*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-dark: #1a1a2e;
  --bg-medium: #16213e;
  --bg-card: #0f3460;
  --text-main: #e0e0e0;
  --text-bright: #ffffff;
  --text-soft: #8899aa;
  --green: #5B8731;
  --green-light: #7EC850;
  --brown: #8B6914;
  --gold: #FFD700;
  --diamond: #5DE5E5;
  --red: #e74c3c;
  --btn-primary: #2ecc71;
  --btn-primary-dark: #20a05a;
  --btn-secondary: #3498db;
  --btn-secondary-dark: #2074a8;
  --font-pixel: 'DotGothic16', monospace;
  --font-round: 'M PLUS Rounded 1c', sans-serif;
  --radius: 8px;
  --shadow: 0 4px 12px rgba(0,0,0,0.4);
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-round);
  background: var(--bg-dark);
  color: var(--text-main);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#app {
  max-width: 600px;
  margin: 0 auto;
  padding: 16px;
  padding-top: env(safe-area-inset-top, 16px);
  padding-bottom: calc(env(safe-area-inset-bottom, 16px) + 20px);
  position: relative;
}

#app.shake {
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.screen { animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ===== ホーム画面 ===== */
.home-header { text-align: center; padding: 24px 0 16px; }

.title-block {
  background: linear-gradient(180deg, var(--green-light) 0%, var(--green) 40%, var(--brown) 40%, var(--brown) 100%);
  border: 4px solid #333;
  border-radius: var(--radius);
  padding: 20px 16px;
  display: inline-block;
  image-rendering: pixelated;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.1), var(--shadow);
}

.game-title {
  font-family: var(--font-pixel);
  font-size: 1.8rem;
  color: var(--text-bright);
  text-shadow: 3px 3px 0 rgba(0,0,0,0.5);
  line-height: 1.4;
  letter-spacing: 2px;
}

.title-subtitle {
  font-family: var(--font-round);
  font-size: 1rem;
  color: var(--text-soft);
  margin-top: 12px;
}

.stat-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin: 16px 0;
}

.stat-box {
  background: var(--bg-medium);
  border: 2px solid #333;
  border-radius: var(--radius);
  padding: 12px 16px;
  text-align: center;
  flex: 1;
  max-width: 120px;
}

.stat-num {
  font-family: var(--font-pixel);
  font-size: 1.6rem;
  color: var(--gold);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-soft);
  margin-top: 4px;
}

.home-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  margin-top: 20px;
}

.home-sub-buttons {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 360px;
}

.home-sub-buttons .btn-secondary { flex: 1; }
.home-sub-buttons .btn-small { flex: 0 0 auto; padding: 12px 16px; }

/* ===== ボタン共通 ===== */
button {
  font-family: var(--font-round);
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
  -webkit-tap-highlight-color: transparent;
}

button:active {
  transform: translateY(2px) !important;
  box-shadow: none !important;
}

.btn-primary {
  background: var(--btn-primary);
  color: #fff;
  font-size: 1.1rem;
  padding: 16px 32px;
  border-radius: var(--radius);
  border-bottom: 4px solid var(--btn-primary-dark);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 360px;
}

.btn-primary:active { border-bottom-width: 2px; }

.btn-large { font-size: 1.3rem; padding: 20px 32px; }

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.95rem;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 2px solid #444;
  border-bottom: 4px solid #333;
}

.btn-danger {
  background: var(--red);
  color: #fff;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: var(--radius);
  border-bottom: 3px solid #a93226;
}

.btn-back {
  background: transparent;
  color: var(--text-soft);
  font-size: 0.9rem;
  padding: 8px 12px;
}

/* ===== 画面ヘッダ ===== */
.screen-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.screen-title {
  font-family: var(--font-pixel);
  font-size: 1.1rem;
  color: var(--text-bright);
  flex: 1;
}

/* ===== どうくつ選び ===== */
.cave-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.cave-card {
  background: var(--bg-medium);
  border: 2px solid #444;
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  border-bottom: 4px solid #333;
  transition: transform 0.15s;
}

.cave-card:active { transform: scale(0.96); }

.cave-block-icon {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  image-rendering: pixelated;
}

.cave-name {
  font-family: var(--font-pixel);
  font-size: 0.7rem;
  color: var(--text-bright);
}

