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@media(max-width:950px){.download-list{right:auto;left:0}}
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.pdf-range small{display:block;margin-top:8px;color:#616d57;font-size:12px;line-height:1.7}
.file-picker{position:relative}.file-picker input[type=file]{width:1px;height:1px;margin:0;padding:0;border:0;clip-path:inset(50%)}
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.page-canvas .ocr-region{position:absolute;min-width:0;min-height:0;padding:0;border:1px solid transparent;border-radius:1px;background:transparent;box-shadow:none;transform:none;transition:background .12s,border-color .12s}.page-canvas .ocr-region:hover,.page-canvas .ocr-region:focus-visible{border-color:#688c4c;background:rgba(147,179,112,.16);outline:2px solid rgba(104,140,76,.25);z-index:1}.translation-pair.has-original>.translation-part-text{min-width:0;border-left:1px solid #e0e5d7;align-self:stretch}.translation-pair.has-original>.translation-part-text{font-size:15px;line-height:1.9}
@media(max-width:760px){.translation-pair.has-original{grid-template-columns:1fr}.translation-pair.has-original>.translation-part-text{border-left:0}.part-originals{padding:14px}.page-canvas{max-width:480px;margin:auto}}
.translation-part>summary:before{content:'⌄';color:#606e54;font-size:16px;transform:rotate(-90deg);transition:transform .15s}.translation-part[open]>summary:before{transform:rotate(0)}.translation-part>summary span{flex:1}.translation-part>summary{gap:12px;padding:16px 20px}.part-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 24px;border-top:1px solid #e3e7da;background:#fffef9}.reading-label{font-size:12px;font-weight:700;letter-spacing:.12em;color:#626c59}.compare-toggle{padding:7px 12px;font-size:12px;background:#f7f9f1;border-color:#dce2d3}.compare-toggle[aria-expanded=true]{background:#edf2e5;color:#405c32;border-color:#a8b99a}.translation-pair.has-original{display:block}.translation-pair>.part-originals{display:none}.translation-pair.has-original>.translation-part-text{border-left:0;font-size:16px}.translation-part-text{padding:30px 40px;background:#fffdf7;white-space:normal;border-top:1px solid #edf0e5}.translation-pair.comparing{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);align-items:start}.translation-pair.comparing>.part-originals{display:block}.translation-pair.comparing>.translation-part-text{padding:26px 28px;border-left:1px solid #e0e5d7}.translation-pair.comparing .translation-document{font-size:15px}.translation-part.done{box-shadow:0 3px 12px rgba(39,53,35,.035)}.translation-part.done>summary{background:#f1f5eb}.translation-part .part-toolbar button:focus-visible{outline:3px solid #536b43;outline-offset:3px}
@media(max-width:760px){.translation-pair.comparing{grid-template-columns:1fr}.translation-pair.comparing>.translation-part-text{border-left:0;padding:22px 18px}.translation-part-text{padding:24px 20px}.part-toolbar{padding:12px 18px}.translation-document{font-size:15px!important}.translation-figures{gap:16px;padding:16px 10px}.translation-part>summary{flex-direction:row;align-items:center;padding:14px 16px}.translation-part>summary span{font-size:12px}.reading-label{font-size:12px;letter-spacing:.05em}.compare-toggle{font-size:12px;padding:7px 9px}}
.study-history{margin:0 0 22px;padding:22px 24px;border:1px solid #d9dfd1;border-radius:14px;background:linear-gradient(135deg,#f5f7ef,#fffdf8);box-shadow:0 8px 24px rgba(38,52,35,.05)}.history-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:14px}.history-head h2{margin:0;font:600 20px/1.35 'Noto Serif',serif}.history-head .eyebrow{margin:0 0 3px}.history-head>small{max-width:430px;color:#646b5e;font-size:12px;line-height:1.6;text-align:right}.history-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.history-empty{grid-column:1/-1;margin:0;padding:13px 15px;border:1px dashed #ccd4c3;border-radius:9px;color:#656c5e;font-size:12px;text-align:center}.history-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 12px;padding:14px;border:1px solid #dfe3d8;border-radius:10px;background:#fff}.history-card-main{min-width:0;border:0;background:none;padding:0;text-align:left;color:inherit;cursor:pointer}.history-card-main strong,.history-card-main span,.history-card-main small{display:block}.history-card-main strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font:600 14px/1.45 'Noto Serif',serif}.history-card-main span{margin-top:4px;color:#5e6f52;font-size:12px}.history-card-main small{margin-top:5px;color:#666a62;font-size:12px}.history-card-main:focus-visible{outline:3px solid #536b43;outline-offset:4px;border-radius:3px}.history-library{align-self:start;padding:5px 8px;border:1px solid #d9e0d2;border-radius:7px;background:#f3f6ee;color:#526a47;font-size:12px;text-decoration:none}.history-card.is-active{border-color:#8da37a;box-shadow:0 0 0 3px rgba(117,143,94,.11)}
@media(max-width:950px){.history-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.study-history{padding:18px 16px}.history-head{align-items:flex-start;flex-direction:column;gap:4px}.history-head>small{text-align:left}.history-list{grid-template-columns:1fr}}
.pdf-layout-option{display:flex;align-items:start;gap:9px;padding:12px 14px;border:1px solid #dce2d3;border-radius:9px;background:#f5f8ef;font-size:12px}.panel .pdf-layout-option input{width:16px;height:16px;margin:2px 0;flex:none}.pdf-layout-option small{display:block;margin-top:4px;color:#656c5e;font-size:12px}.pdf-dual-viewer{margin:14px 0 24px;border:1px solid #d6ddcc;border-radius:12px;overflow:hidden;background:#edf0e6}.pdf-viewer-toolbar{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:16px 18px;background:#f9fbf5;border-bottom:1px solid #d6ddcc}.pdf-viewer-toolbar strong,.pdf-viewer-toolbar small{display:block}.pdf-viewer-toolbar strong{font-size:13px}.pdf-viewer-toolbar small{margin-top:4px;font-size:12px;color:#656c5e}.pdf-page-controls{display:flex;align-items:center;gap:8px}.pdf-page-controls span{font-size:12px;white-space:nowrap}.pdf-page-controls select{width:auto;margin:0;padding:7px;font-size:12px}.pdf-viewer-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1px;background:#d3dcc8}.pdf-viewer-grid>section{min-width:0;background:#e8eddf}.pdf-viewer-grid h3{margin:0;padding:10px 16px;font-size:12px;background:#f4f7ef}.pdf-viewer-grid h3 small{float:right;font-size:12px;font-weight:400;color:#5f6e55}.pdf-viewer-scroll{height:680px;overflow:auto;overscroll-behavior:contain;padding:14px;scrollbar-gutter:stable}.pdf-page-frame{position:relative;flex:none;margin:0 auto;box-shadow:0 2px 9px #0002;overflow:hidden;background:white}.pdf-page-frame>.pdf-paper,.pdf-page-frame>img,.pdf-page-frame>canvas{position:absolute;left:0;top:0;max-width:none}.pdf-layout-notice{padding:12px 18px;margin:0;background:#f5f7ef;color:#5d6f51;font-size:12px}.pdf-dual-viewer[hidden]{display:none}
@media(max-width:680px){.pdf-viewer-toolbar{align-items:start;flex-direction:column;padding:12px}.pdf-page-controls{flex-wrap:wrap}.pdf-viewer-grid{grid-template-columns:1fr}.pdf-viewer-scroll{height:520px}.pdf-viewer-grid>section+section{border-top:1px solid #ccd6be}.result-actions{flex-wrap:wrap}}
.pdf-block-editor{background:#fffdf7;border-top:1px solid #d9e0d1;padding:14px 18px}.pdf-block-editor summary{font-size:12px;font-weight:700;cursor:pointer}.pdf-block-editor>div{padding-top:12px}.pdf-block-editor label{display:block;font-size:12px;font-weight:600}.pdf-block-editor [data-pdf-edit-source]{padding:10px 12px;background:#f0f3e9;font-size:12px;line-height:1.7;white-space:pre-wrap}.pdf-block-editor textarea{font:14px/1.8 'Times New Roman',serif;resize:vertical}.pdf-block-editor small{display:block;margin:8px 0;color:#656c5e;font-size:12px;line-height:1.7}
