body,html{overflow-x:clip}body{font-size:15px;background:var(--color-background);color:var(--color-text-primary)}h1,h2,h3,h4{font-family:var(--font-display);font-style:normal;line-height:1.2;letter-spacing:-.035em;overflow-wrap:anywhere}h1{font-size:var(--text-display)}h1,h2{font-weight:700}h2{font-size:1.5rem}h3{font-size:1.1rem;font-weight:700}p{line-height:1.7}button,input,select,textarea{font:inherit}button{cursor:pointer}svg{flex-shrink:0}.page-shell{width:min(1184px,calc(100% - 64px))}.button{border-radius:7px;font-size:14px;font-weight:600;min-height:46px;padding:12px 20px;transition:opacity var(--dur-fast) var(--ease-out)}.button:hover{transform:none!important}.button-secondary:hover{color:var(--color-text-primary);background:var(--color-surface-elevated)!important}.button-small{min-height:40px;padding:10px 16px}.icon-button{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--color-border);border-radius:7px;background:var(--color-surface);color:var(--color-text-secondary);padding:0}.icon-button:hover{background:var(--color-surface-elevated)}.site-header{position:sticky;top:0;z-index:50;display:flex;justify-content:space-between;gap:32px;padding:12px max(32px,calc((100vw - 1184px)/2));min-height:86px;background:var(--color-surface);border-bottom:1px solid var(--color-border)}.brand{display:flex;flex-shrink:0;width:145px}.brand-logo{width:145px!important;height:62px!important;object-fit:contain}[data-theme=dark] .auth-brand img,[data-theme=dark] .brand-logo,[data-theme=dark] .footer-brand img{filter:brightness(0) invert(1)}.desktop-nav{display:flex;align-items:center;gap:28px;margin-left:auto}.desktop-nav a{font-size:13px;font-weight:500;color:var(--color-text-secondary);white-space:nowrap;padding:12px 0}.desktop-nav a[aria-current=page]{color:var(--color-accent)}.header-actions{display:flex;align-items:center;gap:12px}.account-name{font-size:13px;max-width:100px;overflow:hidden;text-overflow:ellipsis}.menu-toggle{display:none}.mobile-nav{top:100%;background:var(--color-surface);border-bottom:1px solid var(--color-border)}.catalog-intro{padding:64px 0 56px;display:flex;align-items:center;justify-content:space-between;gap:48px}.intro-kicker{color:var(--color-accent);font-size:13px;font-weight:600;margin-bottom:20px}.catalog-intro h1{font-size:clamp(2.3rem,4vw,3.75rem);line-height:1.17}.catalog-intro h1 span,.catalog-intro>div>p:last-child{color:var(--color-text-secondary)}.catalog-intro>div>p:last-child{margin-top:24px;font-size:16px}.student-shortcut{display:flex;align-items:center;gap:16px;padding:24px;border:1px solid var(--color-border);border-radius:10px;max-width:355px;background:var(--color-surface)}.student-shortcut strong{display:block;font-size:14px;margin-bottom:6px}.student-shortcut small{display:block;font-size:12px;line-height:1.65;color:var(--color-text-secondary)}.student-shortcut>svg{color:var(--color-text-muted)}.shortcut-icon{display:flex;color:var(--color-accent)}.catalog-title{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:24px 0;border-top:1px solid var(--color-border)}.catalog-title h2{font-size:22px}.catalog-title>span{font-size:13px;color:var(--color-text-muted)}.catalog-toolbar{display:flex;gap:16px}.catalog-search{margin:0;display:flex;flex:1;align-items:center;gap:12px;border:1px solid var(--color-border);border-radius:7px;background:var(--color-surface);padding:0 16px;max-width:none;color:var(--color-text-muted)}.catalog-search input{min-width:0;flex:1;width:100%;border:0;padding:16px 0;outline-offset:0;background:transparent;color:var(--color-text-primary);font-size:14px}.catalog-filter{display:flex;align-items:center;gap:12px;padding:0 16px;border:1px solid var(--color-border);background:var(--color-surface);border-radius:7px}.catalog-filter select{padding:15px 4px;color:var(--color-text-secondary);font-size:13px}.catalog-caption{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--color-text-muted);margin:20px 0}.catalog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.catalog-card{display:grid;grid-template-columns:190px minmax(0,1fr);grid-column:span 2;border:1px solid var(--color-border);border-radius:12px;background:var(--color-surface);overflow:hidden}.course-art{position:relative;flex-direction:column;min-height:275px;padding:28px;background:var(--color-art);color:var(--color-art-text);overflow:hidden}.course-art,.excel-emblem{display:flex;justify-content:center}.excel-emblem{align-items:center;background:var(--color-art-emblem);width:72px;height:80px;border-radius:10px;margin-bottom:20px;z-index:1}.course-art>span{font-size:11px;color:var(--color-art-muted);z-index:1}.course-art>strong{font-family:var(--font-display);font-size:18px;margin-top:8px;font-weight:600;line-height:1.4;z-index:1}.art-grid{position:absolute;inset:0;background-image:linear-gradient(var(--color-art-line) 1px,transparent 1px),linear-gradient(90deg,var(--color-art-line) 1px,transparent 1px);background-size:36px 36px;opacity:.5}.catalog-card-body{padding:30px 32px;display:flex;flex-direction:column;align-items:flex-start}.status-chip{display:inline-flex;width:fit-content;background:var(--color-accent-soft);color:var(--color-accent);font-size:11px;font-weight:600;border:0;border-radius:4px;padding:4px 9px}.catalog-card-body h2{margin:12px 0 10px;font-size:26px}.catalog-card-body>p{max-width:650px;color:var(--color-text-secondary);font-size:14px}.card-meta{gap:8px;font-size:12px;color:var(--color-text-muted);margin:20px 0}.card-bottom,.card-meta{display:flex;align-items:center}.card-bottom{justify-content:space-between;width:100%;gap:20px;padding-top:20px;margin-top:auto;border-top:1px solid var(--color-border)}.card-bottom small,.card-bottom strong{display:block}.card-bottom small{font-size:11px;color:var(--color-text-muted);margin-bottom:3px}.card-bottom strong{font-size:20px}.learning-promise{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:48px;padding:48px 0 64px}.learning-promise svg{color:var(--color-accent);margin-bottom:16px}.learning-promise h3{font-size:15px;margin-bottom:10px}.learning-promise p{color:var(--color-text-secondary);font-size:13px}.site-footer{display:flex;flex-direction:row;justify-content:space-between;padding:32px max(32px,calc((100vw - 1184px)/2));gap:32px;border-top:1px solid var(--color-border);background:var(--color-surface)}.footer-brand img{width:125px;height:61px;object-fit:contain}.footer-statement{display:none}.footer-meta{display:flex;flex-direction:column;align-items:flex-end;gap:12px;color:var(--color-text-muted);font-size:11px}.footer-meta>span:first-child{display:none}.footer-meta nav{display:flex;gap:24px;font-size:12px}.auth-page{min-height:100svh;display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}.auth-story{background:var(--color-art);color:var(--color-art-text);display:flex;flex-direction:column;padding:40px clamp(32px,5vw,80px)}.auth-brand img{width:180px;height:88px;object-fit:contain;filter:brightness(0) invert(1)}.auth-story-copy{margin:auto 0;padding:64px 0;max-width:410px}.auth-symbol{display:flex;width:60px;height:60px;align-items:center;justify-content:center;border:1px solid var(--color-art-line);border-radius:12px;margin-bottom:36px}.auth-story h2{font-size:clamp(1.8rem,3vw,2.8rem);line-height:1.22}.auth-story-copy>p{color:var(--color-art-muted);margin:24px 0 36px;font-size:15px}.auth-story ul{list-style:none;padding:0;margin:0;display:grid;gap:18px;font-size:13px}.auth-story li{display:flex;gap:12px;align-items:center}.auth-story>small{color:var(--color-art-muted);font-size:11px}.auth-main{padding:32px 48px;display:flex;flex-direction:column;background:var(--color-surface)}.auth-top{justify-content:space-between}.auth-top,.auth-top>a{display:flex;align-items:center}.auth-top>a{gap:8px;font-size:12px;color:var(--color-text-secondary)}.auth-card{width:min(100%,420px);margin:auto;padding:48px 0}.auth-icon{width:48px;height:48px;border-radius:10px;background:var(--color-accent-soft);color:var(--color-accent);display:flex;align-items:center;justify-content:center;margin-bottom:24px}.auth-card h1{font-size:30px;line-height:1.25}.auth-card>p{color:var(--color-text-secondary);margin:16px 0 28px;font-size:14px}.auth-context{background:var(--color-accent-soft);border-radius:6px;font-size:12px;padding:12px 16px;margin-bottom:24px;color:var(--color-accent)}.auth-form,.editor-form{display:grid;gap:20px}label{color:var(--color-text-primary)}.auth-form label,.editor-form label,.exercise-panel label,.lesson-tools label{display:grid;gap:8px;font-size:13px;font-weight:500}input:not([type=checkbox]):not([type=radio]):not([type=file]),select,textarea{color:var(--color-text-primary);background:var(--color-surface);border:1px solid var(--color-border);border-radius:7px;min-height:46px;padding:12px 14px;width:100%;min-width:0}input::placeholder,textarea::placeholder{color:var(--color-text-muted);opacity:.85}.catalog-search input{border:0!important;background:transparent!important;padding-left:0!important}.catalog-filter select{border:0;background:transparent}.label-row{display:flex;justify-content:space-between;gap:12px}.label-row