-card,
body.bedtime-mode .game-select-tile,
body.bedtime-mode .adventure-step,
body.bedtime-mode .question-box,
body.bedtime-mode .game-status-bar {
  background: #1E2A4A;
  border-color: #2A2A5A;
}

/* ================================================
   MODULE AD BANNER
   Shown on learning screens after a 60-second delay.
   Not shown on home or Parent Zone screens.
   See js/ad-config.js and js/ad-manager.js.
   ================================================ */
:root {
  --ad-h: 50px; /* height reserved for the ad banner */
}

#module-ad-wrap {
  position: fixed;
  bottom: var(--nav-h);
  left: 0;
  right: 0;
  height: var(--ad-h);
  z-index: 150;      /* above screen content (100), below overlays (200+) */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  background: var(--card-bg);
  border-top: 1px solid var(--light-border);
  /* Start invisible; animate in when .ad-visible is added */
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

#module-ad-wrap.ad-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Extra bottom padding added to .screen-scroll while the ad is showing */
body.ad-visible .screen-scroll {
  padding-bottom: calc(var(--nav-h) + var(--ad-h) + 16px);
}

/* Placeholder shown when ADS_ENABLED is false */
.ad-placeholder {
  width: 100%;
  max-width: 728px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #F5F5F5;
  border: 1px dashed #C8C8C8;
  border-radius: 4px;
}

.ad-placeholder-label {
  font-family: var(--font-b);
  font-size: 11px;
  color: #ABABAB;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
}

/* Bedtime mode: keep the ad bar dark */
body.bedtime-mode #module-ad-wrap {
  background: #16213E;
  border-top-color: #2A2A4A;
}
body.bedtime-mode .ad-placeholder {
  background: #1E2A4A;
  border-color: #3A3A6A;
}
body.bedtime-mode .ad-placeholder-label {
  color: #6060A0;
}

/* Responsive: bump ad height slightly on wide screens */
@media (min-width: 700px) {
  :root { --ad-h: 60px; }
}