/* 磁贴白板：搪瓷白板 + 铝框笔槽 + 注塑磁贴 */

@font-face {
  font-family: "Magnet Pinyin";
  src: url("fonts/andika-bold.woff2") format("woff2");
  font-weight: 700;
  font-display: block;
}
@font-face {
  font-family: "Magnet Pinyin";
  src: url("fonts/andika-regular.woff2") format("woff2");
  font-weight: 400;
  font-display: block;
}
@font-face {
  font-family: "WenKai";
  src: url("fonts/wenkai-medium.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --board: #f3f5f4;
  --wall: #d6dbde;
  --frame: #c5cbd0;
  --frame-hi: #e3e7ea;
  --frame-mid: #c9d0d5;
  --frame-lo: #a2abb2;
  --frame-edge: #858e95;
  --tray: #c4cbd0;
  --ink: #1b1d22;
  --ink-2: #464e55;
  --ink-3: #6b747b;
  --rule: #a6bcc1;
  --rule-base: #7f9da4;

  --sm: #1f5bd8;
  --sm-side: #143e9c;
  --ym: #e5412d;
  --ym-side: #a82b1b;
  --zt: #2e9e4f;
  --zt-side: #1d6e36;
  --star: #f7c600;
  --star-edge: #d29b00;

  --plastic: #fbfcfc;
  --plastic-side: #bfc6cc;

  --pinyin: "Magnet Pinyin", system-ui, sans-serif;
  --kai: "WenKai", "Kaiti SC", "STKaiti", "KaiTi", serif;

  /* 一种动法：所有移动都是 0.4s 指数减速，干脆利落；唯一的"压一下"留给猛一碰 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --out: cubic-bezier(0.16, 1, 0.3, 1);
  --t: 400ms;

  --shadow-mag: 0 0.04em 0.02em rgb(18 28 40 / 0.28), 0 0.07em 0.06em rgb(18 28 40 / 0.1);
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--frame);
  color: var(--ink);
  font-family: var(--kai);
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  overflow: hidden;
  overscroll-behavior: none;
}
button { font: inherit; color: inherit; }
button, [role="tab"] {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  cursor: pointer;
}
:focus { outline: none; }
:focus-visible { outline: 3px solid var(--sm); outline-offset: 4px; border-radius: 12px; }
::selection { background: rgb(247 198 0 / 0.45); color: var(--ink); }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ico { width: 1em; height: 1em; display: block; }
[hidden] { display: none !important; }

/* ---------- 白板与铝框 ---------- */

.whiteboard {
  height: 100vh;
  height: 100dvh;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  padding: max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) 0 max(10px, env(safe-area-inset-left));
  background: var(--wall);
}

.board {
  position: relative;
  min-height: 0;
  background: var(--board);
  background-clip: padding-box;
  /* 铝合金边框：四条边斜接，迎光的上、左边亮，背光的右、下边暗 */
  border: 12px solid;
  border-color: var(--frame-hi) var(--frame-lo) var(--frame-lo) var(--frame-mid);
  border-bottom-width: 0;
  border-radius: 14px 14px 0 0;
  box-shadow:
    0 0 0 1px var(--frame-edge),
    inset 0 0 0 1px rgb(110 120 128 / 0.55),
    inset 0 3px 4px rgb(40 52 62 / 0.22);
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(260px, 30%, 400px);
  grid-template-rows: auto minmax(0, 1fr);
  grid-template-areas: "tray tray" "stage margin";
  overflow: hidden;
}

/* ---------- 顶部：今天的磁贴 ---------- */

.tray {
  grid-area: tray;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 18px 6px 24px;
  min-width: 0;
}
.tray-name {
  margin: 0;
  flex: none;
  font-size: 22px;
  color: var(--ink-2);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.tray-row {
  list-style: none;
  margin: 0;
  padding: 10px 6px 12px;
  display: flex;
  align-items: flex-end;
  gap: 6px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--rule) transparent;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.tray-row { padding-inline-end: 28px; }
.tray-row.has-more {
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 56px), transparent);
  mask-image: linear-gradient(to right, #000 calc(100% - 56px), transparent);
}
.tray-row::-webkit-scrollbar { height: 6px; }
.tray-row::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 3px; }
.tray-row li { flex: none; scroll-snap-align: center; }

