:root{--font-ui:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;font-family:var(--font-ui);font-size:16px;line-height:1.6;color:#342e26;background:#f5f1e8;--primary:#48664b;--muted:#6e6254;--line:#ddd5c7;--danger:#b83340;--ink:#342e26}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit;color:inherit}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer;min-height:42px;padding:9px 16px;border:1px solid var(--line);border-radius:10px;background:#fffdf8;line-height:1.4}button:hover:not(:disabled){background:#f8f4ed}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #799570;outline-offset:3px}.primary{background:var(--primary);border-color:var(--primary);color:#fffdf8}.primary:hover:not(:disabled){background:#374f39}.secondary{background:#fffdf8;border-color:#ddd5c7}.text-button,.quiet{background:transparent;border:0;color:var(--primary);padding:7px 6px}.selected{background:#e7eddf!important;border-color:var(--primary)!important;color:#48664b}.full{width:100%}a{color:var(--primary)}input,select,textarea{width:100%;min-height:44px;padding:10px 13px;border:1px solid #ddd5c7;border-radius:9px;background:#fffdf8;caret-color:var(--primary)}textarea{line-height:1.8;resize:vertical}input::placeholder,textarea::placeholder{color:#6e6254}label{display:flex;flex-direction:column;gap:7px;margin-bottom:18px;font-size:14px}input[type=checkbox]{width:18px;min-height:18px;accent-color:var(--primary)}label.checkbox{flex-direction:row;align-items:center;gap:9px}h1,h2,h3,p{margin:0}h1{font-size:28px;line-height:1.4;letter-spacing:-.025em}h2{font-size:19px;line-height:1.5}h3{font-size:17px;line-height:1.6}p{line-height:1.8}.subtle,.muted{color:var(--muted)}.small,small{font-size:13px}.prewrap{white-space:pre-wrap;overflow-wrap:anywhere}.error,.success,.empty-inline,.import-preview{padding:13px 16px;border-radius:9px;margin-block:12px;overflow-wrap:anywhere}.error{color:#a62c3a;background:#fff0f1}.success,.import-preview{color:#26714c;background:#edf8f0}.empty-inline{background:#f8f4ed;color:#6e6254}.text-success{color:#257147}.text-error{color:var(--danger)}.button-row{display:flex;align-items:center;gap:13px;flex-wrap:wrap}::selection{background:#f0eadf;color:#48664b}::-webkit-scrollbar{width:8px;height:7px}::-webkit-scrollbar-thumb{background:#ddd5c7;border-radius:8px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0)}.app-icon{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.workspace-shell{display:grid;grid-template-columns:196px minmax(0,1fr);min-height:100svh}.workspace-nav{position:sticky;top:0;height:100svh;align-self:start;background:#fffdf8;padding:34px 18px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:40}.workspace-brand{display:flex;align-items:center;gap:9px;padding:0 9px 39px;text-decoration:none;color:#48664b;white-space:nowrap;font-size:19px;font-weight:700}.workspace-brand .app-icon{color:var(--primary);width:25px;height:25px}.workspace-nav nav{display:flex;flex-direction:column;gap:10px}.workspace-nav nav button{display:flex;align-items:center;gap:13px;padding:13px 17px;border:0;background:none;color:#6e6254;min-height:49px;text-align:left;font-size:16px}.workspace-nav nav button.active{color:var(--primary);background:#e7eddf;font-weight:700}.nav-account{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding:18px 9px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.nav-account button{padding:7px;background:none;border:0;min-height:36px}.workspace-body{min-width:0}.workspace-topbar{height:76px;padding:17px 42px;display:flex;align-items:center;gap:24px;border-bottom:1px solid var(--line);background:#fffdf8b3}.workspace-topbar>span{font-size:14px;color:#6e6254}.quick-search{margin-left:auto}.quick-search button{display:flex;align-items:center;gap:9px;background:#f8f4ed;border:0;min-width:235px;color:#6e6254;font-size:13px;min-height:36px;text-align:left}.quick-search .app-icon{width:17px;height:17px}.quick-search kbd{font:12px var(--font-ui);color:#6e6254;margin-left:auto;border:1px solid #f0eadf;border-radius:4px;padding:0 5px}.account-button{border:0;border-radius:50%;width:34px;height:34px;min-height:34px;padding:0;background:#f8f4ed;color:#48664b}.page{max-width:1160px;margin:auto;padding:35px 42px 48px}.page-title{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.page-title p{font-size:14px;margin-top:7px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px}.section-heading>span,.section-heading p{font-size:12px}.section-heading p{margin-top:5px}.section-heading .text-button{font-size:13px}.global-messages{padding-inline:42px;max-width:1160px;margin:auto}.global-messages p{font-size:14px}.loading-screen{padding:25vh 24px;text-align:center;color:var(--muted)}.desk-greeting{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;gap:15px}.desk-greeting p{font-size:13px;margin-bottom:5px}.checkin-button{font-size:14px;color:var(--primary);border-color:#ddd5c7;min-width:114px}.checkin-button.is-done{background:#f8f4ed;opacity:1;color:#48664b}.desk-start{background:#f8f4ed;border-radius:16px;padding:28px 30px;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;margin-bottom:26px}.desk-start h2{font-size:22px;color:#48664b;font-weight:700;margin-bottom:9px}.desk-start p{color:#6e6254;font-size:13px;margin-bottom:22px}.desk-start .primary{padding:12px 24px;min-width:145px}.desk-start .text-button{font-size:13px}.desk-today{display:flex;align-items:center;gap:25px;padding-left:25px;border-left:1px solid #ddd5c7}.desk-today div{display:flex;flex-direction:column;gap:7px}.desk-today strong{font-size:29px;font-weight:400;line-height:1.2;color:#48664b;white-space:nowrap}.desk-today strong small{font-size:12px}.desk-today span{font-size:12px;color:#6e6254}.desk-middle{display:grid;grid-template-columns:1.25fr 1fr;gap:25px;margin-bottom:28px}.focus-panel,.exam-panel{background:#fffdf8;border-radius:14px;padding:24px 27px}.focus-panel .section-heading,.exam-panel .section-heading{margin-bottom:10px}.timer-display{text-align:center;font-size:61px;line-height:1.2;letter-spacing:.02em;color:#6e6254;font-variant-numeric:tabular-nums;margin-top:13px}.timer-caption{font-size:12px;color:var(--muted);text-align:center;margin-top:7px}.timer-presets{display:flex;justify-content:center;gap:8px;align-items:center;margin-top:18px}.timer-presets