:root {
  --bg: #fff6f1;
  --surface: #ffffff;
  --text: #2b1a1d;
  --muted: #7a6266;
  --primary: #c8364b;
  --primary-text: #ffffff;
  --border: #f0d9d2;
  --correct: #1f9d55;
  --correct-bg: #e5f7ec;
  --wrong: #d64545;
  --wrong-bg: #fdeaea;
  --star: #f5b301;
  --help: #3aa0ff; /* a star earned with help (💡) */
  /* Progress status colors, checked for color-blind separation and contrast. */
  --prog-known: #1f7fb8;
  --prog-learning: #d99a1e;
  --prog-hard: #d64545;
  --radius: 18px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1416;
    --surface: #2b2023;
    --text: #fff1ee;
    --muted: #c4a9ad;
    --primary: #ff7f8f;
    --primary-text: #23090d;
    --border: #4a3539;
    --correct: #4cd486;
    --correct-bg: #183627;
    --wrong: #ff7b7b;
    --wrong-bg: #3d1d24;
    --prog-known: #3a86c4;
    --prog-learning: #b8801f;
    --prog-hard: #d04f6a;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
  overscroll-behavior: none;
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  min-height: 100%;
  padding: max(12px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right))
    max(16px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
}

.screen { display: none; }
#screen-play.active {
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 14px;
  height: calc(100dvh - 28px);
}
#screen-settings.active { display: flex; flex-direction: column; gap: 16px; }
#screen-map.active { display: flex; flex-direction: column; gap: 14px; height: calc(100dvh - 28px); }
/* Only the game uses the full width of a tablet; reading screens stay narrow. */
#screen-settings, .picker { max-width: 720px; margin: 0 auto; }

[hidden] { display: none !important; }

/* Opening the app: its icon and name, until the players can show. */
#screen-start.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: calc(100dvh - 28px);
}
.start-icon { width: 112px; height: 112px; border-radius: 26px; animation: breathe 1.6s ease-in-out infinite; }
.start-name { margin: 0; font-size: 1.6rem; font-weight: 800; color: var(--primary); letter-spacing: 0.5px; }
.start-dots { display: flex; gap: 8px; margin: 0; }
.start-dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); opacity: 0.25; animation: start-dot 1.2s ease-in-out infinite; }
.start-dots span:nth-child(2) { animation-delay: 0.2s; }
.start-dots span:nth-child(3) { animation-delay: 0.4s; }
/* The first time: what downloads to work offline (offline.js), one row and bar per part. */
.prepare { width: min(420px, 100%); display: flex; flex-direction: column; gap: 10px; padding: 0 8px; text-align: left; }
.prepare h2 { margin: 8px 0 0; font-size: 1.2rem; text-align: center; }
.prepare p { margin: 0; color: var(--muted); font-size: 0.95rem; text-align: center; }
.prepare-list { list-style: none; margin: 6px 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.prepare-list li { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; font-weight: 600; }
.prepare-size { color: var(--muted); font-weight: 400; font-variant-numeric: tabular-nums; }
.prepare-bar { grid-column: 1 / -1; height: 8px; border-radius: 4px; background: color-mix(in srgb, var(--primary) 15%, transparent); overflow: hidden; }
.prepare-bar span { display: block; height: 100%; width: 0; border-radius: 4px; background: var(--primary); transition: width 0.3s; }
.prepare-list li.ready .prepare-size::after { content: ' ✓'; color: var(--correct); font-weight: 700; }
.prepare-list li.failed .prepare-bar span { background: var(--muted); }
.prepare-status { min-height: 1.4em; }
.prepare .btn-small { align-self: center; }
@keyframes start-dot { 40% { opacity: 1; transform: translateY(-4px); } }
@media (prefers-reduced-motion: reduce) {
  .start-icon, .start-dots span { animation: none; }
}
button { font: inherit; color: inherit; cursor: pointer; touch-action: manipulation; }

/* ---------- top bar ---------- */

.topbar { display: flex; align-items: center; gap: 4px; }
/* The stars take the room the buttons leave, each at most a tenth of it, so the bar fits a
   narrow phone whatever buttons show (container query units). */
.stars { flex: 1; min-width: 0; display: flex; justify-content: center; gap: 1px; font-size: clamp(0.85rem, 4.4vw, 2rem); container-type: inline-size; }
.star { color: var(--border); transition: color 0.2s ease, transform 0.3s ease; font-size: min(1em, 9cqi); }
.star.on { color: var(--star); transform: scale(1.15); }
.star.miss { color: var(--wrong); }
.star.help { color: var(--help); }

.parents-btn {
  flex: none;
  position: relative;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  padding: 8px;
  opacity: 0.6;
}
.parents-btn svg { width: 100%; height: 100%; fill: var(--muted); }
.map-btn { flex: none; width: 40px; height: 44px; border: none; background: transparent; padding: 0; font-size: 1.7rem; }
.map-btn:active { transform: scale(0.92); }
/* 👀 in the card's top-left corner, faint like ⏸ opposite until a grown-up turns it on. */
.watch-btn {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 3;
  width: 48px;
  height: 48px;
  padding: 0;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 50%;
  background: color-mix(in srgb, var(--border) 70%, transparent);
  font-size: 1.5rem;
  line-height: 1;
}
.watch-btn:not(.on) { filter: grayscale(0.4); opacity: 0.7; }
.watch-btn.on { background: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 35%, transparent); }
.watch-btn:active { transform: scale(0.92); }
.lock-btn[hidden] { display: none; }
.watch-btn[hidden], .card.held .watch-btn, .card.celebrate .watch-btn { display: none; }

/* A grown-up watching: the refused reading waiting for their verdict, at the top of the card. */
.watch-strip {
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 6px 6px 12px;
  border-radius: 16px;
  background: var(--primary);
  color: var(--primary-text);
  font-weight: 700;
}
.watch-strip[hidden] { display: none; }
/* Meanwhile the card's corner buttons (🔊 / 💡, ⏸) make room: the answer waits for the grown-up. */
.card.held .pause-btn, .card.held .help-btn { display: none; }
.watch-question { flex: 1; min-width: 0; }
.watch-action { flex: none; width: 44px; height: 44px; border: none; border-radius: 12px; background: var(--surface); color: var(--text); font-size: 1.3rem; font-weight: 800; }
.watch-action:disabled { opacity: 0.4; }
.watch-yes { color: var(--correct); }
.watch-no { color: var(--wrong); }

/* ---------- character card ---------- */

.card {
  position: relative;
  min-height: 0;
  background: var(--surface);
  border: 4px solid var(--border);
  border-radius: 28px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.card.correct, .card.celebrate { background: var(--correct-bg); border-color: var(--correct); }
.card.celebrate { overflow: hidden; } /* the animal's parade starts off the card */
.card.shown { border-color: var(--primary); }
.card.wrong { background: var(--wrong-bg); border-color: var(--wrong); animation: shake 0.35s; }
.card.celebrate .feedback { color: var(--star); letter-spacing: 2px; animation: bounce 0.6s ease infinite alternate; }

@keyframes shake {
  25% { transform: translateX(-10px); }
  50% { transform: translateX(10px); }
  75% { transform: translateX(-5px); }
}
@keyframes bounce { to { transform: scale(1.25); } }
.card.celebrate .feedback { font-size: clamp(4rem, 22vw, 7rem); }
.card.celebrate .prompt { opacity: 0.15; transition: opacity 0.4s ease; }

.confetti {
  position: fixed;
  top: -12px;
  width: 10px;
  height: 14px;
  border-radius: 2px;
  z-index: 10;
  pointer-events: none;
  animation: fall linear forwards;
}
.confetti.animal { width: 2.6rem; height: auto; border-radius: 0; }
@keyframes fall {
  to { transform: translate(var(--drift), 105vh) rotate(var(--spin)); }
}

/* End of round: the player's animal celebrates over the faded character. The box moves it
   around the card (pop-in, parade); the animal moves itself (see app.js, CHEERS). */
.cel-animal {
  position: absolute;
  top: 6%;
  left: 50%;
  z-index: 2;
  width: clamp(5rem, 26vw, 9rem);
  transform: translateX(-50%);
  pointer-events: none;
}
.cel-animal { animation: pop-in 0.4s ease-out both; }
.cel-parade { animation: parade 3.6s ease-in-out both; }

