/* ============================================================
   试管倒水游戏 — 糖果梦境主题 (Candy Dreamland)
   面向 5-10 岁儿童的高饱和度、柔和圆润 UI
   ============================================================ */

/* ---------- 1. CSS 变量 / 设计令牌 ---------- */
:root {
  --app-vh: 1vh;

  /* 背景渐变 */
  --bg-top: #FFD4E5;
  --bg-mid: #FFE0EE;
  --bg-bottom: #D4F1FF;

  /* 卡片 / 面板 */
  --card-bg: rgba(255, 255, 255, 0.92);
  --card-border: #E8D0F8;

  /* 文字 */
  --text-main: #3D2D5C;
  --text-soft: #5C4A7A;
  --text-inverse: #fff;

  /* 试管 */
  --tube-bg: rgba(255, 255, 255, 0.92);
  --tube-border: #C8A8E8;
  --tube-width: 80px;
  --cell-height: 48px;
  --tube-radius: 22px;
  --tube-inner-radius: 12px;
  --tube-bottom-radius: 24px;
  --tube-head-space: 16px;

  /* 选中态 */
  --selected-border: #E91E8C;
  --selected-glow: rgba(233, 30, 140, 0.40);
  --selected-pulse: rgba(255, 105, 180, 0.30);

  /* 按钮 — 主色粉 */
  --btn-main-start: #FF8AC3;
  --btn-main-end: #FF6FA6;
  --btn-main-shadow: rgba(255, 106, 170, 0.35);

  /* 按钮 — 副色蓝 */
  --btn-second-start: #8FD4FF;
  --btn-second-end: #66BDF7;

  /* 按钮 — 柔和 */
  --btn-muted: #F4EEFC;
  --btn-muted-border: #DDD0F5;

  /* 提示条 */
  --toast-bg: #FFCE68;
  --toast-text: #4A3200;

  /* 弹框遮罩 */
  --modal-overlay: rgba(69, 45, 105, 0.42);

  /* 平板外框 */
  --frame-color: #C8A8E8;
  --frame-inner-bg: linear-gradient(180deg, #FFE8F3 0%, #F8E4FA 40%, #EDE0F6 100%);

  /* 安全区 */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
}

/* ---------- 2. 全局重置 ---------- */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: calc(var(--app-vh) * 100);
  color: var(--text-main);
  font-family: "Baloo 2", "Nunito", "Microsoft YaHei", sans-serif;
  background: linear-gradient(
    180deg,
    var(--bg-top) 0%,
    var(--bg-mid) 40%,
    var(--bg-bottom) 100%
  );
  overflow: hidden;
  padding:
    max(12px, var(--safe-top))
    max(12px, var(--safe-right))
    max(88px, calc(var(--safe-bottom) + 80px))
    max(12px, var(--safe-left));
}

/* ---------- 3. 背景装饰层 ---------- */
.bg-decor {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* 云朵 — 棉花糖质感 */
.cloud {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(
    circle at 30% 30%,
    rgba(255, 255, 255, 0.97),
    rgba(255, 240, 250, 0.75)
  );
  filter: blur(0.5px);
  animation: floatCloud 14s ease-in-out infinite;
}

.cloud-1 {
  width: 200px;
  height: 90px;
  left: 3%;
  top: 10%;
  box-shadow:
    65px -5px 0 -18px rgba(255, 255, 255, 0.85),
    130px 8px 0 -28px rgba(255, 245, 252, 0.75);
  animation-delay: 0s;
}

.cloud-2 {
  width: 160px;
  height: 70px;
  right: 8%;
  top: 6%;
  box-shadow: 55px 0 0 -14px rgba(255, 255, 255, 0.88);
  animation-delay: 2.5s;
}

.cloud-3 {
  width: 180px;
  height: 78px;
  left: 30%;
  top: 16%;
  opacity: 0.85;
  animation-delay: 5s;
}

@keyframes floatCloud {
  0%, 100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-10px) translateX(6px); }
}

