/* ==========================================
   Dragon Digraph — Main Stylesheet
   ========================================== */

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

:root {
  --primary: #6c5ce7;
  --primary-light: #a29bfe;
  --accent: #fdcb6e;
  --success: #00b894;
  --danger: #d63031;
  --bg: #f8f9fd;
  --card: #ffffff;
  --text: #2d3436;
  --text-light: #636e72;
  --radius: 16px;
  --shadow: 0 4px 20px rgba(0,0,0,.08);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html { font-size: 20px; }

body {
  font-family: var(--font);
  background: url('../img/magic-dragon-world-background-free-vector.jpg') center/cover no-repeat fixed;
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---------- Screens ---------- */
.screen {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  padding: 1.5rem 1rem 3rem;
  min-height: 100vh;
  animation: fadeIn .3s ease;
}
.screen.active { display: flex; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Title / Play Screen ---------- */
.title-bg {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 100vh;
  width: 100%;
  background: linear-gradient(135deg, #dfe6e9 0%, #a29bfe 50%, #6c5ce7 100%);
  position: relative;
}
.title-dragon-svg {
  width: min(280px, 65vw);
  height: auto;
  filter: drop-shadow(0 8px 24px rgba(108,92,231,.35));
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
.title-name {
  font-size: 2.8rem;
  color: #fff;
  text-shadow: 0 3px 12px rgba(0,0,0,.25);
  margin: .6rem 0 1.4rem;
}
.btn-play {
  font-size: 1.5rem;
  padding: .9rem 3rem;
  border-radius: 50px;
  background: var(--accent);
  color: var(--text);
  box-shadow: 0 6px 24px rgba(253,203,110,.5);
  transition: transform .15s, box-shadow .15s;
}
.btn-play:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 30px rgba(253,203,110,.65);
}

/* ---------- Welcome ---------- */
.welcome-wrapper {
  text-align: center;
  margin-top: 15vh;
}
.logo-dragon {
  font-size: 5rem;
  animation: bounce 1.5s infinite;
}
@keyframes bounce {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-18px); }
}
.welcome-wrapper h1 {
  font-size: 2.6rem;
  color: var(--primary);
  margin: .4rem 0 .2rem;
}
.tagline {
  color: var(--text-light);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

/* ---------- Buttons ---------- */
.btn {
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-weight: 600;
  border-radius: var(--radius);
  transition: transform .15s, box-shadow .15s;
}
.btn:active { transform: scale(.96); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: .85rem 2.4rem;
  font-size: 1.15rem;
  box-shadow: 0 4px 14px rgba(108,92,231,.35);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(108,92,231,.45); }

.btn-small {
  background: var(--card);
  color: var(--primary);
  padding: .45rem 1rem;
  font-size: .85rem;
  box-shadow: var(--shadow);
}

.btn-listen {
  background: var(--accent);
  color: var(--text);
  padding: .65rem 1.6rem;
  font-size: 1rem;
  margin-bottom: .8rem;
}

.btn-speak {
  font-size: 1.2rem;
  padding: 1rem 2rem;
}
.btn-speak.recording {
  background: var(--danger);
  animation: pulse 1s infinite;
}
@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(214,48,49,.4); }
  50% { box-shadow: 0 0 0 14px rgba(214,48,49,0); }
}

/* ---------- Avatar selection ---------- */
.avatar-list {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2rem;
}
.avatar-card {
  background: var(--card);
  border: 3px solid transparent;
  border-radius: var(--radius);
  padding: 1.6rem 1.2rem;
  width: 170px;
  text-align: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: border-color .2s, transform .2s;
}
.avatar-card:hover { transform: translateY(-4px); }
.avatar-card.selected { border-color: var(--primary); }
.avatar-card .emoji { font-size: 3rem; }
.avatar-card h3 { margin: .5rem 0 .25rem; }
.avatar-card p { font-size: .78rem; color: var(--text-light); }

/* ---------- Top bar ---------- */
.topbar {
  width: 100%;
  max-width: 700px;
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: 1rem;
}
.topbar-avatar { font-size: 1.6rem; }
.topbar-name { font-weight: 700; }
.topbar-title { font-size: 1.2rem; flex: 1; text-align: center; }