@keyframes pop-in { from { transform: translateX(-50%) scale(0); } }
/* In from the left, across to the right, back to the middle, then a twirl. */
@keyframes parade {
  0% { left: -20%; }
  35% { left: 85%; }
  65% { left: 50%; transform: translateX(-50%) scale(1) rotate(0); }
  85% { transform: translateX(-50%) scale(1.35) rotate(360deg); }
  100% { left: 50%; transform: translateX(-50%) scale(1.2) rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
  .cel-animal { animation: none !important; }
}

/* A player's animal in a button or a tile: as big as the emoji it replaced (font-size). */
.animal-pic { display: inline-block; width: 1.2em; vertical-align: middle; }
.animal-pic svg { display: block; }
.player-btn .animal-pic { width: 1.45em; }

.feedback { min-height: 3rem; font-size: clamp(2rem, 9vw, 3rem); font-weight: 800; text-align: center; line-height: 1.2; }
.card.correct .feedback { color: var(--correct); }
.card.wrong .feedback { color: var(--wrong); }
.card.shown .feedback { color: var(--primary); }

.start {
  display: none;
  position: absolute;
  inset: 0;
  margin: auto;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  box-shadow: 0 10px 30px color-mix(in srgb, var(--primary) 45%, transparent);
  animation: breathe 1.6s ease-in-out infinite;
}
.start svg { width: 64px; height: 64px; fill: var(--primary-text); margin-left: 8px; }
.card.syncing .start { opacity: 0.4; } /* back in the app: waiting for what changed elsewhere */
.card.waiting .start { display: grid; place-items: center; }
/* Pause, in the card's corner while a character is being answered. */
.pause-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 3;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 50%;
  background: color-mix(in srgb, var(--border) 70%, transparent);
}
.pause-btn svg { width: 24px; height: 24px; fill: var(--muted); }
.card.waiting .pause-btn, .card.celebrate .pause-btn { display: none; }
/* In the card's bottom-left corner, near the child's hands (the coin jar has the other). */
.help-btn {
  position: absolute;
  bottom: 10px;
  left: 10px;
  z-index: 3;
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 50%;
  background: color-mix(in srgb, var(--star) 25%, var(--surface));
  font-size: 1.7rem;
}
/* A character never seen before: a little nudge toward the help. */
.help-btn.nudge { animation: nudge 2.4s infinite ease-in-out; }
@media (prefers-reduced-motion: reduce) { .help-btn.nudge { animation: none; } }
.card.waiting .help-btn, .card.celebrate .help-btn { display: none; }
.card.waiting .prompt, .card.waiting .feedback { opacity: 0.25; }
@keyframes breathe { 50% { transform: scale(1.08); } }

/* ---------- microphone ---------- */

.mic {
  position: relative;
  justify-self: center;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  display: grid;
  place-items: center;
}
.mic { touch-action: none; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.mic svg { grid-area: 1 / 1; width: 42px; height: 42px; fill: var(--muted); position: relative; }
.mic .icon-slash { display: none; }
.mic-level {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0;
  transition: transform 0.1s linear;
}
.mic[data-mode="on"] { background: var(--primary); }
/* Ready: waiting for the child's tap to say the character; a gentle nudge. */
.mic[data-mode="ready"] { background: var(--surface); box-shadow: inset 0 0 0 4px var(--primary); animation: nudge 2.4s infinite ease-in-out; }
.mic[data-mode="ready"] svg { fill: var(--primary); }
@keyframes nudge { 0%, 70%, 100% { transform: scale(1); } 80% { transform: scale(1.08); } 90% { transform: scale(0.98); } }
@media (prefers-reduced-motion: reduce) { .mic[data-mode="ready"] { animation: none; } }
.mic[data-mode="on"] svg { fill: var(--primary-text); }
.mic[data-mode="on"] .mic-level { opacity: 0.3; }
/* A quick tap on the microphone: a little shake, as it only listens while held. */
.mic.hold-me { animation: shake 0.35s; }
/* While 💡 teaches: gone (its place kept, so nothing moves), as dimmed wasn't clear enough
   for a child; it can't be pressed. */
.mic:disabled { visibility: hidden; }
/* Loading the voice: no microphone yet, but the player's animal turning, which can't be
   tapped, so it doesn't look ready to play. */
.mic-animal { display: none; grid-area: 1 / 1; font-size: 3rem; line-height: 1; }
.mic[data-mode="loading"] { background: transparent; box-shadow: none; pointer-events: none; }
.mic[data-mode="loading"] svg, .mic[data-mode="loading"] .mic-level { display: none; }
.mic[data-mode="loading"] .mic-animal { display: block; animation: turn 1.8s infinite linear; }
.mic .mic-animal svg { display: block; width: 100%; height: auto; position: static; }
@keyframes turn { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .mic[data-mode="loading"] .mic-animal { animation: pulse 1.2s infinite ease-in-out; } }
/* Off (before ▶ or while paused) looks plain; only a microphone that failed is crossed out. */
.mic[data-mode="error"] .icon-slash { display: block; }
.mic[data-mode="error"] svg { fill: var(--wrong); }
@keyframes pulse { 50% { opacity: 0.4; } }

/* School books print characters in the Kai style (楷体), the handwriting children copy: AR PL
   UKai (fonts.js), else the device's own Kai font until it arrives. */
:root { --han: "AR PL UKai CN", "Kaiti SC", "STKaiti", "KaiTi", "楷体", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", serif; }
/* The font has a single weight: never thickened by the browser (brush strokes would smear). */
.prompt-char, .choices button, .tile-char, .rec-name { font-synthesis: none; }

.prompt { flex: 1; min-height: 0; width: 100%; display: grid; place-items: center; }
.prompt-char {
  font-family: var(--han);
  font-size: min(42dvh, 62vw, 340px);
  line-height: 1;
  font-weight: 500;
}
/* A word around the character (words.js): sized to fit its length; the other characters
   lighter, so the one to read stands out. */
.prompt-word { font-size: min(36dvh, calc(88vw / var(--len)), 220px); white-space: nowrap; }
.prompt-word span:not(.target) { opacity: 0.4; }
/* Listen mode: tap to hear the character again. */
.hear-btn {
  width: min(40dvh, 52vw, 220px);
  aspect-ratio: 1;
  border: none;
  border-radius: 50%;
  background: color-mix(in srgb, var(--primary) 14%, var(--surface));
  font-size: min(18dvh, 24vw, 100px);
}
.hear-btn:active { transform: scale(0.95); }
.prompt.speaking .hear-btn { animation: breathe 0.8s ease-in-out infinite; }
.feedback { font-family: system-ui, sans-serif; }

/* Writing: 🔊 and the word (its character to write left blank) on top, the pinyin and the
   picture, then the 田字格, as big as the card allows (sized by app.js). */
#screen-play.writing .prompt { flex: 0 0 auto; display: flex; justify-content: center; align-items: center; gap: 16px; padding: 0 52px; }
#screen-play.writing .hear-btn { width: min(11dvh, 76px); font-size: min(6dvh, 38px); }
#screen-play.writing .prompt-char { font-size: min(10dvh, 68px); }
#screen-play.writing .feedback { min-height: 0; font-size: clamp(1.4rem, 5vw, 2rem); }
.prompt-word span.blank {
  display: inline-grid;
  place-items: center;
  overflow: hidden;
  width: 0.9em;
  height: 0.9em;
  margin: 0 0.05em;
  border: 2px dashed var(--primary);
  border-radius: 8px;
  vertical-align: -0.08em;
  opacity: 1;
}
.write-area { flex: 1 1 0; min-height: 0; min-width: 0; width: 100%; display: grid; place-items: center; }
.write-pad { width: var(--size, 0); height: var(--size, 0); }
.write-frame { position: relative; width: 100%; height: 100%; background: var(--surface); touch-action: none; user-select: none; -webkit-user-select: none; }
.write-grid, .write-target { position: absolute; inset: 0; }
.write-grid { width: 100%; height: 100%; }
/* The grid's lines keep their width whatever the grid's size. */
.write-grid-frame { fill: none; stroke: var(--primary); stroke-width: 3px; vector-effect: non-scaling-stroke; }
.write-grid-mid { fill: none; stroke: color-mix(in srgb, var(--primary) 45%, transparent); stroke-width: 1.5px; stroke-dasharray: 7 6; vector-effect: non-scaling-stroke; }
.write-pad.miss .write-grid-frame { animation: stroke-miss 0.5s; }
@keyframes stroke-miss { 30% { stroke: var(--wrong); stroke-width: 3; } }
/* Copy: the character small and light in its box, a model, never whole in ink. */
.prompt-word span.blank .model { font-size: 0.7em; line-height: 1; color: var(--muted); }
.card.waiting .write-area { opacity: 0.25; pointer-events: none; }
.card.celebrate .write-area { opacity: 0.15; transition: opacity 0.4s ease; }

