:root{--bg:#f7f8f5;--paper:#fff;--ink:#223b33;--text:#37443f;--muted:#8b958f;--line:#e4e9e3;--green:#35624f;--light:#eef3ec;--amber:#b57b2a;--amber-bg:#fbf4e7;--radius:12px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-size:14px}button,input,select,textarea{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer;transition:.15s}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[contenteditable]:focus-visible{outline:3px solid #83af98;outline-offset:3px}button{border:0}button:hover:not(:disabled){filter:brightness(.97)}a{text-decoration:none;color:inherit}[hidden]{display:none!important}.muted{color:var(--muted)}.small{font-size:12px;line-height:1.7}
.sidebar{position:fixed;inset:0 auto 0 0;width:230px;background:#f0f3ed;border-right:1px solid #e2e8dd;display:flex;flex-direction:column;padding:31px 20px;z-index:5}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:23px;font-weight:650;letter-spacing:1px}.brand-mark{background:var(--green);color:white;width:40px;height:44px;border-radius:9px;display:grid;place-items:center;font-family:serif;font-size:27px;font-weight:400}.brand small{display:block;font-size:10px;font-weight:400;letter-spacing:1px;margin-top:3px;color:#7d8b81}.version{font-size:8px;background:#e1e9dd;color:#70816d;padding:4px;border-radius:3px;align-self:flex-start;margin:4px 0 0 -2px;letter-spacing:1px}.new-task{margin:36px 0 30px;padding:13px 17px;border-radius:7px;background:var(--green);color:white;text-align:left;font-size:13px;display:flex;gap:15px;align-items:center}.new-task span{font-size:21px;line-height:10px}.nav-label{font-size:11px;color:#8b988c;letter-spacing:.5px;padding:0 10px;display:flex;justify-content:space-between}#history{overflow:auto;flex:1;margin-top:13px}.history-item{display:flex;flex-direction:column;gap:6px;align-items:flex-start;padding:13px 10px;border-radius:7px;background:transparent;width:100%;text-align:left;margin-bottom:3px;color:#627065}.history-item.active{background:#e2eadd;color:var(--ink)}.history-item strong{font-weight:500;font-size:12px;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-item small{font-size:10px;color:#92a08e}.sidebar-bottom{border-top:1px solid #dae3d5;padding:22px 10px 0;font-size:11px;color:#5a705d}.sidebar-bottom p{font-size:10px;line-height:1.9;color:#8d9a87}.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#6f9578;margin-right:7px}.link{padding:5px 0;background:none;color:var(--green);font-size:12px}.sidebar-bottom .link{font-size:10px}main{margin-left:230px}.topbar{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 46px;border-bottom:1px solid var(--line);background:#fbfcf9}.breadcrumb{font-size:12px;color:#96a094;display:flex;gap:17px}.breadcrumb strong{font-weight:400;color:#506552;max-width:480px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.local-pill{font-size:11px;border:1px solid #dce6d5;border-radius:20px;padding:7px 12px;color:#6f8768}
.welcome{max-width:1170px;padding:62px 66px 34px;margin:0 auto;display:grid;grid-template-columns:1fr 1.17fr;gap:55px 48px;align-items:center}.intro{align-self:start;padding-top:38px}.eyebrow{font-size:10px;letter-spacing:2px;color:#8a9a84;margin-bottom:19px}.intro h1{font-size:42px;line-height:1.45;font-weight:550;letter-spacing:-1.5px;margin:0;color:#263e31}.intro h1 span{color:#658668}.intro p{margin-top:26px;line-height:2.1;font-size:13px;color:#98a18f}.upload-panel{background:white;border:1px solid #e3e8de;border-radius:var(--radius);padding:27px;box-shadow:0 10px 40px #425b3e05}.panel-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:23px}.panel-title h2{margin:0;font-size:15px;font-weight:600}.panel-title>span{font-size:9px;color:#a9b3a1;letter-spacing:1px}.dropzone{border:1.5px dashed #c9d5bf;border-radius:9px;background:#fafcf8;display:flex;align-items:center;flex-direction:column;padding:26px 12px 25px;cursor:pointer}.dropzone.dragover{border-color:var(--green);background:#edf5e9}.dropzone strong{font-weight:500;font-size:12px;margin-top:20px;word-break:break-all;text-align:center}.dropzone>span{font-size:10px;color:#a4af9b;margin-top:9px}.file-art{position:relative;width:64px;height:62px;isolation:isolate}.sheet-front,.sheet-back{position:absolute;display:block;width:40px;height:51px;left:11px;top:4px;background:white;border:1px