/* ---------- Island chain ---------- */
.island-chain {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 600px;
  margin-top: 1.2rem;
  gap: 0;
}

/* zigzag rows */
.island-row {
  display: flex;
  width: 100%;
  justify-content: center;
}
.island-row.left  { justify-content: flex-start; padding-left: 6%; }
.island-row.right { justify-content: flex-end;   padding-right: 6%; }

/* chain connector between islands */
.chain-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 2px 0;
}
.chain-link {
  width: 22px;
  height: 14px;
  border: 3px solid #b8a9f0;
  border-radius: 50%;
  background: transparent;
}

/* island card */
.island-card {
  border-radius: 50%;
  width: 130px;
  height: 130px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 6px 28px rgba(0,0,0,.15);
  transition: transform .25s, box-shadow .25s;
  position: relative;
  border: 4px solid rgba(255,255,255,.55);
}
.island-card:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 32px rgba(0,0,0,.22);
}
.island-card.locked {
  opacity: .4;
  pointer-events: none;
  filter: grayscale(.5);
}
.island-card .icon { font-size: 2.2rem; line-height: 1; }
.island-card h3 { margin: .2rem 0 0; font-size: .8rem; }
.island-card .blend-label { font-weight: 800; font-size: 1.2rem; color: inherit; }
.island-card .lock-badge {
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: .9rem;
}
.island-card .check-badge {
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: 1rem;
}
.subtitle { color: var(--text-light); font-size: .95rem; margin-top: .2rem; }

/* ---------- Stage list ---------- */
.stage-list {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  gap: .8rem;
  margin-top: 1rem;
}
.stage-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .2s;
}
.stage-card:hover { transform: translateY(-2px); }
.stage-card.locked { opacity: .4; pointer-events: none; }
.stage-card .stage-icon { font-size: 1.8rem; }

/* Music toggle button */
.btn-music-toggle {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 9999;
  background: rgba(108, 92, 231, 0.85);
  border: none;
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  font-size: 1.3rem;
  cursor: pointer;
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  display: none;
}
.btn-music-toggle:hover { background: rgba(108, 92, 231, 1); }
.stage-card .stage-icon img { width: 2.5rem; height: 2.5rem; object-fit: contain; }
.topbar-icon { width: 1.5rem; height: 1.5rem; object-fit: contain; vertical-align: middle; margin-right: 0.25rem; }
.stage-card .stage-info h3 { font-size: 1rem; }
.stage-card .stage-info p { font-size: .78rem; color: var(--text-light); }
.stage-card .stage-status { margin-left: auto; font-size: 1.2rem; }

/* ---------- Game area ---------- */
.game-area {
  width: 100%;
  max-width: 550px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-top: .5rem;
}

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 10px;
  background: #dfe6e9;
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: .8rem;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 5px;
  transition: width .3s;
  width: 0;
}

.score-display { font-size: .9rem; color: var(--text-light); margin-bottom: .6rem; }

/* Big blend text */
.big-blend {
  font-size: 4rem;
  font-weight: 800;
  color: var(--primary);
  margin: .5rem 0;
}
.pronunciation { color: var(--text-light); font-style: italic; margin-bottom: 1rem; }

/* Listen words */
.listen-words {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  justify-content: center;
}
.listen-word-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: .9rem 1.2rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform .15s;
  text-align: center;
  min-width: 100px;
}
.listen-word-card:hover { transform: scale(1.05); }
.listen-word-card img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  display: block;
  margin: 0 auto .4rem;
}
.listen-word-card .word-label { font-weight: 700; font-size: 1.1rem; }
.listen-word-card .speak-icon { font-size: 1.4rem; margin-top: .3rem; }

/* Word prompt */
.word-prompt {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 2px;
  margin: 1rem 0;
  color: var(--text);
}
.word-prompt .blank {
  display: inline-block;
  border-bottom: 4px solid var(--primary);
  min-width: 60px;
  color: var(--primary);
}
.big-word { color: var(--primary); }

/* Quiz options */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .7rem;
  width: 100%;
  max-width: 340px;
}
.option-btn {
  background: var(--card);
  border: 3px solid #dfe6e9;
  border-radius: var(--radius);
  padding: .9rem;
  font-size: 1.3rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}
.option-btn:hover { border-color: var(--primary-light); }
.option-btn.correct { border-color: var(--success); background: #dff9f0; }
.option-btn.wrong { border-color: var(--danger); background: #ffe0e0; }