.tray-mag {
  position: relative;
  border: 0;
  background: none;
  padding: 2px 8px 6px;
  font-size: 36px;
  line-height: 1;
  border-radius: 10px;
  transform: rotate(var(--tilt, -6deg));
  transition: transform var(--t) var(--ease), opacity var(--t) var(--out);
}
.tray-mag:active { transform: rotate(0deg) translateY(2px); }
/* 磁贴被拿到板上后，托盘里只剩一个淡淡的印子 */
.tray-mag.is-out { transform: none; }
.tray-mag.is-out .glyph,
.tray-mag.is-out .poem-chip { opacity: 0.18; text-shadow: none; }
.tray-mag.is-out::after {
  content: "";
  position: absolute;
  inset: 4px 2px 2px;
  border-radius: 10px;
  border: 2px dashed rgb(127 157 164 / 0.55);
}
.tray-mag .mini-star {
  position: absolute;
  right: -2px;
  bottom: -6px;
  width: 22px;
  height: 22px;
  color: var(--star);
  filter: drop-shadow(0 0 0.5px #fff) drop-shadow(0 1px 1px rgb(120 90 0 / 0.45));
}
.tag-new {
  position: absolute;
  top: -10px;
  right: -6px;
  font: 500 13px/1 var(--kai);
  color: #fff;
  background: var(--ym-side);
  padding: 4px 5px 3px;
  border-radius: 6px;
  transform: rotate(8deg);
  box-shadow: 0 1px 2px rgb(120 30 20 / 0.35);
}

.tally {
  flex: none;
  margin: 0;
  position: relative;
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  transform: rotate(-8deg);
}
.tally-star {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--star);
  /* 模切贴纸的白边 */
  filter:
    drop-shadow(2px 0 0 #fff) drop-shadow(-2px 0 0 #fff) drop-shadow(0 2px 0 #fff) drop-shadow(0 -2px 0 #fff)
    drop-shadow(0 2px 2px rgb(60 50 10 / 0.3));
}
.tally span {
  position: relative;
  font: 700 22px/1 var(--pinyin);
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  padding-top: 6px;
}

/* ---------- 磁贴字形：平涂正面 + 同色深一号的侧壁 ---------- */

.glyph {
  font-family: var(--pinyin);
  font-weight: 700;
  color: var(--face);
  white-space: pre;
  /* 侧壁按 0.003em（大字时约 1px）一层层叠出来，边缘不起台阶 */
  text-shadow:
    0 0.003em 0 var(--side), 0 0.006em 0 var(--side), 0 0.009em 0 var(--side), 0 0.012em 0 var(--side),
    0 0.015em 0 var(--side), 0 0.018em 0 var(--side), 0 0.021em 0 var(--side), 0 0.024em 0 var(--side),
    0 0.027em 0 var(--side), 0 0.03em 0 var(--side), 0 0.032em 0 var(--side), 0 0.034em 0 var(--side),
    var(--shadow-mag);
}
[data-cat="sm"] { --face: var(--sm); --side: var(--sm-side); }
[data-cat="ym"] { --face: var(--ym); --side: var(--ym-side); }
[data-cat="zt"] { --face: var(--zt); --side: var(--zt-side); }

/* ---------- 舞台：四线三格 ---------- */

.stage {
  grid-area: stage;
  position: relative;
  min-width: 0;
  min-height: 0;
  container-type: size;
  display: grid;
  place-items: center;
  padding: 0 7%;
  touch-action: pan-y;
}