a{font-size:11px;color:var(--color-accent)}.password-field{display:flex;align-items:center;position:relative}.password-field input{padding-right:48px!important}.password-field button{position:absolute;right:4px;display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:0;background:transparent;color:var(--color-text-muted)}label.check-label{display:flex;align-items:flex-start;gap:10px;font-size:12px;line-height:1.6;font-weight:400}.check-label input{width:16px;height:16px;margin-top:3px;flex-shrink:0;accent-color:var(--color-accent)}.check-label a{color:var(--color-accent);text-decoration:underline;text-underline-offset:3px}.auth-security{display:flex;justify-content:center;align-items:center;gap:7px;font-size:10px;color:var(--color-text-muted);text-align:center}.auth-card .auth-switch{text-align:center;font-size:13px;border-top:1px solid var(--color-border);padding-top:24px;margin:24px 0 0}.auth-help a,.auth-switch a{color:var(--color-accent);font-weight:600}.auth-help{text-align:center;color:var(--color-text-muted);font-size:11px}.recovery-support{display:grid;gap:24px;font-size:13px}.form-error,.form-success{padding:12px 14px;border:1px solid;border-radius:7px;font-size:13px;line-height:1.6}.form-error{color:var(--color-danger)}.form-success{color:var(--color-success)}.back-link{display:flex;width:fit-content;align-items:center;gap:8px;color:var(--color-text-secondary);font-size:12px;padding:28px 0;white-space:nowrap}.detail-hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:72px;padding:20px 0 64px}.detail-hero h1{margin:20px 0 24px}.detail-hero>div>p{color:var(--color-text-secondary);max-width:620px}.detail-facts{display:flex;gap:24px;margin-top:28px;flex-wrap:wrap}.detail-facts>span{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--color-text-secondary)}.order-summary,.purchase-panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:30px;align-self:start;box-shadow:0 8px 30px var(--color-shadow)}.purchase-panel>span{font-size:12px;color:var(--color-text-muted)}.purchase-panel>strong{display:block;font-family:var(--font-display);font-size:36px;letter-spacing:-.04em;margin:10px 0 20px}.purchase-panel>p{font-size:13px;color:var(--color-text-secondary);margin-bottom:24px}.purchase-panel>small{display:block;color:var(--color-text-muted);font-size:11px;margin-top:16px;line-height:1.7}.detail-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:72px;padding:48px 0 80px;border-top:1px solid var(--color-border)}.detail-body>div>p{margin:20px 0;font-size:14px;color:var(--color-text-secondary)}.check-list{list-style:none;padding:0;margin-top:24px;display:grid;gap:18px;font-size:13px}.check-list li{display:flex;gap:10px;align-items:center}.check-list svg{color:var(--color-accent)}.content-notice{padding:32px;margin-top:24px;border:1px solid var(--color-border);border-radius:10px;background:var(--color-surface)}.content-notice svg{color:var(--color-text-muted);margin-bottom:20px}.content-notice p{color:var(--color-text-secondary);margin-top:12px}.curriculum details{margin-top:20px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px}.curriculum summary{display:flex;justify-content:space-between;align-items:center;padding:20px;cursor:pointer}.curriculum ul{padding:0 20px 20px;list-style:none}.curriculum li{display:flex;align-items:center;gap:10px;padding:12px 0;font-size:13px}.curriculum li small{margin-left:auto;white-space:nowrap}.checkout-page{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:72px;padding-top:16px;padding-bottom:80px}.checkout-page h1{font-size:36px;margin-bottom:20px}.checkout-page>section>p{color:var(--color-text-secondary)}.checkout-page .order-summary{margin-top:88px}.sandbox-notice{display:flex;gap:14px;padding:20px;border-radius:8px;background:var(--color-accent-soft);color:var(--color-accent);margin:28px 0}.sandbox-notice p{font-size:12px;margin-top:5px}.sandbox-notice strong{font-size:13px}.checkout-form{display:grid;gap:24px}.checkout-form fieldset{border:0;padding:0;display:grid;gap:12px}.checkout-form legend{font-size:14px;font-weight:600;margin-bottom:16px}.payment-option{display:flex;gap:16px;align-items:center;padding:20px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;cursor:pointer}.payment-option:has(input:checked){border-color:var(--color-accent);background:var(--color-accent-soft)}.payment-option input{accent-color:var(--color-accent)}.payment-option small,.payment-option strong{display:block}.payment-option strong{font-size:14px}.payment-option small{font-size:11px;color:var(--color-text-muted);margin-top:4px}.order-summary>span{font-size:12px;color:var(--color-text-muted)}.order-summary h2{margin:14px 0}.order-summary p{color:var(--color-text-secondary);font-size:13px}.order-summary dl{margin-top:28px}.order-summary dl>div{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--color-border);font-size:12px}.order-summary dd{text-align:right;margin:0;overflow-wrap:anywhere}.order-summary>small{font-size:11px;color:var(--color-text-muted);display:block;margin-top:24px}.dashboard,.teacher-workspace{min-height:calc(100vh - 235px);padding-top:48px;padding-bottom:72px}.dashboard-heading{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:40px}.dashboard-heading h1{font-size:36px}.dashboard-heading .intro-kicker{margin-bottom:12px}.dashboard-heading p:last-child{color:var(--color-text-secondary);margin-top:16px;font-size:14px}.dashboard-section-title{display:flex;align-items:center;justify-content:space-between;margin:32px 0 24px}.dashboard-section-title>span{font-size:12px;color:var(--color-text-muted)}.empty-state{padding:64px 28px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:16px}.empty-state>svg{color:var(--color-accent)}.empty-state h2{font-size:24px}.empty-state p{max-width:520px;font-size:14px;color:var(--color-text-secondary)}.empty-state .button{margin-top:12px}.my-courses{display:grid;gap:24px}.my-course{gap:28px;padding:28px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px}.my-course,.my-course-icon{display:flex;align-items:center}.my-course-icon{width:90px;height:110px;background:var(--color-accent-soft);color:var(--color-accent);justify-content:center;border-radius:8px;flex-shrink:0}.my-course-main{flex:1}.my-course h2{margin:12px 0}.my-course p,.my-course small{color:var(--color-text-muted);font-size:12px}.progress-track{background:var(--color-surface-strong);height:5px;margin:18px 0 12px;border-radius:5px;overflow:hidden}.progress-track>span{display:block;height:100%;background:var(--color-accent)}.teacher-shortcut{display:flex;gap:12px;align-items:center;margin-top:32px;font-size:13px;color:var(--color-accent)}.classroom-empty{margin-top:32px}.status-banner{display:flex;align-items:center;gap:12px;border:1px solid var(--color-border);background:var(--color-accent-soft);color:var(--color-success);padding:16px 20px;margin-bottom:24px;border-radius:8px;font-size:13px}.teacher-workbench{display:grid;grid-template-columns:205px minmax(0,1fr);gap:40px}.teacher-sidebar nav{display:grid;gap:5px}.teacher-sidebar nav a{display:flex;gap:12px;align-items:center;font-size:13px;padding:14px;border-radius:7px;color:var(--color-text-secondary);white-space:nowrap}.teacher-sidebar nav a.active{background:var(--color-accent-soft);color:var(--color-accent);font-weight:600}.teacher-mode{margin-top:36px;padding:20px 14px;border-top:1px solid var(--color-border);color:var(--color-text-muted);font-size:11px}.teacher-mode p{margin-top:8px}.teacher-content{min-width:0}.teacher-content>h2{margin-bottom:12px}.muted{color:var(--color-text-muted);font-size:13px}.teacher-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:24px 0}.teacher-summary article{display:flex;flex-direction:column;gap:12px;align-items:flex-start;padding:24px;border:1px solid var(--color-border);background:var(--color-surface);border-radius:8px}.teacher-summary article svg{color:var(--color-accent)}.teacher-summary article strong{font-size:30px;font-family:var(--font-display)}.teacher-summary article span{font-size:12px;color:var(--color-text-secondary)}.editor-panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;padding:28px;margin:24px 0}.editor-panel h3{margin-bottom:24px}.editor-panel summary{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;cursor:pointer}.editor-panel[open]>summary{margin-bottom:24px}.setup-step{gap:16px;padding:24px 0;border-top:1px solid var(--color-border)}.setup-step,.setup-step>span{display:flex;align-items:center}.setup-step>span{justify-content:center;width:32px;height:32px;flex-shrink:0;border-radius:50%;background:var(--color-surface-elevated);color:var(--color-text-muted);font-size:12px}.setup-step strong{font-size:13px}.setup-step p{color:var(--color-text-muted);font-size:12px;margin-top:6px}.setup-step>a{margin-left:auto;flex-shrink:0;color:var(--color-accent);font-size:12px;white-space:nowrap}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.editor-form small{color:var(--color-text-muted);font-size:11px}.editor-form .button{justify-self:start}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.panel-heading