:root{--bg:#f6f7fb;--surface:#fff;--ink:#1f2440;--muted:#6b7190;--line:#dfe2ee;--brand:#4f5bd5;--brand-soft:#e8eafc;--vowel:#fff1d6;--vowel-ink:#9a5b00;--good:#1f9d63;--good-soft:#dcf5e9;--fix:#e08a1e;--fix-soft:#fff0dc;--wrong:#e0525c;--wrong-soft:#fdecee;--radius:18px;color:var(--ink);background:var(--bg);font-family:Nunito,system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;margin:0}button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border:none}button:disabled{cursor:default}button:focus-visible{outline:3px solid var(--brand);outline-offset:2px}.app{max-width:760px;padding:max(24px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(48px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));margin:0 auto}.banner{background:var(--fix-soft);color:var(--vowel-ink);border-radius:12px;margin:0 0 16px;padding:12px 16px}.hero{text-align:center;margin:16px 0 28px}.hero h1{margin:0 0 6px;font-size:clamp(2rem,6vw,2.8rem);font-weight:800}.hero p{color:var(--muted);margin:0;font-size:1.15rem}.level-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin:0;padding:0;list-style:none;display:grid}.level-card{text-align:left;background:var(--surface);border:2px solid var(--line);border-radius:var(--radius);flex-direction:column;align-items:flex-start;gap:4px;width:100%;height:100%;min-height:150px;padding:16px;transition:transform .12s,border-color .12s,box-shadow .12s;display:flex}.level-card:not(:disabled):hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:0 6px 18px #4f5bd526}.level-card:disabled{opacity:.55}.level-num{color:var(--brand);text-transform:uppercase;letter-spacing:.04em;font-size:.85rem;font-weight:700}.level-pattern{font-size:1.6rem;font-weight:800}.level-desc{color:var(--muted);flex:1;font-size:.95rem}.level-meta{color:var(--muted);font-size:.85rem;font-weight:700}.practice-bar{flex-wrap:wrap;align-items:center;gap:10px 16px;margin-bottom:24px;display:flex}.practice-title{font-size:1.1rem;font-weight:800}.dots{gap:6px;margin:0 0 0 auto;padding:0;list-style:none;display:flex}.dot{background:var(--line);border-radius:50%;width:12px;height:12px}.dot.now{background:var(--brand);transform:scale(1.25)}.dot.good{background:var(--good)}.dot.tried{background:var(--fix)}.link-btn{color:var(--brand);min-height:44px;padding:10px 4px;font-weight:700}.round{flex-direction:column;align-items:center;gap:28px;display:flex}.hear-btn{color:var(--brand);background:var(--brand-soft);border-radius:999px;align-items:center;gap:10px;min-height:60px;padding:16px 28px;font-size:1.3rem;font-weight:800;display:inline-flex}.hear-btn:active{transform:scale(.97)}.boxes{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.boxes.shake{animation:.35s shake}.box{background:var(--surface);border:3px solid var(--line);border-radius:var(--radius);justify-content:center;align-items:center;width:clamp(72px,20vw,96px);height:clamp(84px,23vw,110px);font-size:clamp(2rem,8vw,2.8rem);font-weight:800;transition:border-color .15s,background .15s;display:flex;position:relative}.box.active{border-color:var(--brand);box-shadow:0 0 0 5px var(--brand-soft)}.box.correct{border-color:var(--good);background:var(--good-soft);color:var(--good);animation:.35s pop}.box.fixed{border-color:var(--fix);background:var(--fix-soft);color:var(--fix)}.box-attempt{color:var(--muted);font-size:1.15rem;text-decoration:line-through;position:absolute;bottom:4px}.box.fixed .box-attempt{color:var(--wrong);-webkit-text-decoration:line-through 2px var(--wrong);text-decoration:line-through 2px var(--wrong);font-weight:800}.badge{color:#fff;border-radius:50%;justify-content:center;align-items:center;width:26px;height:26px;font-size:.95rem;font-weight:800;display:flex;position:absolute;top:-10px;left:-10px;box-shadow:0 2px 4px #00000026}.badge-right{background:var(--good)}.badge-wrong{background:var(--wrong)}.wrong-flash{border-radius:inherit;background:var(--wrong-soft);pointer-events:none;justify-content:center;align-items:center;animation:1.4s