/* Andika 字体度量（单位 em）：x 高 0.508，升部 0.791，降部 0.239。
   第一线在升部上方留一点空，第三线是基线，第四线在降部下方留一点空——"上格不碰第一根线，中格撑满，下格不碰第四根线"。 */
.staff {
  --top: 0.85em;      /* 第一线到基线 */
  --mid: 0.3422em;    /* 第一线到第二线 */
  --bottom: 0.3em;    /* 基线到第四线 */
  --rule-w: max(1.5px, 0.011em);
  font-size: 18vh;
  font-size: min(46cqh, calc(84cqw / var(--w, 1)));
  position: relative;
  width: 100%;
  height: calc(var(--top) + var(--bottom));
}
.rule {
  position: absolute;
  left: -3%;
  right: -3%;
  height: var(--rule-w);
  background: var(--rule);
  transform: translateY(-50%);
}
.rule.r1 { top: 0; }
.rule.r2 { top: var(--mid); }
.rule.r3 { top: var(--top); background: var(--rule-base); }
.rule.r4 { top: calc(var(--top) + var(--bottom)); }

.row {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: var(--gap, 0.42em);
}

/* 字形行高 = 字体的升 + 降（2500 + 800）/ 2048，基线在 2500 / 2048 处；
   往上挪 0.3707em，基线正好落在第三线上 */
.magnet {
  position: relative;
  border: 0;
  background: none;
  padding: 0 0.03em;
  margin: -0.3707em 0 0;
  font: inherit;
  line-height: 1.6113em;
  height: 1.6113em;
  border-radius: 0.08em;
}
.magnet:focus-visible { outline-width: max(3px, 0.012em); outline-offset: 0.02em; border-radius: 0.06em; }
.magnet .glyph { display: block; }
.magnet > .sticker { top: 0.31em; }

/* 音节、音节词的外壳：本身不偏移，里面每块磁贴各自落在第三线上 */
.host {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--host-gap, 0.5em);
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  color: inherit;
  border-radius: 0.06em;
}
.host > .sticker { top: -0.06em; right: -0.34em; }

.syl {
  display: flex;
  align-items: flex-start;
  gap: var(--part-gap, 0.36em);
  position: relative;
}
.syl.is-joined { --part-gap: 0em; }

/* 磁贴吸上板：从托盘里的斜放状态落下、放平 */
.is-arriving { animation: arrive var(--t) var(--ease) both; }
@keyframes arrive {
  from { transform: translateY(-0.16em) rotate(-7deg); opacity: 0; }
  55% { opacity: 1; }
  to { transform: none; opacity: 1; }
}

/* 找一找：点错的磁贴歪倒、退到一边，不打叉 */
.is-wrong {
  transform: translateY(0.05em) rotate(-9deg);
  opacity: 0.4;
  transition: transform var(--t) var(--ease), opacity var(--t) var(--out);
}

/* 星星贴纸 */
.sticker {
  position: absolute;
  top: -0.06em;
  right: -0.3em;
  width: 0.36em;
  height: 0.36em;
  color: var(--star);
  transform: rotate(var(--r, 10deg));
  filter:
    drop-shadow(0.012em 0 0 #fff) drop-shadow(-0.012em 0 0 #fff) drop-shadow(0 0.012em 0 #fff) drop-shadow(0 -0.012em 0 #fff)
    drop-shadow(0 0.015em 0.015em rgb(80 60 0 / 0.35));
  pointer-events: none;
}
.sticker.is-slapping { animation: slap 340ms var(--ease) both; }
@keyframes slap {
  from { transform: scale(1.8) rotate(calc(var(--r, 10deg) - 30deg)); opacity: 0; }
  40% { opacity: 1; }
  to { transform: rotate(var(--r, 10deg)); opacity: 1; }
}

/* 音节词：指读的手指线 */
.finger {
  position: absolute;
  left: 0;
  top: 1.27em;
  height: 0.05em;
  width: 100%;
  border-radius: 0.03em;
  background: var(--ink);
  transform-origin: left center;
  transform: scaleX(0);
  opacity: 0;
}