/* 糖果山丘 — 底部起伏 */
.candy-hill {
  position: absolute;
  bottom: 0;
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  filter: blur(0.5px);
}

.hill-1 {
  left: -6%;
  width: 46%;
  height: 26%;
  background: linear-gradient(
    180deg,
    #A8E6CF 0%,
    #7DD4A8 60%,
    #6BC99A 100%
  );
  opacity: 0.88;
}

.hill-2 {
  right: -4%;
  width: 42%;
  height: 30%;
  background: linear-gradient(
    180deg,
    #FFD9E8 0%,
    #FFB8D0 60%,
    #FFA0C0 100%
  );
  opacity: 0.85;
}

.hill-3 {
  left: 28%;
  width: 52%;
  height: 22%;
  background: linear-gradient(
    180deg,
    #FFECAA 0%,
    #FFD76E 60%,
    #F5C842 100%
  );
  opacity: 0.78;
}

/* ---------- 4. 平板外框 ---------- */
.tablet-frame {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 12px auto;
  padding: 14px;
  background: linear-gradient(
    145deg,
    #D4BEF0 0%,
    var(--frame-color) 50%,
    #BEA4DC 100%
  );
  border-radius: 34px;
  box-shadow:
    0 22px 52px rgba(100, 70, 140, 0.30),
    inset 0 1px 0 rgba(255, 255, 255, 0.45),
    inset 0 -1px 0 rgba(120, 90, 160, 0.15);
}

/* 屏幕内区 */
.app-shell {
  position: relative;
  max-width: 100%;
  margin: 0;
  background: var(--frame-inner-bg);
  border: none;
  border-radius: 24px;
  padding: 14px 18px 18px;
  min-height: calc(var(--app-vh) * 100 - max(16px, var(--safe-top)) - max(16px, var(--safe-bottom)) - 56px);
  display: flex;
  flex-direction: column;
  box-shadow:
    inset 0 0 50px rgba(255, 200, 230, 0.10),
    inset 0 0 0 1px rgba(255, 255, 255, 0.55);
}

/* ---------- 5. 顶部工具栏 ---------- */
.toolbar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 8px 2px 8px;
}

.level-label {
  margin: 0;
  padding: 10px 28px;
  border-radius: 999px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--text-main);
  background: linear-gradient(120deg, #FFF2FA, #F0EAFF);
  border: 2.5px solid #E3D5FF;
  box-shadow: 0 4px 14px rgba(146, 92, 198, 0.12);
}

/* 设置按钮 */
.btn-settings {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  min-width: 44px;
  min-height: 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  background: linear-gradient(140deg, #FFE0F0, #F0D4FF);
  border: 2.5px solid #E0CCF5;
  box-shadow: 0 4px 12px rgba(180, 120, 200, 0.18);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-settings .dock-icon {
  font-size: 18px;
  line-height: 1;
}

.btn-settings:hover {
  transform: translateY(-50%) scale(1.08);
  box-shadow: 0 6px 16px rgba(180, 120, 200, 0.25);
}

.btn-settings:active {
  transform: translateY(-50%) scale(0.96);
}

/* ---------- 6. 通用按钮 ---------- */
button {
  min-height: 48px;
  min-width: 48px;
  padding: 10px 20px;
  border-radius: 999px;
  border: none;
  font-size: 16px;
  font-weight: 700;
  color: white;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

button:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

button:focus-visible,
.tube:focus-visible {
  outline: 3px solid var(--selected-border);
  outline-offset: 3px;
}

/* 主操作按钮 — 粉色系 */
#btn-restart,
#btn-next,
#btn-replay,
#btn-deadlock-retry,
#btn-settings-play {
  background: linear-gradient(140deg, var(--btn-main-start), var(--btn-main-end));
  box-shadow: 0 6px 18px var(--btn-main-shadow);
}

/* 副操作按钮 — 蓝色系 */
#btn-levels,
#btn-levels-from-win,
#btn-close-levels,
#btn-settings-close {
  background: linear-gradient(140deg, var(--btn-second-start), var(--btn-second-end));
  box-shadow: 0 6px 18px rgba(88, 169, 228, 0.30);
}

