:root{--ink: #5b4331;--ink-soft: #826849;--cream: #fff5de;--paper: #fffbf0;--mint: #bfe3c6;--mint-dark: #6fae7c;--peach: #f2be9b;--pink: #efbbad;--sun: #f5cf4f;--danger: #b4452f;--good: #3f7f4d;--radius: 20px;--tap: 48px;--safe-t: env(safe-area-inset-top, 0px);--safe-b: env(safe-area-inset-bottom, 0px);--safe-l: env(safe-area-inset-left, 0px);--safe-r: env(safe-area-inset-right, 0px);color-scheme:light}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--mint);overscroll-behavior:none}body{font:17px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Noto Sans,sans-serif;color:var(--ink);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}#lmn-root{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;overflow:hidden}button{font:inherit;color:inherit}[hidden]{display:none!important}.hud{display:flex;align-items:center;gap:8px;padding:calc(8px + var(--safe-t)) calc(12px + var(--safe-r)) 8px calc(12px + 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#2f6fd6;outline-offset:2px}.btn.primary{background:var(--mint-dark);color:#fff;border-color:#4d8a59}.btn.ghost{background:transparent}.btn.link{border:0;background:none;text-decoration:underline;min-height:44px}.btn.big{min-height:56px;font-size:18px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.btn.icon{width:56px;height:56px;padding:0;font-size:24px;flex:none}.btn.icon.small{width:48px;height:48px;font-size:18px}.btn.round{width:56px;height:56px;padding:0;font-size:28px}.btn[aria-busy=true]{opacity:.7}.screen{position:absolute;top:0;right:0;bottom:0;left:0;z-index:20;overflow-y:auto;background:var(--cream);-webkit-overflow-scrolling:touch}.screen-inner{max-width:480px;margin:0 auto;padding:calc(24px + var(--safe-t)) calc(20px + var(--safe-r)) calc(32px + var(--safe-b)) calc(20px + var(--safe-l));display:flex;flex-direction:column;gap:14px}h1{font-size:26px;margin:4px 0;line-height:1.2}h2{font-size:21px;margin:4px 0}.lead{font-size:18px;margin:0}.small{font-size:15px;color:var(--ink-soft);margin:0}.facts{margin:0;padding-left:20px}.brand{display:flex;align-items:center;gap:10px}.brand-logo{font-size:40px}.form{display:flex;flex-direction:column;gap:10px}.form label,.label{font-weight:700}input:not([type=checkbox]){font:inherit;font-size:18px;min-height:52px;padding:10px 14px;border:3px solid var(--ink-soft);border-radius:14px;background:#fff;color:var(--ink);width:100%}input.otp{font-size:26px;letter-spacing:.4em;text-align:center}input:focus{outline:4px solid #2f6fd6;outline-offset:1px}.check{display:flex;gap:10px;align-items:flex-start;font-weight:400!important;font-size:15px}.check input{width:28px;height:28px;flex:none;margin:0}.form-error{color:var(--danger);font-weight:700;margin:0;min-height:1em}.dev-note{background:#fff0c2;border:2px dashed #b88a00;border-radius:12px;padding:10px;font-size:15px;margin:0}.row{display:flex;gap:8px;flex-wrap:wrap}.row .btn{flex:1}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{min-height:var(--tap);padding:8px 16px;border-radius:999px;border:3px solid var(--ink-soft);background:#fff;font-weight:700;cursor:pointer}.chip.on{background:var(--mint)}.profile-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px}.profile-card{min-height:140px;border-radius:var(--radius);border:3px solid var(--ink-soft);background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;padding:12px}.profile-card .avatar{font-size:44px}.profile-card .name{font-weight:800;font-size:19px}.profile-card .meta{font-size:14px;color:var(--ink-soft)}.card{background:#fff;border:3px solid var(--ink-soft);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:8px}.parent{display:flex;flex-direction:column;gap:14px}.loading{display:flex;flex-direction:column;align-items:center;gap:12px;padding-top:30vh}.spinner{width:44px;height:44px;border-radius:50%;border:5px solid var(--mint);border-top-color:var(--mint-dark);animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.sheet{position:absolute;top:0;right:0;bottom:0;left:0;z-index:30;background:#3c281459;display:flex;align-items:flex-end}.sheet-inner{width:100%;max-width:560px;margin:0 auto;max-height:calc(100% - 24px - var(--safe-t));background:var(--paper);border:3px solid var(--ink-soft);border-bottom:0;border-radius:26px 26px 0 0;padding:16px calc(16px + var(--safe-r)) calc(16px + var(--safe-b)) calc(16px + var(--safe-l));overflow-y:auto;-webkit-overflow-scrolling:touch;animation:up .22s ease-out}@keyframes up{0%{transform:translateY(40px);opacity:.4}}.dialog{display:flex;flex-direction:column;align-items:stretch;gap:10px;text-align:center}.dialog .portrait{width:120px;height:120px;object-fit:contain;margin:0 