:root{--ink:#25223a;--muted:#77738a;--cream:#fbf8f1;--purple:#7157ea;--purple-dark:#5840ca;--yellow:#ffd765;--mint:#bdebdc;--coral:#ff9e8f;--card:#fff;--shadow:0 16px 36px rgba(70,54,120,.13)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#eae5dc;color:var(--ink);font-family:'Nunito','Noto Sans TC',sans-serif}button,select{font:inherit}.app-shell{width:min(100%,820px);min-height:100dvh;margin:auto;background:var(--cream);position:relative;overflow:hidden}.screen{display:none;min-height:100dvh;padding:26px clamp(20px,5vw,54px) calc(30px + env(safe-area-inset-bottom));position:relative}.screen.active{display:flex;flex-direction:column;animation:fade .3s ease}@keyframes fade{from{opacity:0;transform:translateY(8px)}}
#home-screen{align-items:center;text-align:center;justify-content:center;background:radial-gradient(circle at 8% 10%,#e3dafa 0 9%,transparent 9.3%),radial-gradient(circle at 93% 25%,#d5f1e8 0 10%,transparent 10.3%),var(--cream)}.parent-link{position:absolute;right:22px;top:max(20px,env(safe-area-inset-top));border:0;background:#fff;padding:10px 16px;border-radius:99px;color:var(--purple-dark);font-weight:800;box-shadow:0 6px 20px #5e4ba51a}.hero-art{width:120px;height:120px;border-radius:40% 60% 55% 45%;background:var(--yellow);position:relative;margin-bottom:20px;transform:rotate(-7deg)}.hero-orbit{position:absolute;width:132px;height:70px;border:4px solid var(--purple);border-radius:50%;left:-8px;top:26px;transform:rotate(20deg)}.hero-star{display:grid;place-items:center;width:64px;height:64px;border-radius:50%;background:var(--purple);color:#fff;font-size:35px;position:absolute;left:29px;top:28px;transform:rotate(7deg)}.eyebrow{font-size:12px;letter-spacing:.18em;font-weight:900;color:var(--purple);margin:0 0 12px}h1{font-family:'Noto Sans TC',sans-serif;font-size:clamp(42px,9vw,68px);line-height:1.1;margin:0;font-weight:900;letter-spacing:-.04em}h1 span{color:var(--purple)}.lead{color:var(--muted);font-size:18px;margin:20px 0 26px}.primary-button{border:0;background:var(--purple);color:#fff;border-radius:22px;padding:17px 30px;font-size:19px;font-weight:900;box-shadow:0 9px 0 var(--purple-dark);min-width:220px;cursor:pointer}.primary-button:active{transform:translateY(5px);box-shadow:0 4px 0 var(--purple-dark)}.speech-note{font-size:12px;color:#9994a5;margin-top:22px}
.topbar,.quiz-header{display:flex;align-items:center;gap:14px;font-weight:900}.topbar>span:nth-child(2){flex:1;text-align:center}.topbar-spacer{width:46px}.icon-button{width:46px;height:46px;border:0;border-radius:50%;background:#fff;box-shadow:0 5px 16px #42366b18;color:var(--ink);font-size:28px;cursor:pointer}.section-copy{margin:52px 0 25px}.section-copy h2,.completion-screen h2{font-size:clamp(30px,7vw,48px);margin:0 0 8px}.section-copy p:last-child{color:var(--muted)}.topic-list{display:grid;gap:14px;width:100%;min-width:0}.topic-card{width:100%;min-width:0;border:0;background:#e8e1ff;border-radius:24px;padding:16px;display:flex;align-items:center;gap:13px;text-align:left;color:var(--ink);box-shadow:var(--shadow);cursor:pointer}.topic-card.disabled{background:#f0ede7;box-shadow:none;cursor:default;opacity:.82}.topic-card:focus-visible{outline:4px solid #7157ea55;outline-offset:3px}.preparation-card{display:grid;gap:12px;width:100%;padding:20px;margin-top:16px;border-radius:22px;background:#fff4cf;text-align:center;box-shadow:var(--shadow)}.preparation-card span{color:var(--muted);font-weight:800}.question-retry{align-self:center;min-width:220px;margin:12px