/* 弱化按钮 — 默认态也是浅粉，和 UI 图一致 */
button.secondary {
  background: linear-gradient(140deg, #FFB8D8, #FF9EC8);
  color: #fff;
  border: none;
  box-shadow: 0 4px 14px rgba(255, 140, 190, 0.28);
}

/* ---------- 7. 试管容器 ---------- */
#tubes-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--tube-width), 1fr));
  align-items: end;
  justify-items: center;
  gap: clamp(14px, 2.6vw, 24px);
  min-height: 320px;
  padding: 18px 12px 28px;
  border-radius: 18px;
  background: transparent;
  width: 100%;
  flex: 1;
  align-content: center;
}

/* ---------- 8. 试管 ---------- */
.tube {
  position: relative;
  transform-origin: 50% 100%;
  width: var(--tube-width);
  min-height: calc(var(--cell-height) * 4 + var(--tube-head-space));
  display: flex;
  flex-direction: column-reverse;
  padding: var(--tube-head-space) 0 0 0;
  border-radius:
    var(--tube-inner-radius)
    var(--tube-inner-radius)
    var(--tube-bottom-radius)
    var(--tube-bottom-radius);
  /* 半透明玻璃底色：中间几乎透明，两侧略带紫调 */
  background: linear-gradient(
    90deg,
    rgba(230, 220, 248, 0.30) 0%,
    rgba(255, 255, 255, 0.12) 20%,
    rgba(255, 255, 255, 0.06) 50%,
    rgba(255, 255, 255, 0.10) 80%,
    rgba(225, 215, 245, 0.25) 100%
  );
  border: 2.5px solid var(--tube-border);
  box-shadow:
    /* 左侧玻璃高光 */
    inset 5px 0 10px rgba(255, 255, 255, 0.55),
    /* 右侧暗边 */
    inset -4px 0 8px rgba(190, 175, 225, 0.18),
    /* 底部微光 */
    inset 0 -4px 10px rgba(200, 185, 240, 0.10),
    /* 外阴影 */
    0 0 18px rgba(200, 168, 232, 0.10),
    0 6px 18px rgba(100, 80, 150, 0.15);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  overflow: visible;
}

/* 玻璃反射高光条 — 左侧竖向白色光带 */
.tube-glass-highlight {
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 8px;
  border-radius: 999px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.10) 0%,
    rgba(255, 255, 255, 0.55) 15%,
    rgba(255, 255, 255, 0.65) 50%,
    rgba(255, 255, 255, 0.50) 85%,
    rgba(255, 255, 255, 0.08) 100%
  );
  pointer-events: none;
  z-index: 5;
}

/* 玻璃反射 — 右侧次级光带 */
.tube-glass-highlight::after {
  content: "";
  position: absolute;
  right: -28px;
  top: 20%;
  bottom: 25%;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.20) 30%,
    rgba(255, 255, 255, 0.25) 50%,
    rgba(255, 255, 255, 0.15) 75%,
    rgba(255, 255, 255, 0) 100%
  );
}

/* 管口 — 顶部加厚椭圆圆边 */
.tube::before {
  content: "";
  position: absolute;
  left: -5px;
  right: -5px;
  top: -7px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.90),
    rgba(215, 200, 240, 0.80)
  );
  border: 2.5px solid var(--tube-border);
  box-shadow: 0 2px 8px rgba(120, 100, 170, 0.18);
  pointer-events: none;
  z-index: 6;
}

/* 试管 hover */
.tube:hover:not(.selected) {
  transform: translateY(-3px);
  border-color: #B094D8;
}

/* 选中试管 — 粉色高亮脉动 */
.tube.selected {
  border-color: var(--selected-border);
  border-width: 3px;
  transform: translateY(-5px) scale(1.06);
  box-shadow:
    0 0 0 6px var(--selected-glow),
    0 14px 26px rgba(233, 30, 140, 0.24);
  animation: tubeSelectedPulse 1.2s ease-in-out infinite;
}

