:root{color:#2f2a25;--canvas:#f5f0e8;--surface:#fffcf5;--surface-muted:#f1e7d7;--surface-raised:#fff;--ink:#2f2a25;--ink-muted:#73685c;--line:#d8cbbb;--line-strong:#8d7d6c;--accent:#8b4f39;--accent-dark:#633829;--accent-soft:#ead5c7;--success:#5f7f58;--gold:#c49132;--radius:14px;background:#f5f0e8;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:var(--canvas);min-width:320px;min-height:100vh;margin:0}button{font:inherit;cursor:pointer}.text-audio-button{color:inherit;font:inherit;box-shadow:none;background:0 0;border:0}.text-audio-button:hover{color:var(--accent)}.app-shell{place-items:center;min-height:100vh;padding:28px;display:grid}.tablet-frame{background:var(--surface);border:1px solid var(--line);border-radius:18px;width:min(100%,1024px);min-height:min(720px,100vh - 48px);padding:28px;position:relative;box-shadow:0 18px 48px #4a35231f}.back-button{border:1px solid var(--line-strong);background:var(--surface-raised);min-height:42px;color:var(--accent-dark);border-radius:999px;padding:0 16px;font-size:.98rem;font-weight:780;position:absolute;top:18px;right:18px}.level-select{gap:28px;padding-top:18px;display:grid}.level-select__header{justify-content:center;padding-right:96px;display:flex}.level-select__header h1{color:var(--ink);margin:0;font-size:3.2rem}.level-select__grid{grid-template-columns:repeat(auto-fit,minmax(132px,1fr));gap:14px;display:grid}.level-select__button{border:1px solid var(--line);background:var(--surface-raised);min-height:230px;color:var(--ink);text-align:center;border-radius:10px;gap:10px;padding:12px;display:grid;box-shadow:0 8px 20px #4a352314}.level-select__button:hover,.level-select__button:focus-visible{border-color:var(--accent)}.level-select__image{aspect-ratio:1;object-fit:cover;background:#fbf6ee;border-radius:8px;width:100%;display:block}.level-select__title{color:var(--accent-dark);font-size:1.28rem;font-weight:820;line-height:1.25}.level-select__focus{color:var(--ink-muted);font-size:1.04rem;font-weight:760;line-height:1.2}.character-coach{border:1px solid var(--line);border-radius:var(--radius);background:#fbf6ee;grid-template-columns:minmax(190px,.72fr) minmax(260px,1fr);align-items:center;gap:22px;padding:18px;display:grid}.character-coach__image{aspect-ratio:1;object-fit:contain;justify-self:center;width:min(230px,100%);display:block}.character-coach__bubble{border:1px solid var(--line-strong);background:var(--surface-raised);color:var(--accent-dark);border-radius:999px;justify-self:center;padding:10px 18px;font-size:1.75rem;font-weight:750}.character-coach__bubble.text-audio-button{border:1px solid var(--line-strong);background:var(--surface-raised)}.progress-dots{gap:8px;display:flex}.progress-dots__dot{background:#d7cec1;border-radius:50%;width:14px;height:14px}.progress-dots__dot--active{background:var(--accent)}.activity-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-raised);justify-items:center;gap:18px;padding:18px;display:grid}.activity-card__prompt{color:var(--accent-dark);font-size:2.4rem;font-weight:780}.activity-card .activity-card__prompt.text-audio-button{min-height:auto;color:var(--accent-dark);box-shadow:none;background:0 0;border:0}.activity-card__symbol{aspect-ratio:1;border:2px solid var(--line-strong);white-space:nowrap;width:min(42vw,280px);color:var(--ink);background:#fffdf8;border-radius:18px;place-items:center;font-size:8.5rem;font-weight:850;line-height:1;display:grid;box-shadow:inset 0 -8px #8b4f390f}.activity-card__symbol--medium{font-size:5.8rem}.activity-card__symbol--long{font-size:4.4rem}.join-equation,.build-board,.combine-board{justify-content:center;align-items:center;gap:12px;width:100%;min-height:170px;display:flex}.build-board,.combine-board{border:1px solid var(--line);border-radius:var(--radius);background:#fbf6ee;padding:18px}.join-equation__part,.join-equation__answer,.build-board__slot,.build-board__answer,.combine-board__part,.combine-board__answer{aspect-ratio:1;border:2px solid var(--line-strong);background:#fffdf8;border-radius:16px;place-items:center;width:min(24vw,128px);font-size:5.5rem;font-weight:850;display:grid}.join-equation__answer,.build-board__answer,.combine-board__answer{background:var(--accent-soft);border-color:var(--accent)}.join-equation__operator,.build-board__operator,.build-board__plus,.combine-board__operator{color:var(--ink-muted);font-size:3rem;font-weight:850}.build-board__slots,.build-board__slot-group{align-items:center;gap:12px;display:flex}.activity-card__actions{grid-template-columns:repeat(2,minmax(120px,1fr));gap:12px;width:100%;display:grid}.choice-grid{grid-template-columns:repeat(3,minmax(120px,1fr));gap:12px;width:100%;display:grid}.build-choice-grid{grid-template-columns:repeat(4,minmax(92px,1fr));gap:12px;width:min(100%,640px);display:grid}.combine-choice-panel{grid-template-columns:repeat(4,minmax(80px,1fr));gap:12px;width:min(100%,560px);display:grid}.activity-card