.act{padding-block:clamp(48px,4.5vw,72px)}.act-row{display:grid;gap:32px;align-items:center}.act-copy{display:grid;gap:14px;align-content:start;max-width:560px}.act-visual{display:grid;min-width:0}@media(min-width:1024px){.act-row{grid-template-columns:repeat(12,minmax(0,1fr));column-gap:24px}.act-copy{grid-column:1 / span 5;padding-right:clamp(0px,3vw,48px)}.act-visual{grid-column:6 / span 7}}@media(min-width:768px)and (max-width:1023.98px){.act-visual{width:min(100%,720px)}}@media(max-width:360px){.act-visual{display:none}}.act-lib{--p-canvas: var(--color-neutral-100);--p-card: var(--color-white);--p-border: var(--color-neutral-200);--p-text: var(--color-neutral-900);--p-secondary: var(--color-neutral-700);--p-muted: color-mix(in srgb, var(--color-neutral-600) 50%, var(--color-neutral-700));--p-primary: var(--color-neutral-950);--p-hue: var(--color-lavender-200)}.act-lib{display:grid;gap:16px;padding:20px;border-radius:var(--radius-xl);background-color:var(--p-canvas);box-shadow:0 0 0 1px var(--frame-hairline),var(--frame-shadow);color:var(--p-text);font-family:var(--font-sans);user-select:none}.act-lib svg{flex:none}.act-lib__head{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:0}.act-lib__title{display:inline-flex;align-items:center;gap:10px;min-width:0;font-size:18px;font-weight:600;line-height:1.2;letter-spacing:-.01em;white-space:nowrap}.act-lib__new{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 16px;border-radius:9px;background-color:var(--p-primary);color:var(--color-white);font-size:13.5px;font-weight:600;white-space:nowrap}.act-lib__filters{display:flex;align-items:center;gap:8px;min-width:0}.act-lib__search{display:flex;flex:1;align-items:center;gap:10px;min-width:0;max-width:440px;height:44px;padding:0 16px;border-radius:var(--radius-lg);background-color:var(--p-card);box-shadow:inset 0 0 0 1px var(--p-border);color:var(--p-muted)}.act-lib__placeholder{overflow:hidden;font-size:15px;text-overflow:ellipsis;white-space:nowrap}.act-lib__pill{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:var(--radius-pill);background-color:var(--p-card);box-shadow:inset 0 0 0 1px var(--p-border);color:var(--p-secondary);font-size:12px;font-weight:500;white-space:nowrap}.act-lib__pill svg{opacity:.6}.act-lib__pill--compact{display:none}.act-lib__cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none}.act-card{display:flex;flex-direction:column;gap:10px;min-width:0;padding:12px;border-radius:var(--radius-lg);background-color:var(--p-card);box-shadow:inset 0 0 0 1px var(--p-border)}.act-card__top{display:flex;align-items:center;gap:10px;min-width:0}.act-card__glyph{display:inline-flex;flex:none;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-md);background-color:color-mix(in srgb,var(--p-hue) 22%,var(--p-card));color:color-mix(in srgb,var(--p-hue) 65%,var(--p-text));font-size:16px;font-weight:600;line-height:1}.act-card__sign{transform:translateY(-.09em)}.act-card__sign--x{transform:translateY(-.11em)}.act-card__heading{display:flex;flex:1;flex-direction:column;min-width:0}.act-card__title,.act-card__meta{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.act-card__title{font-size:12px;font-weight:600;line-height:1.4}.act-card__meta{color:var(--p-muted);font-size:11px;line-height:1.4;text-transform:capitalize}.act-card__statement{display:-webkit-box;min-height:2.7em;overflow:hidden;font-size:14px;line-height:1.35;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2}.act-card__actions{display:flex;align-items:center;gap:6px}.act-card__play,.act-card__assign{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-md)}.act-card__play{background-color:var(--p-primary);color:var(--color-white)}.act-card__assign{color:var(--p-muted)}.act-math{display:inline-block;font-family:var(--font-math);font-size:1.21em;font-weight:400;line-height:1.1;letter-spacing:0;white-space:nowrap}.act-math__x{font-family:var(--font-math-italic);font-style:italic}.act-math__bin{margin-inline:.2222em}.act-math__rel{margin-inline:.2778em}@media(max-width:767.98px){.act-lib{gap:14px;padding:16px}.act-lib__title{font-size:17px}.act-lib__pill--wide{display:none}.act-lib__pill--compact{display:inline-flex}.act-lib__cards{grid-template-columns:minmax(0,1fr)}.act-card+.act-card{display:none}}@media(max-width:420px){.act-lib__new{padding:0 12px}.act-lib__placeholder{font-size:14px}}@property --t-hero{syntax: "<number>"; inherits: true; initial-value: 0;}@property --cam-tx{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --cam-ty{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --cam-z{syntax: "<number>"; inherits: false; initial-value: 1;}@property --cursor-k{syntax: "<number>"; inherits: false; initial-value: 1;}.session-board{--t: max(var(--t-hero, 0), var(--t-scroll, 0));display:block;max-width:none;overflow:visible;pointer-events:none;user-select:none;-webkit-user-select:none}.session-board:not([data-plane]){width:100%;height:100%}.session-board[data-hero]{--t-hero: 7000}html[data-motion=full] .session-board[data-hero]{animation:board-hero-write 2s linear .3s both}@keyframes board-hero-write{0%{--t-hero: 1200}to{--t-hero: 7000}}.board-paper-fill{fill:var(--color-whiteboard-bg)}.board-dot{fill:var(--color-board-dot)}.board-paper-thumb-fill{fill:var(--color-white)}.board-grid-line{fill:color-mix(in srgb,var(--color-neutral-900) 6%,transparent)}.session-board[data-paper=both] .board-paper--board{opacity:1}.session-board[data-paper=both] .board-paper--thumb{opacity:var(--paper-thumb, 0)}.board-card-rect{fill:var(--color-white);filter:drop-shadow(0 3px 4px color-mix(in srgb,var(--color-neutral-1000) 8%,transparent)) drop-shadow(0 1px 2px color-mix(in srgb,var(--color-neutral-1000) 6%,transparent))}.board-math,.board-chip-text{text-rendering:geometricPrecision}.board-math{font-family:var(--font-math);font-style:normal;fill:var(--color-neutral-900)}.board-math-it{font-family:var(--font-math-italic);font-style:italic}.board-chip-rect{fill:var(--color-white);stroke:var(--color-border-subtle);filter:drop-shadow(0 calc(var(--chip-s, 1) * 1px) calc(var(--chip-s, 1) * 2px) color-mix(in srgb,var(--color-neutral-1000) 6%,transparent))}.board-chip-text{fill:var(--color-neutral-900);font-family:inherit;font-weight:400}.board-statement{opacity:var(--statement-o, 1)}.session-board[data-statement=both] .board-statement--card{opacity:calc(var(--statement-o, 1) * clamp(0,1 - 2 * var(--statement-chip, 0),1))}.session-board[data-statement=both] .board-statement--chip{opacity:calc(var(--statement-o, 1) * clamp(0,2 * var(--statement-chip, 0) - 1,1))}.board-hl{fill:var(--color-tutor-highlight);opacity:calc(.45*clamp(0,(var(--t) - var(--hf)) / 300,1)*clamp(0,(var(--ht) - var(--t)) / 300,1))}.board-stroke{fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1 1;stroke-dashoffset:calc(1 - clamp(0,(var(--t) - var(--s)) / var(--d),1));opacity:calc(clamp(0,var(--t) - var(--s),1)*clamp(0,(var(--x, 1000000000) - var(--t)) / 100,1))}.board-stroke[data-tone=student]{stroke:var(--color-ink-student)}.board-stroke[data-tone=tutor]{stroke:var(--color-ink-tutor)}.board-stroke[data-tone=underline]{stroke:var(--color-tutor-underline);filter:drop-shadow(var(--shadow-underline))}.tutor-cursor{visibility:hidden}.tutor-cursor__sprite{transform:scale(calc(var(--cursor-k, 1) * 44 / 70))}.tutor-cursor__shapes{filter:drop-shadow(0 6.4px 12.7px color-mix(in srgb,var(--color-neutral-1000) 25%,transparent))}.tutor-cursor__shape{fill:var(--color-neutral-1000);stroke:var(--color-white);stroke-width:4;stroke-linejoin:round;stroke-linecap:round;paint-order:stroke}.tutor-cursor__ring{fill:none;stroke:var(--color-accent);stroke-width:3;opacity:0}.board-window{position:absolute;inset:0;overflow:clip;container-type:size;transform-origin:0 0;transform:translate(var(--win-x, 0px),var(--win-y, 0px)) scale(var(--win-s, 1));clip-path:var(--win-clip, none)}.board-window__probe{position:absolute;top:0;left:0;width:0;height:var(--caption-band-h, 0px);visibility:hidden;pointer-events:none}.board-window>.session-board{position:absolute;top:0;left:0}.session-board[data-plane]{transform-origin:0 0;transform:translate(var(--cam-tx, 0px),var(--cam-ty, 0px)) scale(var(--cam-z, 1))}.scroll-stage[data-active] .board-window,.scroll-stage[data-active] .session-board[data-plane]{will-change:transform}@media(max-width:1023.98px),(max-height:599.98px){.session-board[data-rest-stacked]{transform-origin:50% 0;transform:translateY(calc(var(--rest-dy, 0) * 100cqw)) scale(var(--rest-k, 1))}}.closing{--closing-card-max-h: calc(100svh - var(--header-h) - 32px);display:grid;align-items:center;min-height:clamp(520px,76svh,720px);padding-block:64px}.closing__grid{display:grid;gap:56px}.closing__copy{display:grid;align-content:center;gap:24px;container-type:inline-size}.closing__stat{color:var(--story-muted);font-size:17px;font-weight:600;line-height:1.3;letter-spacing:.005em}.closing .closing__title{font-size:min(var(--text-display),8.1cqi)}.closing__line{display:block}.closing .closing__swipe{--swipe-gradient: linear-gradient( 90deg, var(--color-lavender-900) 0 33.33%, var(--color-lavender-500) 50%, var(--story-muted) 66.67% 100% );--swipe-duration: 3.5s;color:var(--color-lavender-900)}.closing__sub{max-width:34ch}.closing__ctas{margin-top:8px}.closing__card{position:relative;width:100%;max-width:calc(var(--closing-card-max-h) * 4 / 5);max-height:var(--closing-card-max-h);aspect-ratio:4 / 5;overflow:clip;border-radius:var(--radius-board-card);background-color:var(--color-whiteboard-bg);box-shadow:0 0 0 1px var(--frame-hairline),var(--frame-shadow)}.closing__board{position:absolute;inset:0}@media(max-width:1023.98px){.closing__grid{gap:48px}.closing .closing__title{font-size:var(--text-display)}.closing__card{max-width:min(384px,calc(min(48svh,480px,var(--closing-card-max-h))*.8))}.closing__board>.session-board{position:absolute;left:var(--crop-x);top:var(--crop-y);width:var(--crop-w);height:var(--crop-h)}}@media(max-width:767.98px){.closing{min-height:0;padding-block:48px}.closing__grid{gap:32px}.closing__card{max-width:calc(min(44svh,420px,var(--closing-card-max-h))*.8)}}@media(max-height:520px)and (min-width:600px)and (max-width:1023.98px){.closing{min-height:calc(100svh - var(--header-h));padding-block:16px}.closing__grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:center;gap:32px}.closing__copy{gap:16px}.closing .closing__title{font-size:min(var(--text-display),8.1cqi)}.closing__card{justify-self:end;max-width:calc(var(--closing-card-max-h) * 4 / 5)}}@media(min-width:1024px){.closing{--closing-card-h: min( calc(100svh - 300px) , 560px);padding-block:clamp(48px,5vw,72px)}.closing__grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:center;gap:clamp(48px,5vw,96px)}.closing__card{justify-self:end;width:min(100%,calc(var(--closing-card-h) * 4 / 5));max-width:none}}@media(max-width:360px){.closing{padding-block:40px}.closing__copy{gap:16px}.closing__grid{gap:24px}.closing__sub{font-size:16px}.closing__card{max-width:calc(min(40svh,var(--closing-card-max-h))*.8)}}.faq[data-astro-cid-badip6tp]{padding-block:clamp(56px,5vw,72px)}.faq-grid[data-astro-cid-badip6tp]{display:grid;gap:32px}@media(min-width:1024px){.faq-grid[data-astro-cid-badip6tp]{grid-template-columns:repeat(12,minmax(0,1fr));column-gap:24px;align-items:start}.faq-head[data-astro-cid-badip6tp]{grid-column:1 / span 4}.faq-list[data-astro-cid-badip6tp]{grid-column:5 / span 8}}.faq-list[data-astro-cid-badip6tp]{box-shadow:inset 0 1px 0 var(--story-hairline)}.faq-item[data-astro-cid-badip6tp]{box-shadow:inset 0 -1px 0 var(--story-hairline)}.faq-q[data-astro-cid-badip6tp]{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:20px;font-size:clamp(18px,calc(.4vw + 16.5px),21px);font-weight:600;line-height:1.3;letter-spacing:-.01em;cursor:pointer;list-style:none;border-radius:4px}.faq-q[data-astro-cid-badip6tp]::-webkit-details-marker{display:none}.faq-q[data-astro-cid-badip6tp]:hover .faq-icon[data-astro-cid-badip6tp]{color:var(--story-fg)}.faq-icon[data-astro-cid-badip6tp]{flex:none;color:var(--story-muted);fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;transition:transform var(--duration-normal) var(--ease-default),color var(--duration-fast) var(--ease-default)}.faq-icon__v[data-astro-cid-badip6tp]{transform-origin:12px 12px;transition:transform var(--duration-normal) var(--ease-default)}.faq-item[data-astro-cid-badip6tp][open] .faq-icon[data-astro-cid-badip6tp]{transform:rotate(180deg)}.faq-item[data-astro-cid-badip6tp][open] .faq-icon__v[data-astro-cid-badip6tp]{transform:scaleY(0)}.faq-a[data-astro-cid-badip6tp]{max-width:720px;padding:0 