p{margin-top:10px}.module-inline{display:flex;align-items:flex-end;gap:12px}.module-inline label{display:grid;gap:8px;font-size:11px;flex:1}.module-inline .position-field{max-width:65px}.lesson-editor-row{display:flex;align-items:center;gap:14px;padding:20px 0;border-top:1px solid var(--color-border);margin-top:18px;font-size:13px}.lesson-editor-row>div{flex:1}.lesson-editor-row small{display:block;color:var(--color-text-muted);font-size:11px;margin-top:6px}.lesson-editor-row>a{color:var(--color-accent)}.field-label{display:block;font-size:13px;margin-bottom:10px}.upload-field{border:1px dashed var(--color-border-strong);padding:20px;border-radius:8px;display:grid;gap:12px}.upload-button{display:flex!important;align-items:center;gap:12px!important;color:var(--color-accent);cursor:pointer}.upload-button input{max-width:100%;font-size:11px}.upload-field progress{width:100%;accent-color:var(--color-accent)}.editor-form details>label{margin-top:16px}.editor-form textarea{resize:vertical;min-height:100px}.table-wrap{overflow-x:auto;margin-top:24px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-surface)}.table-wrap table{border-collapse:collapse;width:100%;font-size:13px}.table-wrap td,.table-wrap th{text-align:left;padding:20px;border-bottom:1px solid var(--color-border)}.table-wrap th{font-weight:500;color:var(--color-text-muted);font-size:11px;background:var(--color-surface-elevated)}.table-wrap td small{display:block;margin-top:6px;color:var(--color-text-muted)}.question-panel>div{display:flex;justify-content:space-between;gap:16px}.question-panel>small{display:block;color:var(--color-text-muted);margin:10px 0}.question-panel>p{margin:20px 0;white-space:pre-wrap}.classroom{background:var(--color-background);min-height:100svh}.classroom-header{display:flex;align-items:center;gap:20px;min-height:80px;padding:14px 28px;background:var(--color-surface);border-bottom:1px solid var(--color-border)}.classroom-header>div{flex:1}.classroom-header>div>span{display:block;font-size:11px;color:var(--color-text-muted);margin-bottom:6px}.classroom-header strong{font-size:14px}.classroom-layout{display:grid;grid-template-columns:280px minmax(0,1fr);max-width:1600px;margin:auto}.lesson-nav{background:var(--color-surface);border-right:1px solid var(--color-border);padding:28px 20px}.lesson-nav h2{font-size:18px}.lesson-nav>p{color:var(--color-text-muted);font-size:11px;margin:12px 0 24px}.lesson-nav details{margin-top:16px}.lesson-nav summary{cursor:pointer;font-weight:600;font-size:13px;padding:12px 0}.lesson-nav nav a{display:flex;align-items:center;gap:12px;border:0;border-radius:6px;padding:14px 12px;font-size:12px;margin:4px 0}.lesson-nav nav a span{color:inherit;font-size:12px}.lesson-nav nav a small{display:block;color:var(--color-text-muted);margin-top:6px}.lesson-nav a.active{color:var(--color-accent);background:var(--color-accent-soft)}.lesson-content{min-width:0;padding:32px}.learning-player{border-radius:10px;overflow:hidden;background:var(--color-art);position:relative;aspect-ratio:16/9}.learning-player video{width:100%;height:100%}.lesson-copy{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:28px 0}.lesson-copy h1{font-size:26px}.lesson-copy p{font-size:14px;color:var(--color-text-secondary);margin-top:16px}.lesson-next{display:flex;justify-content:space-between;gap:16px;padding-bottom:28px;border-bottom:1px solid var(--color-border)}.lesson-tools{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:32px}.lesson-tools>section{border:1px solid var(--color-border);border-radius:10px;padding:24px;background:var(--color-surface)}.tool-heading{display:flex;gap:12px;margin-bottom:24px}.tool-heading svg{color:var(--color-accent)}.tool-heading h2{font-size:18px}.tool-heading p{color:var(--color-text-muted);font-size:11px;margin-top:8px}.lesson-tools form{display:grid;gap:16px}.lesson-tools textarea{min-height:110px}.saved-list{padding:0;list-style:none;display:grid;gap:12px;margin:24px 0 0}.saved-list li{border-top:1px solid var(--color-border);padding-top:16px;font-size:13px;white-space:pre-wrap}.saved-list p{margin-top:12px}.teacher-reply{padding:16px;background:var(--color-accent-soft);border-radius:8px;margin-top:16px}.text-link{display:inline-block;margin-top:16px;font-size:12px}.exercise-panel{margin-top:32px;padding:28px;border:1px solid var(--color-border);background:var(--color-surface);border-radius:10px}.exercise-panel>svg{color:var(--color-accent);margin-bottom:16px}.exercise-panel>p{margin:16px 0 24px;white-space:pre-wrap}.exercise-panel form{display:grid;gap:16px}.exercise-panel .button{justify-self:start}.player-feedback{padding:12px;background:var(--color-surface);color:var(--color-text-secondary);font-size:12px}.support-page{padding:64px 0 80px;min-height:65vh}.support-page>p:last-of-type{color:var(--color-text-secondary);margin-top:20px}.support-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;margin-top:24px}.support-grid h2{margin:24px 0 16px}.support-grid p{font-size:14px;color:var(--color-text-secondary);margin-bottom:24px}.support-grid svg{color:var(--color-accent)}.support-grid small{display:block;font-size:12px;color:var(--color-text-muted);margin-top:16px;overflow-wrap:anywhere}.legal-page{max-width:800px;padding:64px 0 80px;min-height:70vh}.legal-page h1{font-size:36px}.legal-page h2{margin-top:32px}.legal-page p{margin-top:20px;color:var(--color-text-secondary)}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}@media(min-width:1500px){.auth-main{padding-inline:80px}}@media(max-width:1100px){.site-header{gap:20px}.desktop-nav{gap:18px}.desktop-nav a{font-size:12px}.account-name{display:none}.student-shortcut{max-width:300px;padding:20px}.catalog-intro{gap:24px}.checkout-page,.detail-body,.detail-hero{gap:36px}.teacher-workbench{grid-template-columns:180px minmax(0,1fr);gap:24px}.setup-step{flex-wrap:wrap}.setup-step>a{margin-left:48px}.classroom-layout{grid-template-columns:235px minmax(0,1fr)}.lesson-content{padding:24px}.lesson-tools{grid-template-columns:minmax(0,1fr)}}@media(max-width:900px){.desktop-nav{display:none}.menu-toggle{display:inline-flex}.site-header{min-height:76px;padding:8px 24px}.brand-logo{height:58px!important}.catalog-intro{padding-top:44px}.student-shortcut{display:none}.auth-page{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr)}.auth-story{padding:32px}.auth-main{padding:24px 32px}.auth-story h2{font-size:28px}.teacher-workbench{grid-template-columns:minmax(0,1fr)}.teacher-sidebar nav{display:flex;flex-wrap:wrap;gap:6px}.teacher-sidebar nav a{font-size:12px;padding:12px}.teacher-mode{display:none}.teacher-sidebar{border-bottom:1px solid var(--color-border);padding-bottom:16px}.dashboard-heading h1{font-size:30px}.lesson-copy{flex-direction:column}}@media(max-width:768px){.page-shell{width:calc(100% - 40px)}.catalog-intro{padding:36px 0}.catalog-intro h1{font-size:42px}.catalog-intro>div>p:last-child{font-size:14px}.catalog-title{align-items:flex-start;flex-direction:column;gap:8px}.catalog-title>span{display:none}.catalog-grid{grid-template-columns:minmax(0,1fr)}.catalog-card{grid-column:auto;grid-template-columns:170px minmax(0,1fr)}.catalog-card-body{padding:24px}.card-bottom{align-items:flex-start;flex-direction:column;gap:16px}.learning-promise{gap:24px;padding:36px 0 48px}.learning-promise h3{font-size:13px}.learning-promise p{font-size:12px}.site-footer{padding:28px 24px}.auth-page{grid-template-columns:minmax(0,1fr)}.auth-story{display:none}.auth-main{min-height:100svh;padding:24px}.auth-card{padding:48px 0}.auth-card h1{font-size:28px}.auth-card{max-width:440px}.checkout-page,.detail-body,.detail-hero{grid-template-columns:minmax(0,1fr);gap:32px}.detail-hero{padding-bottom:36px}.detail-body{padding-top:36px}.purchase-panel>strong{font-size:30px}.checkout-page .order-summary{margin-top:0}.checkout-page h1{font-size:30px}.dashboard-heading{align-items:flex-start;flex-direction:column;gap:24px}.my-course{flex-wrap:wrap}.my-course-icon{width:64px;height:80px}.my-course-main{min-width:calc(100% - 130px)}.my-course>.button{width:100%}.teacher-summary article{padding:20px}.editor-panel{padding:24px}.classroom-layout{grid-template-columns:minmax(0,1fr)}.lesson-nav{border:0;border-bottom:1px solid var(--color-border);padding:20px}.lesson-nav>h2{font-size:16px}.lesson-nav>p{margin-bottom:12px}.lesson-nav details{margin:0}.lesson-content{padding:20px}.classroom-header{padding:12px 20px;gap:12px}.classroom-header strong{font-size:12px}.classroom-header .icon-button{width:36px;height:36px}.support-grid{grid-template-columns:minmax(0,1fr);gap:0}.support-page{padding-top:40px}}@media(max-width:540px){.page-shell{width:calc(100% - 32px)}.site-header{padding:8px 16px;gap:12px}.brand{width:115px}.brand-logo{width:115px!important;height:54px!important}.header-actions{gap:8px}.header-actions .icon-button{width:36px;height:36px}.login-link{padding:10px 12px;font-size:12px;min-height:36px}.login-link svg{display:none}.desktop-only{display:none!important}.catalog-intro h1{font-size:clamp(31px,8.5vw,42px)}.catalog-intro .intro-kicker{font-size:12px;margin-bottom:16px}.catalog-toolbar{flex-direction:column;gap:10px}.catalog-filter{align-self:flex-start;padding:0 12px}.catalog-filter select{padding:10px 4px;min-height:40px}.catalog-caption{font-size:11px}.catalog-caption>span:last-child{display:none}.catalog-card{grid-template-columns:minmax(0,1fr)}.course-art{min-height:165px;padding:24px;display:grid;grid-template-columns:80px minmax(0,1fr);column-gap:24px;align-content:center}.excel-emblem{grid-row:span 2;margin:0;width:72px;height:82px}.course-art>strong{font-size:20px;margin-top:8px}.course-art>span{align-self:end}.catalog-card-body{padding:24px}.catalog-card-body h2{font-size:25px}.card-bottom{flex-direction:row;align-items:center;gap:10px}.card-bottom .button{font-size:11px;padding:12px}.card-bottom .button svg{width:14px}.card-bottom strong{font-size:19px}.learning-promise{grid-template-columns:minmax(0,1fr);gap:28px}.learning-promise>div{display:grid;grid-template-columns:28px minmax(0,1fr);column-gap:16px}.learning-promise svg{grid-row:span 2;margin:0}.learning-promise h3{font-size:14px;margin-bottom:8px}.learning-promise p{font-size:13px}.site-footer{flex-direction:column;gap:20px;padding:24px 16px}.footer-meta,.site-footer{align-items:flex-start}.footer-meta nav{gap:24px}.auth-main{padding:20px}.auth-card h1{font-size:27px}.auth-security{font-size:9px}.auth-top>a{font-size:11px}.auth-help{font-size:10px}.auth-card{padding:40px 0}.auth-card>p{font-size:13px}.dashboard,.teacher-workspace{padding-top:32px}.dashboard-heading h1{font-size:29px}.dashboard-heading>div>p:last-child{font-size:13px}.dashboard-section-title h2{font-size:20px}.my-course{padding:22px;gap:20px}.my-course-icon{display:none}.my-course-main{min-width:0}.my-course h2{font-size:24px}.empty-state{padding:44px 20px}.empty-state h2{font-size:22px}.empty-state .button{font-size:12px;padding:12px}.teacher-summary{gap:8px}.teacher-summary article{padding:16px 12px;gap:10px}.teacher-summary article strong{font-size:25px}.teacher-summary article span{font-size:10px}.teacher-sidebar nav a{font-size:11px;padding:10px;gap:8px}.teacher-sidebar nav a svg{width:16px}.editor-panel{padding:20px}.editor-form{gap:18px}.form-grid{grid-template-columns:minmax(0,1fr);gap:16px}.module-inline{flex-wrap:wrap}.module-inline .button{width:100%}.panel-heading{flex-direction:column}.panel-heading,.setup-step{align-items:flex-start}.setup-step>div{flex:1;min-width:0}.upload-field{padding:14px}.upload-button{flex-wrap:wrap}.upload-button input{width:100%}.setup-step>a{margin-left:48px}.table-wrap td,.table-wrap th{padding:12px;font-size:11px}.table-wrap td small{max-width:145px;overflow-wrap:anywhere;font-size:10px}.detail-hero h1{font-size:34px}.detail-hero>div>p{font-size:14px}.detail-facts{gap:16px}.detail-body{gap:32px}.detail-body h2{font-size:24px}.order-summary,.purchase-panel{padding:24px}.checkout-page{padding-top:0}.checkout-page h1{font-size:30px}.sandbox-notice{padding:16px}.payment-option{padding:16px;gap:12px}.checkout-form>.button{font-size:12px;padding:12px}.checkout-page>section>p{font-size:14px}.lesson-content{padding:16px}.lesson-copy h1{font-size:24px}.lesson-tools>section{padding:20px}.lesson-next .button{font-size:12px;padding:12px}.classroom-header>div{min-width:0}.classroom-header strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.support-page h1{font-size:32px}.support-page>p{font-size:14px}}@media(prefers-reduced-motion:reduce){*,:after,:before{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.site-footer{width:100%;margin-inline:0}.footer-brand{display:block}.footer-meta{border:0;padding:0}.status-chip{font-family:var(--font-body)}.icon-button:active{background:var(--color-surface-strong)}.icon-button:disabled,input:disabled,select:disabled,textarea:disabled{opacity:.55;cursor:not-allowed}@media(max-width:900px){.mobile-nav{display:grid;position:absolute;top:100%;right:16px;width:min(300px,calc(100vw - 32px));min-width:0;padding:10px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-surface)}.mobile-nav a,.mobile-nav button{padding:12px;min-height:44px;text-align:left;background:transparent;border:0;color:var(--color-text-primary);font-size:13px;white-space:nowrap}}.lesson-nav{display:block;overflow-y:auto}@media(max-width:959px){.lesson-nav{position:static;height:auto}.classroom-layout{grid-template-columns:minmax(0,1fr)}}.learning-page{padding-top:28px;padding-bottom:80px;min-height:70vh}.learning-nav{display:flex;flex-wrap:wrap;gap:6px;border-bottom:1px solid var(--color-border);padding-bottom:14px;margin-bottom:38px}.learning-nav a{padding:10px 14px;border-radius:6px;color:var(--color-text-secondary);font-size:14px;font-weight:600}.learning-nav a:hover,.learning-nav a[aria-current]{background:var(--color-accent-soft);color:var(--color-accent)}.learning-heading{margin-bottom:32px;max-width:800px}.learning-heading h1{font-size:clamp(1.85rem,3.5vw,3rem);margin:8px 0 12px}.learning-heading>p:last-child{color:var(--color-text-secondary);font-size:17px}.activity-card,.activity-start,.attempt-result,.learning-panel,.question-card{border:1px solid var(--color-border);background:var(--color-surface);border-radius:12px;padding:28px}.learning-panel{margin-bottom:18px}.learning-panel h2{margin:8px 0 20px}.learning-panel small{color:var(--color-text-secondary);line-height:1.6;display:block}.filter-form{display:flex;align-items:flex-end;gap:12px;margin-bottom:28px;flex-wrap:wrap}.filter-form label{display:grid;gap:8px;min-width:240px;max-width:100%;font-size:13px;font-weight:600}.learning-page input,.learning-page select,.learning-page textarea{max-width:100%;min-width:0;background:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border-strong);border-radius:6px;padding:12px}.learning-page select{min-height:46px}.learning-page input:focus,.learning-page textarea:focus{outline:2px solid var(--color-focus);outline-offset:2px}.activity-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:26px 0}.activity-card{display:flex;flex-direction:column;gap:12px}.activity-card h2{font-size:1.3rem;line-height:1.4}.activity-card p{color:var(--color-text-secondary);white-space:pre-line}.activity-card>.button{align-self:flex-start;margin-top:auto}.card-eyebrow{justify-content:space-between;color:var(--color-accent);text-transform:uppercase;letter-spacing:.05em;font-weight:700}.activity-facts,.card-eyebrow{display:flex;gap:12px;font-size:12px}.activity-facts{padding:14px 0;border-top:1px solid var(--color-border)}.activity-context,.activity-facts{flex-wrap:wrap;color:var(--color-text-secondary)}.activity-context{display:flex;justify-content:space-between;gap:20px;font-size:13px;margin-bottom:24px}.activity-context a{color:var(--color-accent)}.activity-start{max-width:720px;margin:28px auto;padding:42px}.activity-start>svg{color:var(--color-accent);margin-bottom:22px}.activity-start h2{margin-bottom:16px}.activity-start p{color:var(--color-text-secondary);margin-bottom:18px}.activity-start .button{margin-top:12px}.activity-workbench{display:grid;grid-template-columns:220px minmax(0,1fr);gap:28px;align-items:start}.activity-progress{position:sticky;top:110px;padding:20px 0;display:grid;gap:18px}.activity-progress>strong{font-size:1.8rem}.activity-progress nav{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.activity-progress nav button{display:grid;place-items:center;aspect-ratio:1;border:1px solid var(--color-border-strong);border-radius:6px;background:var(--color-surface);color:var(--color-text-primary)}.activity-progress nav .answered{background:var(--color-accent-soft);color:var(--color-accent)}.activity-progress nav .active{outline:2px solid var(--color-accent);outline-offset:2px}.activity-progress small{font-size:12px;color:var(--color-text-secondary)}.activity-timer{display:flex;gap:10px;align-items:center;font-variant-numeric:tabular-nums;font-size:20px}.question-card{padding:36px;min-width:0}.question-card h2{font-size:1.4rem;line-height:1.55;white-space:pre-line;margin:25px 0;letter-spacing:-.02em}.question-meta{display:flex;justify-content:space-between;gap:15px;color:var(--color-text-secondary);font-size:12px;flex-wrap:wrap}.answer-options{display:grid;gap:12px;border:0;padding:0;margin:0}.answer-option{display:flex;gap:14px;align-items:center;border:1px solid var(--color-border);border-radius:8px;padding:18px;cursor:pointer;line-height:1.55}.answer-option.selected,.answer-option:hover{border-color:var(--color-accent)}.answer-option.selected{background:var(--color-accent-soft)}.answer-option input{width:18px;height:18px;flex-shrink:0;accent-color:var(--color-accent)}.option-letter{width:28px;height:28px;border:1px solid var(--color-border-strong);border-radius:5px;display:grid;place-items:center;flex-shrink:0;font-size:12px;font-weight:700}.question-controls{display:flex;justify-content:space-between;gap:10px;margin-top:34px;padding-top:24px;border-top:1px solid var(--color-border)}.submit-confirm{margin-top:24px;padding:22px;background:var(--color-accent-soft);border-radius:8px}.submit-confirm