button{font-size:12px;min-height:34px;padding:7px 10px;border-color:transparent;background:#f8f4ed}.custom-time{display:flex;flex-direction:row;align-items:center;gap:4px;margin:0;color:#6e6254;font-size:12px}.custom-time input{width:53px;min-height:34px;height:34px;padding:6px;font-size:12px}.timer-actions{display:flex;justify-content:center;gap:10px;margin-top:18px}.timer-actions button{min-height:39px;padding:9px 22px;font-size:14px}.exam-subject{font-size:16px;color:#6e6254;margin-top:22px}.exam-count{display:flex;align-items:baseline;gap:13px;margin:10px 0 7px}.exam-count strong{font-size:64px;font-weight:400;line-height:1.2;color:#6e6254}.exam-count span{font-size:14px;color:#6e6254}.exam-panel>.subtle{font-size:12px}.exam-empty{padding-top:27px}.exam-empty>p:first-child{font-size:19px;color:#6e6254}.exam-empty .subtle{font-size:13px;margin-top:7px}.exam-empty button{font-size:13px;margin-top:21px}.activity-panel{background:#fffdf8;padding:25px 28px;border-radius:14px;margin-bottom:25px}.activity-streak{color:var(--primary);font-size:13px!important}.heatmap-scroll{overflow-x:auto;padding-block:2px}.heatmap{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,12px);grid-auto-columns:12px;gap:5px;min-width:max-content;justify-content:space-between}.heatmap button,.heatmap-blank{padding:0;min-height:12px;width:12px;height:12px;min-width:12px;border:0;border-radius:3px}.heatmap button:hover{outline:2px solid #a79a85;outline-offset:2px}.heat-level-0{background:#f0eadf!important}.heat-level-1,.heat-level-2{background:#ddd5c7!important}.heat-level-3,.heat-level-4{background:#48664b!important}.heatmap-caption{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-top:14px;color:#6e6254;font-size:12px}.heatmap-caption p{max-width:70ch}.heatmap-caption>span{display:flex;gap:4px;align-items:center;white-space:nowrap}.heatmap-caption i{display:block;width:9px;height:9px;border-radius:2px}.desk-saved{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:30px}.desk-saved>button{display:flex;gap:15px;align-items:center;text-align:left;border:0;border-radius:12px;padding:20px 24px;background:#fffdf8}.desk-saved .app-icon{width:25px;height:25px;color:#48664b}.desk-saved>button>span:nth-child(2){flex:1}.desk-saved strong{display:block;font-size:16px}.desk-saved small{display:block;font-size:12px;color:var(--muted);margin-top:3px}.desk-saved>button>span:last-child{color:#6e6254}.recent-list{padding:0 3px}.recent-list h2{font-size:17px}.recent-list>button{display:flex;justify-content:space-between;align-items:center;text-align:left;width:100%;background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;padding:16px 0;font-size:13px}.recent-list strong{display:block;font-weight:400;font-size:15px}.recent-list small{display:block;color:var(--muted);font-size:12px;margin-top:4px}.recent-list>button>span:last-child{color:#6e6254}.practice-hub{max-width:950px}.practice-setup{padding:28px 32px;background:#fffdf8;border-radius:15px}.practice-setup h2{font-size:20px;margin-bottom:20px}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:26px}.mode-grid button{text-align:left;padding:17px 20px;background:#f8f4ed;border:1px solid #f0eadf;min-height:87px}.mode-grid strong{display:block;font-size:17px;font-weight:400}.mode-grid small{display:block;font-size:12px;color:#6e6254;margin-top:7px}.mode-grid .selected{border-width:1px}.range-fields,.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.range-fields label{font-size:13px;color:#6e6254}.range-fields select{color:#6e6254;background:#fffdf8}.round-size{display:flex;align-items:center;gap:9px;font-size:13px;margin:2px 0 17px}.round-size>span{margin-right:auto;color:#6e6254}.round-size button{padding:7px 17px;min-height:36px;font-size:13px;border-color:#f0eadf}.advanced-options{border-top:1px solid var(--line);padding-top:8px;margin-top:18px}.advanced-options summary{font-size:13px;color:#6e6254;padding:10px 0;cursor:pointer}.advanced-options .form-grid{padding-top:15px}.advanced-options label{font-size:13px}.start-round{width:100%;margin-top:16px;min-height:49px;display:flex;align-items:center;justify-content:center;gap:30px;font-size:16px}.setup-footnote{text-align:center;font-size:12px;color:#6e6254;margin-top:12px}.practice-shortcuts{display:flex;justify-content:space-between;gap:12px;padding-top:22px}.practice-shortcuts button{background:none;border:0;color:#6e6254;font-size:13px;padding-inline:4px}.practice-shortcuts span{margin-left:18px;color:#6e6254}.practice-page{max-width:1300px}.practice-page>.page-title h1{font-size:21px}.practice-page>.page-title p{font-size:12px}.practice-page>.page-title button{font-size:12px;min-height:36px}.study-workspace{max-width:800px;margin:auto;display:grid;grid-template-columns:1fr;align-items:start;gap:24px}.study-workspace.with-ai{max-width:none;grid-template-columns:minmax(0,1fr) 360px}.question-pane{min-width:0;background:#fffdf8;padding:28px 30px;border-radius:14px}.question-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:20px}.question-toolbar>.text-button{font-size:12px;color:#6e6254;padding-left:0}.question-toolbar>div{display:flex;gap:7px}.question-toolbar button{font-size:12px;min-height:34px;padding:7px 12px}.favorite-control{color:#6e6254;background:none;border:0;padding:7px;min-height:34px;font-size:12px}.favorite-control[aria-pressed=true]{color:#48664b;background:#e7eddf}.question-meta{display:flex;gap:12px;flex-wrap:wrap;color:#6e6254;font-size:12px;margin-bottom:18px}.question-stem{font-weight:400;font-size:21px;line-height:1.85;white-space:pre-wrap;overflow-wrap:anywhere;margin-bottom:23px}.question-images{display:flex;flex-direction:column;gap:12px;margin:0 0 24px}.question-images>button{width:100%;background:#fffdf8;border:1px solid #f0eadf;padding:12px;overflow:hidden;border-radius:9px;max-height:430px}.question-images img{display:block;max-width:100%;max-height:400px;object-fit:contain;margin:auto}.options{display:flex;flex-direction:column;gap:11px;margin-bottom:25px}.option{display:flex;text-align:left;align-items:flex-start;gap:15px;padding:15px 