auto 0}.topic-collage{width:92px;height:78px;position:relative;flex:none}.topic-collage:empty{display:none}.topic-collage img{position:absolute;width:55px;height:55px;object-fit:contain;filter:drop-shadow(0 7px 7px #4d3a7b22)}.topic-collage img:nth-child(1){left:0;bottom:0}.topic-collage img:nth-child(2){right:0;top:0;width:47px;height:47px}.topic-collage img:nth-child(3){right:2px;bottom:-2px;width:48px;height:48px}.topic-copy{display:block;min-width:0;flex:1}.topic-card strong{display:block;font-size:clamp(18px,5vw,24px);overflow-wrap:anywhere}.topic-card small{display:block;color:var(--muted);margin-top:4px}.topic-status{display:block;margin-top:6px;color:var(--purple-dark);font-size:13px;font-weight:900}.topic-card.disabled .topic-status{color:#827d73}.topic-arrow{font-size:24px;margin-left:auto;flex:none}.topic-load-state{text-align:center;padding:24px 12px;color:var(--muted);font-weight:800}.topic-retry{width:100%;margin-top:12px}.coming-card{margin-top:20px;border:2px dashed #d9d3c7;padding:22px;border-radius:24px;color:#8d8992;font-weight:800}
.quiz-screen{padding-top:max(20px,env(safe-area-inset-top))}.progress-track{height:10px;background:#e8e3dd;border-radius:99px;overflow:hidden;flex:1}.progress-track span{display:block;height:100%;width:25%;background:var(--purple);border-radius:99px;transition:width .35s}.quiz-header strong{font-size:14px}.prompt-wrap{text-align:center;margin:20px 0 18px}.prompt-label{margin:0;color:var(--muted);font-size:14px;font-weight:800}.sound-button{width:52px;height:52px;border:0;border-radius:50%;background:var(--yellow);color:#6a5317;margin:10px 0 4px;cursor:pointer;font-size:13px;font-weight:900}.quiz-screen h2{font-size:clamp(25px,6vw,38px);margin:5px 0}.chinese-hint{margin:3px;color:var(--muted);font-size:14px;min-height:21px}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(12px,3vw,22px);margin:auto 0}.word-card{border:3px solid transparent;background:#fff;border-radius:26px;min-height:clamp(155px,26vh,245px);padding:12px;position:relative;display:grid;place-items:center;box-shadow:var(--shadow);cursor:pointer;transition:.25s}.word-card:nth-child(4n+1){background:#f1ecff}.word-card:nth-child(4n+2){background:#e9f8f2}.word-card:nth-child(4n+3){background:#fff1df}.word-card:nth-child(4n){background:#ffeceb}.word-card img{width:100%;height:clamp(118px,20vh,190px);object-fit:contain;transition:.25s;filter:drop-shadow(0 9px 8px #463a6322)}.word-card .answer-word{position:absolute;bottom:8px;background:#fff;color:var(--purple-dark);padding:5px 11px;border-radius:99px;font-size:clamp(14px,3vw,22px);font-weight:900;opacity:0;transform:translateY(8px)}.word-card.correct{border-color:#60c9a4;transform:scale(1.045);box-shadow:0 0 0 7px #9be0c844,0 18px 42px #55a9893d}.word-card.correct img{transform:scale(1.08) translateY(-9px)}.word-card.correct .answer-word{opacity:1;transform:none}.word-card.correct::after{content:'★';position:absolute;right:-6px;top:-12px;color:#f3b923;font-size:43px;animation:pop .45s ease}.word-card.wrong{animation:nudge .35s}.word-card.hint{border-color:var(--purple);animation:hint 1s infinite}.word-card:disabled{cursor:default}@keyframes pop{from{transform:scale(0) rotate(-50deg)}}@keyframes nudge{25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}@keyframes hint{50%{transform:scale(1.035);box-shadow:0 0 0 8px #735ae42b}}.feedback{text-align:center;font-weight:900;min-height:34px;padding-top:12px;color:var(--purple-dark)}
