:root{--bg:#f8f6f0;--paper:#fbfaf6;--side:#eeece4;--text:#292e2c;--muted:#7a8079;--line:#dddcd2;--accent:#446957;--accent-bg:#e2e9df;--warn:#96641e;--font-size:19px;--line-height:1.9;--page-width:1120px;--zh-width:50%;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:"Segoe UI","Microsoft YaHei",sans-serif}body.dark{--bg:#1c2421;--paper:#202925;--side:#18201d;--text:#d6ddd4;--muted:#96a49b;--line:#37463d;--accent:#aac9b3;--accent-bg:#304239;--warn:#e0b773;color-scheme:dark}button,.file-button{font:inherit;font-size:13px;border:1px solid var(--line);background:transparent;color:var(--text);border-radius:6px;padding:8px 12px;cursor:pointer}button:hover,.file-button:hover{background:var(--accent-bg)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button:disabled{opacity:.35;cursor:default}a{color:inherit;text-decoration:none}[hidden]{display:none!important}
#sidebar{position:fixed;inset:0 auto 0 0;width:248px;background:var(--side);padding:28px 23px;display:flex;flex-direction:column;border-right:1px solid var(--line);z-index:4}.brand{font-family:serif;font-size:25px;letter-spacing:4px;white-space:nowrap}.brand span{display:block;font:9px "Segoe UI",sans-serif;letter-spacing:2.4px;margin-top:8px;color:var(--muted)}.book-mark{margin-top:32px;font:27px Georgia,serif;color:var(--accent);border-left:3px solid var(--accent);padding-left:12px}.book-mark span{font-size:16px;margin-left:9px}h1{font-family:"Songti SC","SimSun",serif;font-size:23px;font-weight:500;line-height:1.6;margin:14px 0 5px}.author{font-size:10px;letter-spacing:2px;color:var(--muted);margin-bottom:30px}.toc-heading{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding-bottom:15px;border-bottom:1px solid var(--line)}#toc{overflow-y:auto;flex:1;padding-top:10px}#toc button{display:block;width:100%;text-align:left;border:0;margin:4px 0;padding:11px 9px;line-height:1.5;font-size:12px}#toc button.active{background:var(--accent-bg);color:var(--accent);font-weight:600}.offline{font-size:10px;letter-spacing:1px;color:var(--accent);margin:20px 0 0}.workspace{margin-left:248px}header{height:68px;position:sticky;top:0;z-index:3;display:flex;align-items:center;gap:15px;padding:0 32px;background:var(--bg);border-bottom:1px solid var(--line)}#currentLabel{font-size:12px;color:var(--muted);flex:1}.header-actions{display:flex;gap:8px;align-items:center}.header-actions button{border:0}#reviewCount{background:var(--accent-bg);padding:2px 6px;border-radius:8px}#menu{border:0;padding:5px}.workspace main{width:calc(100% - 80px);max-width:var(--page-width);margin:0 auto;padding-bottom:90px}.chapter-intro{padding:62px 0 36px;border-bottom:1px solid var(--line)}.eyebrow{font-size:11px;color:var(--accent);letter-spacing:3px}.chapter-intro h2{font:500 32px "SimSun",serif;margin:20px 0 13px}#chapterSubtitle{font:13px Georgia,serif;letter-spacing:1.4px;color:var(--muted)}#chapterNote{font-size:11px;color:var(--muted);margin-top:22px}.column-head,.pair{display:grid;grid-template-columns:minmax(0,var(--zh-width)) minmax(0,1fr)}.column-head{padding:21px 0 15px;font-size:12px;color:var(--accent);letter-spacing:2px}.column-head span{padding:0 26px}.column-head small{margin-left:8px;color:var(--muted);font-size:9px;letter-spacing:1px}.pair{position:relative;scroll-margin-top:85px;border-bottom:1px solid var(--line);padding:22px 0;background:var(--paper)}.cell{min-width:0;padding:0 26px;font-size:var(--font-size);line-height:var(--line-height);overflow-wrap:anywhere}.cell.zh{font-family:"Noto Serif CJK SC","Songti SC","SimSun",serif}.cell.en{font-family:Georgia,"Times New Roman",serif;border-left:1px solid var(--line)}.cell p{margin:0 0 .8em;white-space:pre-wrap}.cell p:last-child{margin-bottom:0}.cell.other{grid-column:1/-1;background:var(--accent-bg);padding:12px 26px}.row-info{grid-column:1/-1;display:flex;gap:12px;align-items:center;padding:16px 26px 0;font-size:10px;color:var(--muted)}.row-info button{font-size:10px;padding:3px 8px;color:var(--warn);border-color:var(--line)}.pair.flagged{border-left:2px solid var(--warn)}.pair.selected{outline:2px solid var(--accent);outline-offset:-2px}.chapter-nav{display:flex;justify-content:space-between;gap:12px;margin-top:34px}.alignment-note{font-size:11px;color:var(--muted);text-align:center;margin-top:25px}footer{position:fixed;bottom:0;left:248px;right:0;background:var(--bg);border-top:1px solid var(--line);padding:13px 32px;display:flex;justify-content:space-between;font-size:10px;color:var(--muted);z-index:3}progress{position:absolute;bottom:0;left:0;width:100%;height:2px;border:0;accent-color:var(--accent)}#settings{position:fixed;top:64px;right:24px;z-index:6;background:var(--side);padding:24px;border:1px solid var(--line);border-radius:10px;box-shadow:0 15px 50px #0002;width:340px}#settings label{display:grid;grid-template-columns:90px 1fr 45px;align-items:center;font-size:12px;margin-bottom:20px;gap:10px}input[type=range]{width:100%;accent-color:var(--accent)}output{text-align:right}body.toc-hidden #sidebar{display:none}body.toc-hidden .workspace{margin-left:0}body.toc-hidden