/*! tailwindcss v4.3.3 | MIT License | https://tailwindcss.com */@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;-moz-tab-size:4;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab,red,red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){-webkit-appearance:button;-moz-appearance:button;appearance:button}::file-selector-button{-webkit-appearance:button;-moz-appearance:button;appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.fixed{position:fixed}.static{position:static}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.contents{display:contents}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}}:root{--green:#58cc02;--green-dark:#46a302;--blue:#1cb0f6;--blue-dark:#158dcc;--yellow:#ffc800;--coral:#ff7a59;--page:#f7f7f5;--surface:#fff;--line:#e5e7eb;--line-strong:#d7dce2;--text:#3d4248;--muted:#6f7780;--quiet:#9aa2aa;--blue-soft:#eef9ff;--green-soft:#eff9e9;--yellow-soft:#fff8dc;--shadow:0 10px 28px #2a384412;--shadow-soft:0 4px 16px #2a38440f;color:var(--text);background:var(--page);font-synthesis:none;text-rendering:optimizelegibility;font-family:Nunito,Noto Sans SC,ui-sans-serif,system-ui,sans-serif}.status-chip.yellow{color:#8c6d00;background:var(--yellow-soft)}.teacher-pdf-lab{flex-direction:column;gap:14px;display:flex;overflow:hidden}.teacher-pdf-lab-boundary,.teacher-pdf-lab-status,.teacher-pdf-lab-notice,.teacher-pdf-lab-help,.teacher-pdf-result-note{margin:0;font-size:11px;line-height:1.55}.teacher-pdf-lab-boundary{color:var(--blue-dark);background:var(--blue-soft);border-radius:10px;align-items:flex-start;gap:7px;padding:10px 12px;display:flex}.teacher-pdf-lab-file-row{border:1px solid var(--line);background:#f8fbfd;border-radius:12px;flex-wrap:wrap;align-items:center;gap:10px;padding:12px;display:flex}.teacher-pdf-lab-file-row label{color:var(--text);font-size:12px;font-weight:900}.teacher-pdf-lab-file-row input{max-width:100%;color:var(--muted);font-size:12px}.teacher-pdf-lab-file-row span{min-width:0;color:var(--quiet);overflow-wrap:anywhere;font-size:10px}.teacher-pdf-lab-status{color:var(--blue-dark)}.teacher-pdf-lab-notice{color:#8c6d00;background:var(--yellow-soft);border-radius:10px;padding:10px 12px}.teacher-pdf-lab-toolbar{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.teacher-pdf-lab-toolbar>span{min-width:92px;color:var(--muted);text-align:center;font-size:11px;font-weight:900}.teacher-pdf-lab-toolbar .button{min-height:36px;padding:8px 11px;font-size:10px}.teacher-pdf-lab-help{color:var(--quiet)}.teacher-pdf-stage{border:1px solid var(--line-strong);width:min(100%,960px);box-shadow:var(--shadow-soft);-webkit-user-select:none;user-select:none;background:#e9edf0;border-radius:12px;margin:0 auto;position:relative;overflow:hidden}.teacher-pdf-stage.active{border-color:var(--blue);box-shadow:0 0 0 3px #1cb0f61f,var(--shadow-soft);cursor:crosshair}.teacher-pdf-stage canvas{background:#fff;width:100%;height:auto;display:block}.teacher-pdf-selection-rect,.teacher-pdf-word-highlight{pointer-events:none;position:absolute}.teacher-pdf-selection-rect{background:#ffc8002e;border:2px dashed #8c6d00c7}.teacher-pdf-word-highlight{background:#ffc8006b;border-bottom:2px solid #8c6d00b3}.teacher-pdf-recognized{color:var(--text);background:var(--yellow-soft);border:1px solid #f0df8c;border-radius:10px;flex-direction:column;gap:5px;padding:11px 12px;display:flex}.teacher-pdf-recognized span,.teacher-pdf-result-source span{color:#8c6d00;font-size:10px;font-weight:900}.teacher-pdf-recognized strong{overflow-wrap:anywhere;font-size:13px;line-height:1.55}.teacher-pdf-result{background:#fbfef9;border:1px solid #dcefd1;border-radius:14px;flex-direction:column;gap:11px;padding:16px;display:flex}.teacher-pdf-result-error{background:#fffdf5;border-color:#f0df8c}.teacher-pdf-result-heading{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.teacher-pdf-result-heading h3{color:var(--text);letter-spacing:-.025em;margin:0;font-size:17px;line-height:1.3}.teacher-pdf-result-source{color:var(--text);background:var(--yellow-soft);overflow-wrap:anywhere;border-radius:9px;flex-direction:column;gap:4px;margin:0;padding:10px 11px;font-size:12px;line-height:1.55;display:flex}.teacher-pdf-result-text{color:var(--text);overflow-wrap:anywhere;margin:0;font-size:15px;font-weight:700;line-height:1.65}.teacher-pdf-result-text span{color:#8c6d00;margin-bottom:4px;font-size:10px;font-weight:900;display:block}.teacher-pdf-result-note{color:var(--quiet)}@media (max-width:650px){.teacher-pdf-lab{padding:15px}.teacher-pdf-lab-toolbar{align-items:stretch}.teacher-pdf-lab-toolbar .button,.teacher-pdf-lab-toolbar>span{flex:calc(50% - 8px)}.teacher-pdf-lab-toolbar>span{place-items:center;display:grid}.teacher-pdf-result-heading{flex-direction:column}}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{background:var(--page);min-width:320px}button,input{font:inherit}button{border:0}button:focus-visible,input:focus-visible{outline-offset:2px;outline:3px solid #1cb0f661}button:disabled{cursor:not-allowed;opacity:.58}.app-shell,.reading-shell,.entry-shell{background:var(--page);min-height:100vh}.page-width{width:min(100% - 48px,1420px);margin:0 auto}.topbar,.reading-topbar,.entry-topbar{background:var(--surface);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;min-height:72px;padding:14px 28px;display:flex}.brand-lockup,.reading-brand-group,.topbar-actions,.reading-top-actions,.shelf-tools,.reading-progress,.progress-with-label,.field-help,.event-toolbar,.event-toolbar>div,.event-dialog-footer{align-items:center;display:flex}.brand-lockup{color:var(--green);letter-spacing:-.04em;white-space:nowrap;gap:10px;font-size:25px;font-weight:900}.brand-mark{width:29px;height:29px;color:var(--green);flex:none}.topbar-actions,.reading-top-actions{gap:16px}.demo-label,.local-pill,.status-chip,.task-kind,.word-count,.status-help,.feedback-empty-label,.read-only-label{border-radius:999px;align-items:center;width:fit-content;font-size:12px;font-weight:800;line-height:1.2;display:inline-flex}.demo-label{color:var(--muted);white-space:nowrap}.local-pill{color:var(--blue-dark);background:var(--blue-soft);white-space:nowrap;padding:7px 10px}.status-chip{padding:6px 10px}.status-chip.blue{color:var(--blue-dark);background:var(--blue-soft)}.status-chip.green{color:var(--green-dark);background:var(--green-soft)}.text-button{color:var(--blue-dark);cursor:pointer;background:0 0;align-items:center;gap:6px;padding:6px 0;font-size:13px;font-weight:800;display:inline-flex}.text-button:hover{color:var(--blue)}.icon-button{width:38px;height:38px;color:var(--muted);background:var(--surface);border:1px solid var(--line);cursor:pointer;border-radius:12px;justify-content:center;align-items:center;display:inline-flex}.icon-button:hover{color:var(--blue-dark);border-color:#b9dff1}.icon-button.subtle{background:#f7f8f9;border-color:#0000;width:32px;height:32px}.icon-small{flex:none;width:16px;height:16px}.icon-medium{flex:none;width:20px;height:20px}.button{cursor:pointer;border-radius:13px;justify-content:center;align-items:center;gap:7px;min-height:42px;padding:10px 17px;font-size:13px;font-weight:900;line-height:1.1;transition:transform .12s,box-shadow .12s,background .12s;display:inline-flex}.button:active:not(:disabled){transform:translateY(1px)}.button.primary{color:#fff;background:var(--green);box-shadow:inset 0 -3px 0 var(--green-dark)}.button.primary:hover:not(:disabled){background:#62d30c;box-shadow:inset 0 -3px #3e9300,0 5px 12px #58cc022e}.blue-button{color:#fff;background:var(--blue);box-shadow:inset 0 -3px 0 var(--blue-dark)}.blue-button:hover:not(:disabled){background:#26b6f5}.quiet-button{color:var(--muted);background:var(--surface);border:1px solid var(--line);box-shadow:inset 0 -2px #dfe2e5}.quiet-button:hover:not(:disabled){color:var(--blue-dark);border-color:#b9dff1}.full-width{width:100%}.panel{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-soft);border-radius:18px}.panel-heading,.section-heading,.original-heading,.event-dialog-heading,.answer-reveal-row{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.panel-heading h2,.section-heading h2,.original-heading h1,.task-card h2,.continue-copy h2,.shelf-intro h1,.scope-main h1,.entry-card h1{color:var(--text);letter-spacing:-.035em;margin:0}.panel-heading h2{font-size:17px;line-height:1.2}.panel-kicker,.eyebrow,.chapter-label{color:var(--blue-dark);letter-spacing:.08em;text-transform:uppercase;margin:0 0 5px;font-size:11px;font-weight:900}.panel-intro,.lede,.quiet-copy,.section-heading p,.scope-main .lede{color:var(--muted);line-height:1.65}.entry-topbar{padding-inline:42px}.entry-main{place-items:center;min-height:calc(100vh - 72px);padding:42px 24px 56px;display:grid}.entry-card{background:var(--surface);border:1px solid var(--line);width:min(100%,480px);box-shadow:var(--shadow);text-align:center;border-radius:24px;padding:36px 40px 30px}.entry-illustration{width:76px;height:76px;color:var(--green);background:var(--green-soft);border-radius:22px;place-items:center;margin:0 auto 22px;display:grid}.entry-lantern{width:42px;height:42px}.entry-card .eyebrow{color:var(--green-dark)}.entry-card h1{font-size:clamp(28px,5vw,36px);line-height:1.15}.entry-card .lede{margin:16px 0 26px;font-size:14px}.entry-form{text-align:left;flex-direction:column;align-items:stretch;gap:9px;display:flex}.entry-form label{font-size:13px;font-weight:900}.entry-form input{width:100%;color:var(--text);border:1px solid var(--line-strong);letter-spacing:.04em;background:#fbfcfd;border-radius:12px;padding:13px 14px;font-size:15px;font-weight:700}.entry-form input::placeholder{color:#b3bac1;letter-spacing:0}.field-help{color:var(--quiet);gap:6px;font-size:11px;line-height:1.5}.form-message{color:#bb5b36;margin:2px 0 0;font-size:12px;line-height:1.5}.saved-session-note{color:var(--muted);background:var(--yellow-soft);text-align:left;border-radius:13px;flex-direction:column;gap:5px;margin-top:22px;padding:13px 14px;font-size:12px;line-height:1.5;display:flex}.saved-session-note strong{color:#8a6b00}.saved-session-note .text-button{align-self:flex-start;font-size:12px}.entry-footer{color:var(--quiet);text-align:center;margin:20px 0 0;font-size:11px}.shelf-main{flex-direction:column;gap:28px;padding:42px 0 54px;display:flex}.shelf-intro{justify-content:space-between;align-items:flex-end;gap:36px;display:flex}.shelf-intro h1{max-width:620px;font-size:clamp(29px,4vw,42px);line-height:1.1}.shelf-intro .lede{max-width:670px;margin:14px 0 0;font-size:15px}.research-context{min-width:285px;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:14px;gap:5px;padding:15px 17px;font-size:11px;display:grid}.context-label{color:var(--quiet);letter-spacing:.07em;text-transform:uppercase;margin-bottom:3px;font-size:10px;font-weight:900}.continue-card{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-soft);border-radius:20px;grid-template-columns:150px minmax(0,1fr) auto;align-items:center;gap:24px;padding:24px;display:grid}.story-cover{color:#476f3b;text-align:center;background:linear-gradient(160deg,#e5f5c8,#f6fbef 58%,#dceef6);border:1px solid #cfe6c2;border-radius:15px;flex-direction:column;justify-content:center;align-items:center;gap:2px;min-width:0;height:180px;padding:14px;font-size:15px;font-weight:900;display:flex;overflow:hidden}.story-cover-title,.story-cover-subtitle{overflow-wrap:anywhere;text-align:center;max-width:100%}.story-cover-title{-webkit-line-clamp:3;-webkit-box-orient:vertical;line-height:1.2;display:-webkit-box;overflow:hidden}.story-cover-subtitle{-webkit-line-clamp:2;color:#62805a;-webkit-box-orient:vertical;font-size:11px;line-height:1.3;display:-webkit-box;overflow:hidden}.cover-lantern{width:64px;height:64px;color:var(--green-dark);margin-bottom:9px}.book-cover-pdf{object-fit:contain;background:#fff;border:1px solid #cfe6c2;border-radius:10px;width:100%;height:auto;max-height:240px;display:block;box-shadow:0 3px 10px #00000014}.book-cover-fallback{height:180px}.continue-copy{min-width:0}.continue-copy h2{overflow-wrap:anywhere;margin-top:12px;font-size:clamp(23px,3vw,30px);line-height:1.1}.continue-copy p{overflow-wrap:anywhere;margin:7px 0 0;font-size:13px}.continue-copy .quiet-copy{color:var(--quiet);font-size:12px}.progress-with-label{gap:10px;margin-top:20px}.progress-with-label