.tube.selected::after {
  content: "\2713";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(145deg, #FF70B8, #E91E8C);
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  line-height: 28px;
  text-align: center;
  box-shadow: 0 4px 14px rgba(233, 30, 140, 0.45);
  pointer-events: none;
  z-index: 3;
}

@keyframes tubeSelectedPulse {
  0%, 100% {
    box-shadow:
      0 0 0 6px var(--selected-glow),
      0 14px 26px rgba(233, 30, 140, 0.24);
  }
  50% {
    box-shadow:
      0 0 0 10px var(--selected-pulse),
      0 14px 30px rgba(233, 30, 140, 0.32);
  }
}

/* 倒水动画态 */
.tube.pouring-source {
  z-index: 15;
  transition: none;
}

.tube.pouring-target {
  animation: pourTarget 0.28s ease;
}

.tube.shake {
  animation: shake 0.25s ease;
}

@keyframes pourSource {
  0% { transform: rotate(0deg) scale(1); }
  25% { transform: rotate(-12deg) scale(1.02); }
  70% { transform: rotate(-8deg) scale(1.01); }
  100% { transform: rotate(0deg) scale(1); }
}

@keyframes pourTarget {
  0% { transform: translateY(0) scale(1); }
  40% { transform: translateY(-6px) scale(1.02); }
  100% { transform: translateY(0) scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* ---------- 9. 试管格子（液体层） ---------- */
.tube-cell {
  position: relative;
  overflow: hidden;
  height: var(--cell-height);
  border-radius: 0;
  transition: height 0.35s ease, background 0.15s ease, transform 0.2s ease;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

/* 底部格 — 圆底 */
.tube-cell:first-child {
  border-radius: 0 0 var(--tube-bottom-radius) var(--tube-bottom-radius);
}

/* 顶部格 */
.tube-cell:last-child {
  border-radius: var(--tube-inner-radius) var(--tube-inner-radius) 0 0;
}

.tube-cell.empty {
  background: transparent;
  box-shadow: none;
  border-top: none;
}

.tube-cell.empty:first-child {
  box-shadow: none;
}

/* 液体高光 — 极细的顶部光泽条，不遮盖颜色 */
.tube-cell.filled::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  top: 3px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
  pointer-events: none;
}

/* 液体暗部 — 极轻微的底边加深 */
.tube-cell.filled::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: rgba(0, 0, 0, 0.06);
  pointer-events: none;
}

/* 顶层液面 — 轻微的液面反光 */
.tube-cell.top-liquid {
  box-shadow: inset 0 4px 6px rgba(255, 255, 255, 0.25);
}

/* ---------- 10. 空试管 ---------- */
.tube.tube-empty {
  border-style: dashed;
  border-color: rgba(200, 168, 232, 0.55);
  background: linear-gradient(
    90deg,
    rgba(230, 220, 248, 0.18) 0%,
    rgba(255, 255, 255, 0.06) 30%,
    rgba(255, 255, 255, 0.04) 50%,
    rgba(255, 255, 255, 0.06) 70%,
    rgba(225, 215, 245, 0.15) 100%
  );
}

/* 选择目标阶段 — 空试管高亮引导 */
.bottom-dock.is-picking-target ~ #tubes-container .tube.tube-empty,
.tube.tube-empty.hint-glow {
  border-color: rgba(255, 112, 184, 0.80);
  border-style: solid;
  border-width: 3px;
  box-shadow: 0 0 0 4px rgba(255, 159, 208, 0.35);
  animation: emptyTubeHint 1.2s ease-in-out infinite;
}

@keyframes emptyTubeHint {
  0%, 100% { box-shadow: 0 0 0 4px rgba(255, 159, 208, 0.35); }
  50% { box-shadow: 0 0 0 8px rgba(255, 159, 208, 0.20), 0 6px 20px rgba(233, 30, 140, 0.18); }
}

