@layer reset, base, components, pages, motion;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { color-scheme: light; }
  body, h1, h2, h3, p { margin: 0; }
  button, input { font: inherit; }
  button, a { -webkit-tap-highlight-color: transparent; }
  img, canvas { display: block; max-width: 100%; }
  [hidden] { display: none !important; }
}

@layer base {
  :root {
    --navy-950: #08142a;
    --navy-900: #10213f;
    --navy-800: #173258;
    --ink: #13243b;
    --cream: #fff8e8;
    --paper: #fffcf4;
    --orange: #ff7b22;
    --orange-dark: #bf401e;
    --coral: #ef5c49;
    --gold: #ffd057;
    --mint: #8eddb5;
    --sky: #8ad8ef;
    --purple: #7868b9;
    --line: rgba(18, 37, 62, .15);
    --shadow: 0 22px 70px rgba(7, 20, 43, .18);
    --mouth-x: 50%;
    --mouth-y: 70%;
    --mouth-width: 24%;
    --mouth-height: 13%;
  }

  html { min-width: 320px; background: var(--navy-950); }
  body {
    min-height: 100vh;
    color: var(--ink);
    background:
      radial-gradient(circle at 12% 8%, rgba(95, 157, 196, .22), transparent 26rem),
      radial-gradient(circle at 92% 12%, rgba(255, 165, 52, .14), transparent 23rem),
      var(--navy-950);
    font-family: ui-rounded, "Avenir Next", "Segoe UI", system-ui, sans-serif;
    line-height: 1.5;
  }

  button, a { touch-action: manipulation; }
  button { color: inherit; }
  :focus-visible { outline: 4px solid #1f75ff; outline-offset: 3px; }
  .skip-link {
    position: fixed;
    z-index: 1000;
    left: 1rem;
    top: -5rem;
    padding: .75rem 1rem;
    border-radius: .7rem;
    color: white;
    background: var(--navy-900);
  }
  .skip-link:focus { top:1rem; }
  #main-content:focus { outline:none; }
  .eyebrow {
    color: var(--coral);
    font-size: .78rem;
    font-weight: 900;
    letter-spacing: .12em;
    text-transform: uppercase;
  }
  .visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
  }
}

@layer components {
  .primary-button, .quiet-button, .text-button {
    border: 0;
    cursor: pointer;
    font-weight: 850;
  }
  .primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .65rem;
    min-height: 3.25rem;
    padding: .75rem 1.25rem;
    border-radius: 1rem;
    color: #fff;
    background: linear-gradient(135deg, #ea5a2c, #f47b2a);
    box-shadow: 0 8px 0 #9f321e, 0 15px 25px rgba(151, 48, 27, .2);
  }
  .primary-button:hover { filter: brightness(1.06); transform: translateY(-1px); }
  .primary-button:active { transform: translateY(5px); box-shadow: 0 3px 0 #9f321e; }
  .primary-button:disabled { cursor: wait; opacity: .65; }
  .primary-button.compact { min-height: 2.75rem; border-radius: .8rem; box-shadow: 0 5px 0 #9f321e; }
  .quiet-button {
    min-height: 2.6rem;
    padding: .55rem .85rem;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: .8rem;
    color: inherit;
    background: rgba(255,255,255,.1);
  }
  .quiet-button:hover { background: rgba(255,255,255,.18); }
  .quiet-button:disabled { cursor: not-allowed; opacity: .42; }
  .text-button { padding: .6rem; color: #304d87; background: transparent; text-decoration: underline; }

  .loading-view {
    display: grid;
    place-content: center;
    gap: 1rem;
    min-height: 100vh;
    color: var(--cream);
    text-align: center;
    font-weight: 800;
  }
  .loading-orbit {
    width: 4.5rem;
    height: 4.5rem;
    margin: auto;
    border: .4rem solid rgba(255,255,255,.15);
    border-top-color: var(--orange);
    border-radius: 50%;
  }

  .brand-mark {
    position: relative;
    width: 4.4rem;
    height: 3.5rem;
    margin-bottom: 1.5rem;
    border-radius: 52% 44% 48% 42%;
    background: linear-gradient(145deg, #ffa42d, #e55120);
    box-shadow: inset .5rem .5rem .8rem rgba(255,255,255,.34), 0 .7rem 1.5rem rgba(0,0,0,.2);
  }
  .brand-mark span {
    position: absolute;
    width: .62rem;
    height: .62rem;
    border: .14rem solid #17223b;
    border-radius: 50%;
    background: white;
  }
  .brand-mark span:nth-child(1) { left: 1rem; top: .9rem; }
  .brand-mark span:nth-child(2) { left: 2.15rem; top: .55rem; transform: scale(.8); }
  .brand-mark span:nth-child(3) { left: 3rem; top: 1.35rem; transform: scale(1.2); }

  .form-message {
    margin-top: 1rem;
    padding: .8rem 1rem;
    border: 1px solid #d06958;
    border-radius: .75rem;
    color: #7e261c;
    background: #fff0e9;
    font-weight: 750;
  }

