:root{color:#153d3b;font-synthesis:none;text-rendering:optimizelegibility;background:#f5f2e8;font-family:Inter,Noto Sans TC,system-ui,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(circle at 10% 8%,#f2b05f3d,#0000 28rem),radial-gradient(circle at 92% 78%,#3486812e,#0000 30rem),#f5f2e8;min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}main{width:min(920px,100% - 32px);margin:0 auto;padding:64px 0}.auth-shell{place-items:center;min-height:100vh;display:grid}.auth-card{background:#fffffcf0;border:1px solid #153d3b1f;border-radius:28px;width:min(460px,100%);padding:clamp(28px,6vw,52px);box-shadow:0 22px 70px #1b413e1f}.auth-card h1{font-size:clamp(2rem,7vw,3.2rem)}.auth-intro,.auth-help{color:#607270;line-height:1.7}.auth-card form{gap:9px;margin-top:26px;display:grid}.auth-card label{margin-top:10px;font-weight:750}.auth-card input{background:#fff;border:2px solid #d9e1dc;border-radius:12px;width:100%;padding:13px 14px}.auth-card input:focus{border-color:#1f716c;outline:3px solid #1f716c29}.login-button{color:#fff;cursor:pointer;background:#1f716c;border:0;border-radius:12px;margin-top:14px;padding:13px 20px;font-weight:800}.login-button:disabled{opacity:.65;cursor:wait}.auth-error,.sync-error{color:#a74634;font-weight:700}.auth-help{margin-top:24px;font-size:.9rem}.status-screen{place-items:center;min-height:100vh;font-weight:750;display:grid}.user-bar{border-bottom:1px solid #153d3b26;justify-content:space-between;align-items:center;margin-bottom:38px;padding-bottom:16px;display:flex}.user-bar button{color:#425e5b;cursor:pointer;background:0 0;border:1px solid #9aaba7;border-radius:999px;padding:8px 14px}.hero{margin-bottom:36px}.eyebrow{color:#bf5b32;letter-spacing:.15em;text-transform:uppercase;font-size:.78rem;font-weight:800}h1{max-width:700px;margin:8px 0 14px;font-family:Georgia,Noto Serif TC,serif;font-size:clamp(2.3rem,6vw,4.5rem);line-height:1.08}.hero>p:last-child{color:#526967;font-size:1.05rem}.dashboard,.practice{background:#fffffce6;border:1px solid #153d3b1f;border-radius:28px;padding:clamp(24px,5vw,48px);box-shadow:0 22px 70px #1b413e1f}.dashboard{margin-bottom:22px}.section-kicker{color:#bf5b32;letter-spacing:.1em;margin:0 0 6px;font-size:.78rem;font-weight:800}.dashboard h2{margin:0 0 22px}.empty-progress{color:#607270}.skill-stats{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:22px;display:grid}.overview-stats{flex-wrap:wrap;gap:10px;margin:8px 0 18px;display:flex}.overview-stats span{color:#4f6664;background:#edf3ef;border-radius:9px;padding:8px 11px;font-size:.86rem}.skill-stat{background:#f0f4ef;border-radius:16px;gap:5px;padding:16px;display:grid}.skill-stat span{color:#607270;font-weight:700}.skill-stat strong{font-family:Georgia,serif;font-size:1.65rem}.skill-stat small{color:#71817f}.retry{color:#1f716c;cursor:pointer;background:0 0;border:1px solid #1f716c;border-radius:999px;padding:10px 17px;font-weight:750}.retry:disabled{color:#98a5a1;cursor:default;border-color:#c6ceca}.retry+.retry{margin-left:8px}.retry-banner{color:#9b4d2d;font-weight:750}.favorite-toggle{color:#875b08;cursor:pointer;background:0 0;border:0;margin:12px 0 0;font-weight:750}.favorite-toggle:focus-visible{outline-offset:3px;outline:3px solid #ef9c54}.audio-controls{align-items:center;gap:16px;margin-bottom:18px;display:flex}.audio-controls audio{display:none}.speech-status{color:#607270;font-size:.88rem}.audio-controls{flex-wrap:wrap}.audio-controls select{border:1px solid #cbd8d3;border-radius:8px;padding:7px}.audio-failures{color:#8a4a24;margin:10px 0;font-size:.88rem}.parent-report{border:1px solid #dce5df;border-radius:12px;margin:14px 0;padding:12px}.parent-report