/* ==========================================================================
   DOIN · 琉璃灯市·连连看 (pair-link) —— 夜市灯牌 / 琉璃瓷片
   桌面 ≥900px 双栏沉浸舞台 · 移动 ≤768px 单列紧凑
   ========================================================================== */

:root {
  --ink-0: #150f0d;
  --ink-1: #1a1210;
  --ink-2: #241a15;
  --ink-3: #33231b;
  --ink-4: #4a3226;

  --copper: #c9863f;
  --copper-lt: #e8b768;
  --copper-dk: #8a5a24;
  --crimson: #e2503f;
  --crimson-dk: #a83a2c;
  --porcelain: #f3e6d2;

  /* 棋盘方格线：极淡，只为便于心算折线路径，不参与任何"格子存在感" */
  --grid-line: rgba(243, 230, 210, 0.14);
  --line-soft: rgba(243, 230, 210, 0.12);

  --radius-plaque: 14px;
  --radius-btn: 12px;

  --shadow-tile: 0 2px 0 rgba(0, 0, 0, 0.45), 0 6px 14px rgba(0, 0, 0, 0.42);
  --shadow-plaque: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 8px 20px rgba(0, 0, 0, 0.36);
  --shadow-btn: 0 2px 0 rgba(0, 0, 0, 0.5), 0 6px 14px rgba(0, 0, 0, 0.34);

  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
  overscroll-behavior: none;
  background: linear-gradient(165deg, #1a1210 0%, #241a15 52%, #150f0d 100%);
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font);
  color: var(--porcelain);
  background: transparent;
  overflow-x: hidden;
  overscroll-behavior: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
}

/* 环境光晕（可 drift）+ 噪点 + 柔和暗角 —— 全部零外链 */
body::before {
  content: "";
  position: fixed;
  inset: -22%;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(34% 30% at 22% 18%, rgba(226, 80, 63, 0.22), transparent 70%),
    radial-gradient(32% 28% at 82% 80%, rgba(201, 134, 63, 0.20), transparent 72%),
    radial-gradient(26% 22% at 62% 8%, rgba(232, 183, 104, 0.10), transparent 70%);
  animation: drift 26s ease-in-out infinite alternate;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(120% 100% at 50% 48%, transparent 52%, rgba(0, 0, 0, 0.52) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  background-size: cover, 140px 140px;
  opacity: 0.9;
  mix-blend-mode: normal;
}

@keyframes drift {
  from {
    transform: translate3d(-2%, -1.5%, 0) scale(1);
  }
  to {
    transform: translate3d(3%, 2%, 0) scale(1.07);
  }
}

/* --------------------------------------------------------------- 顶栏 */

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

#topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 22px 8px;
  flex: 0 0 auto;
}

#app-title {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: linear-gradient(180deg, #f6d79c, #c9863f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

#app-subtitle {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: rgba(243, 230, 210, 0.42);
  border-left: 1px solid var(--line-soft);
  padding-left: 12px;
}

#topbar-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
}

#back-home,
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid rgba(201, 134, 63, 0.36);
  background: linear-gradient(180deg, rgba(74, 50, 38, 0.9), rgba(40, 28, 22, 0.9));
  color: var(--porcelain);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: transform 0.12s ease, filter 0.12s ease, box-shadow 0.12s ease;
}

#back-home:hover,
.icon-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.12);
}

#back-home:active,
.icon-btn:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.5);
}

.icon-btn[aria-pressed="true"] {
  color: rgba(243, 230, 210, 0.35);
  border-color: rgba(201, 134, 63, 0.18);
}

/* --------------------------------------------------------------- 舞台 */

#stage {
  flex: 1 1 auto;
  display: flex;
  /* 让「棋盘列 + 侧栏」作为整体居中：否则宽屏下棋盘被高度公式限死后居中，
     侧栏会被推到很远（1920 下曾出现 230px 空隙）。 */
  justify-content: center;
  gap: 18px;
  min-height: 0;
  padding: 0 22px 22px;
}

/* 棋盘列 = 棋盘 + 紧贴其下的操作台。
   flex-basis 直接取棋盘宽度公式，于是操作台与棋盘同宽、只隔一个 gap。 */
#board-col {
  flex: 0 1 calc((100dvh - 150px) * 1.2);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  min-height: 0;
}

