/* Regroup! Bright and chunky, one color per place value (the same color everywhere), with dark mode. */

:root {
  --font-body: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Baloo 2", "Nunito", system-ui, sans-serif;
  --bg: #fffaf0;
  --surface: #ffffff;
  --surface-2: #fff1d9;
  --text: #2b2340;
  --muted: #6d6680;
  --border: #f1e0c6;
  --accent: #ff8a00;
  --accent-strong: #d96a00;
  --accent-ink: #ffffff;
  --sun: #ffc93c;
  --good: #16a34a; --good-soft: #dcfce7;
  --bad: #e5484d;

  /* Place-value colors: ones blue, tens green, hundreds red, thousands purple. */
  --c0: #1d7fe0; --c0-dark: #135ea9; --c0-soft: #e3f0ff; --c0-ink: #0f4f91;
  --c1: #1ea55b; --c1-dark: #137a41; --c1-soft: #dcf6e6; --c1-ink: #0f6a37;
  --c2: #e5484d; --c2-dark: #b02d33; --c2-soft: #ffe3e2; --c2-ink: #a5262c;
  --c3: #8b46d6; --c3-dark: #6429a6; --c3-soft: #f0e5ff; --c3-ink: #5a2399;

  --shadow: 0 4px 0 var(--border);
  --radius: 20px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17142a; --surface: #221e38; --surface-2: #2d2847; --text: #f4f1ff; --muted: #b5aecb; --border: #3a345a;
    --accent: #ff9d2e; --accent-strong: #ffb85c; --accent-ink: #1c1306;
    --c0: #4aa3ff; --c0-dark: #2a7fd6; --c0-soft: #16304f; --c0-ink: #9fcdff;
    --c1: #37c977; --c1-dark: #23a05b; --c1-soft: #143a27; --c1-ink: #8de8b5;
    --c2: #ff6b70; --c2-dark: #d6464c; --c2-soft: #47202a; --c2-ink: #ffb0b3;
    --c3: #b07bff; --c3-dark: #8a53e0; --c3-soft: #33224f; --c3-ink: #d7beff;
    --good-soft: #173826;
    --shadow: 0 4px 0 #0c0a18;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #17142a; --surface: #221e38; --surface-2: #2d2847; --text: #f4f1ff; --muted: #b5aecb; --border: #3a345a;
  --accent: #ff9d2e; --accent-strong: #ffb85c; --accent-ink: #1c1306;
  --c0: #4aa3ff; --c0-dark: #2a7fd6; --c0-soft: #16304f; --c0-ink: #9fcdff;
  --c1: #37c977; --c1-dark: #23a05b; --c1-soft: #143a27; --c1-ink: #8de8b5;
  --c2: #ff6b70; --c2-dark: #d6464c; --c2-soft: #47202a; --c2-ink: #ffb0b3;
  --c3: #b07bff; --c3-dark: #8a53e0; --c3-soft: #33224f; --c3-ink: #d7beff;
  --good-soft: #173826;
  --shadow: 0 4px 0 #0c0a18;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.5 var(--font-body);
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}
a { color: var(--accent-strong); }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; }
h1 { font-size: clamp(2rem, 7vw, 2.8rem); font-weight: 800; margin: 0.3em 0 0.2em; }
h2 { font-size: 1.3rem; font-weight: 800; margin: 1.2em 0 0.4em; }
h2 small { font-family: var(--font-body); font-weight: 400; font-size: 0.8rem; color: var(--muted); margin-left: 6px; }
.muted { color: var(--muted); }
.small { font-size: 0.88rem; }
.center { justify-content: center; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
button { font: inherit; color: inherit; }

/* Text in a place's color */
.c0 { color: var(--c0-ink); } .c1 { color: var(--c1-ink); } .c2 { color: var(--c2-ink); } .c3 { color: var(--c3-ink); }

main { max-width: 820px; margin: 0 auto; padding: 8px 16px 64px; }

/* ── top bar ── */
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 12px;
  padding: 8px max(16px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font: 800 1.35rem var(--font-display); color: var(--text); text-decoration: none; }
.logo { width: 34px; height: 34px; border-radius: 10px; background: url("../icon.svg") center / cover; transform: rotate(-6deg); }
.nav { margin-left: auto; display: flex; gap: 2px; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 800; padding: 6px 12px; border-radius: 999px; }
.nav a:hover, .nav a.active { background: var(--surface-2); color: var(--accent-strong); }
body.in-game .topbar { display: none; }

/* ── buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; cursor: pointer;
  padding: 10px 18px; border-radius: 999px; border: 2px solid var(--border); background: var(--surface);
  font-weight: 800; text-decoration: none; color: var(--text); box-shadow: var(--shadow); transition: transform .08s;
  touch-action: manipulation;
}
.btn:active, .btn.pressed { transform: translateY(4px); box-shadow: none; }
.btn:disabled { opacity: .4; cursor: default; transform: none; box-shadow: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); box-shadow: 0 4px 0 var(--accent-strong); }
.btn.big { font: 800 1.25rem var(--font-display); padding: 12px 26px; min-height: 58px; }
.btn.small { padding: 6px 12px; font-size: 0.9rem; }
.btn.danger { color: var(--bad); }
.btn.ghosty { background: transparent; box-shadow: none; border-style: dashed; color: var(--muted); }
.btn.pulse { animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { scale: 1; } 50% { scale: 1.05; } }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; }
.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; flex: none;
  border: 2px solid var(--border); background: var(--surface); cursor: pointer; text-decoration: none; font-size: 1.2rem; color: var(--text);
}
.icon-btn.toggle[aria-pressed="false"] { opacity: .45; filter: grayscale(1); }

/* ── home ── */
.hero { text-align: center; padding: 22px 0 6px; }
.title { font-size: clamp(3.2rem, 15vw, 5rem); margin: 0; letter-spacing: 0.01em; }
.title span { display: inline-block; animation: bob 2.4s ease-in-out infinite; }
.title span:nth-child(2n) { animation-delay: .3s; }
.title span:nth-child(3n) { animation-delay: .6s; }
@keyframes bob { 0%, 100% { transform: translateY(0) rotate(-3deg); } 50% { transform: translateY(-6px) rotate(3deg); } }
.title .c0 { color: var(--c0); } .title .c1 { color: var(--c1); } .title .c2 { color: var(--c2); } .title .c3 { color: var(--c3); }
.lede { font-size: 1.1rem; margin: 6px auto 18px; line-height: 1.7; }
.play-btn { font-size: 1.7rem; padding: 14px 48px; min-height: 70px; }
.legend { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin: 18px 0 4px; }
.legend-i { display: flex; align-items: center; gap: 8px; padding: 6px 12px 6px 8px; border-radius: 14px; font-size: 0.95rem; }
.legend-i.c0 { background: var(--c0-soft); } .legend-i.c1 { background: var(--c1-soft); } .legend-i.c2 { background: var(--c2-soft); } .legend-i.c3 { background: var(--c3-soft); }

.world { margin-top: 22px; background: var(--surface); border: 2px solid var(--border); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow); }
.world-head { display: flex; gap: 12px; align-items: center; }
.world-head h2 { margin: 0; font-size: 1.2rem; }
.world-head p { margin: 2px 0 0; }
.world-emoji { font-size: 2.4rem; transform: rotate(-6deg); }
.stage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 12px; }
.stage-card { display: flex; flex-direction: column; border-radius: 16px; background: var(--surface-2); overflow: hidden; border: 2px solid transparent; }
.stage-card.next { border-color: var(--accent); }
.stage-main { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 12px 6px 8px; color: var(--text); text-decoration: none; font-family: var(--font-display); font-size: 1.05rem; text-align: center; }
.stage-emoji { font-size: 1.8rem; line-height: 1.1; }
.stage-watch { text-align: center; font-size: 0.82rem; font-weight: 800; padding: 6px; text-decoration: none; background: color-mix(in srgb, var(--surface) 60%, transparent); color: var(--muted); }
.stars { color: var(--sun); letter-spacing: 1px; font-size: 1.05rem; }
.stars .off { color: var(--border); }
.chipmini { display: inline-grid; place-items: center; min-width: 24px; height: 24px; padding: 0 4px; border-radius: 7px; font: 800 .8rem var(--font-display); color: #fff !important; vertical-align: 2px; }
.chipmini.c0 { background: var(--c0); } .chipmini.c1 { background: var(--c1); } .chipmini.c2 { background: var(--c2); } .chipmini.c3 { background: var(--c3); }

