:root{color:#202d39;font-synthesis:none;text-rendering:optimizelegibility;--ink:#202d39;--muted:#77818a;--line:#e7e6df;--paper:#fffefa;--green:#20775c;--green-dark:#175e48;--soft-green:#e7f1ec;--gold:#b48745;background:#f2f0e9;font-family:DM Sans,Noto Serif SC,PingFang SC,-apple-system,BlinkMacSystemFont,sans-serif}*{box-sizing:border-box}body{background:#f2f0e9;min-width:320px;min-height:100vh;margin:0}button,input,select{font:inherit}button{color:inherit}#app{min-height:100vh}.topbar{background:var(--paper);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;height:72px;padding:0 34px;display:none}.brand{color:inherit;align-items:center;gap:11px;text-decoration:none;display:flex}.brand-mark{color:#fff;background:var(--green);border-radius:10px 10px 10px 3px;place-items:center;width:34px;height:34px;font-family:Georgia,serif;font-size:22px;font-weight:700;display:grid}.brand strong{letter-spacing:.13em;font-size:13px;line-height:1.15;display:block}.brand small{color:#98a09e;letter-spacing:.16em;margin-top:4px;font-size:8px;display:block}.edition{color:#65736e;align-items:center;gap:8px;font-size:12px;display:flex}.edition-dot{background:#51a480;border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 3px #e6f2eb}.icon-button{border:1px solid var(--line);color:#76807d;cursor:pointer;background:0 0;border-radius:50%;width:36px;height:36px}.icon-button:hover{color:var(--green);border-color:#bad1c7}.workspace{grid-template-columns:minmax(0,1fr) 356px;gap:22px;width:min(1440px,100%);min-height:100vh;margin:0 auto;padding:16px 28px 36px;display:grid}.reader-column{min-width:0}.reader-toolbar{border:1px solid var(--line);background:var(--paper);border-radius:12px;flex-wrap:wrap;justify-content:flex-start;align-items:center;gap:8px 12px;min-height:56px;margin-top:10px;padding:8px 12px;display:flex;box-shadow:0 4px 16px #263b2f08}.toolbar-group{align-items:center;gap:8px;display:flex}.toolbar-button{color:#52605d;cursor:pointer;background:#fff;border:1px solid #e8e9e3;border-radius:8px;place-items:center;width:32px;height:32px;font-size:18px;display:grid}.toolbar-button:hover{color:var(--green);border-color:#b8d1c4}.zoom-fit-button{color:#7d8782;cursor:pointer;white-space:nowrap;background:0 0;border:0;border-radius:5px;min-width:58px;padding:4px 5px;font-size:10px}.zoom-fit-button:hover{color:var(--green-dark);background:#eff6f1}.study-tools-toggle,.study-sheet-header,.study-tools-backdrop{display:none}.page-jump{color:#828b88;white-space:nowrap;align-items:center;gap:5px;font-size:11px;display:inline-flex}.page-jump input{text-align:center;width:42px;color:var(--ink);border:0;border-bottom:1px solid #d9ded8;border-radius:0;outline:none;padding:5px 3px;font-weight:700}.page-jump input:focus{border-color:var(--green)}.unit-select-label{color:#8b9490;white-space:nowrap;align-items:center;gap:8px;font-size:11px;display:flex}.unit-select-label select{color:#485650;background:#fff;border:1px solid #e8e9e3;border-radius:8px;width:min(220px,24vw);height:34px;padding:0 10px;font-size:12px}.zoom-controls{gap:7px}#zoom-label{text-align:center;color:#7d8782;min-width:58px;font-size:10px}.status-banner{color:#65726e;border-radius:7px;align-items:center;min-height:32px;margin:10px 2px 0;padding:6px 10px;font-size:11px;display:flex}.status-banner[hidden]{display:none}.status-banner.success{color:#2c765d;background:#e9f3ed}.status-banner.error{color:#a3473a;background:#faebe7}.status-banner.info{color:#6c7771;background:#ecefe9}.page-stage{background:#e8e6dd;border:1px