forwards wrong-flash;display:flex;position:absolute;inset:0}.wrong-flash-text{color:var(--ink)}.wrong-flash-x{color:var(--wrong);opacity:.85;font-size:1.6em;line-height:1;position:absolute}.keyboard{flex-direction:column;align-items:center;gap:18px;width:100%;display:flex}.tiles{grid-template-columns:repeat(7,1fr);gap:8px;width:100%;max-width:560px;display:grid}.tile{background:var(--surface);border:2px solid var(--line);min-height:56px;box-shadow:0 2px 0 var(--line);border-radius:14px;font-size:1.6rem;font-weight:800}.tile:active{box-shadow:none;transform:translateY(2px)}.tile.vowel{background:var(--vowel);color:var(--vowel-ink);border-color:#f4d9a4;box-shadow:0 2px #f4d9a4}.tile.erase{color:var(--muted);grid-column:span 2;font-size:1.4rem}.primary-btn{color:#fff;background:var(--brand);border-radius:999px;min-width:200px;min-height:60px;padding:14px 32px;font-size:1.25rem;font-weight:800;box-shadow:0 4px #3a44a8}.primary-btn:active:not(:disabled){transform:translateY(3px);box-shadow:0 1px #3a44a8}.primary-btn:disabled{opacity:.4}.reveal{flex-direction:column;align-items:center;gap:16px;animation:.4s fade-in;display:flex}.reveal-msg{color:var(--muted);margin:0;font-size:1.3rem;font-weight:700}.reveal-word{letter-spacing:.04em;font-size:clamp(3rem,12vw,4.5rem);font-weight:800}.summary{text-align:center;flex-direction:column;align-items:center;gap:20px;display:flex}.summary h2{margin:8px 0 0;font-size:2rem}.summary-list{flex-wrap:wrap;justify-content:center;gap:10px;margin:0;padding:0;list-style:none;display:flex}.chip{border-radius:999px;min-height:48px;padding:10px 18px;font-size:1.2rem;font-weight:800}.chip.good{background:var(--good-soft);color:var(--good)}.chip.tried{background:var(--fix-soft);color:var(--fix)}.summary-actions{flex-direction:column;align-items:center;gap:8px;display:flex}@keyframes pop{0%{transform:scale(1)}45%{transform:scale(1.15)}to{transform:scale(1)}}@keyframes fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@keyframes wrong-flash{0%,65%{opacity:1}to{opacity:0;visibility:hidden}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-8px)}75%{transform:translate(8px)}}@media (width<=420px){.tiles{gap:6px}.tile{min-height:50px;font-size:1.4rem}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}.wrong-flash{display:none}}.box.linked-e:after{content:"e";color:var(--brand);opacity:.7;font-size:.9rem;position:absolute;bottom:4px;right:7px}.silent-e{border:3px dashed var(--brand);border-radius:var(--radius);width:clamp(52px,14vw,68px);height:clamp(84px,23vw,110px);color:var(--brand);background:var(--brand-soft);opacity:.75;flex-direction:column;justify-content:center;align-items:center;font-size:clamp(1.6rem,6vw,2.2rem);font-weight:800;display:flex}.silent-e small{font-size:.7rem;font-weight:700}.loading{text-align:center;color:var(--muted);margin-top:48px;font-size:1.2rem}.level-meta{align-items:center;gap:8px;display:flex}.meter{gap:3px;display:inline-flex}.meter-dot{background:var(--line);border-radius:50%;width:7px;height:7px}.meter-dot.on{background:var(--good)}.level-card.mastered{border-color:var(--good)}.mastered-badge{color:#e0a100;margin-left:6px}.review-tag{background:var(--brand-soft);width:fit-content;color:var(--brand);border-radius:999px;margin:-8px auto 12px;padding:4px 12px;font-size:.9rem;font-weight:700}.chip-review{opacity:.7;margin-left:6px;font-size:.8rem}.unlocked-banner{border-radius:var(--radius);background:var(--good-soft);color:var(--good);margin:0;padding:12px 20px;font-size:1.3rem;font-weight:800;animation:.5s pop}.hero h1{cursor:default;-webkit-user-select:none;user-select:none}.teacher-bar{background:var(--vowel);color:var(--vowel-ink);border-radius:12px;flex-wrap:wrap;align-items:center;gap:4px 16px;margin:-12px 0 20px;padding:8px 16px;font-weight:700;display:flex}.teacher-bar span{flex:1;min-width:180px}