/* ---------- answers ---------- */

/* Listen mode: the characters to choose from. */
.choices { display: grid; grid-template-columns: repeat(var(--cols, 4), minmax(0, 1fr)); gap: 10px; }
/* Six or eight choices: two rows of smaller cards. */
.choices.two-rows button { max-height: 15dvh; font-size: clamp(1.8rem, 10vw, 3.6rem); }
/* Nine to twelve: three rows. */
.choices.three-rows button { max-height: 11dvh; font-size: clamp(1.5rem, 8vw, 3rem); }
.choices button {
  aspect-ratio: 1;
  max-height: 24dvh;
  min-width: 0;
  padding: 0;
  border: 3px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  font-family: var(--han);
  font-size: clamp(2.2rem, 13vw, 5rem);
  line-height: 1;
  transition: background 0.15s ease, transform 0.05s ease, opacity 0.2s ease;
}
.choices button:active { transform: translateY(2px); }
.choices button:disabled { opacity: 0.25; }
.choices button.hint { background: var(--correct); border-color: var(--correct); color: #fff; }

/* Read mode: the microphone, or ✓ / ✗ for a grown-up. */
.read-answer { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 16px; }
.mic-status { order: 3; flex-basis: 100%; margin: -6px 0 0; text-align: center; font-size: 0.9rem; color: var(--muted); }
.mic[data-mode="error"] ~ .mic-status { color: var(--wrong); }
.judge { display: flex; gap: 16px; }
.judge button {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: 3px solid currentColor;
  background: var(--surface);
  font-size: 2.6rem;
  font-weight: 800;
}
.judge button:active { transform: scale(0.94); }
.judge-right { color: var(--correct); }
.judge-wrong { color: var(--wrong); }
/* The lock: small, for the grown-ups. */
.judge .judge-lock { width: 44px; height: 44px; font-size: 1.3rem; border-color: transparent; background: transparent; align-self: center; }
.grownup-dialog { text-align: center; }
.keep-list { display: grid; gap: 8px; margin: 12px 0; }
.keep-list label { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.keep-list .animal-pic { width: 44px; height: 44px; }
.grownup-question { font-size: 1.6rem; margin: 8px 0 0; }
.grownup-answer { font-size: 2rem; min-height: 1.4em; margin: 0 0 8px; font-variant-numeric: tabular-nums; }
.grownup-keys { display: grid; grid-template-columns: repeat(3, 64px); gap: 8px; justify-content: center; margin-bottom: 16px; }
.grownup-keys button { height: 52px; font-size: 1.4rem; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.grownup-keys button.primary { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }
.grownup-dialog.wrong { animation: shake 0.4s; }

/* Landscape, the microphone at the right: the grown-up's buttons at the left of the strip,
   ✓ and ✗ furthest from it, so a child's quick tap near the microphone can't answer for them. */
@media (orientation: landscape) {
  .watch-strip { flex-direction: row-reverse; padding: 6px 12px 6px 6px; }
  .watch-question { text-align: right; }
}

/* Landscape: reading out loud, the microphone (and ✓ / ✗ when shown) at the right of the
   card, under the thumb. */
@media (orientation: landscape) {
  #screen-play.active:has(#read-answer:not([hidden])) { grid-template-columns: 1fr auto; grid-template-rows: auto 1fr; }
  #screen-play.active:has(#read-answer:not([hidden])) > .topbar { grid-column: 1 / -1; }
  #read-answer { grid-area: 2 / 2; flex-direction: column; flex-wrap: nowrap; }
  #read-answer .judge { flex-direction: column; align-items: center; }
  #read-answer .mic-status { max-width: 9em; }
  /* Listen and find: 🔊 on the card at the left, the choices at the right (two columns, or
     two rows for six or eight), as big as fit. */
  #screen-play.active:has(#choices:not([hidden])) { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); grid-template-rows: auto 1fr; }
  #screen-play.active:has(#choices:not([hidden])) > .topbar { grid-column: 1 / -1; }
  #choices { grid-area: 2 / 2; align-content: center; }
  #choices:not(.two-rows) { --cols: 2 !important; }
  #choices button, #choices.two-rows button { aspect-ratio: auto; height: 36dvh; max-height: none; }
  #choices.three-rows button { height: 23dvh; }
  /* The word answered, sized to the half-width card. */
  #screen-play:has(#choices:not([hidden])) .prompt-word { font-size: min(36dvh, calc(42vw / var(--len)), 220px); }
}

/* Short landscape screens (phones on their side): the character and its pinyin side by
   side, the choices in one row underneath. */
@media (orientation: landscape) and (max-height: 560px) {
  #screen-play.active { gap: 8px; }
  .card { flex-direction: row; gap: 12px; }
  .card .feedback { flex: 1; }
  .prompt-char { font-size: min(52dvh, 300px); }
  .prompt-word { font-size: min(44dvh, calc(52vw / var(--len)), 220px); }
  #screen-play:has(#choices:not([hidden])) .prompt-word { font-size: min(44dvh, calc(26vw / var(--len)), 220px); }
  .hear-btn { width: min(45dvh, 200px); font-size: min(22dvh, 90px); }
  .choices button { font-size: min(15dvh, 4rem); }
  /* Writing: 🔊 above the word, the pinyin, then the grid taking the rest of the card. */
  #screen-play.writing .prompt { flex-direction: column; width: auto; padding: 0; gap: 8px; }
  #screen-play.writing .card .feedback { flex: 0 0 auto; }
  .mic, .judge button { width: 60px; height: 60px; }
  .mic svg { width: 30px; height: 30px; }
  .mic-animal { font-size: 2.2rem; }
  .judge button { font-size: 1.8rem; }
  #read-answer, #read-answer .judge { gap: 8px; }
}

/* Tablets: bigger controls for small fingers on a big screen. */
@media (min-width: 700px) and (min-height: 700px) {
  #screen-play.active { gap: 18px; }
  .player-btn { width: 56px; height: 56px; font-size: 2rem; }
  .map-btn { width: 52px; height: 56px; font-size: 2.2rem; }
  .parents-btn { width: 52px; height: 52px; }
  .stars { font-size: 2.2rem; }
  .mic, .judge button { width: 112px; height: 112px; }
  .mic svg { width: 56px; height: 56px; }
  .mic-animal { font-size: 4rem; }
  .judge button { font-size: 3.4rem; }
  .choices { gap: 16px; max-width: 900px; width: 100%; margin: 0 auto; }
  .feedback { font-size: 3.6rem; min-height: 4.4rem; }
}

/* ---------- settings (parents) ---------- */

.settings-top { display: grid; grid-template-columns: 48px 1fr 48px; align-items: center; }
.settings-top h2 { margin: 0; text-align: center; }
.icon-btn { border: none; background: transparent; font-size: 1.5rem; width: 48px; height: 48px; border-radius: 50%; }
.icon-btn:active { background: var(--border); }
/* A new version, ready, on "Who's playing?" (update.js): its Restart button. */
.update-banner { display: flex; align-items: center; gap: 10px; margin: 0 0 12px; padding: 8px 8px 8px 14px; border: 2px solid var(--primary); border-radius: 14px; background: color-mix(in srgb, var(--primary) 9%, var(--surface)); font-weight: 600; }
.update-banner[hidden] { display: none; }
.update-banner span { flex: 1; }
.update-banner button { min-height: 40px; padding: 0 14px; border: 0; border-radius: 10px; background: var(--primary); color: var(--primary-text); font-weight: 700; }
/* ⚙️ on "Who's playing?": the same gear as in the game's top bar (.parents-btn). */
.gear-btn { padding: 10px; opacity: 0.6; }
.gear-btn svg { width: 100%; height: 100%; fill: var(--muted); display: block; }