.completion-screen{text-align:center;align-items:center;justify-content:center}.celebration{width:120px;height:120px;border-radius:50%;background:var(--yellow);display:grid;place-items:center;color:#fff;font-size:65px;box-shadow:0 0 0 18px #ffd76535;margin-bottom:30px}.completion-screen>p:not(.eyebrow){color:var(--muted);font-size:18px}.score-card{background:#fff;border-radius:28px;padding:24px;width:100%;margin:22px 0 28px;box-shadow:var(--shadow)}.score-card>span{color:var(--muted)}.score-card strong{font-size:28px;display:block;color:var(--purple);margin:6px}.learned-words{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:18px}.learned-words span{background:#f2eefc;border-radius:99px;padding:7px 11px;font-size:12px;font-weight:900}.text-button,.danger-button{border:0;background:transparent;color:var(--purple);font-weight:900;padding:18px;cursor:pointer}.parent-screen{padding-bottom:50px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stats-grid div{background:#fff;padding:18px 8px;text-align:center;border-radius:20px;box-shadow:0 6px 22px #493f6f10}.stats-grid span{display:block;color:var(--muted);font-size:12px}.stats-grid strong{display:block;font-size:27px;color:var(--purple);margin-top:4px}.settings-card{background:#fff;border-radius:25px;padding:12px 20px;margin-top:20px;box-shadow:var(--shadow)}.settings-card h3{margin:10px 0}.settings-card label{display:flex;justify-content:space-between;align-items:center;padding:17px 0;border-top:1px solid #eee9e2;gap:15px;font-weight:800}.settings-card small{display:block;color:var(--muted);font-weight:600}.settings-card select{padding:9px;border:1px solid #ddd5ef;border-radius:12px;background:#faf8ff}.settings-card input{width:24px;height:24px;accent-color:var(--purple)}.update-card{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;margin-top:14px;padding:4px 12px;border-radius:16px;background:#f1ede5}.update-card .text-button{padding:10px 4px;white-space:nowrap}.update-card p{min-width:0;margin:0;color:var(--muted);font-size:12px;font-weight:800;text-align:right}.danger-button{color:#b45b5b;margin-top:16px}
[hidden]{display:none!important}.pin-panel{display:grid;gap:10px;padding:5px 0 12px}.pin-panel p{margin:2px 0;color:var(--muted);font-size:14px}.settings-card .pin-panel .input-label{display:block;border:0;padding:2px 0 0;font-size:13px;color:var(--ink)}.recovery-message{border-radius:14px;background:#fff0e8;color:#9a432f;padding:12px;font-weight:800;font-size:14px}.settings-card .pin-panel input,.lock-card input{width:100%;height:48px;border:2px solid #ddd5ef;border-radius:15px;padding:0 14px;font-size:18px;letter-spacing:.12em;accent-color:var(--purple);background:#faf8ff}.settings-card .pin-panel input:focus,.lock-card input:focus{outline:3px solid #7157ea2d;border-color:var(--purple)}.secondary-button{border:0;border-radius:15px;background:#ece7ff;color:var(--purple-dark);min-height:46px;font-weight:900;cursor:pointer}.compact-button{display:block;padding:12px 0}.form-error{min-height:20px!important;color:#b84747!important;font-size:13px!important;font-weight:800}.timer-remaining{position:fixed;z-index:900;left:50%;bottom:calc(14px + env(safe-area-inset-bottom));transform:translateX(-50%);padding:7px 13px;border-radius:99px;background:#25223ad9;color:#fff;font-size:12px;font-weight:900;box-shadow:0 5px 16px #25223a33;white-space:nowrap;pointer-events:none}.timer-lock{position:fixed;inset:0;z-index:2000;display:flex;align-items:center;justify-content:center;padding:calc(28px + env(safe-area-inset-top)) 