:root{font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;color:#252a32;background:#f6f7f9;font-synthesis:none;--paper: #fff;--ink: #252a32;--muted: #69717e;--line: #e2e5ea;--accent: #31577a;--wash: #eef1f5;--soft: #f3f5f8;color-scheme:light}:root[data-theme=dark]{--paper: #22252b;--ink: #eef0f4;--muted: #aab0ba;--line: #41464f;--accent: #a4c5e5;--wash: #2b3038;--soft: #2b3038;background:#17191e;color:var(--ink);color-scheme:dark}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,select,input[type=range]{min-height:44px}button{border:1px solid var(--line);border-radius:9px;background:var(--paper);color:var(--ink);padding:9px 16px;cursor:pointer;touch-action:manipulation}button:hover{border-color:var(--accent)}button:disabled{cursor:default;opacity:.5}.primary,.button-link.primary{background:var(--accent);color:var(--paper);border-color:var(--accent)}.button-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border:1px solid var(--line);border-radius:9px;padding:9px 16px;text-decoration:none;background:var(--paper);color:var(--ink)}.muted{color:var(--muted);line-height:1.8}.small{font-size:13px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.sign-in{max-width:450px;padding-top:70px}.sign-in form{margin-top:30px}.sign-in label,.note-dialog label{line-height:2}input[type=password]{display:block;width:100%;min-height:48px;margin:8px 0 20px;padding:10px 12px;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:8px;font-size:16px}.sign-in button{width:100%}.account-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}.account-nav select{font-size:12px}.import-card{background:var(--paper);padding:25px;border:1px solid var(--line);border-radius:12px}.import-card h2{font-size:20px;margin-bottom:12px}.import-card p{color:var(--muted);font-size:14px;line-height:1.8}.import-card input[type=file]{display:block;width:100%;min-height:44px;margin:20px 0;font-size:15px}.upload-progress{display:flex;gap:10px;flex-wrap:wrap;align-items:center;padding:15px 0}.upload-progress p{flex-basis:100%;margin:0;overflow-wrap:anywhere}.upload-progress progress{width:min(300px,100%);accent-color:var(--accent)}.upload-progress span{font-size:13px;color:var(--muted)}.library-heading{display:flex;align-items:center;justify-content:space-between;margin-top:35px}.library-heading h2{margin-bottom:0;font-size:21px}.empty-state{text-align:center;padding:40px 20px;color:var(--muted);font-size:14px;line-height:2}.document-card{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:25px;border:1px solid var(--line);border-radius:12px;background:var(--paper);margin:20px 0}.document-card h3{margin:0 0 10px;font-size:19px;overflow-wrap:anywhere}.document-card p{font-size:13px;margin-bottom:8px;color:var(--muted)}.document-actions{display:flex;gap:10px;flex-wrap:wrap;flex-shrink:0}.development-note{color:var(--muted);font-size:13px;line-height:1.9;margin:28px 0}.lab-return{padding:10px 20px;background:var(--wash);font-size:13px}.document-top{display:flex;justify-content:space-between;align-items:center;margin-top:20px;font-size:14px}.document-title{padding-top:25px}.document-title h1{font-size:clamp(24px,3vw,34px);overflow-wrap:anywhere;line-height:1.5}.reader-tools{justify-content:flex-start}.review-banner{border:1px solid #b49a65;background:var(--wash);border-radius:10px;padding:20px;display:flex;gap:15px;align-items:center;flex-wrap:wrap}.review-banner>div{flex:1;min-width:240px}.review-banner p{color:var(--muted);font-size:13px;line-height:1.9;margin:10px 0 0}.document-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:25px;padding:28px 0 120px}summary{cursor:pointer;min-height:44px;line-height:1.8;padding:10px 0;color:var(--muted);font-size:14px}.chapter-nav{position:sticky;top:20px;height:fit-content;max-height:85dvh;overflow-y:auto}.chapter-nav button{display:flex;justify-content:space-between;align-items:center;width:100%;margin:4px 0;padding:8px 10px;gap:6px;font-size:13px;text-align:left}.chapter-nav button small{font-size:11px;opacity:.75}.chapter-nav button[aria-pressed=true] small{color:inherit}.chapter-tools{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap}.chapter-tools