strong{color:var(--green-dark);font-size:13px}.progress-line{background:#e7eaed;border-radius:999px;flex:1;height:9px;overflow:hidden}.progress-line span{background:var(--green);border-radius:inherit;height:100%;display:block}.continue-action{flex-direction:column;align-items:center;gap:9px;min-width:160px;display:flex}.continue-action .button{min-width:155px;min-height:48px;font-size:15px}.continue-action span{color:var(--quiet);font-size:11px}.shelf-section{flex-direction:column;gap:15px;display:flex}.section-heading{align-items:flex-end}.section-heading h2{font-size:21px}.section-heading p{margin:5px 0 0;font-size:12px}.page-overview-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;display:grid}.page-overview-card{min-width:0;color:var(--text);background:var(--surface);border:1px solid var(--line);text-align:left;cursor:pointer;border-radius:15px;align-items:center;gap:11px;padding:15px;transition:border-color .12s,box-shadow .12s;display:flex}.page-overview-card:hover{box-shadow:var(--shadow-soft);border-color:#bddff0}.page-number{width:30px;height:30px;color:var(--blue-dark);background:var(--blue-soft);border-radius:10px;flex:none;place-items:center;font-size:13px;font-weight:900;display:grid}.page-overview-copy,.status-row-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.page-overview-copy strong,.status-row-copy strong{color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:12px;line-height:1.3;overflow:hidden}.page-overview-copy span,.status-row-copy span{color:var(--quiet);font-size:11px}.status-dot{background:#d6dbe0;border-radius:50%;flex:none;justify-content:center;align-items:center;width:10px;height:10px;display:inline-flex}.status-dot.saved{background:var(--blue)}.status-dot.first_round{background:var(--yellow)}.status-dot.completed{color:#fff;background:var(--green);width:18px;height:18px}.dot-check{width:12px;height:12px}.low-pressure-note{color:var(--muted);background:#f0f7fb;border:1px solid #dceef7;border-radius:15px;justify-content:space-between;align-items:center;gap:20px;padding:16px 18px;font-size:12px;line-height:1.5;display:flex}.low-pressure-note>div:first-child{flex-direction:column;gap:3px;display:flex}.low-pressure-note strong{color:var(--blue-dark)}.shelf-tools{flex-wrap:wrap;justify-content:flex-end;gap:13px}.shelf-tools .button{min-height:36px;padding:8px 12px;font-size:11px}.reading-topbar{min-height:70px;padding-inline:24px}.reading-brand-group{gap:10px;min-width:250px}.reading-brand-group>div{flex-direction:column;gap:2px;min-width:0;display:flex}.reading-brand-group strong{text-overflow:ellipsis;white-space:nowrap;font-size:15px;line-height:1.2;overflow:hidden}.reading-brand-group span{color:var(--quiet);font-size:11px}.reading-progress{width:min(35vw,400px);color:var(--muted);white-space:nowrap;gap:9px;font-size:11px;font-weight:800}.reading-progress .progress-line{height:8px}.reading-progress b{color:var(--green-dark)}.reading-main{padding:24px 0 12px}.reading-grid{grid-template-columns:minmax(0,1.34fr) minmax(245px,.76fr) minmax(320px,.98fr);align-items:start;gap:17px;display:grid}.original-panel,.support-rail,.task-card,.lesson-feedback,.status-navigator{padding:20px}.original-panel{min-height:610px;position:relative}.original-heading{align-items:flex-end}.original-heading h1{font-size:clamp(23px,3vw,30px);line-height:1.15}.chapter-label{margin-bottom:7px}.word-count{color:var(--muted);white-space:nowrap;background:#f4f6f7;padding:6px 9px}.reading-instruction{color:var(--quiet);border-bottom:1px dashed var(--line-strong);margin:18px 0 19px;padding-bottom:14px;font-size:12px;line-height:1.5}.story-text{-webkit-user-select:text;user-select:text;cursor:text}.story-text p{color:#40464c;margin:0 0 19px;font-size:clamp(15px,1.3vw,17px);font-weight:500;line-height:1.9}.story-text p:last-child{margin-bottom:0}.selectable-word{border-radius:3px}.selectable-word:hover{background:#eaf7fd}.story-sentence.is-mapped{-webkit-text-decoration-skip-ink:auto;text-decoration-skip-ink:auto;text-underline-offset:4px;text-decoration-line:underline;text-decoration-thickness:3px}.story-sentence.mapping-color-0{text-decoration-color:#edc64a}.story-sentence.mapping-color-1{text-decoration-color:#64b7df}.story-sentence.mapping-color-2{text-decoration-color:#79c58d}.mapping-note,.word-selection-help{color:var(--blue-dark);background:var(--blue-soft);border-radius:10px;margin-top:18px;padding:10px 12px;font-size:12px;line-height:1.5}.word-selection-help{color:var(--quiet);background:#fafbfb}.word-selection-help.is-notice{color:#8c6d00;background:var(--yellow-soft)}.word-support-popover{z-index:5;background:#fff;border:1px solid #a9dcf3;border-radius:14px;width:min(300px,100% - 36px);padding:13px;position:absolute;box-shadow:0 16px 32px #2b48582e}.word-popover-heading{align-items:flex-start;gap:12px}.word-popover-heading>div{flex-direction:column;gap:5px;display:flex}.word-popover-kicker{color:var(--blue-dark);align-items:center;gap:5px;font-size:10px;font-weight:900;display:inline-flex}.word-popover-heading strong{color:var(--text);font-size:16px}.word-popover-heading .icon-button{margin-left:auto}.word-popover-action{width:100%;min-height:36px;margin-top:12px;font-size:11px}.word-popover-result{color:var(--muted);background:var(--green-soft);border-radius:10px;margin:12px 0 0;padding:10px;font-size:12px;line-height:1.55}.word-popover-notice{color:#8c6d00;margin:9px 0 0;font-size:11px;line-height:1.5}.word-popover-source{color:var(--quiet);margin-top:10px;font-size:10px;display:block}.support-rail{min-height:610px}.panel-intro{margin:13px 0 17px;font-size:11px}.support-action-list{flex-direction:column;gap:10px;display:flex}.support-action{width:100%;color:var(--text);text-align:left;cursor:pointer;background:#f5fbff;border:1px solid #d5edf9;border-radius:13px;grid-template-columns:39px minmax(0,1fr) 17px;align-items:center;gap:10px;padding:12px 11px;transition:background .12s,border-color .12s;display:grid}.support-action:hover:not(:disabled){background:#eef9ff;border-color:#a9dcf3}.support-action.is-disabled{cursor:not-allowed}.support-icon{width:39px;height:39px;color:var(--blue-dark);background:#e2f4fd;border-radius:11px;place-items:center;display:grid}.support-svg{width:24px;height:24px}.support-action-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.support-action-copy strong{color:var(--text);font-size:12px;line-height:1.25}.support-action-copy span{color:var(--muted);font-size:10px;line-height:1.35}.support-arrow{width:17px;height:17px;color:var(--blue-dark)}.support-loading,.support-notice{color:var(--blue-dark);margin:12px 0 0;font-size:11px;line-height:1.5}.support-notice{background:var(--yellow-soft);color:#8c6d00;border-radius:10px;padding:9px 10px}.support-results{border-top:1px dashed var(--line-strong);flex-direction:column;gap:8px;margin-top:17px;padding-top:15px;display:flex}.support-results-title{color:var(--muted);justify-content:space-between;gap:8px;font-size:11px;font-weight:800;display:flex}.support-results-title span:last-child{color:var(--quiet)}.simplify-block-list{flex-direction:column;gap:8px;display:flex}.simplify-block{color:var(--muted);border-left:4px solid #0000;border-radius:10px;margin:0;padding:10px 11px;font-size:11px;line-height:1.55}.simplify-block.mapping-color-0{background:#fff8dc;border-left-color:#edc64a}.simplify-block.mapping-color-1{background:#e9f6fd;border-left-color:#64b7df}.simplify-block.mapping-color-2{background:#eaf7ed;border-left-color:#79c58d}.support-result{border-radius:11px;padding:10px 11px}.support-result.word{background:var(--green-soft)}.support-result.simplify{background:var(--blue-soft)}.support-result.hint{background:var(--yellow-soft)}.support-result-heading{color:var(--text);justify-content:space-between;gap:8px;font-size:11px;display:flex}.support-result-heading span{color:var(--quiet);font-size:9px;font-weight:800}.support-result p{color:var(--muted);margin:6px 0 0;font-size:11px;line-height:1.55}.support-empty{color:var(--quiet);background:#fafbfb;border-radius:11px;align-items:center;gap:9px;margin-top:22px;padding:13px 11px;font-size:11px;line-height:1.5;display:flex}.support-empty-icon{width:24px;height:24px;color:var(--green);flex:none}.support-boundary{color:var(--quiet);border-top:1px solid var(--line);align-items:flex-start;gap:7px;margin-top:18px;padding-top:14px;font-size:10px;line-height:1.5;display:flex}.task-column{flex-direction:column;gap:15px;min-width:0;display:flex}.task-card{min-width:0}.task-heading{border-bottom:1px solid var(--line);align-items:center;padding-bottom:14px}.task-kind{color:#8a6b00;background:var(--yellow-soft);padding:6px 9px}.task-prompt{color:var(--text);margin:18px 0 15px;font-size:16px;font-weight:800;line-height:1.45}.task-choices{flex-direction:column;gap:8px;display:flex}.task-choice{width:100%;min-height:46px;color:var(--muted);background:var(--surface);border:1px solid var(--line);text-align:left;cursor:pointer;border-radius:11px;align-items:center;gap:10px;padding:10px 11px;font-size:12px;line-height:1.35;transition:border-color .12s,background .12s;display:flex}.task-choice:hover:not(:disabled){background:#fbfeff;border-color:#a9dcf3}.task-choice.selected{color:var(--blue-dark);background:var(--blue-soft);border-color:var(--blue)}.choice-marker{width:24px;height:24px;color:var(--muted);border:1px solid #ccd2d7;border-radius:50%;flex:none;place-items:center;font-size:10px;font-weight:900;display:grid}.task-choice.selected .choice-marker{color:#fff;background:var(--blue);border-color:var(--blue)}.choice-selected-icon{width:19px;height:19px;color:var(--blue);margin-left:auto}.task-hint-area{background:#fffaf0;border:1px solid #f3e5b6;border-radius:12px;margin-top:15px;padding:11px}.task-hint-heading{align-items:center;gap:10px}.task-hint-title{align-items:center;gap:8px;min-width:0;display:flex}.task-hint-icon{color:#9a7800;background:#ffefb3;border-radius:9px;flex:none;place-items:center;width:28px;height:28px;display:grid}.task-hint-title>div{flex-direction:column;gap:3px;min-width:0;display:flex}.task-hint-title strong{color:#765d00;font-size:11px}.task-hint-title span{color:#9a842f;font-size:10px;line-height:1.35}.hint-button{color:#765d00;cursor:pointer;background:#fff;border:1px solid #e8d27c;border-radius:9px;flex:none;min-height:32px;padding:7px 9px;font-size:10px;font-weight:900}.hint-button:hover:not(:disabled){background:#fff5cf}.hint-button:disabled{cursor:wait;opacity:.65}.task-hint-result{background:#fff;border-radius:9px;margin-top:10px;padding:9px 10px}.task-hint-result>span{color:#9a842f;font-size:9px;font-weight:900}.task-hint-result p{color:var(--muted);margin:5px 0 0;font-size:11px;line-height:1.55}.task-hint-notice{color:#8c6d00;margin:8px 0 0;font-size:10px;line-height:1.45}.task-state{border-radius:11px;align-items:flex-start;gap:8px;margin-top:15px;padding:11px;font-size:11px;line-height:1.5;display:flex}.task-state.neutral{color:var(--muted);background:#f7f8f9}.task-state.saved,.task-state.positive{color:var(--green-dark);background:var(--green-soft)}.task-state.attention{color:#8d6e00;background:var(--yellow-soft)}.answer-reveal{color:var(--muted);background:var(--blue-soft);border:1px solid #d5edf9;border-radius:12px;flex-direction:column;gap:8px;margin-top:15px;padding:13px;font-size:11px;line-height:1.55;display:flex}.answer-reveal-row{color:var(--blue-dark);align-items:center;font-size:12px}.read-only-label{color:var(--blue-dark);background:#fff;padding:4px 7px}.answer-reveal p{margin:0}.answer-reveal b{color:var(--text)}.lesson-feedback{background:#fbfef9;border-color:#dcefd1;justify-content:space-between;align-items:center;gap:14px;padding:16px;display:flex}.lesson-feedback.second-round{background:#f4fbff;border-color:#d6edf8}.lesson-feedback.empty-feedback{background:var(--surface);border-color:var(--line)}.lesson-feedback h2{color:var(--text);margin:0;font-size:14px;line-height:1.3}.lesson-feedback p:not(.panel-kicker){max-width:290px;color:var(--muted);margin:5px 0 0;font-size:10px;line-height:1.5}.lesson-feedback .button{flex:none;font-size:11px}.status-navigator{padding:17px}.compact-heading{border-bottom:1px solid