44px 28px 0;color:var(--story-muted);font-size:var(--text-body);line-height:var(--text-body--line-height)}@media(max-width:767.98px){.faq-a[data-astro-cid-badip6tp]{padding-right:0;font-size:16px}}@media(max-width:360px){.faq-q[data-astro-cid-badip6tp]{padding-block:16px;font-size:17px}}.hero-copy[data-astro-cid-wji7xwcf]{--hero-copy-top: calc(var(--header-h) + 56px);display:flex;flex-direction:column;align-items:center;width:min(100% - 2 * var(--gutter),1100px);margin-inline:auto;padding-top:var(--hero-copy-top);text-align:center;scroll-margin-top:var(--hero-copy-top)}.hero-copy__title[data-astro-cid-wji7xwcf]{margin-top:14px;text-wrap:balance}.hero-copy__lede[data-astro-cid-wji7xwcf]{max-width:34em;margin-top:18px}.hero-copy__ctas[data-astro-cid-wji7xwcf]{justify-content:center;margin-top:26px}@media(max-width:767.98px){.hero-copy[data-astro-cid-wji7xwcf]{--hero-copy-top: calc(var(--header-h) + 24px)}.hero-copy__title[data-astro-cid-wji7xwcf]{margin-top:10px}.hero-copy__lede[data-astro-cid-wji7xwcf]{margin-top:14px}.hero-copy__ctas[data-astro-cid-wji7xwcf]{gap:12px 24px;margin-top:20px}}@media(min-width:1024px)and (max-height:820px){.hero-copy[data-astro-cid-wji7xwcf]{--hero-copy-top: calc(var(--header-h) + 36px)}.hero-copy__title[data-astro-cid-wji7xwcf]{margin-top:10px}.hero-copy__lede[data-astro-cid-wji7xwcf]{margin-top:12px}.hero-copy__ctas[data-astro-cid-wji7xwcf]{margin-top:18px}}html[data-motion=full] .hero-copy[data-astro-cid-wji7xwcf]{position:absolute;top:0;right:0;left:0;z-index:4;pointer-events:none}html[data-motion=full] .hero-copy[data-astro-cid-wji7xwcf]>[data-astro-cid-wji7xwcf]{pointer-events:auto}.hinge-title[data-astro-cid-fhissphn]{max-width:1100px}@supports (animation-timeline: view()){html[data-motion=full] .hinge[data-astro-cid-fhissphn]{view-timeline:--fill block}html[data-motion=full] .hinge[data-astro-cid-fhissphn] .wf-w{animation-range:cover calc(40lvh + var(--i) / var(--n) * 70lvh) cover calc(46lvh + var(--i) / var(--n) * 70lvh)}}html:not([data-motion=full]) .hinge[data-astro-cid-fhissphn]{min-height:min(100lvh,max(420px,60svh));padding-block:calc(var(--header-h) + 24px) 24px}@property --nb-t{syntax: "<number>"; inherits: true; initial-value: 0;}@property --nb-wave{syntax: "<number>"; inherits: true; initial-value: 0;}@property --nb-play{syntax: "<number>"; inherits: false; initial-value: 0;}.nb{--nb-pad-x: 20px;--nb-head-h: 68px;--nb-margin-x: 24px;--nb-problem-x: 40px;--nb-controls-h: 68px;--nb-rule: color-mix(in srgb, var(--color-notebook-line) 72%, transparent);--nb-ring: color-mix(in srgb, var(--color-notebook-accent) 18%, transparent);position:relative;display:flex;flex-direction:column;height:100%;overflow:clip;padding:0 var(--nb-pad-x);border-radius:var(--radius-xl);background-color:var(--color-notebook-canvas);box-shadow:0 0 0 1px var(--frame-hairline, var(--color-frame-hairline-paper)),var(--frame-shadow, var(--shadow-product-lg));color:var(--color-notebook-ink);font-family:var(--font-sans);font-size:16px;line-height:normal;font-synthesis:none;pointer-events:none;user-select:none;-webkit-user-select:none}.nb *,.nb *:before,.nb *:after{box-sizing:border-box}.nb-icon{width:20px;height:20px;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.nb-lucide{flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.nb-icon-btn{display:inline-flex;width:44px;height:44px;flex:0 0 auto;align-items:center;justify-content:center;border-radius:13px;color:var(--color-notebook-ink)}.nb-head{position:relative;display:flex;height:var(--nb-head-h);flex:none;align-items:center;gap:8px}.nb-titles{display:grid;min-width:0;flex:1;align-items:center}.nb-titles>*{grid-area:1 / 1;min-width:0;transition:opacity var(--duration-slower) var(--ease-dock)}.nb-title{overflow:hidden;font-size:16px;font-weight:600;letter-spacing:-.5px;text-overflow:ellipsis;white-space:nowrap}.nb-replay-title{display:flex;flex-direction:column;gap:4px}.nb-student{color:var(--color-notebook-muted);font-size:12px}.nb[data-phase=replay] [data-head=record],.nb:not([data-phase=replay]) [data-head=replay]{opacity:0}.nb-finish{position:absolute;top:50%;right:0;margin-top:-20px;display:inline-flex;min-height:40px;flex:none;align-items:center;padding:9px 14px;border-radius:var(--radius-lg);background-color:var(--color-neutral-950);color:var(--color-white);font-size:14px;font-weight:500;white-space:nowrap;transition:opacity var(--duration-normal) var(--ease-default)}.nb[data-phase=replay] .nb-finish{opacity:0}.nb-sheet{--nb-pitch: calc(100cqw * 42.5 / 1588);position:relative;display:flex;min-height:0;flex:1;flex-direction:column;overflow:hidden;border:1px solid var(--color-notebook-line);border-bottom:0;border-radius:5px 5px 0 0;background-color:var(--color-notebook-paper);container-type:inline-size;clip-path:inset(0 0 0 0);transition:clip-path var(--duration-slower) var(--ease-dock)}.nb[data-phase=replay] .nb-sheet{clip-path:inset(0 0 var(--nb-controls-h) 0)}.nb-sheet:before{position:absolute;z-index:1;top:0;bottom:0;left:var(--nb-margin-x);width:1px;background-color:color-mix(in srgb,var(--color-notebook-record) 19%,transparent);content:""}.nb-problem{display:grid;flex:none;gap:8px;padding:24px var(--nb-problem-x) 14px}.nb-question{color:var(--color-notebook-muted);font-size:12px;font-weight:500}.nb-statement{max-width:46em;margin:0;font-size:clamp(16px,.5vw + 10px,18px);font-weight:500;line-height:1.55;letter-spacing:-.3px;text-wrap:pretty}.nb-plane{position:relative;width:100%;flex:none;aspect-ratio:1588 / 680}.nb-plane>:is(svg,img){position:absolute;inset:0;display:block;width:100%;max-width:none;height:100%;overflow:visible}.nb-paper{min-height:0;flex:1;background-image:repeating-linear-gradient(to bottom,var(--nb-rule) 0 1px,transparent 1px var(--nb-pitch))}.nb-rules{fill:none;stroke:var(--color-notebook-line);stroke-opacity:.72;stroke-width:1}.nb-stroke{fill:none;stroke:var(--color-notebook-ink);stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1 1;stroke-dashoffset:calc(1 - clamp(0,(var(--nb-t) - var(--s)) / var(--d),1));opacity:clamp(0,var(--nb-t) - var(--s),1)}.nb-late{transition:opacity var(--duration-slow) var(--ease-default)}.nb[data-phase=replay] .nb-late{opacity:0}.nb:not([data-phase=replay]) [data-ink=replay]{visibility:hidden}.nb-dock{position:absolute;z-index:2;right:0;bottom:14px;left:0;display:flex;width:max-content;max-width:calc(100% - 24px);align-items:center;gap:12px;margin-inline:auto;padding:6px 12px 6px 6px;border:1px solid var(--color-notebook-line);border-radius:var(--radius-lg);background-color:var(--color-notebook-paper);box-shadow:var(--shadow-md);transition:opacity var(--duration-normal) var(--ease-default)}.nb[data-phase=replay] .nb-dock{opacity:0}.nb-tools{display:flex;flex-shrink:0;align-items:center;gap:2px;padding-right:12px;border-right:1px solid var(--color-notebook-line)}.nb-tool{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border-radius:7px;color:var(--color-notebook-muted)}.nb-tool[data-active]{background-color:var(--color-notebook-canvas);box-shadow:inset 0 0 0 1px var(--color-notebook-line);color:var(--color-notebook-ink)}.nb-tool-divider{width:1px;height:20px;margin:0 4px;background-color:var(--color-notebook-line)}.nb-voice{display:flex;align-items:center;gap:12px}.nb-record{position:relative;isolation:isolate;display:flex;min-height:40px;align-items:center;gap:10px;padding:10px 14px;border-radius:7px;background-color:var(--color-notebook-ink);color:var(--color-notebook-paper);font-size:13px;font-weight:600;white-space:nowrap}.nb-record:before{position:absolute;z-index:-1;inset:0;border-radius:inherit;background-color:var(--color-notebook-record);content:"";opacity:0;transition:opacity var(--duration-slow) var(--ease-default)}.nb[data-phase=recording] .nb-record:before{opacity:1}:is(.nb-record,.nb-finish):after{position:absolute;inset:-3px;border-radius:10px;box-shadow:0 0 0 2px var(--color-notebook-accent);content:"";opacity:0}.nb-finish:after{border-radius:15px}.nb[data-stop-pressed] .nb-record,.nb[data-finish-pressed] .nb-finish{animation:nb-press var(--duration-slow) var(--ease-default)}.nb[data-stop-pressed] .nb-record:after,.nb[data-finish-pressed] .nb-finish:after{animation:nb-ring var(--duration-slow) var(--ease-out)}@keyframes nb-press{50%{transform:scale(.96)}}@keyframes nb-ring{0%{opacity:1}to{opacity:0}}.nb-record-icons,.nb-record-labels{display:grid}.nb-record-icons>*,.nb-record-labels>*{grid-area:1 / 1}.nb-record-labels{justify-items:start}.nb[data-phase=recording] .nb-when-mic,.nb:not([data-phase=recording]) .nb-when-stop,.nb:not([data-phase=idle]) [data-label=record],.nb:not([data-phase=recording]) [data-label=stop],.nb:is([data-phase=idle],[data-phase=recording]) [data-label=again]{visibility:hidden}.nb-meter{display:flex;align-items:center;gap:14px}.nb-wave{display:flex;height:30px;align-items:center;justify-content:center;gap:3px;color:var(--color-notebook-accent);opacity:.6}.nb-wave>span{width:3px;border-radius:8px;background-color:currentColor;opacity:.35;transform-origin:center}.nb[data-phase=recording] .nb-wave>span{opacity:1;transform:scaleY(clamp(var(--min),(.6 + .4 * sin(var(--nb-wave) * var(--rate) + var(--phase))) * (.8 + .2 * sin(var(--nb-wave) * .9 + 2 * var(--phase))),1))}.nb[data-static] .nb-wave>span{transform:none}.nb-timer{min-width:38px;font-size:17px;font-variant-numeric:tabular-nums;font-weight:500}.nb-limit{color:var(--color-notebook-muted);font-size:10px;white-space:nowrap}.nb-controls{position:absolute;z-index:2;right:var(--nb-pad-x);bottom:0;left:var(--nb-pad-x);display:flex;height:var(--nb-controls-h);align-items:center;gap:12px;opacity:0;transform:translateY(12px);transition:opacity var(--duration-slower) var(--ease-dock),transform var(--duration-slower) var(--ease-dock)}.nb[data-phase=replay] .nb-controls{opacity:1;transform:none}.nb-controls>.nb-icon-btn{margin-inline:-4px}.nb:not([data-playing]) .nb-when-playing,.nb[data-playing] .nb-when-paused{display:none}.nb-timeline{position:relative;min-width:0;height:24px;flex:1}.nb-track{position:absolute;top:10px;right:0;left:0;height:4px;overflow:hidden;border-radius:4px;background-color:var(--color-notebook-line)}.nb-track-cap,.nb-track-fill{position:absolute;top:0;bottom:0;background-color:var(--color-notebook-accent)}.nb-track-cap{left:0;width:9px}.nb-track-fill{right:8px;left:8px;transform:scaleX(var(--nb-play));transform-origin:left}.nb-voice-track,.nb-playhead-track{position:absolute;top:0;right:8px;left:8px;height:24px}.nb-voice-span{position:absolute;top:9px;height:6px;border-radius:3px;background-color:color-mix(in srgb,var(--color-notebook-accent) 45%,var(--color-notebook-paper))}.nb[data-voice=active] .nb-voice-span{background-color:var(--color-notebook-accent);box-shadow:0 0 0 3px var(--nb-ring)}.nb-marker{position:absolute;top:-9px;display:flex;width:24px;height:24px;align-items:center;justify-content:center;border-radius:50%;background-color:var(--color-notebook-paper);color:var(--color-notebook-accent)}.nb-marker--start{left:-12px}.nb-marker--end{right:-12px}.nb[data-voice=active] .nb-marker--start{background-color:var(--color-notebook-accent);box-shadow:0 0 0 3px var(--nb-ring);color:var(--color-notebook-paper)}.nb-playhead-track{container-type:inline-size}.nb-playhead{position:absolute;top:-2px;left:0;width:3px;height:28px;border-radius:1px;background-color:var(--color-notebook-ink);box-shadow:0 0 0 1px var(--color-notebook-paper);transform:translate(calc(var(--nb-play) * 100cqw - 50%))}.nb-time{font-size:12px;font-variant-numeric:tabular-nums;white-space:nowrap}.nb-speed{display:inline-flex;min-height:44px;align-items:center;padding:0 8px;border-radius:var(--radius-md);background-color:var(--color-notebook-paper);font-size:13px}@media(max-width:1023.98px),(max-height:599.98px){.nb{--nb-pad-x: 10px;--nb-head-h: 56px;--nb-margin-x: 14px;--nb-problem-x: 26px}.nb-problem{padding-top:18px;padding-bottom:12px}.nb-statement{font-size:15px}}@media(max-width:1100px){.nb-wave,.nb-limit{display:none}}@media(max-width:700px){.nb-dock{bottom:12px;width:min(320px,100% - 24px);flex-direction:column;align-items:stretch;gap:8px;padding:8px}.nb-tools{justify-content:center;padding:0 0 8px;border-right:0;border-bottom:1px solid var(--color-notebook-line)}.nb-voice{justify-content:space-between}.nb-record{gap:7px}.nb-timer{font-size:18px}}@media(max-width:600px){.nb{--nb-controls-h: 