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red, red)){.app-dialog-danger{border-color:color-mix(in srgb,var(--danger) 48%,var(--line))}}.app-dialog-danger .app-dialog-symbol{border-color:var(--danger)}@supports (color:color-mix(in lab, red, red)){.app-dialog-danger .app-dialog-symbol{border-color:color-mix(in srgb,var(--danger) 55%,var(--line))}}.app-dialog-danger .app-dialog-symbol{background:var(--danger)}@supports (color:color-mix(in lab, red, red)){.app-dialog-danger .app-dialog-symbol{background:color-mix(in srgb,var(--danger) 13%,transparent)}}.app-dialog-danger .app-dialog-symbol,.app-dialog-danger .app-dialog-kicker{color:var(--danger)}.app-dialog-confirm.danger{border-color:var(--danger);background:var(--danger);color:#fff}.app-dialog-confirm.danger:focus-visible{outline-color:var(--danger)}@supports (color:color-mix(in lab, red, red)){.app-dialog-confirm.danger:focus-visible{outline-color:color-mix(in srgb,var(--danger) 42%,transparent)}}@keyframes app-dialog-fade{0%{opacity:0}to{opacity:1}}@keyframes app-dialog-rise{0%{opacity:0;transform:translateY(14px)scale(.98)}to{opacity:1;transform:none}}@media (max-width:520px){.app-dialog-backdrop{align-items:end;padding:12px}.app-dialog{border-radius:20px;padding:22px 18px}.app-dialog-actions{grid-template-columns:1fr 1fr;display:grid}.app-dialog-actions>.app-dialog-button:only-child{grid-column:1/-1}.app-dialog-button{width:100%;min-width:0}}@media (prefers-reduced-motion:reduce){.app-dialog-backdrop,.app-dialog{animation:none}.app-dialog-button{transition:none}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}.import-steps{border:1px solid var(--line);background:var(--line);border-radius:12px;grid-template-columns:repeat(3,1fr);gap:1px;margin:0 0 20px;padding:0;list-style:none;display:grid;overflow:hidden}.import-steps li{background:var(--paper);color:var(--muted);justify-content:center;align-items:center;gap:9px;padding:13px;font-size:12px;font-weight:800;display:flex}.import-steps li b{background:var(--surface-soft);width:24px;height:24px;color:var(--muted);border-radius:50%;place-items:center;display:grid}.import-steps li.active{color:var(--green);background:var(--surface-soft)}.import-steps li.active b,.import-steps li.done b{color:var(--on-accent);background:var(--green)}.service-pill{align-items:center;gap:6px;font-size:12px;font-weight:800;display:inline-flex}.service-pill:before{content:"";background:var(--green-soft);border-radius:50%;width:7px;height:7px}.service-pill.online{color:var(--success)}.service-pill.online:before{background:var(--green-soft);box-shadow:0 0 0 4px #e4f0e8}.service-pill.offline{color:var(--danger)}.import-upload-form{grid-template-columns:1fr 245px;align-items:center;gap:17px;padding:21px;display:grid}.import-upload-form>.button{border:0;min-height:52px}.import-run-controls{flex-direction:column;gap:10px;display:flex}.import-run-controls>.button{border:0;min-height:52px}.import-run-controls>small{color:var(--muted);font-size:12px;line-height:1.5}.page-range-fields{grid-template-columns:1fr auto 1fr;align-items:end;gap:8px;display:grid}.page-range-fields>span{color:var(--muted);padding-bottom:10px}.page-range-fields label{flex-direction:column;gap:5px;display:flex}.page-range-fields label span{color:var(--muted);font-size:12px;font-weight:800}.page-range-fields input{border:1px solid var(--line);background:var(--paper);width:100%;height:36px;color:var(--ink);border-radius:7px;padding:0 9px}.import-subject-context{gap:8px;grid-template-columns:1fr!important}.import-subject-context .field{grid-column:auto!important}.import-subject-context select{min-height:38px}.whole-paper-toggle{border:1px solid