20px calc(28px + env(safe-area-inset-bottom));background:radial-gradient(circle at 15% 15%,#fff3a8 0 3%,transparent 3.5%),radial-gradient(circle at 85% 23%,#fff 0 2%,transparent 2.5%),linear-gradient(155deg,#6d5be7,#41369c);text-align:center;overflow:auto}.lock-stars{position:absolute;top:8%;color:#fff0a7;font-size:clamp(20px,6vw,42px);letter-spacing:.12em}.lock-card{width:min(100%,440px);border-radius:32px;padding:28px 22px;background:#fffdf7;box-shadow:0 24px 70px #241b695c;display:flex;flex-direction:column;align-items:stretch;gap:13px}.lock-moon{align-self:center;width:92px;height:92px;border-radius:50%;display:grid;place-items:center;background:var(--yellow);color:#6d55dd;font-size:62px;line-height:1;box-shadow:0 0 0 13px #ffd76536}.lock-card h2{margin:6px 0 0;font-size:clamp(21px,6.6vw,38px);line-height:1.2;white-space:nowrap}.lock-card>p:not(.form-error){margin:0;color:var(--muted);font-weight:700}.lock-card label{margin-top:6px;font-size:13px;color:var(--purple-dark);font-weight:900}.lock-card .primary-button{width:100%;min-width:0;margin-top:2px}
.success-overlay{position:fixed;inset:0;z-index:1000;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:calc(24px + env(safe-area-inset-top)) 22px calc(28px + env(safe-area-inset-bottom));overflow:hidden;background:radial-gradient(circle at 50% 38%,#fff1a8 0 19%,#ffd765 19.5% 34%,#7157ea 34.5% 100%);opacity:0;visibility:hidden;transform:scale(.94);transition:opacity .18s ease,transform .22s ease,visibility 0s linear .22s;text-align:center}.success-overlay.active{opacity:1;visibility:visible;transform:scale(1);transition-delay:0s}.success-overlay img{position:relative;z-index:2;width:min(76vw,520px);height:min(57vh,520px);object-fit:contain;filter:drop-shadow(0 20px 20px #39267b44);animation:success-pop .42s cubic-bezier(.2,1.4,.45,1)}.success-overlay strong{position:relative;z-index:2;color:#fff;font-size:clamp(42px,12vw,92px);line-height:1;font-weight:1000;letter-spacing:.03em;text-shadow:0 7px 0 #5840ca,0 12px 26px #35247755;overflow-wrap:anywhere}.success-overlay>span{position:relative;z-index:2;color:#fff7cf;font-size:clamp(20px,5vw,34px);font-weight:900}.success-burst{position:absolute;width:130vmax;height:130vmax;background:repeating-conic-gradient(from 0deg,#ffffff24 0 8deg,transparent 8deg 18deg);animation:success-spin 8s linear infinite}@keyframes success-pop{from{transform:scale(.35) rotate(-9deg);opacity:0}75%{transform:scale(1.08) rotate(2deg)}}@keyframes success-spin{to{transform:rotate(360deg)}}
.mode-heading{margin-bottom:20px}.mode-list{display:grid;gap:18px;width:100%;min-width:0}.mode-card{width:100%;min-width:0;min-height:172px;border:0;border-radius:28px;padding:22px 18px;display:flex;align-items:center;gap:16px;text-align:left;color:var(--ink);box-shadow:var(--shadow);cursor:pointer}.mode-card.beginner{background:linear-gradient(135deg,#e8e1ff,#f6f2ff)}.mode-card.advanced{background:linear-gradient(135deg,#dff5ec,#f1fbf7)}.mode-card.disabled{background:#f0ede7;box-shadow:none;cursor:default;opacity:.84}.mode-card:focus-visible{outline:4px solid #7157ea55;outline-offset:3px}.mode-badge{width:76px;height:76px;flex:none;border-radius:24px;display:grid;place-items:center;background:#fff;color:var(--purple-dark);font-size:22px;font-weight:1000;box-shadow:0 8px 22px #493f6f1c}.mode-copy{display:block;min-width:0;flex:1}.mode-copy strong{display:block;font-size:clamp(22px,6vw,32px);overflow-wrap:anywhere}.mode-description{display:block;margin-top:7px;color:var(--ink);font-weight:800}.mode-copy