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.tile{background:#fff;border-radius:14px;padding:12px;max-width:none}.options{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.option{background:white;border:2px solid #e1e7db;font-size:20px;color:var(--ink);min-height:65px}.option.correct{background:#e4f1df;border-color:#77aa6c}.option.wrong{background:#fff0e7;border-color:#dcac82}.feedback{margin-top:22px;border-radius:16px;padding:20px;background:#f1f5e9;line-height:1.8}.feedback.bad{background:#fff3e8}.feedback p{color:#57634e;margin:7px 0 15px}.bigmath{font-size:45px;letter-spacing:5px;font-weight:700;padding:25px 0}.result{text-align:center;padding:30px}.score{font-size:74px;color:var(--green);font-weight:800}.result-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.record{background:white;border:1px solid var(--line);border-radius:16px;padding:20px;margin:12px 0;display:flex;justify-content:space-between;gap:15px;line-height:1.7}.empty{padding:60px 20px;text-align:center;background:white;border-radius:24px}.notice{color:#9b623e;font-size:13px}@media(max-width:800px){header{padding:20px;flex-wrap:wrap}.hero{padding:28px;grid-template-columns:1.3fr 1fr}h1{font-size:34px}.cards{grid-template-columns:repeat(2,1fr)}.garden-scene{padding:12px}.garden-scene .animal{font-size:43px}.stats{gap:10px}.stat{padding:16px;gap:8px}.stat strong{font-size:22px}.stat-icon{font-size:20px}}@media(max-width:520px){main{padding:0 16px}header{gap:12px}.brand{font-size:18px}nav{width:100%;justify-content:space-between}nav button{font-size:13px}.hero{grid-template-columns:1fr;padding:26px}.garden{display:none}h1{font-size:32px}.stats{margin-bottom:26px}.stat{display:block;text-align:center;padding:14px 5px}.stat-icon{display:none}.stat span{font-size:10px}.card{padding:18px;min-height:175px}.section-head small{font-size:10px}.question{padding:20px 16px}.question h2{font-size:21px}.tile .emoji{font-size:30px}.visual{padding:20px 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/* Ruby annotation keeps every syllable directly above its character. */
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