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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0a1a;
  font-family: 'Segoe UI', Arial, sans-serif;
}

canvas { display: block; }

/* 暂停菜单 */
#pauseOverlay {
  display: none;
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 250;
  justify-content: center; align-items: center;
  backdrop-filter: blur(8px);
  animation: overlayIn 0.25s ease-out;
}
#pauseBox {
  text-align: center;
  padding: 48px 60px;
  background: linear-gradient(135deg, rgba(20, 10, 40, 0.95), rgba(10, 5, 25, 0.98));
  border: 1px solid rgba(100, 180, 255, 0.3);
  border-radius: 20px;
  box-shadow: 0 0 60px rgba(100, 180, 255, 0.1);
  animation: boxIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
#pauseBox h1 {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  text-shadow: 0 0 20px rgba(100, 180, 255, 0.5);
  margin-bottom: 10px;
  letter-spacing: 6px;
}
#pauseBox p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 36px;
}
#pauseBtns {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}
#pauseResumeBtn {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #64b5f6, #e040fb);
  border: none;
  padding: 14px 56px;
  border-radius: 50px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(100, 181, 246, 0.3);
  letter-spacing: 2px;
}
#pauseResumeBtn:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 30px rgba(100, 181, 246, 0.5);
}
#pauseResumeBtn:active { transform: scale(0.97); }
#pauseMenuBtn, #pauseBackBtn {
  font-size: 14px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.5);
  background: transparent;
  border: 1px solid rgba(100, 180, 255, 0.15);
  padding: 12px 40px;
  border-radius: 50px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
  letter-spacing: 2px;
}
#pauseMenuBtn:hover, #pauseBackBtn:hover {
  color: rgba(180, 210, 255, 0.9);
  border-color: rgba(100, 180, 255, 0.4);
  transform: scale(1.04);
}

/* GameOver 弹窗 */
#gameOverOverlay {
  display: none;
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.75);
  z-index: 100;
  justify-content: center; align-items: center;
  backdrop-filter: blur(8px);
  animation: overlayIn 0.3s ease-out;
}
@keyframes overlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
#gameOverBox {
  text-align: center;
  padding: 50px 60px;
  background: linear-gradient(135deg, rgba(20, 10, 40, 0.95), rgba(10, 5, 25, 0.98));
  border: 1px solid rgba(255, 104, 253, 0.3);
  border-radius: 20px;
  box-shadow: 0 0 60px rgba(255, 104, 253, 0.15), 0 0 120px rgba(21, 190, 252, 0.08);
  animation: boxIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes boxIn {
  from { transform: scale(0.6); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
#gameOverBox h1 {
  font-size: 52px;
  font-weight: 800;
  color: #ff4060;
  text-shadow: 0 0 20px rgba(255, 64, 96, 0.5), 0 0 40px rgba(255, 64, 96, 0.2);
  margin-bottom: 12px;
  letter-spacing: 4px;
}
#gameOverBox p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 36px;
}
#gameOverBtns {
  display: flex;
  gap: 16px;
  justify-content: center;
}
#continueBtn {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #ff68fd, #15befc);
  border: none;
  padding: 14px 48px;
  border-radius: 50px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(255, 104, 253, 0.3);
  letter-spacing: 2px;
}
#continueBtn:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 30px rgba(255, 104, 253, 0.5);
}
#continueBtn:active { transform: scale(0.97); }
#backBtn {
  font-size: 14px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.5);
  background: transparent;
  border: 1px solid rgba(100, 180, 255, 0.15);
  padding: 14px 28px;
  border-radius: 50px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
  letter-spacing: 2px;
}
#backBtn:hover {
  color: rgba(180, 210, 255, 0.9);
  border-color: rgba(100, 180, 255, 0.4);
  transform: scale(1.04);
}
#backBtn:active { transform: scale(0.97); }