var(--line);background:var(--surface-soft);cursor:pointer;border-radius:9px;align-items:flex-start;gap:9px;padding:10px;display:flex}.whole-paper-toggle input{accent-color:var(--green);margin-top:3px}.whole-paper-toggle>span{gap:3px;display:grid}.whole-paper-toggle b{font-size:12px}.whole-paper-toggle small{color:var(--muted);font-size:11px;line-height:1.45}.whole-paper-mode-picker{gap:7px;display:grid}.whole-paper-mode-picker button{text-align:left;border:1px solid var(--line);background:var(--paper);width:100%;color:var(--ink);cursor:pointer;border-radius:9px;gap:3px;padding:10px 11px;display:grid}.whole-paper-mode-picker button:hover{border-color:var(--green-soft)}.whole-paper-mode-picker button.active{border-color:var(--green);background:var(--surface-soft);box-shadow:inset 3px 0 0 var(--green)}.whole-paper-mode-picker button:disabled{opacity:.65;cursor:default}.whole-paper-mode-picker b{font-size:13px}.whole-paper-mode-picker span{color:var(--muted);font-size:11px;line-height:1.45}.whole-paper-section{gap:5px;display:grid}.whole-paper-section>span{color:var(--muted);font-size:12px;font-weight:800}.whole-paper-section select{border:1px solid var(--line);background:var(--paper);width:100%;min-height:38px;color:var(--ink);border-radius:8px;padding:0 9px}.recognition-progress{gap:7px;display:grid}.recognition-progress>div{justify-content:space-between;align-items:center;gap:10px;font-size:12px;display:flex}.recognition-progress>div span,.recognition-progress small{color:var(--muted);font-size:12px}.recognition-progress>i{background:var(--surface-soft);border-radius:99px;height:7px;overflow:hidden}.recognition-progress>i span{border-radius:inherit;background:var(--green);height:100%;transition:width .2s;display:block}.stop-recognition{border:1px solid var(--line);background:var(--paper);min-height:34px;color:var(--warning);cursor:pointer;border-radius:8px;font-size:12px;font-weight:800}.stop-recognition:disabled{opacity:.65;cursor:default}.source-page-preview{border:1px solid var(--line);background:var(--paper);border-radius:10px;margin:0 18px 18px;padding:12px}.source-page-preview summary{cursor:pointer;color:var(--green);font-size:12px;font-weight:800}.source-page-preview img{object-fit:contain;background:#fff;border-radius:7px;width:100%;max-width:760px;max-height:680px;margin:12px auto 0;display:block}.math-preview{border:1px solid var(--line);background:var(--paper);border-radius:9px;margin:-6px 18px 16px;padding:12px 14px;font-size:12px;line-height:1.8}.math-preview>span{color:var(--muted);margin-bottom:5px;font-size:12px;font-weight:800;display:block}.detected-media{margin:0 18px 18px}.detected-media>b{font-size:12px}.detected-media>div,.option-image-list{flex-wrap:wrap;gap:10px;margin-top:8px;display:flex}.detected-media figure,.option-image-list figure{border:1px solid var(--line);background:var(--paper);border-radius:8px;margin:0;padding:7px;position:relative}.detected-media img{object-fit:contain;max-width:300px;max-height:220px;display:block}.option-image-list{grid-column:2/-1}.option-image-list img{object-fit:contain;max-width:220px;max-height:150px;display:block}.detected-media figure button,.option-image-list figure button{color:var(--on-accent);cursor:pointer;background:#20251fd1;border:0;border-radius:5px;padding:4px 6px;font-size:12px;position:absolute;top:5px;right:5px}.option-math-preview{background:var(--surface-soft);border-radius:7px;grid-column:2/-1;padding:8px 10px;font-size:12px;overflow-x:auto}.pdf-dropzone{border:2px dashed var(--line);background:var(--paper);cursor:pointer;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;min-height:128px;padding:22px;transition:all .16s;display:flex}.pdf-dropzone:hover,.pdf-dropzone.has-file{border-color:var(--line);background:var(--surface-soft)}.pdf-dropzone input{opacity:0;width:1px;height:1px;position:absolute}.pdf-dropzone b{font-size:14px}.pdf-dropzone span{color:var(--muted);margin-top:8px;font-size:12px}.service-help{border-top:1px solid var(--line);background:var(--paper);align-items:center;gap:12px;padding:13px 20px;display:flex}.service-help b{color:var(--warning);font-size:12px}.service-help span{color:var(--muted);font-size:12px}.import-error{margin:0 0 20px}.recognition-summary{grid-template-columns:repeat(4,1fr);gap:12px;margin:24px 0;display:grid}.recognition-summary div{border:1px solid var(--line);background:var(--paper);border-radius:11px;padding:16px 18px}.recognition-summary span{color:var(--muted);margin-bottom:7px;font-size:12px;display:block}.recognition-summary b{font-size:14px}.recognition-summary b.needs-work{color:var(--warning)}.recognition-summary b.ready{color:var(--success)}.ocr-warnings{border:1px solid var(--line);background:var(--paper);border-radius:11px;grid-template-columns:110px 1fr;gap:15px;margin-bottom:20px;padding:16px 19px;font-size:12px;display:grid}.ocr-warnings b{color:var(--warning)}.ocr-warnings ul{color:var(--muted);gap:6px;margin:0;padding-left:18px;display:grid}.imported-question{border-left:4px solid var(--line)}.imported-question.reviewed{border-left-color:var(--success)}.add-option-button{border:1px dashed var(--line);background:var(--paper);color:var(--green);cursor:pointer;border-radius:8px;padding:8px 11px;font-size:12px;font-weight:800}.sticky-import-actions{z-index:10;border:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fffffff0;border-radius:12px;padding:13px;position:sticky;bottom:15px;box-shadow:0 10px 35px #23322824}.admin-title-actions{gap:9px;display:flex}.import-material-display{border:1px solid var(--line);background:var(--paper);border-radius:9px;min-width:0;margin:12px 0;padding:12px 14px}.import-material-display summary{cursor:pointer;color:var(--green);font-size:12px;font-weight:800}.import-material-display>div{white-space:pre-wrap;max-height:440px;margin-top:12px;font-size:14px;line-height:2;overflow:auto}.import-material-display ruby{ruby-position:over}.import-material-display rt{font-size:.65em}.imported-question .math-slot-rule-row{grid-template-columns:64px minmax(80px,.6fr) minmax(150px,1fr) minmax(150px,1fr) minmax(120px,.6fr);align-items:center;gap:10px;display:grid}.imported-question .math-slot-rule-row>label{white-space:nowrap;flex-direction:column;gap:5px;display:flex}.imported-question .math-slot-rule-row input{width:100%;min-width:0}.import-figure-crop{margin:16px 18px}.import-figure-crop>div{border:1px solid var(--line);border-radius:8px;padding:12px}.import-crop-canvas{width:100%;margin:12px 0;line-height:0;position:relative}.import-crop-canvas img{touch-action:none;cursor:crosshair;width:100%;height:auto;display:block}.import-crop-canvas>span{pointer-events:none;border:2px solid var(--green);background:#72ba7933;position:absolute}@media (max-width:900px){.imported-question .math-slot-rule-row{grid-template-columns:64px minmax(0,1fr)}.imported-question .math-slot-rule-row>label,.imported-question .math-slot-rule-row>select{grid-column:2}}@media (max-width:700px){.import-upload-form{grid-template-columns:1fr;padding:15px}.service-help{flex-direction:column;align-items:flex-start}.recognition-summary{grid-template-columns:1fr 1fr}.ocr-warnings{grid-template-columns:1fr}.admin-header nav a:nth-child(3){display:none}}body{background:var(--art-paper);color:var(--ink);font-family:var(--art-sans);font-size:16px}::selection{color:var(--on-accent);background:var(--green)}:focus-visible{outline:3px