#board-wrap {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* 灯箱底盘 */
#board-wrap::before {
  content: "";
  position: absolute;
  inset: 4% 0;
  border-radius: 26px;
  background: radial-gradient(60% 60% at 50% 45%, rgba(232, 183, 104, 0.13), transparent 72%);
  filter: blur(6px);
  pointer-events: none;
}

/* 操作台：横跨棋盘宽度、紧贴棋盘下缘。功能按钮与棋盘的距离就是上面的 12px gap。 */
#console {
  flex: 0 0 auto;
  display: flex;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-plaque);
  border: 1px solid rgba(201, 134, 63, 0.32);
  background: linear-gradient(168deg, rgba(58, 40, 31, 0.92), rgba(32, 22, 18, 0.94));
  box-shadow: var(--shadow-plaque);
}

/* --------------------------------------------------------------- 棋盘 */

#board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: repeat(10, minmax(0, 1fr));
  width: 100%;
  aspect-ratio: 12 / 10;
  padding: 0;
  border-radius: 20px;
  /* ⚠️ 方格线必须由**棋盘容器**统一绘制，不能交给每个格子。
     1) 画在容器上 → 空格自身仍然"不存在"，`x/pair-link/cdp-smoke.mjs` 里
        "隐藏全部空格后截图逐字节不变"的真像素等价性断言继续成立；
     2) 若改成给 .cell 画边框，就又回到"每格一个插座轮廓"的老缺陷上去了。
     两层 1px 渐变按 (100%/12, 100%/10) 平铺，正好落在格线上；
     background-origin 默认 padding-box，而 #board 的 padding 为 0，故与格子严格对齐。 */
  background-color: transparent;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px),
    linear-gradient(180deg, rgba(36, 26, 21, 0.86), rgba(21, 15, 13, 0.92));
  background-size: calc(100% / 12) calc(100% / 10), calc(100% / 12) calc(100% / 10), auto;
  background-repeat: repeat, repeat, no-repeat;
  border: 1px solid rgba(201, 134, 63, 0.26);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.5), 0 18px 44px rgba(0, 0, 0, 0.5);
  outline: none;
  touch-action: none;
}

.cell {
  position: relative;
  display: block;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  appearance: none;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.cell.is-void,
.cell.is-empty {
  cursor: default;
}

/* ⚠️ 空格必须"不存在" —— 这条是本游戏最容易回归的地方，改动前先读：
   1) 瓷片本体：.tile 的 background 用的是 var(--tile-lt, #e8b768) 带**回退色**。
      paintTile() 消除时只 removeAttribute("style")，于是内联变量没了、
      回退色还在 —— 每个消除格会继续画出一枚**没有图案的纯金色方块**，
      整盘看起来永远没被消掉。必须显式把空格的 .tile 关掉。
   2) 格子自身：已消除格与外圈通道一律纯背景，不画边框、不画伪元素。
      棋盘方格线是**容器背景**（见 #board 的注释），不属于格子。
   任何"给空格加回一点装饰"的改动都会与 x/pair-link/cdp-smoke.mjs 里的
   真像素等价性断言冲突（隐藏空格前后截图必须逐字节相同）。 */
.cell.is-empty .tile {
  display: none;
}

.cell:focus {
  outline: none;
}

.tile {
  position: absolute;
  inset: 7%;
  border-radius: 22%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    152deg,
    var(--tile-lt, #e8b768) 0%,
    var(--tile-mid, #c9863f) 48%,
    var(--tile-dk, #8a5a24) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: var(--shadow-tile), inset 0 1px 0 rgba(255, 255, 255, 0.42),
    inset 0 -2px 0 rgba(0, 0, 0, 0.26);
  transition: transform 0.14s ease, box-shadow 0.14s ease;
  will-change: transform;
}

.tile .glyph {
  width: 74%;
  height: 74%;
  display: block;
}

.tile .glyph path {
  fill: rgba(24, 15, 11, 0.86);
}

/* 选中态：铜线呼吸 */
.cell.is-selected .tile {
  transform: translateY(-3px) scale(1.04);
  border-color: rgba(255, 240, 214, 0.72);
  animation: breathe 1.1s ease-in-out infinite;
}