.content-title-field{margin-bottom:22px}.content-title-field>label{font-size:12px;font-weight:700}.content-title-line{display:flex;align-items:start;gap:8px}.content-title-line input{min-width:0}.content-title-line button{flex:none;margin-top:8px;white-space:nowrap}.content-title-line button[hidden]{display:none}#content-title[aria-invalid=true]{border-color:#b64a3b;box-shadow:0 0 0 4px rgba(182,74,59,.12)}.history-card{grid-template-columns:minmax(0,1fr);align-content:start}.history-card-main strong{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;white-space:normal;overflow-wrap:anywhere}.history-card-main .history-source{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;color:#656c60}.history-card-main time{display:block;margin-top:6px;color:#666a62;font-size:12px}.history-library{justify-self:start}.history-card-main:hover:not(:disabled){transform:none;box-shadow:none;background:none}
.library-match{margin:4px 2px 14px;padding:13px 15px;border:1px solid #c9d6b8;border-left:3px solid var(--green);border-radius:10px;background:#f1f6ea;color:#40553c;font-size:12px;line-height:1.7}.library-match p{margin:0 0 4px}.library-match-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.library-match-actions a{padding:9px 14px;border-radius:9px;background:var(--green);color:#fff;font-weight:700}.library-match-actions button{padding:8px 14px}
.library-match.layout-refresh{border-color:#e3cfa9;border-left-color:#d9a441;background:#fff8ea;color:#4d4130}

.study-history>summary{list-style:none;cursor:pointer;margin-bottom:0}.study-history>summary::-webkit-details-marker{display:none}.study-history>summary h2:before{content:'▸';display:inline-block;margin-right:8px;color:var(--green);transition:transform .2s ease}.study-history[open]>summary h2:before{transform:rotate(90deg)}.study-history[open]>summary{margin-bottom:14px}.study-history{padding-block:16px}.history-count{color:#5f6758;font:500 13px 'Be Vietnam Pro',sans-serif}
/* backwards, not both: a transform kept after the animation would hold the phone's fixed action bar inside the panel. */
@keyframes study-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:no-preference){main>*{animation:study-in .4s cubic-bezier(.2,.7,.2,1) backwards}main>*:nth-child(2){animation-delay:.05s}main>*:nth-child(3){animation-delay:.1s}main>*:nth-child(n+4){animation-delay:.15s}}
.book-target{margin-top:12px;padding-top:12px;border-top:1px solid #dce1d4}
.book-target>label{display:block;font-size:12px;font-weight:700}
.book-hint{margin:8px 0 0;color:#4f5d46;font-size:12px;line-height:1.7}
.book-hint:empty{display:none}
.book-next{margin-top:8px;padding:8px 12px;border-color:#c9d6b8;background:#f1f6ea;color:#40553c;font-size:12px}
.book-replace{display:flex;align-items:flex-start;gap:8px;margin-top:8px;font-size:12px;line-height:1.6}
.panel .book-replace input{width:18px;height:18px;margin:2px 0 0;padding:0;flex:none;accent-color:var(--green)}
.book-next[hidden],.book-replace[hidden],.study-books[hidden]{display:none}
.study-books{margin:0 0 14px}
.study-books h3{margin:0 0 8px;color:#3c4a35;font:600 14px/1.4 'Noto Serif',serif}
/* One column whatever its rows hold: an auto track would grow to a row's unwrapped part list and widen a phone page. */
.study-books-list{display:grid;grid-template-columns:minmax(0,1fr);gap:8px}
.study-book{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border:1px solid #dfe3d8;border-left:3px solid var(--green);border-radius:10px;background:#fbfcf8}
.study-book>div:first-child{min-width:0}
.study-book strong{display:block;font:600 14px/1.45 'Noto Serif',serif;overflow-wrap:anywhere}
.study-book small{display:block;margin-top:3px;overflow:hidden;color:#5f6758;font-size:12px;text-overflow:ellipsis;white-space:nowrap}
.study-book-actions{display:flex;flex:none;flex-wrap:wrap;gap:8px}
.study-book-actions button,.study-book-actions a{padding:8px 12px;font-size:12px}
.study-book-actions a{border:1px solid #d9e0d2;border-radius:10px;background:#f3f6ee;color:#526a47;font-weight:600;text-decoration:none}
