/* ====== CSS Variables ====== */
:root {
  --bg: #FFF8E7;
  --card: #FFFFFF;
  --text: #333333;
  --text-sub: #888888;
  --primary: #FF6B6B;
  --primary-dark: #E05555;
  --secondary: #4ECDC4;
  --accent: #FFE66D;
  --success: #4CAF50;
  --fail: #F44336;
  --nav-bg: #FFFFFF;
  --shadow: 0 4px 16px rgba(0,0,0,0.10);
  --radius: 16px;
  --radius-sm: 10px;
  --col-kuku: #FF6B6B;
  --col-tashihiki: #4ECDC4;
  --col-kanji: #9C6FDE;
  --col-tani: #FF9800;
  --col-sansu: #4CAF50;
  --col-kokugo: #42A5F5;
  --col-eigo: #EC407A;
}

/* ====== Reset & Base ====== */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  width: 100%; height: 100%;
  font-family: 'Hiragino Maru Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  overflow: hidden;
  user-select: none;
}

/* ====== Screen System ====== */
.screen {
  position: fixed; inset: 0;
  display: none;
  flex-direction: column;
  background: var(--bg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.screen.active { display: flex; }

/* ====== Overlays ====== */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.overlay.hidden { display: none; }

.overlay-inline {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(0,0,0,0.85);
  z-index: 150;
  padding: 20px;
  text-align: center;
  border-radius: 24px 24px 0 0;
  display: block;
}
.overlay-inline.hidden { display: none; }

/* ====== Top Bar ====== */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--card);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  flex-shrink: 0;
}
.app-logo { font-size: 17px; font-weight: 800; color: var(--primary); }
.stat-chip {
  background: var(--accent);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 700;
  color: #555;
}

/* ====== Sub Header ====== */
.sub-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--card);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  flex-shrink: 0;
}
.sub-header h2 { font-size: 19px; color: var(--text); }
.zukan-count { font-size: 14px; color: var(--text-sub); font-weight: 700; }

/* ====== Partner Section ====== */
.partner-sec {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 16px 10px;
  background: linear-gradient(160deg, #FFFDE7 0%, #FFE0E0 100%);
  flex-shrink: 0;
}
.partner-svg-wrap {
  width: 120px; height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.partner-svg-wrap svg { width: 100%; height: 100%; animation: float 3s ease-in-out infinite; }
.partner-svg-wrap .mon-img { width: 120px; height: 120px; object-fit: contain; animation: float 3s ease-in-out infinite; }
.partner-info { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.partner-name { font-size: 20px; font-weight: 800; color: var(--text); }
.lv-badge {
  background: var(--primary); color: white;
  border-radius: 20px; padding: 2px 10px;
  font-size: 13px; font-weight: 700;
}
.xp-track {
  width: 180px; height: 10px;
  background: #E0E0E0; border-radius: 5px;
  margin-top: 7px; overflow: hidden;
}
.xp-fill {
  height: 100%;
  background: linear-gradient(90deg, #FFD700, #FF9800);
  border-radius: 5px;
  transition: width 0.6s ease;
}
.xp-label { font-size: 12px; color: var(--text-sub); margin-top: 3px; }

/* ====== Subjects Section ====== */
.subjects-sec { flex: 1; padding: 12px 14px; overflow-y: auto; }
.sec-h { font-size: 14px; color: var(--text); margin-bottom: 8px; font-weight: 700; }
.subjects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.subject-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 10px;
  display: flex; flex-direction: column;
  align-items: center; gap: 5px;
  cursor: pointer;
  box-shadow: var(--shadow);
  border-bottom: 4px solid transparent;
  transition: transform 0.12s;
}
.subject-card:active { transform: scale(0.96); }
.subject-icon { font-size: 26px; }
.subject-name { font-size: 13px; font-weight: 700; color: var(--text); }
.subject-best { font-size: 11px; color: var(--text-sub); font-weight: 600; }
.subject-card.kuku      { border-bottom-color: var(--col-kuku); }
.subject-card.tashihiki { border-bottom-color: var(--col-tashihiki); }
.subject-card.kanji     { border-bottom-color: var(--col-kanji); }
.subject-card.tani      { border-bottom-color: var(--col-tani); }
.subject-card.sansu     { border-bottom-color: var(--col-sansu); }
.subject-card.kokugo    { border-bottom-color: var(--col-kokugo); }
.subject-card.eigo      { border-bottom-color: var(--col-eigo); }