h2{font-size:25px;font-family:Georgia,serif;font-weight:400;margin:0}.chapter-tools label{font-size:13px;color:var(--muted);display:flex;gap:8px;align-items:center;min-height:44px}.chapter-tools input{width:20px;height:20px}.block-edit{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:20px;padding-top:15px;border-top:1px solid var(--line)}.block-edit label{font-size:12px;color:var(--muted);display:flex;gap:6px;align-items:center}.block-edit select{max-width:170px;font-size:12px}.block-edit button{font-size:12px;padding:8px 10px}.edit-dialog{width:850px;--reading-size: 18px}.edit-dialog input[type=range]{width:100%}.edit-dialog td{min-width:160px}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:3px}button[aria-pressed=true]{background:var(--accent);color:var(--paper);border-color:var(--accent)}a{color:var(--accent)}h1,h2,p{margin-top:0}select{max-width:100%;border:1px solid var(--line);border-radius:7px;padding:6px 10px;color:var(--ink);background:var(--paper)}input[type=range]{width:110px;accent-color:var(--accent);vertical-align:middle}small{font-size:13px;color:var(--muted);font-weight:400}.shell{padding:env(safe-area-inset-top) max(20px,env(safe-area-inset-right)) env(safe-area-inset-bottom) max(20px,env(safe-area-inset-left));min-height:100dvh}.masthead{max-width:1000px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:22px 0;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;color:var(--ink);text-decoration:none;min-height:44px;font-size:18px;font-weight:600}.brand img{width:32px;height:32px}.brand small{display:block;font-size:12px;margin-top:4px;letter-spacing:1px}.stage-badge{font-size:12px;padding:7px 10px;border-radius:20px;background:#eae6d5;color:#655c3e;white-space:nowrap}main{max-width:1000px;margin:0 auto}.intro{padding:42px 0 27px}.eyebrow{text-transform:uppercase;font-size:12px;letter-spacing:3px;color:#a16b37}h1{font-size:clamp(29px,5vw,44px);letter-spacing:-1px;font-weight:650;margin:12px 0 16px}.intro p{color:var(--muted);font-size:15px;line-height:1.7}.tabs{display:flex;gap:8px;padding-bottom:20px}.tabs button{min-width:132px;font-size:15px}.validation-notice{background:var(--wash);border-left:3px solid #b49a65;padding:12px 15px;font-size:13px;line-height:1.8;color:var(--muted)}.tools{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:20px;margin:18px 0}.tools label,.viewer-controls label{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--muted)}.tools label span{min-width:18px}.example-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 18px}.example-tabs button{font-size:13px;background:transparent}.example-tabs button[aria-pressed=true]{background:var(--wash);color:var(--accent)}.reading-card{background:var(--paper);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 5px 25px #19382c06}.card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--muted)}.reading-card>.card-header{padding:16px 24px;border-bottom:1px solid var(--line);background:var(--wash)}.parallel{display:grid;grid-template-columns:1fr}.original,.translation{padding:28px}.translation{border-top:1px solid var(--line)}.reading-label,.translation-label{font-size:12px;letter-spacing:1px;color:var(--muted)}.translation-label{display:flex;justify-content:space-between;align-items:center;margin-top:-12px}.english{font-family:Georgia,Times New Roman,serif;font-size:var(--reading-size);line-height:1.85;color:var(--ink);overflow-wrap:anywhere;white-space:pre-line;touch-action:manipulation}.original .english{margin:17px 0 18px}.text-button{color:var(--accent);background:transparent;border:none;font-size:13px;padding:9px 10px}.text-button:hover{text-decoration:underline}.peek-zone{position:relative;padding:20px 0;touch-action:manipulation;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none;cursor:pointer}.translation-copy{font-size:calc(var(--reading-size) * .92);line-height:1.95;filter:blur(var(--blur));margin:0;pointer-events:none}.revealed .translation-copy{filter:none}.peek-hint{position:absolute;bottom:-5px;left:0;right:0;font-size:12px;color:var(--muted);text-align:center;pointer-events:none}.gesture-status{font-size:12px;color:var(--muted);margin:28px 0 0;text-align:center}.test-guidance{padding:28px 