solid #e4e2d8;border-radius:13px;justify-content:center;align-items:flex-start;min-height:calc(100vh - 207px);padding:15px;display:flex;overflow:auto}.page-wrap{touch-action:pan-y pinch-zoom;overscroll-behavior-x:contain;background:#fff;flex:none;position:relative;box-shadow:0 12px 36px #29342d26}#pdf-canvas{max-width:none;display:block}.interaction-layer{pointer-events:none;position:absolute;inset:0}.hotspot{pointer-events:auto;cursor:pointer;background:0 0;border:0;border-radius:3px;min-width:2px;min-height:2px;padding:0;display:block;position:absolute}.word-hotspot:hover{background:#86c9a750;box-shadow:0 0 0 1px #28856385}.paragraph-hotspot:hover,.paragraph-hotspot.selected{background:#eac36b24;box-shadow:0 0 0 1px #b484396e}.paragraph-hotspot.selected{background:#eac36b38}.sentence-highlight{z-index:1;pointer-events:none;background:#eac36b5c;border-radius:3px;position:absolute;box-shadow:0 0 0 1px #b4843980}.word-highlight{z-index:2;pointer-events:none;background:#f0bd4a88;border-radius:3px;position:absolute;box-shadow:0 0 0 2px #ad7420}.reader-meta{color:#7e8983;white-space:nowrap;font-size:10px}.study-column{flex-direction:column;gap:13px;display:flex}.study-sheet-header{display:none}.study-sheet-close{border:1px solid var(--line);color:#66756d;cursor:pointer;background:#fff;border-radius:50%;width:34px;height:34px;font-size:22px;line-height:1}.mode-card,.word-card,.vocabulary-card,.audio-card,.settings-card{border:1px solid var(--line);background:var(--paper);border-radius:13px;padding:17px 17px 16px;box-shadow:0 4px 16px #263b2f08}.section-eyebrow{color:#a0a8a2;letter-spacing:.16em;font-size:9px;font-weight:700}.mode-switch{background:#f0f1ec;border-radius:8px;grid-template-columns:1fr 1fr;gap:3px;margin-top:11px;padding:3px;display:grid}.mode-button{color:#84908a;cursor:pointer;background:0 0;border:0;border-radius:6px;min-height:32px;font-size:11px}.mode-button.active{color:var(--green-dark);background:#fff;font-weight:700;box-shadow:0 1px 4px #203f3018}.quiet-copy{color:#929b95;margin:10px 0 0;font-size:10px;line-height:1.65}.word-card{min-height:204px}.hover-word-popup{z-index:30;background:var(--paper);border:1px solid #d9e1d9;border-radius:12px;width:min(340px,100vw - 24px);max-height:min(72vh,560px);padding:14px 15px;position:fixed;overflow:auto;box-shadow:0 12px 38px #14291f38}.hover-word-popup[hidden]{display:none}.hover-word-popup .word-heading{margin-top:0}.hover-word-popup .word-heading h2{font-size:21px}.hover-word-popup .example-box{margin-top:9px}.hover-play-hint{color:#9a7541;margin:8px 0 0;font-size:10px;line-height:1.5}.vocabulary-card-heading,.vocabulary-dialog-heading{justify-content:space-between;align-items:center;gap:10px;display:flex}.vocabulary-card-heading h2,.vocabulary-dialog-heading h2{color:#35443d;margin:4px 0 0;font-size:15px;font-weight:600}.vocabulary-card-actions{align-items:center;gap:7px;display:flex}.vocabulary-link-button,.vocabulary-export-button,.vocabulary-add-button{color:var(--green-dark);cursor:pointer;background:#eff6f1;border:1px solid #dce8df;border-radius:7px;padding:7px 10px;font-size:10px;font-weight:700}.vocabulary-link-button:hover,.vocabulary-export-button:hover:not(:disabled),.vocabulary-add-button:hover:not(:disabled){background:#e5f1e9;border-color:#b8d1c4}.vocabulary-add-button{margin-top:13px}.vocabulary-add-button:disabled,.vocabulary-export-button:disabled{color:#9aa29d;cursor:default;background:#f1f1ed;border-color:#e7e9e2}.vocabulary-empty{color:#929b95;margin:12px 