  .site-header {
    position: sticky;
    z-index: 40;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 3.7rem;
    padding: .45rem clamp(1rem, 3vw, 3rem);
    color: var(--cream);
    border-bottom: 1px solid rgba(255,255,255,.12);
    background: rgba(8, 20, 42, .9);
    backdrop-filter: blur(16px);
  }
  .wordmark {
    display: inline-flex;
    align-items: center;
    gap: .8rem;
    color: inherit;
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 900;
    text-decoration: none;
  }
  .mini-blob {
    position: relative;
    width: 2.2rem;
    height: 1.75rem;
    flex: 0 0 auto;
    border-radius: 50% 45% 42%;
    background: linear-gradient(145deg, #ffb13c, #ef5f24);
  }
  .mini-blob i {
    position: absolute;
    width: .36rem;
    height: .36rem;
    border: .08rem solid #13243b;
    border-radius: 50%;
    background: white;
  }
  .mini-blob i:nth-child(1) { left: .42rem; top: .42rem; }
  .mini-blob i:nth-child(2) { left: 1rem; top: .25rem; }
  .mini-blob i:nth-child(3) { left: 1.48rem; top: .7rem; }
  .account-tools { display: flex; align-items: center; justify-content: flex-end; gap: .65rem; }
  .save-status {
    max-width: 17rem;
    color: #c8d7e7;
    font-size: .76rem;
    font-weight: 750;
    text-align: right;
  }
  .save-status.is-saving { color: var(--gold); }
  .save-status.is-error { color: #ffb39f; }
  .sound-toggle {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    min-height: 2.55rem;
    padding: .45rem .7rem;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 999px;
    cursor: pointer;
    color: #eaf5ff;
    background: rgba(255,255,255,.08);
    font-size: .82rem;
    font-weight: 800;
  }
  .sound-toggle input { accent-color: var(--orange); }
  .user-chip { font-size: .85rem; color: #d8e6f2; white-space: nowrap; }
  .site-header .quiet-button { color: white; }

  .site-footer {
    display: flex;
    justify-content: center;
    gap: .8rem;
    padding: 2rem 1rem 2.5rem;
    color: #687789;
    font-size: .78rem;
  }
}

@layer pages {
  .auth-view {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(20rem, .78fr);
    width: min(74rem, calc(100% - 2rem));
    min-height: min(47rem, calc(100vh - 3rem));
    margin: 1.5rem auto;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 2rem;
    box-shadow: 0 28px 90px rgba(0,0,0,.36);
  }
  .auth-story {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(2rem, 7vw, 6rem);
    overflow: hidden;
    color: var(--cream);
    background:
      radial-gradient(circle at 75% 25%, rgba(255,202,91,.25), transparent 11rem),
      radial-gradient(circle at 16% 84%, rgba(92,194,190,.17), transparent 15rem),
      linear-gradient(145deg, #152d51, #0a1932);
  }
  .auth-story::after {
    content: "";
    position: absolute;
    right: -6rem;
    bottom: -8rem;
    width: 26rem;
    height: 19rem;
    border-radius: 50% 45% 0 0;
    background: linear-gradient(145deg, rgba(255,152,43,.96), rgba(217,65,26,.95));
    box-shadow: inset 2rem 2rem 3rem rgba(255,255,255,.18);
    transform: rotate(-8deg);
  }
  .auth-story > * { position: relative; z-index: 1; }
  .auth-story .eyebrow { color: #ffd578; }
  .auth-story h1 {
    max-width: 8ch;
    margin-top: .45rem;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(3.7rem, 8vw, 7.5rem);
    font-weight: 700;
    letter-spacing: -.065em;
    line-height: .84;
  }
  .auth-lede { max-width: 30rem; margin-top: 1.8rem; color: #d7e4ef; font-size: clamp(1rem, 2vw, 1.25rem); }
  .auth-sprouts { display: flex; gap: 1.2rem; margin-top: 3rem; color: #ffd475; }
  .auth-sprouts span:nth-child(even) { color: #77cdb1; font-size: .6rem; }
  .auth-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(1.5rem, 5vw, 4rem);
    background: var(--paper);
  }
  .auth-tabs { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 2rem; padding: .3rem; border-radius: .9rem; background: #eee8da; }
  .auth-tab { min-height: 2.8rem; border: 0; border-radius: .65rem; cursor: pointer; color: #647084; background: transparent; font-weight: 850; }
  .auth-tab.is-active { color: var(--navy-900); background: white; box-shadow: 0 .2rem .8rem rgba(20,35,55,.12); }
  .auth-card h2 { font-family: Georgia, serif; font-size: 2rem; line-height: 1.05; }
  .auth-card [role="tabpanel"] > p { margin-top: .5rem; color: #657184; }
  .auth-card form { display: grid; gap: .48rem; margin-top: 1.6rem; }
  .auth-card label { margin-top: .55rem; font-size: .88rem; font-weight: 850; }
  .auth-card input {
    width: 100%;
    min-height: 3.1rem;
    padding: .7rem .85rem;
    border: 2px solid #d6d5d0;
    border-radius: .75rem;
    color: var(--ink);
    background: white;
  }
  .auth-card input:focus { border-color: #4c79b8; outline: 3px solid rgba(76,121,184,.2); }
  .auth-card small { color: #697487; }
  .auth-card .primary-button { width: 100%; margin-top: 1.1rem; }