.history-actions{display:flex;flex-direction:column;align-items:flex-end;gap:6px}
.history-merge{padding:5px 8px;font-size:12px;font-weight:600}
.history-card-main .history-book{margin-top:5px;overflow:hidden;color:var(--green);font-size:12px;text-overflow:ellipsis;white-space:nowrap}
.book-dialog{width:min(520px,calc(100vw - 32px));max-height:calc(100dvh - 32px);padding:0;border:1px solid var(--line);border-radius:14px;background:#fffefa;color:var(--ink);box-shadow:var(--shadow)}
.book-dialog::backdrop{background:rgba(32,40,28,.45)}
.book-dialog form{display:flex;flex-direction:column;gap:10px;padding:20px}
.book-dialog h2{margin:0;font:600 18px/1.4 'Noto Serif',serif;overflow-wrap:anywhere}
.book-dialog label{font-size:12px;font-weight:700}
.book-dialog input,.book-dialog select{width:100%;padding:11px 12px;border:1px solid #d9dbd1;border-radius:9px;background:#fff}
.book-dialog .hint{margin:0}
.book-dialog .hint:empty{display:none}
.book-order{display:grid;gap:6px;max-height:50dvh;margin:0;padding:0;overflow:auto;list-style:none;counter-reset:part}
.book-order li{display:grid;grid-template-columns:auto minmax(0,1fr) 44px 44px;align-items:center;gap:8px;padding:8px 10px;border:1px solid #e1e4da;border-radius:9px;background:#fff;counter-increment:part}
.book-order li:before{content:counter(part) '.';color:#5f6758;font-size:12px;font-weight:700}
.book-order strong,.book-order small{display:block;overflow-wrap:anywhere}
.book-order strong{font-size:13px}
.book-order small{color:#656c60;font-size:12px}
.book-order button{min-height:44px;padding:0;font-size:16px}
.book-dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:4px}
.book-dialog-actions button{min-height:44px}
.book-dialog-secondary{min-height:44px}
@media(max-width:680px){.study-book{flex-direction:column;align-items:stretch}.study-book-actions>*{flex:1;text-align:center}.history-actions{flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:flex-start}.book-dialog form{padding:16px}.book-dialog-actions>*{flex:1}}
.book-dialog input:focus,.book-dialog select:focus{border-color:#758f5e;outline:none;box-shadow:0 0 0 4px rgba(117,143,94,.12)}
.book-dialog h2:focus{outline:none}
.book-dialog .book-overlap{color:var(--red)}
.pdf-range .book-replace{font-weight:500}
.cover-choice{display:flex;align-items:flex-start;gap:12px;margin-top:12px;padding-top:12px;border-top:1px solid #dce1d4}
.cover-choice[hidden],.cover-thumb[hidden],.cover-translate[hidden],#cover-none-group[hidden],#cover-change-group[hidden]{display:none}
.cover-thumb{flex:none;width:54px;height:auto;max-height:84px;object-fit:contain;border:1px solid #cfd6c4;border-radius:4px;background:#fff;box-shadow:0 3px 8px rgba(39,53,35,.14)}
.cover-choice-body{flex:1;min-width:0}
.cover-line{display:flex;flex-wrap:wrap;align-items:center;gap:0 6px;margin:0;font-size:13px;line-height:1.5}
.cover-line strong{color:#34422f}
.cover-line>span{display:inline-flex;align-items:center;gap:6px}
.cover-sep{color:#8a9180}
.panel .cover-link{min-height:44px;padding:0 2px;border:0;border-radius:4px;background:none;color:var(--green-dark);font-size:13px;font-weight:700;text-decoration:underline;text-underline-offset:3px}
.panel .cover-link:hover:not(:disabled){transform:none;box-shadow:none;color:var(--red)}
.cover-note{margin:0;color:#5f6758;font-size:12px;line-height:1.6}
.cover-note:empty{display:none}
.pdf-range .cover-translate{display:flex;align-items:center;gap:8px;min-height:44px;font-weight:500}
.pdf-range .cover-translate[hidden]{display:none}
.panel .cover-translate input{width:18px;height:18px;margin:0;padding:0;flex:none;accent-color:var(--green)}
.cover-preview{display:grid;justify-items:center;gap:6px;margin:0}
.cover-preview img{max-width:min(220px,60vw);max-height:40dvh;min-height:60px;border:1px solid #d9dbd1;border-radius:6px;background:#fff;object-fit:contain}
.cover-preview figcaption{color:#5f6758;font-size:12px}