solid #bdceb1;border-radius:4px}.sheet-back{transform:rotate(-13deg);left:2px;top:2px;background:#edf3e7}.sheet-front{padding:11px 6px;color:#7e986a;font-size:10px;letter-spacing:1px;font-weight:650}.sheet-front span{display:block;font-size:6px;letter-spacing:0;border-top:1px solid #dbe6d3;padding-top:8px;margin-top:5px}.file-art b{position:absolute;width:23px;height:23px;display:grid;place-items:center;background:#3d664b;border:3px solid #fafcf8;border-radius:50%;color:white;right:0;bottom:0;font-size:11px}.upload-options{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:16px}label{font-size:11px;color:#7d8a76;display:block}input:not([type=checkbox]),select,textarea{width:100%;padding:10px 11px;border:1px solid #e0e6da;border-radius:6px;color:#4c6046;background:#fff;font-size:12px;outline:none;line-height:1.5}label input,label select{margin-top:7px}input::placeholder{color:#b2bba9;font-size:11px}.primary{background:var(--green);color:white;border:1px solid var(--green);padding:11px 18px;border-radius:7px;font-size:12px;font-weight:500;display:inline-flex;gap:17px;justify-content:center;align-items:center}.secondary{background:white;color:#51684b;border:1px solid #dce5d5;padding:10px 15px;border-radius:7px;font-size:12px}.full{width:100%;margin-top:22px;padding:13px}.upload-note{font-size:9px;text-align:center;color:#a4b196;margin-top:14px;line-height:1.8}.upload-note span{margin-right:3px;font-size:10px}.engine-status{font-size:9px;color:#92a087;border-top:1px solid #f0f3ed;padding-top:13px;margin-top:17px;text-align:center}.feature-row{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);gap:35px;border-top:1px solid var(--line);padding-top:30px}.feature-row>div{display:grid;grid-template-columns:24px 1fr;column-gap:13px}.feature-row span{font-family:serif;color:#a2b292;font-size:13px;grid-row:span 2;padding-top:2px}.feature-row strong{font-weight:500;font-size:12px;color:#58724e}.feature-row p{color:#a2ae98;font-size:10px;margin:9px 0 0}
#workspace{padding:29px 28px 24px}.work-heading{display:flex;justify-content:space-between;align-items:center;gap:22px}.work-heading .eyebrow{margin-bottom:10px}.work-heading h1{font-size:20px;font-weight:550;margin:0;color:var(--ink);max-width:630px;overflow-wrap:anywhere}.work-heading p{font-size:11px;color:#91a087;line-height:1.7;margin:8px 0}.work-actions{display:flex;align-items:center;gap:9px;flex-shrink:0}#saveState{font-size:10px;color:#9da996;margin-right:4px}.review-toolbar{display:flex;align-items:center;gap:16px;margin:21px 0 15px}.page-controls{display:flex;align-items:center;gap:8px}.page-controls select{width:124px;padding:7px;font-size:11px}.icon-button{background:transparent;color:#718665;font-size:23px;width:20px}.stats{display:flex;gap:13px;font-size:10px;color:#97a28d}.stats strong{font-weight:550;color:#587249}.filter-check{margin-left:auto;display:flex;align-items:center;gap:6px;font-size:10px}.review-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px;align-items:start}.source-panel,.editor-panel{border:1px solid #e0e7da;background:white;border-radius:9px;overflow:hidden;min-width:0}.pane-title{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:14px 15px;border-bottom:1px solid #e8ede3;height:52px}.pane-title strong{font-weight:550;font-size:12px}.pane-title strong span{font-weight:400;font-size:9px;margin-left:10px;color:#a4ae99}.pane-title>div{display:flex;gap:8px}.small-button{font-size:9px;color:#768d68;background:#f6f8f3;padding:6px 8px;border-radius:4px}.paper-tag{font-size:9px;border:1px solid #e5ebdf;padding:4px 7px;border-radius:4px;color:#a2ad96}.source-scroll,.blocks{height:calc(100vh - 336px);min-height:440px;overflow-y:auto;overscroll-behavior:contain}.source-scroll{padding:19px;background:#eef1e9}.source-canvas{position:relative;touch-action:pan-y;line-height:0;box-shadow:0 2px 9px #354b2510}.source-canvas img{width:100%;user-select:none}.source-highlight,.crop-rect{position:absolute;pointer-events:none;border:2px