@charset "UTF-8";:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:#222824;background:#fafaf8;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--bg:#fafaf8;--surface:#fff;--card:#f2f3f0;--text:#222824;--muted:#626960;--border:#e1e4dd;--accent:#3c5545;--accent-bg:#eaf0e8;--shadow:0 8px 40px #28352305;color-scheme:light}:root[data-theme=dark]{--bg:#181a19;--surface:#202321;--card:#282d29;--text:#f0f2ec;--muted:#b4bcb2;--border:#484e47;--accent:#bdd6ba;--accent-bg:#334435;--shadow:none;color-scheme:dark;background:var(--bg);color:var(--text)}*{box-sizing:border-box}body{margin:0;min-width:280px}button,select{font:inherit;color:inherit}button,select,summary{cursor:pointer;-webkit-tap-highlight-color:transparent}button{min-height:44px;border:1px solid var(--border);border-radius:14px;background:var(--surface);padding:10px 16px;transition:background .16s,opacity .16s;color:var(--text)}button:hover{background:var(--card)}button:active{opacity:.72}button:disabled{opacity:.4;cursor:default}button:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}select{min-height:44px;border:0;border-radius:10px;background:transparent;padding:8px 24px 8px 8px;max-width:100%}h1,h2,h3,p{margin:0}h1{font-size:18px;letter-spacing:.02em;line-height:1.5}h2{font-size:24px;line-height:1.4}svg{flex-shrink:0}.app{max-width:760px;margin:28px auto;background:var(--surface);padding:28px 32px 20px;border:1px solid var(--border);border-radius:28px;box-shadow:var(--shadow)}.header{display:flex;justify-content:space-between;align-items:center;gap:12px}.brand{display:flex;align-items:center;gap:12px;min-width:0}.brand-mark{display:grid;place-items:center;width:42px;height:42px;flex-shrink:0;border-radius:13px;background:var(--accent-bg);color:var(--accent);font-family:Songti SC,SimSun,serif;font-size:24px}.brand p{font-size:12px;color:var(--muted);margin-top:3px;letter-spacing:.08em}.theme-control{display:flex;align-items:center;color:var(--muted);font-size:12px}.theme-control select{padding-right:4px}.tabs{display:flex;gap:8px;border-bottom:1px solid var(--border);margin:24px 0}.tabs button{flex:1;border:0;border-radius:0;background:transparent;color:var(--muted);padding:14px 2px;position:relative}.tabs button.active{color:var(--text);font-weight:650}.tabs button.active:after{content:"";height:2px;background:var(--accent);position:absolute;bottom:-1px;left:26%;right:26%;border-radius:2px}.section-heading{display:flex;justify-content:space-between;font-size:12px;gap:8px;margin-bottom:12px}.muted{color:var(--muted)}.ranges{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.ranges button{font-size:13px;padding:8px 4px;background:var(--card);border-color:transparent;white-space:nowrap}.ranges button.selected{background:var(--accent-bg);color:var(--accent);border-color:var(--accent);font-weight:650}.study-toolbar{display:flex;align-items:center;gap:8px;margin-top:18px;font-size:13px;color:var(--muted)}.study-toolbar select{padding-left:0}.counter{margin-left:auto;color:var(--text);font-variant-numeric:tabular-nums;white-space:nowrap}.counter span{color:var(--muted)}.position-track{height:3px;background:var(--border);border-radius:10px;overflow:hidden;margin:2px 0 14px}.position-track span,.master-track span{display:block;height:100%;background:var(--accent);border-radius:10px;transition:width .2s}.flashcard{width:100%;display:flex;flex-direction:column;min-height:360px;padding:20px 24px;border:0;border-radius:22px;background:var(--card);text-align:center;touch-action:pan-y;position:relative;overflow-wrap:anywhere}.flashcard:hover{background:var(--card)}.card-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;width:100%;text-align:left;font-size:11px;color:var(--muted);line-height:1.6}.status{white-space:nowrap;font-size:11px}.status.mastered{color:var(--accent)}.status.review{color:var(--text)}.card-body{display:flex;flex:1;align-items:center;justify-content:center;flex-direction:column;width:100%;padding:34px 0;animation:appear .18s