var(--line);align-items:center;padding-bottom:11px}.status-help{color:var(--quiet);font-size:10px;font-weight:700}.status-list{flex-direction:column;gap:5px;margin-top:9px;display:flex}.status-row{width:100%;color:var(--text);text-align:left;cursor:pointer;background:0 0;border-radius:10px;grid-template-columns:19px minmax(0,1fr) 15px;align-items:center;gap:8px;padding:8px 7px;display:grid}.status-row:hover,.status-row.active{background:#f4f9fb}.status-row.active{box-shadow:inset 3px 0 0 var(--blue)}.status-row-copy strong{font-size:11px}.status-row-copy span{font-size:10px}.status-arrow{color:var(--quiet)}.latest-support-strip{color:var(--blue-dark);background:var(--blue-soft);border-radius:11px;align-items:center;gap:7px;padding:10px 12px;font-size:10px;display:flex}.latest-support-strip span:last-child{color:var(--quiet);margin-left:auto}.page-navigation{background:var(--surface);border:1px solid var(--line);border-radius:15px;justify-content:space-between;align-items:center;gap:15px;margin-top:17px;padding:12px 15px;display:flex}.page-number-list{flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:6px;display:flex}.page-number-item{flex-direction:column;align-items:center;gap:5px;min-width:31px;display:flex;position:relative}.page-number-button{width:31px;height:31px;color:var(--muted);background:var(--surface);border:1px solid var(--line);cursor:pointer;border-radius:9px;place-items:center;font-size:11px;font-weight:900;display:grid}.page-number-button:hover{border-color:#a9dcf3}.page-number-button.active{color:#fff;background:var(--green);border-color:var(--green)}.page-status-dot{color:#fff;background:#d6dbe0;border-radius:50%;place-items:center;width:7px;height:7px;display:grid}.page-status-dot.saved{background:var(--blue)}.page-status-dot.first_round{background:var(--yellow)}.page-status-dot.completed{background:var(--green);width:15px;height:15px}.page-status-check{width:10px;height:10px}.page-tooltip{z-index:6;width:max-content;max-width:220px;color:var(--text);pointer-events:none;background:#fff;border:1px solid #c9e7f5;border-radius:9px;flex-direction:column;gap:3px;padding:8px 10px;font-size:10px;line-height:1.35;display:flex;position:absolute;bottom:calc(100% + 12px);left:50%;transform:translate(-50%);box-shadow:0 10px 22px #2b485829}.page-tooltip:after{content:"";background:#fff;border-bottom:1px solid #c9e7f5;border-right:1px solid #c9e7f5;width:8px;height:8px;position:absolute;bottom:-5px;left:50%;transform:translate(-50%)rotate(45deg)}.page-tooltip strong{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.page-tooltip span{color:var(--muted)}.reading-footer{width:min(100% - 48px,1420px);color:var(--quiet);justify-content:space-between;gap:14px;margin:0 auto;padding:4px 0 16px;font-size:10px;display:flex}.event-overlay{z-index:20;background:#323c4440;place-items:center;padding:24px;display:grid;position:fixed;top:0;right:0;bottom:0;left:0}.event-dialog{background:var(--surface);border:1px solid var(--line);border-radius:19px;flex-direction:column;width:min(100%,700px);max-height:min(760px,100vh - 48px);padding:22px;display:flex;box-shadow:0 22px 55px #24303a33}.event-dialog-heading{align-items:center}.event-dialog-heading h2{margin:0;font-size:20px}.event-explainer{color:var(--muted);margin:13px 0;font-size:12px;line-height:1.55}.event-toolbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:12px;padding:11px 0;font-size:11px}.event-toolbar>div{gap:8px}.event-toolbar .button{min-height:34px;padding:7px 10px;font-size:10px}.event-list{min-height:130px;padding:8px 0;overflow:auto}.event-row{border-bottom:1px solid #f0f1f2;grid-template-columns:105px minmax(0,1fr) auto;align-items:center;gap:10px;padding:9px 3px;font-size:11px;display:grid}.event-type{width:fit-content;color:var(--muted);background:#f1f3f4;border-radius:6px;padding:4px 6px;font-size:10px;font-weight:900}.event-first_grade,.event-second_grade{color:var(--blue-dark);background:var(--blue-soft)}.event-word_support,.event-simplify_support,.event-hint_support{color:var(--green-dark);background:var(--green-soft)}.event-technical_failure{color:#9a5d00;background:var(--yellow-soft)}.event-context{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.event-row time{color:var(--quiet);font-variant-numeric:tabular-nums}.event-empty{color:var(--quiet);font-size:12px}.event-dialog-footer{color:var(--quiet);border-top:1px solid var(--line);align-items:flex-start;gap:7px;padding-top:12px;font-size:10px;line-height:1.5}.scope-main{flex-direction:column;align-items:flex-start;gap:17px;padding:70px 0;display:flex}.scope-main h1{max-width:670px;font-size:clamp(30px,5vw,46px);line-height:1.08}.scope-main .lede{max-width:700px;margin:0;font-size:15px}.scope-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px;width:min(100%,760px);margin:9px 0 10px;display:grid}.scope-item{background:var(--surface);border:1px solid var(--line);color:var(--muted);border-radius:15px;flex-direction:column;gap:8px;padding:18px;font-size:12px;line-height:1.55;display:flex}.scope-item strong{color:var(--text);font-size:14px}@media (max-width:1120px){.reading-grid{grid-template-columns:minmax(0,1.15fr) minmax(250px,.85fr)}.original-panel{grid-row:span 2}.task-column{grid-column:2}.reading-progress{width:min(26vw,290px)}}@media (max-width:820px){.page-width,.reading-footer{width:min(100% - 30px,680px)}.topbar,.reading-topbar,.entry-topbar{padding-inline:15px}.topbar-actions .demo-label,.reading-top-actions .local-pill{display:none}.shelf-main{padding-top:30px}.shelf-intro{flex-direction:column;align-items:stretch;gap:18px}.research-context{min-width:0}.continue-card{grid-template-columns:112px minmax(0,1fr)}.story-cover{height:150px}.continue-action{grid-column:2;align-items:flex-start}.page-overview-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.low-pressure-note{flex-direction:column;align-items:flex-start}.shelf-tools{justify-content:flex-start}.reading-topbar{flex-wrap:wrap}.reading-progress{order:3;width:100%}.reading-main{padding-top:15px}.reading-grid{flex-direction:column;display:flex}.original-panel,.support-rail,.task-column{width:100%}.original-panel,.support-rail{min-height:0}.support-action-list{display:flex}.support-action{grid-template-columns:32px minmax(0,1fr);gap:7px}.support-icon{width:32px;height:32px}.support-svg{width:20px;height:20px}.support-arrow{display:none}.lesson-feedback{flex-direction:column;align-items:flex-start}.lesson-feedback p:not(.panel-kicker){max-width:none}.page-navigation{flex-wrap:wrap;justify-content:center}.page-navigation>.button{flex:1}.page-number-list{order:-1;width:100%}.reading-footer{flex-direction:column;gap:3px;padding-bottom:14px}.event-toolbar{flex-direction:column;align-items:flex-start}.scope-main{padding-top:42px}}@media (max-width:540px){.brand-lockup{font-size:21px}.entry-card{padding:28px 21px 23px}.continue-card{grid-template-columns:1fr}.story-cover{height:150px}.continue-action{grid-column:1;align-items:stretch;width:100%}.continue-action .button{width:100%}.page-overview-grid,.support-action-list,.scope-grid{grid-template-columns:1fr}.section-heading{flex-direction:column;align-items:flex-start}.reading-brand-group{flex:1;min-width:0}.reading-top-actions{gap:5px}.original-panel,.support-rail,.task-card,.lesson-feedback,.status-navigator{padding:15px}.story-text p{font-size:15px;line-height:1.8}.event-overlay{padding:10px}.event-dialog{max-height:calc(100vh - 20px);padding:16px}.event-toolbar>div{flex-direction:column;align-items:stretch;width:100%}.event-toolbar .button{width:100%}.event-row{grid-template-columns:1fr auto}.event-context{grid-area:2/1/auto/-1}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}.teacher-shell{min-height:100vh}.teacher-topbar{min-height:70px}.teacher-header-label{color:var(--muted);border-left:1px solid var(--line);letter-spacing:0;align-items:center;margin-left:4px;padding-left:14px;font-size:12px;font-weight:800;display:inline-flex}.teacher-login-label{color:var(--muted);white-space:nowrap;font-size:12px;font-weight:800}.teacher-main{flex-direction:column;gap:14px;padding:16px 0;display:flex}.teacher-steps{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-soft);border-radius:16px;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding:8px;display:grid}.teacher-step{min-width:0;color:var(--quiet);border-radius:11px;align-items:center;gap:10px;padding:10px 12px;display:flex}.teacher-step.active{color:var(--blue-dark);background:var(--blue-soft)}.teacher-step.done{color:var(--green-dark)}.teacher-step-number{width:27px;height:27px;color:var(--quiet);border:1px solid var(--line-strong);border-radius:50%;flex:none;place-items:center;font-size:11px;font-weight:900;display:grid}.teacher-step.active .teacher-step-number,.teacher-step.done .teacher-step-number{color:#fff;background:var(--blue);border-color:var(--blue)}.teacher-step.done .teacher-step-number{background:var(--green);border-color:var(--green)}.teacher-step-copy{flex-direction:column;gap:2px;min-width:0;display:flex}.teacher-step-copy strong{color:currentColor;text-overflow:ellipsis;white-space:nowrap;font-size:12px;line-height:1.25;overflow:hidden}.teacher-step-copy span{color:var(--quiet);text-overflow:ellipsis;white-space:nowrap;font-size:10px;line-height:1.3;overflow:hidden}.teacher-login-card{text-align:center;align-self:center;width:min(100%,520px);padding:34px 40px 28px}.teacher-card-mark,.teacher-loading-mark{width:64px;height:64px;color:var(--green-dark);background:var(--green-soft);border-radius:19px;place-items:center;margin:0 auto 19px;display:grid}.teacher-card-icon{width:35px;height:35px}.teacher-login-card h1,.teacher-welcome-row h1,.teacher-editor-heading h1,.teacher-error-card h1,.teacher-loading h1{color:var(--text);letter-spacing:-.035em;margin:0;line-height:1.12}.teacher-login-card h1{font-size:clamp(26px,5vw,36px)}.teacher-login-card .lede{margin:15px 0 24px;font-size:13px}.teacher-login-form,.teacher-import-form{text-align:left;flex-direction:column;gap:10px;display:flex}.teacher-login-form label,.teacher-import-form label,.teacher-form-grid label,.teacher-task-editor label{color:var(--text);flex-direction:column;gap:6px;font-size:12px;font-weight:900;display:flex}.teacher-login-form input,.teacher-import-form input,.teacher-import-form textarea,.teacher-form-grid input,.teacher-form-grid select,.teacher-form-grid textarea,.teacher-field-block textarea,.teacher-task-editor textarea,.teacher-task-editor input,.teacher-task-editor select{width:100%;min-width:0;color:var(--text);border:1px solid var(--line-strong);background:#fbfcfd;border-radius:10px;padding:10px 11px;font-size:13px;font-weight:600;line-height:1.5}.teacher-login-form input{padding:12px 13px;font-size:14px}.teacher-login-form input:disabled,.teacher-import-form input:disabled,.teacher-import-form textarea:disabled,.teacher-form-grid input:disabled,.teacher-form-grid select:disabled,.teacher-form-grid textarea:disabled,.teacher-field-block textarea:disabled,.teacher-task-editor textarea:disabled,.teacher-task-editor input:disabled,.teacher-task-editor select:disabled{color:var(--muted);background:#f7f8f9}.teacher-boundary-note,.teacher-generator-note,.teacher-assignment-boundary{color:var(--quiet);align-items:flex-start;gap:7px;font-size:10px;line-height:1.55;display:flex}.teacher-boundary-note{border-top:1px solid var(--line);text-align:left;margin-top:18px;padding-top:14px}.teacher-welcome-row,.teacher-editor-heading{justify-content:space-between;align-items:flex-end;gap:24px;display:flex}.teacher-welcome-row h1,.teacher-editor-heading h1{max-width:760px;font-size:clamp(29px,4vw,43px)}.teacher-welcome-row .lede,.teacher-editor-heading .lede{margin:12px 0 0;font-size:13px}.teacher-class-summary{min-width:185px;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:14px;flex-direction:column;gap:4px;padding:14px 16px;display:flex}.teacher-class-summary span,.teacher-class-summary small{color:var(--quiet);font-size:10px}.teacher-class-summary strong{color:var(--blue-dark);font-size:24px;line-height:1}.teacher-notice{color:#8c6d00;background:var(--yellow-soft);border-radius:10px;margin:-5px 0 0;padding:10px 12px;font-size:12px;line-height:1.5}.lesson-unit-toast{z-index:80;color:#2b5331;background:#e9f7ec;border:2px solid #b5ddbf;border-radius:12px;max-width:min(420px,100vw - 40px);margin:0;padding:12px 16px;font-size:13px;font-weight:700;line-height:1.5;animation:.18s