/* 汉字答案：白板笔写在磁贴上方 */
.han {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.08em);
  transform: translateX(-50%);
  font: 500 0.42em/1 var(--kai);
  color: var(--ink);
  white-space: nowrap;
  animation: fade-up var(--t) var(--out) both;
}
@keyframes fade-up {
  from { opacity: 0; transform: translate(-50%, 0.2em); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* 镜子：前置摄像头，照着摆口形。按钮贴在白板左下角，镜子打开在左上角 */
.corner {
  grid-area: stage;
  align-self: end;
  justify-self: start;
  margin: 0 0 22px 26px;
  z-index: 1;
}
.mirror {
  position: absolute;
  left: 4%;
  top: 6%;
  width: min(30cqw, 36cqh);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  border: 10px solid var(--sm);
  box-shadow: 0 6px 14px rgb(18 28 40 / 0.25);
  background: #dfe5e8;
  animation: arrive var(--t) var(--ease) both;
}
.mirror video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); display: block; }

/* ---------- 古诗 ---------- */

.poem {
  font-size: min(8.4cqh, 9.6cqw);
  display: grid;
  gap: 0.5em;
  justify-items: center;
}
.poem-title {
  margin: 0 0 0.1em;
  font: 500 0.78em/1 var(--kai);
  color: var(--ink-2);
}
.poem-line {
  position: relative;
  display: flex;
  gap: 0.2em;
  border: 0;
  background: none;
  padding: 0.05em 0.2em;
  opacity: 0.5;
  transition: opacity var(--t) var(--out);
}
.poem-line.is-current { opacity: 1; }
.poem-line ruby { font: 500 1em/1 var(--kai); ruby-position: over; color: var(--ink); }
.poem-line rt { font: 400 0.36em/1.4 var(--pinyin); color: var(--ink-2); letter-spacing: 0; }
.poem-line .sticker { top: 0.15em; right: -0.55em; width: 0.6em; height: 0.6em; }

/* ---------- 右栏：板边批注 + 按钮磁贴 ---------- */

.margin {
  grid-area: margin;
  display: grid;
  grid-template-rows: 1fr auto auto;
  align-content: start;
  gap: 18px;
  padding: 18px 26px 22px 10px;
  min-height: 0;
}
.note {
  align-self: center;
  display: grid;
  gap: 14px;
  font-size: clamp(22px, 2.5vw, 32px);
  line-height: 1.45;
  color: var(--ink);
}
.note p { margin: 0; }
.phrase { display: inline-block; white-space: nowrap; }
.note-line { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; }
.note-tag {
  display: inline-grid;
  place-items: center;
  width: 1.45em;
  height: 1.45em;
  border-radius: 50%;
  border: 2.5px solid currentColor;
  font-size: 0.68em;
  line-height: 1;
  margin-top: 0.2em;
  transform: rotate(-4deg);
}
.note .py { font-family: var(--pinyin); font-weight: 700; letter-spacing: 0.02em; }
.note-rule { color: var(--ink-2); font-size: 0.82em; }
.note-big { font-size: 1.5em; line-height: 1.2; }

.pads {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 22px;
}

/* 圆形按钮磁贴：下层是侧壁，上层是正面，按下去正面贴到侧壁上 */
.pad {
  --d: 96px;
  --lift: calc(var(--d) * 0.07);
  border: 0;
  background: none;
  padding: 0;
  display: grid;
  justify-items: center;
  gap: 8px;
}
.pad-body {
  position: relative;
  width: var(--d);
  height: calc(var(--d) + var(--lift));
  display: block;
}
.pad-body::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--d);
  border-radius: 50%;
  background: var(--side);
  box-shadow: 0 calc(var(--d) * 0.06) calc(var(--d) * 0.12) rgb(18 28 40 / 0.28);
}
.pad-face {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--d);
  height: var(--d);
  border-radius: 50%;
  background: var(--face);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: calc(var(--d) * 0.44);
  transition: transform 120ms var(--out);
}
.pad:active .pad-face,
.pad.is-pressed .pad-face { transform: translateY(var(--lift)); }
.pad-label { font-size: 22px; line-height: 1; color: var(--ink); }
.pad-listen { --face: var(--sm); --side: var(--sm-side); }
.pad-read { --face: var(--ym); --side: var(--ym-side); --d: 128px; }
.pad-mirror { --face: var(--plastic); --side: var(--plastic-side); --d: 72px; }
.pad-mirror .pad-face { color: var(--sm); }
.pad[disabled] { cursor: default; }
.pad[disabled] .pad-face { background: #d5dbdf; color: #f3f5f4; }
.pad[disabled] .pad-body::before { background: #aeb6bc; }
.pad[disabled] .pad-label { color: var(--ink-3); }