96px}.nb-controls{flex-wrap:wrap;align-content:center;gap:4px}.nb-timeline{flex-basis:100%;order:-1}.nb-time{margin-right:auto}}@media(max-width:360px){.nb-tools{display:none}.nb{--nb-controls-h: 88px}.nb-problem{gap:6px;padding-top:14px;padding-bottom:8px}.nb-statement{font-size:14px;line-height:1.45}.nb-finish{min-height:36px;margin-top:-18px;padding:7px 12px}}html[data-motion=full] #think-aloud{scroll-margin-top:0}.al-screen{position:absolute;inset:0}.al-screen[data-snap] *{transition:none!important;animation-duration:0s!important}#think-aloud[data-active] :is(.nb-track-fill,.nb-playhead,.nb-wave>span){will-change:transform}.al-beat{align-self:center}.al-beat>[data-beat]{display:grid;gap:inherit}.al-caption .beat-title{font-size:min(var(--text-chapter),calc(min(460px,34vw - var(--gutter)) / 8.4))}.al-line{display:block}.al-short{display:none}@media(max-width:360px){.al-long{display:none}.al-short{display:inline}}.al-zone{position:absolute;inset:6% 4% 6% 36%}@media(max-width:1023.98px),(max-height:599.98px){.al-zone{inset:calc(var(--caption-band-h) + 12px) 16px calc(100lvh - 100svh + 16px)}.al-screen>.al-caption{justify-content:flex-end;padding-bottom:0;clip-path:inset(-100vh -100vw 0 -100vw)}.al-beat{align-self:end}.al-caption .beat-title{font-size:clamp(28px,calc(2.6vw + 20px),40px)}}.al-figure-copy .t-chapter{text-wrap:wrap}.al-shot{--al-shot-h: clamp(420px, 60vh, 640px);width:min(100%,calc((var(--al-shot-h) - 290px) * 2.675 + 42px));height:var(--al-shot-h)}@property --room-o{syntax: "<number>"; inherits: false; initial-value: 1;}@property --room-y{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --room-s{syntax: "<number>"; inherits: false; initial-value: 1;}@property --room-bar{syntax: "<number>"; inherits: false; initial-value: 1;}@property --room-heads{syntax: "<number>"; inherits: false; initial-value: 1;}@property --room-cards{syntax: "<number>"; inherits: false; initial-value: 1;}@property --mate-t{syntax: "<number>"; inherits: false; initial-value: 1;}@property --nora-chrome{syntax: "<number>"; inherits: false; initial-value: 1;}@property --report-o{syntax: "<number>"; inherits: false; initial-value: 1;}@property --report-y{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --report-parts{syntax: "<number>"; inherits: false; initial-value: 1;}@property --part-t{syntax: "<number>"; inherits: false; initial-value: 1;}.tr-shot{position:relative;width:100%;height:100%;pointer-events:none;user-select:none;text-align:left}.tr-shot-mask{position:absolute;inset:-64px;padding:64px}.tr-room .tr-shot-mask{-webkit-mask-image:linear-gradient(to bottom,black calc(100% - 64px - var(--frame-fade, 80px)),transparent calc(100% - 64px));mask-image:linear-gradient(to bottom,black calc(100% - 64px - var(--frame-fade, 80px)),transparent calc(100% - 64px))}.tr-frame{position:relative;display:flex;flex-direction:column;width:100%;height:100%;overflow:clip;border-radius:20px;box-shadow:0 0 0 1px var(--frame-hairline, transparent),var(--frame-shadow, var(--shadow-product-lg));background:var(--color-white);font-family:var(--font-sans);font-size:12px;line-height:1.33;font-weight:400;letter-spacing:0;color:var(--color-neutral-900);container:trframe / inline-size}.tr-room{opacity:var(--room-o);transform:translateY(var(--room-y)) scale(var(--room-s))}.tr-report{opacity:var(--report-o);transform:translateY(var(--report-y)) scale(var(--report-s, 1))}.tr-report .tr-frame{background:var(--color-cream-muted)}.tr-pill{display:inline-flex;flex:none;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;font-size:12px;line-height:1;font-weight:600;white-space:nowrap}.tr-pill-dot{width:6px;height:6px;flex:none;border-radius:50%}.tr-pill[data-tone=good]{background:var(--color-status-success-bg);color:var(--color-status-success-fg)}.tr-pill[data-tone=good] .tr-pill-dot{background:var(--color-product-success)}.tr-pill[data-tone=warn]{background:var(--color-status-warning-bg);color:var(--color-status-warning-fg)}.tr-pill[data-tone=warn] .tr-pill-dot{background:var(--color-warning-warm)}.tr-pill[data-tone=muted]{background:var(--color-cream-muted);color:var(--color-neutral-600)}.tr-pill[data-tone=muted] .tr-pill-dot{background:var(--color-neutral-600)}.tr-pill[data-tone=bad]{background:color-mix(in srgb,var(--color-product-error) 10%,transparent);color:var(--color-product-error)}.tr-pill[data-tone=bad] .tr-pill-dot{background:var(--color-product-error)}.tr-live{display:inline-flex;flex:none;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;background:color-mix(in srgb,var(--color-product-error) 10%,transparent);color:var(--color-product-error);font-size:12px;line-height:1;font-weight:600}.tr-live-pulse{position:relative;display:flex;width:8px;height:8px;flex:none}.tr-live-wave,.tr-live-dot{position:absolute;inset:0;border-radius:50%;background:var(--color-product-error)}.tr-live-wave{opacity:.5}html[data-motion=full] .scroll-stage[data-active] .tb-screen[data-room=on] .tr-room[data-layer=base] .tr-live-wave{animation:tr-ping 1s cubic-bezier(0,0,.2,1) infinite;will-change:transform,opacity}@keyframes tr-ping{75%,to{transform:scale(2);opacity:0}}.tr-badge{display:inline-flex;flex:none;align-items:center;justify-content:center;white-space:nowrap}.tr-badge[data-size=md]{gap:4px;height:24px;padding:0 8px;border-radius:8px;font-size:12px;line-height:1.33}.tr-badge[data-size=sm]{min-width:16px;height:16px;padding:0 4px;border-radius:999px;font-size:11px;line-height:1;font-weight:500}.tr-badge[data-variant=success]{background:var(--color-status-success-bg);color:var(--color-status-success-fg)}.tr-badge[data-variant=warning]{background:var(--color-status-warning-bg);color:var(--color-status-warning-fg)}.tr-badge[data-variant=default]{background:var(--color-status-neutral-bg);color:var(--color-status-neutral-fg)}.tr-tier{display:inline-flex;flex:none;gap:2px}.tr-tier-dot{width:6px;height:6px;border-radius:50%;background:var(--color-neutral-200)}.tr-tier-dot[data-on=true]{background:var(--color-accent)}.tr-dashes{display:flex;flex-shrink:1;align-items:center;gap:4px;min-width:0}.tr-dash{width:16px;min-width:4px;height:6px;flex-shrink:1;border-radius:999px;background:var(--color-neutral-200)}.tr-dash[data-on=true]{background:var(--color-neutral-900)}.tr-section-label{display:block;font-size:12px;line-height:16px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--color-neutral-600)}.tr-avatar{display:flex;flex:none;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--color-cream-muted);font-size:12px;line-height:1;font-weight:600;color:var(--color-neutral-900)}.tr-avatar[data-size="34"]{width:34px;height:34px}.tr-bar,.tr-rhead{position:relative;display:flex;flex:none;align-items:center;gap:8px;min-height:64px;padding:10px 20px;border-bottom:1px solid var(--color-neutral-200);background:var(--color-white)}.tr-bar{opacity:var(--room-bar)}.tr-bar-back{display:inline-flex;flex:none;align-items:center;gap:6px;padding:4px 6px;border-radius:8px;font-size:12px;line-height:1.33;font-weight:500;color:var(--color-neutral-700)}.tr-bar-back-word{display:none}.tr-divider{width:1px;height:24px;flex:none;background:var(--color-neutral-200)}.tr-bar-text{display:flex;flex:1 1 0;flex-direction:column;min-width:0}.tr-bar-title,.tr-bar-sub{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.tr-bar-title{font-size:16px;line-height:1.5;font-weight:600}.tr-bar-sub{font-size:12px;line-height:1.45;color:var(--color-neutral-600)}.tr-muted{font-weight:400;color:var(--color-neutral-600)}.tr-rhead-outcome{display:none;flex:none}.tr-replay-btn{display:none;flex:none;align-items:center;height:32px;padding:0 12px;border:1px solid var(--color-neutral-200);border-radius:14px;font-size:12px;line-height:1;font-weight:600;color:var(--color-neutral-700);white-space:nowrap}.tr-seg{display:inline-flex;flex:none;align-items:center;padding:2px;border-radius:999px;background:var(--color-cream-muted)}.tr-seg-item{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;font-size:12px;line-height:1;font-weight:600;color:var(--color-neutral-700);white-space:nowrap}.tr-seg-item[data-active=true]{background:var(--color-white);color:var(--color-neutral-900);box-shadow:var(--shadow-product-sm)}@container trframe (max-width: 479.98px){.tr-rhead .tr-seg{display:none}}@container trframe (min-width: 480px){.tr-rhead-outcome{display:inline-flex}}@container trframe (min-width: 640px){.tr-bar,.tr-rhead{gap:16px}.tr-bar-back-word{display:inline}}@container trframe (min-width: 1000px){.tr-replay-btn{display:inline-flex}}.tr-zoom{--room-zoom: .66;position:relative;display:flex;flex:none;flex-direction:column;width:calc(100% / var(--room-zoom));height:calc(100% / var(--room-zoom));transform:scale(var(--room-zoom));transform-origin:0 0}.tr-room-body{position:relative;flex:1 1 0;min-height:0;overflow:clip;padding:16px}.tr-room-grid{--cols: 2;--need-span: 1;--work-span: 1;display:grid;grid-template-columns:repeat(var(--cols),minmax(0,1fr));gap:12px}@container trframe (min-width: 600px){.tr-zoom{--room-zoom: .72}.tr-room-grid{--cols: 12;--need-span: 4;--work-span: 3}}.tr-group-head{grid-column:1 / -1;display:flex;align-items:baseline;gap:8px;padding-top:4px;font-size:14px;line-height:1.43;font-weight:700;opacity:var(--room-heads)}.tr-group-count{font-weight:400;color:var(--color-neutral-600)}.tr-card{position:relative;display:flex;flex-direction:column;grid-column:span var(--work-span);min-width:0;overflow:hidden;border:1px solid var(--color-neutral-200);border-radius:16px;background:var(--color-white)}.tr-thumb{position:relative;width:100%;aspect-ratio:16 / 10;overflow:hidden;border-bottom:1px solid var(--color-neutral-200);background:var(--color-white)}.tr-paper{background-image:linear-gradient(color-mix(in srgb,var(--color-neutral-900) 6%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--color-neutral-900) 6%,transparent) 1px,transparent 1px);background-size:14px 14px}.tr-chip{margin:12px 12px 0;overflow:hidden;padding:6px 10px;border:1px solid var(--color-neutral-200);border-radius:14px;background:var(--color-white);box-shadow:var(--shadow-product-sm);font-size:12px;line-height:1.45;white-space:nowrap;text-overflow:ellipsis}.tr-thumb-ink{position:absolute;top:54px;left:12px;width:calc(100% - 24px);height:calc(100% - 64px);max-width:none;overflow:visible}.tr-thumb-ink path{fill:none;stroke:var(--color-ink-student);stroke-linecap:round;stroke-linejoin:round}.tr-thumb-pill{position:absolute;right:10px;bottom:10px;z-index:2}.tr-meta{display:flex;align-items:center;gap:10px;padding:10px 12px}.tr-who{display:flex;flex:1 1 80px;flex-direction:column;min-width:0}.tr-name,.tr-sub{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.tr-name{font-size:12px;line-height:1.33;font-weight:600}.tr-sub{font-size:12px;line-height:1.45;color:var(--color-neutral-600)}.tr-mate{--mate-t: clamp(0, (var(--room-cards) - var(--i, 0) * .045) / .34, 1);opacity:var(--mate-t);transform:translateY(calc((1 - var(--mate-t)) * 16px))}.tr-card--need{grid-column:span var(--need-span);overflow:visible;padding:1px;border:0;background:transparent}.tr-need-main{position:relative}.tr-need-bg{position:absolute;inset:0;pointer-events:none}.tr-need-main>.tr-need-bg{inset:-1px -1px 0}.tr-need-bg-full,.tr-need-bg-short{position:absolute;inset:0;border:1px solid var(--color-warning-warm);border-radius:16px;background:var(--color-white)}.tr-card--need[data-need=false] :is(.tr-need-bg-full,.tr-need-bg-short){border-color:var(--color-neutral-200)}.tr-need-bg-short,.tr-room[data-reason=off] .tr-need-bg-full{opacity:0}.tr-room[data-reason=off] .tr-need-bg-short{opacity:1}html[data-motion=full] :is(.tr-need-bg-full,.tr-need-bg-short){transition:opacity var(--duration-ui) var(--ease-default)}.tr-card--need .tr-thumb{border-radius:15px 15px 0 0}.tr-card--need :is(.tr-meta,.tr-reason){position:relative}.tr-card--nora{z-index:2}.tr-nora-bg{opacity:var(--nora-chrome)}.tr-slot{border-bottom:0;background:transparent}.tr-room[data-chrome=off] :is(.tr-nora-bg,.tr-nora-chrome,.tr-nora-pill){--nora-chrome: 0}.tr-slot>:not(.tr-thumb-pill){position:absolute;inset:0;width:100%;height:100%}.tr-card--nora .tr-meta{border-top:1px solid var(--color-neutral-200)}.tr-nora-chrome{position:relative}.tr-nora-chrome,.tr-nora-pill{opacity:var(--nora-chrome)}.tr-reason{overflow:hidden;border-radius:0 0 15px 15px}.tr-reason-in{display:flex;align-items:flex-start;gap:6px;padding:8px 12px;border-top:1px solid color-mix(in srgb,var(--color-warning-warm) 