.mat-card {
  display: flex; gap: 14px; align-items: center; margin-top: 22px; padding: 16px; border-radius: var(--radius);
  background: var(--surface); border: 2px dashed var(--border); color: var(--text); text-decoration: none; font-size: 1.1rem;
}
.mat-icon { display: flex; align-items: flex-end; gap: 4px; --u: 5px; --cube: 12px; }
.sticker-book .stickers { display: flex; flex-wrap: wrap; gap: 6px; font-size: 2rem; }

/* ── blocks ── */
.pc { display: inline-block; flex: none; border-radius: 3px; }
.pc-0 {
  width: var(--cube); height: var(--cube); background: var(--c0);
  box-shadow: inset -2px -2px 0 rgb(0 0 0 / .2), inset 2px 2px 0 rgb(255 255 255 / .35);
}
.pc-1 {
  width: var(--u); height: calc(var(--u) * 10); border-radius: 2px;
  background: repeating-linear-gradient(to bottom, var(--c1) 0 calc(var(--u) - 1px), var(--c1-dark) calc(var(--u) - 1px) var(--u));
  box-shadow: inset -1px 0 0 rgb(0 0 0 / .2), inset 1px 0 0 rgb(255 255 255 / .3);
}
.pc-2 {
  width: var(--flat); height: var(--flat); border-radius: 2px;
  background:
    repeating-linear-gradient(to right, transparent 0 calc(10% - 1px), rgb(0 0 0 / .2) calc(10% - 1px) 10%),
    repeating-linear-gradient(to bottom, var(--c2) 0 calc(10% - 1px), var(--c2-dark) calc(10% - 1px) 10%);
  box-shadow: inset 0 0 0 1px var(--c2-dark);
}
.pc-3 {
  width: calc(var(--flat) - 4px); height: calc(var(--flat) - 4px); border-radius: 2px; margin: 4px 4px 0 0;
  background:
    repeating-linear-gradient(to right, transparent 0 calc(10% - 1px), rgb(0 0 0 / .2) calc(10% - 1px) 10%),
    repeating-linear-gradient(to bottom, var(--c3) 0 calc(10% - 1px), var(--c3-dark) calc(10% - 1px) 10%);
  box-shadow: inset 0 0 0 1px var(--c3-dark), 1px -1px 0 var(--c3-dark), 2px -2px 0 var(--c3-dark), 3px -3px 0 var(--c3-dark), 4px -4px 0 var(--c3-dark);
}
.pc.mini { --u: 3px; --cube: 12px; --flat: 20px; }
.legend .pc-1.mini { --u: 2.2px; }
.ghost { position: fixed; margin: 0 !important; transform-origin: 0 0; z-index: 60; pointer-events: none; }

/* ── the board: one lane per place ── */
.board {
  --u: 13px; --cube: 15px; --flat: 22px; --rowof: 5;
  display: grid; grid-template-columns: 22px repeat(var(--lanes), minmax(0, 1fr)); column-gap: 6px; align-items: stretch;
  user-select: none; -webkit-user-select: none;
}
.board.places-2 { --lanes: 2; }
.board.places-3 { --lanes: 3; --u: 8.5px; --cube: 12px; --flat: 15px; }
.board.places-4 { --lanes: 4; --u: 6.4px; --cube: 10px; --flat: 17px; --rowof: 3; }
.board.mat { grid-template-columns: repeat(var(--lanes), minmax(0, 1fr)); }
@media (min-width: 620px) {
  .board { --u: 16px; --cube: 20px; }
  .board.places-3 { --u: 11px; --cube: 16px; --flat: 26px; }
  .board.places-4 { --u: 8.6px; --cube: 13px; --flat: 24px; --rowof: 5; }
}
.lane { display: flex; flex-direction: column; border-radius: 18px; padding: 0 0 10px; min-width: 0; transition: box-shadow .2s, opacity .2s; }
.lane.p0 { background: var(--c0-soft); --lc: var(--c0); }
.lane.p1 { background: var(--c1-soft); --lc: var(--c1); }
.lane.p2 { background: var(--c2-soft); --lc: var(--c2); }
.lane.p3 { background: var(--c3-soft); --lc: var(--c3); }
.board.focusing .lane:not(.active) { opacity: .78; }
.lane.active { box-shadow: 0 0 0 4px var(--lc), 0 8px 24px color-mix(in srgb, var(--lc) 35%, transparent); opacity: 1; }
.lh { height: 34px; display: flex; align-items: center; justify-content: center; gap: 6px; font: 800 0.95rem var(--font-display); }
.lane .lh { background: var(--lc); color: #fff; border-radius: 16px 16px 0 0; }
.lh .chip { display: none; }
@media (max-width: 420px) {
  .places-4 .lh .lname, .places-3 .lh .lname { display: none; }
  .places-4 .lh .chip, .places-3 .lh .chip { display: inline; }
}