ease-out}.prompt{font-size:clamp(28px,5.5vw,40px);font-weight:700;line-height:1.55;letter-spacing:.04em;max-width:100%}.prompt.english{font-size:clamp(21px,4.5vw,29px);letter-spacing:0;line-height:1.5;font-weight:600;max-width:570px}.card-hint{font-size:13px;color:var(--muted);margin-top:18px}.answer{font-size:24px;line-height:1.7;margin-top:22px;max-width:570px;animation:appear .18s ease-out}.answer.english{font-size:19px;line-height:1.65;letter-spacing:0}.reveal-label{border:1px solid var(--border);border-radius:30px;margin-top:26px;font-size:12px;padding:11px 16px;background:var(--surface);line-height:20px}.reveal-label span{margin-left:10px;color:var(--muted)}.card-footer{display:flex;justify-content:space-between;gap:8px;font-size:11px;color:var(--muted);width:100%}.navigation{display:flex;align-items:center;justify-content:space-between;margin:16px 0;gap:8px}.navigation button{display:flex;align-items:center;gap:3px;border-radius:30px;padding:8px 12px;font-size:13px}.navigation>span{font-size:11px;color:var(--muted)}.assessment{display:grid;grid-template-columns:1fr 1fr;gap:10px}.assessment button{display:flex;align-items:center;justify-content:center;gap:9px;min-height:58px;font-size:14px}.review-button{background:var(--card);border-color:transparent}.review-button.marked{border-color:var(--muted)}.master-button{background:var(--accent-bg);color:var(--accent);border-color:transparent}.master-button.marked{border-color:var(--accent);font-weight:650}.study-summary{display:flex;align-items:center;justify-content:space-between;margin-top:12px;font-size:12px;color:var(--muted);gap:8px}.study-summary strong{color:var(--text);font-weight:500;margin-left:6px}.text-button{display:flex;align-items:center;gap:6px;border:0;background:transparent;font-size:12px;padding:8px}.text-button svg{width:16px;height:16px}.footer{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px;font-size:11px;color:var(--muted);border-top:1px solid var(--border);margin-top:20px;padding-top:18px;line-height:1.8}.connection-dot{width:5px;height:5px;background:var(--muted);border-radius:100%}.connection-dot.ready{background:var(--accent)}.footer details{width:100%;text-align:center}.footer summary{padding:7px;min-height:34px}.footer details p{max-width:440px;margin:0 auto;text-align:left;padding:8px 14px;font-size:12px;line-height:1.8}.panel{padding-top:4px}.panel-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;gap:12px}.panel-heading svg{width:28px;height:28px;color:var(--accent)}.panel-heading h2 span{font-size:16px;color:var(--muted);margin-left:8px}.eyebrow{font-size:12px;color:var(--muted);margin-bottom:9px}.panel>p{font-size:13px;line-height:1.8;margin-bottom:18px}.primary{background:var(--accent);color:var(--surface);border:0;border-radius:12px;padding:12px 18px}.primary:hover{opacity:.9;background:var(--accent)}.term-list{margin-top:20px;display:grid;gap:8px}.term-list button{width:100%;display:flex;text-align:left;align-items:center;gap:14px;padding:16px;background:var(--card);border:0}.list-number{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.term-list strong{font-size:15px;font-weight:600}.term-list small{display:block;font-size:11px;color:var(--muted);margin-top:6px}.term-list svg{margin-left:auto;color:var(--muted)}.empty{padding:50px 20px;text-align:center;background:var(--card);border-radius:20px}.empty>svg{width:32px;height:32px;color:var(--accent);margin-bottom:16px}.empty p{font-size:14px;color:var(--muted);line-height:1.8;margin:16px 0 24px}.big-stat{text-align:center;padding:24px 0}.big-stat strong{font-size:68px;font-weight:650;letter-spacing:-.06em;color:var(--accent)}.big-stat strong span{font-size:25px;letter-spacing:0;margin-left:3px}.big-stat p{color:var(--muted);font-size:13px;margin-top:6px}.master-track{height:5px;background:var(--border);border-radius:10px;overflow:hidden}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:24px 0 32px}.stat-grid>div{background:var(--card);border-radius:16px;display:flex;align-items:center;flex-direction:column;padding:18px 8px;gap:8px}.stat-grid