40%,transparent);background:color-mix(in srgb,var(--color-status-warning-bg) 40%,transparent);font-size:12px;line-height:1.45;color:var(--color-status-warning-fg)}.tr-room[data-reason=off] .tr-reason-in{opacity:0;transform:translateY(-6px)}html[data-motion=full] .tr-reason-in{transition:opacity var(--duration-ui) var(--ease-default),transform var(--duration-ui) var(--ease-default)}.tr-reason-icon{flex:none;margin-top:1px;width:14px;height:14px}.tr-reason-text{text-wrap:balance;display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2}@container trframe (max-width: 599.98px){.tr-reason-text{-webkit-line-clamp:3;line-clamp:3}}.tr-room[data-layer=overlay] .tr-shot-mask{visibility:hidden}.tr-room[data-layer=overlay] .tr-nora-pill{visibility:visible}.tr-report .tr-part{--part-t: clamp(0, (var(--report-parts) - var(--i, 0) * .15) / .7, 1);opacity:var(--part-t);transform:translateY(calc((1 - var(--part-t)) * 16px))}.tr-panes{display:grid;flex:1 1 0;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:minmax(0,1fr);gap:16px;min-height:0;padding:16px}@container trframe (min-width: 1032px){.tr-panes{grid-template-columns:minmax(0,1fr) minmax(420px,46%)}}@container trframe (max-width: 599.98px){.tr-panes{display:flex;flex-direction:column;gap:12px;padding:12px}.tr-stage{flex:0 0 var(--report-stage, 52%);order:-1;gap:8px}.tr-reading{flex:1 1 0}}.tr-reading{position:relative;min-width:0;min-height:0;overflow:clip;container:reading / inline-size}.tr-reading-content{position:relative;display:flex;flex-direction:column;gap:12px;transform:translateY(calc(-1 * var(--reading-offset, 0px)))}.tr-reading-content[data-focus=recommendations] .tr-summary,.tr-reading-content[data-focus=recommendations] .tr-row:not([data-entry="1"]){display:none}.tr-rcard{padding:16px;border:1px solid var(--color-neutral-200);border-radius:16px;background:var(--color-white)}.tr-heading-m{font-size:18px;line-height:1.4;font-weight:600}.tr-heading-s{flex:none;font-size:16px;line-height:1.4;font-weight:600}.tr-summary{display:flex;flex-direction:column;gap:16px}.tr-summary-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px}.tr-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}@container reading (min-width: 640px){.tr-stats{grid-template-columns:repeat(4,minmax(0,1fr))}}.tr-stat{display:flex;flex-direction:column;gap:2px;min-width:0}.tr-stat-value{font-size:16px;line-height:1.5;font-weight:600;font-variant-numeric:tabular-nums}.tr-now{padding:10px 12px;border-radius:16px;background:var(--color-cream-muted)}.tr-now .tr-section-label{margin-bottom:6px}.tr-now-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.tr-now-row[hidden]{display:none}.tr-now-label{font-size:14px;line-height:1.43;font-weight:600;font-variant-numeric:tabular-nums}.tr-now-tier{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--color-neutral-700)}.tr-card-head{display:flex;align-items:center;gap:8px}.tr-chevron{flex:none;margin-left:auto;color:var(--color-neutral-600)}.tr-rows,.tr-recs{margin:12px 0 0;padding:0;list-style:none}.tr-rows{display:flex;flex-direction:column;gap:4px;container:rows / inline-size}.tr-row{position:relative;display:grid;grid-template-columns:minmax(0,1fr);gap:12px;padding:10px 8px;border-radius:16px}@container rows (min-width: 320px){.tr-row{grid-template-columns:9rem minmax(0,1fr)}}@container rows (min-width: 480px){.tr-row{grid-template-columns:10rem minmax(0,1fr)}}.tr-row:before{content:"";position:absolute;inset:0;border-radius:inherit;background:var(--color-cream-muted);box-shadow:0 0 0 2px var(--color-accent);opacity:0}html[data-motion=full] .tr-row:before{transition:opacity var(--duration-ui) var(--ease-default)}[data-selected="1"] .tr-row[data-entry="1"]:before,[data-selected="2"] .tr-row[data-entry="2"]:before,[data-selected="3"] .tr-row[data-entry="3"]:before,[data-selected="4"] .tr-row[data-entry="4"]:before{opacity:1}.tr-row>*{position:relative}.tr-row-snap{display:flex;flex-direction:column;gap:4px;min-width:0}.tr-snap{position:relative;display:block;width:100%;aspect-ratio:16 / 9;overflow:hidden;border:1px solid var(--color-neutral-200);border-radius:14px;background:var(--color-white)}.tr-snap>*{position:absolute;inset:0;width:100%;height:100%}.tr-snap-svg{max-width:none}.tr-snap-ink path{fill:none;stroke:var(--color-ink-student);stroke-linecap:round;stroke-linejoin:round}.tr-snap-ink path[data-tone=tutor]{stroke:var(--color-ink-tutor)}.tr-snap-ink path[data-tone=underline]{stroke:var(--color-tutor-underline)}.tr-caption-s{font-size:11px;line-height:1.4;color:var(--color-neutral-600)}.tr-row-text{display:flex;flex-direction:column;gap:6px;min-width:0}.tr-row-top{display:flex;flex-wrap:wrap;align-items:flex-start;gap:6px 8px}.tr-row-num{display:grid;flex:none;place-items:center;width:20px;height:20px;margin-top:1px;border-radius:50%;background:var(--color-misconception);font-size:11px;line-height:1;font-weight:700;color:var(--color-neutral-950)}.tr-row-name{flex:1 1 9rem;min-width:0;font-size:14px;line-height:1.43;font-weight:600}.tr-row-evidence{color:var(--color-neutral-700)}.tr-row-meta{display:flex;flex-wrap:wrap;align-items:center;gap:4px 6px;color:var(--color-neutral-600)}.tr-recs{display:flex;flex-direction:column;gap:12px}.tr-rec{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px}.tr-rec-icon{display:grid;place-items:center;width:28px;height:28px;margin-top:2px;border-radius:50%;background:var(--color-cream-muted);color:var(--color-neutral-700)}.tr-rec-icon[data-source=misconception]{background:color-mix(in srgb,var(--color-misconception) 22%,transparent);color:var(--color-neutral-900)}.tr-rec-text{display:flex;flex-direction:column;gap:4px;min-width:0}.tr-rec-title{font-size:14px;line-height:1.43;font-weight:600}.tr-rec-evidence{color:var(--color-neutral-700)}.tr-strong{font-weight:600}.tr-stage{display:flex;flex-direction:column;gap:12px;min-width:0;min-height:0}.tr-board{position:relative;flex:1 1 0;min-height:0;overflow:hidden;border:1px solid var(--color-neutral-200);border-radius:16px;background:var(--color-white)}.tr-board-slot{position:absolute;inset:0}.tr-board-slot>*{width:100%;height:100%}.tr-lanes{flex:none;container:lanes / inline-size}.tr-lanes-card{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;padding:24px 12px 12px;border:1px solid var(--color-neutral-200);border-radius:16px;background:var(--color-white)}.tr-play{display:flex;flex:none;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:var(--color-neutral-900);color:var(--color-whiteboard-bg)}.tr-play-icon{margin-left:2px}.tr-track{position:relative;display:flex;flex:1 1 100%;flex-direction:column;gap:2px;order:-1;min-width:0}.tr-lane{display:flex;align-items:center;gap:8px;height:24px}.tr-lane-label{display:flex;flex:none;align-items:center;width:20px;font-size:12px;line-height:1.45;color:var(--color-neutral-600)}.tr-lane-icon{display:flex}.tr-lane-word{display:none;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.tr-lane-track{position:relative;flex:1 1 0;min-width:0;height:100%}.tr-span{position:absolute;top:50%;height:12px;border-radius:2px;background:var(--color-ink-student);opacity:.7;transform:translateY(-50%)}.tr-span[data-kind=erasing]{background:var(--color-erasing);opacity:1}.tr-talk,.tr-stop{position:absolute;top:50%;transform:translate(-50%,-50%);opacity:calc(1 - (.6*clamp(0,(var(--at, 0) - var(--lanes-p, 1)) * 100000,1)))}.tr-talk{display:flex;color:var(--color-neutral-700)}.tr-stop{z-index:1;display:flex;align-items:center;justify-content:center;width:20px;height:20px;border:2px solid var(--color-white);border-radius:50%;font-size:11px;line-height:1;font-weight:700}.tr-stop[data-paint=misconception]{background:var(--color-turn-misconception);color:var(--color-white)}.tr-stop[data-paint=onTrack]{background:color-mix(in srgb,var(--color-turn-on-track) 30%,var(--color-white));color:var(--color-turn-on-track-text)}.tr-stop[data-paint=solved]{background:var(--color-turn-solved);color:var(--color-white)}.tr-stop[data-paint=error]{background:var(--color-turn-error);color:var(--color-white)}.tr-stop[data-paint=unsure]{border:1.5px dashed var(--color-turn-idle);background:var(--color-white);color:var(--color-neutral-600)}.tr-ticks{display:flex;align-items:flex-end;gap:8px;height:16px}.tr-tick{position:absolute;bottom:0;font-size:11px;line-height:1.4;color:var(--color-neutral-600);font-variant-numeric:tabular-nums;white-space:nowrap;transform:translate(-50%)}.tr-playhead-layer{position:absolute;inset:0 0 0 28px;container-type:inline-size;pointer-events:none}.tr-playhead,.tr-playhead-time-at{position:absolute;left:0;transform:translate(calc(var(--lanes-p, 1) * 100cqw))}.tr-playhead{top:0;bottom:0;width:2px;margin-left:-1px;background:var(--color-neutral-900)}.tr-playhead-time-at{top:-20px}.tr-playhead-time{display:block;padding:2px 6px;border-radius:4px;background:var(--color-neutral-900);font-size:11px;line-height:1.4;font-weight:600;color:var(--color-whiteboard-bg);font-variant-numeric:tabular-nums;white-space:nowrap;transform:translate(-50%)}.tr-duration{flex:none;font-size:12px;line-height:1.45;color:var(--color-neutral-700);font-variant-numeric:tabular-nums}.tr-speed{display:inline-flex;flex:none;align-items:center;height:32px;margin-left:auto;padding:0 10px;border:1px solid var(--color-neutral-200);border-radius:14px;font-size:12px;line-height:1;font-weight:600;color:var(--color-neutral-700)}@container lanes (min-width: 28rem){.tr-lanes-card{flex-wrap:nowrap;gap:16px;padding-inline:16px}.tr-track{flex-basis:0;order:0}.tr-lane{gap:12px;height:28px}.tr-lane-label{width:72px}.tr-lane-icon{display:none}.tr-lane-word{display:block}.tr-ticks{gap:12px}.tr-playhead-layer{left:84px}.tr-speed{margin-left:0}}@container trframe (max-width: 599.98px){.tr-lanes-card{padding-bottom:8px}.tr-play,.tr-duration,.tr-speed{display:none}}@property --spot-x{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --spot-y{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --spot-w{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --spot-h{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --spot-chip-dx{syntax: "<length>"; inherits: false; initial-value: 0px;}.tr-spot{position:absolute;top:0;left:0;box-sizing:border-box;width:calc(var(--spot-w) + 24px);height:calc(var(--spot-h) + 24px);border:1px solid var(--color-misconception);border-radius:12px;pointer-events:none;opacity:0;transform:translate(calc(var(--spot-x) - 12px),calc(var(--spot-y) - 12px))}.tr-spot-chip{position:absolute;bottom:calc(100% + 6px);left:0;display:inline-flex;align-items:center;height:22px;margin-left:-1px;padding:0 10px;border-radius:999px;background:var(--color-misconception);font-family:var(--font-sans);font-size:11px;line-height:1;font-weight:600;color:var(--color-neutral-950);white-space:nowrap;opacity:0;translate:var(--spot-chip-dx) 0}:is([data-spot=on] .tr-spot,.tr-spot[data-spot=on]),:is([data-spot=on] .tr-spot,.tr-spot[data-spot=on]) .tr-spot-chip{opacity:1}html[data-motion=full] .tr-spot{transition:opacity .48s cubic-bezier(.4,0,1,1)}html[data-motion=full] .tr-spot-chip{transform:translateY(4px);transition:opacity 0s linear .48s,transform 0s linear .48s}html[data-motion=full] :is([data-spot=on] .tr-spot,.tr-spot[data-spot=on]){transition:opacity .32s cubic-bezier(.2,.8,.2,1)}html[data-motion=full] :is([data-spot=on] .tr-spot,.tr-spot[data-spot=on]) .tr-spot-chip{transform:none;transition:opacity .32s cubic-bezier(.2,.8,.2,1) 90ms,transform .32s cubic-bezier(.2,.8,.2,1) 90ms}.tr-mark-rect{fill:var(--color-misconception);fill-opacity:.16;stroke:var(--color-misconception)}.tr-mark-tag{fill:var(--color-misconception)}.tr-mark-num{fill:var(--color-neutral-950);font-family:var(--font-sans);font-weight:700}@property --tb-caption-o{syntax: "<number>"; inherits: false; initial-value: 0;}#story-b .tb-screen{--tb-band-h: var(--caption-band-h)}.tb-screen{position:absolute;inset:0}.tb-screen[data-snap] *{transition:none!important;animation-duration:0s!important}.tb-box{position:absolute;inset:6% 4% 6% 36%;pointer-events:none}.tb-box--base{z-index:1}.tb-screen>.tb-window-lift{position:absolute;inset:0;z-index:2;transition:filter var(--duration-ui) var(--ease-default)}.tb-screen[data-room=off]:not([data-landed])>.tb-window-lift{filter:drop-shadow(0 0 1px var(--frame-hairline)) drop-shadow(0 16px 28px color-mix(in srgb,var(--color-neutral-900) 