summary{color:#245e59;cursor:pointer;font-weight:800}.report-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0;display:grid}.report-grid span{background:#f0f4ef;border-radius:8px;padding:9px;font-size:.85rem}.report-actions{gap:8px;display:flex}.report-actions button{color:#fff;cursor:pointer;background:#397c72;border:0;border-radius:8px;padding:8px 12px}.speak-button,.spelling-form button{color:#fff;cursor:pointer;background:#287873;border:0;border-radius:10px;padding:11px 16px;font-weight:750}.spelling-form{gap:8px;margin-bottom:16px;display:grid}.spelling-form>div{gap:10px;display:flex}.spelling-form input{border:2px solid #cddbd7;border-radius:12px;flex:1;min-width:0;padding:12px 14px;font-size:1.05rem}.sync-error{margin-bottom:0}.picker{align-items:baseline;gap:12px;margin-bottom:14px;display:flex}.picker:last-of-type{margin-bottom:30px}.picker-label{color:#607270;letter-spacing:.06em;flex:0 0 4.5rem;font-size:.82rem;font-weight:800}.picker-options{flex-wrap:wrap;gap:8px;display:flex}.vocabulary-filters{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:14px;display:grid}.vocabulary-filters label{color:#4f6664;gap:5px;font-size:.84rem;font-weight:750;display:grid}.vocabulary-filters select{color:#254f4c;background:#fff;border:1px solid #cbd8d3;border-radius:10px;min-width:0;padding:9px 10px}.chip,.next{cursor:pointer;border:0;border-radius:999px;font-weight:750}.chip{color:#44605e;background:#e8eeea;padding:8px 16px}.chip.active{color:#fff;background:#1f716c}.chip:focus-visible,.choice:focus-visible,.next:focus-visible,.retry:focus-visible{outline-offset:3px;outline:3px solid #ef9c54}.empty-practice{padding:12px 0 4px}.empty-practice p{color:#607270;line-height:1.7}.question-meta{flex-wrap:wrap;gap:8px;display:flex}.question-meta span{color:#4f6664;background:#f0f1eb;border-radius:8px;padding:5px 10px;font-size:.8rem;font-weight:700}.question-timer{color:#315b58;justify-content:space-between;align-items:center;gap:12px;margin:14px 0 6px;display:flex}.question-timer strong{font-variant-numeric:tabular-nums;font-size:1.1rem}.pause-toggle{color:#225c57;cursor:pointer;background:#eef7f5;border:1px solid #76a7a2;border-radius:999px;padding:8px 14px;font-weight:700}.pause-toggle:hover{background:#dcefeb}.pause-toggle:focus-visible{outline-offset:3px;outline:3px solid #ef9c54}.paused-message{color:#714117;background:#fff2df;border-radius:10px;margin:10px 0;padding:12px 14px;font-weight:700}.quiz-result{text-align:center;padding:18px 0 8px}.test-preview{background:#fff2df;border-radius:14px;flex-wrap:wrap;align-items:center;gap:12px;margin:14px 0;padding:14px;display:flex}.test-preview span{color:#6e6358}.question-progress{flex-wrap:wrap;gap:5px;margin:14px 0;display:flex}.question-progress span{color:#667673;background:#edf0ed;border-radius:50%;place-items:center;width:27px;height:27px;font-size:.75rem;display:grid}.question-progress .correct{color:#fff;background:#33866c}.question-progress .incorrect{color:#fff;background:#c65e4a}.question-progress .current{color:#fff;background:#bf5b32}.question-progress .uncertain{color:#704c06;background:#ffe29b}.uncertain-toggle{color:#805912;cursor:pointer;background:0 0;border:0;font-weight:750}.result-stats{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:22px 0;display:grid}.result-stats div{background:#f0f5f1;border-radius:14px;gap:6px;padding:18px 10px;display:grid}.result-stats span{color:#607270;font-size:.85rem}.result-stats strong{color:#195e59;font-variant-numeric:tabular-nums;font-size:1.35rem}h2{white-space:pre-line;margin:20px 0 