  .yard-view { min-height: 100vh; background: var(--cream); }
  .hub-view { min-height: calc(100vh - 8rem); padding: clamp(2.25rem, 6vw, 5rem) clamp(1rem, 4vw, 4rem) 4rem; }
  .hub-intro {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(16rem, .55fr);
    align-items: end;
    gap: 2rem;
    width: min(88rem, 100%);
    margin: 0 auto 2.5rem;
  }
  .hub-intro h1 {
    max-width: 18ch;
    margin-top: .45rem;
    font-family: Georgia, serif;
    font-size: clamp(2.4rem, 5vw, 4.8rem);
    letter-spacing: -.045em;
    line-height: .98;
  }
  .hub-intro > p { color: #59677a; font-size: 1.05rem; }
  .activity-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1rem, 2vw, 1.6rem);
    width: min(88rem, 100%);
    margin: auto;
  }
  .activity-card {
    display: flex;
    min-width: 0;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 1.5rem;
    color: inherit;
    background: #fff;
    box-shadow: 0 15px 35px rgba(20,39,62,.1);
    text-decoration: none;
    transition: transform .2s ease, box-shadow .2s ease;
  }
  .activity-card:hover { transform: translateY(-6px); box-shadow: 0 24px 50px rgba(20,39,62,.17); }
  .card-preview { position: relative; min-height: clamp(13rem, 24vw, 21rem); overflow: hidden; }
  .card-copy { display: flex; flex: 1; flex-direction: column; align-items: flex-start; padding: 1.35rem 1.35rem 1.5rem; }
  .card-kicker { color: #ae492d; font-size: .72rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
  .card-copy h2 { margin-top: .4rem; font-family: Georgia, serif; font-size: clamp(1.55rem, 2.4vw, 2.25rem); line-height: 1; }
  .card-copy p { margin-top: .8rem; color: #5d6979; }
  .card-action, .coming-pill { margin-top: auto; padding-top: 1.2rem; color: #244e8a; font-weight: 900; }
  .card-action b { display: inline-block; margin-left: .35rem; }
  .nibbles-preview { background: radial-gradient(circle at 50% 25%, #ffeaaa, #ffbb5c 52%, #ef6a2e); }
  .nibbles-preview img { width: 100%; height: 100%; position: absolute; inset: 0; object-fit: cover; object-position: center; filter: saturate(1.08); }
  .preview-number, .preview-answer {
    position: absolute;
    display: grid;
    place-content: center;
    border-radius: .8rem;
    color: var(--navy-900);
    background: #fffaf0;
    box-shadow: 0 .4rem 0 rgba(122,55,24,.2);
    font-size: clamp(1.5rem, 3vw, 2.4rem);
    font-weight: 950;
  }
  .preview-number { width: 2.9rem; aspect-ratio: 1; }
  .preview-number.one { left: 8%; top: 12%; transform: rotate(-8deg); }
  .preview-number.two { right: 8%; top: 22%; transform: rotate(9deg); }
  .preview-answer { right: 7%; bottom: 7%; padding: .35rem .65rem; color: #fff; background: var(--navy-900); }
  .galaxy-preview { background: #050916; }
  .galaxy-preview > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .55; }
  .sun { position: absolute; left: 50%; top: 50%; width: 3.5rem; height: 3.5rem; border-radius: 50%; background: #fff0a2; box-shadow: 0 0 2rem #ffb838; transform: translate(-50%,-50%); }
  .orbit { position: absolute; left: 50%; top: 50%; border: 1px solid rgba(200,223,255,.45); border-radius: 50%; transform: translate(-50%,-50%) rotate(-17deg); }
  .orbit i { position: absolute; width: .7rem; height: .7rem; border-radius: 50%; background: #87c9e9; }
  .orbit-one { width: 8rem; height: 4rem; }.orbit-one i { right: -.3rem; top: 45%; }
  .orbit-two { width: 13rem; height: 7rem; }.orbit-two i { left: 18%; bottom: -.25rem; background: #df7867; }
  .orbit-three { width: 19rem; height: 10rem; }.orbit-three i { right: 18%; top: -.3rem; background: #d9b87d; }
  .map-preview { background: linear-gradient(#8cd8ea, #c6edf2); }
  .map-preview > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .86; mix-blend-mode: multiply; }
  .map-paper { position: absolute; inset: 12% 8%; overflow: hidden; border: .35rem solid #f6e6b9; border-radius: .9rem; background: rgba(83,176,182,.68); box-shadow: 0 1rem 1.5rem rgba(32,76,89,.25); transform: rotate(-3deg); }
  .map-paper::before, .map-paper::after { content:""; position:absolute; background:rgba(255,255,255,.3); }
  .map-paper::before { inset: 0 66% 0 33%; }.map-paper::after { inset: 0 33% 0 66%; }
  .land { position:absolute; display:block; background:#89ac61; border-radius:50% 42% 55% 37%; }
  .land-one { width:44%; height:38%; left:8%; top:13%; transform:rotate(13deg); }
  .land-two { width:35%; height:48%; right:9%; top:26%; transform:rotate(-16deg); }
  .land-three { width:20%; height:20%; left:32%; bottom:8%; }
  .map-pin { position:absolute; right:30%; top:31%; color:#dc3f37; font-size:2.6rem; text-shadow:0 3px 0 white; }