/* ====== Bottom Nav ====== */
.bottom-nav {
  display: flex;
  background: var(--nav-bg);
  border-top: 1px solid #EEEEEE;
  padding-bottom: env(safe-area-inset-bottom, 0);
  flex-shrink: 0;
}
.nav-btn {
  flex: 1; background: none; border: none;
  padding: 10px 0; font-size: 20px;
  cursor: pointer; color: #BBBBBB;
  transition: color 0.2s;
  display: flex; flex-direction: column;
  align-items: center; gap: 2px;
}
.nl { font-size: 9px; font-family: inherit; display: block; color: inherit; }
.nav-btn.active { color: var(--primary); }

/* ====== Starter Screen ====== */
.starter-wrap {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  min-height: 100vh; padding: 24px 16px;
  background: linear-gradient(160deg, #FFFDE7 0%, #F3E5F5 100%);
  gap: 20px;
}
.game-logo { font-size: 30px; font-weight: 900; color: var(--primary); text-align: center; }
.starter-sub { font-size: 17px; color: var(--text); text-align: center; margin-top: 4px; }
.starter-grid { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.starter-card {
  background: var(--card);
  border-radius: 20px; padding: 18px 14px;
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  cursor: pointer; box-shadow: var(--shadow);
  width: 105px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  border: 3px solid transparent;
}
.starter-card.selected {
  border-color: var(--primary);
  box-shadow: 0 8px 28px rgba(255,107,107,0.3);
  transform: scale(1.06);
}
.starter-card svg { width: 75px; height: 75px; }
.starter-mon-img { width: 90px; height: 90px; object-fit: contain; }
.starter-card-name { font-size: 14px; font-weight: 800; color: var(--text); }
.starter-card-type { font-size: 11px; color: var(--text-sub); }
.btn-starter-go {
  background: var(--primary); color: white;
  border: none; border-radius: 30px;
  padding: 14px 40px; font-size: 18px;
  font-weight: 800; cursor: pointer;
  box-shadow: 0 4px 18px rgba(255,107,107,0.4);
  transition: transform 0.15s;
  font-family: inherit;
}
.btn-starter-go:active { transform: scale(0.96); }

/* ====== Quiz Screen ====== */
.quiz-header {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--card);
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}
.back-btn {
  background: #F0F0F0; border: none; border-radius: 50%;
  width: 34px; height: 34px; font-size: 14px;
  cursor: pointer; display: flex;
  align-items: center; justify-content: center;
}
.quiz-subject-name { font-size: 16px; font-weight: 700; }
.quiz-progress-label { font-size: 14px; color: var(--text-sub); font-weight: 700; }
.quiz-progress-bar-wrap { height: 5px; background: #E8E8E8; flex-shrink: 0; }
.quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: width 0.35s ease;
}
.quiz-body { flex: 1; padding: 18px 14px; display: flex; flex-direction: column; gap: 14px; overflow-y: auto; }
.question-card {
  background: var(--card);
  border-radius: var(--radius); padding: 22px 18px;
  box-shadow: var(--shadow); min-height: 100px;
  display: flex; align-items: center; justify-content: center;
}
.question-text { font-size: 19px; font-weight: 700; line-height: 1.55; text-align: center; color: var(--text); }
.choices-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; }
.choice-btn {
  background: var(--card);
  border: 2px solid #E4E4E4;
  border-radius: var(--radius-sm);
  padding: 14px 8px; font-size: 15px;
  font-weight: 700; cursor: pointer;
  color: var(--text); font-family: inherit;
  line-height: 1.4; text-align: center;
  min-height: 58px; display: flex;
  align-items: center; justify-content: center;
  transition: transform 0.12s, background 0.2s, border-color 0.2s;
}
.choice-btn:active { transform: scale(0.95); }
.choice-btn.correct { background: var(--success); border-color: var(--success); color: white; }
.choice-btn.wrong { background: var(--fail); border-color: var(--fail); color: white; }
.choice-btn:disabled { pointer-events: none; opacity: 0.85; }