/* Drag & drop — picture beside blank */
.dd-picture-word-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
  width: 100%;
}
.dd-picture {
  width: 120px;
  height: 120px;
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}
.dd-picture img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.dd-picture .dd-picture-emoji {
  font-size: 3.5rem;
}
.dd-word-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.dropzone {
  width: 160px;
  height: 64px;
  border: 3px dashed var(--primary-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-light);
  transition: background .2s, border-color .2s;
}
.dropzone.hover { background: #f0edff; border-color: var(--primary); }

.dd-choices {
  display: flex;
  gap: .8rem;
  flex-wrap: wrap;
  justify-content: center;
}
.dd-chip {
  background: var(--card);
  border: 2px solid var(--primary-light);
  border-radius: 12px;
  padding: .6rem 1.4rem;
  font-size: 1.3rem;
  font-weight: 700;
  cursor: grab;
  user-select: none;
  transition: transform .15s, box-shadow .15s;
  box-shadow: var(--shadow);
}
.dd-chip:active { cursor: grabbing; transform: scale(1.08); }
.dd-chip.correct { border-color: var(--success); background: #dff9f0; }
.dd-chip.wrong { border-color: var(--danger); background: #ffe0e0; }

/* Feedback */
.feedback {
  margin-top: 1rem;
  font-size: 1.1rem;
  font-weight: 700;
  min-height: 1.5rem;
}
.feedback.correct { color: var(--success); }
.feedback.wrong { color: var(--danger); }

/* Speech */
.heard-text { margin-top: .6rem; color: var(--text-light); font-size: .95rem; min-height: 1.3rem; }
.warning { color: var(--danger); font-size: .85rem; }
.hidden { display: none !important; }

/* ---------- Complete screen ---------- */
.complete-wrapper {
  text-align: center;
  margin-top: 12vh;
}
.complete-icon { font-size: 4rem; margin-bottom: .6rem; }
.complete-wrapper h2 { font-size: 1.8rem; margin-bottom: .3rem; }
.complete-wrapper p { color: var(--text-light); margin-bottom: 1.5rem; }

.dragon-reward { margin-bottom: 1.5rem; }
.dragon-earned-label { font-size: 1.2rem; margin-bottom: .6rem; }
.earned-dragon {
  font-size: 4rem;
  animation: dragonPop .6s ease;
}
@keyframes dragonPop {
  0% { transform: scale(0) rotate(-20deg); opacity: 0; }
  60% { transform: scale(1.3) rotate(5deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); }
}

/* ---------- Dragon collection ---------- */
.dragon-collection {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 1rem;
  width: 100%;
  max-width: 700px;
  margin-top: 1rem;
}
.dragon-cell {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.dragon-cell.empty { opacity: .35; }
.dragon-cell .dragon-emoji { font-size: 2.8rem; }
.dragon-cell h4 { margin: .3rem 0 .1rem; font-size: .9rem; }
.dragon-cell p { font-size: .75rem; color: var(--text-light); }

/* ---------- Anki Card Review ---------- */
.anki-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  max-width: 400px;
  width: 100%;
  margin: 0 auto;
  transition: transform 0.4s ease;
}
.anki-card.flip { transform: rotateY(180deg); }
.anki-image { margin: 0 auto 1rem; }
.anki-image img { width: 120px; height: 120px; object-fit: contain; border-radius: var(--radius); }
.anki-front, .anki-back { text-align: center; }
.anki-back .big-blend { font-size: 2.5rem; margin: .5rem 0; }
.anki-btns {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1rem;
}
.btn-danger {
  background: var(--danger);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: .6rem 1.4rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
.btn-danger:hover { opacity: .85; }

/* ---------- Responsive ---------- */
@media (max-width: 500px) {
  html { font-size: 18px; }
  .island-card { width: 110px; height: 110px; }
  .island-row.left  { padding-left: 4%; }
  .island-row.right { padding-right: 4%; }
  .word-prompt { font-size: 2.2rem; }
  .big-blend { font-size: 3rem; }
  .avatar-card { width: 140px; padding: 1.2rem .8rem; }
}