.source-lookup{margin:0;padding:3px 10px;font-size:12px;font-weight:600;border-radius:8px;background:#f7f9f1;border-color:#dce2d3}.pdf-page-frame>.pdf-original-page{position:absolute;left:0;top:0;max-width:none}.pdf-original-page>img{display:block;width:100%;height:100%}.pdf-original-page>.pdf-source-region{position:absolute;min-width:0;min-height:0;margin:0;padding:0;border:1px solid transparent;border-radius:1px;background:transparent;box-shadow:none;transform:none;transition:background .12s,border-color .12s}.pdf-original-page>.pdf-source-region:is(:hover,:focus-visible,[aria-pressed=true]){transform:none;box-shadow:none;border-color:#688c4c;background:rgba(147,179,112,.16);outline:2px solid rgba(104,140,76,.25);z-index:1}
.book-mode{display:grid;grid-template-columns:1fr 1fr;gap:8px;min-width:0;margin:14px 0 0;padding:0;border:0}
.book-mode[hidden],.whole-book[hidden],.whole-book-read[hidden]{display:none}
.book-mode legend{margin:0 0 6px;padding:0;font-size:12px;font-weight:700}
.book-mode label{display:flex;align-items:flex-start;gap:9px;min-height:44px;padding:11px 12px;border:1px solid #dce2d3;border-radius:10px;background:#fff;font-size:12px;cursor:pointer}
.panel .book-mode input{width:18px;height:18px;margin:1px 0 0;padding:0;flex:none;accent-color:var(--red);box-shadow:none}
.book-mode strong,.book-mode small{display:block}.book-mode strong{font-size:13px}.book-mode small{margin-top:2px;color:#5f6758;font-size:12px;line-height:1.5}
.book-mode label:has(input:checked){border-color:#a8b99a;background:#f1f6ea;box-shadow:inset 0 0 0 1px #a8b99a}
.book-mode label:has(input:disabled){cursor:not-allowed;opacity:.6}
.book-mode label:has(input:focus-visible){outline:3px solid #536b43;outline-offset:2px}
.book-mode-note{grid-column:1/-1;margin:0;color:#5f6758;font-size:12px;line-height:1.6}.book-mode-note:empty{display:none}
#range-fields[hidden]+.cover-choice{margin-top:0;padding-top:0;border-top:0}
.whole-book{min-width:0;margin:14px 0;padding:16px;border:1px solid #dce1d4;border-radius:12px;background:#f5f7f0}
.whole-book h3{margin:0;color:#34422f;font:600 16px/1.4 'Noto Serif',serif}
.whole-book-summary{margin:3px 0 0;color:#5f6758;font-size:12px;overflow-wrap:anywhere}
.whole-book-range{display:block;margin-top:12px;font-size:12px;font-weight:700}.whole-book-range small{color:#5f6758;font-weight:500}
.whole-book-estimate{margin-top:12px;padding:12px 14px;border:1px solid #e0e3d8;border-radius:10px;background:#fff;font-size:12px;line-height:1.7}
.whole-book-estimate p{margin:4px 0 0}.whole-book-estimate .estimate-head{margin:0}.whole-book-estimate .estimate-head small{color:#7a6435;font-weight:600}
.whole-book-estimate ul{margin:4px 0 0;padding-left:18px}.whole-book-estimate .estimate-total{font-weight:700;color:#34422f}.whole-book-estimate .hint{margin:6px 0 0;line-height:1.6}
.whole-book-count{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:2px 12px;margin:14px 0 4px;color:#5f6758;font-size:12px}
.whole-book-count strong{color:#34422f;font-size:14px}
.whole-book-note{margin:0 0 8px;color:#5f6758;font-size:12px}.whole-book-note:empty{display:none}
.page-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(12px,1fr));gap:3px;max-height:240px;padding:10px;overflow:auto;border:1px solid #e0e3d8;border-radius:10px;background:#fff}
.page-cell,.page-legend li:before{display:block;aspect-ratio:3/4;border-radius:2px;background:#e3e5dc}
.page-grid [data-state=working],.page-legend [data-state=working]:before{background:#d9a441}
.page-grid [data-state=working]{animation:page-working 1.4s ease-in-out infinite}
.page-grid [data-state=done],.page-legend [data-state=done]:before{background:#6f8f55}
.page-grid [data-state=nopdf],.page-legend [data-state=nopdf]:before{background:repeating-linear-gradient(135deg,#6f8f55 0 3px,#e0b052 3px 6px)}
.page-legend li[hidden]{display:none}
.page-grid [data-state=blank],.page-legend [data-state=blank]:before{background:#fff;box-shadow:inset 0 0 0 1px #c3cab8}