/* ====== Result Screen ====== */
.result-wrap {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; padding: 20px 18px;
  gap: 14px; overflow-y: auto;
  background: linear-gradient(160deg, #FFFDE7 0%, #FFE0E0 100%);
}
.result-title { font-size: 22px; font-weight: 800; }
.result-score-wrap { display: flex; align-items: center; gap: 14px; }
.result-score { font-size: 38px; font-weight: 800; color: var(--text); }
.result-rank {
  font-size: 26px; font-weight: 900;
  width: 56px; height: 56px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white; box-shadow: 0 4px 14px rgba(0,0,0,0.2);
}
.result-rank.rank-B { background: #90A4AE; }
.result-rank.rank-A { background: #66BB6A; }
.result-rank.rank-S { background: linear-gradient(135deg, #FFD700, #FF8C00); }
.result-xp { font-size: 22px; font-weight: 800; color: var(--primary); }
.result-partner-wrap { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.result-partner-svg { width: 80px; height: 80px; }
.result-partner-svg svg { width: 100%; height: 100%; }
.result-partner-svg .mon-img { width: 80px; height: 80px; object-fit: contain; }
.result-partner-msg { font-size: 14px; color: var(--text-sub); text-align: center; }
.result-unlock {
  background: var(--card); border-radius: var(--radius);
  padding: 14px; text-align: center;
  box-shadow: var(--shadow); width: 100%;
}
.unlock-label { font-size: 13px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.unlock-monster-svg { width: 65px; height: 65px; margin: 0 auto; }
.unlock-monster-svg svg { width: 100%; height: 100%; }
.unlock-monster-name { font-size: 15px; font-weight: 700; margin-top: 4px; }
.btn-result-home { width: 100%; max-width: 260px; }

/* ====== Buttons ====== */
.btn-primary {
  background: var(--primary); color: white;
  border: none; border-radius: 30px;
  padding: 14px 30px; font-size: 17px;
  font-weight: 800; cursor: pointer;
  font-family: inherit;
  transition: transform 0.15s;
  box-shadow: 0 4px 16px rgba(255,107,107,0.35);
}
.btn-primary:active { transform: scale(0.96); }
.btn-danger {
  background: #EF5350; color: white;
  border: none; border-radius: 12px;
  padding: 12px 22px; font-size: 14px;
  font-weight: 700; cursor: pointer;
  font-family: inherit; width: 100%;
  transition: transform 0.12s;
}
.btn-danger:active { transform: scale(0.97); }

/* ====== Monster Room ====== */
.partner-room-sec { padding: 14px; flex-shrink: 0; }
.collection-room-sec { flex: 1; padding: 0 14px 14px; overflow-y: auto; }
.room-sec-title { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.partner-room-card {
  background: linear-gradient(135deg, #FFFDE7, #FFE0E0);
  border-radius: var(--radius); padding: 16px;
  display: flex; align-items: center; gap: 14px;
  box-shadow: var(--shadow);
}
.partner-room-card svg { width: 75px; height: 75px; flex-shrink: 0; }
.partner-room-img { width: 90px; height: 90px; object-fit: contain; flex-shrink: 0; }
.partner-room-info { flex: 1; }
.partner-room-name { font-size: 19px; font-weight: 800; }
.partner-room-lv { font-size: 13px; color: var(--text-sub); margin-top: 2px; }
.partner-room-xp-track {
  height: 7px; background: #E0E0E0;
  border-radius: 4px; margin-top: 7px; overflow: hidden;
}
.partner-room-xp-fill {
  height: 100%;
  background: linear-gradient(90deg, #FFD700, #FF9800);
  border-radius: 4px;
}
.collection-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.collection-item {
  display: flex; flex-direction: column;
  align-items: center; gap: 3px;
  background: var(--card); border-radius: var(--radius-sm);
  padding: 8px 4px; box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}
.collection-item svg { width: 46px; height: 46px; }
.coll-img { width: 60px; height: 60px; object-fit: contain; }
.collection-item .c-name { font-size: 9px; text-align: center; color: var(--text); font-weight: 700; }
.collection-item .c-rank { font-size: 10px; font-weight: 800; }
.c-rank.rank-B { color: #90A4AE; }
.c-rank.rank-A { color: #66BB6A; }
.c-rank.rank-S { color: #FF8C00; }

/* ====== Zukan ====== */
.zukan-tabs {
  display: flex; overflow-x: auto;
  padding: 7px 10px; gap: 5px;
  background: var(--card); border-bottom: 1px solid #EEEEEE;
  flex-shrink: 0; scrollbar-width: none;
}
.zukan-tabs::-webkit-scrollbar { display: none; }
.zukan-tab {
  background: #F2F2F2; border: none;
  border-radius: 20px; padding: 5px 12px;
  font-size: 11px; font-weight: 700;
  white-space: nowrap; cursor: pointer;
  font-family: inherit; color: var(--text-sub);
  transition: all 0.2s;
}
.zukan-tab.active { background: var(--primary); color: white; }
.zukan-grid {
  flex: 1; display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px; padding: 14px;
  overflow-y: auto; align-content: start;
}
.zukan-item {
  background: var(--card); border-radius: var(--radius-sm);
  padding: 12px 6px; display: flex;
  flex-direction: column; align-items: center; gap: 5px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}
.zukan-item svg { width: 64px; height: 64px; }
.zukan-item.locked svg { filter: brightness(0) opacity(0.2); }
.zukan-img { width: 70px; height: 70px; object-fit: contain; }
.zukan-item.locked .zukan-img, .zukan-silhouette .zukan-img { filter: brightness(0) opacity(0.25); }
.zukan-item .z-name { font-size: 10px; font-weight: 700; text-align: center; }
.zukan-item.locked .z-name { color: #CCC; }
.zukan-item .z-rank {
  font-size: 10px; font-weight: 800;
  padding: 1px 7px; border-radius: 10px;
}
.zukan-item.rank-B .z-rank { background: #90A4AE22; color: #90A4AE; }
.zukan-item.rank-A .z-rank { background: #66BB6A22; color: #66BB6A; }
.zukan-item.rank-S .z-rank { background: #FFD70022; color: #FF8C00; }