@keyframes breathe {
  0%,
  100% {
    box-shadow: 0 0 0 2px rgba(232, 183, 104, 0.7), 0 0 12px rgba(232, 183, 104, 0.35),
      var(--shadow-tile);
  }
  50% {
    box-shadow: 0 0 0 2px rgba(255, 233, 190, 1), 0 0 28px rgba(232, 183, 104, 0.72),
      var(--shadow-tile);
  }
}

/* 非法配对：朱红抖动 */
.cell.is-invalid .tile {
  animation: shake 0.24s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
  border-color: rgba(226, 80, 63, 0.9);
  box-shadow: 0 0 0 2px rgba(226, 80, 63, 0.7), 0 0 18px rgba(226, 80, 63, 0.45),
    var(--shadow-tile);
}

@keyframes shake {
  10%,
  90% {
    transform: translateX(-3px);
  }
  20%,
  80% {
    transform: translateX(4px);
  }
  30%,
  50%,
  70% {
    transform: translateX(-5px);
  }
  40%,
  60% {
    transform: translateX(5px);
  }
}

/* 提示高亮 */
.cell.is-hint .tile {
  animation: hintPulse 1.5s ease-out both;
}

@keyframes hintPulse {
  0% {
    box-shadow: 0 0 0 3px rgba(255, 240, 214, 0.95), 0 0 26px rgba(232, 183, 104, 0.8),
      var(--shadow-tile);
  }
  60% {
    box-shadow: 0 0 0 3px rgba(232, 183, 104, 0.6), 0 0 18px rgba(232, 183, 104, 0.5),
      var(--shadow-tile);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(232, 183, 104, 0), var(--shadow-tile);
  }
}

/* --------------------------------------------------------------- 冰封壳 */

/* 带壳的瓷片：在母题之上盖一层霜（.tile::after），不动母题本身的形状与配色。
   .is-melted 也要画出同一层霜 —— 它在壳被震碎的瞬间接管，把霜"炸开"淡出。 */
.cell.is-frozen .tile::after,
.cell.is-melted .tile::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    /* 两道裂纹 */
    linear-gradient(122deg, transparent 43%, rgba(255, 255, 255, 0.82) 45%, rgba(255, 255, 255, 0.82) 46.4%, transparent 48.4%),
    linear-gradient(58deg, transparent 61%, rgba(255, 255, 255, 0.55) 62.8%, rgba(255, 255, 255, 0.55) 64%, transparent 65.6%),
    /* 霜体 */
    linear-gradient(160deg, rgba(226, 244, 255, 0.76), rgba(158, 205, 235, 0.42) 52%, rgba(238, 250, 255, 0.68));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.72),
    inset 0 0 16px rgba(150, 205, 240, 0.55),
    0 0 10px rgba(160, 214, 245, 0.3);
}

.cell.is-frozen {
  cursor: not-allowed;
}

/* 点不动：冰蓝短促抖动（与"非法配对"的朱红抖动区分开） */
.cell.is-frozen-hit .tile {
  animation: iceShake 0.42s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
  border-color: rgba(198, 232, 255, 0.95);
  box-shadow: 0 0 0 2px rgba(170, 220, 250, 0.8), 0 0 20px rgba(150, 210, 245, 0.6),
    var(--shadow-tile);
}

@keyframes iceShake {
  10%,
  90% {
    transform: translateX(-2px);
  }
  20%,
  80% {
    transform: translateX(3px);
  }
  30%,
  50%,
  70% {
    transform: translateX(-4px);
  }
  40%,
  60% {
    transform: translateX(4px);
  }
}

/* 壳被震碎：霜层炸开淡出 */
.cell.is-melted .tile::after {
  animation: iceShatter 0.6s cubic-bezier(0.2, 0.8, 0.3, 1) both;
}

@keyframes iceShatter {
  from {
    opacity: 1;
    transform: scale(1);
  }
  60% {
    opacity: 0.72;
    transform: scale(1.14);
  }
  to {
    opacity: 0;
    transform: scale(1.3);
  }
}

/* 焦点环：只对还有瓷片的格子生效（空格子不存在，自然也不该有焦点环）。 */
.cell:focus-visible .tile {
  box-shadow: 0 0 0 2px rgba(243, 230, 210, 0.95), 0 0 16px rgba(243, 230, 210, 0.5);
}

