/* ============================
   Neon Motion Drum - 霓虹動態鼓機
   Cyberpunk Style CSS
   ============================ */

:root {
  --neon-cyan: #00fff5;
  --neon-pink: #ff00ff;
  --neon-yellow: #ffff00;
  --neon-green: #39ff14;
  --neon-orange: #ff6600;
  --bg-dark: #0a0a0f;
  --bg-darker: #050508;
  --grid-border: rgba(0, 255, 245, 0.3);
  --text-dim: rgba(255, 255, 255, 0.6);
}

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

body {
  font-family: 'Courier New', monospace;
  background: var(--bg-dark);
  color: white;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
}

/* ============================
   開始畫面
   ============================ */
#start-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-darker);
  z-index: 1000;
}

.start-content {
  text-align: center;
}

.neon-title {
  font-size: clamp(3rem, 12vw, 6rem);
  font-weight: bold;
  color: var(--neon-cyan);
  text-shadow:
    0 0 10px var(--neon-cyan),
    0 0 20px var(--neon-cyan),
    0 0 40px var(--neon-cyan),
    0 0 80px var(--neon-cyan);
  letter-spacing: 0.2em;
  animation: flicker 3s infinite alternate;
}

@keyframes flicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
    text-shadow:
      0 0 10px var(--neon-cyan),
      0 0 20px var(--neon-cyan),
      0 0 40px var(--neon-cyan),
      0 0 80px var(--neon-cyan);
  }
  20%, 24%, 55% {
    text-shadow: none;
  }
}

.subtitle {
  font-size: 1.2rem;
  color: var(--neon-pink);
  margin-top: 0.5rem;
  text-shadow: 0 0 10px var(--neon-pink);
}

.instruction {
  font-size: 1rem;
  color: var(--text-dim);
  margin-top: 2rem;
}

#start-btn {
  margin-top: 2rem;
  padding: 1rem 3rem;
  font-size: 1.5rem;
  font-family: inherit;
  font-weight: bold;
  color: var(--bg-dark);
  background: var(--neon-cyan);
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all 0.3s ease;
  box-shadow:
    0 0 20px var(--neon-cyan),
    inset 0 0 20px rgba(255, 255, 255, 0.3);
}

#start-btn:hover {
  background: var(--neon-pink);
  box-shadow:
    0 0 30px var(--neon-pink),
    0 0 60px var(--neon-pink),
    inset 0 0 20px rgba(255, 255, 255, 0.5);
  transform: scale(1.05);
}

#start-btn:active {
  transform: scale(0.98);
}

.hint {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 1rem;
}

/* ============================
   主遊戲區
   ============================ */
#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

#game-container.hidden {
  display: none;
}

/* Webcam 影片 */
#webcam {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 水平翻轉 (鏡像) */
  transform: scaleX(-1);
  /* 賽博龐克濾鏡 */
  filter: grayscale(70%) contrast(1.2) brightness(0.8);
}

/* 隱藏的偵測 canvas */
#detection-canvas {
  display: none;
}

/* Debug canvas */
#debug-canvas {
  position: fixed;
  bottom: 80px;
  left: 10px;
  width: 160px;
  height: 120px;
  border: 2px solid var(--neon-green);
  background: black;
  z-index: 500;
  image-rendering: pixelated;
}

#debug-canvas.hidden {
  display: none;
}

/* ============================
   3x3 霓虹格線
   ============================ */
#grid-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 4px;
  padding: 4px;
  pointer-events: none;
}

.cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--grid-border);
  background: rgba(0, 255, 245, 0.03);
  transition: all 0.1s ease;
  pointer-events: auto;
  cursor: pointer;
}

.cell-label {
  font-size: clamp(1rem, 4vw, 2rem);
  font-weight: bold;
  color: rgba(255, 255, 255, 0.3);
  text-shadow: 0 0 5px rgba(0, 255, 245, 0.3);
  user-select: none;
}