0 0;font-size:10px;line-height:1.65}.vocabulary-list{gap:9px;max-height:390px;margin:12px 0 0;padding:0 3px 0 0;list-style:none;display:grid;overflow-y:auto}.vocabulary-item{background:#fff;border:1px solid #ebe9df;border-radius:9px;overflow:hidden}.word-details{min-width:0}.pronunciation-source{color:#63816f;background:#edf4ef;border-radius:5px;margin-top:7px;padding:3px 7px;font-size:9px;display:inline-block}.pronunciation-source.textbook{color:#8c6b37;background:#f7f0df}.review-badge{color:#98734a;background:#fbf2df;border-radius:5px;margin:7px 0 0 6px;padding:3px 7px;font-size:9px;display:inline-block}.vocabulary-item .word-details{padding:11px 12px 0}.vocabulary-item .word-heading{margin-top:0}.vocabulary-item .word-heading h2{font-size:18px}.vocabulary-item .word-meta{flex-wrap:wrap}.vocabulary-item .translation{font-size:12px}.vocabulary-item .example-box{margin-top:9px;padding:9px}.vocabulary-item-actions{justify-content:flex-end;padding:4px 10px 9px;display:flex}.vocabulary-remove-button,.dialog-close-button{color:#8c6c5f;cursor:pointer;background:#fffefa;border:1px solid #ece9df;border-radius:6px;padding:5px 8px;font-size:10px}.vocabulary-remove-button:hover{color:#9c493b;background:#fbf1ed;border-color:#e2c4b7}.vocabulary-pages{color:#72847a;margin:0;padding:0 12px 11px;font-size:10px}.vocabulary-dialog{border:1px solid var(--line);width:min(760px,100vw - 28px);max-height:min(88vh,900px);color:var(--ink);background:var(--paper);border-radius:14px;padding:20px;overflow:hidden;box-shadow:0 18px 60px #152c2240}.vocabulary-dialog::backdrop{background:#18292080}.dialog-close-button{color:#77818a;width:31px;height:31px;font-size:19px;line-height:1}.book-vocabulary-list{max-height:min(62vh,640px)}.vocabulary-dialog-footer{border-top:1px solid var(--line);color:#929b95;justify-content:space-between;align-items:center;gap:12px;margin-top:15px;padding-top:12px;font-size:10px;display:flex}.vocabulary-export-button{padding:8px 12px}.sentence-section-heading{justify-content:space-between;align-items:center;gap:8px;min-height:30px;display:flex}.sentence-list-heading{justify-content:space-between;align-items:center;gap:8px;margin-top:13px;display:flex}.sentence-list-heading h2{color:#233c34;margin:0;font-family:Georgia,Noto Serif SC,serif;font-size:18px;font-weight:600}.sentence-speed-controls{color:#969f99;flex:none;align-items:center;gap:5px;margin-top:0;font-size:9px;display:flex}.sentence-controls{flex-direction:column;align-items:flex-start;gap:8px;margin-top:10px;display:flex}.playback-control-row,.audio-control-row{flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:8px;width:100%;min-width:0;display:flex}.repeat-control{color:#718077;white-space:nowrap;flex:none;align-items:center;gap:6px;font-size:10px;display:inline-flex}.repeat-control>span[aria-hidden=true]{font-size:16px;line-height:1}.repeat-control select{max-width:110px;color:var(--green-dark);font:inherit;background:#fff;border:1px solid #dbe7df;border-radius:6px;padding:5px 7px}.sentence-pause{width:30px;height:30px;color:var(--green-dark);cursor:pointer;background:#eff6f1;border:1px solid #dbe7df;border-radius:6px;place-items:center;margin-top:0;padding:0;font-size:13px;display:grid}.sentence-pause:disabled{opacity:.5;cursor:default}.sentence-speed-controls>span{margin-right:2px}.sentence-rate-button{color:#7d8981;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:5px;padding:4px 