h3{margin-bottom:12px}.submit-confirm p{margin-bottom:18px}.matching-board{position:relative;display:grid;grid-template-columns:43% 43%;justify-content:space-between;margin:20px 0}.matching-board>svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;color:var(--color-accent)}.match-item{position:relative;width:100%;height:72px;margin:4px 0;display:flex;align-items:center;justify-content:flex-start;gap:8px;font-size:13px;border:1px solid var(--color-border-strong);border-radius:8px;background:var(--color-surface);color:var(--color-text-primary);padding:8px;overflow-wrap:anywhere;text-align:left}.match-item small{display:none}.match-item>span{font-size:11px;color:var(--color-text-secondary)}.match-item.selected{outline:2px solid var(--color-accent);outline-offset:1px}.match-item.connected{background:var(--color-accent-soft);border-color:var(--color-accent)}.match-item:disabled{opacity:.7;cursor:default}.order-list{list-style:none;padding:0;display:grid;gap:10px;margin:20px 0}.order-list li{display:flex;gap:10px;align-items:center;padding:12px;border:1px solid var(--color-border);border-radius:8px}.order-list li>span:nth-child(2){flex:1;overflow-wrap:anywhere}.order-list .icon-button{width:34px;min-width:34px;height:36px}.sheet-preview{width:100%;border:1px solid var(--color-border);border-radius:8px;overflow:hidden;padding:0;background:var(--color-surface)}.sheet-preview img{display:block;max-width:100%;max-height:420px;object-fit:contain;margin:auto}.sheet-preview span{gap:8px;padding:10px;font-size:12px;color:var(--color-accent)}.image-overlay,.sheet-preview span{display:flex;justify-content:center}.image-overlay{position:fixed;inset:0;z-index:200;background:var(--color-background);align-items:center;flex-direction:column;gap:15px;padding:25px;overflow:auto}.image-overlay img{max-width:100%;max-height:85vh;object-fit:contain}.formula-input{font-family:ui-monospace,monospace;font-size:17px!important}.rubric{padding:18px;background:var(--color-surface-elevated);border-radius:8px}.rubric p{display:flex;justify-content:space-between;gap:18px;padding:10px 0;border-bottom:1px solid var(--color-border);font-size:13px}.rubric p span{white-space:nowrap;color:var(--color-text-secondary)}.rubric small{display:block;margin-top:12px}.xp-banner{gap:16px;background:var(--color-accent-soft);color:var(--color-accent);padding:22px;border-radius:8px;margin-bottom:20px;font-weight:600}.result-heading,.xp-banner{display:flex;align-items:center}.result-heading{gap:28px;margin-bottom:30px}.grade-number{font-size:4rem;font-weight:700;color:var(--color-accent);white-space:nowrap;font-variant-numeric:tabular-nums}.grade-number small{font-size:1rem;font-weight:400;color:var(--color-text-secondary)}.result-heading h2{margin:12px 0}.result-list details{border-top:1px solid var(--color-border)}.result-list summary{display:flex;gap:20px;justify-content:space-between;cursor:pointer;padding:20px 0;line-height:1.55}.result-list summary strong{white-space:nowrap;font-size:13px}.result-list details>div{background:var(--color-surface-elevated);padding:20px;margin-bottom:15px;border-radius:8px}.attempt-result{margin-bottom:24px}.history-section{margin-top:45px}.history-section>h2{margin-bottom:20px}.history-row{display:flex;justify-content:space-between;gap:15px;padding:18px 0;border-bottom:1px solid var(--color-border);font-size:14px}.score-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--color-border);border:1px solid var(--color-border);border-radius:12px;overflow:hidden;margin:28px 0}.score-grid article{display:grid;gap:14px;padding:26px;background:var(--color-surface)}.score-grid svg{color:var(--color-accent)}.score-grid strong{font-size:2rem;font-weight:650;line-height:1.1}.score-grid strong small{font-size:14px;font-weight:400;color:var(--color-text-secondary)}.score-grid article>span{font-size:13px;color:var(--color-text-secondary)}.evolution-columns{display:grid;grid-template-columns:1fr 1fr;gap:24px}.activity-heatmap{display:grid;grid-template-columns:repeat(14,1fr);gap:6px;margin:22px 0}.activity-heatmap span{aspect-ratio:1;border-radius:4px;background:var(--color-surface-strong);border:1px solid var(--color-border)}.activity-heatmap .studied{background:var(--color-accent);border-color:var(--color-accent)}.achievement-section{margin:35px 0}.achievement-section h2{margin-bottom:22px}.achievement-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.achievement{display:flex;align-items:flex-start;gap:15px;padding:22px;border:1px solid var(--color-border);border-radius:9px;background:var(--color-surface)}.achievement svg{margin-top:3px;color:var(--color-text-muted)}.achievement.earned{border-color:var(--color-accent);background:var(--color-accent-soft)}.achievement.earned svg{color:var(--color-accent)}.achievement strong{font-size:14px}.achievement p{font-size:12px;color:var(--color-text-secondary);margin:8px 0}.achievement small{font-size:11px;color:var(--color-text-secondary)}.profile-form{max-width:720px}.profile-form .check-label{align-items:flex-start}.profile-form .check-label small{margin-top:8px}.public-profile{display:flex;align-items:center;gap:28px;padding:35px 0}.public-profile h1{font-size:2.4rem;margin:8px 0}.profile-avatar{width:44px;height:44px;flex-shrink:0;display:grid;place-items:center;background:var(--color-accent-soft);color:var(--color-accent);border:1px solid var(--color-border);border-radius:50%;font-size:14px;font-weight:700}.public-profile>.profile-avatar{width:88px;height:88px;font-size:28px}.ranking-intro{display:flex;justify-content:space-between;gap:30px;align-items:center;margin:28px 0}.ranking-intro h2{margin:10px 0}.ranking-intro p{color:var(--color-text-secondary);font-size:14px;max-width:600px}.own-rank{display:grid;gap:8px;padding:18px 26px;background:var(--color-accent-soft);border-radius:8px}.own-rank strong{font-size:2rem;color:var(--color-accent)}.own-rank span{font-size:12px}.leaderboard{border:1px solid var(--color-border);border-radius:12px;overflow:hidden;margin-bottom:24px}.ranking-labels{display:flex;justify-content:space-between;background:var(--color-surface-elevated);padding:18px 24px;font-size:12px;color:var(--color-text-secondary)}.ranking-row{display:flex;gap:18px;align-items:center;padding:20px 24px;background:var(--color-surface);border-top:1px solid var(--color-border)}.ranking-row.is-you{background:var(--color-accent-soft)}.rank-position{font-size:18px;font-weight:700;width:26px;text-align:center}.rank-name{flex:1;min-width:0;overflow-wrap:anywhere}.rank-name strong{font-size:14px}.rank-name small{display:block;margin-top:5px;font-size:12px;color:var(--color-text-secondary)}.ranking-row>strong{white-space:nowrap;font-size:18px}.ranking-row>strong small{font-size:12px;font-weight:400}.submitted-answer{white-space:pre-wrap;overflow-wrap:anywhere;padding-top:12px}.question-workbench{display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px;align-items:start}.question-outline{padding:20px 0;position:sticky;top:100px}.question-outline h2{font-size:18px}.question-outline p{font-size:12px;color:var(--color-text-secondary);margin:10px 0}.question-outline nav{display:grid;gap:8px;margin-bottom:20px}.question-outline nav button{display:flex;text-align:left;gap:12px;align-items:center;padding:14px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-surface);color:var(--color-text-primary);min-width:0}.question-outline nav button.active{background:var(--color-accent-soft);border-color:var(--color-accent)}.question-outline nav button>span:last-child{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:13px}.question-outline nav button small{display:block;font-size:11px;margin-top:5px;color:var(--color-text-secondary)}.assessment-editor{margin-top:28px}.assessment-editor .editor-panel{min-width:0}.assessment-editor .button-row{flex-wrap:wrap}.option-editor{display:flex;gap:8px;align-items:center;margin-bottom:10px}.option-editor input[type=text]{flex:1}.criterion-editor{padding:18px;border:1px solid var(--color-border);border-radius:8px;margin:16px 0;display:grid;gap:12px}.editor-notice{padding:18px;background:var(--color-accent-soft);border-radius:8px;font-size:13px;margin:18px 0}.editor-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:20px 0}.text-button{color:var(--color-accent);background:transparent;border:0;text-decoration:underline;font-size:13px;padding:6px 0}.practice-callout{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:25px;background:var(--color-accent-soft);border-radius:10px;margin:25px 0}.practice-callout h2{font-size:1.2rem;margin-bottom:8px}.practice-callout p{font-size:14px;color:var(--color-text-secondary)}.learning-page .button:disabled{opacity:.55;cursor:wait}.learning-page .icon-button:disabled,.question-controls .button:disabled{opacity:.45;cursor:default}@media(max-width:900px){.activity-workbench{grid-template-columns:1fr}.activity-progress{position:static;padding:0;grid-template-columns:1fr auto;gap:12px}.activity-progress>.intro-kicker,.activity-progress>.progress-track{grid-column:1/-1}.activity-progress