footer{left:0}dialog{width:min(850px,94vw);max-height:90vh;overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--text);padding:25px}dialog::backdrop{background:#0008}dialog p{font-size:12px;line-height:1.8;color:var(--muted)}.dialog-heading{display:flex;align-items:center;justify-content:space-between}.dialog-heading h2{font-size:20px}textarea{display:block;width:100%;height:38vh;background:var(--paper);color:var(--text);border:1px solid var(--line);padding:12px;margin:12px 0;font:12px/1.6 Consolas,monospace}.editor-actions{display:flex;flex-wrap:wrap;gap:10px}.file-button input{display:none}#sourceList{max-height:220px;overflow:auto;font-size:12px;line-height:1.6}#sourceList p{white-space:pre-wrap;border-bottom:1px solid var(--line)}#editError{color:var(--warn)}#toast{position:fixed;bottom:58px;left:50%;transform:translateX(-50%);background:var(--accent-bg);border:1px solid var(--line);padding:12px 22px;border-radius:8px;z-index:10;font-size:13px}
@media(min-width:1600px){.chapter-intro{padding-top:75px}}@media(max-width:1050px){#sidebar{width:210px;padding:24px 16px}.workspace{margin-left:210px}footer{left:210px}.workspace main{width:calc(100% - 40px)}.cell,.column-head span{padding-left:17px;padding-right:17px}header{padding:0 18px}}@media(max-width:760px){#sidebar{display:none;width:248px;box-shadow:10px 0 40px #0003}body.mobile-toc #sidebar{display:flex}.workspace{margin-left:0}footer{left:0}.workspace main{width:calc(100% - 24px)}header{gap:8px;padding:0 10px}.header-actions{gap:0}.header-actions button{padding:8px}#settingsToggle span{display:none}#currentLabel{max-width:130px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chapter-intro{padding:35px 12px 25px}.chapter-intro h2{font-size:25px}.cell{padding:0 10px;font-size:calc(var(--font-size) * .9)}.column-head span{padding:0 10px}.column-head small{display:none}.row-info{padding-left:10px;flex-wrap:wrap}.chapter-nav button{font-size:11px;padding:8px}.alignment-note{line-height:1.8}.chapter-nav{gap:5px}}

/* v2: touch controls, library, and layout override without independent text scrolling. */
button,.file-button,select{min-height:40px;touch-action:manipulation}#bookTitle{font-size:18px;max-height:100px;overflow:auto}.book-mark{margin-top:24px}.author{margin-bottom:20px}
#bookList button{display:block;margin:12px 0;width:100%;text-align:left}#library{max-width:720px}#library h3{font-size:15px;border-top:1px solid var(--line);padding-top:22px;margin-top:26px}#loginForm{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}#loginForm label{display:flex;flex-direction:column;gap:8px;font-size:12px;flex:1}#loginForm input{width:100%;min-width:150px;padding:10px;background:var(--paper);border:1px solid var(--line);color:var(--text);border-radius:5px}#loginForm button{align-self:end}#settings{max-width:calc(100vw - 24px);max-height:calc(100dvh - 130px);overflow:auto}#settings select{grid-column:2/4;min-width:0;background:var(--paper);color:var(--text);border:1px solid var(--line)}#remoteNotice{position:sticky;top:68px;background:var(--accent-bg);padding:12px;z-index:2;display:flex;gap:12px;align-items:center;font-size:12px}.conflict{background:var(--accent-bg);padding:12px;margin:12px 0}.conflict pre{max-height:220px;overflow:auto;font-size:11px}#syncStatus{overflow-wrap:anywhere}#bookmarkList button{margin:4px}footer #saveState{max-width:82%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}body[data-layout=stacked] .pair{grid-template-columns:minmax(0,1fr)}body[data-layout=stacked] .cell.en{border-left:0;border-top:1px dashed var(--line);margin-top:20px;padding-top:20px}body[data-layout=stacked] .column-head{display:none}body[data-layout=stacked] .cell::before{display:block;font:10px "Segoe UI",sans-serif;color:var(--muted);letter-spacing:2px;margin-bottom:12px}body[data-layout=stacked] .cell.zh::before{content:'中文 / CHINESE'}body[data-layout=stacked] .cell.en::before{content:'英文 / ENGLISH'}
@media(max-width:600px){body:not([data-layout=columns]) .pair{grid-template-columns:minmax(0,1fr)}body:not([data-layout=columns]) .cell.en{border-left:0;border-top:1px dashed var(--line);margin-top:20px;padding-top:20px}body:not([data-layout=columns]) .column-head{display:none}body:not([data-layout=columns]) .cell::before{display:block;font:10px "Segoe UI",sans-serif;color:var(--muted);letter-spacing:2px;margin-bottom:12px}body:not([data-layout=columns]) .cell.zh::before{content:'中文 / CHINESE'}body:not([data-layout=columns]) .cell.en::before{content:'英文 / ENGLISH'}.cell{font-size:var(--font-size);padding:0 18px}.pair{padding-top:24px}.row-info{padding:16px 18px 0}header{height:64px}#currentLabel{display:none}.header-actions{flex:1;justify-content:space-between}.header-actions button{min-width:42px}#settings{top:62px;right:12px}#sidebar{width:85vw;max-width:310px}dialog{padding:18px}dialog textarea{font-size:13px}.chapter-intro h2{line-height:1.6}footer{padding-bottom:max(13px,env(safe-area-inset-bottom))}.chapter-nav{flex-wrap:wrap}.editor-actions{gap:8px}#remoteNotice{top:64px}.brand{font-size:22px}}