ease-out lesson-toast-in;position:fixed;bottom:24px;right:20px;box-shadow:0 8px 24px #2b53312e}@keyframes lesson-toast-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.lesson-unit-saved-btn{background:var(--green);border-color:var(--green-dark);cursor:pointer}.lesson-unit-saved-btn:hover{background:var(--green-dark)}.teacher-import-panel,.teacher-list-panel,.teacher-page-list,.teacher-page-editor,.teacher-publish-bar,.teacher-assignment-panel{padding:20px}.teacher-panel-heading,.teacher-list-heading,.teacher-page-editor-heading,.teacher-task-editor-heading{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.teacher-panel-heading h2,.teacher-list-heading h2,.teacher-page-editor-heading h2,.teacher-task-editor-heading h3,.teacher-publish-bar h2,.teacher-assignment-panel h2{color:var(--text);letter-spacing:-.03em;margin:0;line-height:1.22}.teacher-panel-heading h2,.teacher-list-heading h2,.teacher-assignment-panel h2{font-size:19px}.teacher-page-editor-heading h2{font-size:21px}.teacher-task-editor-heading h3{font-size:16px}.teacher-panel-heading p:not(.panel-kicker),.teacher-assignment-panel p:not(.panel-kicker),.teacher-publish-bar p:not(.panel-kicker){max-width:720px;color:var(--muted);margin:6px 0 0;font-size:12px;line-height:1.55}.teacher-generator-note{color:var(--blue-dark);background:var(--blue-soft);border-radius:10px;margin:16px 0 19px;padding:10px 12px}.teacher-upload-block{border:1px solid var(--line);background:#f8fbfd;border-radius:12px;flex-direction:column;gap:7px;margin-top:2px;padding:12px;display:flex}.teacher-upload-block>label{margin:0}.teacher-upload-block>p{color:var(--quiet);margin:0;font-size:10px;line-height:1.5}.teacher-upload-actions,.teacher-form-action-buttons{flex-wrap:wrap;align-items:center;gap:9px;display:flex}.teacher-upload-actions{justify-content:space-between}.teacher-upload-actions>span{min-width:0;color:var(--muted);overflow-wrap:anywhere;font-size:11px}.teacher-extraction-summary{color:var(--green-dark);background:var(--green-soft);border-radius:8px;margin:0;padding:8px 10px;font-size:10px;line-height:1.5}.teacher-form-grid{gap:12px;display:grid}.teacher-form-grid.two-columns{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-import-form>label,.teacher-field-block,.teacher-task-editor>label{margin-top:2px}.teacher-raw-text{resize:vertical;min-height:220px}.teacher-check-row{align-items:flex-start;line-height:1.5;color:var(--muted)!important;flex-direction:row!important;gap:8px!important;font-size:12px!important;font-weight:700!important;display:flex!important}.teacher-check-row input,.teacher-assignment-row input{height:16px;accent-color:var(--blue);flex:none;margin:2px 0 0;width:16px!important}.teacher-form-actions,.teacher-editor-actions,.teacher-page-action-buttons,.teacher-assignment-actions,.teacher-row-actions{flex-wrap:wrap;align-items:center;gap:9px;display:flex}.teacher-form-actions{justify-content:space-between;align-items:flex-start;margin-top:3px}.teacher-form-actions>span{color:var(--quiet);font-size:10px}.teacher-dashboard-grid,.teacher-dashboard-lower{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px;display:grid}.teacher-dashboard-lower{margin-top:-7px}.teacher-list-heading{border-bottom:1px solid var(--line);align-items:center;padding-bottom:12px}.teacher-list-heading>span{min-width:25px;height:25px;color:var(--blue-dark);background:var(--blue-soft);border-radius:8px;place-items:center;padding:0 6px;font-size:11px;font-weight:900;display:grid}.teacher-list,.teacher-class-list{flex-direction:column;gap:1px;margin-top:6px;display:flex}.teacher-list-row,.teacher-class-row{border-bottom:1px solid #f0f1f2;justify-content:space-between;align-items:center;gap:12px;padding:12px 0;display:flex}.teacher-list-row:last-child,.teacher-class-row:last-child{border-bottom:0}.teacher-list-row>div:first-child,.teacher-class-row>div{flex-direction:column;gap:4px;min-width:0;display:flex}.teacher-list-row strong,.teacher-class-row strong{color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:12px;line-height:1.35;overflow:hidden}.teacher-list-row span:not(.status-chip),.teacher-class-row span:not(.status-chip){color:var(--quiet);font-size:10px;line-height:1.4}.teacher-row-actions{flex:none;justify-content:flex-end}.teacher-list-row .button{min-height:34px;padding:7px 10px;font-size:10px}.teacher-empty{color:var(--quiet);margin:18px 0 4px;font-size:12px;line-height:1.55}.teacher-editor-actions{justify-content:flex-end}.teacher-editor-actions .button{min-height:36px;font-size:11px}.teacher-editor-layout{grid-template-columns:minmax(230px,.34fr) minmax(0,1fr);align-items:start;gap:15px;display:grid}.teacher-page-list{position:sticky;top:16px}.teacher-page-list-help{color:var(--quiet);margin:11px 0 13px;font-size:10px;line-height:1.5}.teacher-page-list-items{flex-direction:column;gap:5px;display:flex}.teacher-page-list-item{width:100%;color:var(--text);text-align:left;cursor:pointer;background:0 0;border-radius:10px;grid-template-columns:29px minmax(0,1fr) 18px;align-items:center;gap:8px;padding:9px 7px;display:grid}.teacher-page-list-item:hover,.teacher-page-list-item.active{background:#f4f9fb}.teacher-page-list-item.active{box-shadow:inset 3px 0 0 var(--blue)}.teacher-page-number{width:27px;height:27px;color:var(--blue-dark);background:var(--blue-soft);border-radius:9px;place-items:center;font-size:11px;font-weight:900;display:grid}.teacher-page-list-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.teacher-page-list-copy strong{color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:11px;line-height:1.3;overflow:hidden}.teacher-page-list-copy span{color:var(--quiet);font-size:10px}.teacher-confirm-dot{color:#fff;background:#d6dbe0;border-radius:50%;place-items:center;width:16px;height:16px;display:grid}.teacher-confirm-dot.confirmed{background:var(--green)}.teacher-unsaved-note,.teacher-validation-note{color:#8c6d00;background:var(--yellow-soft);border-radius:9px;margin:12px 0 0;padding:9px 10px;font-size:10px;line-height:1.5}.teacher-validation-note.positive{color:var(--green-dark);background:var(--green-soft)}.teacher-word-count{color:var(--green-dark);background:var(--green-soft);white-space:nowrap;border-radius:999px;align-items:baseline;gap:4px;padding:7px 9px;font-size:12px;font-weight:900;display:inline-flex}.teacher-word-count small{color:var(--muted);font-size:9px;font-weight:700}.teacher-word-count.out-of-range{color:#8c6d00;background:var(--yellow-soft)}.teacher-field-block{color:var(--text);flex-direction:column;gap:6px;margin-top:15px;font-size:12px;font-weight:900;display:flex}.teacher-field-block textarea{resize:vertical;font-family:Nunito,Noto Sans SC,ui-sans-serif,system-ui,sans-serif;font-size:14px;font-weight:500;line-height:1.7}.teacher-task-editor{background:#fbfef9;border:1px solid #dcefd1;border-radius:14px;flex-direction:column;gap:12px;margin-top:18px;padding:15px;display:flex}.teacher-options-editor{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.teacher-page-actions{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:14px;margin-top:18px;padding-top:15px;display:flex}.teacher-page-action-copy{flex-direction:column;gap:4px;min-width:0;display:flex}.teacher-page-action-copy strong{color:var(--text);font-size:12px}.teacher-page-action-copy span{color:var(--quiet);font-size:10px;line-height:1.45}.teacher-page-action-buttons{flex:none;justify-content:flex-end}.teacher-page-action-buttons .button{min-height:36px;padding:8px 11px;font-size:10px}.teacher-read-only-note,.teacher-published-inline{color:var(--blue-dark);background:var(--blue-soft);border-radius:10px;align-items:flex-start;gap:8px;margin-top:18px;padding:11px 12px;font-size:11px;line-height:1.5;display:flex}.teacher-page-navigation{color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:14px;justify-content:space-between;align-items:center;gap:12px;padding:11px 13px;font-size:11px;font-weight:800;display:flex}.teacher-page-navigation .button{min-height:36px;padding:8px 11px;font-size:10px}.teacher-publish-bar{background:#fbfef9;border-color:#dcefd1;justify-content:space-between;align-items:center;gap:18px;display:flex}.teacher-publish-bar h2{font-size:16px}.teacher-publish-bar .button{flex:none;min-height:44px}.teacher-published-inline{align-items:center}.teacher-published-inline span{color:var(--muted)}.teacher-published-inline .text-button{margin-left:auto}.teacher-assignment-panel{width:min(100% - 48px,1420px);margin:0 auto 54px}.teacher-assignment-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:17px;display:grid}.teacher-assignment-row{min-width:0;color:var(--text);border:1px solid var(--line);cursor:pointer;background:#fbfcfd;border-radius:11px;align-items:center;gap:10px;padding:11px 12px;display:flex}.teacher-assignment-row.assigned{background:var(--green-soft);border-color:#cfe6c2}.teacher-assignment-row>span{flex-direction:column;gap:3px;min-width:0;display:flex}.teacher-assignment-row strong{text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.teacher-assignment-row small{color:var(--quiet);font-size:10px}.teacher-assignment-row>.icon-small{color:var(--green-dark);margin-left:auto}.teacher-assignment-actions{margin-top:17px}.teacher-assignment-boundary{border-top:1px solid var(--line);margin:13px 0 0;padding-top:12px}.teacher-loading,.teacher-error-card{flex-direction:column;align-items:flex-start;gap:14px;padding:60px 0 90px;display:flex}.teacher-loading-mark{margin:0}.teacher-loading h1,.teacher-error-card h1{font-size:clamp(28px,5vw,42px)}.teacher-loading p,.teacher-error-card p{max-width:620px;color:var(--muted);margin:0;font-size:14px;line-height:1.65}.teacher-error-card{background:var(--surface);border:1px solid var(--line);width:min(100%,760px);box-shadow:var(--shadow-soft);border-radius:18px;padding:35px 38px}.teacher-error-icon{color:#bb5b36;width:34px;height:34px}.entry-teacher-link{color:var(--quiet);border-top:1px solid var(--line);justify-content:center;align-items:center;gap:7px;margin-top:20px;padding-top:17px;font-size:11px;display:flex}.entry-teacher-link .text-button{font-size:11px}.teacher-assignment-dashboard-row .teacher-row-actions{align-items:center}.teacher-assignment-dashboard-row .button{min-height:34px;padding:7px 10px;font-size:10px}.teacher-monitor-main{gap:20px}.teacher-monitor-heading{justify-content:space-between;align-items:flex-end;gap:24px;display:flex}.teacher-monitor-heading h1{max-width:820px;color:var(--text);letter-spacing:-.035em;overflow-wrap:anywhere;margin:0;font-size:clamp(29px,4vw,43px);line-height:1.12}.teacher-monitor-heading .lede{max-width:720px;margin:12px 0 0;font-size:13px}.teacher-monitor-back{margin-bottom:9px}.teacher-monitor-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;min-width:0;display:flex}.teacher-monitor-actions .button{min-height:38px;font-size:11px}.teacher-monitor-scope{grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;padding:18px;display:grid}.teacher-monitor-scope>div{flex-direction:column;gap:5px;min-width:0;display:flex}.teacher-monitor-scope span,.teacher-monitor-student-meta span,.teacher-monitor-task-summary>span,.teacher-monitor-support span,.teacher-monitor-technical span,.teacher-monitor-page-status span{color:var(--quiet);font-size:10px;font-weight:800}.teacher-monitor-scope strong,.teacher-monitor-scope small{overflow-wrap:anywhere}.teacher-monitor-scope strong{color:var(--text);font-size:12px;line-height:1.4}.teacher-monitor-scope small{color:var(--muted);font-size:10px;line-height:1.4}.teacher-monitor-boundary,.teacher-monitor-refresh-error,.teacher-monitor-export-notice{border-radius:10px;align-items:flex-start;gap:7px;margin:-5px 0 0;padding:10px 12px;font-size:11px;line-height:1.55;display:flex}.teacher-monitor-boundary{color:var(--blue-dark);background:var(--blue-soft)}.teacher-monitor-refresh-error{color:#a14f31;background:#fff0e9}.teacher-monitor-export-notice{color:var(--green-dark);background:var(--green-soft)}.teacher-monitor-summary{grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;display:grid}.teacher-monitor-summary>div{background:var(--surface);border:1px solid var(--line);min-width:0;box-shadow:var(--shadow-soft);border-radius:14px;flex-direction:column;gap:7px;padding:15px 16px;display:flex}.teacher-monitor-summary