0}.test-guidance h2,.saved-notes h2{font-size:17px;font-weight:600}.test-guidance ol{padding-left:22px;color:var(--muted);font-size:14px;line-height:2.1}.test-guidance p{font-size:13px;line-height:1.8;color:var(--muted)}.word-card{position:fixed;left:max(20px,env(safe-area-inset-left));right:max(20px,env(safe-area-inset-right));bottom:calc(100px + env(safe-area-inset-bottom));z-index:5;max-width:560px;margin:auto;padding:16px 24px 22px;background:var(--paper);border:1px solid var(--line);box-shadow:0 15px 65px #102a2533;border-radius:12px}.word-card h2{font-family:Georgia,serif;font-size:27px;margin:8px 0 12px}.word-card p{font-size:16px;line-height:1.7;margin-bottom:0}.word-pos{color:var(--muted);padding:0 8px}.icon-button{font-size:28px;line-height:24px;width:44px;height:44px;padding:8px;background:transparent;border:none}.selection-toolbar{position:fixed;bottom:0;left:0;right:0;z-index:10;display:flex;gap:10px;align-items:center;background:var(--paper);border-top:1px solid var(--line);padding:12px max(20px,env(safe-area-inset-right)) calc(12px + env(safe-area-inset-bottom)) max(20px,env(safe-area-inset-left));box-shadow:0 -5px 30px #13251b0d}.selection-preview{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:13px;color:var(--muted)}.selection-toolbar label{font-size:13px}.selection-toolbar button{white-space:nowrap}.saved-notes{border-top:1px solid var(--line);padding-top:25px}.saved-notes article{padding:15px 20px;margin:14px 0;border:1px solid var(--line);border-radius:10px;background:var(--paper)}blockquote{margin:5px 0 15px;border-left:3px solid #bfab70;padding:0 15px;font-family:Georgia,serif;line-height:1.7;overflow-wrap:anywhere}.saved-notes footer{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:12px;color:var(--muted)}.saved-notes p{font-size:14px;line-height:1.8}.notice,.error{padding:15px;border-radius:8px;background:var(--wash);font-size:14px}.error{color:#b65b3b}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:20px 0}.stats>div{display:flex;flex-direction:column;gap:6px;padding:15px;border:1px solid var(--line);border-radius:9px}.stats strong{font-family:Georgia,serif;font-size:28px;font-weight:400}.stats span{font-size:12px;color:var(--muted)}.chapter-select{display:flex;align-items:center;gap:12px;font-size:14px}.chapter-select select{width:min(430px,calc(100% - 50px))}.section-heading{margin:28px 0 22px}.section-heading h2{font-family:Georgia,serif;font-size:28px;font-weight:400;margin-bottom:10px}.section-heading p{font-size:12px;color:var(--muted)}.parsed-block{border:1px solid var(--line);border-radius:10px;background:var(--paper);margin:16px 0;padding:15px 24px 24px}.block-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--muted);margin-bottom:10px}.block-meta button{margin-left:auto}.review-flag{background:#f5e5bb;color:#665119;border-radius:4px;padding:4px 7px}.type-heading .english{font-size:calc(var(--reading-size) * 1.1);font-weight:700;color:var(--accent)}.type-caption .english,.type-footnote .english,.type-sources .english{font-size:calc(var(--reading-size) * .85)}.parsed-block .english{margin:0}.image-button{padding:0;border:0;display:block;width:100%;background:transparent}.image-button img{display:block;max-height:500px;max-width:100%;margin:auto}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%}td{border-bottom:1px solid var(--line);padding:14px 16px;vertical-align:top;min-width:125px}td:first-child{width:23%;color:var(--accent);padding-left:0}td:last-child{min-width:230px;padding-right:0}.source-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px}.source-links a{display:flex;align-items:center;min-height:44px;font-size:13px}dialog{background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:14px;padding:24px;max-width:calc(100vw - 30px);max-height:90dvh}dialog::backdrop{background:#171c2866}.note-dialog{width:530px}.note-dialog h2{font-size:20px}.note-dialog label{display:block;font-size:14px}textarea{display:block;width:100%;resize:vertical;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);margin-top:10px;padding:12px;font-size:16px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}.dialog-actions