auto}.npc-name{font-weight:800;margin:0}.say-en{font-size:22px;font-weight:800;margin:0}.say-vi{margin:0;color:var(--ink-soft)}.reward{font-size:22px;font-weight:800;margin:0}.lesson-top{display:flex;align-items:center;justify-content:space-between;font-weight:800;margin-bottom:8px}.lesson{display:flex;flex-direction:column;gap:12px}.lesson.is-locked{pointer-events:none}.lesson-progress{display:flex;gap:6px}.lesson-progress span{flex:1;height:10px;border-radius:6px;background:#eadfc6}.lesson-progress .done{background:var(--mint-dark)}.lesson-progress .now{background:var(--sun)}.lesson-head{display:flex;gap:12px;align-items:center}.btn-speaker{width:72px;height:72px;flex:none;border-radius:50%;border:3px solid var(--ink-soft);background:var(--sun);font-size:32px;cursor:pointer}.lesson-instr{margin:0;font-weight:700;font-size:17px}.lesson-prompt{margin:2px 0 0;font-size:20px;font-weight:800}.choice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.choice-grid.n2,.choice-grid.n4{grid-template-columns:repeat(2,1fr)}.choice-card{aspect-ratio:1 / 1;min-height:96px;border-radius:18px;border:3px solid var(--ink-soft);background:#fff;padding:6px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;touch-action:manipulation}.choice-card img{width:100%;height:100%;object-fit:contain;min-height:0;pointer-events:none}.choice-card img,.match-item.right img{background:linear-gradient(90deg,#f4ecd9,#fffaf0,#f4ecd9);background-size:200% 100%;animation:shimmer 1.2s linear infinite;border-radius:12px}.choice-card img[data-loaded],.match-item.right img[data-loaded]{background:none;animation:none}@keyframes shimmer{to{background-position:-200% 0}}.choice-card span{font-weight:800}.choice-card.selected{background:var(--mint)}.choice-card.is-hidden{opacity:.15}.choice-card.correct{background:#d8f0dc;border-color:var(--good)}.guide{box-shadow:0 0 0 5px var(--sun);animation:pulse 1s ease-in-out infinite}@keyframes pulse{50%{box-shadow:0 0 0 9px #f5cf4f80}}.pending{opacity:.7}.shake{animation:shake .4s}@keyframes shake{25%{transform:translate(-6px)}75%{transform:translate(6px)}}.lesson-feedback{min-height:28px;font-weight:800;font-size:18px;text-align:center;border-radius:12px;padding:4px}.lesson-feedback.good{color:var(--good);background:#e6f5e8}.lesson-feedback.warn{color:#8a4b12;background:#fdeedd}.lesson-tools,.lesson-actions{display:flex;gap:8px;justify-content:center}.lesson-actions .btn{flex:1}.match{display:grid;grid-template-columns:1fr 1fr;gap:12px}.match-col{display:flex;flex-direction:column;gap:10px}.match-item{min-height:80px;border-radius:16px;border:3px solid var(--ink-soft);background:#fff;font-weight:800;font-size:19px;display:flex;align-items:center;justify-content:center;gap:6px;cursor:pointer;padding:6px;touch-action:none}.match-item.right img{width:72px;height:72px;object-fit:contain;pointer-events:none}.match-item.selected{background:var(--sun)}.match-item.paired.c1{background:#cfe8ff}.match-item.paired.c2{background:#ffd9e0}.match-item.paired.c3{background:#d8f0c8}.match-item.paired.c4{background:#ffe8b8}.match-item.paired.c5{background:#e6d9ff}.match-item.paired.c6{background:#c9f1ee}.match-item.paired:after{content:"\2713";font-size:14px}.mini-speaker{font-size:14px}.drag-ghost{position:fixed;left:0;top:0;z-index:100;pointer-events:none;opacity:.85;width:140px}.reorder-line{min-height:72px;border:3px dashed var(--ink-soft);border-radius:16px;padding:8px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:#fff}.reorder-pool{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.token{min-height:56px;min-width:64px;padding:8px 16px;border-radius:14px;border:3px solid var(--ink-soft);background:var(--cream);font-weight:800;font-size:20px;cursor:pointer}.token.placed{background:var(--mint)}.placeholder{color:var(--ink-soft);font-size:15px}.qty-row{display:flex;align-items:center;justify-content:center;gap:18px}.qty-count{font-size:34px;font-weight:900;min-width:48px;text-align:center}.qty-basket{min-height:64px;border:3px solid var(--ink-soft);border-radius:18px;background:#f3e2bf;display:flex;flex-wrap:wrap;gap:6px;align-items:center;justify-content:center;padding:6px}.qty-icon img{width:44px;height:44px;object-fit:contain}.diary .stages{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:10px 0}.stage-card{border:3px solid 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var(--safe-b));transform:translate(-50%,20px);opacity:0;z-index:60;background:var(--ink);color:#fff;padding:12px 18px;border-radius:16px;max-width:calc(100% - 32px);font-weight:700;pointer-events:none;transition:.2s;text-align:center}.toast.show{opacity:1;transform:translate(-50%)}.toast.good{background:var(--good)}.toast.warn{background:#9a5217}@media(max-height:520px){.screen-inner{padding-top:calc(12px + var(--safe-t));gap:10px}.loading{padding-top:10vh}.choice-card{min-height:72px}.btn-speaker{width:56px;height:56px}}@media(min-width:768px){body{font-size:18px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}