  .nibbles-view { padding: .65rem clamp(.75rem, 2.5vw, 2.5rem) .8rem; background: linear-gradient(180deg, #fff9e9, #f6ecda); }
  .activity-heading {
    display: grid;
    grid-template-columns: auto minmax(24rem,1fr) minmax(15rem,.58fr);
    align-items: center;
    gap: 1rem;
    width: min(96rem,100%);
    margin: 0 auto .65rem;
  }
  .back-link { color: #2b548d; font-size: .82rem; font-weight: 900; text-decoration: none; white-space: nowrap; }
  .activity-heading h1 { margin-top: .1rem; font-family: Georgia, serif; font-size: clamp(2rem,3.2vw,3rem); letter-spacing: -.045em; line-height: .95; }
  .activity-intro { color: #5d6879; font-size: .82rem; }
  .game-layout { display: grid; grid-template-columns: minmax(0,1.48fr) minmax(21.5rem,.72fr); gap: 1rem; width: min(96rem,100%); min-height:31rem; height:calc(100dvh - 9.4rem); margin:auto; align-items:stretch; }
  .character-panel, .calculator-panel { min-width: 0; }
  .character-panel {
    display:flex;
    flex-direction:column;
    height:100%;
    padding: .55rem;
    border: 1px solid rgba(20,39,64,.12);
    border-radius: 1.6rem;
    background: rgba(255,255,255,.76);
    box-shadow: var(--shadow);
  }
  .character-stage {
    position: relative;
    flex:1;
    min-height: 0;
    overflow: hidden;
    border-radius: 1.15rem;
    background:
      radial-gradient(ellipse at 50% 90%, rgba(255,190,85,.28), transparent 38%),
      radial-gradient(circle at 50% 25%, #ffecc0, transparent 42%),
      linear-gradient(180deg, #1b355a 0 79%, #244763 79% 81%, #e7ba72 81% 100%);
    isolation: isolate;
  }
  .character-stage::before {
    content:"";
    position:absolute;
    inset:79% 0 auto;
    height:2%;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.38),transparent);
    z-index:0;
  }
  .irene-webgl { position:absolute; inset:0; z-index:1; }
  .irene-webgl canvas { width:100%; height:100%; }
  .character-art { width:100%; height:100%; object-fit:cover; object-position:center; }
  .irene-webgl.is-three .character-art { display:none; }
  /* The 2D Irene draws the whole creature herself, so the still steps aside the moment her first
     frame lands; until then it is the loading placeholder and the stage is never empty. */
  .irene-webgl.is-2d .character-art { display:none; }
  .irene-2d-canvas { position:absolute; inset:0; display:block; width:100%; height:100%; }
  .character-badge {
    position:absolute;
    z-index:8;
    top:1rem;
    left:1rem;
    padding:.55rem .8rem;
    border:1px solid rgba(255,255,255,.38);
    border-radius:999px;
    color:white;
    background:rgba(8,25,50,.7);
    backdrop-filter:blur(10px);
    font-size:.78rem;
    font-weight:850;
  }
  .mouth-target {
    position:absolute;
    z-index:7;
    left:var(--mouth-x);
    top:var(--mouth-y);
    width:var(--mouth-width);
    height:var(--mouth-height);
    transform:translate(-50%,-50%);
    cursor:pointer;
    border:3px solid transparent;
    border-radius:48% 48% 55% 55%;
    color:white;
    background:transparent;
  }
  .mouth-target span {
    position:absolute;
    left:50%;
    bottom:-2.1rem;
    padding:.3rem .55rem;
    border-radius:999px;
    opacity:.72;
    color:white;
    background:rgba(10,24,44,.72);
    font-size:.7rem;
    font-weight:900;
    white-space:nowrap;
    transform:translateX(-50%);
  }
  .mouth-target:hover, .mouth-target:focus-visible, .character-stage.is-drag-over .mouth-target {
    border-color:#fff4bd;
    background:rgba(255,213,83,.13);
    box-shadow:0 0 0 .45rem rgba(255,216,91,.18), inset 0 0 1.5rem rgba(255,219,105,.16);
  }
  .character-message {
    position:absolute;
    z-index:8;
    right:1rem;
    top:1rem;
    max-width:min(14rem,46%);
    padding:.7rem .9rem;
    border-radius:1rem 1rem .2rem 1rem;
    color:var(--navy-900);
    background:#fffdf2;
    box-shadow:0 .6rem 1.8rem rgba(5,22,45,.24);
    font-size:clamp(.8rem,1.5vw,1rem);
    font-weight:850;
  }
  .touch-hint { flex:0 0 auto; padding:.45rem .2rem 0; color:#607083; font-size:.74rem; text-align:center; }

  .calculator-panel {
    position:sticky;
    top:4.25rem;
    display:grid;
    gap:.55rem;
    height:100%;
    max-height:100%;
    overflow:auto;
    padding:.75rem;
    border:1px solid rgba(20,39,64,.13);
    border-radius:1.5rem;
    background:rgba(255,255,255,.9);
    box-shadow:0 18px 45px rgba(20,39,62,.13);