/* ---------- 11. 底部操作栏 ---------- */
.bottom-dock {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: max(12px, var(--safe-bottom));
  z-index: 180;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 999px;
  background: linear-gradient(
    160deg,
    rgba(255, 253, 255, 0.97),
    rgba(248, 244, 255, 0.96)
  );
  border: 2.5px solid #E8D8F8;
  box-shadow:
    0 6px 24px rgba(95, 67, 136, 0.18),
    0 2px 8px rgba(140, 110, 180, 0.10);
  backdrop-filter: blur(12px);
  transition: border-color 0.24s ease, box-shadow 0.24s ease;
  max-width: calc(100vw - 24px);
}

.bottom-dock button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  height: 44px;
  border-radius: 999px;
  font-size: 15px;
  padding: 0 20px;
  white-space: nowrap;
  flex-shrink: 0;
}

.dock-icon {
  font-size: 16px;
  line-height: 1;
}

.dock-label {
  font-size: 15px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.02em;
}

/* 选择目标阶段 — 底栏高亮 */
.bottom-dock.is-picking-target {
  border-color: #FF9FD0;
  box-shadow:
    0 0 0 2px rgba(255, 141, 197, 0.20),
    0 6px 24px rgba(95, 67, 136, 0.18);
}

.bottom-dock.is-picking-target #btn-cancel {
  background: linear-gradient(140deg, #FF8EC6, #FF6CAB);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(255, 106, 170, 0.35);
}

#btn-cancel:disabled {
  opacity: 0.38;
  filter: grayscale(0.2);
  box-shadow: none;
}

/* ---------- 12. 提示条 (Toast) ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: max(100px, calc(var(--safe-bottom) + 94px));
  transform: translateX(-50%);
  z-index: 100;
  max-width: 92%;
  padding: 14px 30px;
  border-radius: 20px;
  border: 3px solid #E6B800;
  background: var(--toast-bg);
  color: var(--toast-text);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.35;
  box-shadow: 0 8px 26px rgba(168, 123, 31, 0.28);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.24s, visibility 0.24s;
}

.toast.show {
  opacity: 1;
  visibility: visible;
}

/* ---------- 13. 弹框通用 ---------- */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--modal-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s, visibility 0.28s;
  z-index: 200;
}

.modal[data-open="true"] {
  opacity: 1;
  visibility: visible;
}

.modal[hidden] {
  display: none;
}

.modal-content {
  width: min(520px, 92vw);
  background:
    radial-gradient(circle at 14% 20%, #ffffff 0, #ffffffcc 36%, #ffffff 100%),
    #fff;
  border: 3px solid #EAD0FF;
  border-radius: 28px;
  padding: 26px 26px 24px;
  box-shadow: 0 22px 40px rgba(75, 48, 114, 0.28);
  animation: modalIn 0.3s ease;
  max-height: min(78vh, calc(var(--app-vh) * 86));
  overflow: auto;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.90) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-content h2 {
  margin: 0 0 12px;
  text-align: center;
  font-size: 32px;
  font-weight: 800;
  color: #8B3DB8;
  text-shadow: 0 2px 4px rgba(139, 61, 184, 0.12);
}

/* ---------- 14. 过关弹框 ---------- */
.modal-win {
  position: relative;
  overflow: hidden;
}

.win-badge {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  margin: 0 auto 10px;
  display: grid;
  place-items: center;
  font-size: 38px;
  background: radial-gradient(circle at 30% 30%, #FFFBE6, #FFD76E 70%);
  border: 3px solid #FFC94D;
  box-shadow: 0 8px 20px rgba(215, 149, 0, 0.22);
}

.celebration-burst {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.star {
  position: absolute;
  opacity: 0;
  color: #FFD54F;
  text-shadow: 0 2px 8px rgba(255, 190, 0, 0.35);
}

.star-1 { left: 14%; top: 18%; font-size: 18px; }
.star-2 { right: 16%; top: 14%; font-size: 22px; }
.star-3 { left: 28%; top: 6%; font-size: 24px; }
.star-4 { right: 30%; top: 8%; font-size: 16px; }
.star-5 { left: 50%; top: 2%; font-size: 20px; transform: translateX(-50%); }