button,.choice-card{border:1px solid var(--accent-dark);background:var(--accent);color:#fffaf3;border-radius:12px;min-height:64px;font-size:1.35rem;font-weight:780;box-shadow:0 8px 18px #63382924}.activity-card .text-audio-button{min-height:auto;box-shadow:none;background:0 0;border:0}.activity-card button:hover,.choice-card:hover{background:var(--accent-dark)}.choice-card--active{background:var(--accent-dark);outline:3px solid var(--accent-soft)}.activity-card .text-audio-button:hover{color:var(--accent);background:0 0}.activity-card .join-equation__sound{min-height:auto;color:var(--ink);box-shadow:none;background:#fffdf8}.activity-card .join-equation__answer.join-equation__sound{background:var(--accent-soft)}.activity-card .join-equation__sound:hover{background:var(--surface-muted)}.activity-card .combine-board__answer{background:var(--accent-soft);min-height:auto;color:var(--ink);box-shadow:none}.activity-card .combine-board__answer:hover{background:var(--surface-muted)}.word-menu{flex-wrap:wrap;justify-content:center;gap:8px;max-height:132px;padding:4px 2px 10px;display:flex;overflow-y:auto}.word-menu__button{border:1px solid var(--line);background:var(--surface-raised);min-height:42px;color:var(--ink-muted);border-radius:999px;padding:0 16px;font-size:1.02rem;font-weight:780}.word-menu__button--active,.word-menu__button:hover,.word-menu__button:focus-visible{border-color:var(--accent);background:var(--accent-dark);color:#fff}.sound-button{width:min(100%,280px)}.choice-card{color:var(--ink);border:1px solid var(--line-strong);box-shadow:none;background:#fffaf0;font-size:3rem}.choice-card:hover{background:var(--surface-muted)}.reward-panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff8e9;justify-items:center;gap:8px;padding:18px;display:grid}.reward-panel__image{aspect-ratio:1;object-fit:contain;width:min(160px,52vw)}.choice-feedback{text-align:center;min-height:40px;color:var(--success);font-size:1.8rem;font-weight:800}.reward-panel__stars{color:var(--gold);font-size:2.5rem}@media (width<=760px){.tablet-frame{padding:20px}.back-button{justify-self:end;margin-bottom:12px;position:static}.level-select__header{padding-right:0}.level-select__header h1{font-size:2.4rem}.level-select__grid{grid-template-columns:1fr}.level-select__button{text-align:left;grid-template-columns:96px 1fr;align-items:center;min-height:120px}.level-select__image{grid-row:span 2}.character-coach,.activity-card__actions,.choice-grid,.build-choice-grid,.combine-choice-panel{grid-template-columns:1fr}.join-equation,.build-board,.combine-board,.build-board__slots,.build-board__slot-group{gap:8px}.lesson-runner__header h1{font-size:2.4rem}.character-coach__bubble{font-size:1.45rem}.activity-card__prompt{font-size:2rem}.activity-card__symbol{font-size:6rem}.activity-card__symbol--medium{font-size:4.2rem}.activity-card__symbol--long{font-size:3.1rem}.join-equation__part,.join-equation__answer,.build-board__slot,.build-board__answer,.combine-board__part,.combine-board__answer{font-size:3.4rem}.join-equation__operator,.build-board__operator,.build-board__plus,.combine-board__operator{font-size:2rem}}.lesson-map{flex-direction:column;gap:8px;max-height:112px;margin-bottom:18px;padding:2px 4px 6px;display:flex;overflow-y:auto}.lesson-map__group{gap:6px;display:grid}.lesson-map__heading{color:var(--ink-muted);margin:0;font-size:.82rem;font-weight:780}.lesson-map__lessons{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.lesson-map__button{border:1px solid var(--line);width:42px;height:42px;color:var(--ink-muted);background:#fbf6ee;border-radius:50%;flex:none;font-size:1rem;font-weight:780}.lesson-map__button--active{background:var(--accent);border-color:var(--accent);color:#fffaf3}.lesson-runner{gap:18px;display:grid}.lesson-runner__header{justify-content:space-between;align-items:center;gap:16px;display:flex}.lesson-runner__header h1{color:var(--ink);letter-spacing:0;margin:0;font-size:3.2rem;font-weight:760}.lesson-runner__title-button{color:var(--ink);text-align:left}.lesson-runner__header p{color:var(--ink-muted);margin:4px 0 0;font-size:1.25rem;font-weight:720}.lesson-runner__subtitle-button{color:var(--ink-muted);text-align:left}.next-button{border:1px solid var(--accent-dark);background:var(--accent);color:#fffaf3;border-radius:12px;min-height:64px;font-size:1.35rem;font-weight:780}.adult-summary{border:1px solid var(--line);border-radius:var(--radius);color:var(--ink-muted);background:#fbf6ee;margin-top:24px;padding:16px 18px}.adult-summary h2{margin:0 0 12px;font-size:1.1rem}.adult-summary dl{gap:18px;margin:0 0 10px;display:flex}.adult-summary div{gap:4px;display:grid}.adult-summary dt{color:var(--ink-muted);font-size:.85rem}.adult-summary dd{color:var(--ink);margin:0;font-weight:780}.adult-summary p{margin:0;font-size:.9rem}