16%,transparent))}.tb-box--over{z-index:3}.tb-layer{position:absolute;inset:0}.tb-screen[data-room=off] [data-frame=room],.tb-screen[data-report=off] [data-frame=report]{visibility:hidden}.tb-screen:not([data-landed]) .tr-board{visibility:hidden}.tb-tile-header{opacity:calc(var(--statement-o, 1) * clamp(0,2 * var(--statement-chip, 0) - 1,1))}.tb-labels{position:absolute;inset:0;z-index:4;pointer-events:none}.tb-screen>.tb-caption{z-index:5;opacity:var(--tb-caption-o)}.tb-chapters{display:grid}.tb-chapter{grid-area:1 / 1;align-self:center;display:flex;flex-direction:column;gap:18px}@media(max-width:1023.98px),(max-height:599.98px){#story-b .tb-screen{--tb-band-h: max(var(--caption-band-h), min(204px, 26svh))}.tb-box{inset:calc(var(--tb-band-h) + 12px) 16px calc(100lvh - 100svh + 16px)}.tb-screen>.tb-caption{height:var(--tb-band-h);justify-content:flex-end;padding-bottom:0;clip-path:inset(-100vh -100vw 0 -100vw)}.tb-chapter{align-self:end;gap:6px}}@container trframe (max-width: 599.98px){.tb-screen .tr-stage{flex:0 1 auto;min-height:0}.tb-screen .tr-board{flex:0 1 min(240px,28svh)}.tb-screen .tr-summary{display:none}.tb-screen .tr-lanes-card{flex-wrap:nowrap;gap:10px;padding:22px 12px 8px}.tb-screen .tr-play{display:flex;width:32px;height:32px}.tb-screen .tr-track{flex:1 1 0;order:0}.tb-screen .tr-lane:not([data-lane=tutor]),.tb-screen .tr-ticks,.tb-screen .tr-lane-label{display:none}.tb-screen .tr-playhead-layer{left:0}}@media(min-width:768px)and (max-width:1023.98px){.tb-box{inset-inline:var(--gutter)}}html:not([data-motion=full]) #story-b{display:flex;flex-direction:column;padding-block:56px clamp(80px,10vw,140px)}html:not([data-motion=full]) #story-b>.stage-figures{display:contents}html:not([data-motion=full]) #story-b>.stage-anchor{position:static;scroll-margin-top:calc(var(--header-h) + 32px)}html:not([data-motion=full]) #story-b>#classroom{order:1}html:not([data-motion=full]) #story-b .stage-figure[data-figure=room]{order:2}html:not([data-motion=full]) #story-b>#report{order:3;margin-top:clamp(64px,9vw,120px)}html:not([data-motion=full]) #story-b .stage-figure[data-figure=report]{order:4}.tb-figure-copy{gap:28px}.tb-figure-copy>.t-eyebrow{margin-bottom:-14px}.tb-figure-beat{display:grid;gap:10px}.tb-figure-shot{position:relative;height:clamp(560px,58vw,700px)}.tb-figure-shot[data-kind=report]{height:clamp(620px,58vw,700px)}@media(max-width:767.98px){.tb-figure-shot[data-kind=room]{height:560px}.tb-figure-shot[data-kind=report]{height:660px}.tb-figure-shot[data-kind=report] [data-section=misconceptions]{display:none}}.tb-thumb .session-board.tb-thumb-ink{position:absolute;top:54px;left:12px;width:calc(100% - 24px);height:calc(100% - 64px);overflow:hidden}.tb-thumb-ink :is(.board-paper,.board-statement){display:none}.tb-spot-fig{display:grid;place-items:center;overflow:hidden;background-color:var(--color-whiteboard-bg);container-type:size}.tb-spot-fig-box{position:relative;width:min(100cqw,100cqh * var(--ar, 2));max-height:100cqh;container-type:size}.tb-spot-fig-box>.session-board{position:absolute;inset:0}.ex-runner,.ex-lib,.ex-results,.ex-row,.ex-card{--p-canvas: var(--color-neutral-100);--p-card: var(--color-white);--p-surface: var(--color-neutral-050);--p-surface-muted: var(--color-cream-muted);--p-border: var(--color-neutral-200);--p-text: var(--color-neutral-900);--p-secondary: var(--color-neutral-700);--p-muted: color-mix(in srgb, var(--color-neutral-600) 50%, var(--color-neutral-700));--p-primary: var(--color-neutral-950);--p-success: var(--color-report-solved);--p-error: var(--color-product-error);--p-accent: var(--color-lavender-700);--p-accent-dark: var(--color-lavender-900);color:var(--p-text);font-family:var(--font-sans);line-height:1.5;pointer-events:none}.ex-runner,.ex-lib,.ex-results{position:relative;height:100%;overflow:clip;border-radius:var(--radius-xl);box-shadow:0 0 0 1px var(--frame-hairline),var(--frame-shadow)}.ex-runner{container:ex-runner / inline-size;background:radial-gradient(circle,var(--color-board-dot) 1.4px,transparent 1.6px) 6px 6px / 28px 28px var(--color-whiteboard-bg)}.ex-runner__content,.ex-runner__item,.ex-runner__face,.ex-board{position:absolute;inset:0}.ex-runner__item{opacity:0;transform:translate(24px);transition:opacity var(--duration-normal) var(--ease-in),transform 0s linear var(--duration-normal)}.ex-runner[data-item="1"] [data-ex-item="1"],.ex-runner[data-item="2"] [data-ex-item="2"],.ex-runner[data-item="3"] [data-ex-item="3"]{opacity:1;transform:none;transition:opacity var(--duration-slower) var(--ease-default) .1s,transform var(--duration-slower) var(--ease-default) .1s}.ex-runner[data-static] .ex-runner__item{transition:none}.ex-runner__face{background:var(--p-card);opacity:0}.ex-statement{position:absolute;top:64px;left:50%;margin:0;padding:30px 44px;border-radius:var(--radius-xl);background:var(--color-white);box-shadow:var(--shadow-product-sm);color:var(--color-neutral-900);font:40px / 1 var(--font-math);white-space:nowrap;transform:translate(-50%)}.ex-math-x{font-family:var(--font-math-italic);font-style:italic}.ex-math-bin{margin-inline:.2222em}.ex-math-rel{margin-inline:.2778em}.ex-runner .sb-toolbar{bottom:-10px}.ex-runner .nb{box-shadow:none}.ex-pill{position:absolute;top:8px;right:56px;left:56px;z-index:3;display:flex;justify-content:center}.ex-pill__box{display:flex;width:min(384px,100%);min-width:0;align-items:center;justify-content:center;gap:8px;margin:0;padding:6px 8px;border:1px solid var(--p-border);border-radius:14px;background:var(--p-card);box-shadow:var(--shadow-sm);font-size:12px}.ex-pill__title{overflow:hidden;min-width:0;font-weight:600;text-overflow:ellipsis;white-space:nowrap}.ex-pill__counts{flex:none;color:var(--p-secondary);white-space:nowrap}.ex-pill__count{display:none}.ex-runner[data-item="1"] [data-n="1"],.ex-runner[data-item="2"] [data-n="2"],.ex-runner[data-item="3"] [data-n="3"],.ex-pill[data-current="1"] [data-n="1"],.ex-pill[data-current="2"] [data-n="2"],.ex-pill[data-current="3"] [data-n="3"]{display:inline}@container ex-runner (max-width: 759.98px){.ex-runner[data-item="3"] .ex-pill{top:76px}.ex-runner .nb-sheet{margin-top:44px}.ex-runner:not([data-static])[data-item="3"] .ex-pill__box{animation:ex-arrive var(--duration-slower) var(--ease-default) .1s both}}@container ex-runner (max-width: 399.98px){.ex-runner .sb-toolbar{transform:translate(-50%) scale(.86);transform-origin:50% 100%}}@keyframes ex-arrive{0%{opacity:0}}.ex-btn{position:relative;display:inline-flex;height:28px;align-items:center;padding:0 12px;border-radius:9px;background:var(--p-surface-muted);color:var(--p-text);font-size:12px;font-weight:500;white-space:nowrap;transition:transform .15s var(--ease-out)}.ex-btn:after{position:absolute;inset:0;border-radius:inherit;background:color-mix(in srgb,var(--color-neutral-900) 8%,transparent);content:"";opacity:0;transition:opacity .15s var(--ease-out)}.ex-btn[data-pressed]{transform:scale(.97)}.ex-btn[data-pressed]:after{opacity:1}.ex-btn--md{height:32px;padding:0 14px;font-size:13px}.ex-card{position:relative;display:flex;height:100%;min-width:0;flex-direction:column;overflow:hidden;border:1px solid var(--p-border);border-radius:var(--radius-xl);background:var(--p-card)}.ex-card:before{position:absolute;inset:0 auto 0 0;width:6px;background:color-mix(in srgb,var(--p-success) 60%,transparent);content:""}.ex-card__body{display:flex;flex:1;flex-direction:column;gap:16px;padding:20px 20px 20px 24px}.ex-card__head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.ex-card__status{display:inline-flex;align-items:center;gap:4px;padding:4px 8px;border-radius:4px;background:color-mix(in srgb,var(--p-success) 10%,transparent);color:var(--p-success);font-size:12px;font-weight:600}.ex-card__date,.ex-card__saved{color:var(--p-muted);font-size:12px}.ex-card__date{padding-top:4px}.ex-card__title{margin:0;font-size:18px;font-weight:600;letter-spacing:-.01em;line-height:1.375}.ex-card__who{display:flex;align-items:center;gap:10px}.ex-card__avatar{display:grid;width:32px;height:32px;flex:none;place-items:center;border-radius:50%;background:var(--p-surface-muted);font-weight:600}.ex-card__avatar,.ex-card__name,.ex-card__seq-label,.ex-card__counts [data-tone=ungraded]{color:var(--p-secondary);font-size:12px}.ex-card__seq{flex:1;padding:12px;border-radius:14px;background:var(--p-surface)}.ex-card__seq-label{margin:0 0 8px;font-weight:600}.ex-chips{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}.ex-chip{--tone: var(--p-success);display:inline-flex;height:36px;min-width:40px;align-items:center;justify-content:center;gap:4px;padding:0 6px;border:1px solid color-mix(in srgb,var(--tone) 30%,transparent);border-radius:8px;background:color-mix(in srgb,var(--tone) 10%,transparent);color:var(--tone);font-size:12px}.ex-chip[data-outcome=incorrect]{--tone: var(--p-error)}.ex-chip[data-outcome=notebook]{--tone: var(--p-accent);color:var(--p-accent-dark)}.ex-chip__n{font-variant-numeric:tabular-nums;font-weight:600}.ex-card__counts{display:flex;flex-wrap:wrap;gap:4px 12px;margin:0;font-size:12px}.ex-card__counts [data-tone=correct]{color:var(--p-success)}.ex-card__counts [data-tone=incorrect]{color:var(--p-error)}.ex-card__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px 12px 24px;border-top:1px dashed var(--p-border);background:color-mix(in srgb,var(--p-surface) 70%,transparent)}.ex-lib{--ex-z: .8;background:var(--p-canvas)}.ex-lib__page{container:ex-page / inline-size;width:calc(100% / var(--ex-z));padding:26px 32px;transform:scale(var(--ex-z));transform-origin:0 0}.ex-lib__head{display:flex;align-items:center;gap:12px;margin-bottom:18px}.ex-lib__title{font-size:24px;font-weight:600;letter-spacing:-.01em}.ex-lib__tabs{display:flex;gap:32px;margin-bottom:24px;border-bottom:1px solid var(--p-border)}.ex-lib__tab{position:relative;display:inline-flex;align-items:center;gap:8px;padding:14px 0;color:var(--p-secondary);font-size:15px;font-weight:600}.ex-lib__tab[data-active]{color:var(--p-text)}.ex-lib__tab[data-active]:after{position:absolute;right:0;bottom:-1px;left:0;height:2px;background:var(--p-primary);content:""}.ex-lib__count{padding:2px 6px;border-radius:4px;background:var(--p-surface-muted);color:var(--p-text);font-size:12px;font-variant-numeric:tabular-nums;font-weight:400}.ex-lib__bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}.ex-lib__desc{max-width:576px;margin:0;color:var(--p-secondary);font-size:13px;line-height:1.6}.ex-lib__search{display:flex;width:256px;flex:none;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--p-border);border-radius:14px;background:var(--p-card);color:var(--p-muted);font-size:12px}.ex-lib__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:0;padding:0;list-style:none}@container ex-page (min-width: 936px){.ex-lib__grid{grid-template-columns:repeat(3,minmax(0,1fr))}}.ex-results{padding-top:32px;background:var(--p-canvas)}.ex-results__card{width:min(768px,calc(100% - 48px));margin:0 auto;padding:24px;border:1px solid var(--p-border);border-radius:var(--radius-xl);background:var(--p-card);box-shadow:var(--shadow-sm)}.ex-results__label{margin:0 0 8px;color:var(--p-primary);font-size:12px;font-weight:600}.ex-results__title{margin:0;font-size:16px;font-weight:600}.ex-results__rows{display:flex;flex-direction:column;gap:12px;margin:24px 0 0;padding:0;list-style:none}.ex-results__back{margin-top:24px}.ex-row{display:block;padding:16px;border:1px solid var(--p-border);border-radius:14px;background:var(--p-card)}.ex-row__top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}.ex-row__title{font-size:14px;font-weight:600}.ex-row__status{color:var(--p-secondary);font-size:12px}.ex-row__replay{margin-top:12px}@media(max-width:1023.98px),(max-height:599.98px){.ex-statement{padding:18px 22px;font-size:clamp(22px,6.4vw,34px)}.ex-runner .sb-toolbar{bottom:-18px}.ex-lib{--ex-z: .82}.ex-lib__page{padding:20px 16px}.ex-lib__grid{grid-template-columns:minmax(0,1fr)}.ex-lib__bar{flex-direction:column;align-items:stretch;gap:12px}.ex-lib__search{width:auto}.ex-lib__tabs{gap:20px}.ex-results{padding-top:16px}.ex-results__card{width:calc(100% - 24px);padding:18px}}.sb-toolbar{--sb-btn-md: 48px;--sb-btn-lg: 80px;--sb-icon-md: 22px;--sb-icon-lg: 32px;--sb-gap-md: 16px;--sb-gap-lg: 32px;position:absolute;bottom:0;left:var(--chrome-cx, 50cqw);display:flex;align-items:flex-end;gap:var(--sb-gap-md);padding-block:var(--sb-gap-lg);transform:translate(-50%);opacity:1;transition:transform var(--duration-normal) var(--ease-in-out),opacity var(--duration-normal) var(--ease-in-out)}.sb-toolbar[data-hidden]{transform:translate(-50%) translateY(var(--sb-slide, 