8px;font-size:9px}.sentence-rate-button.active{color:var(--green-dark);background:#eff6f1;border-color:#dbe7df;font-weight:700}.sentence-back{color:#718077;cursor:pointer;background:#fff;border:1px solid #e7e9e2;border-radius:6px;place-items:center;width:30px;height:30px;padding:0;font-size:17px;display:grid}.sentence-back:hover{color:var(--green-dark);border-color:#bdd2c4}.sentence-list{gap:6px;max-height:440px;margin:12px 0 0;padding:0 3px 0 0;list-style:none;display:grid;overflow-y:auto}.sentence-row{text-align:left;cursor:pointer;background:#fff;border:1px solid #ebe9df;border-radius:8px;justify-content:space-between;align-items:flex-start;gap:10px;width:100%;padding:9px 10px;display:flex}.sentence-row.playing{background:#fbf7ea;border-color:#d8c28f}@media (hover:hover) and (pointer:fine){.sentence-list:not(:has(.sentence-row.playing)) .sentence-row:hover:not(:disabled){background:#fbf7ea;border-color:#d8c28f}}.sentence-row:disabled{color:#a0a59e;cursor:not-allowed;background:#f6f5f0}.sentence-row-copy{gap:3px;min-width:0;display:grid}.sentence-row-text{color:#43544b;font-family:Georgia,serif;font-size:12px;line-height:1.5}.sentence-word{touch-action:manipulation}.sentence-word:hover{text-underline-offset:2px;-webkit-text-decoration:underline #b99442;text-decoration:underline #b99442}.sentence-word.current-word{color:#273b32;background:#f0bd4a88;border-radius:2px;box-shadow:0 0 0 2px #ad7420}.sentence-row-translation{color:#87918b;font-size:10px;line-height:1.5}.sentence-row-translation.pending{color:#9a7541}.sentence-row-action{color:#7a927f;white-space:nowrap;flex:none;padding-top:2px;font-size:9px}.sentence-speaker-icon{fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8px;width:15px;height:15px;display:block}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.sentence-row:disabled .sentence-row-action{color:#a6a69d}.empty-state{text-align:center;flex-direction:column;align-items:center;gap:7px;padding:25px 6px 8px;display:flex}.empty-icon{color:#47836c;background:#eaf3ed;border-radius:12px;place-items:center;width:38px;height:38px;margin-bottom:2px;font-family:Georgia,serif;font-size:20px;display:grid}.empty-state strong{color:#53615b;font-size:12px}.empty-state span:last-child{color:#9aa29d;font-size:9px}.word-heading{justify-content:space-between;align-items:center;gap:10px;margin-top:15px;display:flex}.word-heading h2{color:#233c34;margin:0 0 4px;font-family:Georgia,Noto Serif SC,serif;font-size:25px;font-weight:600}.ipa{color:#88938d;font-family:DM Sans,sans-serif;font-size:11px}.play-round,.example-play{color:#fff;background:var(--green);cursor:pointer;border:0;border-radius:50%;flex:none;place-items:center;display:grid}.play-round{width:35px;height:35px;font-size:12px}.play-round:hover,.example-play:hover{background:var(--green-dark)}.word-meta{gap:7px;margin-top:11px;display:flex}.word-meta span{color:#62816f;background:#edf4ef;border-radius:5px;padding:4px 8px;font-size:9px}.translation{color:#3b5148;margin:10px 0 0;font-size:13px;line-height:1.55}.example-box{background:#fbfaf5;border:1px solid #ebe9df;border-radius:9px;margin-top:13px;padding:11px}.example-line{align-items:center;gap:8px;display:flex}.example-line