/* ══════════════════════════════════════════════════════════════
   NEW 2048 — 布局与组件
   ══════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; }

/* 元素自带的 display 会盖掉 UA 的 [hidden]{display:none}，这里统一兜底 */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

body {
  display: flex;
  min-height: 100dvh;
  background:
    radial-gradient(120% 90% at 50% -20%, var(--bg-glow-1) 0%, transparent 60%),
    radial-gradient(90% 70% at 110% 110%, var(--bg-glow-2) 0%, transparent 55%),
    var(--c-bg);
}

button { font-family: inherit; color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.01em; }
ul, ol, dl, dd, dt { margin: 0; padding: 0; list-style: none; }

#app {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: max(8px, env(safe-area-inset-top)) 10px max(8px, env(safe-area-inset-bottom));
  overflow: hidden;
  isolation: isolate;
}

/* ── 屏幕切换 ─────────────────────────────────────────────── */
.screen {
  display: none;
  width: 100%;
  max-width: 640px;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.screen.is-active { display: flex; animation: screen-in 0.32s ease both; }

/* ── 按钮 ─────────────────────────────────────────────────── */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border: 1px solid var(--c-line-strong);
  border-radius: 14px;
  background: var(--surface-weak);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover { background: var(--surface-mid); }
.btn:active { transform: scale(0.97); }
.btn:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.btn[disabled] { opacity: 0.4; pointer-events: none; }

.btn--primary {
  background: var(--grad-primary);
  border-color: transparent;
  color: var(--on-primary);
  box-shadow: 0 12px 30px -12px var(--accent-soft);
}
.btn--primary:hover { filter: brightness(1.08); }
.btn--soft {
  background: linear-gradient(var(--surface-mid), var(--surface-weak)), var(--surface-card);
  border-color: var(--c-line-strong);
}
.btn--ghost { background: transparent; border-color: var(--c-line); color: var(--c-text-dim); }
.btn--danger { background: rgba(255, 77, 109, 0.16); border-color: rgba(255, 77, 109, 0.45); color: #ffd7de; }
.btn--link { background: none; border: none; color: var(--c-text-faint); font-size: 12px; text-decoration: underline; padding: 6px; }
.btn--xl { padding: 16px 40px; font-size: 18px; flex-direction: column; gap: 2px; border-radius: 18px; }
.btn--xl small { font-size: 11px; font-weight: 500; opacity: 0.72; }
.btn--block { width: 100%; }

.icon-btn {
  width: 40px; height: 40px; flex: 0 0 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  border: 1px solid var(--c-line);
  background: var(--surface-weak);
  color: var(--c-text-dim);
  font-size: 13px; letter-spacing: 1px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.icon-btn:hover { background: var(--surface-mid); color: var(--c-text); }

/* ── 启动页 ───────────────────────────────────────────────── */
.screen--splash { justify-content: center; gap: 26px; }
.splash__bg {
  position: absolute; inset: -20%;
  background:
    radial-gradient(40% 40% at 30% 30%, var(--glow-1), transparent 70%),
    radial-gradient(45% 45% at 75% 65%, var(--glow-2), transparent 70%);
  filter: blur(10px);
  animation: drift 22s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: -1;
}
.splash__inner { display: flex; flex-direction: column; align-items: center; gap: 22px; text-align: center; }
.logo { display: grid; justify-items: center; line-height: 1; }
.logo__2048 {
  font-family: var(--font-num);
  font-size: clamp(62px, 20vmin, 128px);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 10px 34px var(--accent-soft));
}
.logo__new {
  margin-top: 4px;
  font-size: clamp(13px, 3vmin, 17px);
  letter-spacing: 0.62em;
  color: var(--c-accent);
  text-indent: 0.62em;
}
.logo__sub { margin-top: 10px; font-size: 12px; letter-spacing: 0.28em; color: var(--c-text-faint); }
.splash__tiles { display: flex; gap: 10px; }
.mini {
  display: grid; place-items: center;
  width: clamp(34px, 9vmin, 46px); aspect-ratio: 1;
  border-radius: 10px;
  font-family: var(--font-num); font-weight: 700; font-size: clamp(13px, 3.4vmin, 17px);
  background: var(--t-2); color: var(--t-2-t);
  box-shadow: var(--shadow-tile);
  animation: mini-bob 2.6s ease-in-out infinite;
}
.mini--4 { background: var(--t-4); color: var(--t-4-t); animation-delay: 0.15s; }
.mini--8 { background: var(--t-8); color: #fff; animation-delay: 0.3s; }
.mini--16 { background: var(--t-16); color: #fff; animation-delay: 0.45s; }
.splash__actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.splash__hint { font-size: 12px; color: var(--c-text-faint); margin: 0; }