  }
  .expression-card { position:relative; overflow:hidden; min-height:7.8rem; padding:1rem; border-radius:1.1rem; color:#fff; background:linear-gradient(145deg,#142b4e,#1b3f69); }
  .expression-card::after { content:""; position:absolute; right:-2rem; top:-2rem; width:7rem; height:7rem; border-radius:50%; background:rgba(255,157,48,.16); }
  .expression-labels { display:flex; justify-content:space-between; gap:.8rem; color:#c9daea; font-size:.7rem; font-weight:850; }
  .expression-labels strong { color:#ffd77d; }
  .expression-output { position:relative; z-index:1; display:block; margin-top:.65rem; color:white; font-size:clamp(1.65rem,3vw,2.6rem); font-weight:950; letter-spacing:.02em; line-height:1.05; }
  .result-celebration { position:relative; z-index:2; display:flex; align-items:baseline; gap:.5rem; margin-top:.45rem; }
  .result-kicker { color:#ffd982; font-size:.7rem; font-weight:900; text-transform:uppercase; }
  #result-main { color:white; font-size:clamp(2.1rem,4vw,3.5rem); line-height:.9; }
  #result-detail { color:#d8e9f6; font-weight:800; }
  .operation-picker { min-width:0; margin:0; padding:.6rem .7rem .75rem; border:1px solid var(--line); border-radius:1rem; }
  .operation-picker legend, .tray-heading h2 { padding:0 .2rem; font-size:.82rem; font-weight:900; }
  .operation-buttons { display:grid; grid-template-columns:repeat(4,1fr); gap:.4rem; }
  .operation-buttons button {
    min-height:3.15rem;
    cursor:pointer;
    border:2px solid #d6dae1;
    border-radius:.75rem;
    color:var(--navy-800);
    background:#f8f7f2;
    font-size:1.65rem;
    font-weight:950;
  }
  .operation-buttons button:hover { border-color:#81a6cf; }
  .operation-buttons button[aria-pressed="true"] { border-color:#173b69; color:white; background:#245587; box-shadow:inset 0 -4px 0 rgba(0,0,0,.14); }
  .number-tray { padding:.75rem; border-radius:1rem; background:#f7ebd4; }
  .tray-heading { display:flex; align-items:center; justify-content:space-between; gap:.6rem; }
  .tray-heading span { padding:.25rem .5rem; border-radius:999px; color:#8b3b25; background:#ffe0af; font-size:.68rem; font-weight:900; }
  .number-tiles { display:grid; grid-template-columns:repeat(5,1fr); gap:.4rem; margin-top:.55rem; }
  .number-tile {
    min-width:0;
    min-height:3.4rem;
    cursor:grab;
    touch-action:none;
    border:2px solid #e1c797;
    border-radius:.75rem;
    color:#173457;
    background:linear-gradient(#fffdf5,#fff1cf);
    box-shadow:0 .25rem 0 #d4b57f;
    font-size:clamp(1.25rem,2.5vw,1.75rem);
    font-weight:950;
    user-select:none;
  }
  .number-tile:hover { transform:translateY(-2px); }
  .number-tile.is-selected { border-color:#e7552c; color:#9a301d; background:#fff0dd; box-shadow:0 0 0 .2rem rgba(235,92,43,.2),0 .25rem 0 #d29a6a; }
  .number-tile:disabled { cursor:not-allowed; opacity:.45; transform:none; }
  .number-tile.custom-tile { grid-column:span 2; }
  .drag-ghost { position:fixed; z-index:999; display:grid; place-items:center; width:4rem; height:4rem; pointer-events:none; border:.2rem solid white; border-radius:1rem; color:white; background:#e75f2c; box-shadow:0 1rem 2rem rgba(0,0,0,.28); font-size:1.8rem; font-weight:950; transform:translate(-50%,-50%) rotate(-6deg); }
  .number-builder-disclosure { margin-top:.55rem; padding-top:.45rem; border-top:1px dashed #caa96e; }
  .number-builder-disclosure summary { cursor:pointer; color:#704925; font-size:.72rem; font-weight:900; }
  .number-builder { display:grid; gap:.25rem; margin-top:.45rem; }
  .number-builder label { font-size:.72rem; font-weight:900; }
  .number-builder > div { display:grid; grid-template-columns:1fr auto; gap:.4rem; }
  .number-builder input { min-width:0; min-height:2.65rem; padding:.45rem .65rem; border:2px solid #d5b97d; border-radius:.65rem; background:#fffdf7; }
  .number-builder button { border:0; border-radius:.65rem; color:white; background:#ca542b; font-size:.75rem; font-weight:900; cursor:pointer; }
  .number-builder small { color:#74664f; font-size:.65rem; }
  .builder-error { color:#8d2d20; font-size:.72rem; font-weight:800; }
  .game-actions { display:flex; justify-content:flex-end; gap:.5rem; }
  .calculator-panel .quiet-button { border-color:#ccd2da; color:#30465f; background:#f4f5f6; }
  .keyboard-hint { color:#718092; font-size:.68rem; text-align:center; }
}