.page-grid [data-state=untranslated],.page-legend [data-state=untranslated]:before{background:repeating-linear-gradient(135deg,#fff 0 2px,#e0b052 2px 4px);box-shadow:inset 0 0 0 1px #c3cab8}
.page-grid [data-state=cover],.page-legend [data-state=cover]:before{background:#9b7a45}
.page-grid [data-state=skipped],.page-legend [data-state=skipped]:before{background:repeating-linear-gradient(135deg,#e3e5dc 0 2px,#fff 2px 4px)}
.page-grid [data-state=failed],.page-legend [data-state=failed]:before{background:var(--red)}
@keyframes page-working{50%{opacity:.4}}
.page-legend{display:flex;flex-wrap:wrap;gap:4px 12px;margin:8px 0 0;padding:0;list-style:none;color:#5f6758;font-size:12px}
.page-legend li{display:flex;align-items:center;gap:5px}.page-legend li:before{content:'';width:10px}
.whole-book-status{margin:10px 0 0;padding:9px 12px;border-left:3px solid #8fa27b;background:#fff;color:#40553c;font-size:12px;line-height:1.7}.whole-book-status:empty{display:none}
.whole-book-read{display:inline-block;margin-top:10px;padding:9px 13px;border:1px solid #d9e0d2;border-radius:10px;background:#f3f6ee;color:#526a47;font-size:12px;font-weight:600}
.study-book .book-job-progress{color:#40553c;white-space:normal}
.book-job-parts{margin-top:6px;font-size:12px}.book-job-parts summary{color:#526a47;font-weight:600;cursor:pointer}
.book-job-parts ul{display:grid;gap:4px;margin:6px 0 0;padding:0;list-style:none}
.book-job-parts li{display:flex;align-items:center;gap:6px}
.book-job-parts button{padding:6px 10px;font-size:12px}.book-job-parts li>button:first-child{flex:1;min-width:0;font-weight:500;text-align:left;overflow-wrap:anywhere}
.history-delete{padding:5px 8px;color:#9c382f;font-size:12px;font-weight:600}
@media(max-width:680px){.book-mode{grid-template-columns:1fr}.whole-book{padding:14px 12px}.book-job-parts button{min-height:44px}.history-delete{min-height:44px;padding:5px 12px}}
@media(max-width:600px){:root{background-image:url('/background-phone.jpg');background-image:image-set(url('/background-phone.avif') type('image/avif'),url('/background-phone.webp') type('image/webp'),url('/background-phone.jpg') type('image/jpeg'))}}
/* Keyboard focus: one visible ring everywhere (3px #536b43 on the light page). */
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:3px solid #536b43;outline-offset:2px}
.panel :is(textarea,input,select):focus-visible,.book-dialog :is(input,select):focus-visible{outline:3px solid #536b43;outline-offset:1px}
.page-canvas .ocr-region:focus-visible,.pdf-original-page>.pdf-source-region:focus-visible{outline:3px solid #536b43;outline-offset:0}
main:focus{outline:none}
.skip-link{position:absolute;left:12px;top:-80px;z-index:60;padding:12px 16px;border-radius:8px;background:#35472f;color:#fff;font-weight:700;text-decoration:underline}
.skip-link:focus,.skip-link:focus-visible{top:12px;outline:3px solid #f0b3a3;outline-offset:2px}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
/* Signed out, or the session could not be checked: a card replaces the form, which could not be used anyway. */
body:is([data-session=out],[data-session=error]) :is(.workflow,.workspace,.result,.study-history){display:none}
body:not([data-session=in]) main{min-height:100vh}
body:is([data-session=out],[data-session=error]) .hero{border-radius:18px}
body:is([data-session=out],[data-session=error]) .account-status{display:none}
.session-card[hidden]{display:none}
.session-card{margin:22px 0;padding:26px 30px;border:1px solid var(--line);border-left:4px solid var(--red);border-radius:14px;background:var(--panel);box-shadow:0 10px 32px rgba(38,52,35,.07)}
.session-card h2{margin:0 0 8px;color:#283127;font:600 22px/1.35 'Noto Serif',serif}
.session-card p{max-width:720px;margin:0 0 16px;color:#4f5849;line-height:1.75}
.session-card-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px}
.session-card-actions a.primary{display:inline-flex;min-height:46px;padding:11px 20px;border-radius:10px;font-weight:700}