small{display:block;margin-top:9px;color:var(--muted);font-weight:700}.mode-status{display:block;margin-top:7px;color:var(--purple-dark);font-size:13px;font-weight:900}.mode-card.disabled .mode-status{color:#827d73}.mode-arrow{flex:none;font-size:28px;color:var(--purple-dark)}.success-overlay.advanced img{height:min(42vh,390px)}.success-overlay.advanced .success-sentence{font-size:clamp(25px,7vw,48px);line-height:1.15;max-width:760px;text-transform:none;letter-spacing:0;text-shadow:0 5px 0 #5840ca,0 10px 22px #35247755}.success-overlay.advanced #success-word{font-size:clamp(16px,4vw,25px);line-height:1.2;padding:7px 13px;border-radius:99px;background:#ffffff2b;text-shadow:none}.success-overlay.advanced #success-zh{font-size:clamp(16px,4vw,24px)}
@media(min-width:700px){.app-shell{min-height:calc(100dvh - 36px);margin:18px auto;border-radius:32px;box-shadow:0 20px 70px #3b335733}.screen{min-height:calc(100dvh - 36px)}.card-grid{gap:22px;max-width:650px;width:100%;align-self:center}.quiz-screen .prompt-wrap{margin-top:28px}.topic-list,.topic-load-state,.topic-retry{max-width:650px;width:100%;align-self:center}.topic-card{max-width:650px;align-self:center}.coming-card{max-width:650px;width:100%;align-self:center}.stats-grid,.settings-card,.update-card,.danger-button{width:100%;max-width:650px;align-self:center}}@media(max-height:700px){.prompt-wrap{margin:8px 0}.word-card{min-height:125px}.word-card img{height:100px}.card-grid{gap:10px}.hero-art{width:90px;height:90px}.hero-orbit{width:102px;height:54px;top:18px}.hero-star{width:49px;height:49px;left:21px;top:20px;font-size:27px}}
.legal-links{display:flex;justify-content:center;gap:10px;width:100%;margin-top:14px}.legal-links a{flex:1;max-width:200px;padding:12px 10px;border-radius:15px;background:#ece7ff;color:var(--purple-dark);font-weight:900;text-align:center;text-decoration:none}.legal-links a:focus-visible{outline:4px solid #7157ea55;outline-offset:3px}
.purchase-card{display:grid;gap:10px}.purchase-card h3,.purchase-card p{margin:0}.purchase-card small,.delivery-pending-note{color:var(--muted);line-height:1.55}.purchase-price{display:block;color:var(--purple-dark);font-size:22px;font-weight:1000}.purchase-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.paid-topic-card{display:grid;gap:14px}.paid-topic-card p{margin:0;font-weight:900}.paid-topic-card progress{width:100%;height:18px;accent-color:var(--purple)}.paid-topic-actions{display:grid;gap:10px}.purchase-sheet{position:fixed;inset:0;z-index:1200;display:grid;place-items:end center;padding:24px 16px calc(16px + env(safe-area-inset-bottom));background:#211b3a99}.purchase-sheet-card{position:relative;width:min(100%,560px);max-height:calc(100dvh - 40px);overflow:auto;background:var(--cream);border-radius:28px;padding:28px 22px;box-shadow:0 22px 70px #17102d66}.purchase-sheet-card h2{margin:0 0 14px;font-size:30px}.purchase-sheet-card>strong{display:block;font-size:18px}.purchase-sheet-close{position:absolute;right:16px;top:14px;width:42px;height:42px;border:0;border-radius:50%;background:#ece7ff;color:var(--purple-dark);font-size:28px}.purchase-sheet-card .pin-panel{margin-top:14px}.purchase-sheet-card input{width:100%;height:48px;border:2px solid #ddd5ef;border-radius:15px;padding:0 14px;font:inherit}.delivery-pending-note{padding:12px;border-radius:14px;background:#fff4d8;font-size:13px}.topic-card[aria-disabled="true"]{cursor:pointer}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}