button[type=submit]{background:var(--accent);color:var(--paper)}.viewer{width:min(1100px,96vw);height:94dvh;max-height:94dvh}.viewer>header{display:flex;justify-content:space-between;align-items:center}.viewer h2{font-size:18px;margin:0}.viewer-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:12px 0}.viewer-controls button{font-size:12px}.viewer-scroll{height:calc(100% - 125px);overflow:auto;background:#ddd}.page-image{position:relative;min-width:100%}.page-image img{display:block;width:100%}.source-outline{position:absolute;border:2px solid #bf592a;background:#f8cf7525;pointer-events:none}.page-footer{padding:35px 0 calc(100px + env(safe-area-inset-bottom));font-size:11px;line-height:1.9;color:var(--muted)}::highlight(note-gold){background-color:#f5d47e;color:#253329}::highlight(note-green){background-color:#b3d5b5;color:#253329}::highlight(note-blue){background-color:#bed7ed;color:#253329}@media(min-width:900px)and (orientation:landscape){.parallel{grid-template-columns:1fr 1fr}.translation{border-top:0;border-left:1px solid var(--line)}}@media(max-width:600px){.shell{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}.masthead{padding:19px 0}.brand{font-size:18px}.brand small{font-size:10px}.intro{padding-top:28px}.tools{justify-content:flex-start;gap:6px 16px}.tools input[type=range]{width:86px}.original,.translation{padding:22px}.reading-card>.card-header{padding:12px 18px;align-items:flex-start}.reading-card>.card-header span:last-child{white-space:nowrap}.selection-toolbar{flex-wrap:wrap;gap:8px;padding-left:12px;padding-right:12px}.selection-preview{flex-basis:100%}.selection-toolbar label{flex:1}.stats{gap:6px}.stats>div{padding:12px 8px}.stats strong{font-size:25px}.stats span{font-size:10px}.parsed-block{padding:12px 15px 20px}.saved-notes footer{align-items:flex-start}.viewer{padding:14px}.app-shell .masthead{align-items:flex-start;gap:15px}.account-nav{max-width:170px}.account-nav .text-button{font-size:12px;padding:8px}.document-card{flex-direction:column;align-items:stretch;padding:20px}.document-actions{justify-content:flex-start}.import-card{padding:20px}.sign-in{padding-top:40px}}@media(max-width:899px){.document-layout{grid-template-columns:minmax(0,1fr);gap:20px}.chapter-nav{position:static;max-height:260px}.chapter-nav details[open]{border-bottom:1px solid var(--line)}}.book-shell{padding:0;height:100dvh;overflow:hidden}.book-shell>.masthead{display:none}.book-shell>main{max-width:none;height:100%}.book-reader{height:100%;display:flex;flex-direction:column}.book-toolbar{display:flex;align-items:center;justify-content:center;gap:8px;padding:calc(6px + env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) 6px max(8px,env(safe-area-inset-left));border-bottom:1px solid var(--line);background:var(--paper);z-index:4}.book-toolbar button{padding:8px 12px;background:transparent;border:0;border-radius:6px}.book-toolbar>a{width:44px;min-height:44px;display:grid;place-items:center;text-decoration:none;font-size:22px}.book-toolbar select{width:84px;font-size:13px}.book-quick-actions{display:flex;gap:4px}.book-quick-actions button{display:grid;place-items:center;width:44px;height:44px;padding:0;font-size:20px}.book-quick-actions [aria-pressed=true]{color:var(--accent)}.book-page-jump{display:flex;align-items:center;gap:5px;font-size:13px;white-space:nowrap}.book-page-jump input{width:54px;min-height:36px;text-align:center;background:transparent;border:1px solid var(--line);border-radius:5px;color:var(--ink)}.book-stage{position:relative;display:flex;flex:1;min-height:0}.book-scroll{max-width:none;margin:0;flex:1;min-width:0;height:100%;overflow:auto;padding:24px 36px calc(36px + env(safe-area-inset-bottom));background:#e9ebef;overscroll-behavior:contain;touch-action:pan-x pan-y}[data-theme=dark] .book-scroll{background:#17191e}.pdf-page-frame{margin:0 auto 24px;position:relative}.pdf-sheet{position:relative;width:100%;background:#fff;color-scheme:light;box-shadow:0 2px 12px #0002}.pdf-paper-image{position:absolute;width:100%;height:100%;display:block;pointer-events:none;-webkit-user-select:none;user-select:none}.pdf-text-layer{position:absolute;top:0;left:0;transform-origin:top