/* 胜利弹窗 */
#victoryOverlay {
  display: none;
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 200;
  justify-content: center; align-items: center;
  backdrop-filter: blur(8px);
  animation: overlayIn 0.4s ease-out;
}
#victoryBox {
  text-align: center;
  padding: 40px 56px 36px;
  background: linear-gradient(135deg, rgba(10, 5, 30, 0.95), rgba(5, 2, 15, 0.98));
  border: 1px solid rgba(100, 180, 255, 0.4);
  border-radius: 24px;
  animation: victoryBoxIn 0.4s ease-out;
  min-width: 340px;
}
@keyframes victoryBoxIn {
  from { transform: scale(0.8) translateY(30px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}
#victoryStars {
  margin-bottom: 16px;
  display: flex;
  justify-content: center;
  gap: 12px;
}
#victoryStars .star {
  font-size: 42px;
  color: rgba(255, 255, 255, 0.12);
  transition: color 0.5s ease, text-shadow 0.5s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  transform: scale(0.6);
}
#victoryStars .star.lit {
  color: #ffd740;
  text-shadow: 0 0 20px rgba(255, 215, 64, 0.6), 0 0 40px rgba(255, 215, 64, 0.3);
  transform: scale(1);
}
#victoryStars .star.pop {
  animation: starPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes starPop {
  0%   { transform: scale(0.3); opacity: 0.3; }
  50%  { transform: scale(1.3); }
  100% { transform: scale(1); opacity: 1; }
}
#victoryBox h1 {
  font-size: 48px;
  font-weight: 900;
  background: linear-gradient(135deg, #64b5f6, #e040fb, #ffd740);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  letter-spacing: 4px;
}
#victoryBox p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 8px;
}
#victoryStats {
  font-size: 15px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.5);
  margin-bottom: 28px;
  letter-spacing: 1px;
  line-height: 1.8;
}
#victoryBtns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
#victoryNextBtn {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #64b5f6, #e040fb);
  border: none;
  padding: 14px 48px;
  border-radius: 50px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(100, 181, 246, 0.3);
  letter-spacing: 2px;
}
#victoryNextBtn:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 30px rgba(100, 181, 246, 0.5);
}
#victoryNextBtn:active { transform: scale(0.97); }
#victoryBackBtn {
  font-size: 14px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.5);
  background: transparent;
  border: 1px solid rgba(100, 180, 255, 0.15);
  padding: 12px 28px;
  border-radius: 50px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
  letter-spacing: 1px;
}
#victoryBackBtn:hover {
  color: rgba(180, 210, 255, 0.9);
  border-color: rgba(100, 180, 255, 0.4);
  transform: scale(1.04);
}
#victoryNextBtn.hidden { display: none; }

/* 距离显示 */
#distanceUI {
  position: fixed;
  top: 30px;
  right: 40px;
  text-align: right;
  z-index: 50;
  pointer-events: none;
}
#distCurrent {
  font-size: 52px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 2px;
  line-height: 1;
  text-shadow:
    0 0 15px rgba(100, 180, 255, 0.6),
    0 0 30px rgba(100, 180, 255, 0.3),
    0 0 60px rgba(100, 180, 255, 0.15);
}
#distCurrent .unit {
  font-size: 24px;
  font-weight: 600;
  color: rgba(180, 210, 255, 0.7);
  margin-left: 4px;
}
#distTarget {
  font-size: 16px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.5);
  margin-top: 8px;
  letter-spacing: 1px;
  text-shadow: 0 0 10px rgba(100, 180, 255, 0.25);
  transition: color 0.4s, text-shadow 0.4s;
}
#distTarget.revealed {
  color: rgba(224, 64, 251, 0.8);
  text-shadow: 0 0 12px rgba(224, 64, 251, 0.4), 0 0 24px rgba(224, 64, 251, 0.15);
}
#levelName {
  font-size: 20px;
  font-weight: 700;
  color: rgba(180, 210, 255, 0.6);
  letter-spacing: 2px;
  margin-bottom: 4px;
  text-shadow: 0 0 10px rgba(100, 180, 255, 0.3);
}