/* ── 主菜单 ───────────────────────────────────────────────── */
.screen--menu { justify-content: center; gap: 16px; }
.menu__head { display: flex; align-items: baseline; justify-content: space-between; width: 100%; padding: 0 4px; }
.menu__title { font-size: 20px; }
.menu__wallet { display: flex; align-items: baseline; gap: 6px; font-family: var(--font-num); }
.coin { color: var(--c-gold); font-weight: 700; font-size: 17px; }
.coin__label { font-size: 11px; color: var(--c-text-faint); font-family: var(--font); }

.modes { display: grid; gap: 10px; width: 100%; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.mode-card {
  position: relative;
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  text-align: left;
  border: 1px solid var(--c-line);
  border-radius: 16px;
  background:
    linear-gradient(140deg, var(--surface-mid), transparent),
    var(--surface-card);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.14s ease, border-color 0.2s ease, background 0.2s ease;
}
.mode-card::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(90% 130% at 0% 0%, var(--mode-tint, var(--accent-soft)), transparent 62%);
  opacity: 0; transition: opacity 0.25s ease; pointer-events: none;
}
.mode-card:hover { transform: translateY(-2px); border-color: var(--c-line-strong); }
.mode-card:hover::after, .mode-card:focus-visible::after { opacity: 1; }
.mode-card__icon {
  display: grid; place-items: center;
  width: 46px; height: 46px; border-radius: 13px;
  font-size: 20px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--c-line);
}
.mode-card__name { font-size: 16px; font-weight: 700; }
.mode-card__tag { font-size: 11px; color: var(--c-accent); letter-spacing: 0.06em; margin-top: 2px; }
.mode-card__desc { font-size: 12px; color: var(--c-text-dim); margin-top: 5px; line-height: 1.45; }
.mode-card__best { text-align: right; font-family: var(--font-num); font-size: 12px; color: var(--c-text-faint); }
.mode-card__best b { display: block; font-size: 17px; color: var(--c-text); }

.menu__nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; width: 100%; }
.menu__nav .btn { flex: 1 1 96px; padding: 11px 8px; font-size: 13px; flex-direction: column; gap: 4px; }
.menu__nav .btn i { font-style: normal; font-size: 17px; }
.menu__stats { font-size: 12px; color: var(--c-text-faint); text-align: center; line-height: 1.7; }

/* ── 游戏页 ───────────────────────────────────────────────── */
.screen--game { gap: 8px; max-width: 560px; }

.hud { display: flex; align-items: center; gap: 10px; width: 100%; }
.hud__scores { display: flex; gap: 8px; flex: 1; justify-content: center; }
.stat {
  position: relative;
  min-width: 86px; padding: 6px 12px;
  border-radius: 12px;
  border: 1px solid var(--c-line);
  background: var(--surface-card);
  text-align: center;
}
.stat__label { display: block; font-size: 10px; letter-spacing: 0.18em; color: var(--c-text-faint); }
.stat__value { font-family: var(--font-num); font-size: clamp(17px, 4.6vmin, 22px); font-weight: 700; display: block; line-height: 1.2; }
.stat__delta {
  position: absolute; left: 50%; top: 2px;
  transform: translateX(-50%);
  font-family: var(--font-num); font-size: 14px; font-weight: 700;
  color: var(--c-ok); opacity: 0; pointer-events: none;
}
.stat--timer .stat__value { color: var(--c-accent); }
.stat--timer[data-low="1"] .stat__value { color: var(--c-danger); animation: pulse 0.7s ease-in-out infinite; }
.hud__mode { flex: 0 0 auto; }
.chip {
  display: inline-block; padding: 5px 10px; border-radius: 999px;
  font-size: 11px; letter-spacing: 0.08em;
  border: 1px solid var(--c-line-strong); color: var(--c-text-dim);
}

