/* ===== リセット & ベース ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  background: #fffbe6;
  color: #333;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

/* ===== 画面管理 ===== */
.screen {
  display: none;
  position: fixed;
  inset: 0;
  overflow-y: auto;
}

.screen.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ===== スタート画面 ===== */
.start-container {
  text-align: center;
  padding: 20px;
}

.title {
  font-size: clamp(3rem, 12vw, 6rem);
  color: #ff6b9d;
  text-shadow: 3px 3px 0 #ffd1dc;
  line-height: 1.3;
  margin-bottom: 60px;
  letter-spacing: 0.1em;
}

.start-buttons {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
}

/* ===== ボタン ===== */
.btn {
  border: none;
  border-radius: 50px;
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  font-family: inherit;
  cursor: pointer;
  padding: 16px 48px;
  transition: transform 0.1s, box-shadow 0.1s;
  font-weight: bold;
  letter-spacing: 0.1em;
  min-width: 200px;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background: #ff6b9d;
  color: #fff;
  box-shadow: 0 4px 0 #d4527c;
}

.btn-primary:active {
  box-shadow: 0 2px 0 #d4527c;
  transform: translateY(2px) scale(0.98);
}

.btn-secondary {
  background: #7ec8e3;
  color: #fff;
  box-shadow: 0 4px 0 #5aa8c4;
}

.btn-secondary:active {
  box-shadow: 0 2px 0 #5aa8c4;
  transform: translateY(2px) scale(0.98);
}

.btn-clear {
  background: #aaa;
  color: #fff;
  box-shadow: 0 4px 0 #888;
  padding: 14px 32px;
}

.btn-confirm {
  background: #5cb85c;
  color: #fff;
  box-shadow: 0 4px 0 #449d44;
  padding: 14px 32px;
}

.btn-confirm.disabled {
  background: #ccc;
  box-shadow: 0 4px 0 #aaa;
  pointer-events: none;
}

.btn-line {
  background: #06c755;
  color: #fff;
  box-shadow: 0 4px 0 #05a847;
  padding: 14px 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-line:active {
  box-shadow: 0 2px 0 #05a847;
  transform: translateY(2px) scale(0.98);
}

.line-icon {
  width: 1.4em;
  height: 1.4em;
  flex-shrink: 0;
}

/* ===== ゲーム画面 ===== */
#screen-game.active {
  justify-content: center;
  padding: 16px;
  gap: 0;
}

.game-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 500px;
}

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-bottom: 20px;
}

.question-number {
  font-size: clamp(1.15rem, 4.5vw, 1.4rem);
  color: #888;
  font-weight: bold;
}

.score {
  font-size: clamp(1.15rem, 4.5vw, 1.4rem);
  color: #ff6b9d;
  font-weight: bold;
  background: #fff;
  padding: 8px 18px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.question-text {
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  text-align: center;
  color: #555;
  margin-bottom: 24px;
  line-height: 1.6;
  width: 100%;
  padding: 0 8px;
}

/* ===== 回答エリア ===== */
.answer-area {
  margin-bottom: 24px;
}

.answer-slots {
  display: flex;
  gap: 14px;
  justify-content: center;
}

.slot {
  width: clamp(60px, 18vw, 80px);
  height: clamp(60px, 18vw, 80px);
  border: 3px dashed #ffc0cb;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(2rem, 8vw, 2.8rem);
  background: #fff;
  transition: all 0.15s;
}

.slot.filled {
  border-style: solid;
  border-color: #ff6b9d;
  background: #fff0f5;
}

/* ===== 文字選択肢 ===== */
.choices {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  width: 100%;
  margin-bottom: 24px;
  padding: 0 8px;
}

.choice-btn {
  aspect-ratio: 1;
  border: 2px solid #ddd;
  border-radius: 14px;
  background: #fff;
  font-size: clamp(1.6rem, 6.5vw, 2.2rem);
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
  box-shadow: 0 3px 0 #ddd;
  color: #333;
  width: 100%;
}

.choice-btn:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #ddd;
}

.choice-btn.selected {
  background: #ffc0cb;
  border-color: #ff6b9d;
  color: #fff;
  box-shadow: 0 3px 0 #d4527c;
  pointer-events: none;
  opacity: 0.5;
}

/* ===== ゲームアクション ===== */
.game-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  width: 100%;
  padding: 0 8px;
}

/* ===== 結果画面（一問ごと） ===== */
.result-container {
  text-align: center;
  padding: 20px;
}