p{color:#44544c;flex:1;margin:0;font-family:Georgia,serif;font-size:12px;line-height:1.5}.example-play{width:25px;height:25px;font-size:9px}.example-translation{color:#92978e;margin-top:6px;font-size:10px;line-height:1.55;display:block}.source-note{color:#a0a59e;margin-top:8px;font-size:9px}.missing-entry{color:#98734a;margin:20px 0 0;font-size:11px;line-height:1.7}.audio-heading{justify-content:space-between;align-items:center;display:flex}.audio-heading h2{color:#35443d;margin:0;font-size:15px;font-weight:600}.count-badge{color:#6f8779;background:#edf4ef;border-radius:20px;padding:4px 8px;font-size:9px}#textbook-audio{width:100%;height:37px;margin-top:11px}.audio-control-row{margin-top:7px}.speed-row{color:#969f99;flex:none;align-items:center;gap:5px;margin-top:0;font-size:9px;display:flex}.speed-button{color:#7d8981;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:5px;padding:4px 8px;font-size:9px}.speed-button.active{color:var(--green-dark);background:#eff6f1;border-color:#dbe7df;font-weight:700}.settings-card{padding:13px 15px}.setting-row{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;display:flex}.setting-row strong,.setting-row small{display:block}.setting-row strong{color:#65716a;font-size:10px;font-weight:600}.setting-row small{color:#9aa29d;margin-top:4px;font-size:9px}.setting-row input{width:15px;height:15px;accent-color:var(--green)}.resource-footnote{color:#9ca29d;padding:0 3px;font-size:9px;line-height:1.6}.toast{z-index:20;color:#fff;opacity:0;pointer-events:none;background:#334e42;border-radius:8px;max-width:min(90vw,520px);padding:10px 16px;font-size:12px;transition:all .2s;position:fixed;bottom:24px;left:50%;transform:translate(-50%,10px);box-shadow:0 8px 26px #152c2240}.toast.visible{opacity:1;transform:translate(-50%)}.toast.error{background:#9c493b}@media (width<=1050px){.workspace{grid-template-columns:minmax(0,1fr) 310px;gap:14px;padding:18px 16px 28px}.reader-toolbar{flex-wrap:wrap}.unit-select-label{order:3;width:100%}.unit-select-label select{flex:1;width:auto}}@media (width<=760px){.topbar{height:60px;padding:0 16px}.workspace{flex-direction:column;gap:14px;padding:12px 10px 28px;display:flex}.reader-toolbar{gap:7px;min-height:48px;padding:6px}.toolbar-group{gap:5px}.unit-select-label{flex:1;order:0;width:auto}.unit-select-label>span{display:none}.unit-select-label select{width:100%;min-width:88px}.zoom-controls{margin-left:auto}#zoom-label{min-width:42px;font-size:9px}.page-stage{min-height:54vh;padding:8px}.reader-footer{gap:12px}.study-column{grid-template-columns:1fr 1fr;align-items:start;display:grid}.mode-card,.vocabulary-card,.audio-card{grid-column:1/-1}.word-card{min-height:190px}.settings-card,.resource-footnote{grid-column:1/-1}.edition{white-space:nowrap;text-overflow:ellipsis;max-width:45vw;font-size:10px;overflow:hidden}}@media (width<=470px){.workspace{padding-inline:7px}.page-jump{gap:3px;font-size:9px}.page-jump input{width:34px}.toolbar-button{width:29px;height:29px}.zoom-controls{gap:3px}.unit-select-label select{padding:0 5px;font-size:10px}.study-column{grid-template-columns:1fr}.vocabulary-card-actions{gap:4px}.vocabulary-link-button{padding:6px 7px;font-size:9px}#toggle-page-vocabulary{width:28px;height:28px;padding:0;font-size:15px}.mode-card,.vocabulary-card,.audio-card,.settings-card,.resource-footnote{grid-column:1}.word-card{grid-row:auto}.playback-control-row,.audio-control-row{gap:4px}.sentence-speed-controls{gap:2px}.sentence-rate-button,.speed-button{padding-inline:5px}.repeat-control{gap:4px;font-size:9px}.repeat-control