span{color:var(--muted);font-size:10px;line-height:1.35}.teacher-monitor-summary strong{color:var(--blue-dark);font-size:25px;line-height:1}.teacher-monitor-summary .has-failure strong{color:#bb5b36}.teacher-monitor-section-heading{justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:11px;display:flex}.teacher-monitor-section-heading h2{color:var(--text);letter-spacing:-.03em;margin:0;font-size:20px;line-height:1.25}.teacher-monitor-section-heading>span{color:var(--quiet);font-size:11px;font-weight:800}.teacher-monitor-students{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.teacher-monitor-student{min-width:0;padding:18px}.teacher-monitor-student-heading,.teacher-monitor-subheading{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.teacher-monitor-student-heading h3{color:var(--text);letter-spacing:-.03em;margin:0;font-size:20px}.teacher-monitor-status{text-align:center;border-radius:999px;align-items:center;max-width:50%;padding:7px 10px;font-size:11px;font-weight:900;line-height:1.2;display:inline-flex}.teacher-monitor-status.no_activity_unknown{color:#6f7780;background:#f1f3f5}.teacher-monitor-status.in_progress{color:var(--blue-dark);background:var(--blue-soft)}.teacher-monitor-status.completed{color:var(--green-dark);background:var(--green-soft)}.teacher-monitor-student-meta{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:15px;display:grid}.teacher-monitor-student-meta>div{background:#fbfcfd;border-radius:10px;flex-direction:column;gap:4px;min-width:0;padding:10px 11px;display:flex}.teacher-monitor-student-meta strong{overflow-wrap:anywhere;color:var(--text);font-size:12px;line-height:1.35}.teacher-monitor-task-summary{background:#f8fbfd;border-radius:10px;flex-direction:column;gap:5px;margin-top:13px;padding:10px 11px;display:flex}.teacher-monitor-task-summary strong{color:var(--text);font-size:11px;line-height:1.5}.teacher-monitor-supports{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:10px;display:grid}.teacher-monitor-support{background:#fbfef9;border:1px solid #e3f0dc;border-radius:10px;flex-direction:column;gap:5px;min-width:0;padding:10px;display:flex}.teacher-monitor-support strong{overflow-wrap:anywhere;color:var(--green-dark);font-size:10px;line-height:1.45}.teacher-monitor-technical{color:var(--muted);background:#f7f8f9;border-radius:10px;justify-content:space-between;align-items:flex-start;gap:12px;margin-top:10px;padding:10px 11px;display:flex}.teacher-monitor-technical strong{color:var(--muted);text-align:right;font-size:10px;line-height:1.45}.teacher-monitor-technical.has-failure{color:#a14f31;background:#fff0e9}.teacher-monitor-technical.has-failure strong{color:#a14f31}.teacher-monitor-page-statuses{border-top:1px solid var(--line);margin-top:14px;padding-top:13px}.teacher-monitor-subheading{align-items:baseline}.teacher-monitor-subheading>span{color:var(--text);font-size:11px;font-weight:900}.teacher-monitor-subheading small{color:var(--quiet);text-align:right;font-size:10px;line-height:1.4}.teacher-monitor-page-grid{grid-template-columns:repeat(auto-fit,minmax(135px,1fr));gap:7px;margin-top:9px;display:grid}.teacher-monitor-page-status{background:#fbfcfd;border:1px solid #eef0f2;border-radius:9px;flex-direction:column;gap:4px;min-width:0;padding:8px 9px;display:flex}.teacher-monitor-page-status strong{overflow-wrap:anywhere;color:var(--blue-dark);font-size:10px;line-height:1.35}.teacher-monitor-error-actions{flex-wrap:wrap;gap:9px;display:flex}@media (max-width:900px){.teacher-welcome-row,.teacher-editor-heading,.teacher-publish-bar{flex-direction:column;align-items:flex-start}.teacher-class-summary{width:100%}.teacher-editor-layout{grid-template-columns:1fr}.teacher-page-list{position:static}.teacher-page-list-items{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.teacher-assignment-list{grid-template-columns:1fr}.teacher-monitor-heading{flex-direction:column;align-items:flex-start}.teacher-monitor-actions{justify-content:flex-start;width:100%}.teacher-monitor-scope{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-monitor-summary{grid-template-columns:repeat(3,minmax(0,1fr))}.teacher-monitor-students{grid-template-columns:1fr}}@media (max-width:650px){.teacher-topbar{flex-direction:column;align-items:flex-start;gap:10px}.teacher-topbar .topbar-actions{justify-content:space-between;width:100%}.teacher-header-label{display:none}.teacher-main{padding-top:20px}.teacher-steps{gap:4px;padding:5px}.teacher-step{justify-content:center;padding:9px 4px}.teacher-step-copy span{display:none}.teacher-step-copy strong{font-size:10px}.teacher-step-number{width:23px;height:23px;font-size:10px}.teacher-login-card{padding:28px 20px 23px}.teacher-form-grid.two-columns,.teacher-dashboard-grid,.teacher-dashboard-lower,.teacher-options-editor{grid-template-columns:1fr}.teacher-import-panel,.teacher-list-panel,.teacher-page-list,.teacher-page-editor,.teacher-publish-bar,.teacher-assignment-panel{padding:15px}.teacher-page-list-items{grid-template-columns:1fr}.teacher-list-row,.teacher-class-row,.teacher-form-actions,.teacher-page-actions{flex-direction:column;align-items:flex-start}.teacher-list-row>div,.teacher-row-actions,.teacher-form-actions .button,.teacher-page-action-buttons,.teacher-page-action-buttons .button,.teacher-publish-bar .button,.teacher-assignment-actions .button{width:100%}.teacher-row-actions,.teacher-page-action-buttons,.teacher-assignment-actions{flex-direction:column;align-items:stretch}.teacher-page-editor-heading{flex-direction:column}.teacher-word-count{align-self:flex-start}.teacher-page-navigation{flex-wrap:wrap;justify-content:center}.teacher-page-navigation .button{flex:1}.teacher-page-navigation>span{text-align:center;order:-1;width:100%}.teacher-published-inline{flex-wrap:wrap}.teacher-published-inline .text-button{width:100%;margin-left:0}.teacher-assignment-panel{width:min(100% - 30px,680px);margin-bottom:30px}.teacher-assignment-dashboard-row .teacher-row-actions{align-items:stretch}.teacher-monitor-actions{grid-template-columns:1fr;width:100%;display:grid}.teacher-monitor-actions .button,.teacher-monitor-error-actions .button{width:100%}.teacher-monitor-scope,.teacher-monitor-summary,.teacher-monitor-student-meta,.teacher-monitor-supports{grid-template-columns:1fr}.teacher-monitor-summary>div{flex-direction:row;justify-content:space-between;align-items:center}.teacher-monitor-summary strong{font-size:21px}.teacher-monitor-section-heading,.teacher-monitor-subheading{flex-direction:column;align-items:flex-start}.teacher-monitor-subheading small{text-align:left}.teacher-monitor-page-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.entry-teacher-link{text-align:left;flex-direction:column;align-items:flex-start}}.lesson-prep-panel{margin:.6rem 0;padding:.85rem}.lesson-steps{gap:.5rem;margin:1rem 0 1.25rem;display:flex}.lesson-step{flex:1;align-items:center;gap:.5rem;display:flex}.lesson-step-number{background:var(--page);border:1px solid var(--line-strong);width:24px;height:24px;color:var(--muted);border-radius:50%;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;display:flex}.lesson-step.active .lesson-step-number{background:var(--blue);border-color:var(--blue);color:#fff}.lesson-step.done .lesson-step-number{background:var(--green);border-color:var(--green);color:#fff}.lesson-step-copy{color:var(--muted);font-size:.85rem;font-weight:600}.lesson-step.active .lesson-step-copy{color:var(--text)}.lesson-stage-lede{color:var(--muted);margin:0 0 1rem;font-size:.95rem}.lesson-create-form{flex-direction:column;gap:1rem;display:flex}.lesson-range-fields{gap:.75rem;display:flex}.lesson-range-fields label{color:var(--muted);flex-direction:column;flex:1;gap:.35rem;font-size:.85rem;font-weight:600;display:flex}.lesson-create-actions{justify-content:flex-end;align-items:center;gap:.75rem;display:flex}.translation-cards-field{border:2px solid var(--border-duo);background:var(--surface-2);border-radius:12px;flex-direction:column;gap:.5rem;margin:.85rem 0 .15rem;padding:.75rem .85rem;display:flex}.translation-cards-field label{color:var(--text-strong);flex-direction:column;gap:.2rem;font-weight:800;display:flex}.translation-cards-field label small{color:var(--muted);font-weight:400}.translation-cards-controls{align-items:center;gap:.6rem;display:flex}.translation-cards-controls input{width:6rem;font:inherit;border:2px solid var(--border-duo);border-radius:10px;padding:.45rem .6rem;font-weight:700}.translation-cards-reason{color:#2e7d32;margin:0;font-size:.82rem;font-weight:700}.lesson-generate-stage{flex-direction:column;gap:1rem;display:flex}.lesson-generate-actions{gap:.75rem;display:flex}.lesson-review-stage{flex-direction:column;gap:1rem;display:flex}.lesson-review-progress{color:var(--muted);align-items:baseline;gap:.5rem;font-size:.9rem;display:flex}.lesson-review-progress strong{color:var(--text);font-size:1.1rem}.lesson-unit-editor{flex-direction:column;gap:.6rem;display:flex}.lesson-unit-editor-heading{flex:none;justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.lesson-unit-editor-heading .text-button{padding:0;font-size:.8rem;line-height:1}.lesson-unit-editor-heading h3{margin:.1rem 0 0;font-size:1rem;line-height:1.2}.lesson-unit-field-group{align-items:flex-end;gap:.75rem;display:flex}.lesson-unit-field-group>.lesson-unit-field{flex:1}.lesson-unit-field{color:var(--muted);flex-direction:column;gap:.35rem;font-size:.85rem;font-weight:600;display:flex}.lesson-unit-field input,.lesson-unit-field textarea{color:var(--text);font-weight:400}.lesson-unit-checkpoint{border:1px solid var(--line);background:var(--page);border-radius:.6rem;flex-direction:column;gap:.7rem;padding:.9rem;display:flex}.lesson-unit-options{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:.4rem;display:grid}.lesson-unit-option-editable{border:1px solid var(--line);background:var(--surface);border-radius:.4rem;align-items:center;gap:.5rem;min-width:0;padding:.4rem .55rem;display:flex}.lesson-unit-option-editable>span{color:var(--blue-dark);flex:none;font-weight:700}.lesson-unit-option-editable input,.lesson-unit-option-editable textarea{width:100%;min-width:0;color:var(--text);resize:none;background:0 0;border:none;flex:1;padding:0;font-size:.9rem;font-weight:400;line-height:1.4}.lesson-unit-nav{justify-content:space-between;align-items:center;gap:1rem;display:flex}.lesson-unit-nav-status{align-items:center;gap:.75rem;display:flex}.lesson-unit-nav-status strong{font-size:.9rem}.lesson-unit-dirty-hint{color:var(--coral);align-items:center;gap:.4rem;margin:0;font-size:.85rem;display:flex}.lesson-publish-bar{border:1px solid var(--line);background:var(--blue-soft);border-radius:.6rem;justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 1rem;display:flex}.lesson-publish-bar div{flex-direction:column;gap:.2rem;display:flex}.lesson-publish-bar span{color:var(--muted);font-size:.85rem}.lesson-reset-link{align-self:flex-start;margin-top:.5rem}.lesson-publish-stage{text-align:center;flex-direction:column;align-items:center;gap:.75rem;padding:1.5rem 0;display:flex}.lesson-publish-check{color:var(--green-dark)}.lesson-publish-done h3{margin:.2rem 0 .25rem}.lesson-publish-done p{color:var(--muted);margin:0}.teacher-section-nav{border-bottom:1px solid var(--line);gap:.75rem;margin:0 0 .5rem;display:flex}.teacher-section-tab{cursor:pointer;text-align:left;font:inherit;color:var(--muted);background:0 0;border:none;border-bottom:3px solid #0000;flex-direction:column;gap:.15rem;padding:.7rem 1rem .85rem;display:flex}.teacher-section-tab strong{color:var(--text);font-size:1rem}.teacher-section-tab span{color:var(--muted);font-size:.78rem}.teacher-section-tab.active{border-bottom-color:var(--blue)}.teacher-section-tab.active span{color:var(--blue-dark)}.teacher-section-body{flex-direction:column;gap:1rem;display:flex}.book-split-panel{margin:1rem 0;padding:1.25rem}.book-split-controls{flex-wrap:wrap;align-items:center;gap:.75rem;margin:.5rem 0;display:flex}.book-split-controls select{min-width:260px}.book-split-units{flex-direction:column;gap:.5rem;margin:.75rem 0;display:flex}.book-split-unit{border:1px solid var(--line);border-radius:.5rem;align-items:center;gap:.75rem;padding:.6rem .75rem;display:flex}.book-split-unit