/* 关卡名称闪现 */
#levelAnnounce {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 60;
  pointer-events: none;
  opacity: 0;
}
#levelAnnounce.show {
  animation: levelFlash 2.5s ease-out forwards;
}
@keyframes levelFlash {
  0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.6); }
  15%  { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
  70%  { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1); }
}
#levelAnnounce .level-num {
  font-size: 22px;
  font-weight: 600;
  color: rgba(180, 210, 255, 0.8);
  letter-spacing: 6px;
  text-transform: uppercase;
}
#levelAnnounce .level-title {
  font-size: 56px;
  font-weight: 900;
  background: linear-gradient(135deg, #64b5f6, #e040fb, #ffd740);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 6px;
  margin-top: 8px;
}
#levelAnnounce .level-sub {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 12px;
  letter-spacing: 2px;
}

/* 关卡选择界面 */
#levelSelectOverlay {
  display: none;
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(ellipse at center, rgba(5, 2, 20, 0.92) 0%, rgba(2, 1, 10, 0.98) 100%);
  z-index: 300;
  justify-content: center; align-items: center;
  backdrop-filter: blur(12px);
  animation: overlayIn 0.4s ease-out;
}
#levelSelectContainer {
  text-align: center;
  width: 90%;
  max-width: 750px;
  animation: containerIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes containerIn {
  from { transform: scale(0.85) translateY(40px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}
#levelSelectTitle {
  font-size: 42px;
  font-weight: 900;
  background: linear-gradient(135deg, #64b5f6, #e040fb, #ffd740);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 6px;
  margin-bottom: 8px;
}
#levelSelectSub {
  font-size: 14px;
  color: rgba(180, 210, 255, 0.4);
  letter-spacing: 3px;
  margin-bottom: 40px;
}
#levelCards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-bottom: 36px;
}
.level-card {
  width: 125px;
  padding: 24px 12px 20px;
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(20, 12, 45, 0.9), rgba(8, 4, 22, 0.95));
  border: 1px solid rgba(100, 180, 255, 0.15);
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.25s ease,
              border-color 0.25s ease;
  position: relative;
  overflow: hidden;
}
.level-card::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(100, 180, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}
.level-card:hover {
  transform: translateY(-6px) scale(1.04);
  box-shadow: 0 8px 32px rgba(100, 180, 255, 0.2), 0 0 60px rgba(100, 180, 255, 0.06);
  border-color: rgba(100, 180, 255, 0.4);
}
.level-card:active { transform: translateY(-2px) scale(0.98); }
.level-card .card-num {
  font-size: 13px;
  font-weight: 600;
  color: rgba(100, 180, 255, 0.5);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.level-card .card-name {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 2px;
  margin-bottom: 6px;
  text-shadow: 0 0 12px rgba(100, 180, 255, 0.3);
}
.level-card .card-name-en {
  font-size: 11px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.35);
  letter-spacing: 2px;
  text-transform: uppercase;
}
.level-card.locked {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}
.level-card.locked::after {
  content: '\f023';
  font-family: 'Font Awesome 6 Free', sans-serif;
  font-size: 18px;
  position: absolute;
  top: 10px;
  right: 12px;
  color: rgba(255, 255, 255, 0.2);
}
.level-card.active {
  border-color: rgba(100, 180, 255, 0.6);
  box-shadow: 0 0 20px rgba(100, 180, 255, 0.15);
}
.level-card.active .card-name {
  background: linear-gradient(135deg, #64b5f6, #e040fb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#backToMenuBtn {
  font-size: 14px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.5);
  background: transparent;
  border: 1px solid rgba(100, 180, 255, 0.15);
  padding: 10px 32px;
  border-radius: 50px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
  letter-spacing: 2px;
}
#backToMenuBtn:hover {
  color: rgba(180, 210, 255, 0.9);
  border-color: rgba(100, 180, 255, 0.4);
  transform: scale(1.04);
}

/* 游戏内返回菜单按钮 */
#inGameMenuBtn {
  display: none;
  position: fixed;
  top: 30px;
  left: 40px;
  z-index: 50;
  font-size: 13px;
  font-weight: 500;
  color: rgba(180, 210, 255, 0.5);
  background: rgba(10, 5, 30, 0.6);
  border: 1px solid rgba(100, 180, 255, 0.15);
  padding: 8px 20px;
  border-radius: 50px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: 2px;
  backdrop-filter: blur(6px);
}
#inGameMenuBtn:hover {
  color: rgba(180, 210, 255, 0.9);
  border-color: rgba(100, 180, 255, 0.4);
}