/* 觸發狀態 */
.cell.triggered {
  border-color: var(--neon-cyan);
  background: rgba(0, 255, 245, 0.2);
  box-shadow:
    0 0 20px var(--neon-cyan),
    0 0 40px var(--neon-cyan),
    inset 0 0 30px rgba(0, 255, 245, 0.3);
  animation: pulse 0.15s ease-out;
}

.cell.triggered .cell-label {
  color: var(--neon-cyan);
  text-shadow:
    0 0 10px var(--neon-cyan),
    0 0 20px var(--neon-cyan);
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

/* 不同格子不同顏色 (觸發時) */
.cell[data-sound="kick"].triggered {
  border-color: var(--neon-pink);
  background: rgba(255, 0, 255, 0.2);
  box-shadow:
    0 0 20px var(--neon-pink),
    0 0 40px var(--neon-pink),
    inset 0 0 30px rgba(255, 0, 255, 0.3);
}
.cell[data-sound="kick"].triggered .cell-label {
  color: var(--neon-pink);
  text-shadow: 0 0 10px var(--neon-pink), 0 0 20px var(--neon-pink);
}

.cell[data-sound="snare"].triggered {
  border-color: var(--neon-yellow);
  background: rgba(255, 255, 0, 0.15);
  box-shadow:
    0 0 20px var(--neon-yellow),
    0 0 40px var(--neon-yellow),
    inset 0 0 30px rgba(255, 255, 0, 0.2);
}
.cell[data-sound="snare"].triggered .cell-label {
  color: var(--neon-yellow);
  text-shadow: 0 0 10px var(--neon-yellow), 0 0 20px var(--neon-yellow);
}

.cell[data-sound="clap"].triggered {
  border-color: var(--neon-orange);
  background: rgba(255, 102, 0, 0.2);
  box-shadow:
    0 0 20px var(--neon-orange),
    0 0 40px var(--neon-orange),
    inset 0 0 30px rgba(255, 102, 0, 0.3);
}
.cell[data-sound="clap"].triggered .cell-label {
  color: var(--neon-orange);
  text-shadow: 0 0 10px var(--neon-orange), 0 0 20px var(--neon-orange);
}

.cell[data-sound="synth"].triggered {
  border-color: var(--neon-green);
  background: rgba(57, 255, 20, 0.15);
  box-shadow:
    0 0 20px var(--neon-green),
    0 0 40px var(--neon-green),
    inset 0 0 30px rgba(57, 255, 20, 0.2);
}
.cell[data-sound="synth"].triggered .cell-label {
  color: var(--neon-green);
  text-shadow: 0 0 10px var(--neon-green), 0 0 20px var(--neon-green);
}

/* 手動點擊時也可觸發 */
.cell:active {
  background: rgba(0, 255, 245, 0.15);
}

/* ============================
   控制面板
   ============================ */
#controls {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--grid-border);
  z-index: 100;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.control-group label {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.control-group input[type="range"] {
  width: 100px;
  accent-color: var(--neon-cyan);
}

.control-group span {
  font-size: 0.8rem;
  color: var(--neon-cyan);
  min-width: 2.5rem;
}

.btn-small {
  padding: 0.4rem 0.8rem;
  font-size: 0.75rem;
  font-family: inherit;
  color: var(--neon-green);
  background: transparent;
  border: 1px solid var(--neon-green);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-small:hover {
  background: rgba(57, 255, 20, 0.2);
  box-shadow: 0 0 10px var(--neon-green);
}

.btn-small.active {
  background: var(--neon-green);
  color: var(--bg-dark);
}

/* ============================
   狀態訊息
   ============================ */
#status {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  color: var(--neon-cyan);
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--grid-border);
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 200;
}

#status.visible {
  opacity: 1;
}

#status.error {
  color: #ff4444;
  border-color: #ff4444;
}

/* ============================
   RWD 響應式
   ============================ */
@media (max-width: 600px) {
  #controls {
    flex-wrap: wrap;
    gap: 0.8rem;
  }

  .control-group input[type="range"] {
    width: 80px;
  }

  .neon-title {
    letter-spacing: 0.1em;
  }
}

/* ============================
   隱藏類別
   ============================ */
.hidden {
  display: none !important;
}