/* ====== Settings ====== */
.settings-body { padding: 14px; display: flex; flex-direction: column; gap: 12px; flex: 1; overflow-y: auto; }
.settings-section {
  background: var(--card); border-radius: var(--radius);
  padding: 16px; display: flex;
  flex-direction: column; gap: 10px;
  box-shadow: var(--shadow);
}
.settings-section h3 { font-size: 13px; color: var(--text-sub); }
.settings-info { font-size: 13px; color: var(--text-sub); line-height: 1.6; }

/* ====== Evolution Overlay ====== */
.evo-content {
  background: var(--card); border-radius: 24px;
  padding: 28px 22px; text-align: center;
  width: 300px; position: relative; overflow: hidden;
  animation: evo-glow 1.5s ease infinite alternate;
}
.evo-title { font-size: 22px; font-weight: 900; color: var(--primary); margin-bottom: 16px; }
.evo-stage { display: flex; align-items: center; justify-content: center; gap: 10px; }
.evo-before, .evo-after { width: 85px; height: 85px; }
.evo-before svg, .evo-after svg { width: 100%; height: 100%; }
.evo-after svg { animation: evo-pop 0.5s ease 0.3s both; }
.evo-img { width: 90px; height: 90px; object-fit: contain; }
.evo-after .evo-img { animation: evo-pop 0.5s ease 0.3s both; }
.evo-arrow { font-size: 22px; color: var(--primary); animation: pulse 0.6s ease infinite; }
.evo-name { font-size: 20px; font-weight: 800; margin: 12px 0 4px; }
.evo-ok { margin-top: 10px; }
.evo-particles { position: absolute; inset: 0; pointer-events: none; }
.particle {
  position: absolute; width: 8px; height: 8px;
  border-radius: 50%; opacity: 0;
  animation: particle-fly 1.2s ease var(--delay) forwards;
}
@keyframes particle-fly {
  0% { transform: translate(0,0) scale(1); opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) scale(0); opacity: 0; }
}

/* ====== Unlock Overlay ====== */
.unlock-content {
  background: var(--card); border-radius: 24px;
  padding: 28px 22px; text-align: center; width: 270px;
}
.unlock-title { font-size: 20px; font-weight: 800; color: var(--primary); margin-bottom: 14px; }
.unlock-svg-wrap { width: 95px; height: 95px; margin: 0 auto 10px; }
.unlock-svg-wrap svg { width: 100%; height: 100%; animation: evo-pop 0.4s ease; }
.unlock-img { width: 95px; height: 95px; object-fit: contain; animation: evo-pop 0.4s ease; }
.unlock-name { font-size: 19px; font-weight: 800; margin-bottom: 4px; }
.unlock-rank-badge { font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.unlock-ok { width: 100%; }

/* ====== Answer Feedback ====== */
.answer-content { padding: 16px; }
.answer-icon { font-size: 52px; animation: pop 0.28s ease; }
.answer-text { font-size: 22px; font-weight: 800; color: white; margin-top: 6px; }
.answer-correct { font-size: 15px; color: rgba(255,255,255,0.8); margin-top: 4px; }

/* ====== Animations ====== */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
@keyframes pop {
  0% { transform: scale(0.4); opacity: 0; }
  70% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes evo-pop {
  0% { transform: scale(0) rotate(-15deg); opacity: 0; }
  70% { transform: scale(1.15) rotate(5deg); }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}
@keyframes evo-glow {
  0% { box-shadow: 0 0 0 rgba(255,215,0,0); }
  100% { box-shadow: 0 0 30px rgba(255,215,0,0.4); }
}
@keyframes correct-flash {
  0%, 100% { background: var(--bg); }
  50% { background: #E8F5E9; }
}
@keyframes wrong-flash {
  0%, 100% { background: var(--bg); }
  50% { background: #FFEBEE; }
}
.quiz-body.flash-correct { animation: correct-flash 0.4s ease; }
.quiz-body.flash-wrong { animation: wrong-flash 0.4s ease; }