.hud__progress { display: flex; align-items: center; gap: 10px; width: 100%; }
.progress {
  position: relative; flex: 1; height: 7px; border-radius: 999px;
  background: var(--surface-mid); overflow: hidden;
}
.progress__fill {
  height: 100%; width: 0%;
  background: var(--grad-progress);
  box-shadow: 0 0 14px var(--accent-soft);
  transition: width 0.4s cubic-bezier(0.2, 0.8, 0.3, 1);
}
.progress__label { font-size: 11px; color: var(--c-text-faint); white-space: nowrap; font-family: var(--font-num); }

/* ── 棋盘 ─────────────────────────────────────────────────── */
.board-wrap { position: relative; display: grid; place-items: center; }
.board {
  position: relative;
  width: min(92vw, 56vh, 470px);
  aspect-ratio: 1 / 1;
  padding: var(--gap);
  border-radius: calc(var(--radius) + 7px);
  background: var(--board-bg);
  border: 1px solid var(--c-line);
  box-shadow:
    var(--shadow-panel),
    inset 0 0 60px -22px var(--board-glow),
    0 0 0 1px var(--surface-weak);
  touch-action: none;
  transition: box-shadow 0.5s ease, border-color 0.4s ease;
}
.board__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: var(--gap);
  width: 100%; height: 100%;
}
.cell {
  position: relative;
  border-radius: var(--radius);
  background: var(--cell-bg);
  box-shadow: inset 0 1px 0 var(--surface-weak);
  transition: background 0.4s ease;
}
/* 裂隙格：无法生成方块的空洞 */
.cell--rift {
  background: radial-gradient(circle at 50% 50%, #000 12%, rgba(120, 0, 160, 0.32) 58%, rgba(255, 255, 255, 0.03) 70%);
  border: 1px dashed color-mix(in srgb, var(--el-thunder) 60%, transparent);
  animation: rift-breathe 3.4s ease-in-out infinite;
}
.cell--rift { overflow: hidden; }
.cell--blackhole {
  background: radial-gradient(circle at 50% 50%, #000 30%, rgba(90, 0, 40, 0.85) 60%, rgba(255, 60, 90, 0.25) 100%);
  border-color: rgba(255, 60, 90, 0.7);
  animation: rift-breathe 1.1s ease-in-out infinite;
}
.cell--blackhole { overflow: hidden; }

.board__tiles { position: absolute; inset: var(--gap); }
.board__danger {
  position: absolute; inset: -2px; border-radius: inherit;
  pointer-events: none; opacity: 0;
  box-shadow: inset 0 0 0 2px var(--c-danger), inset 0 0 40px rgba(255, 77, 109, 0.35);
  transition: opacity 0.4s ease;
}
.board[data-danger="1"] .board__danger { opacity: 1; animation: danger-pulse 1.1s ease-in-out infinite; }
.board[data-danger="1"] { border-color: rgba(255, 77, 109, 0.5); }

