:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--color-bg:#fef6e4;--color-surface:#fff;--color-surface-muted:#fff2da;--color-primary:#f9a826;--color-primary-dark:#8a4a00;--color-primary-strong:#c9720b;--color-accent:#2c9797;--color-text:#2b2340;--color-text-inverse:#fff;--color-muted:#2b2340ad;--color-correct:#1f8f57;--color-incorrect:#c94328;--color-danger:#b53a3a;--color-locked-bg:#2b23400f;--color-locked-text:#2b23408c;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4rem;--radius-sm:10px;--radius-md:16px;--radius-lg:24px;--radius-pill:999px;--shadow-sm:0 2px 8px #2b234014;--shadow-md:0 8px 20px #2b23401a;--shadow-lg:0 14px 32px #2b234029;--font-family-base:"Segoe UI", system-ui, -apple-system, sans-serif;--font-size-sm:.9rem;--font-size-base:1rem;--font-size-md:1.15rem;--font-size-lg:clamp(1.4rem, 4vw, 2rem);--font-size-xl:clamp(2.2rem, 7vw, 3.4rem);--duration-fast:.15s;--duration-base:.25s;--duration-slow:.45s;--ease-standard:cubic-bezier(.2, .7, .3, 1);--tap-target-min:44px;--auto-advance-ms:.9s}:root[data-age-band=younger]{--font-size-md:1.3rem;--font-size-lg:clamp(1.6rem, 5vw, 2.4rem);--tap-target-min:56px}:root[data-age-band=older]{--font-size-md:1.1rem}*{box-sizing:border-box}html,body,#root{height:100%}body{font-family:var(--font-family-base);background:radial-gradient(circle at top, #fffaf0 0%, var(--color-bg) 60%);color:var(--color-text);-webkit-tap-highlight-color:transparent;margin:0}button{font-family:inherit}:focus-visible{outline-offset:2px;outline:3px solid #2b6cff}.screen{min-height:100svh;padding:max(env(safe-area-inset-top), var(--space-5)) var(--space-5) max(env(safe-area-inset-bottom), var(--space-5));gap:var(--space-5);flex-direction:column;display:flex}.screen--centered{text-align:center;justify-content:center;align-items:center}.screen--top{text-align:center;padding-top:var(--space-4);justify-content:flex-start;align-items:center}.intro-eyebrow{font-size:var(--font-size-md);color:var(--color-primary-dark);margin:0;font-weight:700}.app-title{margin:.25rem 0 var(--space-6);font-size:var(--font-size-xl);color:var(--color-text)}.screen-heading{font-size:var(--font-size-lg);margin:0}.intro-card{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:520px;animation:rise-in var(--duration-slow) var(--ease-standard);padding:clamp(2rem,6vw,4rem)}@keyframes rise-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes pop-in{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.btn{border-radius:var(--radius-pill);font-size:var(--font-size-md);cursor:pointer;transition:transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease;min-height:var(--tap-target-min);min-width:var(--tap-target-min);border:none;padding:.9rem 1.8rem;font-weight:700}.btn:active{transform:scale(.97)}.btn--primary{background:linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));color:var(--color-text);box-shadow:var(--shadow-md)}.btn--large{padding:1.1rem 2.5rem;font-size:1.3rem}.btn--ghost{color:var(--color-text);background:0 0;border:2px solid #2b234033}.btn--danger{background:var(--color-danger);color:var(--color-text-inverse)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.top-bar{justify-content:space-between;align-items:center;gap:var(--space-3);width:100%;max-width:960px;margin:0 auto;display:flex}.top-bar-title{font-weight:700;font-size:var(--font-size-md);color:var(--color-muted)}.btn--icon{padding:.6rem 