.settings { display: flex; flex-direction: column; gap: 14px; user-select: text; -webkit-user-select: text; }
.settings fieldset { border: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.settings legend { font-weight: 700; margin-bottom: 8px; padding: 0; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-weight: 600;
  cursor: pointer;
}
.chip:has(input:checked) { border-color: var(--primary); background: color-mix(in srgb, var(--primary) 15%, var(--surface)); }
.chip:has(input:disabled) { opacity: 0.5; }
.select {
  font: inherit;
  font-weight: 600;
  color: var(--text);
  min-width: 200px;
  padding: 10px 40px 10px 14px;
  border: 2px solid var(--primary);
  border-radius: 14px;
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23c8364b' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E") no-repeat right 10px center / 24px;
  appearance: none;
  -webkit-appearance: none;
}
.chip input { accent-color: var(--primary); width: 18px; height: 18px; margin: 0; }
.select { max-width: 100%; }
/* A choice with an explanation under its name (difficulty), one per line. */
.choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  cursor: pointer;
}
.choice:has(input:checked) { border-color: var(--primary); background: color-mix(in srgb, var(--primary) 15%, var(--surface)); }
.choice input { accent-color: var(--primary); width: 18px; height: 18px; margin: 3px 0 0; flex: none; }
.choice .small { display: block; margin: 2px 0 0; }
.help { line-height: 1.45; }
.muted { color: var(--muted); }

/* ---------- recordings (parents) ---------- */

.settings fieldset.recordings-field { display: block; }
.backup-settings { margin-top: 24px; }
.backup-settings fieldset { display: block; }
.backup-settings .player-actions { margin-bottom: 8px; }
#backup-status:empty, #account-status:empty { display: none; }
.account-devices { list-style: none; padding: 0; margin: 0 0 12px; display: grid; gap: 8px; }
.account-devices li { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.sign-in-buttons { display: contents; }
.cloud { margin-bottom: 12px; }
.cloud-label { font-weight: 700; margin: 16px 0 8px; }
.cloud-code-shown { font-size: 1.4em; font-weight: 700; padding: 10px 14px; border: 2px dashed var(--primary); border-radius: 14px; display: inline-block; user-select: all; -webkit-user-select: all; }
.cloud-join { display: grid; gap: 8px; margin-bottom: 12px; }
.cloud-code { font: inherit; color: var(--text); background: var(--surface); padding: 10px 14px; border: 2px solid var(--primary); border-radius: 14px; max-width: 22em; }

/* Saving online, in the family settings: a card with where it stands, the rest folded. */
.online { gap: 12px; }
.online-title { margin: 0; }
.online-card { display: flex; flex-direction: column; gap: 10px; padding: 14px; border: 2px solid var(--border); border-radius: 18px; background: var(--surface); }
.online-status { display: flex; align-items: center; gap: 12px; }
.online-icon { flex: none; width: 40px; height: 40px; padding: 9px; box-sizing: border-box; border-radius: 50%; background: var(--bg); fill: none; stroke: var(--muted); stroke-width: 2; stroke-linejoin: round; }
.online.on .online-icon { stroke: var(--correct); background: color-mix(in srgb, var(--correct) 14%, var(--surface)); }
.online-text { flex: 1; min-width: 0; }
.online-state { margin: 0; font-weight: 700; }
.online-text .small { margin: 2px 0 0; overflow-wrap: anywhere; }
.online-card > .player-actions:empty, #online-note:empty { display: none; }
.cloud-row { display: flex; gap: 8px; }
.online-card .cloud-join { grid-template-columns: minmax(0, 1fr); margin: 0; }
/* The backup and privacy folds follow on from saving online's, under one line. */
#account:not([hidden]) + .folds { border-top: none; }
.cloud-row .cloud-code { flex: 1; min-width: 0; max-width: none; }
/* Folds (sharing, the family code, the account, the backup, privacy): one line each, closed. */
.folds { gap: 0; border-top: 2px solid var(--border); }
.fold { border-bottom: 2px solid var(--border); }
.fold > summary { display: flex; align-items: center; gap: 10px; min-height: 52px; font-weight: 700; cursor: pointer; }
.fold > summary::before { content: '▸'; color: var(--muted); }
.fold[open] > summary::before { content: '▾'; }
.fold > summary::-webkit-details-marker { display: none; }
.fold > summary { list-style: none; }
.fold-summary { margin-left: auto; font-weight: 400; color: var(--muted); font-size: 0.9rem; text-align: right; }
.fold[open] { padding-bottom: 14px; }
.fold[open] > * + * { margin-top: 8px; }
.fold .account-devices { margin: 0; }
.fold .cloud-label { margin: 6px 0 0; }
.fold .cloud-code-shown { margin-bottom: 0; }
.fold-end { margin-top: 8px; }
.small { font-size: 0.9rem; margin: 0 0 4px; }
.rec-status { min-height: 1.3em; margin: 6px 0 0; font-weight: 600; color: var(--primary); }
.rec-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; }
.rec-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 6px 6px 14px;
  border: 2px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}
.rec-row.has { border-color: var(--correct); }
.rec-row.recording { border-color: var(--wrong); }
.rec-name { flex: 1; font-family: var(--han); font-size: 1.8rem; min-width: 0; display: flex; align-items: baseline; gap: 10px; }
.rec-pinyin { font-family: system-ui, sans-serif; font-size: 1rem; font-weight: 600; color: var(--muted); }
.rec-action {
  height: 48px;
  flex: none;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  font-size: 1rem;
  font-weight: 700;
  padding: 0 12px;
}
.rec-action:disabled { opacity: 0.3; }
.rec-action:not(:disabled):active { transform: scale(0.96); }
.rec-btn, .play-btn { width: 52px; padding: 0; font-size: 1.4rem; }
.rec-btn { color: var(--wrong); }
.play-btn { color: var(--correct); }
.del-btn { width: 48px; padding: 0; margin-left: 6px; }
.check-name { flex-wrap: wrap; row-gap: 0; }
.check-heard { flex-basis: 100%; font-family: system-ui, sans-serif; font-weight: 600; font-size: 0.85rem; color: var(--muted); }
.yes-btn, .no-btn { width: 52px; padding: 0; font-size: 1.4rem; }
.yes-btn { color: var(--correct); }
.no-btn { color: var(--wrong); }
.tab-badge {
  display: inline-block;
  min-width: 1.4em;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--wrong);
  color: #fff;
  font-size: 0.8rem;
  line-height: 1.4em;
}
.tab-badge[hidden] { display: none; }
.rec-row.recording .rec-btn { background: var(--wrong); border-color: var(--wrong); color: #fff; animation: pulse 1s infinite; }

/* ---------- players ---------- */

.player-btn {
  flex: none;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 0 0 2px var(--border);
  font-size: 1.6rem;
  line-height: 1;
  padding: 0;
}

.picker.active { display: flex; flex-direction: column; gap: 16px; min-height: calc(100dvh - 28px); }
.picker-top { height: 48px; display: flex; justify-content: space-between; align-items: center; }
/* The den's way to the journey: big, for small fingers. */
.den-journey { width: 56px; height: 56px; font-size: 2rem; line-height: 1; border: 3px solid var(--border); border-radius: 18px; background: var(--surface); cursor: pointer; box-shadow: 0 3px 0 var(--border); }
.den-journey:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--border); }
.picker-actions { margin-left: auto; display: flex; align-items: center; gap: 2px; }
/* The language menus ("Who's playing?", the grown-up question): each language named in itself. */
.lang-menu { font: inherit; font-size: 0.95rem; color: var(--text); background: var(--surface); border: 2px solid var(--border); border-radius: 12px; padding: 6px 8px; max-width: 9.5em; }
.grownup-exit { width: 64px; height: 64px; margin: 0 auto 14px; }
.grownup-exit svg { width: 32px; height: 32px; }
.animal-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 16px;
  align-content: center;
  justify-items: center;
}
.animal-tile {
  width: 110px;
  height: 110px;
  border-radius: 28px;
  border: 4px solid var(--border);
  background: var(--surface);
  font-size: 4rem;
  line-height: 1;
  transition: transform 0.08s ease;
}
.animal-tile:active { transform: scale(0.94); }
.animal-tile.selected { border-color: var(--primary); }
.animal-tile.add { color: var(--primary); font-weight: 700; border-style: dashed; }
/* First launch: a single big ＋ in the middle. */
.animal-grid:has(> .animal-tile:only-child) { grid-template-columns: 1fr; }
.animal-tile.add:only-child { width: 160px; height: 160px; font-size: 5rem; }