/* ── 方块 ─────────────────────────────────────────────────── */
.tile {
  position: absolute; top: 0; left: 0;
  width: calc((100% - 3 * var(--gap)) / 4);
  height: calc((100% - 3 * var(--gap)) / 4);
  display: grid; place-items: center;
  border-radius: var(--radius);
  font-family: var(--font-num);
  font-weight: 800;
  /* 回退字号（不支持容器查询时）：按位数分级，避免 4/5 位数溢出 */
  font-size: clamp(15px, 8.4vmin, 40px);
  letter-spacing: -0.02em;
  color: var(--tile-text);
  background: var(--t-2);
  box-shadow: var(--shadow-tile), inset 0 1px 0 var(--tile-inset);
  transform: translate3d(
    calc(var(--tx, 0) * (100% + var(--gap))),
    calc(var(--ty, 0) * (100% + var(--gap))), 0);
  transition: transform var(--speed-slide) cubic-bezier(0.22, 0.8, 0.28, 1);
  will-change: transform;
  contain: layout style;
}
/* 字号按「数字位数」分级：在位宽内尽量占满，同时留出边距。
   数值来自实测（node scripts/measure-tiles.mjs，取几何最大值的 ~85%）。
   1 位数故意不取满（几何上限 25cqw），否则单个数字会顶满整格显得笨重。 */
.tile[data-len="1"] { font-size: clamp(15px, 8.4vmin, 40px); }
.tile[data-len="2"] { font-size: clamp(14px, 7.4vmin, 36px); }
.tile[data-len="3"] { font-size: clamp(12px, 5.6vmin, 27px); }
.tile[data-len="4"] { font-size: clamp(11px, 4.4vmin, 21px); }
.tile[data-len="5"] { font-size: clamp(10px, 3.6vmin, 17px); }
.tile[data-len="6"] { font-size: clamp(9px, 3.1vmin, 15px); }

@supports (font-size: 1cqw) {
  .board__tiles { container-type: size; }
  .tile[data-len="1"] { font-size: 15cqw; }
  .tile[data-len="2"] { font-size: 13.5cqw; }
  .tile[data-len="3"] { font-size: 9.5cqw; }
  .tile[data-len="4"] { font-size: 7.2cqw; }
  .tile[data-len="5"] { font-size: 5.7cqw; }
  .tile[data-len="6"] { font-size: 4.9cqw; }
}
.tile__inner { display: block; transform: translateZ(0); }
.tile__badge {
  position: absolute; top: 7%; right: 7%;
  width: 17px; height: 17px;
  line-height: 1;
}
.tile__sub {
  position: absolute; bottom: 5%; left: 0; right: 0;
  text-align: center; font-family: var(--font); font-size: 9px;
  font-weight: 600; letter-spacing: 0.06em; opacity: 0.88;
}
@supports (width: 1cqw) {
  /* 角标与副标题跟着棋盘缩放，桌面端不会显得过小 */
  .tile__badge { width: 4.6cqw; height: 4.6cqw; }
  .tile__sub { font-size: 2.5cqw; }
}

/* 数值配色 */
.tile[data-value="2"] { background: var(--t-2); color: var(--t-2-t); }
.tile[data-value="4"] { background: var(--t-4); color: var(--t-4-t); }
.tile[data-value="8"] { background: var(--t-8); color: var(--t-8-t); }
.tile[data-value="16"] { background: var(--t-16); color: var(--t-16-t); }
.tile[data-value="32"] { background: var(--t-32); color: var(--t-32-t); }
.tile[data-value="64"] { background: var(--t-64); color: var(--t-64-t); }
.tile[data-value="128"] { background: var(--t-128); color: var(--t-128-t); }
.tile[data-value="256"] { background: var(--t-256); color: var(--t-256-t); }
.tile[data-value="512"] { background: var(--t-512); color: var(--t-512-t); }
.tile[data-value="1024"] { background: var(--t-1024); color: var(--t-1024-t); }
.tile[data-value="2048"] { background: var(--t-2048); color: var(--t-2048-t); }
.tile[data-value="4096"] { background: var(--t-4096); color: var(--t-4096-t); }
.tile[data-value="8192"] { background: var(--t-8192); color: var(--t-8192-t); }
.tile[data-value="16384"] { background: var(--t-16384); color: var(--t-16384-t); }
.tile[data-value="32768"] { background: var(--t-32768); color: var(--t-32768-t); }
.tile[data-super="1"] {
  background-size: 220% 220% !important;
  animation: super-shift 5s ease-in-out infinite;
  box-shadow: var(--shadow-tile), 0 0 26px -4px currentColor, inset 0 1px 0 var(--tile-inset);
}
.tile[data-value="2048"][data-super="1"] { background-image: var(--tile-grad-2048); }
.tile[data-value="4096"][data-super="1"] { background-image: var(--tile-grad-4096); }
.tile[data-value="8192"][data-super="1"] { background-image: var(--tile-grad-8192); }
.tile[data-value="16384"][data-super="1"] { background-image: var(--tile-grad-16384); }