18px;border-color:#f0eadf;width:100%;min-height:54px;font-size:17px}.option-letter{font-weight:700;min-width:20px;color:#6e6254}.option>span:nth-child(2){flex:1;white-space:pre-wrap;overflow-wrap:anywhere}.option.correct{background:#edf7f0;border-color:#a3d3b1;color:#286343;opacity:1}.option.chosen:not(.correct){background:#fff1f2;border-color:#e2a6ae;opacity:1}.option small{font-size:12px}.answer-controls{padding-top:22px;border-top:1px solid var(--line);margin-top:10px}fieldset{border:0;padding:0;margin:0 0 18px}legend{padding:0;margin:0 0 12px;font-size:13px;color:#6e6254}.confidence-buttons{display:flex;gap:8px}.confidence-buttons button{flex:1;font-size:13px;min-height:38px;padding:8px}.answer-controls>.checkbox{font-size:12px;color:#6e6254;margin-bottom:17px}.answer-controls>.primary{min-height:46px}.reference-answer{margin:20px 0;background:#f8f4ed;padding:17px;border-radius:9px}.reference-answer p{white-space:pre-wrap;margin-block:8px}.answer-feedback{padding-top:25px;border-top:1px solid var(--line);margin-block:22px}.answer-feedback h3{margin:0 0 13px}.answer-feedback h3:not(:first-child){margin-top:22px}.answer-feedback p{font-size:14px;margin-bottom:9px;overflow-wrap:anywhere}.answer-feedback details{font-size:13px}.answer-feedback .small{font-size:12px}.note-section{margin-top:25px;border-top:1px solid var(--line);padding-top:8px}.note-section summary{font-size:14px;padding:14px 0;cursor:pointer;color:#6e6254;display:flex;justify-content:space-between;align-items:center}.note-section summary>span{font-size:12px;color:#6e6254}.note-section>label{font-size:12px;color:#6e6254}.note-section textarea{font-size:14px;margin-top:3px;min-height:100px}.note-section .button-row button{font-size:13px;min-height:35px}.review-strip{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:22px}.review-strip button{font-size:12px;min-height:32px;padding:7px 11px}.review-strip .active{background:#f8f4ed;border-color:var(--primary)}.review-strip .incorrect{color:#b13c4b}.exam-clock{margin-left:12px;color:#b7623a}.related-details{max-width:800px;margin:20px auto 30px;padding:0 30px}.related-details summary{font-size:13px;color:#6e6254;cursor:pointer}.related-section{padding:20px 0}.related-section label{font-size:13px}.related-section h2{font-size:15px}.related-section p{font-size:12px;margin-top:10px}.related-section .button-row{margin-top:12px}.related-section button{font-size:12px}.question-chat{background:#fffdf8;padding:23px 24px;border-radius:14px;min-width:0}.chat-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.chat-heading h2{font-size:19px}.quiet-label{font-size:12px;color:#6e6254;background:#e7eddf;padding:4px 7px;border-radius:5px;white-space:nowrap}.chat-intro{font-size:12px;color:#6e6254;margin:12px 0 18px;line-height:1.9}.chat-suggestions{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:19px}.chat-suggestions button{font-size:12px;min-height:32px;padding:7px 9px;background:#f8f4ed;border-color:#f0eadf;color:#6e6254}.chat-section-head{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px;color:#6e6254;margin-bottom:13px}.chat-section-head button{border:0;padding:4px;background:none;min-height:30px;color:#6e6254;font-size:12px}.saved-explanation{padding-block:20px;border-block:1px solid var(--line);margin-bottom:20px}.chat-turn{margin-top:18px;border-bottom:1px solid var(--line);padding-bottom:19px}.student-message{background:#f8f4ed;padding:12px 14px;border-radius:9px;margin-bottom:18px}.student-message>span{font-size:12px;color:#6e6254}.student-message p{font-size:14px;line-height:1.8;margin-top:5px;white-space:pre-wrap;overflow-wrap:anywhere}.assistant-message{padding:0 1px}.chat-composer{margin-top:23px}.chat-composer label{font-size:13px}.chat-composer textarea{font-size:13px;min-height:100px}.chat-send-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px}.chat-send-row>span{font-size:12px;color:#6e6254;max-width:145px}.chat-send-row button{font-size:12px;padding:9px 13px;min-height:37px;white-space:nowrap}.chat-working{font-size:12px;color:#6e6254;padding:13px 0}.markdown-content{font-size:16px;line-height:1.9;overflow-wrap:anywhere;max-width:75ch}.markdown-content>:first-child{margin-top:0}.markdown-content p{margin:12px 0;line-height:1.9}.markdown-content h1,.markdown-content h2,.markdown-content h3,.markdown-content h4{font-size:18px;line-height:1.6;margin:23px 0 10px}.markdown-content h1{font-size:22px}.markdown-content strong{font-weight:700;color:#6e6254}.markdown-content ul,.markdown-content ol{padding-left:22px;margin:13px 0}.markdown-content li{margin:7px 0}.markdown-content .table-scroll{overflow-x:auto;max-width:100%;margin-block:18px}.markdown-content table{border-collapse:collapse;font-size:13px;width:100%;white-space:nowrap;text-align:left}.markdown-content th,.markdown-content td{padding:9px 11px;border-bottom:1px solid var(--line)}.markdown-content th{background:#f8f4ed;font-weight:400;color:#6e6254}.markdown-content blockquote{background:#f8f4ed;border-radius:9px;padding:5px 14px;margin:16px 0;font-size:14px;color:#6e6254}.markdown-content pre{overflow:auto;background:#f8f4ed;padding:14px;border-radius:8px;font-size:13px}.markdown-content .katex-display{overflow-x:auto;overflow-y:hidden;max-width:100%;padding-block:5px}.collection-tabs{display:flex;gap:20px;border-bottom:1px solid var(--line);margin-bottom:22px}.collection-tabs button{border:0;border-radius:0;background:none;color:#6e6254;padding:10px 3px 14px;font-size:14px}.collection-tabs .active{color:var(--primary);border-bottom:2px solid var(--primary)}.collection-search{display:flex;gap:10px}.collection-search input{background:#fffdf8;font-size:14px}.collection-search button{font-size:14px;min-width:84px}.search-help{font-size:12px;color:#6e6254;margin-top:9px}.collection-count{font-size:12px;color:#6e6254;margin:23px 0 8px}.collection-item{padding:23px 26px;background:#fffdf8;border-radius:12px;margin-bottom:12px}.collection-item-top{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:#6e6254;margin-bottom:9px}.collection-item h2{font-size:18px;font-weight:400;line-height:1.8;white-space:pre-wrap}.note-snippet{font-size:13px;color:#6e6254;background:#f8f4ed;padding:11px 