.cell { height: 50px; display: flex; align-items: center; justify-content: center; font: 800 2.4rem/1 var(--font-display); position: relative; }
.cell.carry { height: 34px; font-size: 1.5rem; }
.cell.ans { height: 58px; border-top: 4px solid var(--text); margin: 4px -3px 0; padding-top: 2px; }
.cell.ans.asking { animation: glow 1.4s ease-in-out infinite; border-radius: 0 0 12px 12px; }
@keyframes glow { 50% { background: color-mix(in srgb, var(--lc) 18%, transparent); } }
.signs .cell.bot { font-size: 2.2rem; color: var(--text); }
.signs .cell.ans { margin-left: 0; }
.signs { align-self: start; }
.d { display: inline-block; font-weight: 800; }
.d.c0 { color: var(--c0-ink); } .d.c1 { color: var(--c1-ink); } .d.c2 { color: var(--c2-ink); } .d.c3 { color: var(--c3-ink); }
.d.struck { position: relative; opacity: .55; }
.d.struck::after { content: ""; position: absolute; left: -15%; right: -15%; top: 50%; height: 4px; background: var(--text); transform: rotate(-20deg); border-radius: 2px; }
.d.carried { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; border: 3px solid currentColor; font-size: 1.2rem; }
.d.zero-lead { opacity: .3; }
.typing { display: inline-flex; }
.typing.empty { color: var(--muted); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: .3; } }
.board.solved .cell.ans .d { animation: hop .6s ease-out; }
@keyframes hop { 40% { transform: translateY(-10px); } }

.trays { display: flex; flex-direction: column; align-items: stretch; gap: 4px; padding: 10px 6px 0; }
.no-blocks .trays { display: none; }
.tray {
  min-height: calc(var(--u) * 10 + 10px); padding: 5px; border-radius: 12px; position: relative;
  background: color-mix(in srgb, var(--surface) 70%, transparent); border: 2px dashed color-mix(in srgb, var(--lc) 40%, transparent);
  display: flex; flex-wrap: wrap; gap: 3px; align-content: flex-start; justify-content: center;
}
.tray.p0 { display: grid; grid-template-columns: repeat(5, var(--cube)); justify-content: center; align-content: start; gap: 3px; min-height: calc(var(--cube) * 2 + 16px); }
.tray.p0 .pc:nth-child(10n+1):not(:first-child), .tray.p0 .pc:nth-child(10n+2):not(:nth-child(2)),
.tray.p0 .pc:nth-child(10n+3):not(:nth-child(3)), .tray.p0 .pc:nth-child(10n+4):not(:nth-child(4)),
.tray.p0 .pc:nth-child(10n+5):not(:nth-child(5)) { margin-top: 6px; }
/* Hundreds and thousands: small, side by side in rows (of 5 when there's room), so they can be counted. */
.tray.p2, .tray.p3 { display: grid; grid-template-columns: repeat(var(--rowof), var(--flat)); justify-content: center; align-content: start; gap: 4px; }
.tray.p3 { gap: 2px; }
.tray.too-many { border-style: solid; border-color: var(--lc); animation: wiggle 1.2s ease-in-out infinite; }
@keyframes wiggle { 0%, 100% { rotate: 0deg; } 25% { rotate: -1deg; } 75% { rotate: 1deg; } }
.tray .incoming { visibility: hidden; }
.tray .lifted { transform: translateY(-10px); box-shadow: 0 0 0 3px var(--surface), 0 0 0 6px var(--lc), 0 10px 14px rgb(0 0 0 / .25); transition: transform .25s; }
.tap-here { cursor: pointer; animation: tapme 1.1s ease-in-out infinite; border-radius: 12px; }
.cell.tap-here { background: color-mix(in srgb, var(--lc) 22%, transparent); }
.lane.tap-here { animation: tapLane 1.1s ease-in-out infinite; }
@keyframes tapLane { 50% { box-shadow: 0 0 0 6px var(--lc), 0 0 22px var(--lc); } }
.tap-here.pressed { transform: scale(.96); }
.fly-digit.held { animation: float 1.2s ease-in-out infinite; }
@keyframes float { 50% { translate: 0 -6px; } }
.counts .tray::after, .mat .tray::after {
  content: attr(data-count); position: absolute; right: 4px; bottom: 2px; font: 800 0.95rem var(--font-display); color: var(--lc);
}
.tray-sep { text-align: center; font: 800 1.2rem/1 var(--font-display); color: var(--lc); }
.tray-note { text-align: center; font-weight: 800; font-size: 0.85rem; min-height: 1.2em; color: var(--muted); }
.tappable, .tappable-each .pc { cursor: pointer; }
.tappable { animation: tapme 1.2s ease-in-out infinite; border-radius: 12px; }
.tappable-each { outline: 3px dashed var(--lc); outline-offset: 2px; }
.tappable-each .pc { animation: jiggle .9s ease-in-out infinite; }
@keyframes tapme { 50% { box-shadow: 0 0 0 5px color-mix(in srgb, var(--lc) 45%, transparent); } }
@keyframes jiggle { 50% { transform: translateY(-2px); } }