solid #71955c;background:#8cad6030;border-radius:3px}.crop-rect{border:2px dashed #ca943a;background:#e9c77e35}.source-canvas.cropping{cursor:crosshair;touch-action:none}.crop-hint{font-size:11px;padding:11px;background:#fcf1db;color:#966a23;line-height:1.7}.pane-foot{font-size:9px;color:#a5ae9c;padding:12px 15px;border-top:1px solid #e8ede3;background:#fdfefa;line-height:1.7}.blocks{padding:24px 23px;background:#fff}.block{position:relative;padding:13px 10px 15px;border:1px solid transparent;border-bottom-color:#edf0e9;border-radius:5px;margin-bottom:3px;color:#344631;font-family:"Songti SC","SimSun",serif;line-height:1.9;font-size:15px;cursor:text;overflow-wrap:anywhere}.block.active{background:#f7faf4;border-color:#dbe8cf}.block.excluded{opacity:.35;background:#f3f3f3}.block-bar{display:flex;align-items:center;justify-content:space-between;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;font-size:9px;color:#a2ad9a;line-height:1.3;margin-bottom:8px;opacity:.65}.block:hover .block-bar,.block.active .block-bar{opacity:1}.block-bar>div{display:flex;gap:7px;align-items:center}.block-bar button{padding:2px 4px;background:none;font-size:10px;color:#8d9e80}.block-bar select{width:auto;font-size:9px;padding:1px 2px;border:none;background:none;color:#829575}.text-edit{white-space:pre-wrap;outline:none;min-width:8px;display:inline;line-height:1.9}.text-edit:focus{background:#e9f2e1;border-radius:2px}.formula-chip{display:inline-block;vertical-align:middle;max-width:100%;margin:4px 3px;border:1px solid #e0e9d8;background:#f3f8ee;border-radius:5px;padding:4px 8px;color:#375e32;cursor:pointer;overflow-x:auto;line-height:1.5}.formula-chip.image-mode{background:var(--amber-bg);border-color:#ead9b5}.formula-chip img{max-height:75px;max-width:100%;display:block;mix-blend-mode:multiply}.formula-chip small{font:8px -apple-system,sans-serif;display:block;color:#75915f;margin-top:3px;text-align:right}.formula-chip.image-mode small{color:#b78a48}.formula-block{text-align:center}.block.heading .text-edit{font-size:19px;font-weight:bold}.figure-image{display:block;max-width:100%;max-height:330px;margin:10px auto;cursor:pointer}.block-warning{font:9px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;color:#b1915b;margin-top:6px}.block table{border-collapse:collapse;font-size:12px;width:100%;overflow-wrap:anywhere;table-layout:fixed}.block td{border:1px solid #dbe3d5;padding:6px;min-width:40px}.block td textarea{border:none;padding:0;color:var(--ink);resize:vertical;font-family:inherit;min-height:45px}.page-warnings{background:#fbf3e5;padding:12px 16px;color:#ab813b;font-size:11px;line-height:1.8;margin-bottom:15px;border-radius:6px}.progress-box{background:#edf3e7;padding:20px;border-radius:8px;margin:20px 0}.progress-box>div:first-child{display:flex;gap:10px;font-size:12px;align-items:center}.progress-box strong{font-weight:500}.progress-box p{font-size:10px;color:#9aa88d;margin:10px 0 0}#progressPercent{margin-left:auto;color:#779165}.progress-track{height:4px;background:#dce7d2;border-radius:10px;margin-top:15px}.progress-track>div{height:4px;background:#72965f;border-radius:10px;transition:width .4s}.spinner{width:12px;height:12px;border:2px solid #bdceb0;border-top-color:#507846;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
dialog{border:1px solid #e1e8d9;border-radius:14px;padding:28px;max-width:580px;width:calc(100vw - 44px);color:var(--text);box-shadow:0 25px 100px #162b2940}dialog::backdrop{background:#1b30284a;backdrop-filter:blur(3px)}.dialog-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:20px}.dialog-head h2{font-size:20px;font-weight:550;margin:0}.dialog-head .eyebrow{margin-bottom:10px}.close{background:none;color:#9aa891;font-size:27px;padding:0;line-height:1}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;border-top:1px solid var(--line);padding-top:20px;margin-top:20px}.formula-dialog{max-width:870px}.formula-columns{display:grid;grid-template-columns:1fr 1.2fr;gap:26px}.section-label{font-size:10px;color:#8b9d7d;margin:12px 