:root {
  --neon-blue: #38bdf8;
  --neon-pink: #f472b6;
  --neon-purple: #a78bfa;
  --neon-yellow: #facc15;
  --neon-red: #ef4444;
  --bg-dark: #050510;
  --panel-bg: rgba(15, 23, 42, 0.85);
}

/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg-dark);
  color: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* 动态电子网格背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(56, 189, 248, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: gridScroll 4s linear infinite;
  pointer-events: none;
  z-index: -1;
}

@keyframes gridScroll {
  from { transform: translateY(0); }
  to { transform: translateY(40px); }
}

#app {
  position: relative;
  width: 100%;
  height: 100%;
}

/* 通用界面层 */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
  text-align: center;
  padding: 20px;
}

.hidden {
  display: none !important;
}

/* 霓虹标题 */
.neon-title {
  font-size: 3.2rem;
  font-weight: bold;
  color: var(--neon-blue);
  text-shadow:
    0 0 10px rgba(56, 189, 248, 0.8),
    0 0 30px rgba(56, 189, 248, 0.5),
    0 0 60px rgba(56, 189, 248, 0.3);
  animation: titleGlow 2s ease-in-out infinite alternate;
}

@keyframes titleGlow {
  from { text-shadow: 0 0 10px rgba(56,189,248,0.8), 0 0 30px rgba(56,189,248,0.5); }
  to { text-shadow: 0 0 20px rgba(244,114,182,0.9), 0 0 50px rgba(244,114,182,0.5); }
}

.neon-heading {
  font-size: 2.2rem;
  color: var(--neon-pink);
  text-shadow: 0 0 12px rgba(244, 114, 182, 0.7);
}

.subtitle {
  font-size: 1.2rem;
  color: #cbd5e1;
  max-width: 520px;
}

.hint {
  font-size: 0.95rem;
  color: #94a3b8;
}

kbd {
  background: #334155;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
  color: var(--neon-yellow);
}

/* 按钮 */
button {
  cursor: pointer;
  border: none;
  border-radius: 10px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.neon-btn {
  padding: 14px 40px;
  font-size: 1.25rem;
  font-weight: bold;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  color: #0f172a;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.5);
}

.neon-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.8);
}

.ghost-btn {
  padding: 10px 28px;
  font-size: 1rem;
  background: transparent;
  color: var(--neon-blue);
  border: 2px solid var(--neon-blue);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
}

.ghost-btn:hover {
  background: rgba(56, 189, 248, 0.15);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
}

/* 按钮网格（模式/难度选择） */
.btn-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 260px));
  gap: 18px;
}

.mode-btn,
.difficulty-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 18px 14px;
  font-size: 1rem;
  background: var(--panel-bg);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: #fff;
  border-radius: 14px;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.1);
}

.mode-btn strong,
.difficulty-btn strong {
  font-size: 1.25rem;
  color: var(--neon-blue);
}

.mode-btn span,
.difficulty-btn span {
  font-size: 0.9rem;
  color: #94a3b8;
}

.mode-btn:hover,
.difficulty-btn:hover {
  transform: translateY(-4px);
  border-color: var(--neon-pink);
  box-shadow: 0 0 25px rgba(244, 114, 182, 0.4);
}

/* 游戏界面 */
#game-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0; /* 覆盖 .screen 的 padding，让画布真正全屏 */
}

#game-canvas-wrapper {
  position: relative;
  width: 100vw;
  height: 100vh;
}

#game-canvas {
  width: 100vw;
  height: 100vh;
  display: block;
  background: #020617;
  /* 全屏显示，去掉边框圆角避免画面被裁切 */
  border: none;
  border-radius: 0;
  box-shadow: none;
}

/* HUD */
#hud {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  background: var(--panel-bg);
  padding: 10px 18px;
  border-radius: 14px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.15);
  font-size: 1rem;
  z-index: 10;
  backdrop-filter: blur(4px);
}

.hud-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.hud-icon {
  font-size: 1.1rem;
}

#hud-lives {
  color: var(--neon-red);
  letter-spacing: 3px;
}

#hud-score,
#hud-max-combo {
  color: var(--neon-yellow);
  font-weight: bold;
}

.combo-box {
  position: relative;
  min-width: 80px;
}

#hud-combo {
  color: var(--neon-yellow);
  font-weight: bold;
  display: inline-block;
  transition: color 0.3s ease;
}