nav{display:flex;flex-wrap:wrap;grid-column:1/-1;gap:10px}.activity-progress nav button{width:36px;height:36px}.activity-progress>strong{font-size:1rem}.achievement-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.question-workbench{grid-template-columns:1fr}.question-outline{position:static;padding:0}.question-outline nav{display:flex;overflow:auto;padding:3px}.question-outline nav button{min-width:150px;max-width:200px}.question-outline .button{width:auto}.score-grid article{padding:20px}.evolution-columns{gap:15px}}@media(max-width:600px){.learning-page{padding-top:18px;padding-bottom:45px}.learning-nav{margin-bottom:28px;gap:2px}.learning-nav a{font-size:12px;padding:9px 10px}.learning-heading>p:last-child{font-size:15px}.activity-grid,.evolution-columns{grid-template-columns:1fr}.activity-card,.activity-start,.attempt-result,.learning-panel,.question-card{padding:20px}.activity-start{margin:20px 0}.score-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.score-grid strong{font-size:1.8rem}.achievement-grid{grid-template-columns:1fr}.achievement{padding:18px}.filter-form label{min-width:0;width:100%}.filter-form select{width:100%}.question-card h2{font-size:1.15rem;margin:20px 0}.answer-option{padding:14px 12px;gap:10px;font-size:14px}.answer-option .option-letter{display:none}.question-controls{gap:8px}.question-controls .button{padding:10px;font-size:12px}.question-controls .button svg{width:14px}.question-meta{font-size:11px}.matching-board{grid-template-columns:45% 45%}.match-item{font-size:11px;padding:6px;gap:4px}.match-item svg{width:12px}.order-list li{padding:9px;gap:6px;font-size:12px}.order-list .icon-button{width:28px;min-width:28px}.result-heading{gap:16px;align-items:flex-start;flex-direction:column}.grade-number{font-size:3rem}.result-list summary{font-size:13px;gap:12px;align-items:flex-start}.result-list summary strong{font-size:11px}.ranking-intro{align-items:flex-start;flex-direction:column;gap:18px}.ranking-row{padding:16px 12px;gap:10px}.ranking-row .profile-avatar{display:none}.ranking-labels{padding:15px 12px}.ranking-row>strong{font-size:15px}.rank-name small{font-size:11px}.public-profile{gap:15px;align-items:flex-start}.public-profile>.profile-avatar{width:50px;height:50px;font-size:18px}.public-profile h1{font-size:1.8rem}.public-profile p{font-size:13px}.history-row{flex-direction:column;gap:8px}.practice-callout{align-items:flex-start;flex-direction:column}.assessment-editor .form-grid{grid-template-columns:1fr}.rubric p{font-size:12px}.image-overlay{padding:12px}.question-outline nav button{min-width:130px}}@media(prefers-reduced-motion:reduce){.learning-page *{scroll-behavior:auto!important;transition:none!important}}.option-editor-row{display:flex;gap:10px;align-items:center;margin:12px 0}.option-editor-row>input:not([type=radio]):not([type=checkbox]){flex:1;width:100%;min-width:0}.option-editor-row input[type=checkbox],.option-editor-row input[type=radio]{width:18px;height:18px;flex-shrink:0;accent-color:var(--color-accent)}.rubric-editor{display:grid;gap:14px;padding:18px;border:1px solid var(--color-border);border-radius:8px;margin-bottom:18px}.content-notice{display:flex;gap:12px;padding:18px;background:var(--color-accent-soft);border-radius:8px}.content-notice p{font-size:13px}.answer-editor h3{margin-bottom:12px}.answer-editor p{font-size:13px;color:var(--color-text-secondary)}.text-link{background:transparent;border:0;color:var(--color-accent);padding:10px 0;text-decoration:underline;font-size:13px}.editor-footer{margin-top:24px;display:grid;gap:20px}.editor-footer small{color:var(--color-text-secondary)}dialog.image-overlay{width:100vw;height:100dvh;max-width:100vw;max-height:100dvh;border:0;margin:0;color:var(--color-text-primary)}dialog.image-overlay::backdrop{background:var(--color-background)}.review-request{margin-top:24px;padding-top:20px;border-top:1px solid var(--color-border);display:grid;justify-items:start;gap:12px}.review-request>p[role=status]{font-size:13px;color:var(--color-accent)}.question-edit,.question-outline,.question-outline nav,.question-workbench{min-width:0;max-width:100%}.question-outline nav button{flex-shrink:0}.question-edit>.panel-heading>.button-row{flex-direction:row;width:auto}.question-edit>.panel-heading>.button-row .icon-button{width:38px;min-width:38px}.question-edit>.panel-heading{flex-wrap:wrap}.sheet-preview img{min-height:160px}@media(max-width:900px){.question-workbench{grid-template-columns:minmax(0,1fr)}}.excel-landing{--launch-dark:var(--color-art);--launch-light:var(--color-art-text);--launch-muted:var(--color-art-muted)}.launch-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:60px;align-items:center;padding-top:76px;padding-bottom:64px}.launch-copy h1{font-size:clamp(2.5rem,4.8vw,4.4rem);line-height:1.08;letter-spacing:-.055em;margin:20px 0 24px}.launch-copy h1 span{color:var(--color-accent)}.launch-lead{font-size:18px;color:var(--color-text-secondary);max-width:480px;margin-bottom:28px}.launch-price{display:grid;gap:7px;margin-bottom:26px}.launch-price>span{font-size:11px;text-transform:uppercase;letter-spacing:.11em;color:var(--color-text-secondary);font-weight:700}.launch-price>div{display:flex;align-items:baseline;gap:16px}.launch-price strong{font-size:32px;letter-spacing:-.05em}.launch-price del{font-size:16px;color:var(--color-text-muted)}.launch-price small{font-size:12px}.launch-price small,.launch-secondary{color:var(--color-accent);font-weight:600}.launch-secondary{font-size:13px;text-underline-offset:5px}.launch-secondary:hover{text-decoration:underline}.launch-disclosure{font-size:11px!important;color:var(--color-text-muted);margin-top:18px;max-width:460px}.excel-demo{border:1px solid var(--color-border-strong);border-radius:14px;background:var(--color-surface);box-shadow:0 24px 70px var(--color-shadow);padding:24px;min-width:0;transform:rotate(-1deg)}.demo-heading{display:flex;justify-content:space-between;align-items:center;gap:8px;color:var(--color-accent);font-size:9px;font-weight:700;letter-spacing:.09em;margin-bottom:22px}.demo-heading button{border:1px solid var(--color-border);border-radius:50%;width:32px;height:32px;display:grid;place-items:center;background:var(--color-surface);color:var(--color-text-primary)}.demo-formula{display:flex;align-items:center;border:1px solid var(--color-border);border-radius:5px;margin-bottom:12px;min-height:40px;font-size:11px}.demo-formula>span{padding:10px 14px;font-size:17px;border-right:1px solid var(--color-border);color:var(--color-accent)}.demo-formula code{padding:8px;font-family:var(--font-body);overflow-wrap:anywhere}.demo-work{position:relative;min-height:280px}.excel-demo table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:11px}.excel-demo td,.excel-demo th{border:1px solid var(--color-border);padding:13px 8px;text-align:left;white-space:normal}.excel-demo thead th{font-weight:500}.excel-demo th:first-child,.excel-demo thead th{background:var(--color-surface-elevated);text-align:center;color:var(--color-text-secondary)}.excel-demo th:first-child{width:28px;font-weight:400}.excel-demo tbody tr:first-child td{font-weight:700;background:var(--color-accent-soft);color:var(--color-accent)}.excel-demo .cell-highlight{background:var(--color-accent-soft)}.demo-total{font-weight:700;color:var(--color-accent);transition:background .3s}.demo-chart{position:absolute;inset:4px 0 0;background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;padding:24px;opacity:0;pointer-events:none;transition:opacity .4s}.demo-chart.visible{opacity:1}.demo-chart>span{font-size:13px;font-weight:600}.demo-chart>div{display:grid;gap:14px;margin-top:22px}.demo-chart>div>div{display:grid;gap:7px}.demo-chart span{font-size:11px}.demo-chart i{display:block;height:24px;background:var(--color-accent);border-radius:3px;transition:width .7s var(--ease-out)}.demo-steps{display:flex;gap:8px;margin-top:20px}.demo-steps button{flex:1;display:flex;align-items:center;gap:7px;border:0;border-radius:6px;background:var(--color-surface-elevated);color:var(--color-text-secondary);padding:10px 8px;font-size:11px}.demo-steps button[aria-pressed=true]{background:var(--color-accent-soft);color:var(--color-accent)}.demo-steps span{font-size:10px}.excel-demo>small{display:block;font-size:10px;color:var(--color-text-muted);margin-top:16px}.launch-facts{display:flex;gap:25px;justify-content:space-between;padding:25px 0;border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);font-size:12px;color:var(--color-text-secondary)}.launch-facts span{display:flex;gap:9px;align-items:center}.launch-facts svg{color:var(--color-accent)}.launch-section{padding-top:84px;padding-bottom:84px;scroll-margin-top:95px}.launch-section-heading{max-width:760px;margin-bottom:38px}.launch-section h2{font-size:clamp(1.8rem,3.3vw,2.8rem);line-height:1.18;margin:12px 0 18px;letter-spacing:-.045em}.launch-section-heading>p:last-child{color:var(--color-text-secondary);font-size:16px}.mini-practice{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center;padding:40px;border:1px solid