/* 正在听：外圈慢慢扩散，只在听的时候出现 */
.pad.is-listening .pad-body::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: var(--d);
  height: var(--d);
  border-radius: 50%;
  border: 4px solid var(--face);
  animation: listen 1.3s var(--out) infinite;
  pointer-events: none;
}
.pad.is-listening .pad-face { transform: translateY(var(--lift)); }
@keyframes listen {
  from { transform: translateY(var(--lift)) scale(1); opacity: 0.7; }
  to { transform: translateY(var(--lift)) scale(1.45); opacity: 0; }
}

.say {
  margin: 0;
  min-height: 1.5em;
  text-align: center;
  font-size: clamp(22px, 2.3vw, 30px);
  line-height: 1.3;
  color: var(--ink);
}
.say.is-good { color: var(--zt-side); }

/* ---------- 笔槽托架 ---------- */

/* 白板下沿伸出的铝槽：槽底 + 前沿挡边，按钮磁贴放在槽里，下沿被挡边挡住一点 */
.ledge {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: end;
  gap: 18px;
  margin: 0 -8px;
  /* 前沿 23px 高，按钮底边落在前沿下 4px：只有侧壁的下半截藏到挡边后面，正面和上半截侧壁都露在外面 */
  padding: 16px calc(max(14px, env(safe-area-inset-right)) + 8px) calc(env(safe-area-inset-bottom) + 19px) calc(max(14px, env(safe-area-inset-left)) + 8px);
  background: var(--tray);
  box-shadow:
    0 0 0 1px var(--frame-edge),
    inset 0 10px 10px -8px rgb(30 40 50 / 0.45);
  border-radius: 4px 4px 0 0;
}
.ledge::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: env(safe-area-inset-bottom);
  height: 23px;
  border-top: 2px solid #f1f4f5;
  background: var(--frame-lo);
  box-shadow: 0 1px 0 var(--frame-edge), 0 8px 10px -4px rgb(30 40 50 / 0.35);
  pointer-events: none;
  z-index: 2;
}

/* 注塑塑料件：下层侧壁 + 上层正面，按下去正面落到侧壁上 */
.piece, .mode, .knob {
  --lift: 5px;
  --pface: var(--plastic);
  --pside: var(--plastic-side);
  position: relative;
  border: 0;
  padding: 0 0 var(--lift);
  background: none;
  color: var(--ink);
  border-radius: 12px;
  transition: transform var(--t) var(--ease);
}
.piece::before, .mode::before, .knob::before {
  content: "";
  position: absolute;
  inset: var(--lift) 0 0;
  border-radius: inherit;
  background: var(--pside);
  box-shadow: 0 5px 8px rgb(30 40 50 / 0.28);
  transition: box-shadow var(--t) var(--ease);
}
.face {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 56px;
  padding: 0 20px;
  border-radius: inherit;
  background: var(--pface);
  font-size: 22px;
  transition: transform 120ms var(--out), background 200ms var(--out);
}
.piece:active .face, .knob:active .face { transform: translateY(var(--lift)); }
.piece .ico { font-size: 28px; color: var(--sm); }
.ledge .piece, .ledge .mode, .ledge .knob { --lift: 8px; }