left;color:transparent;-webkit-text-fill-color:transparent;-webkit-user-select:text;user-select:text}.pdf-run{position:absolute;display:inline-block;transform-origin:top left;white-space:pre;cursor:text;color:transparent;-webkit-text-fill-color:transparent}.pdf-run::selection{color:transparent;background:#5294da55}.pdf-paragraph-highlight{position:absolute;pointer-events:none;background:#639de638;border-radius:2px}.paragraph-actions{position:absolute;right:-35px;display:flex;border:1px solid var(--line);border-radius:8px;background:var(--paper);box-shadow:0 2px 8px #0001}.paragraph-actions button{width:44px;min-height:44px;border:0;border-radius:8px;padding:0;color:var(--accent);background:transparent;font-size:15px}.pdf-load-message{position:absolute;bottom:0;margin:0;padding:8px;background:#fffef0;color:#745b31;font-size:12px;z-index:2}.book-translation-space{display:none}.book-translation{display:flex;flex-direction:column;height:100%;background:var(--paper)}.book-translation header,.book-outline header,.book-notes header,.book-tools header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line)}.book-translation h2,.book-notes h2,.book-tools h2{margin:0;font-size:17px;font-weight:500}.book-translation header button{border:0;background:transparent;font-size:24px;width:44px;padding:0}.book-translation>header{flex-shrink:0}.translation-body{flex:1;min-height:0;overflow-y:auto;padding:20px 20px calc(20px + env(safe-area-inset-bottom));line-height:1.8;overflow-wrap:anywhere}.translation-original{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:20px}.translation-original-heading{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:13px}.translation-original-heading button{display:grid;place-items:center;width:44px;height:44px;padding:0;border:0;background:transparent;color:var(--muted)}.translation-original-heading svg.is-collapsed{transform:rotate(180deg)}.book-english{margin:4px 0 0;line-height:1.75;white-space:pre-line}.book-chinese{line-height:1.85;white-space:pre-line}.translation-body>button{margin-top:15px;font-size:13px}.book-translation footer{padding:8px 20px calc(8px + env(safe-area-inset-bottom));border-top:1px solid var(--line);font-size:13px}.book-translation footer label{display:flex;align-items:center;gap:15px}.book-outline{position:absolute;top:0;bottom:0;left:0;z-index:5;width:min(360px,90vw);overflow-y:auto;background:var(--paper);box-shadow:8px 0 32px #0003}.book-outline>button{width:100%;display:flex;justify-content:space-between;gap:10px;border:0;border-radius:0;text-align:left;font-size:13px;background:transparent}.book-outline>button:hover{background:var(--wash)}.book-outline small{font-size:11px}.outline-status{margin:0;padding:12px 16px;font-size:13px;line-height:1.7;color:var(--muted)}.saved-tabs{display:flex;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line)}.saved-tabs [aria-selected=true]{color:var(--accent);border-color:var(--accent)}.book-notes #saved-panel>article,.saved-empty{padding:16px}.book-notes article .saved-page{display:flex;gap:18px;align-items:center;font-family:inherit}.saved-page img{width:72px;height:auto;box-shadow:0 1px 5px #0002}.book-tools{width:460px}.book-tools header{padding:0 0 10px;margin-bottom:16px}.book-tools>a,.book-tools>button,.book-tools>label{display:block;margin:10px 0;min-height:44px;padding:10px 0}.book-tools>.clear-records{margin-top:24px;padding:10px 14px;color:#b65b3b}.clear-records-dialog{width:460px}.clear-records-dialog h2{margin-top:0;font-size:18px}.clear-records-dialog p{line-height:1.7}.book-notes{position:fixed;right:0;top:0;bottom:0;width:min(420px,100vw);background:var(--paper);z-index:9;overflow-y:auto;box-shadow:-10px 0 40px #0003;padding-bottom:env(safe-area-inset-bottom)}.book-notes>p,.book-notes>article{padding:16px}.book-notes article{border-bottom:1px solid var(--line)}.book-notes article .note-quote{text-align:left;width:100%;font-family:Georgia,serif}.book-notes article p{line-height:1.8;margin-top:12px}.book-error,.book-pending{margin:0;padding:6px 