1rem;font-size:1rem}.profile-grid,.subject-grid,.choice-grid{gap:var(--space-5);grid-template-columns:repeat(auto-fit,minmax(150px,1fr));width:100%;max-width:720px;display:grid}.profile-card,.subject-card,.choice-card{background:var(--color-surface);border-radius:var(--radius-md);padding:var(--space-5) var(--space-4);align-items:center;gap:var(--space-2);cursor:pointer;box-shadow:var(--shadow-sm);min-height:var(--tap-target-min);transition:transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease;border:none;flex-direction:column;display:flex}.profile-card:hover:not(:disabled),.subject-card:hover:not(:disabled),.choice-card:hover:not(:disabled){box-shadow:var(--shadow-md);transform:translateY(-2px)}.profile-avatar,.subject-emoji{font-size:2.75rem}.profile-name,.subject-title{font-size:var(--font-size-md);font-weight:700}.subject-status{font-size:var(--font-size-sm);border-radius:var(--radius-pill);color:var(--color-accent);background:#2c979726;padding:.2rem .7rem;font-weight:600}.subject-summary{color:var(--color-muted);font-size:.85rem}.subject-card--soon{opacity:.7;cursor:not-allowed;position:relative}.subject-card--soon .subject-status{background:var(--color-locked-bg);color:var(--color-locked-text)}.subject-lock-badge{opacity:.6;font-size:1rem;position:absolute;top:.6rem;right:.6rem}.choice-card{color:var(--color-text);font-size:1.6rem;font-weight:800}.choice-card:disabled{cursor:default}.choice-card--correct{background:var(--color-correct);color:var(--color-text-inverse);animation:pop-in var(--duration-fast) var(--ease-standard)}.choice-card--incorrect{background:var(--color-incorrect);color:var(--color-text-inverse)}.numeric-entry{justify-content:center;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.numeric-entry-label{width:100%;color:var(--color-muted);font-weight:600}.numeric-entry-input{text-align:center;border-radius:var(--radius-md);width:7rem;min-height:var(--tap-target-min);border:2px solid #2b234033;padding:.6rem;font-size:1.6rem;font-weight:700}.hint-area{min-height:2.5rem}.hint-text{font-size:var(--font-size-base);color:var(--color-primary-dark);max-width:480px;font-weight:600}.feedback-panel{align-items:center;gap:var(--space-4);flex-direction:column;max-width:520px;display:flex}.feedback-actions{gap:var(--space-4);flex-wrap:wrap;justify-content:center;display:flex}.feedback-text--correct{color:var(--color-correct);font-size:1.2rem;font-weight:700}.feedback-text--incorrect{color:var(--color-incorrect);font-size:1.2rem;font-weight:700}.explanation-text{color:var(--color-text);font-size:1.05rem}.auto-advance-hint{color:var(--color-muted);font-size:.85rem}.result-emoji{margin:0;font-size:4rem}.result-caption{font-size:1.1rem;font-weight:600}.result-detail{color:var(--color-muted);max-width:420px;font-size:.95rem}.stars-row{gap:var(--space-2);font-size:2.5rem;line-height:1;display:flex}.star--empty{opacity:.25}.math-visual{color:var(--color-primary-dark)}.math-visual--tens-ones{flex-wrap:wrap;justify-content:center;gap:.35rem;max-width:320px;display:flex}.math-visual-tenstick{background:var(--color-primary);border-radius:4px;width:10px;height:44px;display:inline-block}.math-visual-onecube{background:var(--color-accent);border-radius:3px;align-self:flex-end;width:12px;height:12px;display:inline-block}.math-visual--number-line{width:100%;max-width:420px;height:60px}.math-visual--groups{flex-wrap:wrap;justify-content:center;gap:.6rem;max-width:420px;display:flex}.math-visual-group{background:var(--color-surface-muted);border-radius:var(--radius-sm);flex-wrap:wrap;gap:.2rem;max-width:90px;padding:.4rem;display:flex}.math-visual-dot{background:var(--color-accent);border-radius:50%;width:10px;height:10px}.turbo-prompt{font-size:clamp(2rem,6vw,3rem)}.home-header{justify-content:space-between;align-items:flex-start;gap:var(--space-4);flex-wrap:wrap;width:100%;max-width:960px;margin:0 