.modes { display: flex; justify-content: center; gap: 14px; }
.mode { min-width: 116px; }
.mode .face { color: var(--ink); }
/* 没选中的方式躺在槽里：歪一点、正面落下、颜色暗一号；选中的立起来放平 */
.mode[aria-selected="false"] { --pface: #e2e7ea; transform: rotate(-2.5deg); }
.mode[aria-selected="false"]:nth-child(even) { transform: rotate(2deg); }
.mode[aria-selected="false"] .face { transform: translateY(var(--lift)); color: var(--ink-2); }
.mode[aria-selected="false"]::before { box-shadow: 0 2px 3px rgb(30 40 50 / 0.2); }

.steps { display: flex; gap: 12px; }
.knob { border-radius: 50%; }
.knob .face { width: 56px; padding: 0; font-size: 28px; color: var(--ink-2); }
.knob[disabled] { opacity: 0.45; cursor: default; }
.knob[disabled] .face { transform: translateY(var(--lift)); }

/* ---------- 磁贴盒 ---------- */

.case {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  align-items: end;
  background: rgb(60 70 78 / 0.32);
  animation: dim 260ms var(--out) both;
}
@keyframes dim { from { background: rgb(60 70 78 / 0); } }
.case-shell {
  max-height: calc(100dvh - 40px);
  overflow-y: auto;
  overscroll-behavior: contain;
  margin: 0 max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left));
  padding: 18px 22px max(22px, env(safe-area-inset-bottom));
  background: #e6ebee;
  border-radius: 22px 22px 0 0;
  box-shadow: 0 -8px 26px rgb(20 30 40 / 0.25);
  animation: rise 420ms var(--out) both;
  scrollbar-width: thin;
  scrollbar-color: var(--rule) transparent;
}
@keyframes rise { from { transform: translateY(100%); } }
.case-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.case-head h2 { margin: 0; font: 500 30px/1 var(--kai); letter-spacing: 0.06em; }

/* 分格收纳盒：灰蓝塑料隔板之间是一个个凹下去的格子 */
.compartments {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  padding: 9px;
  border-radius: 18px;
  background: #c3ccd2;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.55), 0 1px 0 rgb(80 90 100 / 0.25);
}
.compartment {
  position: relative;
  flex: var(--span, 3) 1 calc(var(--span, 3) * 36px + 120px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 8px;
  min-height: 150px;
  padding: 14px 14px 12px;
  border: 0;
  border-radius: 14px;
  text-align: left;
  background: #edf1f3;
  box-shadow:
    inset 0 7px 10px -3px rgb(40 52 62 / 0.3),
    inset 3px 0 5px -3px rgb(40 52 62 / 0.18),
    inset 0 -2px 0 rgb(255 255 255 / 0.75);
  transition: transform 120ms var(--out);
}
.compartment:active { transform: scale(0.985); }
.compartment.is-here {
  box-shadow:
    inset 0 0 0 3px var(--sm),
    inset 0 9px 10px -3px rgb(40 52 62 / 0.3),
    inset 0 -2px 0 rgb(255 255 255 / 0.75);
}
.comp-name { font-size: 22px; line-height: 1.2; color: var(--ink); }
.comp-heap { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 2px 8px; font-size: 26px; line-height: 1.1; }
.comp-heap .glyph { display: inline-block; transform: rotate(var(--tilt, -5deg)); }
.comp-heap .glyph:nth-child(odd) { translate: 0 3px; }
.comp-heap .poem-chip { font-size: 18px; }
.comp-foot { display: flex; align-items: flex-end; justify-content: space-between; gap: 8px; font-size: 15px; color: var(--ink-2); }
.comp-when { display: flex; flex-wrap: wrap; column-gap: 0.7em; }
.comp-when span { white-space: nowrap; }
.comp-stars { display: inline-flex; align-items: center; gap: 4px; font: 700 16px/1 var(--pinyin); color: var(--ink-2); font-variant-numeric: tabular-nums; }
.comp-stars .ico { color: var(--star); font-size: 20px; filter: drop-shadow(0 1px 1px rgb(120 90 0 / 0.35)); }
.comp-today {
  position: absolute;
  top: -6px;
  right: 14px;
  font-size: 15px;
  padding: 5px 9px 4px;
  background: var(--star);
  color: var(--ink);
  border-radius: 3px;
  transform: rotate(3deg);
  box-shadow: 0 2px 3px rgb(80 60 0 / 0.25);
}