16px;background:var(--wash);font-size:13px;display:flex;align-items:center;justify-content:center;gap:12px}.book-loading{padding:36px;text-align:center}.pdf-selection-toolbar>span{flex:1;overflow:hidden;max-height:44px;font-size:13px}.book-shell ::highlight(note-gold){background:#edbd3d70;color:transparent}.book-shell ::highlight(note-green){background:#82b88870;color:transparent}.book-shell ::highlight(note-blue){background:#87b7e670;color:transparent}.ai-settings{max-width:720px;margin:30px auto 70px}.ai-settings>p{line-height:1.8}.ai-settings label{display:flex;align-items:center;gap:10px;font-size:14px}.ai-settings input{width:125px;min-height:44px;padding:8px;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:6px}.ai-settings fieldset{margin:24px 0;padding:20px;border:1px solid var(--line);border-radius:8px}.model-price{display:flex;flex-wrap:wrap;align-items:center;gap:16px;padding:18px 0;border-top:1px solid var(--line)}.model-price strong{flex:1;min-width:165px;font-size:14px}.model-price strong small{display:block;margin-top:5px}@media(min-width:1100px){.book-translation-space.is-open{display:block;flex:0 0 400px;border-left:1px solid var(--line);background:var(--paper)}}@media(max-width:1099px){.book-translation-space.is-open{display:block;position:fixed;left:0;right:0;bottom:0;height:70dvh;max-height:calc(100dvh - 80px);z-index:6;border-top:1px solid var(--line);box-shadow:0 -8px 30px #0002}.book-reader:has(.book-translation-space.is-open) .pdf-selection-toolbar{bottom:min(70dvh,calc(100dvh - 80px))}}@media(max-width:500px){.book-toolbar{gap:2px;flex-wrap:wrap}.book-quick-actions{flex-basis:100%;justify-content:center}.book-toolbar button{padding:8px;font-size:13px}.book-toolbar select{width:72px;padding:6px;font-size:12px}.book-page-jump{font-size:11px}.book-page-jump input{width:42px}.pdf-selection-toolbar{gap:5px;flex-wrap:wrap;padding:8px}.pdf-selection-toolbar>span{display:none}.pdf-selection-toolbar button{padding:8px 12px}.model-price{gap:8px}.model-price strong{flex-basis:100%}.ai-settings fieldset{padding:14px}.model-price input{width:90px}}.reader-word-card{z-index:12;max-width:440px;max-height:min(55dvh,440px);overflow-y:auto;bottom:calc(24px + env(safe-area-inset-bottom))}.reader-word-card header{display:flex;justify-content:space-between;align-items:center}.reader-word-card header button{min-width:44px;font-size:24px;border:0;background:transparent}.reader-word-card h2 small{font-size:16px;font-weight:400}.dictionary-meaning{white-space:pre-line}.word-candidates{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.word-candidates [aria-pressed=true]{border-color:var(--accent);background:var(--soft)}.paragraph-explanation{border-top:1px solid var(--line);margin-top:20px;padding-top:16px}.explanation-cards h3{font-size:17px;margin-top:24px}.explanation-cards h4{font-size:15px;margin:0}.explanation-cards article{border-bottom:1px solid var(--line);padding:14px 0}.explanation-cards p{margin:8px 0}.explanation-cards blockquote{border-left:2px solid var(--accent);padding-left:10px;margin:8px 0;font-size:14px}.tutor-example{background:var(--soft);padding:10px 12px;border-radius:8px}.sentence-parts{font-size:14px;margin:14px 0}.sentence-parts dt{color:var(--muted);font-size:12px}.sentence-parts dd{margin:0 0 8px}.tutor-modifier{padding:12px 0;font-size:14px}.tutor-takeaway{padding:16px 0}.tutor-details,.advanced-ai-settings{margin:20px 0}.tutor-details summary,.advanced-ai-settings summary{cursor:pointer;min-height:44px;display:flex;align-items:center;color:var(--muted);font-size:14px}@media(min-width:1100px){.reader-word-card{margin-left:24px}}@media(max-width:1099px){.book-reader:has(.book-translation-space.is-open) .reader-word-card{bottom:min(70dvh,calc(100dvh - 80px));max-height:25dvh}}.settings-link,.settings-back{display:inline-flex;align-items:center;min-height:44px;text-decoration:none;font-size:14px}.book-library{max-width:900px;margin:36px auto}.book-library .library-heading{margin:0 0 12px;justify-content:flex-start;gap:12px}.book-library h1{margin:0;font-size:26px;font-weight:600;letter-spacing:0}.document-list{border-top:1px solid var(--line)}.document-row{display:flex;align-items:center;gap:28px;padding:28px 