#fx {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
}

/* --------------------------------------------------------------- HUD */

#hud {
  flex: 0 0 322px;
  width: 322px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  min-height: 0;
  overflow-y: auto;
  padding-right: 2px;
}

.plaque {
  position: relative;
  border-radius: var(--radius-plaque);
  border: 1px solid rgba(201, 134, 63, 0.32);
  background: linear-gradient(168deg, rgba(58, 40, 31, 0.92), rgba(32, 22, 18, 0.94));
  box-shadow: var(--shadow-plaque);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.plaque-label {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(232, 183, 104, 0.7);
}

.plaque-value {
  font-size: 24px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1.05;
  color: var(--porcelain);
}

.plaque-value.big {
  font-size: 32px;
  background: linear-gradient(180deg, #fff3d9, #e8b768);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.plaque-sub {
  font-size: 12px;
  color: rgba(243, 230, 210, 0.5);
}

.plaque-level {
  flex-direction: row;
  align-items: baseline;
  gap: 10px;
}

.plaque-level .plaque-label {
  flex: 0 0 auto;
}

.plaque-level .plaque-value {
  margin-left: auto;
}

.plaque-level .plaque-sub {
  flex: 0 0 auto;
}

.timer-body,
.combo-body {
  display: flex;
  align-items: center;
  gap: 12px;
}

#timer-ring,
#combo-ring {
  flex: 0 0 auto;
  overflow: visible;
}

#timer-ring {
  width: 64px;
  height: 64px;
  transform: rotate(-90deg);
}

#combo-ring {
  width: 44px;
  height: 44px;
  transform: rotate(-90deg);
}

.ring-track {
  fill: none;
  stroke: rgba(243, 230, 210, 0.1);
  stroke-width: 5;
}

.ring-fill {
  fill: none;
  stroke: var(--copper-lt);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 188.5;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 0.24s linear, stroke 0.24s ease;
}

#combo-ring .ring-fill {
  stroke-dasharray: 100.5;
  stroke-dashoffset: 100.5;
}

#timer-ring.is-low .ring-fill {
  stroke: var(--crimson);
}

#timer-text {
  font-size: 26px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

#timer-ring.is-low ~ #timer-text {
  color: var(--crimson);
  animation: lowTick 1s ease-in-out infinite;
}

@keyframes lowTick {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
}

.combo-lamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 40px;
  padding: 0 12px;
  border-radius: 12px;
  font-size: 20px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: rgba(243, 230, 210, 0.5);
  border: 1px solid rgba(201, 134, 63, 0.25);
  background: rgba(21, 15, 13, 0.6);
  transition: color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.combo-lamp.is-hot {
  color: #fff3d9;
  border-color: rgba(255, 216, 150, 0.75);
  box-shadow: 0 0 0 1px rgba(255, 216, 150, 0.4), 0 0 22px rgba(232, 183, 104, 0.6);
}

.combo-lamp.flash {
  animation: lampFlash 0.35s ease-out 2;
}

@keyframes lampFlash {
  0%,
  100% {
    box-shadow: 0 0 0 1px rgba(255, 216, 150, 0.3), 0 0 6px rgba(232, 183, 104, 0.25);
  }
  50% {
    box-shadow: 0 0 0 3px rgba(255, 216, 150, 0.85), 0 0 30px rgba(232, 183, 104, 0.85);
  }
}

.star-row {
  display: flex;
  gap: 8px;
}

.star {
  width: 22px;
  height: 22px;
  display: block;
  background: rgba(243, 230, 210, 0.13);
  clip-path: polygon(
    50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%,
    50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%
  );
  transition: background 0.3s ease, filter 0.3s ease, transform 0.3s ease;
}

.star-row.big .star {
  width: 38px;
  height: 38px;
}

.star.is-on {
  background: linear-gradient(180deg, #fff0cd, #d99a45);
  filter: drop-shadow(0 0 8px rgba(232, 183, 104, 0.75));
  transform: scale(1.06);
}

.tool-dock,
.ctrl-dock {
  display: flex;
  gap: 10px;
  flex: 1 1 0;
  min-width: 0;
}

/* 工具盘 / 控制台之间的细分割线，让"道具"与"流程"两组按钮一眼可分 */
.ctrl-dock {
  border-left: 1px dashed rgba(201, 134, 63, 0.28);
  padding-left: 10px;
}