200px));opacity:0;transition-delay:.15s}@media(min-width:1000px)and (max-width:1599px)and (max-height:900px){.sb-toolbar{--sb-btn-md: 42px;--sb-btn-lg: 70px;--sb-icon-md: 20px;--sb-icon-lg: 28px;--sb-gap-md: 13px;--sb-gap-lg: 28px;--sb-slide: 170px}}@media(max-width:999px){.sb-toolbar{--sb-btn-md: 40px;--sb-btn-lg: 68px;--sb-icon-md: 19px;--sb-icon-lg: 26px;--sb-gap-md: 14px;--sb-gap-lg: 27px;--sb-slide: 170px}}@media(max-width:599px){.sb-toolbar{--sb-btn-md: 36px;--sb-btn-lg: 60px;--sb-icon-md: 17px;--sb-icon-lg: 24px;--sb-gap-md: 12px;--sb-gap-lg: 22px;--sb-slide: 140px}}.sb-tool{position:relative;display:flex;flex:none;align-items:center;justify-content:center;width:var(--sb-btn-md);height:var(--sb-btn-md);border:1px solid var(--color-neutral-200);border-radius:var(--radius-full);background-color:var(--color-cream-muted);color:var(--color-neutral-600);box-shadow:var(--shadow-product-sm);transition:background-color var(--duration-normal) var(--ease-default),color var(--duration-normal) var(--ease-default)}.sb-tool__icon{width:var(--sb-icon-md);height:var(--sb-icon-md)}.sb-tool__icon--lg{width:var(--sb-icon-lg);height:var(--sb-icon-lg)}.sb-tool--undo{position:absolute;right:calc(100% + var(--sb-gap-md));bottom:var(--sb-gap-lg)}.sb-toolbar[data-eraser] .sb-tool--eraser{background-color:var(--color-product-error);color:var(--color-white)}.sb-tool--mic{width:var(--sb-btn-lg);height:var(--sb-btn-lg)}.sb-tool--send{background-color:var(--color-accent);border-color:transparent;color:var(--color-white)}.sb-tool__ring{position:absolute;inset:-4px;border:2px solid var(--color-accent);border-radius:inherit;opacity:0;pointer-events:none}.sb-pill{position:absolute;bottom:24px;left:var(--chrome-cx, 50cqw);display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:min(20rem,100cqw - 64px);padding:8px 8px 8px 16px;border-radius:var(--radius-lg);background-color:var(--color-cream-muted);box-shadow:0 4px 12px color-mix(in srgb,var(--color-neutral-1000) 8%,transparent);transform:translate(-50%) translateY(calc(100% + 24px));opacity:0;transition:transform var(--duration-normal) var(--ease-in-out),opacity var(--duration-normal) var(--ease-in-out)}.sb-pill[data-shown]{transform:translate(-50%);opacity:1}.sb-pill__lead{display:flex;align-items:center;gap:10px}.sb-pill__symbols{display:flex;align-items:center;gap:2px}.sb-pill__symbols span{color:var(--color-interactive-primary);font-size:12px;font-weight:700;line-height:16px;animation:sb-symbol-pulse 1.8s ease-in-out infinite paused}.sb-pill[data-shown] .sb-pill__symbols span{animation-play-state:running}@keyframes sb-symbol-pulse{0%,to{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1.1)}}.sb-pill__text{color:var(--color-neutral-900);font-size:13px;font-weight:600;line-height:18px;white-space:nowrap}.sb-pill__stop{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--radius-md);background-color:var(--color-neutral-600);color:var(--color-cream-muted);font-size:12px;font-weight:600;line-height:16px;white-space:nowrap}.sb-pill__stop svg{fill:currentColor}.tp{--tp-band-w: min(max(43.333cqw, 360px), 100cqw - 48px);--tp-band-bottom: 56px;--tp-band-h: 105px;--tp-inset: 96px;--tp-band-x: calc(var(--chrome-cx, 50cqw) - var(--tp-band-w) / 2);--tp-band-y: calc(100cqh - var(--tp-band-bottom) - var(--tp-band-h));--tp-dock-w: 180px;--tp-dock-x: var(--dock-x, 32px);--tp-dock-y: var(--dock-y, 24px);position:absolute;inset:0;color:var(--color-white);pointer-events:none}@media(max-width:599.98px){.tp{--tp-inset: 40px}}.tp-band,.tp-dock{position:absolute;isolation:isolate;transform-origin:0 0;transition:transform var(--duration-dock) var(--ease-dock),opacity var(--duration-ui) var(--ease-out)}.tp-halo,.tp-pill{position:absolute;pointer-events:none}.tp-halo{z-index:-2;inset:0;border-radius:30px;background:var(--color-tutor-hint-halo);filter:blur(45px);transform:scale(1.18)}.tp-pill{z-index:-1;inset:-8px -16px;border-radius:30px;background:radial-gradient(135% 150% at 50% 50%,var(--color-tutor-hint) 0%,var(--color-tutor-hint) 50%,color-mix(in srgb,var(--color-tutor-hint) 50%,transparent) 74%,color-mix(in srgb,var(--color-tutor-hint) 0%,transparent) 100%);filter:blur(7px)}.tp-band{top:var(--tp-band-y);left:var(--tp-band-x);width:var(--tp-band-w);height:var(--tp-band-h);opacity:0;transform:translateY(12px)}.tp-band__content{display:grid;align-items:center;height:100%;overflow:hidden;padding-inline:calc(var(--tp-inset) / 2)}.tp-hint{grid-area:1 / 1;display:grid;align-items:center;font-size:var(--tp-font, 20px);font-weight:600;line-height:1.4;text-align:center}.tp-hint:not([data-on]){visibility:hidden}.tp-sentence{grid-area:1 / 1;opacity:0;transform:translateY(9px);transition:opacity .4s ease,transform .4s ease}.tp-sentence[data-on]{opacity:1;transform:none}.tp-sentence [data-start]{color:color-mix(in srgb,var(--color-white) 75%,transparent);transition:color .3s ease}.tp-sentence [data-read]{color:var(--color-white)}.tp-probe{position:absolute;top:0;left:-99999px;visibility:hidden;font-weight:600;line-height:1.4;pointer-events:none}.tp-dock{top:var(--tp-dock-y);left:var(--tp-dock-x);width:var(--tp-dock-w);opacity:0;transform:translate(calc(var(--tp-band-x) - var(--tp-dock-x)),calc(var(--tp-band-y) - var(--tp-dock-y))) scale(var(--tp-k-inv, 3))}.tp-dock .tp-halo{opacity:.72;transform:scale(1.08)}.tp-dock__content{min-height:64px;padding:12px 38px 12px 12px;font-size:12px;font-weight:600;line-height:1.4}.tp-dock__group{display:grid}.tp-dock__group:not([data-shown]){display:none}.tp-dock__text{grid-area:1 / 1;align-self:center;opacity:0}.tp-dock__text[data-on]{opacity:1}.tp[data-crossfade] .tp-dock__text{transition:opacity var(--duration-slower) var(--ease-out)}.tp-corner{position:absolute;right:-2px;display:grid;place-items:center;width:24px;height:24px;border-radius:6px;background-color:color-mix(in srgb,var(--color-white) 10%,transparent)}.tp-corner--top{top:6px}.tp-corner--bottom{bottom:6px}.tp-corner--bottom svg{transform:rotate(90deg)}.tp-corner svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}.tp[data-mode=reading] .tp-band{opacity:1;transform:none}.tp[data-mode=docked] .tp-band{opacity:0;transform:translate(calc(var(--tp-dock-x) - var(--tp-band-x)),calc(var(--tp-dock-y) - var(--tp-band-y))) scale(var(--tp-k, .33))}.tp[data-mode=docked] .tp-dock{opacity:1;transform:none}@media(max-width:1023.98px),(max-height:599.98px){.tp{--tp-band-w: calc(100cqw - 64px) ;--tp-dock-x: calc(var(--chrome-cx, 50cqw) - var(--tp-dock-w) / 2)}.tp-dock{top:auto;bottom:var(--dock-bottom, 120px);transform-origin:0 100%;transform:translate(calc(var(--tp-band-x) - var(--tp-dock-x)),calc(var(--dock-bottom, 120px) - var(--tp-band-bottom))) scale(var(--tp-k-inv, 2))}.tp-band{transform-origin:0 100%}.tp[data-mode=docked] .tp-band{transform:translate(calc(var(--tp-dock-x) - var(--tp-band-x)),calc(var(--tp-band-bottom) - var(--dock-bottom, 120px))) scale(var(--tp-k, .5))}.tp[data-mode=docked] .tp-dock{transform:none}}.tp--figure .tp-band,.tp--figure .tp-dock,.tp--figure .tp-sentence,.tp--figure .tp-dock__text{transition:none}.tp--figure[data-mode=docked] .tp-band,.tp--figure[data-mode=reading] .tp-dock{display:none}.tp--figure .tp-dock{transform:none}@media(prefers-reduced-motion:reduce){.sb-toolbar,.sb-pill,.tp-band,.tp-dock,.tp-sentence,.tp[data-crossfade] .tp-dock__text{transition:none}}.ins-layers,.ins-pred{--p-canvas: var(--color-neutral-100);--p-card: var(--color-white);--p-surface-muted: var(--color-cream-muted);--p-border: var(--color-neutral-200);--p-text: var(--color-neutral-900);--p-secondary: var(--color-neutral-700);--p-muted: color-mix(in srgb, var(--color-neutral-600) 50%, var(--color-neutral-700));--p-primary: var(--color-neutral-950);--p-accent: var(--color-lavender-700);--p-accent-dark: var(--color-lavender-900);color:var(--p-text);font-family:var(--font-sans);line-height:1.5;pointer-events:none}.ins-layers{--ins-cols: 196px minmax(0, 1fr);--ins-gap: 16px;--ins-pad: 16px;container:ins-layers / inline-size;display:flex;width:100%;flex-direction:column;gap:8px}.ins-layers__head{position:relative;z-index:6}.ins-layer{position:relative;display:grid;min-height:58px;align-items:center;grid-template-columns:var(--ins-cols);gap:var(--ins-gap);padding:10px var(--ins-pad);border:1px solid var(--p-border);border-radius:14px;background:var(--p-card)}.ins-layer__label{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;line-height:1.25}.ins-layer__glyph{display:grid;width:16px;flex:none;place-items:center;color:var(--p-secondary)}.ins-layer__glyph>.ins-dots{transform:scale(.53)}.ins-short{display:none}.ins-track{position:relative;height:28px}.ins-track:before{position:absolute;top:50%;right:0;left:0;height:1px;background:var(--p-border);content:""}.ins-track[data-track="3"]{height:34px}.ins-track[data-track="3"]:before{top:9px}.ins-track[data-track="4"]{height:auto}.ins-track[data-track="4"]:before{content:none}.ins-span{position:absolute;top:50%;height:12px;border-radius:2px;background:var(--color-ink-student);opacity:.7;transform:translateY(-50%)}.ins-span[data-kind=erasing]{background:var(--color-erasing);opacity:1}.ins-mark{position:absolute;top:50%;transform:translate(-50%,-50%)}.ins-talk{display:flex;color:var(--color-neutral-700)}.ins-stop{display:flex;width:20px;height:20px;align-items:center;justify-content:center;border:2px solid var(--color-white);border-radius:50%;background:var(--color-turn-solved);color:var(--color-white);font-size:11px;font-weight:700;line-height:1}.ins-stop[data-paint=misconception]{background:var(--color-turn-misconception)}.ins-stop[data-paint=onTrack]{background:color-mix(in srgb,var(--color-turn-on-track) 30%,var(--color-white));color:var(--color-turn-on-track-text)}.ins-help{top:6px;display:flex;flex-direction:column;align-items:center;gap:3px;transform:translate(-50%)}.ins-help__tier{color:var(--p-accent-dark);font-size:11px;font-weight:600;line-height:1.2;white-space:nowrap}.ins-dots{display:inline-flex;gap:2px}.ins-dots>span{width:6px;height:6px;border-radius:50%;background:var(--p-border)}.ins-dots>[data-on]{background:var(--p-accent)}.ins-mis{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;font-size:13px}.ins-kind{width:9px;height:9px;flex:none;border-radius:50%;background:var(--color-misconception)}.ins-fixed{padding:2px 8px;border-radius:6px;background:var(--color-status-success-bg);color:var(--color-status-success-fg);font-size:12px;font-weight:500;white-space:nowrap}.ins-axis{display:grid;grid-template-columns:var(--ins-cols);gap:var(--ins-gap);padding:0 calc(var(--ins-pad) + 1px);color:var(--p-muted);font-size:11px;font-variant-numeric:tabular-nums}.ins-axis__track{position:relative;height:16px}.ins-tick{position:absolute;top:0;transform:translate(-50%);white-space:nowrap}.ins-tick--end{left:100%}@container ins-layers (max-width: 559.98px){.ins-layer{min-height:0;grid-template-columns:minmax(0,1fr);gap:6px;padding:8px 12px}.ins-axis{grid-template-columns:minmax(0,1fr);padding:0 13px}.ins-axis>span:first-child{display:none}}.ins-tick[data-near-end]{display:none}@container ins-layers (max-width: 360px){.ins-layers{gap:6px}.ins-layer,.ins-axis{grid-template-columns:120px minmax(0,1fr);gap:8px}.ins-layer{padding:6px 10px}.ins-axis{padding:0 11px}.ins-axis>span:first-child{display:block}.ins-layer__label{gap:6px;font-size:12px}.ins-layer__glyph svg{width:15px;height:15px}.ins-track{height:24px}.ins-stop{width:16px;height:16px;border-width:1.5px;font-size:10px}.ins-mis{gap:4px 6px;font-size:12px}.ins-track[data-track="4"]{grid-column:1 / -1}.ins-help[data-help=none],.ins-long{display:none}.ins-short{display:inline}}.ins-pred{position:relative;width:min(784px,100%);height:100%;margin-inline:auto;overflow:clip;border-radius:var(--radius-xl);background:var(--p-canvas);box-shadow:0 0 0 1px var(--frame-hairline),var(--frame-shadow)}.ins-pred[data-static]{height:auto}.ins-pred__page{display:flex;flex-direction:column;gap:20px;padding:28px 32px}.ins-pred__head{display:flex;align-items:center;gap:12px}.ins-pred__avatar{display:grid;width:44px;height:44px;flex:none;place-items:center;border-radius:50%;background:var(--p-surface-muted);font-size:14px;font-weight:600}.ins-pred__who,.ins-pc__names{display:flex;min-width:0;flex-direction:column}.ins-pred__name{font-size:20px;font-weight:600;line-height:1.3}.ins-pred__sub,.ins-pred__hint,.ins-pc__kind,.ins-pc__drivers{color:var(--p-secondary);font-size:12px}.ins-pred__tabs{display:flex;gap:24px;border-bottom:1px solid