strong{flex:1}.lesson-select-stage,.lesson-tasks-stage{flex-direction:column;gap:1rem;display:flex}.lesson-select-list{flex-direction:column;gap:.5rem;display:flex}.lesson-select-row{border:1px solid var(--line);cursor:pointer;border-radius:.5rem;align-items:center;gap:.75rem;padding:.7rem .85rem;display:flex}.lesson-select-row.selected{border-color:var(--blue);background:var(--blue-soft)}.lesson-select-number{color:var(--blue-dark);font-size:.85rem;font-weight:700}.lesson-select-copy{flex-direction:column;gap:.1rem;display:flex}.lesson-select-copy small{color:var(--muted)}.lesson-tasks-heading{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.lesson-tasks-actions{gap:.6rem;display:flex}.lesson-unit-excerpt{color:var(--muted);margin:0;font-size:.9rem;line-height:1.5}.lesson-task-editor{border:1px solid var(--line);background:var(--page);border-radius:.6rem;flex-direction:column;gap:.7rem;padding:.85rem;display:flex}.lesson-preview{border:1px solid var(--line);background:var(--page);border-radius:.7rem;padding:1rem}.lesson-preview-unit{border-top:1px solid var(--line);padding:1rem 0}.lesson-preview-unit:first-of-type{border-top:none;padding-top:.5rem}.lesson-preview-unit h3{margin:0 0 .5rem}.lesson-preview-unit p{margin:0 0 .6rem;line-height:1.65}.lesson-preview-task{border:1px solid var(--line-strong);background:var(--surface);border-radius:.5rem;margin-top:.75rem;padding:.75rem}.lesson-preview-options{grid-template-columns:1fr 1fr;gap:.4rem;margin-top:.5rem;display:grid}.lesson-preview-option{border:1px solid var(--line);border-radius:.4rem;gap:.5rem;padding:.4rem .55rem;font-size:.9rem;display:flex}.lesson-preview-option span:first-child{color:var(--blue-dark);font-weight:700}:root{--line-strong-2:#cfd6de;--surface-2:#f3f5f7}.button{letter-spacing:.01em;border-radius:14px;min-height:46px;padding:12px 20px;font-size:14px;font-weight:800;box-shadow:inset 0 -4px #0000001f}.button.primary{background:var(--green);box-shadow:inset 0 -4px 0 var(--green-dark)}.button.primary:hover:not(:disabled){box-shadow:inset 0 -4px #3e9300,0 6px 14px #58cc023d}.blue-button{background:var(--blue);box-shadow:inset 0 -4px 0 var(--blue-dark)}.quiet-button{color:var(--blue-dark);border:2px solid var(--line-strong);background:#fff;font-weight:800;box-shadow:inset 0 -3px #dfe2e5}.text-button{color:var(--blue-dark);font-weight:800}.panel{border:2px solid var(--line-strong);border-radius:20px;box-shadow:0 2px #00000008}.status-chip{border:2px solid #0000;border-radius:10px;padding:4px 10px;font-weight:800}.status-chip.blue{background:var(--blue-soft);color:var(--blue-dark);border-color:#a4d7ef}.status-chip.green{background:var(--green-soft);color:var(--green-dark);border-color:#c7e9a2}.teacher-login-form input,.teacher-import-form input,.teacher-import-form textarea,.teacher-form-grid input,.teacher-form-grid select,.teacher-form-grid textarea,.teacher-field-block textarea,.teacher-task-editor textarea,.teacher-task-editor input,.teacher-task-editor select,.lesson-unit-field input,.lesson-unit-field textarea,.lesson-unit-field select,.lesson-unit-option-editable input,.lesson-range-fields input,.lesson-select-list input[type=checkbox],.book-split-controls select,.book-import-stage input,.book-import-stage select,.book-import-stage textarea{color:#2b333b;background:#fff;font-weight:700;border:2px solid var(--line-strong-2)!important;border-radius:12px!important;padding:11px 12px!important;font-size:14px!important}.teacher-check-row input[type=checkbox]{width:22px;height:22px;accent-color:var(--green)}.teacher-section-nav{border-bottom:none;gap:8px}.teacher-section-tab{border:2px solid var(--line-strong);background:#fff;border-radius:16px;flex:1;margin-bottom:6px;padding:14px 16px;box-shadow:0 2px #0000000a}.teacher-section-tab strong{font-size:16px;font-weight:800}.teacher-section-tab span{font-size:12px;font-weight:600}.teacher-section-tab:hover{background:var(--surface-2)}.teacher-section-tab.active{background:var(--green);border-color:var(--green-dark);box-shadow:inset 0 -3px 0 var(--green-dark)}.teacher-section-tab.active strong,.teacher-section-tab.active span{color:#fff}.lesson-step-number{border:2px solid var(--line-strong);background:#fff;width:28px;height:28px;font-size:14px;font-weight:800}.lesson-step.active .lesson-step-number{background:var(--blue);border-color:var(--blue-dark);box-shadow:inset 0 -2px 0 var(--blue-dark)}.lesson-step.done .lesson-step-number{background:var(--green);border-color:var(--green-dark)}.lesson-step-copy{font-size:14px;font-weight:800}.lesson-unit-card,.book-split-unit,.lesson-select-row{border-radius:14px;border:2px solid var(--line-strong)!important}.lesson-select-row.selected{background:var(--blue-soft);box-shadow:0 2px #1cb0f626;border-color:var(--blue)!important}.lesson-unit-option-editable{border-radius:10px;border:2px solid var(--line-strong)!important}.lesson-unit-option-editable>span{font-weight:800}.lesson-unit-checkpoint{border:2px solid var(--line-strong);background:var(--surface-2);border-radius:14px}.lesson-unit-heading .lesson-unit-number,.book-split-unit .lesson-unit-number,.lesson-select-number{color:var(--blue-dark);font-weight:800}.teacher-panel-heading h2,.book-prep-panel h2,.lesson-prep-panel h2{font-weight:800}.panel-kicker{color:var(--blue-dark);letter-spacing:.02em;margin:0;font-size:.74rem;font-weight:800}.lesson-unit-field input[type=file]{border-style:dashed!important;padding:8px!important}:root{--border-duo:#c0c9d2}.panel,.lesson-unit-card,.book-split-unit,.lesson-select-row,.lesson-unit-option-editable,.lesson-unit-checkpoint{border-color:var(--border-duo)!important}.panel{box-shadow:0 3px #0000000d}.lesson-unit-field input,.lesson-unit-field textarea,.lesson-unit-field select,.lesson-unit-option-editable input,.lesson-range-fields input,.book-split-controls select,.book-import-stage input,.book-import-stage select{border-color:var(--border-duo)!important}.teacher-check-row input[type=checkbox],.lesson-select-row input[type=checkbox]{width:24px;height:24px;accent-color:var(--green)}input[type=file]{color:var(--muted)}input[type=file]::file-selector-button{font:inherit;color:#fff;background:var(--blue);cursor:pointer;box-shadow:inset 0 -3px 0 var(--blue-dark);border:none;border-radius:10px;margin-right:12px;padding:9px 16px;font-weight:800}input[type=file]::file-selector-button:hover{background:#26b6f5}.teacher-check-row input[type=checkbox],.lesson-select-row input[type=checkbox]{transform-origin:0;width:20px;height:20px;accent-color:var(--green);margin-right:10px;transform:scale(1.5)}.teacher-list-heading>span{color:#fff;background:var(--blue);border:2px solid var(--blue-dark);box-shadow:inset 0 -2px 0 var(--blue-dark);border-radius:999px;min-width:28px;height:28px;font-weight:800}.lesson-step-number{border-width:2px;box-shadow:0 2px #00000014}.teacher-boundary-note{color:#4a535c}.teacher-boundary-note span{font-weight:600}.book-file-input-hidden{display:none}.book-file-picker{align-items:center;gap:12px;display:flex}.book-file-picker span{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-weight:600;overflow:hidden}.lesson-unit-list{flex-direction:column;gap:10px;display:flex}.lesson-unit-list-item{text-align:left;border:2px solid var(--border-duo);cursor:pointer;background:#fff;border-radius:16px;align-items:center;gap:14px;width:100%;padding:14px 16px;transition:transform 80ms,box-shadow 80ms;display:flex;box-shadow:0 2px #0000000d}.lesson-unit-list-item:hover{border-color:#9fb2c0;transform:translateY(-1px);box-shadow:0 4px #0000000f}.lesson-unit-number{background:var(--blue-soft);min-width:46px;height:34px;color:var(--blue-dark);white-space:nowrap;border:2px solid #a4d7ef;border-radius:10px;justify-content:center;align-items:center;padding:0 10px;font-size:13px;font-weight:800;display:inline-flex}.lesson-unit-list-copy{flex-direction:column;flex:1;gap:3px;min-width:0;display:flex}.lesson-unit-list-copy strong{color:#2b333b;text-overflow:ellipsis;white-space:nowrap;font-size:15px;font-weight:800;overflow:hidden}.lesson-unit-list-copy small{color:var(--muted);font-size:12px;font-weight:600}.lesson-unit-chevron{color:#9fb2c0;transform:rotate(180deg)}.lesson-unit-actions{align-items:center;gap:.75rem;display:flex}.lesson-unit-body{background:var(--surface-2);border:2px solid var(--border-duo);color:#2b333b;border-radius:12px;max-height:260px;padding:.9rem;font-size:.95rem;line-height:1.6;overflow-y:auto}.lesson-unit-body p{margin:0 0 .7rem}.lesson-unit-body p:last-child{margin-bottom:0}.pdf-page-view{flex-direction:column;align-items:center;gap:10px;height:100%;min-height:0;display:flex}.pdf-page-view-status{border:2px dashed var(--border-duo);background:var(--surface-2);color:var(--muted);border-radius:14px;padding:1.25rem;font-weight:600}.pdf-page-stage{flex:auto;justify-content:center;align-items:center;width:100%;min-height:0;display:flex;overflow:auto}.pdf-page-stage canvas{border:2px solid var(--border-duo);background:#fff;border-radius:10px;max-width:100%;height:auto;display:block;box-shadow:0 3px #0000000f}.pdf-page-stage.is-rendering canvas{opacity:.7}.pdf-page-toolbar{flex:none;justify-content:center;align-items:center;gap:14px;display:flex}.pdf-page-nav{color:var(--blue-dark);border:2px solid var(--border-duo);cursor:pointer;background:#fff;border-radius:12px;align-items:center;gap:6px;padding:8px 14px;font-weight:800;display:inline-flex;box-shadow:inset 0 -3px #dfe2e5}.pdf-page-nav:hover:not(:disabled){background:var(--surface-2)}.pdf-page-nav:disabled{opacity:.4;cursor:default}.pdf-page-indicator{color:var(--muted);text-align:center;min-width:160px;font-size:13px;font-weight:700}.lesson-unit-split{flex:auto;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);align-items:stretch;gap:18px;min-height:0;display:grid}@media (max-width:900px){.lesson-unit-split{grid-template-columns:1fr}}.lesson-unit-page-col{min-width:0;min-height:0}.lesson-unit-task-col{flex-direction:column;gap:10px;min-width:0;display:flex}.lesson-unit-layout .lesson-unit-page-col,.lesson-unit-layout .reader-side-column{min-width:0}.lesson-unit-preview-bar{color:var(--blue-dark);background:#eef7ff;border:1.5px solid #1cb0f640;border-radius:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:.5rem;padding:.4rem .7rem;font-size:.8rem;font-weight:700;display:flex}.lesson-unit-preview-bar .reader-help-copy{align-items:center;gap:.4rem;min-width:0;display:inline-flex}.lesson-unit-preview-bar .icon-small{color:var(--blue);flex:none}.lesson-unit-preview-bar .reader-help-actions{flex-wrap:wrap;align-items:center;gap:.3rem;display:inline-flex}.lesson-unit-preview-bar .reader-float-action{padding:.28rem .55rem;font-size:.78rem}@media (max-width:820px){.lesson-unit-preview-bar{flex-direction:column;align-items:flex-start}}.lesson-unit-preview-results{flex-direction:column;gap:.5rem;margin-top:.6rem;display:flex}.lesson-unit-preview-result{border:2px solid var(--border-duo);background:#f6fcff;border-radius:12px;padding:.6rem .75rem}.lesson-unit-preview-result.word{border-left:5px solid var(--blue)}.lesson-unit-preview-result.zh{border-left:5px solid var(--green-dark)}.lesson-unit-preview-tag{background:var(--blue-soft);color:var(--blue-dark);border-radius:999px;margin-bottom:.25rem;padding:.1rem .5rem;font-size:.72rem;font-weight:800;display:inline-block}.lesson-unit-preview-result.zh .lesson-unit-preview-tag{background:var(--green-soft,#eaf3de);color:var(--green-dark)}.lesson-unit-preview-result p{color:#333;margin:0;font-size:.86rem;line-height:1.55}.lesson-unit-task-hint{color:var(--muted);align-items:center;gap:6px;margin:0;font-size:12px;font-weight:600;display:flex}.lesson-unit-checkpoint{gap:.4rem;padding:.6rem}.lesson-unit-checkpoint .lesson-unit-field input,.lesson-unit-checkpoint .lesson-unit-field textarea,.lesson-unit-checkpoint .lesson-unit-field select,.lesson-unit-checkpoint .lesson-unit-option-editable input,.lesson-unit-checkpoint .lesson-unit-option-editable textarea{border-radius:8px!important;padding:5px 8px!important;font-size:13px!important}.lesson-unit-checkpoint .lesson-unit-option-editable textarea{resize:none;min-height:20px;line-height:1.35;overflow:hidden}.lesson-unit-checkpoint .lesson-unit-options{gap:.3rem}.lesson-unit-checkpoint .lesson-unit-option-editable{padding:.2rem .35rem}.lesson-unit-checkpoint .lesson-unit-field-group{gap:.5rem}.lesson-unit-text-fallback{border:2px solid var(--border-duo);background:var(--surface-2);border-radius:12px;flex:none;padding:.2rem .7rem}.lesson-unit-text-fallback summary{cursor:pointer;color:var(--blue-dark);padding:.2rem 0;font-size:.85rem;font-weight:800}.lesson-unit-text-fallback .lesson-unit-body{max-height:220px;margin-top:.5rem}.reader-topbar{z-index:30;border-bottom:2px solid var(--line-strong);background:#fffffff5;justify-content:space-between;align-items:center;gap:1rem;padding:.7rem 1.25rem;display:flex;position:sticky;top:0}.reader-brand-group{align-items:center;gap:.65rem;min-width:0;display:flex}.reader-brand-group>div{flex-direction:column;min-width:0;display:flex}.reader-brand-group strong{text-overflow:ellipsis;white-space:nowrap;font-size:.98rem;overflow:hidden}.reader-brand-group span{color:var(--muted);font-size:.78rem}.reader-top-progress{align-items:center;gap:.6rem;min-width:260px;display:flex}.reader-top-progress .progress-line{flex:1}.reader-top-progress b{font-weight:800}.reader-top-actions{align-items:center;gap:.6rem;display:flex}.reader-main{padding:1rem 0 2rem}.reader-action-notice,.reader-pdf-fallback-note{border:2px solid var(--border-duo);color:#6b4e00;background:#fff8e6;border-radius:12px;align-items:center;gap:.45rem;margin:0 0 .75rem;padding:.6rem .85rem;font-size:.86rem;font-weight:700;display:flex}.reader-layout{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr) minmax(0,.72fr);align-items:start;gap:1rem;display:grid}@media (max-width:1180px){.reader-layout{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr)}.reader-task-column{grid-column:1/-1;grid-template-columns:1fr 1fr;gap:1rem;display:grid}}@media (max-width:820px){.reader-topbar{flex-wrap:wrap;gap:.5rem}.reader-top-progress{order:3;width:100%;min-width:0}.reader-layout{grid-template-columns:1fr}.reader-task-column{flex-direction:column;grid-column:auto;display:flex}}.reader-book-panel,.reader-unit-panel,.reader-task-card,.reader-feedback{padding:.65rem .8rem}.reader-book-heading,.reader-unit-nav{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.6rem;display:flex}.reader-book-heading h1{flex:1;align-items:baseline;gap:.45rem;min-width:0;margin:0;font-size:1.05rem;line-height:1.25;display:flex}.reader-book-kicker{color:var(--blue-dark);letter-spacing:.02em;flex:none;font-size:.74rem;font-weight:800}.reader-book-title{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.reader-book-heading .panel-kicker{margin:0 .45rem 0 0}.reader-unit-badge{color:var(--blue-dark);background:var(--blue-soft);white-space:nowrap;border:2px solid #a4d7ef;border-radius:10px;padding:3px 9px;font-size:.76rem;font-weight:800}.reader-help-bar{color:var(--blue-dark);background:#eef7ff;border:1.5px solid #1cb0f640;border-radius:14px;flex-wrap:wrap;align-items:center;gap:.45rem;margin:.5rem 0 0;padding:.4rem .7rem;font-size:.8rem;font-weight:700;display:flex}.reader-help-copy{flex:1;align-items:center;gap:.35rem;min-width:0;display:inline-flex}.reader-help-copy .icon-small{color:var(--blue);flex:none}.reader-help-actions{flex:none;align-items:center;gap:.3rem;display:inline-flex}.reader-float-action{color:var(--blue-dark);font:inherit;cursor:pointer;background:#f2f8ff;border:none;border-radius:999px;align-items:center;gap:.25rem;padding:.3rem .6rem;font-size:.78rem;font-weight:800;transition:background .12s,transform 50ms;display:inline-flex}.reader-float-action.primary{background:var(--blue);color:#fff}.reader-float-action:disabled{opacity:.45;cursor:default}.reader-float-action:not(:disabled):active{transform:translateY(1px)}.reader-float-close{color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:1.5rem;height:1.5rem;padding:0;font-size:1rem;line-height:1;display:inline-flex}.reader-float-close:hover{color:#4a535c;background:#0000000f}.reader-help-notice{color:#9a6b00;flex-basis:100%;font-size:.78rem;font-weight:700}@media (max-width:820px){.reader-help-bar{border-radius:12px;font-size:.75rem}.reader-help-copy{flex-basis:100%}}.reader-pdf-stage{background:var(--surface-2);border:2px solid var(--border-duo);border-radius:14px;justify-content:center;max-height:74vh;margin:.4rem 0;padding:.5rem;display:flex;overflow:auto}.reader-pdf-stage canvas{border-radius:8px;max-width:100%;height:auto;display:block;box-shadow:0 4px #00000014}.reader-pdf-stage.is-rendering canvas{opacity:.72}.reader-pdf-status{text-align:center;color:var(--muted);border:2px dashed var(--border-duo);background:var(--surface-2);border-radius:14px;margin:.7rem 0;padding:1.4rem;font-weight:700}.reader-book-toolbar{flex-wrap:wrap;justify-content:center;align-items:center;gap:.8rem;display:flex}.reader-book-toolbar>span{color:var(--muted);text-align:center;min-width:130px;font-size:.86rem;font-weight:700}.reader-unit-chips{flex-wrap:wrap;gap:.35rem;margin-top:.45rem;display:flex}.reader-unit-chip{border:2px solid var(--border-duo);cursor:pointer;background:#fff;border-radius:999px;align-items:center;gap:.3rem;padding:.25rem .55rem;font-size:.75rem;font-weight:800;display:inline-flex}.reader-unit-chip.active{background:var(--green);border-color:var(--green-dark);color:#fff}.reader-unit-chip .status-dot{width:9px;height:9px}.reader-paragraph{border:2px solid var(--border-duo);background:#fff;border-radius:14px;padding:.6rem .75rem .65rem;position:relative}.reader-paragraph p{-webkit-user-select:text;user-select:text;margin:.35rem 0 0;font-size:.98rem;line-height:1.65}.reader-paragraph-actions{justify-content:flex-end;display:flex}.reader-simplify-button{background:var(--blue-soft);color:var(--blue-dark);cursor:pointer;border:2px solid #a4d7ef;border-radius:10px;align-items:center;gap:.35rem;padding:.3rem .6rem;font-size:.78rem;font-weight:800;display:inline-flex}.reader-simplify-button:disabled{opacity:.5;cursor:default}.reader-selection-help{color:var(--muted);align-items:flex-start;gap:.45rem;margin-top:.75rem;font-size:.8rem;line-height:1.5;display:flex}.reader-explain-popover{z-index:5;border:2px solid var(--blue);background:#fff;border-radius:16px;margin-top:.75rem;padding:.7rem;position:sticky;bottom:.25rem;box-shadow:0 8px 22px #1cb0f62e}.reader-explain-heading,.reader-simplify-heading{justify-content:space-between;align-items:flex-start;gap:.5rem;display:flex}.reader-explain-heading>div{flex-direction:column;gap:.2rem;min-width:0;display:flex}.reader-explain-heading span{color:var(--blue-dark);align-items:center;gap:.3rem;font-size:.8rem;font-weight:800;display:inline-flex}.reader-explain-heading strong{overflow-wrap:anywhere;font-size:.95rem}.reader-explain-result{margin:.55rem 0;line-height:1.6}.reader-explain-notice,.reader-simplify-notice,.reader-task-hint-notice{color:#9a6b00;margin:.4rem 0 0;font-size:.82rem;font-weight:700}.reader-support-source{color:var(--muted);margin-top:.4rem;font-size:.72rem;font-weight:700;display:inline-block}.reader-simplify-sticky{border:2px solid var(--green);background:#f4ffe9;border-radius:14px;margin-top:.6rem;padding:.6rem}.reader-simplify-heading>div{color:var(--green-dark);align-items:center;gap:.35rem;font-size:.85rem;font-weight:800;display:inline-flex}.reader-simplify-original{color:var(--muted);max-height:110px;margin:.45rem 0;font-size:.8rem;line-height:1.5;overflow:auto}.reader-simplify-rounds{flex-direction:column;gap:.4rem;display:flex}.reader-simplify-round{border:2px solid var(--border-duo);background:#fff;border-radius:12px;padding:.5rem .6rem}.reader-simplify-round.is-translation{background:#fffaf0;border-color:#ffd166}.reader-simplify-round-label{color:var(--green-dark);margin-bottom:.25rem;font-size:.74rem;font-weight:800;display:block}.reader-simplify-round.is-translation .reader-simplify-round-label{color:#9a6b00}.reader-simplify-round p{margin:0;line-height:1.6}.reader-simplify-actions{flex-wrap:wrap;gap:.5rem;margin-top:.55rem;display:flex}.reader-task-column{flex-direction:column;gap:1rem;display:flex}.reader-task-heading{justify-content:space-between;align-items:flex-start;gap:.6rem;display:flex}.reader-task-heading h2{margin:.1rem 0 0;font-size:1.05rem}.reader-task-prompt{margin:.6rem 0;font-weight:700;line-height:1.55}.reader-task-choices{flex-direction:column;gap:.45rem;display:flex}.reader-task-choice{text-align:left;border:2px solid var(--border-duo);font:inherit;cursor:pointer;background:#fff;border-radius:12px;align-items:center;gap:.6rem;padding:.6rem .7rem;font-weight:700;display:flex}.reader-task-choice:hover:not(:disabled){border-color:var(--blue)}.reader-task-choice.selected{border-color:var(--blue);background:var(--blue-soft);box-shadow:0 2px #1cb0f626}.reader-task-choice:disabled{opacity:.7;cursor:default}.reader-task-choice .choice-marker{background:var(--blue-soft);min-width:28px;height:28px;color:var(--blue-dark);border-radius:8px;justify-content:center;align-items:center;font-weight:800;display:inline-flex}.reader-task-hint{border:2px dashed var(--border-duo);border-radius:12px;justify-content:space-between;align-items:center;gap:.6rem;margin-top:.7rem;padding:.55rem .65rem;display:flex}.reader-task-hint>div{align-items:flex-start;gap:.45rem;display:flex}.reader-task-hint>div>div{flex-direction:column;display:flex}.reader-task-hint strong{font-size:.88rem}.reader-task-hint span{color:var(--muted);font-size:.76rem}.reader-task-hint-result{border:2px solid var(--border-duo);background:var(--surface-2);border-radius:12px;margin-top:.55rem;padding:.5rem .65rem}.reader-task-hint-result span{color:var(--blue-dark);font-size:.74rem;font-weight:800}.reader-task-hint-result p{margin:.25rem 0 0;line-height:1.55}.reader-task-state,.reader-answer-reveal{border-radius:12px;align-items:flex-start;gap:.45rem;margin-top:.65rem;padding:.55rem .65rem;font-size:.84rem;line-height:1.5;display:flex}.reader-task-state.neutral{background:var(--surface-2);color:var(--muted)}.reader-task-state.saved{background:var(--blue-soft);color:var(--blue-dark)}.reader-task-state.positive{background:var(--green-soft);color:var(--green-dark)}.reader-task-state.attention{color:#7a5700;background:#fff1cc}.reader-answer-reveal{background:var(--green-soft);border:2px solid #c7e9a2;flex-direction:column}.reader-answer-reveal>div{justify-content:space-between;align-items:center;gap:.5rem;display:flex}.reader-answer-reveal p{margin:.25rem 0 0}.reader-feedback p{color:var(--muted);margin:.3rem 0 0;font-size:.84rem}.reader-feedback h2{margin:.1rem 0 0;font-size:1rem}.reader-feedback .button{margin-top:.6rem}.reader-feedback.second-round{border-color:var(--blue)}.reader-footer{color:var(--muted);border-top:2px solid var(--line-strong);justify-content:space-between;gap:1rem;padding:.7rem 1.25rem;font-size:.78rem;display:flex}.reader-continue-card{border-color:var(--green)}.reader-unit-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.6rem;display:grid}.reader-unit-card{border:2px solid var(--border-duo);background:#fff;border-radius:14px;align-items:center;gap:.7rem;padding:.7rem .8rem;display:flex;box-shadow:0 2px #0000000d}.reader-unit-card.unit-open{width:100%;font:inherit;text-align:left;cursor:pointer;transition:border-color .12s,transform 50ms,box-shadow .12s}.reader-unit-card.unit-open:hover{border-color:var(--blue);box-shadow:0 3px #1cb0f62e}.reader-unit-card.unit-open:active{transform:translateY(1px)}.reader-unit-number{background:var(--blue-soft);min-width:48px;height:32px;color:var(--blue-dark);white-space:nowrap;border:2px solid #a4d7ef;border-radius:10px;justify-content:center;align-items:center;font-size:.78rem;font-weight:800;display:inline-flex}.reader-unit-copy{flex-direction:column;flex:1;gap:.15rem;min-width:0;display:flex}.reader-unit-copy strong{text-overflow:ellipsis;white-space:nowrap;font-size:.92rem;overflow:hidden}.reader-unit-copy span{color:var(--muted);font-size:.76rem}.teacher-class-row.clickable{padding:0}.teacher-class-row-main{text-align:left;width:100%;font:inherit;cursor:pointer;background:0 0;border:none;align-items:center;gap:.8rem;padding:.75rem .85rem;display:flex}.teacher-class-row-main>div{flex-direction:column;flex:1;gap:.15rem;min-width:0;display:flex}.teacher-class-row-main>div span{color:var(--muted);font-size:.8rem}.teacher-class-row-main:hover{background:var(--surface-2)}.lesson-unit-list-item.static{cursor:default}.lesson-unit-list-item.static:hover{transform:none;box-shadow:0 