@layer components {
  .game-layout { height:auto; min-height:calc(100dvh - 10rem); align-items:start; }
  .character-panel { gap:.45rem; height:auto; }
  .character-stage { flex:none; min-height:25rem; height:clamp(25rem,54vh,38rem); }
  .calculator-panel { position:relative; top:auto; height:auto; max-height:none; overflow:visible; }
  .touch-hint { min-height:1.7rem; padding:.35rem .35rem 0; }
  .snack-table {
    display:grid;
    gap:.65rem;
    min-height:11rem;
    padding:.72rem;
    border:1px solid #bc8a4d;
    border-radius:1rem 1rem 1.35rem 1.35rem;
    background:linear-gradient(180deg,#fff2c9,#efd19b);
    box-shadow:inset 0 .22rem 0 rgba(255,255,255,.6),0 .35rem 0 #9e6338;
  }
  .story-strip { display:grid; grid-template-columns:minmax(0,1fr) minmax(8rem,.25fr); gap:.6rem; align-items:stretch; }
  .story-boards { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:.45rem; }
  .story-board {
    display:flex; align-items:center; justify-content:space-between; gap:.4rem; min-height:3.8rem; padding:.45rem .65rem;
    border:2px solid #d1a360; border-radius:.72rem; color:#173457; background:#fffdf4; box-shadow:0 .18rem 0 #b77943;
  }
  .story-board .board-label { color:#745633; font-size:.62rem; font-weight:900; line-height:1.05; text-transform:uppercase; }
  .story-board .board-value { font-size:2rem; line-height:1; }
  .operation-board { border-style:dashed; background:#edf4ff; }
  .role-board { background:#fff8dc; }
  .role-board.is-refused { border-color:#c9362b; background:#fff0ed; }
  .ticket-slot { display:grid; place-items:center; min-height:3.8rem; padding:.4rem; border:2px dashed #83699f; border-radius:.7rem; color:#5c4675; background:#f6efff; }
  .ticket-placeholder { font-size:.62rem; font-weight:850; text-align:center; }
  .instruction-ticket { position:relative; padding:.5rem .7rem; border:2px solid #75538e; border-radius:.25rem; background:#fff; font-size:.74rem; font-weight:950; text-transform:uppercase; }
  .instruction-ticket::after { content:""; position:absolute; right:-2px; top:-2px; border-width:0 0 .65rem .65rem; border-style:solid; border-color:transparent transparent #dac5ec transparent; }
  .work-surface { display:grid; grid-template-columns:minmax(0,1fr) minmax(7rem,.2fr); gap:.65rem; align-items:stretch; }
  .surface-label { display:block; color:#76522e; font-size:.62rem; font-weight:950; letter-spacing:.05em; text-transform:uppercase; }
  .quantity-scene { --deal:1; --magnify:1; --cut:0; --fuse:1; --rings:1; --give:1; display:flex; align-items:center; gap:.55rem; min-height:5.5rem; overflow-x:auto; padding:.45rem; border:2px solid rgba(121,74,35,.2); border-radius:.75rem; background:rgba(255,255,255,.58); }
  .quantity-empty { color:#816d50; font-size:.74rem; font-weight:750; }
  .answer-plate { display:grid; place-items:center; align-content:center; min-height:5.5rem; border:3px double #a37548; border-radius:50%; background:#fffaf0; }
  .answer-plate strong { color:#b54322; font-size:2.25rem; line-height:1; }
  .answer-plate.has-answer { border-color:#e45c26; box-shadow:0 0 0 .28rem rgba(255,151,57,.2); }
  .crumb-groups { display:flex; flex-wrap:wrap; gap:.55rem; }
  .crumb-set { display:flex; flex-wrap:wrap; gap:.24rem; max-width:12rem; padding:.36rem; border:1px solid rgba(123,82,37,.2); border-radius:.55rem; }
  .food-crumb { display:block; width:20px; height:20px; border:2px solid #a43b16; border-radius:46% 54% 48% 52%; background:radial-gradient(circle at 35% 25%,#fff0a3,#ff9d32 45%,#db501d); box-shadow:inset -.12rem -.12rem .18rem rgba(104,35,12,.3); }
  .food-crumb.is-second { filter:hue-rotate(25deg) saturate(1.15); }
  .serving-counter, .quantity-total { color:#714526; font-size:.8rem; font-weight:950; white-space:nowrap; }
  .share-rack { display:grid; grid-template-columns:repeat(4,minmax(4.4rem,1fr)); gap:.4rem; width:100%; }
  .share-plate { display:grid; place-items:center; min-height:4.7rem; padding:.28rem; border:2px solid #5686a2; border-radius:50%; background:#f8fdff; box-shadow:inset 0 0 0 .2rem #d6edf5; }
  .share-plate.is-outline { border-style:dashed; background:rgba(248,253,255,.5); }
  .plate-portions { display:flex; align-items:center; justify-content:center; gap:.16rem; min-height:2rem; }
  .whole-piece { display:block; width:24px; height:24px; border:2px solid #a43b16; border-radius:50%; background:radial-gradient(circle at 35% 30%,#ffe89a,#f47d25); transform:scale(clamp(0,calc((var(--deal) - var(--deal-at,0)) * 9),1)); }
  .fraction-piece { display:grid; place-items:center; width:30px; height:30px; border:2px solid #a43b16; border-radius:50%; color:#5f250d; background:conic-gradient(#ff9a32 0 var(--portion),#fff7e7 var(--portion) 100%); font-size:.72rem; font-weight:950; }
  .plate-label { color:#476b7d; font-size:.55rem; font-weight:900; text-transform:uppercase; }
  .cut-board { display:flex; align-items:center; gap:.4rem; padding:.4rem; border:2px dashed #d26a32; border-radius:.65rem; background:#fff7e8; }
  .cut-label { color:#91411e; font-size:.68rem; font-weight:950; }
  .cut-board { transform:scale(calc(.7 + var(--magnify) * .3)); transform-origin:left center; }
  .cut-whole { position:relative; width:60px; height:60px; border:3px solid #a43b16; border-radius:50%; background:#fff8e5; }
  /* Equal pieces have to be equal areas: every slice is a real sector, pushed out along its own bisector. */
  .cut-whole i { position:absolute; inset:0; background:radial-gradient(circle at 38% 30%,#ffd07a,#ff9a32 62%,#f2801f); transform:translate(calc(var(--push-x,0) * var(--cut) * 5px),calc(var(--push-y,0) * var(--cut) * 5px)); }
  .cut-blade { position:absolute; top:-10%; bottom:-10%; left:0; width:3px; background:linear-gradient(#ffffff,#9fd8ff); box-shadow:0 0 .4rem rgba(80,180,255,.95); transform:translateX(calc(var(--cut) * 60px)); opacity:calc(1 - var(--cut)); }
  .quarter-pair { display:flex; align-items:center; justify-content:center; }