var(--p-border)}.ins-pred__tabs>span{position:relative;padding:10px 0;color:var(--p-secondary);font-size:12px;font-weight:600}.ins-pred__tabs>[data-active]{color:var(--p-text)}.ins-pred__tabs>[data-active]:after{position:absolute;right:0;bottom:-1px;left:0;height:2px;background:var(--p-primary);content:""}.ins-pred__section,.ins-pc,.ins-pc__all{display:flex;flex-direction:column;gap:12px}.ins-pred__heading{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.ins-pred__title{font-size:18px;font-weight:600}.ins-pred__badge,.ins-pc__band{flex:none;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:500}.ins-pred__badge{margin-left:auto;background:var(--color-status-info-bg);color:var(--color-status-info-fg)}.ins-pred__hint{max-width:68ch;margin:0}.ins-pc{--band: var(--color-status-success-fg);--band-bg: var(--color-status-success-bg);padding:16px;border:1px solid var(--p-border);border-radius:24px;background:var(--p-card)}.ins-pc[data-band=borderline]{--band: var(--color-status-warning-fg);--band-bg: var(--color-status-warning-bg)}.ins-pc[data-band=at_risk]{--band: var(--color-status-error-fg);--band-bg: var(--color-status-error-bg)}.ins-pc__top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.ins-pc__name{font-size:14px;font-weight:500}.ins-pc__band{background:var(--band-bg);color:var(--band)}.ins-pc__num{display:flex;align-items:baseline;gap:8px}.ins-pc__score{font-size:22px;font-variant-numeric:tabular-nums;font-weight:600;line-height:1.3}.ins-pc__max,.ins-pc__labels,.ins-pc__foot{color:var(--p-muted);font-size:12px}.ins-pc__trend,.ins-pc__arrow{color:var(--color-status-success-fg)}.ins-pc__trend{display:inline-flex;align-items:center;gap:2px;margin-left:auto;font-size:12px;font-variant-numeric:tabular-nums}.ins-pc [data-dir=down]{color:var(--color-status-error-fg)}.ins-pc__scale,.ins-pc__drivers{display:flex;flex-direction:column;gap:4px}.ins-pc__drivers{gap:6px}.ins-pc__bar{position:relative;height:8px;border-radius:999px;background:var(--p-surface-muted)}.ins-pc__range,.ins-pc__mark,.ins-pc__pass{position:absolute}.ins-pc__range{top:0;bottom:0;border-radius:999px;background:var(--band);opacity:.3}.ins-pc__mark{top:-4px;width:4px;height:16px;border-radius:999px;background:var(--band);transform:translate(-50%)}.ins-pc__pass{top:-6px;width:1px;height:20px;background:var(--p-muted)}.ins-pc__labels{display:flex;justify-content:space-between;font-variant-numeric:tabular-nums}.ins-pc__driver{display:flex;gap:8px}.ins-pc__arrow{flex:none;margin-top:2px}.ins-pc__foot{padding-top:8px;border-top:1px solid var(--p-border)}.ins-pred:not([data-static]) :is([data-pred-part],[data-pred-follow]){opacity:0;transform:translateY(8px);transition:opacity var(--duration-slow) var(--ease-out),transform var(--duration-slow) var(--ease-out)}.ins-pred:not([data-static]) [data-pred-part][data-in],.ins-pred:not([data-static]):has([data-pred-part="4"][data-in]) [data-pred-follow]{opacity:1;transform:none}.ins-pred:not([data-static]) .ins-pc__range{transform:scaleX(0);transition:transform var(--duration-slower) var(--ease-default) .1s}.ins-pred:not([data-static]) [data-in] .ins-pc__range{transform:none}@media(max-width:1023.98px),(max-height:599.98px){.ins-pred__page{gap:16px;padding:20px 16px}}@media(max-width:1023.98px)and (max-height:679.98px){.ins-pred:not([data-static]) .ins-pred__page{gap:12px;padding-top:16px}.ins-pred:not([data-static]) .ins-pred__hint{display:none}}.ins-soon{display:inline-flex;height:26px;flex:none;align-items:center;gap:7px;padding:0 11px 0 9px;border-radius:999px;background:var(--color-white);box-shadow:0 0 0 1px var(--color-lavender-300),var(--shadow-product-sm);color:var(--color-neutral-900);font:600 12px / 1 var(--font-sans);white-space:nowrap}.ins-soon:before{width:7px;height:7px;border-radius:50%;background:var(--color-accent);content:""}html[data-motion=full] #tests{scroll-margin-top:0}.ts-screen{position:absolute;inset:0}.ts-screen[data-snap] *{transition:none!important;animation-duration:0s!important}#tests[data-active] :is(.ts-runner,.ts-predictions,.ex-runner__content,.ex-runner__face,[data-ex-focus],[data-layer],[data-layers-head]){will-change:transform,opacity}.ts-caption .stage-beat{align-content:start}.ts-short{display:none}@media(max-width:360px){.ts-long{display:none}.ts-short{display:inline}}.ts-zone{position:absolute;inset:6% 4% 6% 36%}.ts-zone>*{position:absolute;inset:0}.ts-runner{transform-origin:0 0}.ts-predictions{width:min(784px,100%);margin-inline:auto;opacity:0;visibility:hidden}.ts-library,.ts-results{opacity:0;visibility:hidden;transition:opacity var(--duration-slow) var(--ease-in),transform 0s linear var(--duration-slow),visibility 0s linear var(--duration-slow)}.ts-results{transform:translate3d(0,24px,0)}.ts-library[data-shown],.ts-results[data-shown]{opacity:1;visibility:visible;transform:none;transition:opacity var(--duration-slower) var(--ease-default) .1s,transform var(--duration-slower) var(--ease-default) .1s,visibility 0s}.ts-layers{right:auto;bottom:auto;transform-origin:0 0;opacity:0;visibility:hidden;transition:opacity var(--duration-slow) var(--ease-in),visibility 0s linear var(--duration-slow)}.ts-layers[data-shown]{opacity:1;visibility:visible;transition:opacity 0s,visibility 0s}.ts-layers[data-top][data-shown]{transition:opacity var(--duration-slow) var(--ease-default),visibility 0s}@media(max-width:1023.98px),(max-height:599.98px){.ts-zone{inset:calc(var(--caption-band-h) + 12px) 16px calc(100lvh - 100svh + 16px)}.ts-screen>.ts-caption{justify-content:flex-end;padding-bottom:0;clip-path:inset(-100vh -100vw 0 -100vw)}}.ts-figure-copy .t-chapter{text-wrap:wrap}.ts-figure-copy>.t-lede+.t-chapter{margin-top:20px}.ts-shot{position:relative;width:min(100%,860px);margin-bottom:40px}.ts-shot>.ts-shot__runner{height:clamp(360px,56vh,560px)}.ts-shot>.ts-shot__card{position:absolute;right:0;bottom:-40px;width:min(340px,46%);height:auto;box-shadow:0 0 0 1px var(--frame-hairline),var(--frame-shadow)}@media(max-width:767.98px){.ts-shot{display:grid;gap:16px;margin-bottom:0}.ts-shot>.ts-shot__runner{height:clamp(300px,48vh,420px)}.ts-shot>.ts-shot__card{position:relative;right:auto;bottom:auto;width:100%}}.ts-layers-shot{width:min(100%,768px)}.ts-soon-shot{width:min(100%,784px)}@property --hero-grow{syntax: "<number>"; inherits: false; initial-value: 0;}@property --hero-rise{syntax: "<number>"; inherits: false; initial-value: 0;}@property --hero-shadow{syntax: "<number>"; inherits: false; initial-value: 1;}@property --eyebrow{syntax: "<number>"; inherits: false; initial-value: 0;}@property --toolbar-in{syntax: "<number>"; inherits: false; initial-value: 0;}@property --chrome-out{syntax: "<number>"; inherits: false; initial-value: 1;}@property --caption-out{syntax: "<number>"; inherits: false; initial-value: 1;}@property --win-x{syntax: "<length-percentage>"; inherits: false; initial-value: 0px;}@property --win-y{syntax: "<length-percentage>"; inherits: false; initial-value: 0px;}@property --win-s{syntax: "<number>"; inherits: false; initial-value: 1;}@property --win-radius{syntax: "<length>"; inherits: false; initial-value: 0px;}@property --win-clip{syntax: "*"; inherits: false;}.tutor-stage{--hero-card-s: .74;--hero-card-top: calc(47svh - var(--header-h));position:absolute;inset:0;overflow:clip;background-color:var(--story-bg)}@media(min-width:1024px)and (max-height:820px){.tutor-stage{--hero-card-top: calc(51svh - var(--header-h))}}@media(max-width:1023.98px),(max-height:599.98px){.tutor-stage{--hero-card-s: .9;--hero-card-top: calc(55svh - var(--header-h))}}@media(max-width:360px){.tutor-stage{--hero-card-s: .92;--hero-card-top: calc(65svh - var(--header-h))}}.tutor-window,.tutor-hero-shadow{--win-s: calc(var(--hero-card-s) + (1 - var(--hero-card-s)) * var(--hero-grow));--win-x: calc((1 - var(--win-s)) * 50%);--win-y: calc(var(--hero-card-top) * (1 - var(--hero-rise)));--win-radius: calc(var(--radius-board-card) * (1 - var(--hero-grow)) / var(--win-s));--win-clip: inset(0 round var(--win-radius))}.tutor-stage[data-snap] *{transition:none!important}.tutor-stage[data-snap] .tutor-chrome *{animation-duration:0s!important}.tutor-stage__card-probe{position:absolute;top:var(--hero-card-top);left:0;width:0;height:0;visibility:hidden;pointer-events:none}.tutor-hero-shadow{position:absolute;inset:0;border-radius:var(--win-radius);box-shadow:var(--shadow-product-lg);opacity:var(--hero-shadow);transform-origin:0 0;transform:translate(var(--win-x),var(--win-y)) scale(var(--win-s));pointer-events:none}.scroll-stage[data-active] .tutor-hero-shadow{will-change:transform,opacity}.tutor-chrome{--chrome-cx: 66cqw;--dock-x: calc(var(--gutter) + 16px);--dock-y: 32px;--dock-bottom: 128px;position:absolute;inset:0;z-index:2;container-type:size;opacity:var(--chrome-out);pointer-events:none}@media(max-width:1023.98px),(max-height:599.98px){.tutor-chrome{--chrome-cx: 50cqw}}@media(max-width:599px){.tutor-chrome{--dock-bottom: 104px}}.tutor-toolbar-slot{position:absolute;inset:0;opacity:var(--toolbar-in);transform:translate3d(0,calc((1 - var(--toolbar-in)) * 24px),0)}.tutor-caption{z-index:3;padding-top:148px;opacity:var(--caption-out)}.tutor-caption__eyebrow{opacity:var(--eyebrow)}.tutor-caption__scrim{display:none}.tutor-beat{display:grid;align-content:start;gap:14px}.beat-title__sentence{display:inline-block}.copy-short{display:none}@media(max-width:360px){.copy-long{display:none}.copy-short{display:inline}}.tutor-ladder-slot{margin-top:6px}.tutor-ladder{display:grid;gap:10px}.tutor-ladder__chips{display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none}.tutor-ladder__chip{padding:5px 11px;border-radius:var(--radius-pill);box-shadow:inset 0 0 0 1px var(--color-neutral-300);color:var(--color-neutral-700);font-size:13px;font-weight:600;line-height:18px;white-space:nowrap;transition:background-color var(--duration-ui) var(--ease-out),box-shadow var(--duration-ui) var(--ease-out),color var(--duration-ui) var(--ease-out)}:is(.tutor-stage[data-ladder="1"],.tutor-stage[data-ladder="2"],.tutor-ladder[data-lit="1"],.tutor-ladder[data-lit="2"]) .tutor-ladder__chip[data-tier="1"],:is(.tutor-stage[data-ladder="2"],.tutor-ladder[data-lit="2"]) .tutor-ladder__chip[data-tier="2"]{background-color:var(--color-interactive-primary);box-shadow:inset 0 0 0 1.5px var(--color-accent);color:var(--color-neutral-900)}.tutor-ladder__caption{color:var(--story-muted);font-size:14px;line-height:1.4}.tutor-stage .tutor-ladder__caption{opacity:0;transition:opacity var(--duration-ui) var(--ease-out)}.tutor-stage[data-ladder="2"] .tutor-ladder__caption{opacity:1}@media(max-width:1023.98px),(max-height:599.98px){.tutor-caption{gap:4px;padding-top:16px}.tutor-caption__scrim{display:block;position:absolute;inset:0 calc(-1 * var(--gutter)) -28px;z-index:-1;background:linear-gradient(to bottom,var(--color-whiteboard-bg) calc(100% - 28px),color-mix(in srgb,var(--color-whiteboard-bg) 0%,transparent));opacity:var(--eyebrow)}.tutor-beat{gap:6px}.tutor-ladder-slot{margin-top:4px}.tutor-ladder{gap:0}.tutor-ladder__chips{flex-wrap:nowrap;gap:4px}.tutor-ladder__chip{padding:3px 8px;font-size:11px;line-height:16px}.tutor-ladder__caption{display:none}}@media(max-width:360px){.tutor-ladder__chips{flex-wrap:wrap;gap:3px}.tutor-ladder__chip{padding:2px 6px;font-size:11px}}.figure-copy .tutor-ladder__chips{flex-wrap:wrap}.tutor-figures{padding-top:40px}html:not([data-motion=full]) #story-a{display:flex;flex-direction:column;padding-bottom:clamp(80px,10vw,140px)}html:not([data-motion=full]) #story-a>.tutor-figures{display:contents}html:not([data-motion=full]) #story-a .tutor-figure{order:3;margin-top:clamp(64px,9vw,120px)}html:not([data-motion=full]) #story-a .tutor-figure--first{order:1;margin-top:40px}html:not([data-motion=full]) #story-a>#tutor{position:static;order:2;margin-top:clamp(64px,9vw,120px);scroll-margin-top:calc(var(--header-h) + 32px)}html:not([data-motion=full]) #story-a .tutor-figure--first+.tutor-figure{margin-top:0}.tutor-figure__card{container-type:size}.tutor-figure .figure-copy{gap:28px}.tutor-still-beat{display:grid;gap:10px}.figure-copy .tutor-ladder{margin-top:-12px}.tutor-figure .tp--figure .tp-dock{top:20px;bottom:auto;left:36px}.tutor-figure .tp--figure .tp-hint{font-size:min(var(--tp-font, 20px),max(14px,4.4cqw))}@media(max-width:1023.98px),(max-height:599.98px){.tutor-figure .tp--figure .tp-dock{top:auto;bottom:28px;left:calc(50cqw - var(--tp-dock-w) / 2)}.tutor-figure--a3{container-type:inline-size}.tutor-figure--a3 .figure-card{width:100%;min-width:0;height:max(clamp(360px,60vh,640px),100cqi * 1010 / 960)}}/*! 