/* A player's settings: the animal (a tap changes player) and the name beside it. */
.player-field { display: flex; align-items: center; gap: 16px; padding: 12px; border: 2px solid var(--border); border-radius: 20px; background: var(--surface); }
/* Saving online at a glance, above the player: a tap opens the family settings. */
.sync-status { display: flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 14px; border: 2px solid var(--border); border-radius: 22px; background: var(--surface); color: var(--muted); font-weight: 700; text-align: left; }
.sync-status svg { flex: none; width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linejoin: round; }
.sync-status #sync-status-text { flex: 1; min-width: 0; }
.sync-status.on { color: var(--correct); border-color: color-mix(in srgb, var(--correct) 40%, var(--border)); }
.sync-status[hidden] { display: none; }
/* Deleting a player: at the end of the Settings tab, set apart. */
.danger-zone { margin-top: 28px; padding: 16px; gap: 8px; border: 2px solid color-mix(in srgb, var(--wrong) 35%, var(--border)); border-radius: 18px; }
.danger-zone h3 { margin: 0; color: var(--wrong); }
.danger-zone .btn-small { align-self: flex-start; }
/* The backup, folded under saving online. */
.backup-fold > summary { font-weight: 700; cursor: pointer; padding: 6px 0; }
.settings-animal {
  flex: none;
  width: 88px;
  height: 88px;
  border-radius: 24px;
  border: 3px solid var(--primary);
  background: var(--surface);
  font-size: 3.2rem;
  line-height: 1;
}
.player-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.btn-small {
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  padding: 8px 12px;
  font-weight: 600;
}
.btn-small.danger { color: var(--wrong); }
.btn-small.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.level-dialog {
  max-width: min(440px, calc(100vw - 32px));
  border: none;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 20px;
}
.level-dialog::backdrop { background: rgb(0 0 0 / 0.4); }
.level-dialog h3 { margin: 0 0 8px; }
.level-dialog .select { width: 100%; margin: 8px 0 16px; }
/* A new player (setUpPlayer): what they learn as big choices, then where to start. */
.setup-choices { display: flex; flex-direction: column; gap: 8px; margin: 12px 0 4px; }
.setup-choices button { padding: 14px 16px; border: 2px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--text); font: inherit; font-weight: 700; text-align: left; }
.setup-choices button[aria-pressed="true"] { border-color: var(--primary); background: color-mix(in srgb, var(--primary) 10%, var(--surface)); color: var(--primary); }
.setup-start { margin: 16px 0 0; font-size: 1rem; }
.setup-name { display: flex; flex-direction: column; gap: 6px; margin: 14px 0 0; font-weight: 700; }
.setup-name input { font: inherit; font-weight: 400; padding: 10px 12px; border: 2px solid var(--border); border-radius: 12px; background: var(--surface); color: var(--text); }
.setup-name + .setup-start { margin-top: 14px; }
/* The child's turn: "Léo, choose your animal!", big, above the animals. */
.animals-title { margin: 12px 0 0; text-align: center; font-size: 1.5rem; color: var(--primary); text-wrap: balance; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }

/* ---------- "How to use" (tutorial.js, guides.js) ---------- */

/* The big button under the players, for the grown-ups. */
.guides-btn {
  align-self: center;
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 8px; padding: 14px 22px;
  border: 2px solid var(--primary); border-radius: var(--radius);
  background: var(--surface); color: var(--primary);
  font: inherit; font-size: 1.05rem; font-weight: 700;
}
.guides-btn span { font-size: 1.4rem; line-height: 1; }
.tutorial-dialog { width: min(440px, calc(100vw - 32px)); max-height: calc(100dvh - 24px); touch-action: pan-y; }
.tut-head { display: flex; align-items: center; gap: 8px; margin: -6px -8px 4px 0; }
.tut-heading { flex: 1; margin: 0 !important; }
.tut-close { margin-left: auto; font-size: 1.1rem; }
.tut-list { display: flex; flex-direction: column; gap: 8px; }
.tut-item {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px; text-align: left;
  border: 2px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--text);
  font: inherit; font-weight: 600;
}
.tut-item-icon { width: 1.6em; font-size: 1.3rem; text-align: center; line-height: 1; }
.tut-item-title { flex: 1; }
.tut-item-go { color: var(--primary); font-size: 0.85rem; }
.tut-guide[hidden], .tut-list[hidden], .tut-video[hidden] { display: none; }
/* The video: the app on a phone, as tall as fits with the words under it. */
.tut-video {
  display: block; margin: 0 auto; height: min(46dvh, 400px); aspect-ratio: 9 / 16; max-width: 100%;
  object-fit: contain; background: var(--bg); border: 3px solid var(--border); border-radius: 18px;
}
.tutorial-dialog .tut-title { margin: 12px 0 6px; }
.tutorial-dialog .tut-text { min-height: 4.4em; margin: 0; line-height: 1.45; }
.tut-dots { display: flex; justify-content: center; gap: 6px; margin: 10px 0; }
.tut-dots span { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.tut-dots span.on { background: var(--primary); }
.tut-actions { align-items: center; }
.tut-gap { flex: 1; }

/* Settings tabs */

.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border); }
.tabs button {
  flex: 1;
  min-height: 48px;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  background: transparent;
  font-weight: 700;
  color: var(--muted);
}
.tabs button[aria-selected="true"] { color: var(--primary); border-bottom-color: var(--primary); }