  .quarter-chip { display:block; width:15px; height:15px; border:2px solid #a43b16; border-radius:50% 0 0 50%; background:radial-gradient(circle at 40% 30%,#ffe89a,#ffb457); transform:translateX(calc((var(--chip-index,0) - (var(--chip-count,2) - 1) / 2) * (1 - var(--fuse)) * 30px)); }
  .quarter-chip:nth-child(even) { border-radius:0 50% 50% 0; }
  .quantity-scene[data-motion="fuse"] .quarter-pair { opacity:calc(1 - var(--fuse) * var(--fuse)); }
  .quantity-scene[data-motion="fuse"] .fraction-piece { opacity:calc(var(--fuse) * var(--fuse)); }
  .gave-back { border-style:dashed; opacity:.72; }
  .shortfall-ring { display:grid; place-items:center; width:24px; height:24px; border:2px solid #243345; border-radius:50%; color:#fff; background:#243345; font-weight:950; }
  /* Ten-frame grouping: rows of five keep a small amount countable at a glance. */
  .crumb-set[data-frame="ten"] { display:grid; grid-template-columns:repeat(5,auto); justify-content:start; }
  .crumb-set.is-empty { display:grid; place-content:center; min-width:2.7rem; min-height:2.2rem; border:2px dashed #a4835a; background:rgba(255,255,255,.42); }
  .empty-label { color:#8a6a3f; font-size:.54rem; font-weight:950; letter-spacing:.04em; text-transform:uppercase; }
  .food-crumb.is-ringed { box-shadow:inset -.12rem -.12rem .18rem rgba(104,35,12,.3),0 0 0 calc(clamp(0,(var(--rings,1) - var(--ring-at,0)) * 12,1) * 3px) #243345; }
  .working-stack .food-crumb { opacity:clamp(0,calc((var(--leave-at,2) - var(--give,1)) * 20),1); }
  .gave-back-board .food-crumb { opacity:clamp(0,calc((var(--give,1) - var(--arrive-at,0)) * 20),1); }
  .working-stack, .gave-back-board, .shortfall-strip { display:grid; justify-items:start; gap:.22rem; padding:.3rem .34rem; border-radius:.5rem; }
  .working-stack { border:2px solid rgba(121,74,35,.35); background:rgba(255,255,255,.72); }
  .working-count { color:#714526; font-size:.74rem; font-weight:950; white-space:nowrap; }
  .gave-back-board { border:2px dashed #8a6a3f; background:rgba(255,255,255,.4); }
  .board-caption { color:#7a5a35; font-size:.55rem; font-weight:950; letter-spacing:.05em; text-transform:uppercase; }
  .shortfall-strip { border:2px dashed #243345; background:#eef2f7; }
  .shortfall-strip .board-caption { color:#243345; }
  .shortfall-rings { display:flex; flex-wrap:wrap; gap:.22rem; }
  .request-ring { display:grid; place-items:center; width:24px; height:24px; border:2px dashed #243345; border-radius:50%; color:#243345; font-weight:950; }
  .shortfall-caption { max-width:17rem; color:#243345; font-size:.7rem; font-weight:900; line-height:1.25; }
  .number-line { display:grid; gap:.18rem; min-width:9.5rem; padding:.3rem .34rem; border:2px solid rgba(90,107,128,.35); border-radius:.5rem; background:rgba(255,255,255,.72); }
  .line-label { color:#34485e; font-size:.68rem; font-weight:950; white-space:nowrap; }
  .line-track { position:relative; height:1.5rem; margin-top:.35rem; border-top:2px solid #5a6b80; }
  .line-mark { position:absolute; top:.16rem; left:var(--at); color:#5a6b80; font-size:.56rem; font-weight:900; transform:translateX(-50%); }
  .line-mark.is-zero { color:#243345; }
  .line-mark.is-below { color:#8a2f22; }
  .line-mark.is-from::before, .line-mark.is-to::before { content:""; position:absolute; top:-.62rem; left:50%; width:.44rem; height:.44rem; margin-left:-.22rem; border-radius:50%; background:#e9682e; }
  .line-mark.is-to::before { background:#1f7a4d; }
  /* Larger products: labelled stacks plus a base-ten bundle instead of a cloud of loose units. */
  .crumb-groups[data-grouping="stacks"] { align-items:flex-end; gap:.32rem; }
  .unit-stack { display:grid; justify-items:center; gap:.14rem; padding:.22rem .26rem; border:1px solid rgba(123,82,37,.3); border-radius:.45rem; background:rgba(255,255,255,.72); }
  .stack-bars { display:grid; gap:2px; }
  .stack-bars i { display:block; width:20px; height:5px; border-radius:2px; background:linear-gradient(90deg,#ffb457,#db501d); }
  .stack-count { color:#714526; font-size:.62rem; font-weight:950; }
  .base-ten { display:grid; justify-items:start; gap:.16rem; padding:.26rem .3rem; border:2px dashed #7b8fa6; border-radius:.5rem; background:#f4f8ff; }
  .base-ten-pieces { display:flex; flex-wrap:wrap; align-items:flex-end; gap:3px; max-width:11rem; }
  .ten-rod { display:block; width:8px; height:38px; border:1px solid #2f4a6b; border-radius:2px; background:repeating-linear-gradient(#8fc0ee 0 3.2px,#5c8fc4 3.2px 3.8px); }
  .one-cube { display:block; width:8px; height:8px; border:1px solid #2f4a6b; border-radius:2px; background:#8fc0ee; }
  .base-ten-label { color:#31506f; font-size:.62rem; font-weight:950; white-space:nowrap; }
  .share-plate.is-empty { border-style:dashed; background:rgba(248,253,255,.42); }
  .share-plate.is-empty .plate-portions::after { content:"empty"; color:#5686a2; font-size:.55rem; font-weight:950; letter-spacing:.04em; text-transform:uppercase; }
  .story-status { min-height:3rem; padding:.65rem .75rem; border-left:.3rem solid #e9682e; border-radius:.35rem; color:#34485e; background:#fff8e9; font-size:.78rem; font-weight:800; }
  .performance-controls, .game-actions { display:flex; flex-wrap:wrap; justify-content:flex-end; gap:.45rem; }
  .number-flight-layer, .mouth-porthole { position:fixed; z-index:900; inset:0; pointer-events:none; overflow:visible; }
  .mouth-porthole { z-index:899; clip-path:polygon(0 0,0 0,0 0); }
  .story-flight-tile, .choice-flight {
    position:absolute; display:grid; place-items:center; width:58px; height:58px; border:3px solid #fff; border-radius:.8rem;
    color:#fff; background:linear-gradient(145deg,#ff9a38,#d84920); box-shadow:0 .7rem 1.5rem rgba(24,18,11,.34); font-size:1.65rem; font-weight:950; transform:translate(-50%,-50%);
  }
  .story-flight-tile[data-role="instruction"] { border-radius:.2rem; color:#4d3867; background:#f8edff; border-color:#7b5d96; }
  .story-flight-tile[data-role="answer"] { border-radius:50%; color:#8d3219; background:#fff8d9; border-color:#ffb747; }
  .choice-flight { z-index:901; width:48px; height:48px; }
  .drag-ghost { z-index:950; }
}

