@font-face{font-family:PaperSans;src:url('assets/fonts/noto-sans-sc.woff2') format('woff2');font-display:swap;font-weight:100 900}@font-face{font-family:PaperSerif;src:url('assets/fonts/noto-serif-sc.woff2') format('woff2');font-display:swap;font-weight:100 900}
:root{--ease-out:cubic-bezier(.23,1,.32,1);--ease-move:cubic-bezier(.77,0,.175,1);--motion:220ms;--serif:PaperSerif,serif;--sans:PaperSans,sans-serif}
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var(--ease-out)}.demo-footnote{margin-top:13px;display:flex;justify-content:space-between;gap:16px;color:var(--textMuted);font-size:10px}.section-line>p:last-child:not(.eyebrow){font-size:14px;color:var(--textSecondary);margin-top:8px}.product{padding-top:84px;padding-bottom:38px}.value-strip{display:grid;grid-template-columns:repeat(3,1fr);margin-top:26px;padding:25px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.value-strip article{display:flex;gap:20px;padding:0 24px;border-right:1px solid var(--border)}.value-strip article:first-child{padding-left:0}.value-strip article:last-child{border:0}.value-strip article>span{font-family:var(--serif);font-size:27px;color:var(--accent)}.value-strip h3{font-family:var(--sans);font-size:16px}.value-strip 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mark.is-evidence{background:var(--highlight);box-decoration-break:clone;-webkit-box-decoration-break:clone;color:var(--textPrimary)}.reading-options{margin-top:15px;border-top:1px solid var(--border);padding-top:10px}.reading-options>p{font-size:12px;margin-bottom:7px;font-weight:500}.reading-option{font-family:Georgia,serif;font-size:13px;padding:7px 9px;border:1px solid transparent;border-radius:4px;margin:4px 0}.reading-option.wrong{border-color:var(--accent);background:var(--secondaryAccent)}.reading-option.correct{border-color:var(--primary);background:var(--accentSoft)}dialog{width:min(440px,calc(100vw - 36px));border:1px solid var(--border);border-radius:8px;padding:34px;background:var(--surface);color:var(--textPrimary)}dialog::backdrop{background:#183a3240}dialog h2{font-size:26px}dialog>p:not(.eyebrow){font-size:13px;margin:18px 0 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@keyframes message-enter{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes blink{50%{opacity:0}}@keyframes click-ring{0%{transform:scale(.65);opacity:.7}100%{transform:scale(1.4);opacity:0}}
@media(hover:hover) and (pointer:fine){a:hover{color:var(--accentInk)}.button:hover{color:var(--surface);background:var(--primaryStrong)}.button.outline:hover{color:var(--primary);background:var(--accentSoft)}.play-controls button:not(:first-child):hover{background:var(--inset)}}
@media(max-width:1000px){.header-inner{padding:18px 24px}.brand small,.site-header nav{display:none}.masthead{gap:25px;grid-template-columns:1.3fr 1fr}h1{font-size:38px;letter-spacing:-1px}.hero-note{padding-left:0}.hero-note>p{font-size:13px}.demo-body{grid-template-columns:48% 52%;height:555px}.material-heading{padding-inline:18px}.material-content{padding-inline:18px}.conversation-scroll{padding-inline:18px}.toolbar-tag{display:none}.loop-track small{font-size:9px}.site-footer{flex-wrap:wrap}.site-footer>div{gap:15px}}
@media(max-width:640px){html{scroll-padding-top:20px}.shell{padding-inline:20px}.header-inner{padding:15px 20px;gap:10px;flex-wrap:wrap}.brand>span{font-size:19px}.brand img{width:25px;height:25px}.header-actions{gap:12px;font-size:11px}.header-actions .button{display:none}.hero{padding-top:37px}.masthead{display:block;margin-bottom:28px}h1{font-size:31px;line-height:1.5;letter-spacing:-1.1px}.eyebrow{font-size:10px;margin-bottom:10px}.hero-note{margin-top:20px}.hero-note>p{font-size:12px;line-height:1.95}.hero-note .actions{margin:17px 0 10px}.button{min-height:44px;font-size:12px;padding:9px 18px;gap:20px}.hero-note .quiet{font-size:10px}.demo-intro{display:block}.demo-intro>p{font-size:10px;margin:5px 0 10px}.demo-window{border-radius:6px}.window-toolbar{padding:10px 12px;gap:8px}.window-brand>span{display:none}.window-brand strong{font-size:13px}.window-brand img{width:18px;height:18px}.subject-tabs{gap:1px;padding:2px}.subject-tabs button{min-width:39px;min-height:33px;padding:4px 8px;font-size:11px}.demo-body{display:flex;flex-direction:column;height:830px}.material-pane{border-right:0;border-bottom:1px solid var(--border);height:395px;flex-shrink:0}.material-heading{padding:16px 14px 10px}.material-heading h2{font-size:14px}.material-heading .pill{font-size:9px;padding:3px 6px}.material-content{padding:0 14px 12px}.question-copy{font-size:11px;line-height:1.8}.task-list{font-size:11px;margin:6px 0}.math-plot{height:205px}.diagram-paper{margin-top:5px}.diagram-note{font-size:9px}.conversation-pane{flex:1;min-height:0}.conversation-heading{padding:12px 14px}.conversation-scroll{padding:14px;font-size:12px}.chat-message{font-size:12px;margin-bottom:12px;line-height:1.9}.chat-message h4{font-size:13px}.chat-message .math{font-size:12px}.equation-line{padding:8px;font-size:12px}.chat-message .equation-line{font-size:12px}.composer-demo{margin:0 14px 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