:root{--color-bg:#fff6e5;--color-bg-deep:#ffe7b8;--color-surface:#fff;--color-surface-soft:#fffaf0;--color-line:#f1e2c4;--color-text:#3b2a1a;--color-muted:#7a6650;--color-primary:#ffbe2e;--color-primary-strong:#e08a00;--color-primary-soft:#fff1cc;--color-primary-ink:#4a2c00;--color-correct:#2fb36b;--color-correct-soft:#dff6e8;--color-try-again:#ff7a45;--color-try-again-soft:#ffe8dc;--color-focus:#1f6feb;--color-math:#4c8dff;--color-math-soft:#e5efff;--color-english:#ff5d9e;--color-english-soft:#ffe6f0;--color-it:#14b8a6;--color-it-soft:#dcf7f3;--radius:24px;--radius-small:14px;--stem-size:30px;--font-child:"Nunito", system-ui, sans-serif;--font-parent:"Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;--shadow:0 10px 30px #7a52141f;--shadow-small:0 4px 12px #7a52141a;--press-edge:0 6px 0}.theme-calm{--color-bg:#f2f6f8;--color-bg-deep:#dcebf0;--color-line:#dde6ea;--color-primary:#2bb3b1;--color-primary-strong:#13807e;--color-primary-soft:#dff4f3;--color-primary-ink:#fff;--radius:16px;--stem-size:24px}*,:before,:after{box-sizing:border-box}body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-child);-webkit-font-smoothing:antialiased;margin:0}:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}.child-screen{background:radial-gradient(circle at 8% 12%, #ffbe2e38 0 120px, transparent 121px), radial-gradient(circle at 92% 18%, #ff5d9e1f 0 90px, transparent 91px), radial-gradient(circle at 88% 88%, #4c8dff29 0 140px, transparent 141px), radial-gradient(circle at 6% 92%, #14b8a61f 0 100px, transparent 101px), var(--color-bg);min-height:100vh;padding:24px 16px 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shake{25%{transform:translate(-8px)}75%{transform:translate(8px)}}@keyframes wave{50%{transform:rotate(-14deg)}}@keyframes bob{50%{transform:translateY(-5px)}}@keyframes hop{0%,to{transform:translateY(0)}40%{transform:translateY(-10px)}}@keyframes pop{0%{transform:scale(0)}70%{transform:scale(1.25)}to{transform:scale(1)}}.subject--math{--subject:var(--color-math);--subject-soft:var(--color-math-soft)}.subject--english{--subject:var(--color-english);--subject-soft:var(--color-english-soft)}.subject--it{--subject:var(--color-it);--subject-soft:var(--color-it-soft)}.subject-badge{background:var(--subject-soft);color:var(--color-text);box-shadow:inset 0 0 0 2px var(--subject);border-radius:999px;align-items:center;gap:6px;padding:6px 14px;font-weight:800;display:inline-flex}.child-topbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;max-width:960px;margin:0 auto 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var(--subject,var(--color-primary));border-radius:var(--radius-small);background:var(--subject-soft,var(--color-surface));flex-wrap:wrap;align-items:center;gap:8px;min-height:72px;padding:12px;display:flex}.sentence-hint{color:var(--color-muted);font-size:18px;font-weight:700}.tile-pool{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.tile{font:inherit;background:var(--color-primary);color:var(--color-primary-ink);box-shadow:0 4px 0 var(--color-primary-strong);cursor:pointer;border:none;border-radius:14px;padding:10px 18px;font-size:24px;font-weight:800;transition:transform .12s}.tile:hover{transform:translateY(-2px)}.tile:active{box-shadow:0 1px 0 var(--color-primary-strong);transform:translateY(3px)}.tile--placed{background:var(--color-surface);color:var(--color-text);box-shadow:0 4px 0 var(--color-line)}.result-screen{flex-direction:column;align-items:center;gap:24px;display:flex}.result-hero{border-radius:var(--radius);background:linear-gradient(180deg, var(--color-primary-soft), var(--color-surface) 60%);width:min(880px,100%);box-shadow:var(--shadow);text-align:center;flex-direction:column;align-items:center;gap:12px;padding:28px 24px;display:flex}.stars{gap:8px;margin:0;font-size:52px;display:flex}.star{filter:grayscale();opacity:.25}.star--on{filter:none;opacity:1;animation:.5s ease-out both pop}.star--on:nth-child(2){animation-delay:.15s}.star--on:nth-child(3){animation-delay:.3s}.score-ring{background:conic-gradient(var(--color-correct) calc(var(--score) * 1%), var(--color-line) 0);border-radius:50%;place-items:center;width:150px;height:150px;margin:4px 0;display:grid}.score-ring span{background:var(--color-surface);border-radius:50%;place-items:center;width:118px;height:118px;padding:8px;font-size:22px;font-weight:900;line-height:1.2;display:grid}.result-list{flex-direction:column;gap:14px;width:min(880px,100%);margin:0;padding:0;list-style:none;display:flex}.result-item{border-radius:var(--radius-small);background:var(--color-surface);box-shadow:var(--shadow-small);padding:20px 24px;font-size:19px}.result-item p{margin:6px 0}.result-item--correct{border-left:8px solid var(--color-correct)}.result-item--retry{border-left:8px solid var(--color-try-again)}.result-verdict{font-weight:900}.result-item--correct .result-verdict{color:#1d7d48}.result-item--retry .result-verdict{color:#b2461b}.result-stem{font-size:22px;font-weight:800}.result-explanation{background:var(--color-surface-soft);color:var(--color-muted);border-radius:12px;padding:10px 14px}.tickets-screen{gap:18px}.ticket-stub{border-radius:var(--radius-small);background:linear-gradient(135deg, #ffd25e, var(--color-primary));color:var(--color-primary-ink);box-shadow:var(--shadow);text-align:left;align-items:center;gap:20px;padding:22px 32px;display:flex;position:relative}.ticket-stub:before,.ticket-stub:after{content:"";background:var(--color-bg);border-radius:50%;width:26px;height:26px;position:absolute;top:50%;transform:translateY(-50%)}.ticket-stub:before{left:-13px}.ticket-stub:after{right:-13px}.ticket-stub-icon{border-right:3px dashed #4a2c004d;padding-right:20px;font-size:48px}.ticket-balance{margin:0;font-size:30px;font-weight:900}.ticket-each{opacity:.8;margin:4px 0 0;font-size:17px;font-weight:700}.streak-pill{background:var(--color-try-again-soft);border-radius:999px;margin:0;padding:8px 18px;font-size:18px;font-weight:800}.ticket-countdown{border-radius:var(--radius);background:var(--color-surface);box-shadow:var(--shadow);flex-direction:column;align-items:center;padding:20px 36px;display:flex}.countdown{font-variant-numeric:tabular-nums;color:var(--color-primary-strong);margin:0;font-size:64px;font-weight:900}.ticket-history{border-radius:var(--radius);background:var(--color-surface);width:min(560px,100%);box-shadow:var(--shadow-small);text-align:left;padding:18px 22px}.ticket-history h2{margin:0 0 10px;font-size:20px}.ticket-history ul{flex-direction:column;margin:0;padding:0;font-size:17px;list-style:none;display:flex}.ticket-history li{border-bottom:1px dashed var(--color-line);padding:8px 0}.ticket-history li:last-child{border-bottom:none}.ticket-plus{color:#1d7d48;font-weight:900}.ticket-minus{color:var(--color-muted);font-weight:900}.earned-tickets{border-radius:var(--radius-small);background:var(--color-surface);box-shadow:var(--shadow-small);padding:14px 22px}.earned-tickets .ticket-balance{font-size:22px}.earned-tickets ul{color:var(--color-muted);text-align:center;margin:6px 0 0;padding:0;font-size:17px;list-style:none}@media (width<=600px){.hero{text-align:center;flex-direction:column}.speech:before{border:14px solid #0000;border-top:0;border-bottom-color:var(--color-surface);top:-14px;left:50%;transform:translate(-50%)}.question-card{padding:22px 18px}.today-card{padding:20px 16px}.pin-keys{grid-template-columns:repeat(3,76px)}.pin-key{height:76px}.big-button{padding:14px 28px;font-size:21px}}.matching{flex-direction:column;gap:14px;display:flex}.matching-columns{grid-template-columns:1fr 1fr;gap:14px 28px;display:grid}.matching-column{flex-direction:column;gap:12px;display:flex}.match-card{min-height:60px;font:inherit;text-align:left;color:var(--color-text);border:3px solid var(--color-line);border-radius:var(--radius-small);background:var(--color-surface-soft);box-shadow:0 4px 0 var(--color-line);cursor:pointer;align-items:center;gap:10px;padding:10px 16px;font-size:21px;font-weight:800;transition:transform .12s,border-color 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10px}.blank-input:focus{outline:3px solid var(--color-focus);outline-offset:2px}@media (width<=600px){.matching-columns{gap:10px}.match-card{min-height:52px;padding:8px 10px;font-size:17px}}.lesson-card{border-radius:var(--radius);border-left:10px solid var(--subject);background:linear-gradient(90deg, var(--subject-soft), var(--color-surface) 70%);width:100%;box-shadow:var(--shadow);align-items:center;gap:16px;padding:20px 24px;display:flex}.lesson-card-icon{font-size:44px}.lesson-card-body{flex-direction:column;flex:1;gap:2px;font-size:21px;display:flex}.lesson-card-label{color:var(--color-muted);text-transform:uppercase;letter-spacing:.04em;font-size:15px;font-weight:800}.lesson-card .big-button{padding:12px 28px;font-size:20px}.lesson-screen{flex-direction:column;align-items:center;gap:22px;display:flex}.lesson-step-head{align-items:center;gap:12px;margin-bottom:8px;display:flex}.lesson-step-head .question-stem{margin:0}.lesson-text{white-space:pre-line;margin:0;font-size:23px;line-height:1.6}.worked-example{border-left:6px solid var(--subject);border-radius:var(--radius-small);background:var(--subject-soft);margin-top:18px;padding:16px 20px;font-size:22px;font-weight:700}.worked-example p{margin:4px 0}.worked-example--faded{border-left-style:dashed}.faded-prompt{color:var(--color-muted);font-style:italic;font-weight:600}.lesson-step-kind{color:var(--color-muted);text-transform:uppercase;letter-spacing:.04em;margin:0 0 2px;font-size:15px;font-weight:800}.contrast{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:18px;display:grid}.contrast-side{border-radius:var(--radius-small);padding:14px 18px;font-size:21px;font-weight:700}.contrast-side p{margin:4px 0}.contrast-side--wrong{border-left:6px solid var(--color-try-again);background:var(--color-try-again-soft)}.contrast-side--right{border-left:6px solid 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