.session-card-actions a:not(.primary){display:inline-flex;align-items:center;min-height:44px;color:#3f5a34;font-weight:600;text-decoration:underline;text-underline-offset:3px}
/* Contract 8: a load that failed says so where the content belongs, with Thử lại (or a sign-in link). */
.load-error{grid-column:1/-1;display:grid;justify-items:start;gap:6px;padding:14px 16px;border:1px solid #e3b7ae;border-left:3px solid var(--red);border-radius:10px;background:#fff6f3;color:#5b2a21;font-size:13px;line-height:1.6}
.load-error p{margin:0}.load-error .load-error-title{font-weight:700;color:#7d2f23}
.load-error-action{display:inline-flex;align-items:center;min-height:44px;margin-top:4px;padding:10px 16px;border:1px solid #c98a7d;border-radius:10px;background:#fff;color:#7d2f23;font-weight:700;text-decoration:none}
#progress a,.save-warning a{color:var(--red);font-weight:700;text-decoration:underline;text-underline-offset:3px}
/* Gemini key: where to get one, in three steps, and what it costs. */
.key-help{margin-top:10px;padding-top:10px;border-top:1px dashed #d9ddd0;color:#4f5849;font-size:12px;line-height:1.65}
.key-help-link{display:inline-flex;align-items:center;min-height:32px;color:#3f5a34;font-weight:700;text-decoration:underline;text-underline-offset:3px}
.key-help-link:hover{color:var(--red)}
.key-help ol{margin:4px 0 6px;padding-left:20px}.key-help li{margin:1px 0}.key-help p{margin:0;color:#5b6155}
/* The labels' floating "Bắt buộc" tag stays inside its label, so the field under it gets the full row. */
.content-title-field>label,.key-group>label{display:flow-root}
.content-title-line input,.key-line input{flex:1 1 auto;width:auto}
#glossary-hint{margin:6px 0 0}
.advanced-settings{margin-top:18px;border:1px solid #e0e3d8;border-radius:11px;background:#fafbf7}
.advanced-settings>summary{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;min-height:44px;padding:12px 14px;cursor:pointer;font-size:13px;font-weight:700}
.advanced-settings>summary small{color:#5f6758;font-size:12px;font-weight:500}
.advanced-body{padding:0 14px 14px}.advanced-body>label{display:block;font-size:12px;font-weight:700}
.usage-detail{margin:12px 0 0;color:#4f5849;font-size:12px;line-height:1.6}
/* The run controls: the main action fills its row; Dừng appears only while a run is going. */
.run-bar .actions{display:grid;gap:8px;margin-top:20px}.run-bar .actions .primary{width:100%}
.run-bar #stop[hidden]{display:none}
.save-warning{margin:16px 0 0;padding:10px 12px;border:1px solid #e3b7ae;border-left:3px solid var(--red);border-radius:9px;background:#fff6f3;color:#7d2f23;font-size:12px;font-weight:600;line-height:1.6}
.save-warning[hidden]{display:none}
.run-bar-status{display:none}
.ocr-download{margin:0 2px 14px;padding:14px 15px;border:1px solid #ecd6ab;border-left:3px solid var(--gold);border-radius:10px;background:#fff8e9;color:#5d4520;font-size:12px;line-height:1.7}
.ocr-download[hidden]{display:none}.ocr-download p{margin:0 0 6px}
.ocr-download-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.ocr-download-actions button{min-height:44px}
/* A picked PDF fills the source box itself; until then the empty box is hidden. */
.source-panel.is-pdf:has(#source:placeholder-shown) :is(.field-heading,#source,#source-lookup-hint){display:none}
@media(max-width:680px){
 html{scroll-padding-bottom:calc(var(--run-bar-height,108px) + 12px)}
 .result-head .result-actions button{min-height:44px}
 :is(.source-lookup,.history-library,.history-merge,.compare-toggle,.book-next,.whole-book-read,.library-match-actions a,.library-match-actions button,.study-book-actions button,.study-book-actions a,.key-help-link,#check-gemini-model,#save-title,#clear-key,#add-key,.backup-keys button,#evaluate){min-height:44px}
 :is(.history-library,.library-match-actions a,.study-book-actions a,.whole-book-read){display:inline-flex;align-items:center;justify-content:center}