#hud-combo.combo-pop {
  animation: comboPop 0.5s ease;
}

@keyframes comboPop {
  0% { transform: scale(1) rotate(0deg); }
  35% { transform: scale(2.1) rotate(-6deg); }
  70% { transform: scale(1.3) rotate(5deg); }
  100% { transform: scale(1) rotate(0deg); }
}

.combo-bar-wrap {
  position: absolute;
  bottom: 2px;
  left: 10px;
  right: 10px;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  overflow: hidden;
}

#combo-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--neon-yellow), var(--neon-pink));
  transition: width 0.2s ease;
  box-shadow: 0 0 8px var(--neon-yellow);
}

.mode-tag {
  color: var(--neon-purple);
  font-weight: bold;
}

#hud-time {
  color: var(--neon-blue);
  font-weight: bold;
}

.hud-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 8px 16px;
  font-size: 0.95rem;
  background: var(--panel-bg);
  color: var(--neon-blue);
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: 8px;
  z-index: 10;
}

.hud-btn:hover {
  background: rgba(56, 189, 248, 0.2);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.3);
}

#zen-end-btn {
  top: 56px;
  color: var(--neon-pink);
  border-color: rgba(244, 114, 182, 0.4);
}

/* 摄像头小窗口 */
.input-video {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 160px;
  height: 120px;
  border-radius: 10px;
  opacity: 0.75;
  transform: scaleX(-1);
  object-fit: cover;
  border: 1px solid rgba(56, 189, 248, 0.4);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.2);
  z-index: 30;
  pointer-events: none;
}

/* 手势识别测试提示 */
#gesture-debug {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 999;
  padding: 8px 16px;
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--neon-yellow);
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(250, 204, 21, 0.5);
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(250, 204, 21, 0.3);
  pointer-events: none;
}

/* 摄像头错误提示（居中红字） */
#camera-error {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1000;
  padding: 20px 28px;
  font-size: 1.25rem;
  font-weight: bold;
  color: #fff;
  background: rgba(127, 29, 29, 0.95);
  border: 2px solid var(--neon-red);
  border-radius: 12px;
  box-shadow: 0 0 30px rgba(239, 68, 68, 0.6);
  max-width: 90vw;
  text-align: center;
  line-height: 1.6;
}

/* 覆盖层 */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 14px;
}

#countdown-overlay {
  font-size: 9rem;
  font-weight: bold;
  color: var(--neon-blue);
  text-shadow: 0 0 30px rgba(56, 189, 248, 0.9);
  animation: countdownPulse 0.8s ease infinite;
  background: rgba(5, 5, 16, 0.65);
}

@keyframes countdownPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.12); opacity: 0.85; }
}

#pause-overlay {
  background: rgba(5, 5, 16, 0.92);
  flex-direction: column;
  gap: 16px;
}

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

.pause-content h2 {
  color: var(--neon-pink);
  margin-bottom: 10px;
}

/* ===== 过关结算面板（魔法手势师） ===== */
#level-clear-overlay {
  background: rgba(5, 5, 16, 0.88);
  flex-direction: column;
  gap: 16px;
}

.level-clear-panel {
  text-align: center;
  padding: 24px;
}

.level-clear-panel h2 {
  font-size: 2rem;
  color: var(--neon-yellow);
  text-shadow: 0 0 12px rgba(250, 204, 21, 0.7);
  margin-bottom: 8px;
}

.level-clear-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 8px;
}

/* 结算卡片 */
.result-card {
  background: var(--panel-bg);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 20px;
  padding: 32px 42px;
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.2);
  backdrop-filter: blur(6px);
  max-width: 560px;
  width: 100%;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.result-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
}

.result-label {
  font-size: 0.85rem;
  color: #94a3b8;
}

.result-value {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--neon-yellow);
}

#result-feedback {
  font-size: 1.15rem;
  color: var(--neon-pink);
  min-height: 2.5em;
  margin: 16px 0;
  line-height: 1.5;
}

/* ===== 手势失误柱状图（魔法手势师结算页） ===== */
#gesture-chart {
  margin: 4px 0 12px;
  text-align: left;
}

#gesture-chart h3 {
  font-size: 1rem;
  color: var(--neon-blue);
  text-align: center;
  margin-bottom: 10px;
}

