:root{--bg:#fff8e1;--ink:#263238;--muted:#546e7a;--primary:#00a676;--primary-dark:#008763;--danger:#c0392b;--card:#fff;--classic-light:#ffe3ae;--classic-dark:#d08c3f;--kids-light:#ffecb3;--kids-dark:#ffb74d}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app{max-width:720px;margin:0 auto;padding:16px 16px 48px}.screen{flex-direction:column;gap:12px;animation:.35s screen-in;display:flex}.home-screen{text-align:center}h1{margin:24px 0 4px;font-size:44px}h2{margin:8px 0 0;font-size:30px}h3{margin:12px 0 0;font-size:20px}.subtitle{color:var(--muted);margin:0 0 8px;font-size:18px}.message,.sentence{background:#ffe082;border-radius:12px;margin:0;padding:12px 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0;font-size:16px;line-height:1.6}.analysis-list{margin:8px 0 0;padding-left:20px;font-size:16px;line-height:1.6}@media (width<=480px){h1{font-size:36px}.piece-picker{grid-template-columns:repeat(3,1fr)}}@keyframes screen-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@keyframes message-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.message{animation:.3s message-in}@keyframes banner-pop{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.banner{animation:.4s banner-pop}.square{transition:background-color .2s,box-shadow .2s}.home-screen h1{background:linear-gradient(90deg,#7c3aed,#00a676);color:#0000;-webkit-background-clip:text;background-clip:text}@keyframes star-bounce{0%,to{transform:scale(1)}50%{transform:scale(1.3)}}.banner-win .stars{animation:.9s ease-in-out infinite star-bounce;display:inline-block}@keyframes hint-pulse{0%,to{box-shadow:inset 0 0 0 3px #00c853b3}50%{box-shadow:inset 0 0 0 6px 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