/* Progress tab */

.progress-view { display: flex; flex-direction: column; gap: 16px; user-select: text; -webkit-user-select: text; }
/* A lesson: its name and counts, then its tiles; the one being learned is tinted. */
.progress-level { display: flex; flex-direction: column; gap: 8px; padding: 8px; border-radius: 12px; }
.progress-level.current { background: color-mix(in srgb, var(--primary) 9%, var(--surface)); }
.lesson-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lesson-head .place-name { flex: 1; min-width: 0; }
.lesson-tiles { display: flex; flex-wrap: wrap; gap: 8px; }
.now-tag { color: var(--primary); }
/* ✓ known and 🎙 recorded, side by side; under the name when it doesn't leave them room. */
.count-badges { display: inline-flex; gap: 6px; margin-left: auto; flex: none; }
.count-badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 8px; border-radius: 10px; font-size: 0.78rem; font-weight: 700; white-space: nowrap; font-family: system-ui, sans-serif; }
.known-badge { color: var(--prog-known); background: color-mix(in srgb, var(--prog-known) 14%, var(--surface)); }
.rec-badge { color: var(--muted); background: color-mix(in srgb, var(--primary) 10%, var(--surface)); }
.lesson-head .count-badge { padding: 0 2px; background: none; }
.mic-icon { display: inline-flex; width: 11px; height: 11px; }
.mic-icon svg { width: 100%; height: 100%; }
/* The mark on a recorded tile (and in the legend): the microphone in a dot. */
.rec-mark { display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 50%; background: var(--primary); color: var(--primary-text); flex: none; }
.rec-mark .mic-icon { width: 10px; height: 10px; }
.char-tile .rec-mark { position: absolute; top: 3px; right: 3px; box-shadow: 0 0 0 1.5px var(--surface); }
.progress-level.ahead { opacity: 0.55; }
.progress-fold { border-top: 1px solid var(--border); padding: 6px 0; }
.progress-fold > summary { font-weight: 700; cursor: pointer; padding: 6px 0; }
.level-summary { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; list-style: none; }
.level-summary::-webkit-details-marker { display: none; }
.level-summary::before { content: '▸'; color: var(--muted); }
.progress-fold[open] > .level-summary::before { content: '▾'; }
.level-names { display: flex; flex-direction: column; min-width: 0; flex: 1 1 7em; }
.level-zh { font-family: var(--han); font-weight: 600; color: var(--muted); font-size: 0.95rem; }
.debug-fold { border-top: 1px solid var(--border); border-bottom: none; }
.progress-fold[open] { display: flex; flex-direction: column; gap: 6px; }
.level-icon { width: 36px; font-size: 1.5rem; text-align: center; }
.place-name { flex-basis: calc(100% - 42px); font-weight: 600; color: var(--muted); }
.level-dialog .select + .select { margin-top: -8px; }
.icon-actions { justify-content: space-between; }
.icon-action {
  width: 56px;
  height: 56px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  font-size: 1.6rem;
  line-height: 1;
}
.icon-action.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); font-weight: 800; }
.practice-list { max-height: 55dvh; overflow-y: auto; margin: 8px 0 16px; }
.practice-level > summary input { width: 18px; height: 18px; accent-color: var(--primary); vertical-align: -3px; }
.practice-lesson { display: flex; align-items: baseline; gap: 6px; padding: 6px 0 6px 24px; }
.practice-lesson input { width: 18px; height: 18px; accent-color: var(--primary); flex: none; align-self: center; }
.practice-chars { font-family: var(--han); color: var(--muted); overflow-wrap: anywhere; }
.char-tile {
  position: relative;
  width: 58px;
  height: 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 0 6px;
  border: 2px solid transparent;
  border-radius: 10px;
  overflow: hidden;
  color: #fff;
}
.char-tile.known { background: var(--prog-known); }
.char-tile.learning { background: var(--prog-learning); color: #1d1300; }
.char-tile.hard {
  background: repeating-linear-gradient(135deg, var(--prog-hard) 0 6px,
    color-mix(in srgb, var(--prog-hard) 75%, #000) 6px 9px);
}
.char-tile.unseen { background: var(--surface); border: 2px dashed var(--muted); color: var(--text); }
.char-tile:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.tile-char { font-family: var(--han); font-size: 1.7rem; line-height: 1.1; }
.tile-pinyin { font-size: 0.72rem; font-weight: 600; }
.tile-meter { position: absolute; left: 0; bottom: 0; height: 4px; background: currentColor; opacity: 0.8; }
.pace-line { margin: 0; }
.progress-details { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.table-scroll { overflow-x: auto; max-width: 100%; }
.details-table { border-collapse: collapse; font-size: 0.85rem; }
.details-table th, .details-table td { padding: 4px 8px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
.details-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.params {
  margin: 0;
  max-width: 100%;
  overflow-x: auto;
  font-size: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
}

/* ---------- the journey (journey.js): the animal's walk, in 3D ---------- */

.map {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  border: 4px solid var(--border);
  border-radius: 28px;
  background: color-mix(in srgb, var(--correct) 10%, var(--surface));
}
.map-exit {
  flex: none;
  width: 84px;
  height: 84px;
  margin: 0 auto;
  display: grid;
  place-items: center;
  border: 3px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
}
.map-exit svg { width: 40px; height: 40px; fill: var(--text); }
.map-exit:active { transform: scale(0.94); }
.map-actions { display: flex; align-items: center; justify-content: center; gap: 24px; }
.map-actions .map-exit { margin: 0; }
.map-side { width: 64px; }
.map-actions .map-side.map-exit { height: 64px; font-size: 1.8rem; }

/* Settings: one line per setting, more behind ⓘ */
.info-btn { border: none; background: transparent; padding: 0 4px; font-size: 1.1rem; color: var(--primary); }

/* A player's Settings tab: sections, each a heading and its controls. */
#settings-form { gap: 24px; }
.set-section { display: flex; flex-direction: column; gap: 10px; }
.set-section h3 { margin: 0; font-size: 1.05rem; display: flex; align-items: center; gap: 2px; }
.set-section > .small { margin: -6px 0 0; }
.set-section .select { width: 100%; }
.level-line { justify-content: space-between; padding: 8px 8px 8px 14px; border: 2px solid var(--border); border-radius: 14px; background: var(--surface); }
.set-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
/* What to practice: the label, the two choices across, then what the choice means. */
.practice-choice { display: flex; flex-direction: column; gap: 8px; }
.practice-summary { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 0; color: var(--muted); font-size: 0.92rem; }
.practice-actions { flex-wrap: wrap; }
.practice-actions #btn-practice-clear { margin-right: auto; }
.set-row.set-column { flex-direction: column; align-items: stretch; }
.set-label { flex: 1; font-weight: 600; }
/* Segmented buttons, from radio inputs: one choice of a few, on one line. */
.seg { display: inline-flex; border: 2px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--surface); }
.seg label { position: relative; display: flex; }
.seg label + label { border-left: 2px solid var(--border); }
.seg input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.seg span { min-width: 44px; min-height: 38px; padding: 0 12px; display: grid; place-items: center; font-weight: 700; cursor: pointer; }
.seg input:checked + span { background: var(--primary); color: var(--primary-text); }
.seg input:focus-visible + span { outline: 3px solid var(--primary); outline-offset: -3px; }
.seg-wide { display: flex; }
.seg-wide label { flex: 1; }
.seg-wide span { flex: 1; }
/* Sliders: the value beside the name, and what each end means under. */
.slider { display: flex; flex-direction: column; gap: 6px; }
.slider-top { display: flex; align-items: center; gap: 2px; font-weight: 600; }
.slider-top output { margin-left: auto; font-weight: 700; color: var(--primary); }
.slider input[type=range] { width: 100%; margin: 0; accent-color: var(--primary); height: 28px; }
.slider-ends { display: flex; justify-content: space-between; gap: 12px; font-size: 0.8rem; color: var(--muted); }
.slider-ends span:last-child { text-align: right; }
/* Rewards: one line per way of answering, ×1 ×2 ×3. */
.reward-list { border: 2px solid var(--border); border-radius: 14px; background: var(--surface); }
.reward-row { display: flex; align-items: center; gap: 10px; padding: 6px 8px 6px 14px; }
.reward-row + .reward-row { border-top: 1px solid var(--border); }
.reward-row[hidden] { display: none; }
.reward-label { flex: 1; font-weight: 600; }
.reward-row .seg span { min-height: 34px; }
/* Activities: each way to play, its coins, and its own settings under it. */
.activity + .activity { border-top: 1px solid var(--border); }
.coins-label { font-size: 0.8rem; color: var(--muted); }
.activity-setting { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 2px 8px 8px 28px; font-size: 0.95rem; }
.activity-setting.activity-column { flex-direction: column; align-items: stretch; }
.activity-setting.switch-row { min-height: 0; }
#voice-advanced[hidden] { display: none; }
/* Each activity, folded: its name and what it is set to, then its settings when unfolded. */
.reward-list .fold.activity { border-bottom: none; }
.reward-list .fold.activity > summary { padding: 0 12px; min-height: 50px; }
.reward-list .fold.activity[open] { padding-bottom: 8px; }
.reward-list .fold.activity[open] > summary { color: var(--primary); }
.activity-summary { font-size: 0.85rem; }
/* Two or three short choices beside their name, on one line. */
.seg-compact span { min-width: 0; padding: 0 9px; min-height: 34px; font-size: 0.9rem; }
/* A slider inside an activity: its name, the slider, its value. */
.activity-range { flex: 1; min-width: 120px; margin: 0; accent-color: var(--primary); height: 28px; }
.activity-value { min-width: 1.6em; text-align: right; font-weight: 700; color: var(--primary); }
/* On/off options, as switches. */
.switch-row { display: flex; align-items: center; gap: 10px; min-height: 44px; font-weight: 600; }
.switch-row > span { flex: 1; }
.switch-row input { width: 22px; height: 22px; margin: 0; accent-color: var(--primary); }
.set-fold[open] > .set-row { margin-top: 4px; }
.set-fold { border-top: 2px solid var(--border); }
.level-line { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; width: 100%; margin: 4px 0 0; }
.level-line .path-progress { width: auto; margin: 0; }
.sub-setting { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; width: 100%; margin-top: 6px; }
.sub-label { width: 100%; font-weight: 600; }
.help-fold > summary { font-weight: 700; cursor: pointer; }
/* The microphone's finer settings, folded; all of them hidden while voice is off. */
.advanced-fold { width: 100%; margin-top: 10px; }
.advanced-fold > summary { font-weight: 600; cursor: pointer; color: var(--primary); }
.voice-field:not(:has([name=voice]:checked)) :is(.sub-setting, .advanced-fold) { display: none; }
#info-text p { margin: 0 0 8px; }