/* 剩余对数：进度条 + 数值，配合方格线便于心算 */
.progress-body {
  display: flex;
  align-items: center;
  gap: 10px;
}

.progress-track {
  flex: 1 1 auto;
  height: 6px;
  border-radius: 999px;
  background: rgba(243, 230, 210, 0.1);
  overflow: hidden;
}

.progress-fill {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #d99a45, #ffe6b0);
  transition: width 0.24s ease;
}

.plaque-progress .plaque-value {
  font-size: 20px;
  min-width: 2ch;
}

.btn {
  flex: 1 1 auto;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 10px 14px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(201, 134, 63, 0.4);
  background: linear-gradient(180deg, rgba(74, 50, 38, 0.96), rgba(43, 30, 24, 0.96));
  color: var(--porcelain);
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: transform 0.12s ease, filter 0.12s ease, box-shadow 0.12s ease;
}

.btn:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: brightness(1.12);
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.5);
}

.btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
  filter: grayscale(0.55);
}

.btn-primary {
  border-color: rgba(255, 216, 150, 0.6);
  background: linear-gradient(180deg, #d99a45, #a86f2a);
  color: #241a15;
  text-shadow: 0 1px 0 rgba(255, 240, 214, 0.35);
}

.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 5px;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  background: rgba(226, 80, 63, 0.88);
  color: #fff4ea;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.btn:disabled .seal {
  background: rgba(120, 96, 82, 0.7);
}

.bump {
  animation: bump 0.34s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes bump {
  0% {
    transform: scale(1);
  }
  45% {
    transform: scale(1.24);
  }
  100% {
    transform: scale(1);
  }
}

/* --------------------------------------------------------------- 覆盖层 */

#overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 20px;
  background: radial-gradient(62% 62% at 50% 44%, rgba(36, 26, 21, 0.84), rgba(12, 8, 7, 0.95));
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
}

#overlay[hidden] {
  display: none;
}

.panel {
  position: relative;
  width: min(420px, 100%);
  max-height: 88vh;
  overflow-y: auto;
  border-radius: 20px;
  border: 1px solid rgba(201, 134, 63, 0.42);
  background: linear-gradient(168deg, rgba(52, 36, 28, 0.98), rgba(26, 18, 15, 0.99));
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.66), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  padding: 24px 24px 20px;
  text-align: center;
  animation: panelIn 0.28s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.panel-wide {
  width: min(560px, 100%);
  text-align: left;
}

.panel[hidden] {
  display: none;
}

@keyframes panelIn {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.panel h2 {
  margin: 0 0 6px;
  font-size: 24px;
  letter-spacing: 0.06em;
  background: linear-gradient(180deg, #fff3d9, #d99a45);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.panel-sub {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(243, 230, 210, 0.62);
}

.panel-progress {
  font-size: 13px;
  color: rgba(243, 230, 210, 0.6);
  margin-bottom: 16px;
}

.panel-progress strong {
  color: var(--copper-lt);
  font-variant-numeric: tabular-nums;
}

/* 开始面板的「今日一盘」条目：霜蓝色调，与主线/无尽的暖铜色区分开。 */
.panel-daily {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 10px 14px;
  margin-bottom: 16px;
  border-radius: 12px;
  background: linear-gradient(140deg, rgba(160, 205, 240, 0.13), rgba(232, 183, 104, 0.07));
  border: 1px solid rgba(170, 214, 245, 0.24);
  font-size: 13px;
  color: rgba(243, 230, 210, 0.72);
}

.panel-daily .daily-label {
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(203, 236, 255, 0.94);
}

.panel-daily .daily-sub {
  flex: 1 1 auto;
  font-size: 12px;
  color: rgba(243, 230, 210, 0.5);
}

.panel-daily .daily-best {
  font-variant-numeric: tabular-nums;
  color: rgba(243, 230, 210, 0.6);
}

.panel-daily .daily-best strong {
  color: var(--copper-lt);
}

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.panel-actions .btn {
  flex: 1 1 130px;
}

/* 结算 */
.result-lines {
  margin: 16px 0 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 12px;
  font-size: 13px;
  text-align: left;
}

.result-lines dt {
  color: rgba(243, 230, 210, 0.58);
}

.result-lines dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  text-align: right;
  color: rgba(243, 230, 210, 0.92);
}

