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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #0d0d1a;
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', sans-serif;
  color: #fff;
}

canvas {
  display: block;
  width: 100%; height: 100%;
  position: fixed; top: 0; left: 0;
}

/* ===== 关卡选择 ===== */

#menuOverlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(ellipse at 50% 40%, rgba(25, 15, 50, 0.95) 0%, rgba(8, 5, 18, 0.98) 100%);
  z-index: 100;
  display: flex; justify-content: center; align-items: center;
  backdrop-filter: blur(12px);
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

#menuContainer {
  text-align: center;
  width: 90%; max-width: 800px;
  animation: slideUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideUp {
  from { transform: translateY(40px) scale(0.95); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

#menuTitle {
  font-size: 48px; font-weight: 900;
  background: linear-gradient(135deg, #c4a0ff, #7c5cff, #ff6ac4);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 6px;
  margin-bottom: 8px;
}

#menuSub {
  font-size: 14px; font-weight: 500;
  color: rgba(180, 170, 220, 0.5);
  letter-spacing: 4px;
  margin-bottom: 12px;
}

#menuDesc {
  font-size: 15px;
  color: rgba(180, 190, 220, 0.5);
  margin-bottom: 36px;
  letter-spacing: 2px;
}

#levelCards {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
}

.level-card {
  width: 120px;
  padding: 20px 12px 16px;
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(20, 12, 45, 0.9), rgba(8, 4, 22, 0.95));
  border: 1px solid rgba(120, 90, 200, 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(120, 90, 200, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.level-card:hover {
  transform: translateY(-5px) scale(1.04);
  box-shadow: 0 8px 30px rgba(120, 90, 200, 0.2);
  border-color: rgba(120, 90, 200, 0.4);
}

.level-card:active { transform: translateY(-2px) scale(0.98); }

.level-card .card-num {
  font-size: 12px; font-weight: 600;
  color: rgba(180, 160, 240, 0.5);
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.level-card .card-name {
  font-size: 20px; font-weight: 800;
  color: #e0d8f0;
  letter-spacing: 2px;
  margin-bottom: 4px;
}

.level-card .card-name-en {
  font-size: 10px; font-weight: 500;
  color: rgba(180, 170, 220, 0.3);
  letter-spacing: 2px;
}

.level-card.completed {
  border-color: rgba(100, 255, 160, 0.3);
}

.level-card.completed::after {
  content: '✓';
  position: absolute; top: 8px; right: 10px;
  font-size: 14px; font-weight: 700;
  color: rgba(100, 255, 160, 0.6);
}

#menuBackBtn {
  font-size: 13px; font-weight: 500;
  color: rgba(180, 170, 220, 0.4);
  background: transparent;
  border: 1px solid rgba(120, 90, 200, 0.15);
  padding: 10px 32px;
  border-radius: 50px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
  letter-spacing: 2px;
}

#menuBackBtn:hover {
  color: rgba(200, 190, 240, 0.8);
  border-color: rgba(120, 90, 200, 0.4);
  transform: scale(1.04);
}

/* ===== 游戏 UI ===== */

#gameUI {
  position: fixed; top: 0; left: 0; width: 100%;
  z-index: 50; pointer-events: none;
}

#gameTopBar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px;
}

.topbar-btn {
  font-size: 13px; font-weight: 500;
  color: rgba(180, 190, 220, 0.5);
  background: rgba(10, 8, 25, 0.7);
  border: 1px solid rgba(120, 90, 200, 0.15);
  padding: 6px 16px;
  border-radius: 50px;
  cursor: pointer;
  pointer-events: auto;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: 1px;
  backdrop-filter: blur(6px);
}

.topbar-btn:hover {
  color: rgba(200, 190, 240, 0.9);
  border-color: rgba(120, 90, 200, 0.4);
}

#levelInfo {
  text-align: center;
}

#currentLevelName {
  font-size: 15px; font-weight: 700;
  color: rgba(200, 190, 240, 0.7);
  letter-spacing: 2px;
}

.hint-text {
  display: block;
  font-size: 12px;
  color: rgba(180, 190, 220, 0.35);
  margin-top: 2px;
}

/* ===== 胜利弹窗 ===== */

#winOverlay {
  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: fadeIn 0.3s ease-out;
}

#winBox {
  text-align: center;
  padding: 40px 56px;
  background: linear-gradient(135deg, rgba(15, 30, 20, 0.95), rgba(8, 15, 10, 0.98));
  border: 1px solid rgba(100, 255, 160, 0.3);
  border-radius: 20px;
  box-shadow: 0 0 60px rgba(100, 255, 160, 0.1);
  animation: boxPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes boxPop {
  from { transform: scale(0.6) translateY(20px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}

#winIcon { font-size: 48px; margin-bottom: 12px; }

#winBox h1 {
  font-size: 42px; font-weight: 900;
  background: linear-gradient(135deg, #80ffaa, #40c080);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 4px;
  margin-bottom: 12px;
}

#winBox p {
  font-size: 15px;
  color: rgba(200, 230, 210, 0.6);
  margin-bottom: 28px;
}

#winBtns {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}

#winBtns button {
  font-size: 15px; font-weight: 600;
  border: none; border-radius: 50px;
  padding: 12px 36px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  letter-spacing: 2px;
}

#winBtns button:hover { transform: scale(1.05); }
#winBtns button:active { transform: scale(0.97); }