26px;font-size:clamp(1.25rem,3vw,1.7rem);line-height:1.55}.choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.choice{color:#153d3b;cursor:pointer;text-align:left;background:#fff;border:2px solid #e2e7e2;border-radius:16px;align-items:center;gap:14px;min-height:68px;padding:14px 18px;display:flex}.choice:hover:not(:disabled){border-color:#56a19c;transform:translateY(-1px)}.choice strong{color:#bf5b32}.choice.correct{background:#e7f5ed;border-color:#33866c}.choice.incorrect{background:#fff0ec;border-color:#c65e4a}.choice:disabled{cursor:default;opacity:1}.feedback{min-height:118px;padding-top:20px}.translation{margin:14px 0 18px}.translation-toggle{color:#4f6664;cursor:pointer;background:0 0;border:1px dashed #9aaba7;border-radius:999px;padding:7px 14px;font-size:.88rem;font-weight:750}.translation-toggle:focus-visible{outline-offset:3px;outline:3px solid #ef9c54}.translation-text{color:#4f6664;white-space:pre-line;border-left:3px solid #d9e1dc;margin:12px 0 0;padding:14px 16px;line-height:1.8}.result{margin-bottom:4px;font-size:1.05rem;font-weight:800}.correct-text{color:#267057}.incorrect-text{color:#a74634}.next{color:#fff;background:#bf5b32;padding:11px 20px}footer{color:#607270;border-top:1px solid #e8ebe6;padding-top:18px}@media (width<=620px){main{padding:34px 0}.choices{grid-template-columns:1fr}.result-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard,.practice{border-radius:20px}.skill-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.picker{flex-direction:column;align-items:stretch;gap:6px}.vocabulary-filters{grid-template-columns:1fr}.report-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.picker-label{flex:none}}@media print{.hero,.practice,.user-bar,.retry,.report-actions{display:none!important}.dashboard{box-shadow:none}.parent-report{display:block}}@media (prefers-reduced-motion:no-preference){.choice{transition:border-color .18s,transform .18s,background .18s}}.rewards h2{margin:0 0 16px;font-size:clamp(1.8rem,5vw,2.6rem)}.level-bar{background:#e8eeea;border-radius:999px;height:12px;overflow:hidden}.level-bar>span{background:linear-gradient(90deg,#1f716c,#56a19c);border-radius:999px;height:100%;display:block}.level-note{color:#607270;margin:10px 0 20px;font-size:.92rem}.box-draw{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.box-draw .balance{color:#4f6664;font-weight:700}.box-draw .balance strong{color:#153d3b;font-family:Georgia,serif;font-size:1.3rem}.box-draw small{color:#8b9a97}.draw{color:#fff;cursor:pointer;background:#bf5b32;border:0;border-radius:999px;padding:11px 22px;font-weight:800}.draw:disabled{color:#8b8580;cursor:default;background:#d4cec9}.draw:focus-visible{outline-offset:3px;outline:3px solid #ef9c54}.draw-result{background:#f0f4ef;border-radius:16px;flex-wrap:wrap;align-items:center;gap:8px;margin:18px 0 0;padding:14px 16px;display:flex}.drawn-emoji{font-size:1.9rem;line-height:1}.rarity{border-radius:999px;padding:3px 9px;font-size:.76rem;font-style:normal;font-weight:800}.rarity.common{color:#4f6664;background:#dfe6e1}.rarity.rare{color:#1c5c86;background:#d8e9f4}.rarity.legendary{color:#8a5a12;background:#f7e6c4}.collection{grid-template-columns:repeat(auto-fill,minmax(76px,1fr));gap:10px;margin-top:20px;display:grid}.collectible{background:#fff;border:2px solid #e2e7e2;border-radius:14px;justify-items:center;gap:4px;padding:12px 6px;font-size:1.6rem;display:grid}.collectible small{color:#607270;font-size:.68rem;font-weight:700}.collectible.rare{border-color:#9cc9e2}.collectible.legendary{background:#fffaf0;border-color:#e6c274}@media (width<=620px){.collection{grid-template-columns:repeat(auto-fill,minmax(64px,1fr))}.box-draw{flex-direction:column;align-items:stretch}.draw{width:100%}}