/* 连击鼓励 */
#comboUI {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  z-index: 50;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease-out;
}
#comboUI.visible { opacity: 1; }
#comboWord {
  font-size: 42px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 4px;
  text-transform: uppercase;
  transition: transform 0.15s ease-out, text-shadow 0.3s ease-out;
  transform: scale(1);
}
#comboWord.pop {
  animation: comboPop 0.3s ease-out;
}
@keyframes comboPop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.3); }
  100% { transform: scale(1); }
}
#comboCount {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-top: 4px;
  letter-spacing: 2px;
  transition: transform 0.15s ease-out;
}
#comboCount.bump {
  animation: comboBump 0.25s ease-out;
}
@keyframes comboBump {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* ===== 手机适配 ===== */
@media (max-width: 600px) {
  /* 暂停菜单 */
  #pauseBox { padding: 32px 24px; }
  #pauseBox h1 { font-size: 32px; letter-spacing: 4px; }
  #pauseBox p { font-size: 13px; margin-bottom: 24px; }
  #pauseResumeBtn { font-size: 15px; padding: 12px 40px; }
  #pauseMenuBtn, #pauseBackBtn { font-size: 12px; padding: 10px 28px; }

  /* GameOver */
  #gameOverBox { padding: 32px 24px; }
  #gameOverBox h1 { font-size: 36px; letter-spacing: 3px; }
  #gameOverBox p { font-size: 13px; margin-bottom: 24px; }
  #gameOverBtns { flex-direction: column; gap: 10px; align-items: center; }
  #continueBtn { font-size: 15px; padding: 12px 40px; }
  #backBtn { font-size: 12px; padding: 10px 28px; }

  /* 胜利弹窗 */
  #victoryBox { padding: 28px 20px; min-width: 0; width: 88%; }
  #victoryBox h1 { font-size: 32px; letter-spacing: 3px; }
  #victoryBox p { font-size: 14px; }
  #victoryStats { font-size: 13px; margin-bottom: 20px; }
  #victoryBtns { flex-direction: column; gap: 10px; align-items: center; }
  #victoryNextBtn { font-size: 15px; padding: 12px 36px; }
  #victoryBackBtn { font-size: 12px; padding: 10px 24px; }
  #victoryStars .star { font-size: 32px; }

  /* 距离UI */
  #distanceUI { top: 16px; right: 16px; }
  #distCurrent { font-size: 36px; }
  #distCurrent .unit { font-size: 16px; }
  #distTarget { font-size: 13px; }
  #levelName { font-size: 15px; }

  /* 关卡名称闪现 */
  #levelAnnounce .level-num { font-size: 16px; }
  #levelAnnounce .level-title { font-size: 36px; letter-spacing: 3px; }
  #levelAnnounce .level-sub { font-size: 13px; }

  /* 关卡选择 */
  #levelSelectTitle { font-size: 28px; letter-spacing: 3px; }
  #levelSelectSub { font-size: 12px; }
  #levelCards { gap: 10px; margin-bottom: 24px; }
  .level-card { width: 90px; padding: 16px 8px 14px; border-radius: 12px; }
  .level-card .card-num { font-size: 10px; margin-bottom: 6px; }
  .level-card .card-name { font-size: 16px; margin-bottom: 4px; }
  .level-card .card-name-en { font-size: 9px; }

  /* 游戏内按钮 */
  #inGameMenuBtn { top: 16px; left: 16px; font-size: 11px; padding: 6px 14px; }

  /* 连击 */
  #comboUI { top: 44px; }
  #comboWord { font-size: 28px; }
  #comboCount { font-size: 20px; }
}

@media (max-width: 380px) {
  #levelCards { gap: 8px; }
  .level-card { width: 78px; padding: 12px 6px 10px; }
  .level-card .card-name { font-size: 14px; }
}