solid var(--green);outline-offset:4px}.page-width{width:min(1360px,100% - 64px)}.site-header,.site-header.minimal{background:var(--header-bg);height:76px;box-shadow:none;border:0}.header-inner{gap:24px}.brand{min-width:130px}.site-header .site-brand{flex:none;min-width:0}.site-brand-logo{width:180px;height:auto;display:block}.site-brand-logo.logo-night,[data-theme=night] .site-brand-logo.logo-day{display:none}[data-theme=night] .site-brand-logo.logo-night{display:block}.brand b{font:850 28px/1 var(--art-sans);color:var(--green);letter-spacing:-.06em}.brand small{font:500 12px/1.5 var(--art-sans);color:var(--muted);letter-spacing:0}.site-header nav{border:1px solid var(--line);background:var(--paper);border-radius:99px;align-self:center;gap:4px;margin:0 auto;padding:6px}.site-header nav>a{min-width:0;color:var(--muted);font:650 14px/1.2 var(--art-sans);border:0;border-radius:99px;flex-direction:row;gap:8px;padding:12px 17px}.site-header nav>a:before,.site-header nav>a:after{content:none}.site-header nav>a.active,.site-header nav>a:hover{color:var(--green);background:var(--green-soft);border:0}.header-actions{flex-shrink:0;gap:14px;min-width:0;margin-left:auto;display:flex}.theme-control{border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:99px;flex-shrink:0;align-items:center;gap:4px;padding:7px 9px;display:inline-flex}.theme-control>span{text-align:center;width:20px;color:var(--green);font-size:21px;line-height:1}.theme-control select{max-width:68px;min-height:26px;color:inherit;cursor:pointer;background:0 0;border:0;padding:0;font-size:13px}.theme-control option{background:var(--paper);color:var(--ink)}.account-actions{border:1px solid var(--line);background:var(--paper);border-radius:99px;align-items:center;gap:3px;min-width:0;padding:3px;display:flex}.user-chip{background:0 0;border-radius:99px;min-width:0;max-width:150px;padding:0 10px 0 0;overflow:hidden}.user-chip b{text-overflow:ellipsis;white-space:nowrap;min-width:0;font-size:13px;overflow:hidden}.user-chip>span{width:34px;height:34px;color:var(--on-accent);background:var(--green);flex:0 0 34px;font-size:14px}.signup-button{color:var(--on-accent);background:var(--green);border-radius:99px;font-size:14px}.logout-link,.login-link{white-space:nowrap;min-height:34px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:99px;flex:none;justify-content:center;align-items:center;padding:0 10px;font-size:13px;display:inline-flex}.logout-link:hover,.login-link:hover{color:var(--green);background:var(--green-soft)}.button{letter-spacing:0;border-radius:12px;min-height:48px;padding-inline:22px;font-size:14px}.button:after{content:none}.button-primary,.button-dark{color:var(--on-accent);background:var(--green);box-shadow:0 7px 20px color-mix(in srgb,var(--green) 18%,transparent)}.button-primary:hover,.button-dark:hover{background:var(--green-dark)}.button-secondary{color:var(--ink);background:var(--paper);border-color:var(--line)}.text-link{color:var(--green);border:0}.overline{color:var(--green);font:700 12px/1.5 var(--art-sans);letter-spacing:.12em}.overline:before{content:none}.hero{grid-template-columns:.9fr 1.35fr;gap:36px;min-height:420px;padding:30px 0}.hero:after{content:none}.hero-copy{z-index:1;text-align:left;position:relative}.eyebrow{color:var(--muted);background:0 0;border:0;padding:0;font-size:13px}.status-dot{background:var(--green);box-shadow:0 0 0 4px var(--green-soft)}.hero-copy h1{color:var(--hero-ink);font:850 clamp(46px,4.8vw,68px)/1.13 var(--art-sans);letter-spacing:-.055em;margin:24px 0 18px}.hero-copy h1 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