.cave-chars {
  font-size: 1rem;
  color: var(--text-soft);
  letter-spacing: 3px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: #333;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--btn-primary), var(--diamond));
  border-radius: 4px;
  transition: width 0.5s ease;
}

.cave-progress {
  font-size: 0.7rem;
  color: var(--text-soft);
  font-family: var(--font-pixel);
}

/* ===== さいくつ画面 ===== */
.mine-instruction {
  font-size: 0.9rem;
  color: var(--text-soft);
  text-align: center;
  margin-bottom: 16px;
}

.mine-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  justify-items: center;
}

.mine-block {
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: var(--radius);
  transition: transform 0.15s;
}

.mine-block:active { transform: scale(0.9); }

.block-face {
  width: 80px;
  height: 80px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  image-rendering: pixelated;
  position: relative;
  box-shadow: var(--shadow);
}

.block-question {
  font-family: var(--font-pixel);
  font-size: 2rem;
  color: rgba(255,255,255,0.7);
}

.mined-face {
  background: var(--bg-medium);
  border: 2px dashed #555;
  color: var(--btn-primary);
  font-size: 1.8rem;
}

.block-char {
  font-size: 1.2rem;
  color: var(--text-soft);
  font-weight: 700;
}

.mine-block.mined .block-char { color: var(--btn-primary); }

/* ===== クイズ画面 ===== */
.quiz-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 10px 0;
}

.quiz-prompt {
  font-family: var(--font-pixel);
  font-size: 1rem;
  color: var(--gold);
  text-align: center;
}

.quiz-emoji {
  font-size: 5rem;
  line-height: 1.2;
  animation: bounce 1s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.quiz-word {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--text-bright);
  letter-spacing: 6px;
}

.quiz-fill-word {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-bright);
  letter-spacing: 8px;
  display: flex;
  gap: 4px;
  align-items: center;
}

.fill-blank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--bg-card);
  border: 3px dashed var(--gold);
  border-radius: var(--radius);
  color: var(--gold);
  font-family: var(--font-pixel);
  animation: pulse 1.5s ease infinite;
}

@keyframes pulse {
  0%, 100% { border-color: var(--gold); }
  50% { border-color: transparent; }
}

.fill-char { display: inline-block; }

.speak-btn {
  background: var(--bg-card);
  border: 3px solid var(--btn-secondary);
  border-radius: 50%;
  width: 120px;
  height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--text-bright);
  box-shadow: var(--shadow);
  animation: pulse-border 2s ease infinite;
}

@keyframes pulse-border {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52,152,219,0.4); }
  50% { box-shadow: 0 0 0 12px rgba(52,152,219,0); }
}

.speak-btn span {
  font-size: 0.7rem;
  margin-top: 4px;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
  max-width: 320px;
}

.option-btn {
  background: var(--bg-medium);
  border: 3px solid #555;
  border-bottom: 5px solid #444;
  border-radius: var(--radius);
  padding: 20px;
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-bright);
  min-height: 80px;
  transition: all 0.15s;
}

.option-btn:active { transform: scale(0.95); }
.option-btn:disabled { pointer-events: none; }

.option-btn.correct {
  background: var(--btn-primary) !important;
  border-color: var(--btn-primary-dark) !important;
  color: #fff !important;
  animation: correctPop 0.4s ease;
}

@keyframes correctPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.option-btn.wrong {
  background: var(--red) !important;
  border-color: #a93226 !important;
  color: #fff !important;
  animation: wrongShake 0.4s ease;
}

@keyframes wrongShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-10px); }
  40% { transform: translateX(10px); }
  60% { transform: translateX(-6px); }
  80% { transform: translateX(6px); }
}

.btn-trace-switch {
  margin-top: 8px;
  font-size: 0.85rem;
}

/* ===== なぞり ===== */
.trace-wrapper {
  position: relative;
  width: 280px;
  height: 280px;
  background: #fff;
  border-radius: var(--radius);
  border: 3px solid #555;
  overflow: hidden;
}

.trace-guide-char {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12rem;
  color: rgba(200, 200, 200, 0.35);
  font-weight: 900;
  pointer-events: none;
  line-height: 1;
}