/* ── flying things ── */
#fx { position: fixed; inset: 0; pointer-events: none; z-index: 60; overflow: hidden; }
.fly-digit {
  display: grid; place-items: center; border-radius: 50%; font: 800 1.9rem/1 var(--font-display);
  background: var(--surface); box-shadow: 0 6px 18px rgb(0 0 0 / .25); border: 3px solid currentColor;
}
.fly-digit.chip { flex-direction: column; border-radius: 14px; width: auto !important; min-width: 44px; padding: 0 6px; line-height: .9; }
.fly-digit small { font: 800 .65rem var(--font-body); }
.fly-digit .d.c0, .fly-digit:has(.c0) { color: var(--c0-ink); }
.fly-digit:has(.c1) { color: var(--c1-ink); } .fly-digit:has(.c2) { color: var(--c2-ink); } .fly-digit:has(.c3) { color: var(--c3-ink); }
.arrow { position: fixed; height: 46px; z-index: 61; }
.arrow svg { position: absolute; inset: 0; overflow: visible; }
.arrow-path, .arrow-head { fill: none; stroke-width: 6; stroke-linecap: round; stroke-linejoin: round; }
.arrow-path { stroke-dasharray: 10 9; animation: march .6s linear infinite; }
@keyframes march { to { stroke-dashoffset: -19; } }
.arrow.c0 { --ac: var(--c0); } .arrow.c1 { --ac: var(--c1); } .arrow.c2 { --ac: var(--c2); } .arrow.c3 { --ac: var(--c3); }
.arrow path { stroke: var(--ac); }
.arrow-label {
  position: absolute; left: 50%; top: -6px; transform: translate(-50%, -100%); white-space: nowrap;
  background: var(--ac); color: #fff; font: 800 1rem var(--font-display); padding: 4px 12px; border-radius: 999px;
  box-shadow: 0 4px 12px rgb(0 0 0 / .2);
}
.confetti { position: fixed; top: 0; width: 10px; height: 14px; border-radius: 2px; z-index: 70; }

/* ── play screen ── */
.play { padding-bottom: 210px; }
.play-top { display: flex; align-items: center; gap: 8px; padding: 8px 0; }
.dots { flex: 1; display: flex; justify-content: center; gap: 8px; }
.dots i { width: 14px; height: 14px; border-radius: 50%; background: var(--border); transition: .3s; }
.dots i.now { background: var(--accent); transform: scale(1.3); }
.dots i.done { background: var(--good); }
.watch-tag { font: 800 1.1rem var(--font-display); color: var(--accent-strong); }
.bubble {
  display: flex; align-items: center; gap: 10px; background: var(--surface); border: 2px solid var(--border);
  border-radius: var(--radius); padding: 8px 8px 8px 12px; margin-bottom: 12px; box-shadow: var(--shadow); min-height: 72px;
}
.mascot { font-size: 2.3rem; flex: none; animation: bob 3s ease-in-out infinite; }
.say { flex: 1; margin: 0; font: 600 1.15rem/1.3 var(--font-display); }
.say .answer { font-size: 1.4em; color: var(--accent-strong); }
.dock {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  padding: 10px 16px max(12px, env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(10px);
  border-top: 2px solid var(--border); display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.dock:empty { display: none; }
.dock .hint { margin: 0; font-size: 0.85rem; color: var(--muted); }
.dock .row { margin: 0; }
.choices { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.pad { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; width: 100%; max-width: 520px; }
.key {
  height: 54px; border-radius: 16px; border: none; cursor: pointer; font: 800 1.7rem var(--font-display); touch-action: manipulation;
  background: var(--surface); color: var(--kc, var(--text)); box-shadow: 0 4px 0 var(--border), inset 0 0 0 2px var(--border);
}
.key:active, .key.pressed { transform: translateY(4px); box-shadow: inset 0 0 0 2px var(--border); }
.key.ok { background: var(--good); color: #fff; box-shadow: 0 4px 0 color-mix(in srgb, var(--good) 60%, #000); }
.key.back { font-size: 1.3rem; }
.dock[data-place="0"] { --kc: var(--c0-ink); } .dock[data-place="1"] { --kc: var(--c1-ink); }
.dock[data-place="2"] { --kc: var(--c2-ink); } .dock[data-place="3"] { --kc: var(--c3-ink); }
@media (min-width: 620px) { .pad { grid-template-columns: repeat(12, 1fr); max-width: 760px; } }