.result-icon {
  font-size: clamp(4rem, 20vw, 8rem);
  margin-bottom: 12px;
}

.result-label {
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: bold;
  margin-bottom: 20px;
}

.result-label.correct {
  color: #5cb85c;
}

.result-question {
  font-size: clamp(1.1rem, 4vw, 1.5rem);
  color: #888;
  margin-bottom: 8px;
}

.result-label.wrong {
  color: #e74c3c;
}

.result-answer {
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  color: #666;
  margin-bottom: 32px;
}

/* ===== 最終結果画面 ===== */
#screen-final.active {
  justify-content: center;
}

.final-container {
  text-align: center;
  padding: 20px;
  width: 100%;
  max-width: 500px;
}

.final-title {
  font-size: clamp(2rem, 8vw, 3rem);
  color: #ff6b9d;
  margin-bottom: 24px;
}

.final-score {
  font-size: clamp(3rem, 14vw, 6rem);
  font-weight: bold;
  color: #5cb85c;
  margin-bottom: 16px;
}

.final-detail {
  font-size: clamp(0.9rem, 3vw, 1.1rem);
  color: #888;
  text-align: left;
  background: #fff;
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 24px;
  max-height: 40vh;
  overflow-y: auto;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.final-detail-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: clamp(0.95rem, 3.2vw, 1.1rem);
}

.final-detail-row:last-child {
  border-bottom: none;
}

.final-detail-row .mark {
  font-size: 1.3em;
  flex-shrink: 0;
}

.final-tap {
  font-size: clamp(1rem, 3.5vw, 1.3rem);
  color: #aaa;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ===== きろく画面 ===== */
#screen-history.active,
#screen-history-detail.active {
  justify-content: flex-start;
  padding: 24px 16px;
}

.history-container {
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.history-title {
  font-size: clamp(1.8rem, 7vw, 2.5rem);
  color: #7ec8e3;
  margin-bottom: 8px;
}

.history-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 60vh;
  overflow-y: auto;
}

.history-item {
  background: #fff;
  border-radius: 16px;
  padding: 14px 18px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: transform 0.1s;
}

.history-item:active {
  transform: scale(0.98);
}

.history-item-date {
  font-size: clamp(0.8rem, 2.8vw, 0.95rem);
  color: #aaa;
}

.history-item-score {
  font-size: clamp(1.2rem, 4vw, 1.5rem);
  font-weight: bold;
  color: #ff6b9d;
}

.history-empty {
  text-align: center;
  color: #bbb;
  font-size: clamp(1rem, 3.5vw, 1.3rem);
  padding: 40px 0;
}

/* ===== きろく詳細 ===== */
.history-detail-content {
  width: 100%;
  background: #fff;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  max-height: 55vh;
  overflow-y: auto;
}

.detail-score-header {
  text-align: center;
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: bold;
  color: #ff6b9d;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid #f0f0f0;
}

.detail-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: clamp(0.85rem, 3vw, 1rem);
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-row .mark {
  font-size: 1.3em;
  flex-shrink: 0;
}

.detail-row .q-text {
  flex: 1;
  color: #666;
}

.detail-row .a-text {
  font-weight: bold;
  color: #333;
  flex-shrink: 0;
}

.history-detail-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== スマホ縦長レイアウト ===== */
@media (max-width: 480px) {
  .choices {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    padding: 0 16px;
  }

  .choice-btn {
    font-size: clamp(1.8rem, 7vw, 2.4rem);
    border-radius: 16px;
    box-shadow: 0 4px 0 #ddd;
  }

  .game-actions {
    flex-direction: row;
    gap: 12px;
    padding: 0 16px;
  }

  .game-actions .btn {
    flex: 1;
    min-width: 0;
    padding: 14px 0;
  }

  .question-text {
    margin-bottom: 20px;
  }

  .answer-area {
    margin-bottom: 20px;
  }
}

/* ===== PC・タブレット ===== */
@media (min-width: 768px) {
  .choices {
    gap: 14px;
    max-width: 400px;
  }
  .game-actions {
    gap: 24px;
  }
}

/* ===== 画面が短い場合 ===== */
@media (max-height: 600px) {
  .question-text {
    margin-bottom: 10px;
  }
  .answer-area {
    margin-bottom: 10px;
  }
  .choices {
    margin-bottom: 10px;
    gap: 6px;
  }
  .game-header {
    margin-bottom: 10px;
  }
}