.trace-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.trace-buttons {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 300px;
}

.trace-buttons button { flex: 1; }

/* ===== 結果画面 ===== */
.result-area {
  text-align: center;
  padding: 30px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.result-title {
  font-family: var(--font-pixel);
  font-size: 1.2rem;
}

.correct-title { color: var(--gold); }
.retry-title { color: var(--btn-secondary); }

.result-char {
  font-size: 5rem;
  font-weight: 900;
  color: var(--text-bright);
}

.result-word {
  font-size: 1.3rem;
  color: var(--text-soft);
}

.result-reward {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-medium);
  border: 2px solid var(--gold);
  border-radius: var(--radius);
  padding: 12px 20px;
  font-family: var(--font-pixel);
  font-size: 0.9rem;
  color: var(--gold);
}

.reward-block {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  image-rendering: pixelated;
}

.result-bonus {
  font-family: var(--font-pixel);
  font-size: 0.85rem;
  color: var(--diamond);
  animation: bounce 0.6s ease 2;
}

.result-streak {
  font-size: 0.9rem;
  color: var(--text-soft);
}

.result-hint {
  font-size: 1rem;
  color: var(--text-soft);
  background: var(--bg-medium);
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 2px solid #444;
}

.result-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 300px;
  margin-top: 10px;
}

/* ===== もちもの ===== */
.inventory-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.inv-item {
  background: var(--bg-medium);
  border: 2px solid #444;
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.inv-item.inv-empty { opacity: 0.35; }

.inv-block {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  image-rendering: pixelated;
  flex-shrink: 0;
}

.inv-name {
  font-size: 0.75rem;
  color: var(--text-soft);
  flex: 1;
}

.inv-count {
  font-family: var(--font-pixel);
  font-size: 1rem;
  color: var(--gold);
}

.inv-empty-msg {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-soft);
  padding: 40px 20px;
  font-size: 1rem;
}

/* ===== けんちく ===== */
.build-grid {
  display: grid;
  gap: 1px;
  background: #333;
  border: 3px solid #555;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 1;
  max-width: 400px;
  margin: 0 auto 16px;
}

.build-cell {
  background: var(--bg-dark);
  aspect-ratio: 1;
  cursor: pointer;
  transition: background 0.1s;
  image-rendering: pixelated;
}

.build-cell:hover { background: #2a2a4e; }
.build-cell.placed { cursor: pointer; }

.build-palette {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 10px;
  background: var(--bg-medium);
  border-radius: var(--radius);
  border: 2px solid #444;
}

.palette-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: 2px solid transparent;
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--text-soft);
  font-size: 0.75rem;
  font-family: var(--font-pixel);
}

.palette-block.selected {
  border-color: var(--gold);
  background: rgba(255, 215, 0, 0.1);
}

.palette-icon {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  image-rendering: pixelated;
}

.btn-mode-toggle {
  background: var(--bg-card);
  border: 2px solid #555;
  color: var(--text-main);
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 6px;
}

/* ===== せってい ===== */
.settings-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-medium);
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 2px solid #444;
  font-size: 1rem;
}

.setting-item input[type="checkbox"] {
  width: 24px;
  height: 24px;
  accent-color: var(--btn-primary);
}

/* ===== エフェクト ===== */
#effects-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 2px;
  animation: particleMove 0.6s ease-out forwards;
  image-rendering: pixelated;
}

@keyframes particleMove {
  0% { opacity: 1; transform: translate(0, 0); }
  100% { opacity: 0; transform: translate(var(--dx), var(--dy)); }
}

.floating-text {
  position: absolute;
  font-family: var(--font-pixel);
  font-size: 1.2rem;
  font-weight: bold;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.5);
  animation: floatUp 1s ease-out forwards;
  pointer-events: none;
  white-space: nowrap;
}

@keyframes floatUp {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-60px); }
}

/* ===== レスポンシブ ===== */
@media (min-width: 500px) {
  .mine-grid { grid-template-columns: repeat(5, 1fr); }
  .cave-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 360px) {
  .game-title { font-size: 1.4rem; }
  .quiz-emoji { font-size: 3.5rem; }
  .option-btn { padding: 14px; font-size: 1.8rem; }
  .block-face { width: 64px; height: 64px; }
  .cave-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
}