0}.formula-original,.formula-preview{background:#f6f8f1;border:1px solid #e5ecdc;border-radius:7px;padding:20px;min-height:110px;display:flex;align-items:center;justify-content:center;overflow:auto}.formula-original img{max-width:100%;max-height:200px;mix-blend-mode:multiply}.formula-preview{background:white;font-size:22px}.formula-tools{display:flex;gap:7px;margin-top:10px}.formula-tools button{font-size:10px;padding:7px 9px}#latexInput{font-family:ui-monospace,SFMono-Regular,monospace;color:#536b47}.formula-warning{font-size:11px;color:#af8a49;background:#fcf6ea;padding:12px;border-radius:5px;line-height:1.8}.style-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin-top:25px}.about-copy{line-height:1.95;font-size:12px;color:#74856a}.toast{position:fixed;bottom:27px;left:50%;transform:translateX(-50%);padding:14px 24px;background:#2a4936;color:white;border-radius:8px;font-size:12px;box-shadow:0 10px 30px #17291925;z-index:99;max-width:80vw;line-height:1.7}.empty-editor{color:#a0ad93;text-align:center;line-height:2;font-size:12px;padding:55px 10px}math{font-size:1.05em} .error{color:#aa4b3b!important}
@media(min-width:1550px){.welcome{padding-top:95px}.intro h1{font-size:48px}.upload-panel{padding:32px}.dropzone{padding:35px}.source-scroll,.blocks{height:calc(100vh - 315px)}}@media(max-width:1180px){.sidebar{width:195px;padding:27px 14px}main{margin-left:195px}.welcome{padding:42px 32px;gap:30px}.intro h1{font-size:34px}.upload-panel{padding:20px}.work-heading{align-items:flex-start}.work-actions{flex-wrap:wrap;justify-content:flex-end;max-width:230px}.work-heading h1{font-size:17px}.stats{gap:7px}.pane-title{height:auto;min-height:52px;flex-wrap:wrap}.pane-title strong span{display:none}.review-grid{gap:10px}.blocks{padding:13px}.topbar{padding:0 30px}.source-scroll{padding:12px}}@media(max-width:850px){.sidebar{width:68px;padding:20px 10px}.brand{justify-content:center}.brand>span:not(.brand-mark),.nav-label,#history,.sidebar-bottom{display:none}.brand-mark{font-size:25px}.new-task{font-size:0;padding:12px;justify-content:center}.new-task span{font-size:22px}main{margin-left:68px}.welcome{grid-template-columns:1fr;padding:35px 22px;max-width:620px}.intro{padding-top:0}.intro h1{font-size:33px}.intro h1 br{display:none}.intro p{margin-top:14px}.feature-row{gap:10px}.feature-row>div{display:block}.feature-row span{display:none}.topbar{padding:0 23px;height:66px}.breadcrumb{max-width:70%;gap:8px}.review-grid{grid-template-columns:1fr}.source-scroll{height:390px;min-height:0}.blocks{height:550px;min-height:0}#workspace{padding:25px 15px}.work-heading{flex-direction:column}.work-actions{max-width:none;width:100%;justify-content:flex-start}.work-heading h1{max-width:100%}.review-toolbar{flex-wrap:wrap}.stats{font-size:9px}.filter-check{margin-left:0}.formula-columns{grid-template-columns:1fr}.formula-dialog{max-height:90vh}.formula-original{min-height:60px}.formula-original img{max-height:80px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

.tier-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:20px 0 8px}.tier-options label{display:flex;align-items:flex-start;gap:8px;border:1px solid var(--line);padding:14px 10px;border-radius:8px;cursor:pointer}.tier-options label:has(input:checked){border-color:var(--green);background:var(--light)}.tier-options input{accent-color:var(--green);margin-top:3px}.tier-options strong{display:block;font-size:12px}.tier-options b{font-size:11px;color:var(--green);padding-left:5px}.tier-options small{display:block;font-size:10px;color:#7e887d;margin-top:7px;line-height:1.6}.quote-panel{background:white;border:1px solid var(--line);border-radius:12px;padding:32px;max-width:800px;margin:24px auto}.quote-amount{font-size:36px;color:var(--green);font-weight:650;margin:22px 0}.quote-amount small{display:block;font-size:13px;font-weight:400;color:#778474;margin-top:10px}.consent-label{display:flex;gap:9px;line-height:1.8;margin-top:22px}.quote-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}@media(max-width:520px){.tier-options{grid-template-columns:1fr}.quote-panel{padding:20px}.quote-actions>*{width:100%}}