select{max-width:82px;padding-inline:5px}}@media (width<=600px),(height<=500px) and (orientation:landscape){.sentence-word.current-word{color:#273b32;-webkit-box-decoration-break:clone;box-decoration-break:clone;background:#f3c65e;border-radius:4px;padding-inline:2px;font-weight:700;box-shadow:0 0 0 2px #9a6418}}@media (width<=1100px) and (orientation:portrait),(height<=500px) and (orientation:landscape){html,body,#app{width:100%;height:100%;min-height:0}body{overflow:hidden}.workspace{width:100%;height:100dvh;min-height:0;padding:env(safe-area-inset-top) 0 0;display:block;overflow:hidden}.reader-column{grid-template-rows:minmax(0,1fr) auto;gap:0;width:100%;height:100%;min-height:0;display:grid;position:relative}.status-banner:not([hidden]){z-index:5;background:#fffefaed;min-height:0;margin:0;padding:6px 9px;position:absolute;top:8px;left:8px;right:8px;box-shadow:0 2px 10px #263b2f14}.page-stage{overscroll-behavior:contain;background:#e8e6dd;border:0;border-radius:0;justify-content:safe center;align-items:safe center;width:100%;height:100%;min-height:0;padding:8px}.reader-toolbar{z-index:41;width:100%;min-height:0;padding:6px 8px calc(6px + env(safe-area-inset-bottom));border:0;border-top:1px solid var(--line);background:var(--paper);border-radius:0;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"pages zoom tools""unit unit unit";align-items:center;gap:5px 7px;margin:0;display:grid;position:relative;box-shadow:0 -4px 16px #263b2f08}.reader-toolbar>.toolbar-group:first-child{grid-area:pages}.reader-toolbar>.unit-select-label{order:0;grid-area:unit;width:100%;min-width:0}.reader-toolbar>.unit-select-label select{width:100%;min-width:0;height:31px}.reader-toolbar>.zoom-controls{grid-area:zoom;justify-content:center;gap:3px;margin:0}.reader-toolbar>.reader-meta{display:none}.toolbar-group{gap:4px}.toolbar-button{width:31px;height:31px}.page-jump{gap:3px;font-size:10px}.page-jump input{width:36px}#page-total{font-size:9px}.zoom-fit-button{min-width:48px;padding-inline:2px;font-size:9px}.reader-toolbar>.study-tools-toggle{border-radius:9px;grid-area:tools;justify-self:end;width:34px;height:34px;font-size:17px;display:grid}.study-tools-backdrop:not([hidden]){z-index:39;touch-action:manipulation;background:#16251d70;border:0;width:100%;height:100%;padding:0;display:block;position:fixed;inset:0}.study-column{z-index:40;width:100%;max-height:min(82dvh,760px);padding:12px 12px calc(12px + env(safe-area-inset-bottom));border:1px solid var(--line);overscroll-behavior:contain;-webkit-overflow-scrolling:touch;background:#f4f2eb;border-bottom:0;border-radius:18px 18px 0 0;flex-direction:column;gap:10px;margin:0;display:none;position:fixed;inset:auto 0 0;overflow:hidden auto;box-shadow:0 -12px 38px #14291f28}.study-column.mobile-open{display:flex}.study-column>*{flex-shrink:0}.study-column{scroll-padding-block:12px}.study-sheet-header{z-index:2;color:#35443d;background:#f4f2eb;justify-content:space-between;align-items:center;min-height:42px;margin:-12px -2px 0;padding:7px 2px;display:flex;position:sticky;top:-12px}.study-sheet-header strong{font-size:14px}.study-column .mode-card,.study-column .word-card,.study-column .vocabulary-card,.study-column .audio-card,.study-column .settings-card{width:100%}.study-column .resource-footnote{padding:0 3px}.study-column .word-card{min-height:0}.hover-word-popup{z-index:50;max-height:min(65dvh,520px)}}