/* 元素覆盖 */
.tile[data-element="fire"] { box-shadow: var(--shadow-tile), inset 0 0 0 2px var(--el-fire), 0 0 20px -6px var(--el-fire); }
.tile[data-element="ice"] { box-shadow: var(--shadow-tile), inset 0 0 0 2px var(--el-ice), 0 0 20px -6px var(--el-ice); }
.tile[data-element="poison"] { box-shadow: var(--shadow-tile), inset 0 0 0 2px var(--el-poison), 0 0 20px -6px var(--el-poison); }
.tile[data-element="star"] { box-shadow: var(--shadow-tile), inset 0 0 0 2px var(--el-star), 0 0 22px -6px var(--el-star); }
.tile[data-element="thunder"] { box-shadow: var(--shadow-tile), inset 0 0 0 2px var(--el-thunder), 0 0 22px -6px var(--el-thunder); }
.tile[data-element] .tile__badge { color: #fff; }
.tile[data-element="fire"] { background-image: linear-gradient(150deg, rgba(255, 122, 41, 0.42), transparent 60%); }
.tile[data-element="ice"] { background-image: linear-gradient(150deg, rgba(143, 227, 255, 0.36), transparent 60%); }
.tile[data-element="poison"] { background-image: linear-gradient(150deg, rgba(134, 255, 92, 0.32), transparent 60%); }
.tile[data-element="star"] { background-image: linear-gradient(150deg, rgba(255, 215, 94, 0.4), transparent 60%); }
.tile[data-element="thunder"] { background-image: linear-gradient(150deg, rgba(192, 139, 255, 0.4), transparent 60%); }
/* 元素罩色跟随皮肤的 --el-*，否则换了皮肤还是原版那层颜色（浅色皮肤上尤其突兀） */
@supports (background: color-mix(in srgb, red 50%, blue)) {
  .tile[data-element="fire"] { background-image: linear-gradient(150deg, color-mix(in srgb, var(--el-fire) 44%, transparent), transparent 62%); }
  .tile[data-element="ice"] { background-image: linear-gradient(150deg, color-mix(in srgb, var(--el-ice) 40%, transparent), transparent 62%); }
  .tile[data-element="poison"] { background-image: linear-gradient(150deg, color-mix(in srgb, var(--el-poison) 36%, transparent), transparent 62%); }
  .tile[data-element="star"] { background-image: linear-gradient(150deg, color-mix(in srgb, var(--el-star) 44%, transparent), transparent 62%); }
  .tile[data-element="thunder"] { background-image: linear-gradient(150deg, color-mix(in srgb, var(--el-thunder) 44%, transparent), transparent 62%); }
}
.tile[data-frozen="1"]::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background:
    linear-gradient(135deg, rgba(200, 240, 255, 0.42) 0%, transparent 42%),
    rgba(160, 220, 255, 0.2);
  backdrop-filter: blur(1.5px);
  box-shadow: inset 0 0 0 2px rgba(200, 240, 255, 0.8);
  pointer-events: none;
}

