/* ===== リセット・ベーススタイル ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Arial", sans-serif;
  background: linear-gradient(135deg, #7dd3c0, #d4f1f4, #a8e6cf);
  display: box;
  min-height: 100vh;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

/* ===== ゲームコンテナ ===== */
#game-container {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  background: #e0f6ff;
  border: 2px solid #000000;
  box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.5);
}

/* ===== スタート画面 ===== */
#game-start {
  background: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1000;
  width: 100%;
}

#game-start .game-title {
  color: #000b26;
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 20px;
  text-align: center;
  letter-spacing: 2px;
  font-family: "Yuji Boku", serif;
}

.game-instructions {
  background: rgba(255, 255, 255, 0.95);
  padding: 25px;
  border-radius: 15px;
  margin-bottom: 10px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  max-width: 350px;
  margin-left: auto;
  margin-right: auto;
}

.game-instructions h2 {
  color: #ff6262;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 10px;
  text-align: center;
}

.instruction-text {
  color: #222;
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 10px;
  text-align: center;
}

/* ===== 難易度選択 ===== */
.difficulty-selector {
  background: rgba(255, 255, 255, 0.95);
  padding: 25px;
  border-radius: 15px;
  margin-bottom: 10px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  max-width: 350px;
  margin-left: auto;
  margin-right: auto;
}

.difficulty-selector h3 {
  color: #ff6262;
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 10px;
  text-align: center;
}

.difficulty-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
}

.difficulty-button {
  flex: 1;
  background: rgba(255, 255, 255, 0.8);
  border: 2px solid #ddd;
  border-radius: 10px;
  padding: 15px 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 80px;
}

.difficulty-button:hover {
  border-color: #2196f3;
  background: rgba(33, 150, 243, 0.1);
  transform: translateY(-2px);
}

.difficulty-button.active {
  border-color: #2196f3;
  background: rgba(33, 150, 243, 0.2);
  box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.difficulty-label {
  font-size: 16px;
  font-weight: bold;
  color: #333;
  margin-bottom: 5px;
}

.difficulty-desc {
  font-size: 12px;
  color: #666;
  text-align: center;
}

/* ===== ゲームオーバー画面 ===== */
#game-over {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.95);
  padding: 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  min-width: 280px;
}

#game-over .game-title {
  color: #ff444d;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 16px;
}

#game-over #final-score {
  color: #222;
  font-size: 14px;
  margin-bottom: 16px;
}

.difficulty-info {
  color: #666;
  font-size: 12px;
  margin-bottom: 15px;
  text-align: center;
}

/* ===== ゲームクリア画面 ===== */
#game-clear {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.95);
  padding: 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  min-width: 280px;
}

#game-clear .game-title {
  color: #da4f4f;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 16px;
}

/* ===== 共通要素 ===== */
#game-over p,
#game-start p,
#game-clear p {
  margin-bottom: 16px;
  color: #555;
  font-size: 16px;
}

#game-clear .celebration-message {
  margin-bottom: 20px;
}

.hidden {
  display: none;
}

/* ===== ボタンスタイル ===== */
.game-button {
  display: block;
  background: linear-gradient(135deg, #2196f3, #1976d2);
  color: white;
  border: none;
  padding: 15px 30px;
  font-size: 18px;
  font-weight: bold;
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: auto;
  min-width: 250px;
  box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.game-button:hover {
  background: linear-gradient(135deg, #1976d2, #1565c0);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
}

.game-button:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

#restart-button {
  background: linear-gradient(135deg, #ff6b6b, #ff5252);
}

#restart-button:hover {
  background: linear-gradient(135deg, #ff5252, #ff6b6b);
}

#play-again-button {
  background: linear-gradient(135deg, #2196f3, #1976d2);
}

#play-again-button:hover {
  background: linear-gradient(135deg, #1976d2, #1565c0);
}

.jump-button {
  position: absolute;
  bottom: 50px;
  left: 50px;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  border: none;
  background: #3281e2eb;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  outline: none;
  color: white;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  transition: all 0.25s ease;
  z-index: 1000;
}

.jump-button.active {
  transform: scale(0.9);
  box-shadow: 0px 0px 0px rgba(0, 0, 0, 0.3);
}

.jump-button.hidden {
  display: none;
}

/* ===== レスポンシブデザイン ===== */
/* モバイル対応 */
@media (max-width: 480px) {
  #game-container {
    max-width: 100%;
    padding: 5px;
  }

  #gameCanvas {
    border-width: 1px;
  }

  #game-over,
  #game-start {
    min-width: 250px;
    padding: 20px;
  }

  .game-instructions {
    padding: 20px;
    margin-bottom: 20px;
    max-width: 300px;
  }

  .game-instructions h2 {
    font-size: 18px;
  }

  .instruction-text {
    font-size: 14px;
  }

  .difficulty-selector {
    padding: 20px;
    margin-bottom: 30px;
    max-width: 300px;
  }

  .difficulty-selector h3 {
    font-size: 18px;
  }

  .difficulty-buttons {
    gap: 10px;
  }

  .difficulty-button {
    padding: 12px 8px;
    min-height: 70px;
  }

  .difficulty-label {
    font-size: 14px;
  }

  .difficulty-desc {
    font-size: 11px;
  }
}

/* パソコン向けのレスポンシブ対応 */
@media (min-width: 768px) {
  #game-container {
    max-width: 600px;
  }

  #gameCanvas {
    border-width: 3px;
  }

  .game-button {
    min-width: 300px;
    padding: 20px 40px;
    font-size: 20px;
  }

  .game-instructions {
    max-width: 500px;
    padding: 30px;
  }

  .game-instructions h2 {
    font-size: 24px;
  }

  .instruction-text {
    font-size: 16px;
  }

  .difficulty-selector {
    max-width: 500px;
    padding: 30px;
  }

  .difficulty-selector h3 {
    font-size: 22px;
  }

  .difficulty-buttons {
    gap: 20px;
  }

  .difficulty-button {
    padding: 20px 15px;
    min-height: 90px;
  }

  .difficulty-label {
    font-size: 18px;
  }

  .difficulty-desc {
    font-size: 14px;
  }
}