/* Progress tab: skill picker and path line */

/* The skill shown: joined buttons (.seg) on one line. */
.skill-picker span { padding: 0 6px; white-space: nowrap; }
/* The current level, drawn: name and places reached, the path bar, then its characters'
   known / learning / hard as a thin stacked bar with their numbers. */
.level-card { display: flex; flex-direction: column; gap: 8px; padding: 12px 14px; border: 2px solid var(--border); border-radius: 16px; background: var(--surface); }
.level-card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.level-card .level-name { font-weight: 800; color: var(--primary); }
.level-count { font-weight: 700; color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.path-bar { position: relative; height: 12px; border-radius: 6px; overflow: hidden; background: color-mix(in srgb, var(--primary) 14%, transparent); }
.path-bar b { position: absolute; inset: 0 auto 0 0; border-radius: 6px; background: var(--primary); }
.path-bar i { position: absolute; top: 0; bottom: 0; background: color-mix(in srgb, var(--primary) 40%, transparent); }
.mix { display: flex; flex-direction: column; gap: 6px; }
.mix-bar { display: flex; height: 8px; border-radius: 4px; overflow: hidden; background: color-mix(in srgb, var(--muted) 18%, transparent); }
.mix-bar .known, .mix-numbers .known::before { background: var(--prog-known); }
.mix-bar .learning, .mix-numbers .learning::before { background: var(--prog-learning); }
.mix-numbers .hard::before { background: var(--prog-hard); }
.mix-bar .hard { background: repeating-linear-gradient(135deg, var(--prog-hard) 0 4px, color-mix(in srgb, var(--prog-hard) 60%, var(--surface)) 4px 6px); }
.mix-numbers { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 0.85rem; font-weight: 600; color: var(--muted); font-variant-numeric: tabular-nums; }
.mix-numbers span::before { content: ""; display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 5px; }
.path-line { margin: 0; font-weight: 600; }

.path-progress { margin: 4px 0 0; width: 100%; font-weight: 600; color: var(--primary); }

/* The app's version, at the bottom of the settings, for the grown-ups. */
.app-version { text-align: center; margin-top: 24px; }

/* "Who's playing?": the player's animal, with their name under it for the grown-ups. */
.player-pic { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.player-pic .animal-pic { width: 1.05em; }
.player-name { font-size: 0.85rem; font-weight: 700; line-height: 1.1; max-width: 96px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player-name:empty { display: none; }
.player-name-field { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; font-weight: 600; }
.player-name-field input { flex: 1; min-width: 0; font: inherit; padding: 8px 12px; border: 2px solid var(--border); border-radius: 12px; background: var(--surface); color: var(--text); }

/* The den (den.js): the child's animal on a round rug, then a row of animals and one per kind
   of prop, each swiping sideways (its far end fades, to show there's more). Theirs come first,
   in color; the others are greyed, with a padlock that wiggles when tapped. While the jar is
   full, the next one of each row has a glowing gold border instead of the padlock.
   The den is one screen tall: the animal stays in sight while the shelves scroll under it
   (beside it, on a screen held sideways), so the child sees each thing put on. */
.den.active {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 14px;
  height: calc(100dvh - max(12px, env(safe-area-inset-top)) - max(16px, env(safe-area-inset-bottom)));
}
.den-stage {
  align-self: center;
  justify-self: center;
  width: min(250px, 58vw, 30dvh);
  padding: 24px 12px 6px;
  border-radius: 50% 50% 28px 28px / 40% 40% 28px 28px;
  background: radial-gradient(ellipse at 50% 85%, var(--correct-bg) 0 45%, transparent 70%);
  cursor: pointer;
}
.den-stage:focus-visible { outline: 3px solid var(--primary); outline-offset: 4px; }
.den-shelves {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  padding-bottom: 24px;
  -webkit-mask-image: linear-gradient(to bottom, #000 calc(100% - 28px), transparent); /* more below */
  mask-image: linear-gradient(to bottom, #000 calc(100% - 28px), transparent);
}
.den-shelves::-webkit-scrollbar { display: none; }
/* Held sideways: the animal on the left, the shelves on the right. */
@media (orientation: landscape) {
  .den.active { grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); grid-template-rows: auto minmax(0, 1fr); column-gap: 20px; }
  .den .picker-top { grid-column: 1 / -1; }
  .den-stage { width: min(320px, 36vw, 62dvh); }
}
.den-shelf { display: flex; align-items: center; gap: 8px; }
.den-shelf-icon { font-size: 1.6rem; width: 32px; text-align: center; flex: none; }
.den-tiles {
  flex: 1;
  min-width: 0;
  display: flex;
  gap: 10px;
  padding: 8px 8px 10px; /* room for the gold glow */
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  position: relative; /* the tiles' offsetLeft, to bring one into view */
  -webkit-mask-image: linear-gradient(to right, #000 82%, transparent);
  mask-image: linear-gradient(to right, #000 82%, transparent);
}
.den-tiles::-webkit-scrollbar { display: none; }
.den-tile {
  position: relative;
  flex: none;
  width: 84px;
  height: 84px;
  scroll-snap-align: start;
  padding: 6px;
  border-radius: 20px;
  border: 3px solid var(--border);
  background: var(--surface);
  transition: transform 0.08s ease;
}
.den-tile:active { transform: scale(0.94); }
.den-tile.selected { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary) inset; }
.den-pic { display: block; width: 100%; height: 100%; overflow: hidden; border-radius: 14px; }
.den-pic svg { display: block; width: 100%; height: 100%; }
.den-tile.locked .den-pic { filter: grayscale(1); opacity: 0.4; }
.den-tile.winnable .den-pic { filter: grayscale(1); opacity: 0.55; }
.den-tile.winnable { border: 3px dashed var(--star); animation: den-glow 1.6s ease-in-out infinite; }
@keyframes den-glow { 50% { box-shadow: 0 0 0 4px rgba(245, 193, 59, 0.35), 0 0 14px rgba(245, 193, 59, 0.6); } }
.den-tile.won { animation: den-won 0.6s cubic-bezier(.3, 1.6, .6, 1); }
@keyframes den-won { from { transform: scale(0.4); } }
.den-lock { position: absolute; right: 4px; bottom: 2px; font-size: 1.15rem; line-height: 1; }
.den-tile.nope { animation: shake 0.35s; }
.den-tile.nope .den-lock { animation: bounce 0.18s ease 2 alternate; }
@media (prefers-reduced-motion: reduce) { .den-tile.nope, .den-tile.nope .den-lock, .den-tile.winnable, .den-tile.won { animation: none; } }

/* ---------- the coin jar (jar.js; the same in Tunilo and Zilu) ---------- */
/* The jar sits in the card's bottom-right corner, out of the way of any way of answering. */
.jar-dock { position: absolute; right: 10px; bottom: 10px; width: 52px; transform-origin: 50% 100%; pointer-events: none; z-index: 1; }
.jar-dock.bump { animation: jar-bump 0.25s ease-out; }
@keyframes jar-bump { 50% { transform: scale(1.08, 0.94); } }
.jar-svg { display: block; width: 100%; height: auto; overflow: visible; }
.falling-coin { position: fixed; z-index: 11; pointer-events: none; line-height: 0; }
.falling-coin svg { display: block; overflow: visible; }