8px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}.document-row:hover{background:var(--paper)}.document-cover{width:112px;height:160px;object-fit:contain;background:#fff;box-shadow:0 2px 8px #0001;flex-shrink:0}.document-info{min-width:0;max-width:700px}.document-info h2{font-size:18px;font-weight:500;line-height:1.6;margin:0 0 10px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.document-info p{font-size:13px;color:var(--muted);margin:0 0 18px}.document-enter{color:var(--accent);font-size:14px}.document-enter span{margin-left:8px}.ai-settings h1{font-size:28px;letter-spacing:0;margin:16px 0 28px}.settings-section{padding:24px 0;border-top:1px solid var(--line)}.settings-section h2{font-size:17px;font-weight:600;margin:0 0 20px}.settings-row{display:flex;align-items:center;gap:16px;min-height:56px}.settings-row>label{flex:1}.settings-row input[type=range]{width:140px;padding:0;border:0}.settings-section>label{flex-direction:column;align-items:stretch}.settings-section select{min-width:110px}.maintenance-actions{display:flex;gap:16px;flex-wrap:wrap;align-items:center;margin-top:20px}@media(max-width:500px){.masthead{padding:14px 0}.book-library{margin-top:28px}.document-row{gap:20px;padding:24px 0}.document-cover{width:82px;height:118px}.document-info h2{font-size:16px}.settings-row{gap:12px}.settings-row input[type=range]{width:110px}}.translation-heading{display:flex;align-items:center;gap:8px}.translation-heading button{min-width:44px;min-height:44px;color:var(--accent)}.translation-heading .max-translation{font-size:14px}.book-notes article>small{display:block;margin-bottom:8px}.masthead-actions{display:flex;align-items:center;gap:20px}.records-page{max-width:800px;margin:32px auto 64px}.records-page h1{font-size:28px;margin:20px 0 24px}.records-back{display:inline-flex;align-items:center;min-height:44px;font-size:14px}.records-controls{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:20px}.records-controls .saved-tabs{padding:0;border:0;flex-wrap:wrap}.records-controls select{width:min(100%,260px);padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink)}.records-page article{padding:24px 0;border-bottom:1px solid var(--line)}.record-source{font-size:13px;color:var(--muted);line-height:1.7;overflow-wrap:anywhere;margin:0 0 12px}.record-document{display:block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.note-quote{display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;width:100%;text-align:left;line-height:1.7;margin-top:8px;overflow-wrap:anywhere}.note-content{white-space:pre-wrap;line-height:1.8;overflow-wrap:anywhere}.record-actions,.word-save-actions{display:flex;align-items:center;gap:12px;margin-top:12px}.record-actions button{font-size:13px;padding:8px 12px}.note-color{display:flex;align-items:center;gap:12px;margin-top:12px;font-size:13px}.note-color select{padding:8px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:8px}.annotation-entry form{margin-top:16px}.word-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.word-heading h2{margin:0;font-size:22px}.word-heading small{font-size:14px;font-weight:400;color:var(--muted)}.saved-word blockquote{margin:20px 0;padding-left:16px;border-left:2px solid var(--line);line-height:1.8}.saved-word p,.saved-word blockquote{overflow-wrap:anywhere}.saved-bookmark{display:flex;align-items:center;gap:20px}.saved-bookmark .saved-page{display:flex;gap:16px;align-items:center;flex:1;min-width:0;text-decoration:none;line-height:1.8}.saved-bookmark .saved-page img{width:60px;flex-shrink:0}.saved-bookmark>button{flex-shrink:0;font-size:13px}.book-notes header>a{font-size:13px}@media(max-width:500px){.masthead-actions{gap:12px}.records-page{margin-top:20px}.records-controls select{width:100%}.saved-bookmark,.saved-bookmark .saved-page{gap:12px}}.book-toolbar .reader-back{width:44px;padding:0;font-size:22px}.book-notes .saved-tabs{gap:6px}.book-notes .saved-tabs button{padding:8px;font-size:13px}.word-save-actions>button{padding:6px 12px;border-radius:6px;font-size:14px}.word-save-actions .word-book-link,.saved-word .word-source-link{padding:0 4px;border:0;background:transparent;color:var(--accent);font-size:14px;text-decoration:underline;text-underline-offset:3px}