/* 棋盘上方的浮动信息 */
.floating {
  position: absolute; inset: 0;
  pointer-events: none;
  display: block;
}
.float {
  position: absolute;
  display: grid; justify-items: center;
  font-family: var(--font-num);
}
.float--combo { left: 50%; top: 50%; transform: translate(-50%, -50%); }
.float--maxtile { right: -6px; top: -6px; padding: 6px 9px; border-radius: 12px; background: var(--c-panel); border: 1px solid var(--c-line); }
.float__num { font-size: 22px; font-weight: 800; line-height: 1; }
.float__cap { font-size: 9px; letter-spacing: 0.18em; color: var(--c-text-faint); font-family: var(--font); }
.float--maxtile .float__num { font-size: 16px; color: var(--c-accent); }

/* ── 底部控制台 ───────────────────────────────────────────── */
.dock { display: grid; gap: 9px; width: 100%; }
.energy { display: grid; gap: 5px; }
.energy__bar {
  position: relative; height: 12px; border-radius: 999px;
  background: var(--surface-mid);
  border: 1px solid var(--c-line);
  overflow: hidden;
}
.energy__fill {
  height: 100%; width: 0%;
  background: var(--grad-energy);
  box-shadow: 0 0 16px var(--accent-soft);
  transition: width 0.28s ease-out;
}
.energy__fill[data-full="1"] { background: linear-gradient(90deg, #ffd166, #ff7a29, #ff2e63); animation: pulse 0.8s ease-in-out infinite; }
.energy__meta { display: flex; align-items: baseline; gap: 8px; font-size: 11px; color: var(--c-text-faint); }
.energy__value { font-family: var(--font-num); color: var(--c-text-dim); }
.energy__effect { margin-left: auto; }

.items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.item-btn {
  position: relative;
  display: grid; gap: 2px; justify-items: center;
  padding: 9px 6px;
  border-radius: 13px;
  border: 1px solid var(--c-line);
  background: var(--surface-card);
  cursor: pointer;
  transition: transform 0.12s ease, background 0.2s, border-color 0.2s;
}
.item-btn:hover:not([disabled]) { background: var(--surface-mid); border-color: var(--c-line-strong); }
.item-btn:active:not([disabled]) { transform: scale(0.96); }
.item-btn[disabled] { opacity: 0.34; cursor: default; }
.item-btn__icon { font-size: 17px; }
.item-btn__name { font-size: 11px; color: var(--c-text-dim); }
.item-btn__count {
  position: absolute; top: 4px; right: 6px;
  font-family: var(--font-num); font-size: 11px; font-weight: 700;
  color: var(--c-accent);
}
.item-btn__key { position: absolute; left: 6px; top: 4px; font-size: 9px; color: var(--c-text-faint); }
.dock__tips { text-align: center; font-size: 11px; color: var(--c-text-faint); min-height: 14px; }

/* ── 覆盖层 / 面板 ────────────────────────────────────────── */
.overlay {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  padding: 18px;
  background: rgba(4, 6, 14, 0.72);
  backdrop-filter: blur(7px);
  animation: fade-in 0.22s ease both;
}
.overlay[hidden] { display: none; }
.panel {
  width: min(100%, 520px);
  max-height: 88dvh;
  display: flex; flex-direction: column;
  padding: 20px;
  gap: 14px;
  border-radius: 22px;
  border: 1px solid var(--c-line-strong);
  background: var(--c-panel);
  box-shadow: var(--shadow-panel);
  animation: panel-in 0.28s cubic-bezier(0.2, 0.9, 0.3, 1) both;
}
.panel--sm { width: min(100%, 380px); }
.panel--result { width: min(100%, 460px); }
.panel__title { font-size: 19px; display: flex; align-items: baseline; gap: 8px; }
.panel__title small { font-size: 12px; color: var(--c-text-faint); font-weight: 500; }
.panel__text { font-size: 14px; color: var(--c-text-dim); line-height: 1.6; margin: 0; }
.panel__body { display: grid; gap: 10px; }
.panel__body--stack { gap: 8px; }
.panel__body.scroll { overflow-y: auto; max-height: 60dvh; padding-right: 4px; }
.panel__actions { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }

.result__head { display: grid; gap: 4px; }
.result__sub { margin: 0; font-size: 12px; color: var(--c-text-faint); }
.result__score { display: grid; justify-items: center; gap: 2px; padding: 6px 0 2px; }
.result__score-label { font-size: 11px; letter-spacing: 0.2em; color: var(--c-text-faint); }
.result__score strong {
  font-family: var(--font-num); font-size: clamp(34px, 11vmin, 52px); font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.result__record { font-size: 12px; font-weight: 700; color: var(--c-gold); }
.result__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.result__grid > div {
  padding: 9px 8px; border-radius: 12px; text-align: center;
  background: var(--surface-weak); border: 1px solid var(--c-line);
}
.result__grid dt { font-size: 10px; color: var(--c-text-faint); letter-spacing: 0.1em; }
.result__grid dd { font-family: var(--font-num); font-size: 16px; font-weight: 700; margin-top: 3px; }
.result__achievements h3 { font-size: 12px; color: var(--c-gold); letter-spacing: 0.1em; margin-bottom: 6px; }
.result__achievements ul { display: grid; gap: 6px; }
.result__achievements li {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--c-text-dim);
  padding: 7px 10px; border-radius: 10px;
  background: rgba(255, 200, 87, 0.08); border: 1px solid rgba(255, 200, 87, 0.24);
}
.result__achievements b { color: var(--c-text); font-weight: 600; }

/* 皮肤卡片 */
.skin {
  display: grid; gap: 9px;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid var(--c-line);
  background: var(--surface-card);
  transition: border-color 0.2s ease, transform 0.14s ease;
}
.skin--active { border-color: var(--c-gold); box-shadow: 0 0 0 1px var(--c-gold) inset; }
.skin--locked { opacity: 0.68; }
.skin__head { display: flex; align-items: center; gap: 11px; }
.skin__icon { font-size: 22px; width: 28px; text-align: center; flex: 0 0 28px; }
.skin__meta { flex: 1; min-width: 0; }
.skin__name { font-size: 14px; font-weight: 650; display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.skin__tag { font-size: 11.5px; color: var(--c-text-faint); margin-top: 3px; line-height: 1.45; }
.skin__preview {
  display: flex; gap: 6px; padding: 9px 10px; border-radius: 12px;
  border: 1px solid var(--c-line);
}
.skin-chip {
  flex: 1; display: grid; place-items: center;
  aspect-ratio: 1.35; border-radius: 7px;
  font-family: var(--font-num); font-weight: 800; font-size: 11px;
  box-shadow: inset 0 1px 0 var(--tile-inset);
}
.skin__req { font-size: 11px; color: var(--c-text-faint); }
.skin--active .skin__req { color: var(--c-gold); }
.skin .btn { padding: 8px 12px; font-size: 12.5px; }

/* 列表（成就 / 商店 / 排行榜） */
.row {
  display: flex; align-items: center; gap: 11px;
  padding: 11px 13px;
  border-radius: 14px;
  border: 1px solid var(--c-line);
  background: var(--surface-card);
}
.row--locked { opacity: 0.5; }
.row--owned { border-color: rgba(255, 200, 87, 0.45); background: rgba(255, 200, 87, 0.09); }
.row__icon { font-size: 22px; width: 30px; text-align: center; flex: 0 0 30px; }
.row__main { flex: 1; min-width: 0; }
.row__title { font-size: 14px; font-weight: 650; display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.row__desc { font-size: 11.5px; color: var(--c-text-faint); margin-top: 2px; line-height: 1.45; }
.row__side { text-align: right; font-family: var(--font-num); font-size: 13px; color: var(--c-text-dim); flex: 0 0 auto; }
.row__tag { font-size: 10px; padding: 2px 6px; border-radius: 999px; background: var(--surface-mid); color: var(--c-text-dim); font-family: var(--font); }
.tag--gold { background: rgba(255, 200, 87, 0.2); color: var(--c-gold); }
.tag--run { background: var(--accent-soft); color: var(--c-accent); }
.tag--meta { background: rgba(169, 123, 255, 0.18); color: var(--c-accent-2); }
.lb-row__rank { font-family: var(--font-num); font-size: 15px; width: 26px; color: var(--c-text-faint); }
.lb-row__rank[data-top="1"] { color: var(--c-gold); }
.lb-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.lb-tabs .btn { padding: 7px 12px; font-size: 12px; }
.lb-tabs .btn[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent-line); color: var(--c-text); }