auto;display:flex}.home-header-actions{gap:var(--space-3);flex-wrap:wrap;align-items:center;display:flex}.home-footer{padding-top:var(--space-5);justify-content:center;gap:var(--space-3);flex-wrap:wrap;margin-top:auto;display:flex}.coin-badge{background:var(--color-surface);border-radius:var(--radius-pill);box-shadow:var(--shadow-sm);white-space:nowrap;flex-shrink:0;align-items:center;gap:.35rem;padding:.5rem .9rem;font-weight:700;display:inline-flex}.progress-section{background:var(--color-surface);border-radius:var(--radius-md);width:100%;max-width:720px;padding:var(--space-5);box-shadow:var(--shadow-sm);margin:0 auto}.progress-section h3{margin:0 0 var(--space-2)}.progress-list{margin:0;padding-left:1.25rem}.evidence-badge{border-radius:var(--radius-pill);margin-left:.4rem;padding:.15rem .55rem;font-size:.8rem;font-weight:700;display:inline-block}.evidence-badge--mastered,.evidence-badge--secure{color:var(--color-correct);background:#1f8f5726}.evidence-badge--developing,.evidence-badge--early-signs{color:var(--color-primary-dark);background:#f9a82633}.evidence-badge--needs-support{color:var(--color-incorrect);background:#c943281f}.evidence-badge--not-enough-evidence{background:var(--color-locked-bg);color:var(--color-locked-text)}.reset-confirm,.confirm-sheet{gap:var(--space-4);flex-direction:column;display:flex}.form-field{text-align:left;flex-direction:column;gap:.35rem;width:100%;max-width:360px;margin:0 auto;display:flex}.form-field label{font-size:.9rem;font-weight:600}.form-field input[type=text],.form-field select{border-radius:var(--radius-sm);min-height:var(--tap-target-min);border:2px solid #2b23402e;padding:.6rem .8rem;font-size:1rem}.chip-row{gap:var(--space-2);flex-wrap:wrap;display:flex}.chip{border-radius:var(--radius-pill);background:var(--color-surface);cursor:pointer;border:2px solid #2b234026;padding:.4rem .9rem;font-size:.85rem;font-weight:600}.chip[aria-pressed=true]{background:var(--color-primary);border-color:var(--color-primary);color:var(--color-text)}.profile-row{justify-content:space-between;align-items:center;gap:var(--space-3);padding:var(--space-3) 0;border-bottom:1px solid #2b234014;display:flex}.profile-row:last-child{border-bottom:none}.update-banner{z-index:100;background:var(--color-text);color:var(--color-text-inverse);padding:.5rem var(--space-4);padding-top:calc(.5rem + env(safe-area-inset-top,0px));justify-content:center;align-items:center;gap:var(--space-3);box-shadow:var(--shadow-sm);animation:rise-in var(--duration-base) var(--ease-standard);flex-wrap:wrap;font-size:.85rem;display:flex;position:sticky;top:0}.update-banner .btn{min-height:32px;padding:.4rem .9rem;font-size:.85rem}.update-banner .btn--ghost{color:var(--color-text-inverse);border-color:#fff6}.garage-vehicle-card{position:relative}.garage-vehicle-card--owned:after{content:"✓ Owned";color:var(--color-correct);font-size:.7rem;font-weight:700;position:absolute;top:.6rem;right:.6rem}@media (width>=768px){.screen{padding-left:var(--space-7);padding-right:var(--space-7)}.profile-grid,.subject-grid,.choice-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));max-width:960px}.progress-section{max-width:960px}}@media (prefers-reduced-motion:reduce){.btn,.profile-card,.subject-card,.choice-card,.intro-card,.update-banner,.choice-card--correct{transition:none;animation:none}}