#winNextBtn {
  color: #fff;
  background: linear-gradient(135deg, #40c080, #20a060);
  box-shadow: 0 4px 20px rgba(64, 192, 128, 0.3);
}

#winRetryBtn {
  color: rgba(200, 230, 210, 0.7);
  background: rgba(40, 60, 40, 0.6);
  border: 1px solid rgba(100, 200, 140, 0.2) !important;
}

#winMenuBtn {
  color: rgba(180, 190, 220, 0.5);
  background: transparent;
  border: 1px solid rgba(120, 90, 200, 0.15) !important;
}

/* ===== 失败弹窗 ===== */

#loseOverlay {
  display: none;
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.75);
  z-index: 200;
  justify-content: center; align-items: center;
  backdrop-filter: blur(8px);
  animation: fadeIn 0.3s ease-out;
}

#loseBox {
  text-align: center;
  padding: 40px 56px;
  background: linear-gradient(135deg, rgba(30, 10, 15, 0.95), rgba(15, 5, 8, 0.98));
  border: 1px solid rgba(255, 80, 100, 0.3);
  border-radius: 20px;
  box-shadow: 0 0 60px rgba(255, 80, 100, 0.1);
  animation: boxPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#loseIcon { font-size: 48px; margin-bottom: 12px; }

#loseBox h1 {
  font-size: 42px; font-weight: 900;
  color: #ff5064;
  letter-spacing: 4px;
  margin-bottom: 12px;
}

#loseBox p {
  font-size: 15px;
  color: rgba(255, 180, 190, 0.5);
  margin-bottom: 28px;
}

#loseBtns {
  display: flex; gap: 12px; justify-content: center;
}

#loseBtns button {
  font-size: 15px; font-weight: 600;
  border: none; border-radius: 50px;
  padding: 12px 36px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  letter-spacing: 2px;
}

#loseBtns button:hover { transform: scale(1.05); }
#loseBtns button:active { transform: scale(0.97); }

#loseRetryBtn {
  color: #fff;
  background: linear-gradient(135deg, #ff5064, #e03050);
  box-shadow: 0 4px 20px rgba(255, 80, 100, 0.3);
}

#loseMenuBtn {
  color: rgba(180, 190, 220, 0.5);
  background: transparent;
  border: 1px solid rgba(120, 90, 200, 0.15) !important;
}

/* ===== 手机适配 ===== */

@media (max-width: 600px) {
  #menuTitle { font-size: 32px; letter-spacing: 3px; }
  #menuSub { font-size: 12px; }
  .level-card { width: 100px; padding: 16px 8px 12px; }
  .level-card .card-name { font-size: 17px; }
  #winBox, #loseBox { padding: 30px 32px; }
  #winBox h1, #loseBox h1 { font-size: 32px; }

  /* 关卡选择更紧凑 */
  #levelCards { gap: 10px; }
  #menuDesc { font-size: 13px; margin-bottom: 24px; }
  #menuBackBtn { font-size: 12px; padding: 8px 24px; }

  /* 游戏 UI */
  #gameTopBar { padding: 8px 12px; }
  #currentLevelName { font-size: 13px; }
  .hint-text { font-size: 10px; }
  .topbar-btn { font-size: 11px; padding: 5px 12px; }
}

/* ===== 手机端虚拟方向键 ===== */

#dpad {
  display: none;
  position: fixed;
  bottom: 30px;
  right: 24px;
  z-index: 80;
  width: 156px;
  height: 156px;
}

.dpad-btn {
  position: absolute;
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: rgba(30, 20, 60, 0.65);
  border: 1px solid rgba(120, 90, 200, 0.25);
  color: rgba(200, 190, 240, 0.7);
  font-size: 20px;
  line-height: 50px;
  text-align: center;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.12s, border-color 0.12s;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}
.dpad-btn:active {
  background: rgba(100, 80, 200, 0.5);
  border-color: rgba(140, 110, 240, 0.6);
}

#dpadUp    { top: 0;   left: 53px; }
#dpadDown  { bottom: 0; left: 53px; }
#dpadLeft  { top: 53px; left: 0; }
#dpadRight { top: 53px; right: 0; }

/* 左下角功能键 */
#mobileActions {
  display: none;
  position: fixed;
  bottom: 36px;
  left: 24px;
  z-index: 80;
  flex-direction: column;
  gap: 10px;
}
.mobile-action-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(30, 20, 60, 0.65);
  border: 1px solid rgba(120, 90, 200, 0.2);
  color: rgba(200, 190, 240, 0.55);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.12s, border-color 0.12s;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}
.mobile-action-btn:active {
  background: rgba(100, 80, 200, 0.4);
  border-color: rgba(140, 110, 240, 0.5);
}

@media (max-width: 600px) {
  #dpad { display: block; }
  #mobileActions { display: flex; }

  /* 方向键区域可能挡住提示文字，缩小底部提示区域 */
  .hint-text { display: none; }
}

@media (max-width: 380px) {
  #dpad { width: 140px; height: 140px; right: 16px; bottom: 24px; }
  .dpad-btn { width: 44px; height: 44px; font-size: 18px; line-height: 44px; border-radius: 12px; }
  #dpadUp { left: 48px; }
  #dpadDown { left: 48px; }
  #dpadLeft { top: 48px; }
  #dpadRight { top: 48px; }
  .mobile-action-btn { width: 46px; height: 46px; font-size: 12px; }
  #mobileActions { left: 16px; bottom: 28px; }
}