14px;border-radius:7px;margin-top:12px}.collection-item .markdown-content{margin-top:15px}.collection-item-bottom{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:18px}.collection-item-bottom>span{font-size:12px;color:#6e6254}.collection-item-bottom>div{display:flex;gap:9px;align-items:center}.collection-item-bottom button{font-size:12px;min-height:35px;padding:7px 11px}.pagination{display:flex;justify-content:center;align-items:center;gap:18px;margin-top:24px;font-size:13px}.pagination button{font-size:12px}.empty-state{padding:50px 20px;text-align:center}.empty-state h2{font-size:20px;margin-bottom:10px}.empty-state p{font-size:13px}.my-page{max-width:900px}.profile-section{display:flex;align-items:center;gap:17px;background:#fffdf8;padding:24px;border-radius:13px;margin-bottom:22px}.profile-avatar{display:grid;place-items:center;background:#f8f4ed;color:#48664b;width:49px;height:49px;border-radius:50%;font-size:25px}.profile-section h2{font-size:20px}.profile-section p{font-size:12px;margin-top:4px}.my-links{background:#fffdf8;padding:0 24px;border-radius:13px}.my-links>button{display:flex;justify-content:space-between;align-items:center;gap:15px;width:100%;border:0;border-bottom:1px solid var(--line);border-radius:0;min-height:63px;font-size:15px;padding:17px 0;text-align:left}.my-links>button:last-child{border:0}.my-links>button>span:last-child{color:#6e6254;font-size:13px}.exam-edit{background:#fffdf8;border-radius:13px;padding:24px;margin-top:24px}.exam-edit .subtle{font-size:13px}.exam-edit form{margin-top:20px}.exam-edit button{font-size:13px}.narrow-page{max-width:900px}.narrow-page>h1{margin-bottom:18px}.narrow-page>p{font-size:14px;margin-block:12px}.form-section{padding:25px 0;border-bottom:1px solid var(--line)}.form-section h2{font-size:18px;margin-bottom:20px}.form-section p{font-size:14px;margin-block:12px}.form-section form{margin-top:18px}.restore-section{margin-top:23px}.restore-section summary{font-size:14px;cursor:pointer;padding-block:10px}.form-section button,.narrow-page .button-row button{font-size:13px}.editor-images{display:flex;gap:14px;flex-wrap:wrap}.editor-images figure{margin:0}.editor-images img{max-width:140px;max-height:140px;display:block}.narrow-page>form{margin-top:25px}.narrow-page details>p{margin-top:10px}.image-viewer{position:fixed;inset:0;z-index:100;background:#342e26f5;color:#f8f4ed;display:flex;flex-direction:column}.image-viewer-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 24px;background:#342e26}.image-viewer-toolbar>span{font-size:14px}.image-viewer-toolbar>div{display:flex;align-items:center;gap:10px}.image-viewer-toolbar button{font-size:13px;color:#f8f4ed;background:#6e6254;border:0;min-height:39px;padding:8px 12px}.image-viewer-toolbar>div>span{font-size:13px;min-width:45px;text-align:center}.image-viewer-stage{overflow:auto;padding:25px;flex:1}.image-viewer-stage img{display:block;max-width:none;height:auto;margin:auto;background:#fffdf8}.auth-page{max-width:1050px;min-height:100svh;margin:auto;padding:55px 35px;display:grid;grid-template-columns:1fr 390px;gap:10vw;align-items:center}.brand-icon{width:50px;height:50px;fill:none;stroke:var(--primary);stroke-width:1.6}.auth-intro h1{font-size:34px;margin:23px 0 14px}.auth-intro p{font-size:15px;max-width:30ch;color:#6e6254;margin-bottom:12px}.auth-form{background:#fffdf8;padding:30px;border-radius:16px}.auth-form h2{font-size:22px;margin-bottom:22px}.auth-form p{font-size:12px;margin-bottom:15px}.auth-form .primary{margin-top:9px;min-height:45px}@media(min-width:1700px){.page{max-width:1230px}.study-workspace.with-ai{grid-template-columns:minmax(0,1fr) 390px}.practice-page{max-width:1400px}}@media(max-width:1250px){.workspace-shell{grid-template-columns:165px minmax(0,1fr)}.workspace-nav{padding:30px 12px 20px}.workspace-brand{font-size:17px;gap:7px;padding-inline:6px}.workspace-brand .app-icon{width:22px}.workspace-topbar{padding-inline:30px}.page{padding:30px}.global-messages{padding-inline:30px}.desk-start{grid-template-columns:1fr}.desk-today{border:0;border-top:1px solid #ddd5c7;padding:20px 0 0;gap:50px}.desk-today div{flex-direction:row;align-items:baseline;gap:12px}.desk-today strong{font-size:25px}.study-workspace.with-ai{grid-template-columns:minmax(0,1fr) 310px;gap:19px}.question-pane{padding:25px 23px}.question-chat{padding:22px 20px}.heatmap{grid-auto-columns:10px;grid-template-rows:repeat(7,10px);gap:4px}.heatmap button,.heatmap-blank{width:10px;height:10px;min-width:10px;min-height:10px}}@media(max-width:1000px){.workspace-shell{grid-template-columns:145px minmax(0,1fr)}.workspace-brand{font-size:15px;gap:6px}.workspace-brand .app-icon{width:20px}.workspace-nav nav button{font-size:14px;padding:12px}.desk-middle{grid-template-columns:1fr 1fr;gap:17px}.focus-panel,.exam-panel{padding:22px 20px}.timer-presets{flex-wrap:wrap;gap:6px}.custom-time{display:flex}.desk-saved{gap:17px}.study-workspace.with-ai{grid-template-columns:1fr;max-width:800px}.question-chat{padding:25px}.quick-search button{min-width:190px}.desk-start h2{font-size:20px}.section-heading h2{font-size:17px}.desk-today{gap:25px}.desk-today div{flex-direction:column;gap:5px}.heatmap{justify-content:start;gap:4px}.auth-page{gap:5vw;grid-template-columns:1fr 360px}.exam-count strong{font-size:57px}}@media(max-width:700px){.workspace-shell{display:block}.workspace-nav{position:fixed;inset:auto 0 0;height:auto;min-height:67px;border:0;border-top:1px solid #f0eadf;background:#fffdf8f5;padding:5px 15px calc(5px + env(safe-area-inset-bottom,0px));z-index:70}.workspace-brand,.nav-account{display:none}.workspace-nav nav{flex-direction:row;justify-content:space-around;gap:10px}.workspace-nav nav button{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:5px 15px;min-height:51px;gap:3px;font-size:12px;background:none!important;border-radius:8px;color:#6e6254}.workspace-nav nav button.active{color:var(--primary)}.workspace-nav nav .app-icon{width:22px;height:22px}.workspace-body{padding-bottom:calc(78px + env(safe-area-inset-bottom,0px))}.workspace-topbar{height:62px;padding:13px 21px;border:0;background:transparent;gap:14px}.workspace-topbar>span{font-size:13px;color:#6e6254}.quick-search{margin-left:auto}.quick-search