/* 设置项 */
.setting { display: flex; align-items: center; gap: 12px; padding: 9px 4px; }
.setting__main { flex: 1; }
.setting__title { font-size: 14px; }
.setting__desc { font-size: 11px; color: var(--c-text-faint); margin-top: 2px; }
.switch {
  position: relative; width: 48px; height: 27px; flex: 0 0 48px;
  border-radius: 999px; border: 1px solid var(--c-line-strong);
  background: var(--surface-mid); cursor: pointer; transition: background 0.2s, border-color 0.2s;
}
.switch::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 19px; height: 19px; border-radius: 50%;
  background: var(--c-text-dim); transition: transform 0.2s ease, background 0.2s;
}
.switch[aria-checked="true"] { background: var(--accent-soft); border-color: var(--accent-line); }
.switch[aria-checked="true"]::after { transform: translateX(21px); background: #fff; }
.seg { display: flex; gap: 4px; flex-wrap: wrap; }
.seg button {
  padding: 7px 11px; font-size: 12px; border-radius: 10px;
  border: 1px solid var(--c-line); background: var(--surface-weak); cursor: pointer;
}
.seg button[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent-line); }

/* 玩法说明 */
.help { gap: 14px; font-size: 13px; line-height: 1.62; color: var(--c-text-dim); }
.help h3 { font-size: 13px; color: var(--c-accent); letter-spacing: 0.08em; margin-bottom: 6px; }
.help p { margin: 0 0 6px; }
.help ul { display: grid; gap: 5px; }
.help li { padding-left: 15px; position: relative; }
.help li::before { content: "▸"; position: absolute; left: 0; color: var(--c-accent-2); }
.help b { color: var(--c-text); font-weight: 650; }
.help code {
  font-family: var(--font-num); font-size: 11.5px; padding: 1px 5px; border-radius: 5px;
  background: var(--surface-mid); color: var(--c-text);
}

/* ── Toast ────────────────────────────────────────────────── */
.toasts {
  position: fixed; left: 50%; bottom: max(16px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 200;
  display: grid; gap: 7px; justify-items: center;
  pointer-events: none;
  width: min(92vw, 420px);
}
.toast {
  padding: 9px 15px; border-radius: 12px;
  font-size: 13px; font-weight: 600;
  background: var(--c-panel);
  border: 1px solid var(--c-line-strong);
  box-shadow: var(--shadow-panel);
  animation: toast-in 0.26s cubic-bezier(0.2, 0.9, 0.3, 1) both;
}
.toast[data-kind="gold"] { border-color: rgba(255, 200, 87, 0.6); color: var(--c-gold); }
.toast[data-kind="good"] { border-color: rgba(55, 229, 154, 0.5); }
.toast[data-kind="bad"] { border-color: rgba(255, 77, 109, 0.5); }
.toast.is-out { animation: toast-out 0.24s ease forwards; }

/* ── 响应式 ───────────────────────────────────────────────── */
@media (max-height: 700px) {
  .board { width: min(88vw, 46vh, 420px); }
  .dock { gap: 6px; }
  .energy__bar { height: 9px; }
  .floating .float--maxtile { display: none; }
}
@media (min-width: 900px) and (min-height: 760px) {
  .screen--game { max-width: 680px; }
  .board { width: min(62vw, 63vh, 560px); }
  .hud__scores { max-width: 320px; }
  .dock { gap: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}
#app[data-motion="reduced"] *, #app[data-motion="reduced"] *::before, #app[data-motion="reduced"] *::after {
  animation-duration: 0.001ms !important;
  transition-duration: 0.001ms !important;
}