strong{font-size:25px}.stat-grid span{font-size:12px;color:var(--muted)}.theme-stats{display:grid;gap:24px}.theme-stats>div>div:first-child{display:flex;justify-content:space-between;font-size:13px;margin-bottom:10px;gap:12px}.theme-stats strong{font-size:12px;white-space:nowrap;font-weight:500;color:var(--muted)}.reset{width:100%;margin-top:36px;font-size:13px;color:var(--muted)}.notice{background:var(--card);padding:14px;font-size:13px;line-height:1.7;margin-bottom:16px;border:1px solid var(--border);border-radius:12px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}@keyframes appear{0%{opacity:.5;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@media(max-width:600px){.app{margin:0;min-height:100vh;min-height:100svh;border:0;border-radius:0;padding:calc(20px + env(safe-area-inset-top)) 20px calc(16px + env(safe-area-inset-bottom));box-shadow:none}.header{gap:6px}.brand{gap:9px}.brand-mark{width:36px;height:36px;font-size:21px;border-radius:10px}h1{font-size:16px}.brand p{font-size:10px}.theme-control svg{display:none}.theme-control select{font-size:11px;width:76px;padding:4px 0}.tabs{margin:22px 0}.flashcard{min-height:350px;min-height:clamp(320px,44svh,480px);padding:18px}.prompt{font-size:32px}.answer.english{font-size:18px}.card-body{padding:34px 0}.card-meta{font-size:10px;align-items:flex-start}.card-footer{font-size:10px}.ranges{gap:6px}.ranges button{font-size:12px}.section-heading .muted,.study-summary{font-size:11px}.assessment button{min-height:56px}}@media(max-width:350px){.app{padding-left:14px;padding-right:14px}.brand-mark{display:none}.ranges button{font-size:11px}.flashcard{padding:16px}.navigation>span{font-size:10px}.prompt{font-size:28px}.card-footer span{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.footer summary{min-height:44px}select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='m3 4 3 3 3-3' fill='none' stroke='%23626960' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 5px center;padding-right:23px!important}:root[data-theme=dark] select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='m3 4 3 3 3-3' fill='none' stroke='%23b4bcb2' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E")}.settings-content{display:grid;gap:20px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--border);padding-bottom:12px;font-size:.875rem}.setting-row select{background-color:var(--card);min-width:140px;padding-left:14px}.setting-row select:disabled{opacity:1;cursor:default;background-image:none}.settings-content .range-section{padding:4px 0 10px}.start-area{margin-top:4px}.start-area p{font-size:.75rem;color:var(--muted);line-height:1.6;margin-bottom:12px}.start-button{width:100%;display:flex;justify-content:center;align-items:center;gap:8px;min-height:52px;font-size:.9375rem}.settings-content .study-summary{margin-top:0}html[data-page=recite],html[data-page=recite] body{height:100%;overflow:hidden;overscroll-behavior:none}.app.recite-page{width:100%;height:100vh;height:100dvh;max-height:var(--visual-height,100dvh);min-height:0;margin:0 auto;border:0;border-radius:0;box-shadow:none;overflow:hidden;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:12px;padding:max(12px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) max(12px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}.recite-header{min-width:0}.recite-topline{display:flex;align-items:center;justify-content:space-between;gap:12px}.back-button{display:flex;align-items:center;gap:4px;border:0;background:transparent;padding:8px 4px;font-size:.875rem}.recite-topline .counter{font-size:.875rem}.recite-header .position-track{margin:4px 0 0}.recite-page .flashcard{display:flex;flex-direction:column;min-height:0;min-width:0;overflow:hidden;padding:16px;border-radius:22px;background:var(--card);text-align:center;border:0}.recite-page .card-meta{flex:none;font-size:.6875rem;padding-bottom:8px;gap:12px}.recite-page .status{font-size:inherit}.card-scroll{flex:1;min-height:0;min-width:0;width:100%;overflow:auto;overscroll-behavior:contain;touch-action:pan-y