.chart-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.chart-label {
  width: 72px;
  flex-shrink: 0;
  color: #e2e8f0;
  text-align: right;
}

.chart-track {
  flex: 1;
  height: 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  overflow: hidden;
}

.chart-fill {
  height: 100%;
  width: 0%;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--neon-red), var(--neon-pink));
  transition: width 0.6s ease;
}

.chart-count {
  width: 36px;
  flex-shrink: 0;
  color: var(--neon-yellow);
  font-weight: bold;
  text-align: left;
}

.chart-summary {
  margin-top: 10px;
  font-size: 0.9rem;
  color: #94a3b8;
  text-align: center;
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ===== 关卡选择界面（魔法手势师） ===== */
.level-select-panel {
  background: var(--panel-bg);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: 20px;
  padding: 32px 42px;
  box-shadow: 0 0 40px rgba(56, 189, 248, 0.2);
  backdrop-filter: blur(6px);
  max-width: 640px;
  width: 100%;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 20px 0;
}

.level-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 12px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #fff;
  border-radius: 14px;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.1);
}

.level-btn strong {
  font-size: 1.1rem;
  color: var(--neon-blue);
}

.level-btn span {
  font-size: 0.8rem;
  color: #94a3b8;
}

.level-btn:hover:not(.locked):not(:disabled) {
  transform: translateY(-4px);
  border-color: var(--neon-pink);
  box-shadow: 0 0 25px rgba(244, 114, 182, 0.4);
}

.level-btn-tutorial {
  border-color: rgba(56, 189, 248, 0.6);
}

.level-btn-boss {
  border-color: rgba(239, 68, 68, 0.5);
  box-shadow: 0 0 14px rgba(239, 68, 68, 0.15);
}

.level-btn-boss strong {
  color: var(--neon-red);
}

.level-btn.locked,
.level-btn:disabled {
  cursor: not-allowed;
  opacity: 0.4;
  filter: grayscale(0.6);
  border-color: rgba(148, 163, 184, 0.3);
  box-shadow: none;
}

.level-btn.locked strong,
.level-btn:disabled strong {
  color: #64748b;
}

/* 响应式 */
@media (max-width: 640px) {
  .neon-title { font-size: 2.2rem; }
  .btn-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: repeat(2, 1fr); }
  .level-grid { grid-template-columns: repeat(2, 1fr); }
  #hud { font-size: 0.85rem; gap: 8px; }
}

/* ===== 手势识别状态 HUD（魔法手势师） ===== */
#gesture-hud {
  position: absolute;
  top: 64px;
  right: 16px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: var(--panel-bg);
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(56, 189, 248, 0.35);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.15);
  backdrop-filter: blur(4px);
  min-width: 110px;
}

.gesture-info {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.gesture-name {
  font-size: 1.15rem;
  font-weight: bold;
  color: var(--neon-blue);
  text-shadow: 0 0 8px rgba(56, 189, 248, 0.7);
}

.gesture-conf {
  font-size: 0.85rem;
  color: var(--neon-yellow);
}

.cooldown-wrap {
  position: relative;
  width: 44px;
  height: 44px;
}

.cooldown-ring {
  width: 44px;
  height: 44px;
  transform: rotate(-90deg); /* 从顶部开始 */
}

.cooldown-ring .cd-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.15);
  stroke-width: 3;
}

.cooldown-ring .cd-fg {
  fill: none;
  stroke: var(--neon-yellow);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 0 100;
  transition: stroke-dasharray 0.1s linear;
}

.cooldown-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--neon-yellow);
  pointer-events: none;
}

/* ===== 施法成功/失败提示大字 ===== */
#cast-popup {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 20;
  font-size: 3rem;
  font-weight: bold;
  pointer-events: none;
  white-space: nowrap;
  text-shadow: 0 0 24px rgba(255, 255, 255, 0.6);
}

#cast-popup.success {
  color: var(--neon-yellow);
  animation: castPopup 0.5s ease forwards;
}

#cast-popup.fail {
  color: var(--neon-red);
  text-shadow: 0 0 24px rgba(239, 68, 68, 0.8);
  animation: castPopup 0.5s ease forwards;
}

@keyframes castPopup {
  0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.4); }
  30%  { opacity: 1; transform: translate(-50%, -50%) scale(1.25); }
  60%  { transform: translate(-50%, -50%) scale(1.0); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
}