/* The gift: the full jar in the middle, opened with a tap (then the den opens). */
.gift { position: fixed; inset: 0; z-index: 9; background: rgba(31, 27, 58, 0.55); display: grid; place-items: center; animation: gift-in 0.3s; }
@keyframes gift-in { from { background: transparent; } }
.gift-jar { width: min(190px, 50vw); position: relative; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.gift-jar:focus-visible { outline: 3px solid var(--star); outline-offset: 6px; border-radius: 16px; }
.gift.ready .gift-jar { animation: gift-wiggle 1.1s ease-in-out infinite; }
@keyframes gift-wiggle {
  0%, 60%, 100% { transform: rotate(0); }
  70% { transform: rotate(-6deg) scale(1.04); }
  80% { transform: rotate(6deg) scale(1.04); }
  90% { transform: rotate(-3deg); }
}
.gift .jar-lid { transition: transform 0.6s ease-out, opacity 0.6s 0.2s; }
.gift.open .jar-lid { transform: translate(28px, -70px) rotate(35deg); opacity: 0; }
.gift.open .gift-jar { transform: scale(0.8); opacity: 0.35; transition: transform 0.6s, opacity 0.6s; }
@media (prefers-reduced-motion: reduce) {
  .gift, .gift.ready .gift-jar, .jar-dock.bump { animation: none !important; }
}

/* A tile's sheet (sheet.js): slides up from the bottom of the screen. */
.sheet {
  margin: auto auto 0;
  width: min(560px, 100vw);
  max-width: 100vw;
  max-height: 92dvh;
  border: none;
  border-radius: 22px 22px 0 0;
  background: var(--bg);
  color: var(--text);
  padding: 8px 16px calc(16px + env(safe-area-inset-bottom));
  box-shadow: 0 -6px 24px rgb(0 0 0 / 0.18);
  overflow-y: auto;
}
.sheet[open] { display: flex; flex-direction: column; gap: 14px; animation: sheet-up 0.22s ease-out; }
.sheet::backdrop { background: rgb(0 0 0 / 0.35); }
@keyframes sheet-up { from { transform: translateY(40px); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .sheet[open] { animation: none; } }
.sheet-grip { align-self: center; width: 40px; height: 5px; border-radius: 3px; background: var(--border); }
.sheet-head { display: flex; align-items: center; gap: 12px; }
.sheet-heading { flex: 1; min-width: 0; }
.sheet-heading h3 { margin: 0; font-size: 1.15rem; }
.sheet-heading p { margin: 2px 0 0; }
.sheet-close { flex: none; width: 44px; height: 44px; border-radius: 50%; border: 2px solid var(--border); background: var(--surface); color: var(--text); font-size: 1.1rem; }
.sheet-tile { flex: none; cursor: default; }
.sheet-bars { display: flex; flex-direction: column; gap: 10px; }
.sheet-bar-line { display: flex; align-items: baseline; gap: 8px; }
.sheet-bar-name { flex: 1; font-weight: 600; }
.sheet-track { height: 10px; margin-top: 4px; border-radius: 5px; background: color-mix(in srgb, var(--border) 70%, var(--surface)); overflow: hidden; }
.sheet-fill { display: block; height: 100%; border-radius: 5px; }
.sheet-fill.known { background: var(--prog-known); }
.sheet-fill.learning { background: var(--prog-learning); }
.sheet-fill.hard { background: var(--prog-hard); }
.sheet-fill.unseen { background: var(--muted); opacity: 0.35; }
.sheet-recs { display: flex; flex-direction: column; gap: 8px; padding-top: 12px; border-top: 2px solid var(--border); }
.sheet-recs-head { display: flex; align-items: baseline; gap: 8px; }
.sheet-recs-head h4 { flex: 1; margin: 0; font-size: 1rem; }
.sheet-recs .rec-status { margin: 0; }
.sheet-rec { display: flex; align-items: center; gap: 8px; padding: 6px 6px 6px 14px; border: 2px solid var(--border); border-radius: 14px; background: var(--surface); }
.sheet-rec.has { border-color: var(--correct); }
.sheet-rec.recording { border-color: var(--wrong); }
.sheet-rec-text { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.sheet-rec-name { font-family: var(--han); font-size: 1.4rem; font-weight: 700; }
.sheet-rec .rec-action { height: 44px; }
.sheet-rec .del-btn { margin-left: 0; }
.sheet-nav { display: flex; align-items: center; gap: 8px; }
.sheet-nav > span { flex: 1; text-align: center; }
.sheet-nav .btn-small { min-height: 44px; }
.sheet-nav .btn-small:disabled { opacity: 0.4; }

/* The child's voice (voiceview.js), at the bottom of the Voice tab. */
/* A card, as the Progress tab's levels; the open one outlined in the app's color. */
.voice-fold { border: 2px solid var(--border); border-radius: 16px; background: var(--surface); padding: 0 12px; }
.voice-fold[open] { border-color: var(--primary); padding-bottom: 12px; }
.voice-fold > summary::before, .voice-fold[open] > summary::before { content: none; }
.voice-fold[open] > summary .fold-title { color: var(--primary); }
.voice-fold > summary .fold-title { flex: 1; }
.voice-view { display: flex; flex-direction: column; gap: 10px; }
.voice-view > * { margin: 0; }
/* A long list scrolls inside the card, the page around it as before; a shadow at the top or
   bottom shows there is more. */
.voice-rows {
  display: flex;
  flex-direction: column;
  max-height: 55dvh;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(var(--surface) 30%, transparent) top / 100% 28px no-repeat local,
    linear-gradient(transparent, var(--surface) 70%) bottom / 100% 28px no-repeat local,
    radial-gradient(farthest-side at 50% 0, rgb(0 0 0 / 0.14), transparent) top / 100% 10px no-repeat scroll,
    radial-gradient(farthest-side at 50% 100%, rgb(0 0 0 / 0.14), transparent) bottom / 100% 10px no-repeat scroll,
    var(--surface);
}
.voice-row { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-top: 1px solid var(--border); }
.voice-row-text { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.voice-row-name { font-size: 1.1rem; font-weight: 500; }
.voice-row.in-play .voice-row-name { font-weight: 700; }
.voice-row-chars { font-family: var(--han); font-weight: 400; color: var(--muted); }
.voice-row-facts { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.voice-row-facts .small { margin: 0; }
.voice-row .rec-action { height: 42px; width: 46px; }
.voice-row .del-btn { margin-left: 0; }
.example-dots { display: inline-flex; align-items: center; gap: 4px; }
.example-dots .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border); }
.example-dots .dot.on { background: var(--primary); }
.example-dots .small { margin: 0 0 0 2px; }
.helps-tag { font-size: 0.78rem; font-weight: 700; color: var(--correct); background: var(--correct-bg); border-radius: 10px; padding: 2px 8px; white-space: nowrap; }
.check-tag { font-size: 0.78rem; font-weight: 700; color: var(--primary-text); background: var(--primary); border-radius: 9px; padding: 1px 7px; white-space: nowrap; }
.voice-view .btn-small { align-self: flex-start; }
.sheet-rec.recording .rec-btn, .voice-row .rec-btn.recording { background: var(--wrong); border-color: var(--wrong); color: #fff; animation: pulse 1s infinite; }

/* The Progress tab's levels as cards, as in the design: the open one outlined in the app's color. */
.progress-view .progress-fold { border: 2px solid var(--border); border-radius: 16px; background: var(--surface); padding: 0 12px; }
.progress-view .progress-fold[open] { border-color: var(--primary); padding-bottom: 12px; }
.progress-view .progress-fold > .level-summary { min-height: 56px; padding: 8px 0; }
.progress-view .progress-fold > .level-summary::before { content: none; }
.progress-view .progress-fold[open] > .level-summary .level-name { color: var(--primary); }

/* A grade's lessons scroll inside its card, the page around it as before; a shadow at the top
   or bottom shows there is more. */
.level-lessons {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 60dvh;
  overflow-y: auto;
  overscroll-behavior: contain;
  background:
    linear-gradient(var(--surface) 30%, transparent) top / 100% 28px no-repeat local,
    linear-gradient(transparent, var(--surface) 70%) bottom / 100% 28px no-repeat local,
    radial-gradient(farthest-side at 50% 0, rgb(0 0 0 / 0.14), transparent) top / 100% 10px no-repeat scroll,
    radial-gradient(farthest-side at 50% 100%, rgb(0 0 0 / 0.14), transparent) bottom / 100% 10px no-repeat scroll,
    var(--surface);
}