button{min-width:0;padding:7px;min-height:34px;background:none;gap:0}.quick-search button span,.quick-search kbd{display:none}.quick-search .app-icon{width:20px;height:20px}.account-button{height:30px;width:30px;min-height:30px;font-size:14px}.page{padding:18px 21px 30px}.global-messages{padding-inline:21px}.global-messages p{font-size:13px}.desk-greeting{margin-bottom:23px;gap:10px}.desk-greeting p{font-size:12px;margin-bottom:5px}.desk-greeting h1{font-size:25px}.checkin-button{min-width:95px;min-height:36px;padding:8px 12px;font-size:12px}.desk-start{padding:23px 22px;gap:19px;border-radius:14px;margin-bottom:19px}.desk-start h2{font-size:18px;line-height:1.6}.desk-start p{font-size:12px;line-height:1.9;margin:7px 0 20px}.desk-start .primary{min-width:139px;min-height:42px;padding:10px 21px;font-size:14px}.desk-start .text-button{font-size:12px}.desk-today{padding-top:17px;gap:0;justify-content:space-between}.desk-today div{gap:5px}.desk-today strong{font-size:24px}.desk-today strong small,.desk-today span{font-size:12px}.desk-middle{grid-template-columns:1fr;gap:17px;margin-bottom:19px}.focus-panel{padding:22px 24px}.focus-panel .section-heading{margin-bottom:9px}.section-heading h2{font-size:17px}.section-heading>span,.section-heading p{font-size:12px}.timer-display{font-size:59px;margin-top:8px}.timer-caption{font-size:12px;margin-top:5px}.timer-presets{margin-top:17px;gap:9px}.timer-presets button{font-size:12px;min-height:34px}.timer-actions{margin-top:17px}.timer-actions button{min-height:39px;font-size:13px;padding:9px 25px}.exam-panel{padding:20px 23px;position:relative;min-height:150px}.exam-panel .section-heading{margin-bottom:13px}.exam-subject{font-size:14px;margin-top:0;max-width:65%;overflow-wrap:anywhere}.exam-count{position:absolute;right:24px;bottom:25px;margin:0;display:flex;gap:7px;align-items:baseline}.exam-count strong{font-size:45px}.exam-count span{font-size:12px;max-width:4em}.exam-panel>.subtle{font-size:12px}.exam-empty{padding:0}.exam-empty>p:first-child{font-size:15px}.exam-empty .subtle{font-size:12px;margin:5px 0 12px}.exam-empty button{font-size:12px;min-height:35px;margin-top:0;padding:8px 12px}.activity-panel{padding:21px 22px;border-radius:13px;margin-bottom:19px}.activity-panel .section-heading{margin-bottom:18px}.activity-streak{font-size:12px!important}.heatmap{grid-auto-columns:10px;grid-template-rows:repeat(7,10px);gap:4px}.heatmap button,.heatmap-blank{width:10px;height:10px;min-height:10px;min-width:10px}.heatmap-caption{font-size:12px;margin-top:13px;align-items:flex-start}.heatmap-caption>span{display:none}.desk-saved{gap:13px;margin-bottom:24px}.desk-saved>button{padding:17px 15px;gap:11px;border-radius:11px}.desk-saved .app-icon{width:21px;height:21px}.desk-saved strong{font-size:14px}.desk-saved small{font-size:12px;line-height:1.8;margin-top:4px}.desk-saved>button>span:last-child{display:none}.recent-list .section-heading{margin-bottom:8px}.recent-list h2{font-size:16px}.recent-list>button{padding:14px 0;font-size:12px}.recent-list strong{font-size:14px}.recent-list small{font-size:12px}.page-title{margin-bottom:23px;gap:12px}.page-title h1{font-size:25px}.page-title p{font-size:12px;margin-top:6px}.page-title>button{font-size:12px;padding:8px 10px;min-height:35px}.practice-setup{padding:23px 21px}.practice-setup h2{font-size:18px;margin-bottom:17px}.mode-grid{gap:10px;margin-bottom:22px}.mode-grid button{padding:14px 12px;min-height:82px}.mode-grid strong{font-size:15px}.mode-grid small{font-size:12px;line-height:1.8;margin-top:5px}.range-fields{grid-template-columns:1fr;gap:0}.range-fields label{margin-bottom:15px;font-size:12px}.range-fields select{font-size:14px;min-height:43px}.round-size{gap:7px;font-size:12px;margin-top:2px}.round-size>span{margin-right:5px}.round-size button{padding:7px 13px;font-size:12px}.advanced-options summary{font-size:12px}.advanced-options .form-grid{grid-template-columns:1fr}.start-round{font-size:15px;min-height:46px;margin-top:15px}.setup-footnote{font-size:12px}.practice-shortcuts{flex-wrap:wrap;gap:6px;padding-top:18px}.practice-shortcuts button{font-size:12px;padding:7px 1px;min-height:34px}.practice-shortcuts span{margin-left:4px}.practice-page{padding-top:16px}.practice-page>.page-title h1{font-size:19px}.practice-page>.page-title p{font-size:12px;max-width:25ch;line-height:1.9}.practice-page>.page-title button{font-size:12px;min-height:34px;white-space:nowrap}.question-pane{padding:21px 19px;border-radius:13px}.question-toolbar{padding-bottom:19px;gap:6px}.question-toolbar>.text-button{font-size:12px;padding:7px 0}.question-toolbar button{font-size:12px;min-height:32px;padding:7px 10px}.question-meta{font-size:12px;gap:8px;line-height:1.8;margin-bottom:17px}.question-stem{font-size:19px;line-height:1.85;margin-bottom:22px}.question-images{margin-bottom:23px}.question-images>button{padding:9px;max-height:360px}.question-images img{max-height:340px}.option{font-size:16px;padding:13px 14px;gap:12px;min-height:52px}.answer-controls{padding-top:20px}.answer-controls .checkbox{font-size:12px}.confidence-buttons button{font-size:12px;min-height:37px}.answer-feedback{margin-block:21px;padding-top:21px}.answer-feedback h3{font-size:16px}.answer-feedback p{font-size:13px;line-height:1.9}.answer-feedback .small{font-size:12px}.question-pane>label{font-size:13px}.question-pane textarea{font-size:15px}.note-section summary{font-size:13px}.note-section summary>span{font-size:12px}.note-section>label{font-size:12px}.note-section textarea{font-size:14px}.note-section button,.note-section .small{font-size:12px}.question-chat{padding:22px 21px}.chat-heading h2{font-size:19px}.chat-composer textarea{font-size:14px;min-height:105px}.chat-send-row button{min-height:41px}.chat-suggestions button{font-size:12px;min-height:36px}.related-details{padding:0 23px}.collection-tabs{gap:19px}.collection-tabs button{font-size:13px;padding-bottom:12px}.collection-search{gap:8px}.collection-search input{font-size:13px;min-height:43px}.collection-search button{font-size:12px;min-width:65px;padding:9px 13px}.search-help{font-size:12px;line-height:1.8}.collection-count{font-size:12px;margin:20px 