 .pdf-page-controls :is(button,select){min-width:44px;min-height:44px}
 .panel select{min-height:44px}
 :is(.combined-output,.translation-part,.source-figures,.pdf-block-editor,.book-job-parts)>summary,.evaluation summary{min-height:44px}
 .book-job-parts summary{display:flex;align-items:center}
 .metrics{flex-wrap:wrap;align-items:center}
 /* While there is something to translate (or a run to stop), the action stays at the bottom of the screen. It never
    moves while the student taps (that would make the tap miss), and scroll-padding-bottom keeps a focused field above it. */
 .run-bar.is-floating{position:fixed;left:0;right:0;bottom:0;z-index:40;padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));border-top:1px solid #d9dfd1;background:rgba(250,249,241,.97);box-shadow:0 -6px 18px rgba(39,53,35,.12)}
 .run-bar.is-floating .actions{margin-top:0}
 .run-bar.is-floating .save-warning{margin:0 0 8px}
 .run-bar.is-floating .run-bar-status:not(:empty){display:-webkit-box;margin:0 0 8px;overflow:hidden;color:#4a5444;font-size:12px;line-height:1.5;-webkit-box-orient:vertical;-webkit-line-clamp:2}
 .run-bar.is-floating .run-bar-status.error{color:#7d2f23;font-weight:600}
 .run-bar.is-floating .save-warning:not([hidden])~.run-bar-status{display:none}
 body:has(.run-bar.is-floating){padding-bottom:calc(var(--run-bar-height,84px) + 12px)}
 .session-card{padding:20px 18px}
 /* A fitted page needs no tall empty box under it; a zoomed one still scrolls inside. */
 .pdf-viewer-scroll{height:auto;max-height:min(520px,75vh)}
}
/* "Cách dịch" counts in every run (text, kept layout, whole book): what the chosen mode does spans the row under both fields. */
.control-grid .mode-hint{grid-column:1/-1;margin:-4px 0 0;line-height:1.6}
/* A save refused because another tab saved since offers to open the newest copy. */
.save-warning .save-warning-action{margin:6px 0 0;padding:6px 12px;border-color:#c98a7d;color:#7d2f23;font-size:12px}
@media(max-width:680px){.save-warning .save-warning-action{min-height:44px}}
/* Older sessions come a page at a time under the cards ("Xem thêm bản cũ hơn"); the Gemini terms note sits with the key help. */
.history-more{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 12px;padding:12px 15px;border:1px dashed #ccd4c3;border-radius:9px}
.history-more p{flex:1 1 260px;margin:0;color:#656c5e;font-size:12px}
.history-more .history-more-error{flex-basis:100%;color:#7d2f23;font-weight:600}
.history-more button,.history-more a{min-height:44px;padding:8px 14px;font-size:12px}
.history-more button[aria-disabled=true]{cursor:progress;opacity:.7}
.key-help .key-terms{margin-top:6px}
.key-help .key-terms a{color:#3f5a34;font-weight:600;text-decoration:underline;text-underline-offset:3px}
/* "Sách của tôi": a long title or part list wraps (two lines of parts at most) instead of widening a phone's page. */
.study-book .study-book-parts{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;white-space:normal;overflow-wrap:anywhere}
.study-book .book-job-progress{overflow-wrap:anywhere}
/* The address to open in Chrome or Safari when a browser inside another app would drop the download. */
.book-dialog .in-app-copy{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px}
.book-dialog .in-app-copy button{min-height:44px}
/* A block the export found longer than its box, until it is saved again. */
.pdf-dual-viewer [data-block-id].is-overflow{outline:2px solid #b64a3b;background:#fff8f5}
/* browser-check.js: the notice a browser older than iOS/Safari 15.4 gets at the top of the page. */
.browser-notice{max-width:640px;margin:24px auto;padding:24px 28px;border:1px solid #e7c8c0;border-left:4px solid #a03c32;border-radius:12px;background:#fff8f5;color:#3b2f2a;line-height:1.7}
.browser-notice h1{margin:0 0 8px;font-size:22px}
.browser-notice p{margin:0}
.browser-notice button{min-height:44px;margin-top:14px}
@media(max-width:680px){.browser-notice{margin:16px;padding:18px}}