/* ── finish ── */
.finish { text-align: center; padding-top: 40px; }
.big-stars .stars { font-size: 3.4rem; }
.new-sticker { font-weight: 800; }
.new-sticker span { display: inline-block; font-size: 4.5rem; animation: bob 2s ease-in-out infinite; }

/* ── play mat ── */
.mat-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.mat-top h1 { margin-right: auto; }
.seg { display: flex; gap: 6px; }
.seg-b { display: flex; gap: 2px; padding: 6px; border-radius: 12px; border: 2px solid var(--border); background: var(--surface); text-decoration: none; }
.seg-b.on { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
.mat-value { text-align: center; margin: 8px 0 12px; min-height: 92px; }
.mv-num { font: 800 3.4rem/1 var(--font-display); letter-spacing: 0.04em; }
.mv-num .c0 { color: var(--c0-ink); }
.mv-warn { font: 800 1.4rem/1.2 var(--font-display); color: var(--bad); padding: 10px 0; }
.mv-parts { font-weight: 800; font-size: 0.95rem; }
.mat .cell.big { height: 56px; font-size: 2.6rem; }
.mat .cell.big.over { animation: wiggle 1s ease-in-out infinite; }
.mat-pm { display: flex; justify-content: center; gap: 6px; padding: 0 4px 6px; }
.mat-pm .btn { min-width: 44px; font-size: 1.2rem; padding: 4px 10px; }
.mat .tray { margin: 0 6px; min-height: calc(var(--u) * 10 + 40px); }
.mat-trade { display: flex; flex-direction: column; gap: 6px; padding: 8px 6px 0; }
.mat-trade .btn { font-size: 0.82rem; padding: 6px 4px; white-space: nowrap; }
.board.busy button { pointer-events: none; }

/* ── grown-ups ── */
.card { background: var(--surface); border: 2px solid var(--border); border-radius: var(--radius); padding: 6px 16px 14px; }
.set { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.set input[type="checkbox"] { width: 26px; height: 26px; accent-color: var(--accent); flex: none; }
.set select, .set input[type="password"] { font: inherit; padding: 6px 10px; border-radius: 10px; border: 2px solid var(--border); background: var(--surface); color: var(--text); max-width: 46%; }
.prose p { margin: 10px 0; }

@media (max-width: 420px) {
  .stage-main { font-size: 0.92rem; }
  .btn.big { font-size: 1.1rem; padding: 10px 18px; }
  .cell { font-size: 2rem; }
  .places-4 .cell { font-size: 1.7rem; }
}
@media (prefers-reduced-motion: reduce) {
  .title span, .mascot, .btn.pulse, .tray.too-many, .tappable, .tappable-each .pc, .arrow-path, .tap-here, .fly-digit.held { animation: none !important; }
}