.result-lines > * {
  opacity: 0;
  animation: lineIn 0.34s ease-out both;
}

@keyframes lineIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.result-total {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed rgba(201, 134, 63, 0.35);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(243, 230, 210, 0.62);
}

.result-total strong {
  font-size: 30px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, #fff3d9, #e8b768);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.best-badge {
  margin: 14px auto 0;
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: #241a15;
  background: linear-gradient(180deg, #ffe6b0, #d99a45);
  box-shadow: 0 0 20px rgba(232, 183, 104, 0.6);
  animation: bump 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s both;
}

.best-badge[hidden] {
  display: none;
}

/* 结算粒子 */
.burst {
  position: absolute;
  left: 50%;
  top: 34%;
  width: 0;
  height: 0;
  pointer-events: none;
}

.burst i {
  position: absolute;
  left: 0;
  top: 0;
  width: 7px;
  height: 7px;
  margin: -3.5px 0 0 -3.5px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff3d9, #e8b768 55%, rgba(201, 134, 63, 0) 72%);
  opacity: 0;
  animation: burstOut 0.95s cubic-bezier(0.16, 0.84, 0.44, 1) both;
  animation-delay: var(--delay, 0s);
}

@keyframes burstOut {
  0% {
    opacity: 0;
    transform: translate3d(0, 0, 0) scale(0.5);
  }
  18% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--dx, 0), var(--dy, 0), 0) scale(1.1);
  }
}

/* 玩法说明 */
.help-list {
  margin: 0 0 16px;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.85;
  color: rgba(243, 230, 210, 0.78);
}

.help-list li + li {
  margin-top: 4px;
}

.help-keys {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  margin-bottom: 4px;
}

.help-keys th,
.help-keys td {
  text-align: left;
  padding: 7px 10px;
  border-bottom: 1px solid rgba(243, 230, 210, 0.07);
}

.help-keys th {
  width: 42%;
  color: var(--copper-lt);
  font-weight: 700;
}

.help-keys td {
  color: rgba(243, 230, 210, 0.7);
}

/* 选关 */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: 8px;
  max-height: 46vh;
  overflow-y: auto;
  padding: 2px;
}

.level-btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 8px 4px;
  border-radius: 12px;
  border: 1px solid rgba(201, 134, 63, 0.32);
  background: linear-gradient(180deg, rgba(62, 43, 33, 0.95), rgba(35, 24, 19, 0.95));
  color: var(--porcelain);
  font-family: inherit;
  font-size: 15px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: transform 0.12s ease, filter 0.12s ease;
}

.level-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  filter: brightness(1.14);
}

.level-btn:disabled {
  opacity: 0.36;
  cursor: not-allowed;
  filter: grayscale(0.7);
}

.level-btn .level-stars {
  display: flex;
  gap: 2px;
}

.level-btn .level-stars .star {
  width: 9px;
  height: 9px;
}

/* --------------------------------------------------------------- 杂项 */

#toast {
  position: fixed;
  /* ⚠️ 不能再用"底部居中"：操作台（提示/洗牌/暂停/重玩）就贴在棋盘下缘、横跨棋盘宽度，
     而它正好落在视口底部中央 —— 状态提示会盖住按钮、把点击吃掉（玩家用完提示立刻点暂停
     会点不动）。改到右下角，那里是侧栏下方的空白区。
     pointer-events: none 是第二道保险：状态提示永远不该拦截任何点击。 */
  right: 24px;
  bottom: 26px;
  z-index: 60;
  pointer-events: none;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  color: #241a15;
  background: linear-gradient(180deg, #ffe6b0, #d99a45);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.45);
  animation: toastIn 0.22s ease-out both;
}

#toast[hidden] {
  display: none;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.noscript-tip {
  margin: 24px auto;
  max-width: 520px;
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid rgba(201, 134, 63, 0.4);
  background: rgba(36, 26, 21, 0.9);
  color: #f3e6d2;
  font-size: 14px;
  line-height: 1.8;
  text-align: center;
}

