* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

.app-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
  padding-bottom: 100px;
}

/* ヘッダー */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.header h1 {
  color: #00ff88;
  font-size: 1.8em;
  text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.help-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid #00ff88;
  background: transparent;
  color: #00ff88;
  font-size: 1.2em;
  font-weight: bold;
  cursor: pointer;
}

/* ステージ */
.stage {
  background: radial-gradient(circle at center, #1a3a2a 0%, #0a1a0a 100%);
  border-radius: 20px;
  padding: 30px;
  margin-bottom: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), inset 0 0 50px rgba(0, 255, 136, 0.1);
}

/* 虫キャラクター */
.mushi-character {
  position: relative;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.mushi-body {
  width: 120px;
  height: 100px;
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  border-radius: 60px 60px 40px 40px;
  position: relative;
  box-shadow: 0 10px 30px rgba(0, 255, 136, 0.4);
}

.mushi-character.rapping .mushi-body {
  animation: bounce 0.2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.9); }
}

.mushi-eyes {
  position: absolute;
  top: 25px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 30px;
}

.eye {
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  position: relative;
}

.eye::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  background: #1a1a2e;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.mushi-mouth {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 15px;
  background: #1a1a2e;
  border-radius: 0 0 20px 20px;
  transition: all 0.1s;
}

.mushi-character.rapping .mushi-mouth {
  height: 25px;
  width: 40px;
  animation: talk 0.15s ease-in-out infinite;
}

@keyframes talk {
  0%, 100% { height: 20px; width: 30px; }
  50% { height: 30px; width: 35px; }
}

.mushi-legs {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: -5px;
}

.leg {
  width: 8px;
  height: 20px;
  background: #00cc6a;
  border-radius: 4px;
}

/* 現在のフレーズ */
.current-phrase {
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  border-radius: 15px;
  padding: 15px;
  margin-bottom: 20px;
  text-align: center;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#currentText {
  color: #1a1a2e;
  font-size: 1.3em;
  font-weight: bold;
}

/* ラップパッド */
.rap-pads {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.rap-pad {
  aspect-ratio: 1;
  border: none;
  border-radius: 15px;
  background: linear-gradient(135deg, #2a2a4e 0%, #1a1a2e 100%);
  color: #00ff88;
  font-size: 0.9em;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.1s;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.rap-pad::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, rgba(0, 255, 136, 0.3) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.1s;
}

.rap-pad:active {
  transform: scale(0.95);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.rap-pad:active::before {
  opacity: 1;
}

.rap-pad.playing {
  animation: padGlow 0.3s ease-out;
}

@keyframes padGlow {
  0% {
    background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
    color: #1a1a2e;
    transform: scale(1.05);
  }
  100% {
    background: linear-gradient(135deg, #2a2a4e 0%, #1a1a2e 100%);
    color: #00ff88;
    transform: scale(1);
  }
}

.pad-label {
  position: relative;
  z-index: 1;
}

/* コントロール */
.controls {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 20px;
}

.control-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 15px 20px;
  border: none;
  border-radius: 15px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.control-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.control-btn.record {
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a5a 100%);
  color: white;
}

.control-btn.record.recording {
  animation: recording 1s ease-in-out infinite;
}

@keyframes recording {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 107, 0.7); }
  50% { box-shadow: 0 0 0 10px rgba(255, 107, 107, 0); }
}

.control-btn.play {
  background: linear-gradient(135deg, #4ecdc4 0%, #44a08d 100%);
  color: white;
}

.control-btn.play.playing {
  animation: playing 0.5s ease-in-out infinite;
}

@keyframes playing {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.control-btn.clear {
  background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
  color: white;
}

.control-btn:active:not(:disabled) {
  transform: scale(0.95);
}

.btn-icon {
  font-size: 1.5em;
}

.btn-text {
  font-size: 0.8em;
  font-weight: bold;
}

/* 履歴 */
.history {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 15px;
  padding: 15px;
  margin-bottom: 20px;
}

.history h3 {
  color: #00ff88;
  font-size: 1em;
  margin-bottom: 10px;
}

.history-list {
  max-height: 150px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  margin-bottom: 5px;
}

.history-phrase {
  color: #ccc;
  font-size: 0.9em;
}

.history-time {
  color: #888;
  font-size: 0.7em;
}

.empty {
  color: #666;
  text-align: center;
  padding: 20px;
}

/* ローディング表示 */
.loading-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(0, 255, 136, 0.2);
  border-top-color: #00ff88;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  margin-top: 20px;
  color: #00ff88;
  font-size: 1.2em;
  font-weight: bold;
}

.loading-subtext {
  margin-top: 10px;
  color: #888;
  font-size: 0.9em;
}

/* パッドのローディング状態 */
.rap-pad:not(.loaded) {
  opacity: 0.6;
  cursor: wait;
}

.rap-pad.loaded {
  opacity: 1;
}

/* 音量メーター */
.volume-meter {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 10px 20px;
  background: rgba(0, 0, 0, 0.8);
}

.volume-bar-bg {
  height: 8px;
  background: #333;
  border-radius: 4px;
  overflow: hidden;
}

.volume-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #00ff88, #00cc6a);
  transition: width 0.05s;
}

/* モーダル */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border-radius: 20px;
  padding: 30px;
  max-width: 400px;
  width: 100%;
  border: 2px solid #00ff88;
}

.modal-content h2 {
  color: #00ff88;
  text-align: center;
  margin-bottom: 20px;
}

.modal-content ol {
  color: #ccc;
  line-height: 2;
  margin-bottom: 20px;
  padding-left: 20px;
}

.modal-content .note {
  color: #888;
  font-size: 0.8em;
  text-align: center;
  margin-bottom: 20px;
}

.close-btn {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  color: #1a1a2e;
  font-size: 1em;
  font-weight: bold;
  cursor: pointer;
}

/* スタート画面 */
.start-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.start-content {
  text-align: center;
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.start-title {
  font-size: 3em;
  color: #00ff88;
  text-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
  margin-bottom: 10px;
}

.start-subtitle {
  font-size: 1.2em;
  color: #888;
  margin-bottom: 40px;
}

.start-btn {
  padding: 20px 60px;
  border: none;
  border-radius: 50px;
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  color: #1a1a2e;
  font-size: 1.5em;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 10px 30px rgba(0, 255, 136, 0.3);
}

.start-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(0, 255, 136, 0.5);
}

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

.start-btn-text {
  display: block;
}

/* レスポンシブ */
@media (max-width: 480px) {
  .rap-pads {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }

  .rap-pad {
    font-size: 0.8em;
  }

  .control-btn {
    padding: 12px 15px;
  }

  .header h1 {
    font-size: 1.5em;
  }
}