2px #0000000d}.lesson-unit-list.compact{margin:.75rem 0}.class-session-create,.class-session-detail{flex-direction:column;gap:.75rem;display:flex}.class-session-publish-box{border:2px solid var(--green);background:#f4ffe9;border-radius:14px;flex-direction:column;gap:.6rem;margin:.85rem 0;padding:.85rem;display:flex}.class-session-publish-box>div:first-child{flex-direction:column;gap:.2rem;display:flex}.class-session-publish-box span{color:var(--muted);font-size:.82rem}.class-session-progress{margin-top:.85rem}.class-session-progress h3{margin:.1rem 0 0}.class-session-progress .section-heading{margin-bottom:.6rem}@media (max-width:720px){.teacher-main{padding:.5rem .75rem 2rem}.teacher-section-nav{flex-direction:column;gap:6px}.teacher-section-tab{flex-direction:row;align-items:center;gap:.5rem;padding:10px 12px}.book-split-controls{gap:.5rem}.book-split-controls select{width:100%;min-width:0}.lesson-unit-list-item{flex-wrap:wrap}.lesson-unit-list-copy{flex-basis:calc(100% - 70px)}.teacher-class-row-main{flex-wrap:wrap}.class-session-publish-box .lesson-create-actions{flex-direction:column;align-items:stretch}}@media (max-width:1080px){.reader-layout.v02{grid-template-columns:minmax(0,1fr) minmax(300px,340px)}}@media (max-width:820px){.reader-layout.v02{grid-template-columns:1fr}}.reader-side-column{flex-direction:column;gap:1rem;min-width:0;display:flex}.reader-notes-panel{flex-direction:column;gap:.6rem;padding:.85rem;display:flex}.reader-notes-heading{justify-content:space-between;align-items:flex-start;gap:.6rem;display:flex}.reader-notes-heading h2{margin:.1rem 0 0;font-size:1.05rem}.reader-notes-list{flex-direction:column;gap:.6rem;max-height:52vh;display:flex;overflow-y:auto}.reader-note{border:2px solid var(--border-duo);background:#fff;border-radius:14px;padding:.6rem .7rem}.reader-note.simplify{background:#fbfff7;border-color:#c7e9a2}.reader-note.word{background:#f6fcff;border-color:#a4d7ef}.reader-note-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;display:flex}.reader-note-kind{background:var(--blue-soft);color:var(--blue-dark);border-radius:8px;padding:.18rem .5rem;font-size:.74rem;font-weight:800;display:inline-block}.reader-note.simplify .reader-note-kind{background:var(--green-soft);color:var(--green-dark)}.reader-note-meta{color:var(--muted);font-size:.7rem;font-weight:700}.reader-note-quote{border-left:3px solid var(--border-duo);color:#4a535c;max-height:88px;margin:.45rem 0;padding-left:.55rem;font-size:.8rem;line-height:1.5;overflow-y:auto}.reader-note-result{margin:.4rem 0 0;font-size:.9rem;line-height:1.6}.reader-note-action{margin-top:.35rem;font-size:.82rem}.reader-notes-empty{text-align:center;color:var(--muted);border:2px dashed var(--border-duo);border-radius:14px;flex-direction:column;align-items:center;gap:.5rem;padding:1.2rem .5rem;font-size:.82rem;line-height:1.5;display:flex}.reader-pdf-stage{background:var(--surface-2);border:2px solid var(--border-duo);border-radius:14px;justify-content:center;min-height:320px;margin:.7rem 0 .4rem;padding:.9rem;display:flex;overflow:auto}.reader-pdf-surface{--user-unit:1;--scale-round-x:1px;--scale-round-y:1px;--total-scale-factor:calc(var(--scale-factor,1) * var(--user-unit));border-radius:6px;flex:none;position:relative;box-shadow:0 4px #00000014}.reader-pdf-surface canvas{background:#fff;border-radius:6px;max-width:none;display:block}.reader-pdf-surface.is-rendering canvas{opacity:.75}.textLayer.reader-text-layer{color-scheme:light only;text-align:initial;opacity:1;letter-spacing:normal;word-spacing:normal;-webkit-text-size-adjust:none;-moz-text-size-adjust:none;text-size-adjust:none;forced-color-adjust:none;transform-origin:0 0;caret-color:canvastext;z-index:1;--min-font-size:1;--text-scale-factor:calc(var(--total-scale-factor) * var(--min-font-size));--min-font-size-inv:calc(1 / var(--min-font-size));line-height:1;position:absolute;top:0;right:0;bottom:0;left:0;overflow:clip}.textLayer.reader-text-layer :is(span,br){color:#0000;white-space:pre;cursor:text;transform-origin:0 0;-webkit-user-select:text;user-select:text;position:absolute}.textLayer.reader-text-layer>:not(.markedContent),.textLayer.reader-text-layer .markedContent span:not(.markedContent){z-index:1;--font-height:0;font-size:calc(var(--text-scale-factor) * var(--font-height));--scale-x:1;--rotate:0deg;transform:rotate(var(--rotate)) scaleX(var(--scale-x)) scale(var(--min-font-size-inv))}.textLayer.reader-text-layer .markedContent{display:contents}.textLayer.reader-text-layer ::selection{color:#0000;background:#1cb0f659}.reader-notes-filter{gap:.5rem;display:flex}.reader-notes-filter button{border:2px solid var(--border-duo);font:inherit;color:var(--muted);cursor:pointer;background:#fff;border-radius:999px;flex:1;padding:.35rem .6rem;font-size:.8rem;font-weight:800}.reader-notes-filter button.active{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-dark)}.reader-note.merged{background:#fbfff7;border-color:#c7e9a2}.reader-note.merged.word{background:#f6fcff;border-color:#a4d7ef}.reader-note-title{cursor:pointer;border-radius:8px;flex-direction:column;flex:1;gap:.15rem;min-width:0;margin:-.1rem -.2rem;padding:.1rem .2rem;transition:background .12s;display:flex}.reader-note-title:hover{background:#1cb0f614}.reader-note-title:active{background:#1cb0f629}.reader-note-title strong{text-overflow:ellipsis;white-space:nowrap;font-size:.86rem;line-height:1.4;overflow:hidden}.reader-note-title span{color:var(--muted);font-size:.72rem;font-weight:700}.reader-note-tabs{flex-wrap:wrap;gap:.35rem;margin:.55rem 0 .4rem;display:flex}.reader-note-tab{border:2px solid var(--border-duo);font:inherit;color:var(--muted);cursor:pointer;background:#fff;border-radius:10px;padding:.28rem .6rem;font-size:.76rem;font-weight:800}.reader-note-tab.active{background:var(--green);border-color:var(--green-dark);color:#fff}.reader-note.merged.word .reader-note-tab.active{background:var(--blue);border-color:var(--blue-dark)}.reader-note-actions{flex-wrap:wrap;align-items:center;gap:.5rem;margin-top:.55rem;display:flex}.reader-note-hint{color:var(--muted);margin:.5rem 0 0;font-size:.76rem}.textLayer.reader-text-layer span.reader-highlight{background:#ffc8004d;border-radius:2px}.note-color-0{--note-rgb:28, 176, 246}.note-color-1{--note-rgb:88, 204, 2}.note-color-2{--note-rgb:255, 200, 0}.note-color-3{--note-rgb:255, 150, 0}.note-color-4{--note-rgb:206, 130, 255}.note-color-5{--note-rgb:255, 134, 168}.textLayer.reader-text-layer span.reader-highlight{background:rgba(var(--note-rgb,255, 200, 0),.3);box-shadow:inset 0 -2px rgba(var(--note-rgb,255, 200, 0),.55);border-radius:2px}.reader-note.merged{border-left:6px solid rgb(var(--note-rgb,88, 204, 2))}.reader-note-color-dot{background:rgb(var(--note-rgb,88, 204, 2));vertical-align:2px;border-radius:999px;width:10px;height:10px;margin-right:.3rem;display:inline-block}.reader-note-heading-actions{align-items:center;gap:.35rem;display:flex}.reader-note-delete{border:2px solid var(--border-duo);color:#b04a4a;cursor:pointer;background:#fff;border-radius:8px;width:26px;height:26px;font-size:14px;font-weight:800;line-height:1}.reader-note-delete:hover:not(:disabled){background:#fff2f2;border-color:#e07a7a}.reader-note-delete:disabled{opacity:.4;cursor:default}.reader-note.merged,.reader-note.merged.word,.reader-note.merged.simplify{background:rgba(var(--note-rgb,88, 204, 2),.12)}.reader-note.merged{border:2px solid rgba(var(--note-rgb,88, 204, 2),.55);border-left-width:6px;border-left-color:rgb(var(--note-rgb,88, 204, 2))}.reader-note.merged.note-flash{animation:.9s ease-in-out 2 reader-note-flash}@keyframes reader-note-flash{0%,to{box-shadow:0 0 rgba(var(--note-rgb,88, 204, 2),0)}50%{box-shadow:0 0 0 5px rgba(var(--note-rgb,88, 204, 2),.45)}}.textLayer.reader-text-layer span.reader-highlight-flash{border-radius:2px;animation:1.1s ease-in-out 2 reader-highlight-flash}@keyframes reader-highlight-flash{0%,to{filter:brightness();box-shadow:0 0 #1cb0f600}40%{filter:brightness(1.3);box-shadow:0 0 0 4px #1cb0f6e6}70%{filter:brightness(1.15);box-shadow:0 0 0 4px #1cb0f68c}}.reader-layout.v02{grid-template-columns:minmax(0,1fr) minmax(360px,460px);gap:1.25rem}.reader-pdf-stage{align-items:center;height:min(78vh,100vh - 190px);min-height:340px;overflow:hidden}.reader-notes-list{max-height:none;overflow:visible}@media (max-width:1080px){.reader-layout.v02{grid-template-columns:minmax(0,1fr) minmax(320px,360px)}}@media (max-width:820px){.reader-layout.v02{grid-template-columns:1fr}.reader-pdf-stage{height:min(62vh,480px);min-height:280px}}.reader-pdf-stage{background:0 0;border:none;height:auto;min-height:0;max-height:none;padding:0;overflow:visible}.reader-note.merged.collapsed{border:2px solid rgba(var(--note-rgb,88, 204, 2),.45);border-left-width:6px;border-left-color:rgb(var(--note-rgb,88, 204, 2));background:rgba(var(--note-rgb,88, 204, 2),.08);padding:0}.reader-note-collapsed{text-align:left;width:100%;font:inherit;cursor:pointer;background:0 0;border:none;align-items:center;gap:.55rem;min-width:0;padding:.45rem .6rem;display:flex}.reader-note-collapsed-text{text-overflow:ellipsis;white-space:nowrap;color:#2b333b;flex:1;min-width:0;font-size:.84rem;font-weight:700;overflow:hidden}.reader-note-collapsed-count{background:rgba(var(--note-rgb,88, 204, 2),.2);color:#2b333b;border-radius:999px;flex:none;justify-content:center;align-items:center;min-width:22px;height:22px;font-size:.72rem;font-weight:800;display:inline-flex}.reader-note-chevron{color:#9fb2c0;flex:none;width:16px;height:16px;transition:transform .15s}.reader-note-collapsed:hover .reader-note-chevron{transform:translate(2px)}.reader-note-collapse{font-size:.76rem}.textLayer.reader-text-layer span.reader-highlight{z-index:2}.reader-layout.v02{grid-template-columns:minmax(0,1.3fr) minmax(320px,420px) minmax(300px,380px)}.reader-task-column{flex-direction:column;gap:1rem;min-width:0;display:flex}@media (max-width:1180px){.reader-layout.v02{grid-template-columns:minmax(0,1fr) minmax(300px,360px)}.reader-task-column{grid-column:1/-1;grid-template-columns:1fr 1fr;gap:1rem;display:grid}}@media (max-width:820px){.reader-layout.v02{grid-template-columns:1fr}.reader-task-column{flex-direction:column;grid-column:auto;display:flex}}.lesson-unit-checkpoint-heading{justify-content:space-between;align-items:center;gap:.5rem;display:flex}.lesson-unit-checkpoint-heading .panel-kicker{margin:0}.lesson-unit-remove-task{font-size:.8rem}.lesson-unit-generate-row{flex-wrap:wrap;justify-content:flex-start}.reader-layout.v02>*,.reader-book-heading,.reader-notes-heading{min-width:0}.reader-book-heading h1{overflow-wrap:anywhere;word-break:break-word}.reader-unit-chips{max-width:100%}.reader-book-toolbar{min-width:0}.reader-book-toolbar>span{white-space:normal;min-width:0}.reader-task-pager{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.6rem;padding:.4rem 0;display:flex}.reader-task-pager>span{color:var(--muted);font-size:.82rem;font-weight:800}.reader-layout.v02{grid-template-columns:minmax(0,620px) minmax(320px,380px) minmax(300px,340px);align-items:stretch}.reader-book-panel,.reader-notes-panel,.reader-task-column{height:100%}.reader-notes-panel{flex-direction:column;min-height:0;display:flex}.reader-notes-list{flex:1;min-height:0;overflow-y:auto}@media (max-width:1180px){.reader-layout.v02{grid-template-columns:minmax(0,1fr) minmax(320px,400px)}.reader-notes-list{overflow:visible}}@media (max-width:820px){.reader-layout.v02{grid-template-columns:1fr}.reader-book-panel,.reader-notes-panel,.reader-task-column{height:auto}}.reader-book-panel.panel{box-shadow:none;background:0 0;border:none;padding:0}.reader-book-heading{padding:0 0 .5rem}.reader-book-toolbar{margin-top:.5rem}.reader-pdf-surface{box-shadow:0 1px 3px #0000001f}.reader-pdf-stage{width:100%;max-width:100%}.textLayer.reader-text-layer span.reader-space{-webkit-user-select:none;user-select:none;pointer-events:none}.textLayer.reader-text-layer span.reader-live-selection{color:#0000;background:#1cb0f659;border-radius:2px}@media (pointer:coarse){.textLayer.reader-text-layer span{-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}.textLayer.reader-text-layer span.reader-highlight{-webkit-user-select:none;user-select: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}