/* --------------------------------------------------------------- 响应式 */

@media (max-width: 899px) {
  #hud {
    flex: 0 0 262px;
    width: 262px;
  }

  #stage {
    gap: 16px;
    padding: 0 16px 16px;
  }

  #topbar {
    padding: 8px 16px 6px;
  }
}

@media (max-width: 768px) {
  #stage {
    flex-direction: column;
    justify-content: flex-start;
    gap: 10px;
    padding: 0 10px 12px;
  }

  /* 移动端：棋盘 → 紧贴其下的操作台 → HUD 网格 */
  #board-col {
    order: 1;
    flex: 0 0 auto;
    width: 100%;
    gap: 8px;
  }

  #board-wrap {
    flex: 0 0 auto;
  }

  #board {
    width: min(100%, calc((100dvh - 340px) * 1.2));
    border-radius: 16px;
  }

  #console {
    padding: 8px;
    gap: 8px;
  }

  .tool-dock,
  .ctrl-dock {
    gap: 8px;
  }

  .ctrl-dock {
    padding-left: 8px;
  }

  #hud {
    order: 2;
    flex: 0 0 auto;
    width: auto;
    overflow: visible;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    justify-content: stretch;
    gap: 8px;
    padding: 0;
  }

  .plaque {
    padding: 7px 9px;
    gap: 2px;
  }

  .plaque-label,
  .plaque-sub,
  #level-name,
  #app-subtitle {
    display: none;
  }

  /* 显式排布，别依赖 DOM 顺序自动填充（否则「得分」跨 4 列会把「星级」挤成半行）：
     第 1 行 关卡 / 时间 / 连击 / 星级；第 2 行 得分；第 3 行 剩余对数。 */
  .plaque-level {
    grid-area: 1 / 1 / 2 / 2;
    justify-content: center;
  }

  .plaque-timer {
    grid-area: 1 / 2 / 2 / 3;
    align-items: center;
  }

  .plaque-combo {
    grid-area: 1 / 3 / 2 / 4;
    align-items: center;
  }

  .plaque-stars {
    grid-area: 1 / 4 / 2 / 5;
    justify-content: center;
  }

  .plaque-score {
    grid-area: 2 / 1 / 3 / 5;
    flex-direction: row;
    align-items: baseline;
    justify-content: center;
    gap: 10px;
  }

  /* 剩余对数整行铺开，进度条才有意义 */
  .plaque-progress {
    grid-area: 3 / 1 / 4 / 5;
  }

  .plaque-progress .plaque-value {
    font-size: 17px;
  }

  .plaque-level .plaque-value {
    margin-left: 0;
  }

  .plaque-value {
    font-size: 19px;
    text-align: center;
  }

  .plaque-value.big {
    font-size: 22px;
  }

  .timer-body,
  .combo-body {
    justify-content: center;
    gap: 6px;
  }

  #timer-ring {
    width: 44px;
    height: 44px;
  }

  #combo-ring {
    display: none;
  }

  #timer-text {
    font-size: 17px;
  }

  .combo-lamp {
    min-width: 34px;
    height: 30px;
    padding: 0 8px;
    font-size: 16px;
  }

  .star-row {
    justify-content: center;
  }

  .star {
    width: 18px;
    height: 18px;
  }

  .btn {
    min-height: 38px;
    font-size: 13px;
    padding: 8px 10px;
  }

  .panel {
    padding: 20px 18px 16px;
  }

  .panel h2 {
    font-size: 20px;
  }
}

@media (max-width: 420px) {
  #topbar {
    padding: 6px 10px 4px;
    gap: 8px;
  }

  #app-title {
    font-size: 16px;
  }

  .icon-btn,
  #back-home {
    width: 30px;
    height: 30px;
  }

  .level-grid {
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  }
}

/* 390px 窄屏兜底：保证不横向溢出 */
@media (max-width: 390px) {
  #stage {
    padding: 0 8px 10px;
  }

  .plaque {
    padding: 6px 7px;
  }

  .btn {
    font-size: 12px;
    min-height: 34px;
    padding: 7px 8px;
  }

  .seal {
    min-width: 18px;
    height: 18px;
    font-size: 11px;
  }

  #timer-text {
    font-size: 15px;
  }

  .level-grid {
    grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
  }
}

/* --------------------------------------------------------------- 动效降级 */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  body::before {
    animation: none;
  }

  .burst {
    display: none;
  }

  .result-lines > * {
    opacity: 1;
  }

  .best-badge {
    opacity: 1;
  }
}