var(--color-border);border-radius:14px;background:var(--color-surface)}.mini-practice h3{font-size:1.6rem;margin:12px 0 18px;line-height:1.3}.mini-practice p{color:var(--color-text-secondary)}.mini-options{display:grid;gap:10px}.mini-options button{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--color-border-strong);background:var(--color-surface);color:var(--color-text-primary);border-radius:8px;padding:18px;font-size:15px}.mini-options button.selected{background:var(--color-accent-soft);border-color:var(--color-accent)}.mini-feedback{display:flex;gap:10px;font-size:13px;padding:12px 0}.mini-feedback svg{color:var(--color-accent)}.launch-outcomes{background:var(--color-surface-elevated)}.outcome-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:42px}.outcome-columns article{border-top:1px solid var(--color-border-strong);padding-top:22px}.outcome-columns article>span{font-size:13px;color:var(--color-accent)}.outcome-columns h3{font-size:1.2rem;margin:24px 0 12px}.outcome-columns p{color:var(--color-text-secondary);font-size:14px}.project-gallery{border:1px solid var(--color-border);border-radius:14px;overflow:hidden;background:var(--color-surface)}.project-gallery [role=tablist]{display:flex;border-bottom:1px solid var(--color-border);background:var(--color-surface-elevated)}.project-gallery [role=tab]{flex:1;border:0;background:transparent;padding:20px;font-size:13px;color:var(--color-text-secondary)}.project-gallery [aria-selected=true]{background:var(--color-surface);color:var(--color-accent);box-shadow:inset 0 -2px var(--color-accent)}.project-preview{display:grid;grid-template-columns:1fr 1.2fr;gap:50px;padding:48px;align-items:center;min-height:300px}.project-preview h3{font-size:1.8rem;margin:16px 0}.project-preview p{font-size:14px;color:var(--color-text-secondary)}.project-visual{padding:24px;border:1px solid var(--color-border);border-radius:8px;min-width:0}.pv-heading{font-size:11px;color:var(--color-text-secondary);padding-bottom:15px}.pv-heading,.pv-row{display:flex;justify-content:space-between;border-bottom:1px solid var(--color-border)}.pv-row{position:relative;align-items:center;gap:20px;padding:22px 0 13px;font-size:12px}.pv-row i{position:absolute;bottom:0;left:0;height:3px;background:var(--color-accent);transition:width .35s}.project-visual>small{font-size:10px;display:block;margin-top:16px;color:var(--color-text-muted)}.launch-curriculum{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:85px}.launch-curriculum>div:first-child>p:not(.intro-kicker){color:var(--color-text-secondary);font-size:15px}.launch-curriculum small{font-size:12px;color:var(--color-text-secondary);line-height:1.7;display:block}.curriculum-status{display:grid;gap:8px;margin:25px 0;font-size:13px}.curriculum-status strong{color:var(--color-accent)}.curriculum-status span{color:var(--color-text-secondary)}.launch-timeline{border-top:1px solid var(--color-border-strong)}.launch-timeline details{border-bottom:1px solid var(--color-border)}.launch-timeline summary{display:flex;gap:22px;padding:25px 0;cursor:pointer;align-items:center}.launch-timeline summary>span:first-child{color:var(--color-accent);font-size:13px}.launch-timeline summary strong{flex:1;font-size:16px;line-height:1.4}.launch-timeline details>div{padding:0 25px 25px 40px;font-size:14px;color:var(--color-text-secondary)}.launch-timeline details>div>strong{display:block;color:var(--color-text-primary);margin-top:18px;font-size:12px}.launch-method{background:var(--launch-dark);color:var(--launch-light)}.launch-method .intro-kicker{color:var(--launch-muted)}.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.method-grid>div>p:not(.intro-kicker){color:var(--launch-muted);margin-bottom:25px}.launch-method .button{background:var(--launch-light);color:var(--launch-dark)}.method-grid ol{list-style:none;padding:0;display:grid;gap:30px}.method-grid li{display:flex;gap:22px}.method-grid li>span{border:1px solid var(--color-art-line);width:38px;height:38px;display:grid;place-items:center;border-radius:50%;font-size:13px;flex-shrink:0}.method-grid h3{font-size:1.05rem;margin-bottom:8px}.method-grid li p{font-size:13px;color:var(--launch-muted)}.instructor-section{display:grid;grid-template-columns:1fr 1.4fr;gap:80px;align-items:center}.instructor-monogram{min-height:250px;display:flex;align-items:center;justify-content:center;flex-direction:column;background:var(--color-surface-elevated);border:1px solid var(--color-border);color:var(--color-accent);border-radius:12px;font-size:100px;font-weight:800;letter-spacing:-.07em}.instructor-monogram span{font-size:9px;letter-spacing:.18em;margin-top:12px}.instructor-section p:not(.intro-kicker){color:var(--color-text-secondary);margin-bottom:18px}.final-offer{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;padding:50px;border:1px solid var(--color-border-strong);border-radius:16px;background:var(--color-surface)}.final-offer>div>p:not(.intro-kicker){color:var(--color-text-secondary);margin:20px 0}.final-offer ul{list-style:none;padding:0;margin:28px 0 0;display:grid;gap:17px}.final-offer li{display:flex;align-items:center;gap:10px;font-size:13px}.final-offer li svg{color:var(--color-accent)}.offer-ticket{padding:28px;background:var(--color-accent-soft);border-radius:10px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}.offer-ticket>span{font-size:12px;color:var(--color-text-secondary)}.offer-ticket del{font-size:20px;color:var(--color-text-secondary);margin:8px 0 22px}.offer-ticket>strong{font-size:clamp(2rem,4vw,3.2rem);letter-spacing:-.05em;line-height:1.3;color:var(--color-accent);margin-top:8px}.offer-ticket>p{font-size:13px}.offer-ticket small{font-size:11px;color:var(--color-text-secondary);line-height:1.7;margin-top:16px}.launch-faq{display:grid;grid-template-columns:.8fr 1.2fr;gap:75px}.launch-faq details{border-bottom:1px solid var(--color-border)}.launch-faq summary{display:flex;justify-content:space-between;gap:15px;padding:21px 0;font-size:14px;font-weight:600;cursor:pointer}.launch-faq details p{color:var(--color-text-secondary);font-size:14px;padding-bottom:22px}.sticky-offer{display:none}.learning-more{position:relative;margin-left:auto;font-size:13px}.learning-more summary{padding:10px;cursor:pointer}.learning-more>div{position:absolute;right:0;z-index:50;min-width:220px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;padding:10px;box-shadow:0 10px 30px var(--color-shadow)}.learning-more a{display:block}.mobile-learning-nav{display:none}.today-focus{display:grid;grid-template-columns:1.5fr 1fr;gap:50px;padding:38px;background:var(--color-accent-soft);border-radius:14px;margin-bottom:24px}.today-focus h2{font-size:1.9rem;margin:14px 0;line-height:1.3}.today-focus p:not(.intro-kicker){color:var(--color-text-secondary);margin-bottom:24px}.today-goal{align-self:center;display:grid;gap:15px}.today-goal>strong{font-size:3rem;color:var(--color-accent)}.today-goal small{font-size:16px;font-weight:400}.today-goal>span{font-size:13px}.today-goal>a{font-size:12px;color:var(--color-accent)}.today-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:30px}.today-links a{padding:22px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-surface);display:grid;gap:12px}.today-links strong{font-size:15px}.today-links span{font-size:12px;color:var(--color-text-secondary)}.search-learning{padding:28px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;margin:24px 0}.search-learning label{display:block;font-size:14px;font-weight:600;margin-bottom:12px}.search-learning>div{display:flex;gap:12px}.search-learning input{flex:1}.search-results{display:grid;gap:15px;margin:25px 0}.search-results>a{display:block;padding:26px;border:1px solid var(--color-border);border-radius:9px;background:var(--color-surface)}.search-results h2{font-size:18px;margin:12px 0}.search-results p{font-size:14px;color:var(--color-text-secondary)}.lab-workspace{display:grid;grid-template-columns:260px minmax(0,1fr);gap:28px}.lab-workspace>aside h2{font-size:17px;margin-bottom:22px}.lab-workspace>aside>button{width:100%;display:flex;gap:16px;text-align:left;background:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border);border-radius:8px;padding:18px;margin-bottom:10px}.lab-workspace>aside>button[aria-pressed=true]{background:var(--color-accent-soft);border-color:var(--color-accent)}.lab-workspace aside strong{display:block;font-size:13px}.lab-workspace aside small{display:block;font-size:11px;color:var(--color-text-secondary);margin-top:8px}.lab-workspace aside>p{font-size:12px;color:var(--color-text-secondary);margin-top:25px}.lab-formula{display:flex;border:1px solid var(--color-border-strong);border-radius:6px;overflow:hidden;margin:24px 0 14px}.lab-formula>span{display:grid;place-items:center;padding:12px;border-right:1px solid var(--color-border);font-weight:700;color:var(--color-accent);font-size:13px}.lab-formula input{border:0!important;border-radius:0!important;flex:1;width:100%;min-width:0;font-family:var(--font-body)}.lab-table{overflow:auto;margin-bottom:24px}.lab-table table{width:100%;border-collapse:collapse;table-layout:fixed}.lab-table