@layer motion {
  .loading-orbit { animation:spin 1s linear infinite; }
  .brand-mark { animation:soft-jiggle 5s ease-in-out infinite; }
  @keyframes spin { to { transform:rotate(360deg); } }
  @keyframes soft-jiggle { 0%,100%{transform:scale(1) rotate(0)} 48%{transform:scale(1.035,.97) rotate(-1deg)} 55%{transform:scale(.98,1.025) rotate(1deg)} }
}

@media (max-width: 1050px) {
  .account-tools .save-status { display:none; }
  .activity-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .activity-card:first-child { grid-column:span 2; display:grid; grid-template-columns:1.2fr .8fr; }
  .activity-card:first-child .card-preview { min-height:24rem; }
  .game-layout { grid-template-columns:minmax(0,1.2fr) minmax(20rem,.8fr); }
  .character-stage { min-height:0; }
}

@media (min-width: 781px) and (min-height: 720px) {
  .calculator-panel { position:sticky; top:4.25rem; }
}

@media (max-width: 780px) {
  .auth-view { grid-template-columns:1fr; margin:.75rem auto; border-radius:1.4rem; }
  .auth-story { min-height:18rem; padding:2rem; }
  .auth-story h1 { font-size:4rem; }
  .auth-story::after { right:-8rem; bottom:-9rem; }
  .auth-card { padding:1.5rem; }
  .site-header { position:relative; align-items:center; min-height:3.35rem; }
  .account-tools { flex-wrap:wrap; }
  .sound-toggle { font-size:0; }
  .sound-toggle span:first-of-type { font-size:1rem; }
  .hub-intro { grid-template-columns:1fr; gap:1rem; }
  .activity-grid { grid-template-columns:1fr; }
  .activity-card:first-child { grid-column:auto; display:flex; }
  .activity-card:first-child .card-preview, .card-preview { min-height:18rem; }
  .nibbles-view { padding:.4rem .45rem .7rem; }
  .activity-heading { grid-template-columns:auto minmax(0,1fr); gap:.65rem; margin-bottom:.4rem; }
  .activity-heading .eyebrow, .activity-intro { display:none; }
  .activity-heading h1 { margin:0; font-size:clamp(1.65rem,6.8vw,2.25rem); line-height:1; }
  .back-link { margin:0; font-size:.72rem; }
  .game-layout { grid-template-columns:1fr; gap:.4rem; min-height:0; height:auto; }
  .character-panel { height:auto; padding:.35rem; }
  .character-stage { flex:none; height:clamp(15rem,42vw,19rem); min-height:0; }
  .touch-hint { padding:.28rem .15rem 0; font-size:.66rem; }
  .calculator-panel { position:relative; top:auto; gap:.35rem; height:auto; max-height:none; padding:.5rem; }
  .expression-card { min-height:4.7rem; padding:.65rem .75rem; }
  .expression-output { margin-top:.3rem; font-size:1.55rem; }
  .result-celebration { margin-top:.18rem; }
  #result-main { font-size:2rem; }
  .operation-picker { padding:.35rem .45rem .45rem; }
  .operation-picker legend, .tray-heading h2 { font-size:.72rem; }
  .operation-buttons button { min-height:2.6rem; font-size:1.35rem; }
  .number-tray { padding:.5rem; }
  .number-tiles { gap:.3rem; margin-top:.35rem; }
  .number-tile { min-height:2.65rem; border-radius:.6rem; font-size:1.2rem; box-shadow:0 .18rem 0 #d4b57f; }
  .number-builder-disclosure { margin-top:.38rem; padding-top:.3rem; }
  .game-actions .quiet-button, .game-actions .primary-button { min-height:2.35rem; padding:.35rem .65rem; }
  .character-message { max-width:44%; }
  .keyboard-hint { display:none; }
  .snack-table { min-height:7.5rem; padding:.5rem; }
  .story-strip { grid-template-columns:1fr; }
  .story-board { min-height:3.25rem; padding:.35rem .5rem; }
  .story-board .board-label { font-size:.54rem; }
  .story-board .board-value { font-size:1.55rem; }
  .ticket-slot { min-height:2.35rem; }
  .work-surface { grid-template-columns:minmax(0,1fr) 6rem; }
  .quantity-scene { min-height:5rem; }
  .food-crumb { width:15px; height:15px; }
  .share-rack { grid-template-columns:repeat(2,minmax(4.2rem,1fr)); }
  .cut-whole { width:60px; height:60px; }
  [data-board], .number-tile, [data-story-action] { scroll-margin-top:4rem; }
}

@media (max-width: 480px) {
  .site-header { min-height:3.2rem; padding:.38rem .55rem; }
  .mini-blob { width:1.75rem; height:1.4rem; }
  .mini-blob i { transform:scale(.75); }
  .wordmark { gap:.45rem; font-size:.88rem; }
  .wordmark > span:last-child { max-width:7rem; line-height:1; }
  .account-tools { gap:.28rem; }
  .site-header .quiet-button, .sound-toggle { min-height:2.15rem; padding:.3rem .48rem; font-size:.7rem; }
  .user-chip { display:none; }
  .hub-view { padding-top:2rem; }
  .hub-intro h1 { font-size:2.55rem; }
  .card-preview { min-height:15rem; }
  .activity-heading { padding-inline:.2rem; }
  .activity-heading h1 { font-size:1.72rem; }
  .character-panel { border-radius:1rem; }
  .character-stage { height:15rem; border-radius:.8rem; }
  .character-badge { top:.4rem; left:.4rem; max-width:48%; padding:.35rem .5rem; font-size:.56rem; }
  .character-message { top:.4rem; right:.4rem; padding:.4rem .5rem; font-size:.61rem; }
  .mouth-target span { bottom:-1.35rem; padding:.2rem .38rem; font-size:.52rem; }
  .calculator-panel { border-radius:1rem; }
  .expression-labels { font-size:.59rem; }
  .tray-heading span { font-size:.58rem; }
  .story-boards { gap:.25rem; }
  .story-board { display:grid; justify-items:center; text-align:center; padding:.3rem .2rem; }
  .work-surface { grid-template-columns:1fr; }
  .answer-plate { min-height:4.8rem; width:min(9rem,100%); justify-self:center; }
  .quantity-scene { flex-wrap:wrap; overflow-x:visible; }
  .performance-controls, .game-actions { justify-content:stretch; }
  .performance-controls button, .game-actions button { flex:1 1 auto; }
  .site-footer { flex-wrap:wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation-duration:.001ms !important; animation-iteration-count:1 !important; scroll-behavior:auto !important; transition-duration:.001ms !important; }
  .activity-card:hover, .number-tile:hover, .primary-button:hover { transform:none; }
}