#win-modal[data-open="true"] .star {
  animation: starBurst 0.85s ease-out forwards;
}

#win-modal[data-open="true"] .star-2 { animation-delay: 0.08s; }
#win-modal[data-open="true"] .star-3 { animation-delay: 0.16s; }
#win-modal[data-open="true"] .star-4 { animation-delay: 0.22s; }
#win-modal[data-open="true"] .star-5 { animation-delay: 0.28s; }

#win-modal[data-open="true"] .win-badge {
  animation: badgePop 0.65s cubic-bezier(.17, .89, .32, 1.29);
}

@keyframes starBurst {
  0% { opacity: 0; transform: translateY(8px) scale(0.4); }
  35% { opacity: 1; transform: translateY(-8px) scale(1.08); }
  100% { opacity: 0; transform: translateY(-18px) scale(0.9); }
}

@keyframes badgePop {
  0% { transform: scale(0.2) rotate(-18deg); opacity: 0; }
  60% { transform: scale(1.12) rotate(8deg); opacity: 1; }
  100% { transform: scale(1) rotate(0deg); }
}

.modal-message {
  margin: 0 0 20px;
  text-align: center;
  color: var(--text-main);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.modal-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.modal-actions button {
  min-width: 110px;
  border-radius: 999px;
  padding: 0 22px;
  height: 48px;
}

/* ---------- 15. 设置弹框 ---------- */
.modal-settings .settings-form {
  margin: 16px 0 20px;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  margin-bottom: 10px;
  border-radius: 18px;
  background: linear-gradient(120deg, #FFF6FB, #F5F0FF);
  border: 2.5px solid #EAD8FF;
}

.setting-label {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
}

.stepper {
  display: flex;
  align-items: center;
  gap: 0;
}

.stepper-btn {
  min-width: 44px;
  min-height: 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50% !important;
  background: linear-gradient(140deg, var(--btn-main-start), var(--btn-main-end));
  box-shadow: 0 4px 12px var(--btn-main-shadow);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, opacity 0.16s ease;
}

.stepper-btn:hover {
  transform: scale(1.1);
}

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

.stepper-btn:disabled {
  opacity: 0.32;
  cursor: default;
  box-shadow: none;
}

.stepper-btn:disabled:hover {
  transform: none;
}

.stepper-value {
  min-width: 54px;
  text-align: center;
  font-size: 28px;
  font-weight: 800;
  color: #7E3FAF;
}

.difficulty-select {
  font-size: 17px;
  font-weight: 700;
  color: #7E3FAF;
  padding: 10px 14px;
  border-radius: 14px;
  border: 2.5px solid #E7D1FF;
  background: linear-gradient(120deg, #FFF6FB, #F5F0FF);
  min-width: 140px;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237E58A0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.custom-params.is-disabled {
  opacity: 0.5;
  pointer-events: none;
}

.setting-hint {
  margin: 0;
  text-align: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-soft);
  padding: 4px 0;
}

/* 音效/语音开关样式见 audio.css */

/* ---------- 16. 选关弹框 ---------- */
.modal-levels .level-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(66px, 1fr));
  gap: 10px;
  max-height: 50vh;
  overflow: auto;
  margin-bottom: 14px;
  padding-right: 4px;
}

.modal-levels .level-list button {
  min-height: 60px;
  border-radius: 16px;
  background: linear-gradient(140deg, #FFE4F2, #EBD9FF);
  color: #7E58A0;
  border: 2.5px solid #E7D1FF;
  box-shadow: 0 5px 12px rgba(118, 82, 165, 0.12);
  font-size: 18px;
  padding: 10px 8px;
}

.modal-levels .level-list button.current {
  background: linear-gradient(145deg, #FF8BC4, #FF6CA7);
  color: #fff;
  border-color: #FF79B4;
  box-shadow: 0 6px 16px rgba(255, 106, 170, 0.30);
}