td,.lab-table th{border:1px solid var(--color-border);padding:16px;font-size:14px;overflow-wrap:anywhere}.lab-table th{background:var(--color-surface-elevated);font-size:12px;text-align:center;font-weight:500}.lab-table th:first-child{width:40px}.lab-target{background:var(--color-accent-soft)}.lab-target button{display:block;width:100%;padding:0;border:0;background:transparent;color:var(--color-accent);font-weight:600;text-align:left;overflow-wrap:anywhere}.lab-feedback,.lab-hint{padding:20px;background:var(--color-surface-elevated);border-radius:8px;margin:20px 0;font-size:14px}.lab-workspace .learning-panel>small{margin-top:22px}.studio-form{max-width:940px}.studio-form h2{margin-top:20px}.studio-step{display:grid;gap:16px;padding:22px;border:1px solid var(--color-border);border-radius:8px;margin-bottom:14px}.studio-step h3{margin-bottom:4px}.studio-form fieldset{padding:18px;border:1px solid var(--color-border);border-radius:8px;display:grid;gap:10px}.project-criteria{padding-left:20px;margin:20px 0;color:var(--color-text-secondary)}.project-criteria li{margin:9px 0;font-size:13px}.project-result{padding:20px;border-top:1px solid var(--color-border);margin-top:24px}.project-result p{font-size:13px;margin-top:15px}.certificate-page{padding:45px 0}.certificate{padding:70px;border:2px solid var(--color-accent);background:var(--color-surface);text-align:center;max-width:1000px;margin:0 auto 25px}.certificate img{margin:0 auto 35px}.certificate h1{font-size:3rem;margin:24px 0}.certificate h2{font-size:2rem;color:var(--color-accent);margin:25px 0}.certificate>p{max-width:700px;margin:16px auto;color:var(--color-text-secondary)}.certificate-sign{display:grid;gap:8px;margin:45px auto 35px;max-width:250px;padding-top:20px;border-top:1px solid var(--color-border)}.certificate-sign span{font-size:12px;color:var(--color-text-secondary)}.certificate footer{display:grid;gap:8px;font-size:10px;color:var(--color-text-muted);overflow-wrap:anywhere}.player-study-tools{padding:20px;border:1px solid var(--color-border);background:var(--color-surface);border-radius:0 0 10px 10px}.player-study-tools .button-row{align-items:flex-end}.player-study-tools label{display:grid;gap:8px;font-size:12px}.player-study-tools input,.player-study-tools select{padding:10px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-primary);border-radius:5px}.player-study-tools details{border-top:1px solid var(--color-border);margin-top:18px;padding-top:14px}.player-study-tools summary{cursor:pointer;font-size:13px;margin-bottom:12px}.transcript-cue{display:flex;gap:16px;width:100%;text-align:left;border:0;background:transparent;padding:12px 0;color:var(--color-text-primary);font-size:13px;line-height:1.6}.transcript-cue span{color:var(--color-accent);font-size:11px;min-width:45px}.transcript-cue:hover{text-decoration:underline}.transcript-list{max-height:320px;overflow:auto}.study-tabs{margin:25px 0}.study-tabs>[role=tablist]{display:flex;gap:5px;border-bottom:1px solid var(--color-border);padding-bottom:10px;margin-bottom:25px;flex-wrap:wrap}.study-tabs [role=tab]{padding:12px 16px;border:0;border-radius:6px;color:var(--color-text-secondary);background:transparent;font-size:13px}.study-tabs [aria-selected=true]{background:var(--color-accent-soft);color:var(--color-accent)}.study-tabs [role=tabpanel][hidden]{display:none}.lesson-tools-single{padding:25px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px}.lesson-tools-single form{display:grid;gap:14px;margin-top:20px}.lesson-tools-single label{display:grid;gap:10px}.lesson-tools-single textarea{padding:15px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-primary);border-radius:6px;min-height:110px}.diagnostic{max-width:800px}.diagnostic fieldset{border:0;padding:20px 0;display:grid;gap:10px}.diagnostic legend{padding:20px 0 0;font-weight:600;line-height:1.5}.diagnostic fieldset>p{font-size:13px;color:var(--color-accent)}@media(max-width:1000px){.launch-hero{gap:28px}.launch-copy h1{font-size:3rem}.launch-hero .button-row{flex-direction:column;align-items:flex-start}.launch-facts{display:grid;grid-template-columns:1fr 1fr;gap:22px}.launch-curriculum,.method-grid{gap:45px}.final-offer,.project-preview{padding:30px;gap:30px}.lab-workspace{grid-template-columns:210px minmax(0,1fr)}}@media(max-width:768px){.launch-hero{grid-template-columns:minmax(0,1fr);padding-top:42px;gap:35px}.launch-copy h1{font-size:clamp(2.4rem,7vw,3.8rem)}.excel-demo{transform:none;max-width:600px;width:100%}.launch-section{padding-top:55px;padding-bottom:55px}.final-offer,.instructor-section,.launch-curriculum,.launch-faq,.method-grid,.mini-practice,.project-preview{grid-template-columns:minmax(0,1fr);gap:30px}.outcome-columns{gap:22px}.instructor-monogram{min-height:180px;font-size:75px}.launch-faq{gap:20px}.today-focus{grid-template-columns:minmax(0,1fr);gap:25px}.today-goal{max-width:400px;width:100%}.today-links{grid-template-columns:repeat(2,minmax(0,1fr))}.lab-workspace{grid-template-columns:minmax(0,1fr)}.lab-workspace>aside{display:grid;grid-template-columns:1fr 1fr;gap:8px}.lab-workspace>aside>h2,.lab-workspace>aside>p{grid-column:1/-1}.lab-workspace>aside>button{margin:0}.certificate{padding:30px}.certificate h1{font-size:2rem}.certificate h2{font-size:1.5rem}.learning-more{margin-left:0}.mobile-learning-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:70;border-top:1px solid var(--color-border);background:var(--color-surface);padding:10px 6px max(10px,env(safe-area-inset-bottom));justify-content:space-around}.mobile-learning-nav a{font-size:11px;padding:10px;border-radius:6px}.mobile-learning-nav [aria-current]{background:var(--color-accent-soft);color:var(--color-accent)}body:has(.mobile-learning-nav){padding-bottom:65px}.sticky-offer{display:flex;position:fixed;bottom:0;left:0;right:0;padding:12px 16px max(12px,env(safe-area-inset-bottom));background:var(--color-surface);border-top:1px solid var(--color-border);z-index:70;align-items:center;justify-content:space-between;gap:10px}.sticky-offer>span{font-size:10px;color:var(--color-text-secondary);display:grid;gap:5px}.sticky-offer strong{font-size:18px;color:var(--color-text-primary)}.sticky-offer .button{min-height:42px;font-size:12px;padding:10px 15px}body:has(.excel-landing){padding-bottom:74px}}@media(max-width:480px){.launch-hero{padding-top:30px;padding-bottom:35px}.launch-copy h1{font-size:2.55rem}.launch-lead{font-size:16px}.launch-price strong{font-size:29px}.launch-hero .button-row{gap:17px}.launch-facts{font-size:10px;gap:18px 12px}.launch-facts svg{width:15px}.excel-demo{padding:16px}.demo-heading{font-size:8px;letter-spacing:.03em}.excel-demo td,.excel-demo th{padding:12px 5px;font-size:10px}.demo-steps{gap:5px}.demo-steps button{font-size:10px;padding:10px 5px;gap:5px}.demo-work{min-height:270px}.mini-practice{padding:22px;gap:25px}.mini-practice h3{font-size:1.35rem}.mini-practice p{font-size:14px}.mini-options button{font-size:13px;padding:16px}.outcome-columns{grid-template-columns:minmax(0,1fr);gap:28px}.outcome-columns h3{margin:12px 0}.project-gallery [role=tablist]{flex-direction:column}.project-gallery [role=tab]{text-align:left;padding:14px 20px}.project-preview{padding:22px}.project-preview h3{font-size:1.5rem}.project-visual{padding:16px}.launch-curriculum{gap:25px}.launch-timeline summary{gap:14px;padding:22px 0}.launch-timeline summary strong{font-size:14px}.launch-timeline details>div{padding:0 0 20px 32px}.method-grid li{gap:15px}.final-offer,.offer-ticket{padding:22px}.offer-ticket>strong{font-size:2.4rem}.launch-faq summary{font-size:13px}.today-focus{padding:25px}.today-focus h2{font-size:1.5rem}.today-goal>strong{font-size:2.5rem}.today-links{gap:10px}.today-links a{padding:17px}.today-links strong{font-size:13px}.search-learning{padding:20px}.search-learning>div{flex-direction:column}.lab-workspace>aside>button{padding:12px;gap:10px}.lab-workspace aside strong{font-size:12px}.lab-workspace aside small{font-size:10px}.lab-table td,.lab-table th{padding:12px 8px;font-size:12px}.lab-table th:first-child{width:26px}.lab-formula input{font-size:13px}.studio-step{padding:16px}.player-study-tools{padding:15px}.study-tabs [role=tab]{padding:10px;font-size:12px}.certificate{padding:22px}.certificate>p{font-size:13px}.certificate footer{font-size:9px}.learning-more>div{left:0;right:auto}.lesson-tools-single{padding:18px}}@media(prefers-reduced-motion:reduce){.excel-landing *{animation:none!important;transition:none!important;scroll-behavior:auto!important}.excel-demo{transform:none}}@media print{.mobile-learning-nav,.no-print,.site-header{display:none!important}body{padding:0!important;background:var(--color-print-paper)!important}.certificate-page{width:100%;padding:0}.certificate{margin:0;border-color:var(--color-print-accent);color:var(--color-print-ink);background:var(--color-print-paper);padding:30px;break-inside:avoid}.certificate *{color:inherit!important}.certificate img{filter:none!important}.certificate footer{font-size:9px}@page{size:A4 landscape;margin:15mm}}