.poem-chip { font-family: var(--kai); font-weight: 500; color: var(--ink); white-space: nowrap; }

.grownups { margin-top: 18px; font-size: 17px; line-height: 1.7; color: var(--ink-2); }
.grownups summary { font-size: 19px; color: var(--ink); padding: 8px 0; cursor: pointer; width: fit-content; }
.grownups summary::marker { color: var(--ink-3); }
.grownups-body { max-width: 70ch; }
.grownups-body p { margin: 0 0 10px; }
.grownups code { font-family: var(--pinyin); font-size: 0.95em; }
.env { color: var(--ym-side); }
.reset {
  margin-left: 12px;
  border: 0;
  padding: 6px 12px;
  border-radius: 8px;
  background: var(--plastic);
  box-shadow: 0 2px 0 0 var(--plastic-side);
  color: var(--ym-side);
  font-size: 16px;
}

/* ---------- 开始 ---------- */

.start {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 26px;
  background: rgb(243 245 244 / 0.9);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
.start.is-leaving { animation: leave 300ms var(--out) both; }
@keyframes leave { to { opacity: 0; visibility: hidden; } }
.pad-start { --d: 168px; }
.pad-start .pad-face { padding-left: 8px; }
.start-hint { margin: 0; font-size: clamp(28px, 4vw, 40px); letter-spacing: 0.06em; }

/* ---------- 竖屏和小屏 ---------- */

@media (orientation: portrait) {
  .board {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto;
    grid-template-areas: "tray" "stage" "margin";
  }
  .margin {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    grid-template-areas: "note pads" "say say";
    align-items: center;
    padding: 6px 26px 20px;
    gap: 10px 22px;
  }
  .note { grid-area: note; }
  .pads { grid-area: pads; }
  .staff { font-size: min(54cqh, calc(84cqw / var(--w, 1))); }
  .say { grid-area: say; }
}

@media (max-width: 700px) {
  .whiteboard { padding: max(6px, env(safe-area-inset-top)) 6px 0; }
  .board { border-width: 8px 8px 0; }
  .margin { grid-template-columns: minmax(0, 1fr); grid-template-areas: "note" "pads" "say"; }
  .note { justify-self: start; }
  .tray { gap: 10px; padding: 8px 10px 0 14px; }
  .tray-name { font-size: 17px; }
  .tray-mag { font-size: 26px; padding: 2px 5px 5px; }
  .tally { width: 56px; height: 56px; }
  .tally span { font-size: 17px; }
  .margin { padding: 4px 14px 14px; gap: 8px 12px; }
  .note { font-size: 19px; gap: 6px; }
  .pads { gap: 12px; }
  .pad { --d: 66px; gap: 4px; }
  .pad-read { --d: 84px; }
  .pad-mirror { --d: 54px; }
  .pad-label { font-size: 17px; }
  .say { font-size: 19px; }
  .ledge { gap: 8px; margin: 0 -6px; padding: 12px 12px calc(env(safe-area-inset-bottom) + 15px); }
  .ledge::after { height: 19px; }
  .face { height: 48px; padding: 0 12px; font-size: 18px; }
  .piece-label { display: none; }
  .piece .ico { font-size: 26px; }
  .modes { gap: 8px; }
  .mode { min-width: 0; }
  .knob .face { width: 48px; font-size: 24px; }
  .steps { gap: 8px; }
  .compartment { min-height: 128px; flex-basis: calc(50% - 5px); }
  .pad-start { --d: 132px; }
}

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