/* ── number sense ── */
.sense-sample { text-align: center; margin: 12px 0 0; font-size: 0.95rem; }
.sense-home .stage-main span:not(.stage-emoji):not(.stars) { font-size: 0.7rem; }
.q-card {
  position: relative; display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 130px; padding: 18px 14px; margin-bottom: 14px; border-radius: var(--radius);
  background: var(--surface); border: 3px solid var(--border); box-shadow: var(--shadow);
}
.q-card.show-blocks { padding: 10px; }
.q-card .board { width: 100%; }
.board.noside { grid-template-columns: repeat(var(--lanes), minmax(0, 1fr)); }
.board.noside .tray { margin: 8px 6px 0; }
.q-card .hear { position: absolute; right: 8px; bottom: 8px; width: 38px; height: 38px; font-size: 1rem; }
.num-big { font: 800 clamp(3rem, 16vw, 4.6rem)/1 var(--font-display); letter-spacing: 0.06em; display: inline-flex; }
.nd { display: inline-block; position: relative; transition: color .4s; }
.nd.plain { color: var(--text); }
.nd.c0 { color: var(--c0-ink); } .nd.c1 { color: var(--c1-ink); } .nd.c2 { color: var(--c2-ink); } .nd.c3 { color: var(--c3-ink); }
.nd.marked::after { content: ""; position: absolute; left: -2px; right: -2px; bottom: -8px; height: 6px; border-radius: 3px; background: var(--accent); }
.nd.lit { animation: hop .6s ease-out; }
.nd.lit::before {
  content: attr(data-place); position: absolute; left: 50%; top: 100%; transform: translate(-50%, 10px);
  font: 800 0.75rem var(--font-body); letter-spacing: 0;
}
.nd.lit::before { font-size: 1rem; }
.nd.lit[data-place="0"]::before { content: "O"; } .nd.lit[data-place="1"]::before { content: "T"; }
.nd.lit[data-place="2"]::before { content: "H"; } .nd.lit[data-place="3"]::before { content: "Th"; }
.q-card .nd.lit { margin-bottom: 18px; }
.exp, .wrd { font: 800 clamp(1.5rem, 6.5vw, 2.3rem)/1.3 var(--font-display); }
.exp i { font-style: normal; color: var(--muted); }
.plc { display: inline-flex; align-items: center; gap: 8px; font: 800 1.3rem var(--font-display); }
.plc .chipmini { min-width: 34px; height: 34px; font-size: 1rem; border-radius: 10px; }
.q-choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.q-choices.kind-words, .q-choices.kind-expanded { grid-template-columns: 1fr; }
.q-choices.kind-place.n4, .q-choices.kind-place.n3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.q-choices.kind-digit.n2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.q-choices.kind-digit.n3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.q-choices.kind-digit.n4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.choice-card {
  min-height: 72px; padding: 10px 12px; border-radius: 18px; cursor: pointer; touch-action: manipulation;
  background: var(--surface); border: 3px solid var(--border); box-shadow: var(--shadow); color: var(--text);
  display: flex; align-items: center; justify-content: center; text-align: center; transition: transform .08s, background .2s;
}
.choice-card:active { transform: translateY(4px); box-shadow: none; }
.choice-card .num-big { font-size: clamp(2rem, 9vw, 2.8rem); }
.choice-card .exp, .choice-card .wrd { font-size: clamp(1.15rem, 5vw, 1.6rem); }
.choice-card.right { background: var(--good-soft); border-color: var(--good); }
.choice-card.wrong { opacity: .4; border-style: dashed; }
.choice-card:disabled { cursor: default; }
.q-explain { text-align: center; font: 700 1.1rem/1.4 var(--font-display); min-height: 1.4em; margin: 14px 0 0; }

/* Taking away: bigger pieces, and the whole lane is the tap target. */
.lane.tap-lane { cursor: pointer; }
.places-2 .tray.taking { --cube: 24px; --u: 15px; }
.places-3 .tray.taking { --cube: 19px; --u: 10px; --flat: 22px; }
.places-4 .tray.taking { --cube: 15px; --u: 8px; --flat: 21px; }
@media (min-width: 620px) {
  .places-2 .tray.taking { --cube: 30px; --u: 18px; }
  .places-3 .tray.taking { --cube: 26px; --u: 13px; --flat: 32px; }
  .places-4 .tray.taking { --cube: 22px; --u: 11px; --flat: 30px; }
}
.tray.p0.taking { grid-template-columns: repeat(auto-fill, var(--cube)); width: 100%; }
.tray.p2.taking, .tray.p3.taking { grid-template-columns: repeat(auto-fill, var(--flat)); }
.dock .take-left { margin: 0; font: 800 1.2rem var(--font-display); }
.dock .take-left b { display: inline-block; font-size: 1.6rem; color: var(--accent-strong); min-width: 1.2em; text-align: center; }
.dock { will-change: transform; }