#manualText{width:100%;border:1px solid var(--line);padding:12px;border-radius:8px;resize:vertical}.pane-title>div{display:flex;gap:3px;flex-wrap:wrap;justify-content:flex-end}

/* Continuous exam preview; editing controls appear on focus or selection. */
.blocks{padding:28px 25px}.block{font-family:"Times New Roman","Songti SC",serif;font-size:var(--exam-size,15px);line-height:var(--exam-leading,1.25);padding:4px 5px;margin:0 0 var(--paragraph-gap,5px);border-color:transparent;overflow-wrap:normal}.block-content{display:flow-root;min-height:1em}.block-bar{position:absolute;z-index:3;left:0;right:0;top:-22px;height:23px;margin:0;background:#f2f6ef;border:1px solid #dce6d5;border-radius:4px;padding:3px 6px;opacity:0;pointer-events:none}.block:hover .block-bar,.block.active .block-bar,.block:focus-within .block-bar{opacity:1;pointer-events:auto}.block:hover{border-color:#e7eddf}.block.active{border-color:#dbe8cf}.block-warning{display:none}.block.active .block-warning{display:block;font-size:9px}.text-edit{line-height:inherit}.block.heading .text-edit{font-size:1.1em}.block.role-title .text-edit{font-size:1.35em}.role-question{margin-top:var(--question-gap,23px);border-top:1px solid #dfe7db;border-radius:0;padding-top:9px}.role-source_id{font-size:.72em;color:#85917f;margin-bottom:10px}.centered{text-align:center}.formula-chip{font-family:inherit;font-size:inherit;vertical-align:baseline;position:relative;overflow:visible;max-width:100%;margin:0 1px;padding:0 1px;border:0;border-bottom:1px solid #a6b697;border-radius:2px;background:transparent;line-height:1}.formula-chip.image-mode{background:#fcf7ec;border:0;border-bottom:1px solid #dcc391}.formula-chip img{display:inline-block;vertical-align:-.16em;max-height:none;max-width:100%;object-fit:contain;width:auto}.formula-chip small{display:none;position:absolute;right:0;top:-20px;white-space:nowrap;background:#fff;padding:3px;box-shadow:0 1px 6px #0001;z-index:4}.formula-chip:hover small,.formula-chip:focus-visible small{display:block}.formula-block{padding:2px 0}.formula-block .formula-chip img{vertical-align:middle}.exam-marks{float:right;font-size:.75em;margin-left:12px;min-width:20px;text-align:right;font-weight:normal}.block.role-question .exam-marks{font-size:.7em}.block-content math{font-size:1em}.blocks:has(.role-question)>.block:first-child{margin-top:0}
.block.role-subtitle{font-size:.83em}.role-answer_heading{margin-top:var(--question-gap,23px)}

.speed-hint{font-size:12px;line-height:1.6;color:#526f44;font-weight:550;margin:12px 0 3px}.compatibility-note{font-size:10px;color:#8b9d80;margin:8px 0}.upload-note{margin-top:5px}.progress-box #progressTime{color:#5a734d;font-size:11px}
.block.role-page_note{font-size:.75em;color:#78836f}.block.role-derivation{margin-bottom:8px}
.figure-image{height:auto;max-height:none;object-fit:contain}
.brand.teachspace-brand{font-size:18px;letter-spacing:-.45px;gap:9px}.teachspace-brand .brand-mark{flex-shrink:0;width:35px;height:40px;font-family:Georgia,serif}.teachspace-brand small{font-size:9px;letter-spacing:.4px}.all-tools{font-size:10px;color:#66805c;margin:16px 0 0 2px;align-self:flex-start}.all-tools:hover{text-decoration:underline}.all-tools+.new-task{margin-top:20px}

.account-widget{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:22px;font-size:12px;color:var(--green)}.account-widget a{font-weight:600}.account-widget span{white-space:nowrap;font-size:11px}.account-widget+.new-task{margin-top:18px}

/* Keep the TeachSpace return action explicit at every sidebar width. */
.all-tools{display:flex;align-items:center;justify-content:center;gap:8px;align-self:stretch;min-height:40px;margin:18px 0 0;padding:9px 10px;border:1px solid #d0dccd;border-radius:7px;background:#fff;color:#35624f;font-size:14px;text-decoration:none}.all-tools:hover{background:#e7efe3;text-decoration:none}.all-tools:focus-visible{outline:3px solid #458e6b;outline-offset:3px}.home-short{display:none}
@media(max-width:850px){.all-tools{flex-direction:column;gap:0;padding:5px 0;font-size:12px;min-height:48px}.home-full{display:none}.home-short{display:inline}}