/* ---------- 17. 响应式 — 手机竖屏 ---------- */
@media (max-width: 720px) {
  :root {
    --tube-width: clamp(64px, 14vw, 80px);
    --cell-height: clamp(40px, 9vw, 48px);
    --tube-bottom-radius: 20px;
  }

  body {
    padding:
      max(6px, var(--safe-top))
      max(6px, var(--safe-right))
      max(90px, calc(var(--safe-bottom) + 82px))
      max(6px, var(--safe-left));
  }

  .app-shell {
    margin: 4px auto;
    padding: 10px 10px 12px;
    border-radius: 22px;
  }

  .toolbar {
    justify-content: center;
    padding-top: 4px;
  }

  .level-label {
    width: 100%;
    text-align: center;
    font-size: clamp(18px, 5.6vw, 24px);
    margin-bottom: 2px;
  }

  #tubes-container {
    min-height: 220px;
    padding: 14px 8px 16px;
    border-radius: 18px;
  }

  .modal-content {
    border-radius: 22px;
    padding: 20px 18px 18px;
  }
}

/* ---------- 18. 响应式 — 小手机 ---------- */
@media (max-width: 480px) {
  :root {
    --tube-width: clamp(56px, 18vw, 72px);
    --cell-height: clamp(36px, 10vw, 46px);
    --tube-bottom-radius: 18px;
  }

  .cloud {
    opacity: 0.75;
  }

  button {
    font-size: 14px;
    padding: 8px 14px;
    min-height: 42px;
  }

  #tubes-container {
    gap: 14px;
    min-height: 220px;
    grid-template-columns: repeat(auto-fit, minmax(56px, 1fr));
  }

  .modal-content h2 {
    font-size: 26px;
  }

  .modal-message {
    font-size: 16px;
  }

  .modal-actions button {
    min-width: 90px;
    height: 44px;
    padding: 0 16px;
  }

  .bottom-dock {
    gap: 6px;
    padding: 5px 6px;
  }

  .bottom-dock button {
    min-height: 40px;
    height: 40px;
    font-size: 13px;
    padding: 0 14px;
    gap: 4px;
  }

  .dock-icon {
    font-size: 14px;
  }

  .dock-label {
    font-size: 13px;
  }
}

/* ---------- 19. 响应式 — 平板 ---------- */
@media (min-width: 768px) and (max-width: 1100px) {
  :root {
    --tube-width: clamp(72px, 8vw, 84px);
    --cell-height: clamp(42px, 5vw, 48px);
    --tube-bottom-radius: 22px;
  }

  .tablet-frame {
    max-width: 96%;
  }

  .app-shell {
    border-radius: 22px;
  }

  #tubes-container {
    grid-template-columns: repeat(auto-fit, minmax(64px, 1fr));
    min-height: 320px;
  }
}

/* ---------- 20. 触控优化 ---------- */
@media (pointer: coarse) {
  .tube:hover:not(.selected),
  button:hover {
    transform: none;
    filter: none;
  }

  .tube.selected {
    transform: translateY(-4px) scale(1.05);
  }

  #tubes-container {
    scroll-margin-top: 12px;
  }

  .bottom-dock button:active {
    transform: scale(0.97);
  }
}

/* ---------- 21. 横屏矮窗 ---------- */
@media (max-height: 520px) and (orientation: landscape) {
  body {
    padding-bottom: max(68px, calc(var(--safe-bottom) + 60px));
  }

  .toolbar {
    padding-top: 2px;
    padding-bottom: 4px;
  }

  .level-label {
    font-size: 17px;
    padding: 5px 10px;
  }

  .bg-decor {
    opacity: 0.55;
  }

  #tubes-container {
    min-height: 210px;
    padding-top: 8px;
    padding-bottom: 10px;
  }

  .bottom-dock {
    gap: 6px;
    padding: 4px 6px;
  }

  .bottom-dock button {
    min-height: 36px;
    height: 36px;
    font-size: 12px;
    padding: 0 12px;
    gap: 4px;
  }

  .bottom-dock .dock-icon {
    font-size: 13px;
  }

  .bottom-dock .dock-label {
    font-size: 11px;
  }

  .modal-content {
    max-height: 86vh;
  }
}