pinch-zoom;-webkit-overflow-scrolling:touch;scrollbar-width:thin;cursor:pointer;overflow-wrap:anywhere;border-radius:8px}.card-scroll:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.recite-page .card-body{min-height:100%;width:100%;height:auto;flex:none;padding:16px 4px;justify-content:center;animation:appear .18s ease-out}.recite-page .prompt,.recite-page .answer,.recite-page .card-hint{flex-shrink:0}.recite-page .prompt{font-size:clamp(1.75rem,5.5vw,2.5rem);line-height:1.45;letter-spacing:.035em}.recite-page .prompt.english{font-size:clamp(1.125rem,4.4vw,1.625rem);line-height:1.45;letter-spacing:0}.recite-page .answer{font-size:1.5rem;line-height:1.5;margin-top:16px}.recite-page .answer.english{font-size:1.125rem;line-height:1.5}.recite-page .long-text .prompt.english{font-size:clamp(1.0625rem,4vw,1.375rem)}.recite-page .long-text .answer.english{font-size:1.0625rem}.recite-page .card-hint{font-size:.8125rem;margin-top:16px;line-height:1.5}.recite-controls{display:grid;gap:8px;min-width:0}.recite-controls .navigation{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr) minmax(0,1fr);gap:8px;margin:0;align-items:stretch}.recite-controls .navigation button{justify-content:center;min-height:44px;font-size:.8125rem;line-height:1.35;padding:8px 4px;white-space:normal;overflow-wrap:anywhere}.recite-controls .navigation svg{width:16px;height:16px}.recite-controls .answer-toggle{background:var(--card);border-color:transparent}.recite-controls .assessment{gap:8px}.recite-controls .assessment button{min-height:50px;font-size:.875rem;line-height:1.35;padding:10px 8px}.recite-warning{font-size:.75rem;color:var(--muted);line-height:1.4}.recite-empty{min-height:0;overflow:auto;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px}@media(max-height:550px){.app.recite-page{gap:8px;padding-top:max(8px,env(safe-area-inset-top));padding-bottom:max(8px,env(safe-area-inset-bottom))}.recite-page .flashcard{padding:12px}.recite-page .card-body{padding:8px 2px}.recite-page .prompt{font-size:1.625rem;line-height:1.35}.recite-page .prompt.english,.recite-page .long-text .prompt.english{font-size:1.0625rem;line-height:1.4}.recite-page .answer{font-size:1.25rem;margin-top:10px}.recite-page .answer.english,.recite-page .long-text .answer.english{font-size:1rem;line-height:1.4}.recite-page .card-hint{margin-top:10px}.recite-controls .assessment button{min-height:44px}}@media(max-height:420px){.recite-page .card-meta{display:none}}html[data-page=recite][data-space-limited=true],html[data-page=recite][data-space-limited=true] body{height:auto;overflow:auto;overscroll-behavior:auto}html[data-space-limited=true] .app.recite-page{height:auto;min-height:100dvh;max-height:none;overflow:visible;grid-template-rows:auto minmax(12rem,auto) auto}html[data-space-limited=true] .recite-page .flashcard{min-height:12rem}.recite-page .explanation{display:block;flex-shrink:0;width:100%;max-width:570px;margin-top:12px;font-size:.9375rem;line-height:1.65;color:var(--muted);text-align:left;overflow-wrap:anywhere;white-space:normal}.recite-page .answer:not(.english){font-weight:650;font-size:clamp(1.75rem,5.5vw,2.5rem);line-height:1.45}@media(max-height:550px){.recite-page .explanation{font-size:.875rem;line-height:1.5;margin-top:10px}.recite-page .answer:not(.english){font-size:1.625rem}}.app[data-library=history]{--bg:#F6F8F5;--surface:#FFFFFF;--card:#E9EFE8;--accent:#486B5B;--accent-bg:#E9EFE8;--library-color:#486B5B;--text:#222824;--muted:#59685D;--border:#CBD8CE}.app[data-library=philosophy]{--bg:#F8F7FB;--surface:#FFFFFF;--card:#ECEAF4;--accent:#71618E;--accent-bg:#ECEAF4;--library-color:#71618E;--text:#2B2735;--muted:#655D74;--border:#D2CBDD}.app[data-library=arts]{--bg:#FCF7F3;--surface:#FFFFFF;--card:#F7ECE3;--accent:#965737;--accent-bg:#F7ECE3;--library-color:#B67653;--text:#332820;--muted:#76604F;--border:#E0CDBD}:root[data-theme=dark] .app[data-library=history]{--bg:#18211D;--surface:#1E2923;--card:#28372D;--accent:#B8D3BD;--accent-bg:#304737;--library-color:#B8D3BD;--text:#EFF4EE;--muted:#BCCBC0;--border:#526858}:root[data-theme=dark] .app[data-library=philosophy]{--bg:#201D27;--surface:#272330;--card:#342E40;--accent:#CEBEE6;--accent-bg:#443852;--library-color:#CEBEE6;--text:#F3EFF7;--muted:#C6BFD2;--border:#675A79}:root[data-theme=dark] .app[data-library=arts]{--bg:#261F1B;--surface:#2E251F;--card:#3D2F25;--accent:#E8BE9C;--accent-bg:#513C2C;--library-color:#E8BE9C;--text:#F8F0E9;--muted:#D6C1B4;--border:#785C48}.app{color:var(--text);background:var(--surface)}.app.recite-page{background:var(--bg)}.app .position-track span,.app .master-track span{background:var(--library-color)}.setting-row select#library{color:var(--accent);background-color:var(--accent-bg);font-weight:600}.favorite-button{background:var(--card);border-color:transparent;color:var(--text)}.favorite-button.marked{border-color:var(--accent);color:var(--accent);background:var(--accent-bg);font-weight:600}.favorite-button.marked svg,.favorite-remove svg{fill:currentColor;fill-opacity:.14}.favorite-filters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:16px 0}.favorite-filters button{font-size:.75rem;padding:8px 4px;background:var(--card);border-color:transparent}.favorite-filters .selected{border-color:var(--accent);color:var(--accent);font-weight:600}.favorite-row{display:flex;align-items:stretch;gap:8px;border:1px solid var(--border);border-radius:14px;overflow:hidden}.favorite-row[data-library=history]{--marker:#486B5B;--marker-text:#486B5B}.favorite-row[data-library=philosophy]{--marker:#71618E;--marker-text:#71618E}.favorite-row[data-library=arts]{--marker:#B67653;--marker-text:#965737}:root[data-theme=dark] .favorite-row[data-library=history]{--marker:#B8D3BD;--marker-text:#B8D3BD}:root[data-theme=dark] .favorite-row[data-library=philosophy]{--marker:#CEBEE6;--marker-text:#CEBEE6}:root[data-theme=dark] .favorite-row[data-library=arts]{--marker:#E8BE9C;--marker-text:#E8BE9C}.term-list .favorite-row button{background:transparent;width:auto;border-radius:0;padding:14px 10px}.term-list .favorite-open{flex:1;min-width:0;gap:10px}.favorite-open>span:not(.library-dot){min-width:0;overflow-wrap:anywhere}.library-dot{width:7px;height:28px;flex-shrink:0;border-radius:4px;background:var(--marker)}.term-list .library-label{color:var(--marker-text)}.term-list .favorite-remove{flex-shrink:0;color:var(--muted);display:flex;flex-direction:column;justify-content:center;gap:6px;font-size:.625rem;border-left:1px solid var(--border)}.term-list .favorite-remove svg{margin:0}@media(max-width:600px){.settings-content .ranges{grid-template-columns:repeat(3,minmax(0,1fr))!important}}.vocabulary-notes{flex-shrink:0;width:100%;max-width:570px;margin-top:16px;padding-top:12px;border-top:1px solid var(--border);text-align:left;color:var(--muted);font-size:1rem;line-height:1.55}.vocabulary-notes h3{font-size:.75rem;font-weight:500;letter-spacing:.04em;margin:0 0 8px;color:var(--accent)}.vocabulary-notes ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}.vocabulary-notes li{overflow-wrap:anywhere}.vocabulary-word{font-weight:600;color:var(--text)}.vocabulary-pos{font-size:.875rem}.backup-controls{margin-top:28px;padding-top:20px;border-top:1px solid var(--border)}.backup-controls h3{font-size:1rem;margin-bottom:10px}.backup-controls p{font-size:.875rem;line-height:1.6;margin:10px 0}.backup-controls>div{display:grid;grid-template-columns:1fr 1fr;gap:12px}.cloze-entry{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px;background:var(--card);border-color:transparent;text-align:left}.cloze-entry strong{font-size:.9375rem;font-weight:650}.cloze-entry small{display:block;color:var(--muted);font-size:.75rem;margin-top:5px}.app.cloze-host{max-width:none;padding:0;margin:0;border:0;border-radius:0;min-height:0;background:transparent;box-shadow:none}.backup-snapshot{margin-top:16px;line-height:1.6}.backup-snapshot summary{min-height:44px;padding:10px 0;cursor:pointer}.backup-snapshot>div{display:grid;grid-template-columns:1fr 1fr;gap:10px}.update-notice button{margin:8px 0}