0 9px}.collection-item{padding:20px 18px}.collection-item-top{font-size:12px;line-height:1.8;gap:8px}.collection-item-top>span{max-width:74%}.collection-item h2{font-size:16px;line-height:1.9}.collection-item-bottom{gap:8px;align-items:flex-end;flex-wrap:wrap;margin-top:16px}.collection-item-bottom>span{font-size:12px;flex:1}.collection-item-bottom button{font-size:12px;min-height:34px;padding:7px 9px}.note-snippet{font-size:12px}.my-page>.page-title .text-button{font-size:12px}.profile-section{padding:21px}.profile-section h2{font-size:18px}.profile-section p{font-size:12px}.profile-avatar{width:45px;height:45px;font-size:23px}.my-links{padding:0 21px}.my-links>button{min-height:60px;font-size:14px}.my-links>button>span:last-child{font-size:12px}.exam-edit{padding:22px}.exam-edit .subtle,.exam-edit label{font-size:12px}.narrow-page .form-grid{grid-template-columns:1fr}.narrow-page>p{font-size:13px}.narrow-page>h1{font-size:24px}.narrow-page label{font-size:13px}.narrow-page textarea{font-size:14px}.form-section h2{font-size:17px}.form-section p{font-size:13px}.image-viewer-toolbar{padding:12px 13px;gap:7px;flex-wrap:wrap}.image-viewer-toolbar button{font-size:12px;padding-inline:10px;min-height:38px}.image-viewer-toolbar>div{gap:6px}.image-viewer-stage{padding:18px}.auth-page{display:block;padding:55px 24px 35px;max-width:480px}.auth-intro{margin-bottom:28px}.auth-intro h1{font-size:29px;margin:17px 0 11px}.auth-intro p{font-size:14px;max-width:none}.auth-intro .brand-icon{width:39px;height:39px}.auth-form{padding:25px}.auth-form h2{font-size:21px}}@media(prefers-reduced-motion:no-preference){button{transition:background-color .15s ease,border-color .15s ease}.question-chat{animation:panel-in .18s ease-out}@keyframes panel-in{0%{opacity:.7;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}}.heatmap{position:relative;grid-auto-columns:24px;grid-template-rows:repeat(7,24px);gap:3px}.heatmap button,.heatmap-blank{width:24px;height:24px;min-width:24px;min-height:24px;border-radius:5px}.heatmap button{border:5px solid white}.heatmap-date{display:flex;flex-direction:row;align-items:center;gap:12px;font-size:12px;color:var(--muted);margin:15px 0 0}.heatmap-date input{width:155px;min-height:38px;font-size:12px;padding:7px 10px}@media(max-width:700px){.heatmap{justify-content:start}.heatmap-date{justify-content:space-between}.heatmap-date input{min-height:42px}}body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1{font-weight:650;letter-spacing:-.02em}h2,h3{font-weight:600}.workspace-brand,.workspace-nav nav button.active{font-weight:600}.desk-start h2,.desk-saved strong,.profile-section h2{font-weight:600}.question-stem{font-weight:500;line-height:1.75}.markdown-content,.markdown-content p{line-height:1.85}.markdown-content strong{font-weight:600}.timer-display{font-size:56px;font-weight:500;letter-spacing:-.035em;line-height:1.2}.desk-today strong{font-size:28px;font-weight:550;letter-spacing:-.025em}.exam-count strong{font-size:58px;font-weight:500;letter-spacing:-.035em}.primary,.checkin-button{font-weight:500}@media(max-width:700px){.timer-display{font-size:54px}.desk-today strong{font-size:25px}.exam-count strong{font-size:43px}.question-stem{font-size:19px}}.mobile-quiz-actions{display:none}@media(max-width:700px){.workspace-shell.is-practicing .workspace-nav,.workspace-shell.is-practicing .workspace-topbar{display:none}.workspace-shell.is-practicing .workspace-body{padding-bottom:calc(96px + env(safe-area-inset-bottom,0px))}.practice-page{padding:0 16px 24px}.practice-page>.page-title{position:sticky;top:0;z-index:25;background:#f5f1e8;margin:0 -16px 12px;padding:12px 17px;min-height:72px;align-items:center;border-bottom:1px solid #ddd5c7}.practice-page>.page-title h1{font-size:17px;font-weight:600}.practice-page>.page-title p{max-width:none;font-size:12px;line-height:1.5;margin-top:4px}.practice-page>.page-title>button{min-height:44px;padding:9px 12px;font-size:12px;flex-shrink:0}.question-pane{padding:17px 17px 22px}.question-toolbar{padding-bottom:14px;gap:10px}.question-toolbar button{min-height:44px;padding:10px 12px;font-size:13px}.question-toolbar>.text-button{font-size:13px;padding-left:0}.question-toolbar .inline-ai-toggle{display:none}.question-meta{font-size:12px;margin-bottom:14px}.question-stem{font-size:19px;line-height:1.8;margin-bottom:21px}.question-images>button{min-height:44px;position:relative}.question-images>button:after{content:"点图放大";position:absolute;right:8px;bottom:6px;padding:2px 5px;background:#fffdf8e8;font-size:10px;color:#6e6254;border-radius:4px;pointer-events:none}.option{min-height:58px;font-size:17px;line-height:1.65;padding:14px}.option-letter{width:23px;min-height:26px}.confidence-buttons button{min-height:44px;font-size:13px}.answer-controls>.primary.full,.answer-controls .inline-reveal,.question-pane>button.primary.full,.desktop-review-return{display:none}.question-pane textarea,.chat-composer textarea{font-size:16px}.reference-answer .button-row button{min-height:46px;font-size:14px}.reference-answer .button-row{gap:9px}.note-section summary{min-height:48px;font-size:14px}.note-section .button-row button{min-height:44px;font-size:14px}.mobile-quiz-actions{position:fixed;left:0;right:0;z-index:60;display:grid;grid-template-columns:minmax(95px,.75fr) minmax(0,1.6fr);gap:11px;padding:12px 17px calc(12px + env(safe-area-inset-bottom,0px));background:#fffdf8;border-top:1px solid #f0eadf;min-height:77px}.mobile-quiz-actions button{min-height:49px;padding:12px 15px;font-size:16px;border-radius:11px}.mobile-quiz-actions .mobile-ask-ai{color:#48664b;border-color:#ddd5c7;white-space:normal}.mobile-quiz-actions .mobile-ask-ai:disabled{font-size:12px;color:#6e6254}.mobile-quiz-actions.is-empty-round{grid-template-columns:1fr}.is-mobile-chat{position:fixed;inset:auto 0 0;top:var(--chat-top,0px);height:var(--chat-height,100dvh);max-height:100dvh;z-index:90;border-radius:0;padding:0;display:flex;flex-direction:column;min-height:0;background:#fffdf8;animation:none}.is-mobile-chat .chat-heading{flex:none;min-height:71px;padding:calc(12px + env(safe-area-inset-top,0px)) 18px 11px;border-bottom:1px solid #f0eadf;gap:12px}.is-mobile-chat .chat-heading h2{font-size:18px;font-weight:600;line-height:1.4}.is-mobile-chat .chat-heading>div{min-width:0;flex:1}.chat-item-progress{display:block;font-size:12px;color:#6e6254;margin-top:3px;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.is-mobile-chat .chat-close{border:1px solid #f0eadf;background:#f8f4ed;color:#48664b;min-height:44px;padding:10px 13px;font-size:14px;white-space:nowrap}.chat-question-bar{flex:none;display:flex;align-items:center;gap:12px;background:#f8f4ed;padding:9px 18px;border-bottom:1px solid #f0eadf;min-height:57px}.chat-question-bar>span{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:12px;color:#6e6254;line-height:1.6;flex:1;overflow-wrap:anywhere}.chat-question-bar button{flex:none;min-height:44px;border:0;background:none;color:#48664b;padding:9px 2px;font-size:13px}.is-mobile-chat .chat-reading{flex:1;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;min-height:0;padding:18px 20px 22px;scroll-padding-bottom:15px}.chat-question-reference{padding:16px;background:#f8f4ed;border-radius:10px;margin-bottom:20px}.chat-question-reference>p{font-size:15px;line-height:1.8;margin:0 0 12px;white-space:pre-wrap;overflow-wrap:anywhere}.chat-reference-images{display:flex;flex-direction:column;gap:10px;margin:12px 0}.chat-reference-images button{padding:8px;min-height:48px;background:#fffdf8;border-color:#f0eadf}.chat-reference-images img{display:block;max-width:100%;max-height:340px;margin:auto;object-fit:contain}.is-mobile-chat .chat-intro{margin:0 0 14px;font-size:13px}.is-mobile-chat .chat-suggestions{gap:8px;margin-bottom:18px}.is-mobile-chat .chat-suggestions button{min-height:44px;font-size:13px;padding:10px 12px}.is-mobile-chat .chat-turn{margin-top:20px;padding-bottom:18px}.is-mobile-chat .chat-section-head{font-size:12px}.is-mobile-chat .chat-section-head button{min-height:44px;font-size:12px;padding:8px}.is-mobile-chat .student-message p{font-size:16px;line-height:1.75}.is-mobile-chat .markdown-content{font-size:16px;line-height:1.85}.is-mobile-chat .chat-composer{flex:none;background:#fffdf8;padding:13px 17px calc(12px + env(safe-area-inset-bottom,0px));border-top:1px solid #f0eadf;margin:0}.is-mobile-chat .chat-composer label{font-size:12px;margin:0 0 7px;color:#6e6254}.is-mobile-chat .chat-composer textarea{font-size:16px;line-height:1.55;min-height:66px;max-height:125px;resize:none;padding:10px 12px;background:#f8f4ed}.is-mobile-chat .chat-send-row{margin-top:9px;justify-content:space-between;gap:10px}.is-mobile-chat .chat-send-row>span{font-size:11px;max-width:180px;line-height:1.7}.is-mobile-chat .chat-send-row button{min-height:44px;min-width:96px;font-size:14px;padding:10px 15px}.is-mobile-chat .chat-working{font-size:13px;padding:12px 0;line-height:1.7}.is-mobile-chat .saved-explanation{padding-top:17px;margin-top:18px}.is-mobile-chat .secondary.full{min-height:46px;font-size:14px}.is-compact-chat .chat-heading{min-height:56px;padding-top:8px;padding-bottom:8px}.is-compact-chat .chat-item-progress{display:none}.is-compact-chat .chat-question-bar{min-height:45px;padding-top:0;padding-bottom:0}.is-compact-chat .chat-question-bar>span{-webkit-line-clamp:1}.is-compact-chat .chat-composer{padding-top:8px;padding-bottom:8px}.is-compact-chat .chat-composer label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.is-compact-chat .chat-composer textarea{min-height:55px;height:55px}.is-compact-chat .chat-send-row{margin-top:6px}.image-viewer{z-index:110}}:root{--mobile-nav-height:74px;--safe-bottom:env(safe-area-inset-bottom,0px);--muted:#6e6254}.nav-account{font-size:15px;color:#625747}.nav-account button{color:#625747;min-width:44px;min-height:44px}.workspace-topbar>span,.practice-shortcuts button,.section-heading>span,.section-heading p,.subtle,.auth-form p,.auth-intro p,.setup-footnote,.question-meta,.page-title p,.desk-start p,.heatmap-caption,.desk-saved small,.search-help,.collection-count,.collection-item-top,.collection-item-bottom>span,.recent-list small{font-size:14px;color:#625747}.practice-shortcuts button{font-weight:500;text-decoration:underline;text-underline-offset:4px}.options,.question-pane>label{scroll-margin-top:92px}.heatmap-cell{border-color:#fffdf8}.heat-level-0{background:#ece5d8}.heat-level-1{background:#cbd6bd}.heat-level-2{background:#a6bc92}.heat-level-3{background:#779263}.heat-level-4{background:#48664b}.image-viewer{background:#eee7db;color:#342e26}.image-viewer-toolbar{background:#fffdf8;border-bottom:1px solid #ddd5c7;color:#342e26}.image-viewer-toolbar button{background:#f0eadf;color:#342e26;border:1px solid #cfc4b3;min-height:44px;font-size:14px}.image-viewer-toolbar>span{font-size:16px;font-weight:600}.image-viewer-stage{overscroll-behavior:contain;touch-action:pan-x pan-y pinch-zoom}.image-reader-footer{flex:none;background:#fffdf8;border-top:1px solid #ddd5c7;padding:13px 20px calc(13px + var(--safe-bottom));text-align:center}.image-reader-footer p{font-size:14px;color:#625747;margin:0 auto 10px}.image-reader-footer>.primary{min-height:48px;width:min(100%,420px);font-size:16px}.image-reader-pages{display:flex;gap:16px;align-items:center;justify-content:center;margin-bottom:10px;font-size:14px}.image-reader-pages button{min-height:44px;font-size:14px}.image-viewer-toolbar.complete-reader-toolbar{display:block;padding:10px 14px}.complete-reader-toolbar>.image-reader-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:6px}.complete-reader-toolbar>.image-reader-heading>span{font-size:16px;font-weight:600}.image-reader-heading small{font-size:14px;font-weight:400;color:#625747}.complete-reader-toolbar>.image-reader-zoom{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.image-reader-zoom button{padding:8px 12px;min-width:44px;min-height:44px}.image-zoom-state{font-size:13px;color:#625747;min-width:55px;text-align:center}.image-viewer-stage.complete-reading-stage{padding:12px;overflow-x:hidden;overflow-y:auto;scrollbar-gutter:stable}.complete-reading-stage.is-zoomed{overflow-x:auto}.image-reader-page{margin:0 auto 16px;max-width:none;flex-shrink:0}.image-reader-page figcaption{font-size:13px;color:#625747;padding:0 0 7px}.image-viewer-stage .image-reader-page img{display:block;width:100%;height:auto;max-width:none;margin:0;background:#fff}.reader-page-loading{display:grid;place-items:center;background:#fffdf8;color:#625747;font-size:14px}.reader-page-error{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:140px;padding:20px;background:#fffdf8;color:#625747;font-size:14px}.reader-page-error p{margin:0}.reader-page-error button{min-height:44px;font-size:14px}.auth-page{max-width:1120px;grid-template-columns:minmax(0,1fr) 400px;gap:65px}.auth-intro p{max-width:40ch;line-height:1.9}.auth-intro h1{font-size:36px}.nav-account,.practice-shortcuts button,.search-help,.collection-count,.collection-item-top,.collection-item-bottom>span,.question-meta,.chat-section-head,.chat-intro,.timer-caption,.desk-saved small,.heatmap-caption{color:#6e6254}.workspace-body small,.workspace-body .subtle,.workspace-body .muted{color:#6e6254}.timer-presets{flex-wrap:wrap}.custom-time{flex-basis:100%;justify-content:center;gap:9px;color:#6e6254;font-size:14px;margin-top:7px}.custom-time input{color:#342e26;background:#fffdf8;border:1px solid #a79a85;width:80px;font-size:16px;font-weight:500;min-height:44px}.practice-shortcuts button{font-size:15px;min-height:44px}.heatmap-cell{display:block;width:24px;height:24px;min-width:24px;min-height:24px;border:5px solid #fffdf8;border-radius:5px;cursor:pointer}.chat-reference-images .question-image-frame{width:100%;max-height:none}@media(min-width:1100px){.workspace-shell{grid-template-columns:176px minmax(0,1fr)}.workspace-nav{padding-inline:14px}.workspace-body>.page{padding-inline:24px}.question-pane.has-question-image{display:block;padding:24px}.question-pane.has-question-image>.question-images{position:static;display:flex;flex-direction:column;max-height:none;overflow:visible;padding:0}.question-pane.has-question-image .options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.study-workspace:has(.has-question-image){max-width:1100px}.study-workspace.with-ai:has(.has-question-image){grid-template-columns:minmax(0,1fr);max-width:1100px}.study-workspace.with-ai:has(.has-question-image)>.question-chat{max-width:850px;margin-left:auto;width:100%}}@media(max-width:700px){.auth-form input,.workspace-body input:not([type=checkbox]),.workspace-body select{font-size:16px}.workspace-nav{background:#fffdf8!important;opacity:1;height:calc(var(--mobile-nav-height) + var(--safe-bottom));min-height:calc(var(--mobile-nav-height) + var(--safe-bottom));padding:7px 15px calc(7px + var(--safe-bottom));isolation:isolate}.workspace-nav nav{min-height:58px}.workspace-nav nav button{min-height:56px;font-size:13px;color:#6e6254}.workspace-body{padding-bottom:calc(var(--mobile-nav-height) + var(--safe-bottom) + 24px)}.workspace-shell.is-practicing .workspace-body{padding-bottom:calc(94px + var(--safe-bottom))}.mobile-quiz-actions{background:#fffdf8;isolation:isolate}.workspace-body .small,.workspace-body small,.search-help,.setup-footnote,.question-meta,.collection-count,.collection-item-top,.collection-item-bottom>span,.recent-list small,.desk-today span,.desk-today strong small,.timer-caption,.heatmap-caption,.desk-saved small{font-size:13px}.practice-shortcuts button{font-size:15px}.mode-grid small{font-size:12px;color:#6e6254}.chat-send-row>span,.is-mobile-chat .chat-send-row>span{font-size:12px;color:#6e6254}.chat-close,.chat-item-progress,.chat-question-bar>span{color:#6e6254}.custom-time{display:flex;font-size:14px}.auth-page{display:block;padding:45px 24px 30px;max-width:500px}.auth-intro h1{font-size:30px}.auth-intro p{max-width:none}.question-images>button:after{display:none}.workspace-body .subtle,.workspace-body .muted,.workspace-body .small,.workspace-body small,.search-help,.setup-footnote,.question-meta,.collection-count,.collection-item-top,.collection-item-bottom>span,.recent-list small,.desk-today span,.desk-today strong small,.timer-caption,.heatmap-caption,.desk-saved small,.practice-page>.page-title p,.section-heading>span,.section-heading p,.desk-start p,.range-fields label,.advanced-options summary{font-size:14px;color:#625747}.mode-grid small,.chat-send-row>span,.is-mobile-chat .chat-send-row>span{font-size:13px;color:#625747}.image-viewer-toolbar{padding:10px 13px}.image-viewer-toolbar>div{flex-wrap:wrap}.image-reader-footer{padding-inline:15px}.image-zoom-state{display:none}.complete-reader-toolbar>.image-reader-zoom{gap:6px}.image-reader-zoom button{font-size:14px;padding-inline:10px}.image-reader-heading small{font-size:14px}}.question-image-frame[data-v-eab47825]{position:relative;width:100%;overflow:hidden;border:1px solid #f0eadf;border-radius:10px;background:#f8f4ed;flex-shrink:0}.question-image-frame.is-wide[data-v-eab47825]{min-height:88px}.question-image-scroll[data-v-eab47825]{position:absolute;inset:0;overflow:hidden}.is-readable .question-image-scroll[data-v-eab47825]{overflow:hidden}.is-readable[data-v-eab47825]{min-height:72px}.question-image-open[data-v-eab47825]{position:absolute;inset:0;padding:0;width:100%;height:100%;max-height:none;border:0;border-radius:0;display:block;background:#fffdf8;min-height:0;opacity:1}.question-image-open[data-v-eab47825]:disabled{opacity:1}.question-image-open img[data-v-eab47825]{position:absolute;inset:0;display:block;width:100%;height:100%;max-height:none;max-width:none;object-fit:contain;opacity:0;margin:0}.question-image-open img.decoded[data-v-eab47825]{opacity:1}.question-image-skeleton[data-v-eab47825]{position:absolute;inset:0;display:grid;place-items:center;background:#f8f4ed;color:#6e6254;font-size:13px}.image-open-hint[data-v-eab47825]{position:absolute;right:8px;bottom:7px;padding:3px 6px;color:#6e6254;font-size:12px;background:#fffdf8f0;border-radius:5px;pointer-events:none}.question-image-error[data-v-eab47825]{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;background:#f8f4ed;color:#6e6254;font-size:14px}.question-image-error button[data-v-eab47825]{min-height:44px;font-size:14px;color:#48664b;border-color:#ddd5c7}@media(prefers-reduced-motion:no-preference){.question-image-skeleton[data-v-eab47825]{animation:loading-pulse-eab47825 1.5s ease-in-out infinite}@keyframes loading-pulse-eab47825{50%{background:#f0eadf}}}