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;--tw-border-style:solid;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-ease:initial}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "Inter", Helvetica, Arial, sans-serif;--font-mono:"SF Mono", ui-monospace, Menlo, Consolas, monospace;--color-red-50:#fef2f2;--color-red-100:#fee2e2;--color-red-200:#fecaca;--color-red-300:#fca5a5;--color-red-400:#f87171;--color-red-500:#ef4444;--color-red-600:#dc2626;--color-red-700:#b91c1c;--color-red-800:#991b1b;--color-red-900:#7f1d1d;--color-amber-50:#fffbeb;--color-amber-100:#fef3c7;--color-amber-200:#fde68a;--color-amber-300:#fcd34d;--color-amber-400:#fbbf24;--color-amber-500:#f59e0b;--color-amber-600:#d97706;--color-amber-700:#b45309;--color-amber-800:#92400e;--color-amber-900:#78350f;--color-green-50:#ecfdf5;--color-green-100:#d1fae5;--color-green-200:#a7f3d0;--color-green-300:#6ee7b7;--color-green-400:#34d399;--color-green-500:#10b981;--color-green-600:#059669;--color-green-700:#047857;--color-green-800:#065f46;--color-green-900:#064e3b;--color-neutral-100:#f5f4f1;--color-neutral-200:#e6e3dc;--color-neutral-300:#d7d3ca;--color-neutral-400:#b0b0a0;--color-neutral-500:#8a8a80;--color-neutral-600:#7b7770;--color-neutral-700:#4a4742;--color-neutral-800:#222;--color-neutral-900:#1a1a1a;--color-neutral-950:#111;--color-white:#fff;--container-sm:640px;--container-md:768px;--container-lg:1024px;--container-xl:1200px;--text-xs:.75rem;--text-sm:.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--tracking-tight:-.02em;--tracking-normal:0em;--tracking-wide:.025em;--leading-tight:1.1;--leading-snug:1.25;--leading-normal:1.5;--leading-relaxed:1.625;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-2xl:20px;--radius-3xl:24px;--shadow-xs:0 1px 2px 0 #00000008;--shadow-sm:0 1px 3px 0 #0000000a, 0 1px 2px -1px #00000008;--shadow-md:0 4px 6px -1px #0000000d, 0 2px 4px -2px #00000008;--shadow-lg:0 10px 15px -3px #0000000d, 0 4px 6px -4px #00000008;--ease-in:cubic-bezier(.4, 0, 1, 1);--ease-out:cubic-bezier(0, 0, .2, 1);--ease-in-out:cubic-bezier(.4, 0, .2, 1);--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);--font-math:"KaTeX_Main", "Times New Roman", serif;--font-math-italic:"KaTeX_Math", "Times New Roman", serif;--color-neutral-000:#fff;--color-neutral-050:#fcfcfb;--color-neutral-1000:#000;--color-lavender-50:#fdf5ff;--color-lavender-100:#f8e6ff;--color-lavender-200:#f0d7ff;--color-lavender-300:#e4bfff;--color-lavender-400:#d4a0ff;--color-lavender-500:#c080ff;--color-lavender-600:#a855f7;--color-lavender-700:#a36ec1;--color-lavender-800:#6d2fa7;--color-lavender-900:#7232a6;--color-surface-base:var(--color-white);--color-surface-subtle:var(--color-neutral-050);--color-surface-muted:var(--color-neutral-100);--color-surface-paper:var(--color-neutral-050);--color-surface-cream:var(--color-neutral-100);--color-surface-cream-deep:var(--color-neutral-200);--color-frame-hairline-paper:#1a1a1a0f;--color-frame-hairline-cream:#3c321e14;--color-text-primary:var(--color-neutral-900);--color-text-secondary:var(--color-neutral-800);--color-text-muted:var(--color-neutral-500);--color-text-disabled:var(--color-neutral-400);--color-border-subtle:#1a1a1a1a;--color-border-default:var(--color-neutral-200);--color-border-strong:var(--color-neutral-300);--color-interactive-primary:var(--color-lavender-200);--color-interactive-primary-hover:var(--color-lavender-300);--color-status-success:var(--color-green-500);--color-status-success-subtle:var(--color-green-50);--color-status-warning:var(--color-amber-500);--color-status-warning-subtle:var(--color-amber-50);--color-status-error:var(--color-red-500);--color-status-error-subtle:var(--color-red-50);--color-status-info-bg:#dbeafe;--color-status-info-fg:#1e40af;--color-status-neutral-bg:#f5f5f5;--color-status-neutral-fg:#525252;--color-status-warning-bg:#fff7e6;--color-status-warning-fg:#f5a623;--color-status-success-bg:#e8f5e9;--color-status-success-fg:#43a047;--color-status-error-bg:#ffebee;--color-status-error-fg:#e53935;--color-warning-warm:#f4d35e;--color-product-error:#ef4848;--color-tutor-hint:#7c3aad;--color-tutor-hint-halo:#a764c866;--color-notebook-canvas:#f5f4f1;--color-notebook-paper:#fff;--color-notebook-muted:#78756f;--color-notebook-line:#e5e2db;--color-notebook-ink:#242424;--color-notebook-accent:#8862ba;--color-notebook-record:#c74b46;--color-report-solved:#14a395;--color-report-unfinished:var(--color-lavender-700);--color-report-out-of-turns:#ff5a7d;--color-report-misconception:#a36ec1;--color-turn-misconception:#ad52a6;--color-turn-error:#ef4848;--color-turn-on-track:#5abdb0;--color-turn-on-track-text:#10756e;--color-turn-solved:#14a395;--color-turn-idle:#c8c4bb;--color-cream-muted:#f0efea;--color-whiteboard-bg:#f5f4f1;--color-board-dot:#7b77704d;--color-ink-500:#3a4ec8;--color-ink-student:var(--color-neutral-1000);--color-ink-tutor:var(--color-ink-500);--color-tutor-underline:#ad52a6;--color-tutor-highlight:#57c3db;--color-accent:var(--color-lavender-700);--color-misconception:var(--color-report-misconception);--color-erasing:var(--color-turn-idle);--color-error-warm:var(--color-report-out-of-turns);--color-product-success:var(--color-report-solved);--text-display:clamp(38px, calc(4.95vw + 24.7px) , 96px);--text-display--line-height:1.04;--text-display--letter-spacing:-.02em;--text-display--font-weight:600;--text-chapter:clamp(28px, calc(2.29vw + 23.1px) , 56px);--text-chapter--line-height:1.08;--text-chapter--letter-spacing:-.015em;--text-chapter--font-weight:600;--text-lede:clamp(17px, calc(.38vw + 15.5px) , 21px);--text-lede--line-height:1.35;--text-lede--font-weight:600;--text-body:17px;--text-body--line-height:1.5;--text-eyebrow:15px;--text-eyebrow--line-height:1.3;--text-eyebrow--font-weight:600;--text-h3:clamp(24px, calc(.76vw + 21px) , 32px);--text-h3--line-height:1.15;--text-h3--letter-spacing:-.01em;--text-h3--font-weight:600;--leading-none:1;--radius-none:0px;--radius-board-card:28px;--radius-pill:1000px;--radius-full:9999px;--shadow-product-sm:0 1px 2px #0000000f;--shadow-product-md:0 8px 24px #0000001a;--shadow-product-lg:0 20px 60px #0000002e;--shadow-frame-cream:0 24px 64px -16px #3c321e2e;--shadow-underline:0 2px 4px #ad52a64d;--duration-instant:0s;--duration-fast:.12s;--duration-normal:.2s;--duration-slow:.3s;--duration-slower:.4s;--duration-ui:.3s;--duration-dock:.9s;--duration-reveal-move:.7s;--duration-reveal:.8s;--stagger-reveal:.15s;--ease-default:cubic-bezier(.2, 0, 0, 1);--ease-reveal:cubic-bezier(0, 0, .5, 1);--ease-dock:cubic-bezier(.32, .72, 0, 1);--container-content:1320px}}@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%;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]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}*,:before,:after{box-sizing:border-box}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;position:relative}body{font-family:var(--font-sans);font-size:var(--text-body);line-height:var(--text-body--line-height);color:var(--color-text-primary);background:linear-gradient(var(--color-surface-paper) 10%,var(--color-surface-cream) 10%);margin:0}@media(max-width:767.98px){body{font-size:16px}}h1,h2,h3,h4,h5,h6{font-family:var(--font-sans);margin:0;font-weight:600}p{margin:0}img,svg,video{max-width:100%;display:block}img,video{height:auto}a{color:inherit}:focus-visible{outline:2px solid var(--focus-ring,var(--color-accent));outline-offset:2px}@media(prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}}@layer components;@layer utilities{.collapse{visibility:collapse}.invisible{visibility:hidden}.visible{visibility:visible}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.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}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.shrink{flex-shrink:1}.grow{flex-grow:1}.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}.rounded{border-radius:.25rem}.border{border-style:var(--tw-border-style);border-width:1px}.text-wrap{text-wrap:wrap}.uppercase{text-transform:uppercase}.italic{font-style:italic}.underline{text-decoration-line:underline}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.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))}.ease-in{--tw-ease:var(--ease-in);transition-timing-function:var(--ease-in)}.ease-out{--tw-ease:var(--ease-out);transition-timing-function:var(--ease-out)}}:root{--z-stage-a:1;--z-stage-b:2;--z-curtain:3;--z-header:10;--z-skip-link:11;--content-max:1320px;--header-h:56px;--gutter:20px}@media(max-width:360px){:root{--gutter:16px}}@media(min-width:768px){:root{--gutter:32px}}@media(min-width:1024px){:root{--header-h:64px;--gutter:60px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}:root,[data-surface]{--story-bg: var(--color-surface-paper);--story-fg: var(--color-neutral-900);--story-hl: var(--color-neutral-900);--story-muted: var(--color-neutral-700);--story-eyebrow: var(--color-neutral-700);--story-hairline: var(--color-border-subtle);--frame-hairline: var(--color-frame-hairline-paper);--frame-shadow: var(--shadow-product-lg);--cta-bg: var(--color-neutral-950);--cta-bg-hover: var(--color-neutral-800);--cta-fg: var(--color-white)}[data-surface=cream],[data-surface=cream-deep]{--story-bg: var(--color-surface-cream);--frame-hairline: var(--color-frame-hairline-cream);--frame-shadow: var(--shadow-frame-cream)}[data-surface=cream-deep]{--story-bg: var(--color-surface-cream-deep)}[data-surface]{background-color:var(--story-bg);color:var(--story-fg)}main{overflow-x:clip}main [id],footer[id]{scroll-margin-top:var(--header-h)}.page-width{width:min(100% - 2 * var(--gutter),var(--content-max));margin-inline:auto}.t-display{font-size:var(--text-display);line-height:var(--text-display--line-height);letter-spacing:var(--text-display--letter-spacing);font-weight:600;text-wrap:balance}.t-chapter{font-size:var(--text-chapter);line-height:var(--text-chapter--line-height);letter-spacing:var(--text-chapter--letter-spacing);font-weight:600;text-wrap:balance}.t-lede{font-size:var(--text-lede);line-height:var(--text-lede--line-height);font-weight:600;color:var(--story-muted);text-wrap:balance}.hl{color:var(--story-hl)}.t-body{font-size:var(--text-body);line-height:var(--text-body--line-height)}.t-eyebrow{font-size:var(--text-eyebrow);line-height:var(--text-eyebrow--line-height);font-weight:600;color:var(--story-eyebrow)}.t-h3{font-size:var(--text-h3);line-height:var(--text-h3--line-height);letter-spacing:var(--text-h3--letter-spacing);font-weight:600;text-wrap:balance}.t-note{font-size:15px;line-height:1.4;color:var(--story-muted)}@media(max-width:767.98px){.t-body{font-size:16px}}.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px 28px}.btn-primary{display:inline-flex;align-items:center;justify-content:center;height:52px;padding:0 28px;border-radius:var(--radius-pill);background-color:var(--cta-bg);color:var(--cta-fg);font-size:17px;font-weight:600;line-height:1;letter-spacing:-.005em;white-space:nowrap;text-decoration:none;transition:background-color var(--duration-fast) var(--ease-default),transform var(--duration-fast) var(--ease-default)}.btn-primary:hover{background-color:var(--cta-bg-hover)}.btn-primary:active{transform:scale(.98)}.btn-primary.btn-sm{height:36px;padding:0 16px;font-size:14px}.site-header .btn-sm{position:relative}.site-header .btn-sm:before{content:"";position:absolute;inset:-4px -2px}.btn-link{display:inline-flex;align-items:center;gap:6px;height:52px;color:var(--story-fg);font-size:17px;font-weight:600;line-height:1;white-space:nowrap;text-decoration:none;text-underline-offset:4px}.btn-link:after{content:"→" / "";transition:transform var(--duration-normal) var(--ease-default)}.btn-link:hover{text-decoration:underline}.btn-link:hover:after{transform:translate(3px)}@media(max-width:767.98px){.btn-primary,.btn-link{height:48px}.btn-primary:not(.btn-sm){padding:0 24px}}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip-link{position:fixed;top:8px;left:8px;z-index:var(--z-skip-link);padding:10px 16px;border-radius:var(--radius-pill);background-color:var(--color-white);box-shadow:var(--shadow-product-md);color:var(--color-neutral-900);font-size:15px;font-weight:600;text-decoration:none;transform:translateY(calc(-100% - 48px));transition:transform var(--duration-normal) var(--ease-out)}.skip-link:focus{transform:none}.site-header{--header-surface: var(--color-surface-paper);position:fixed;inset:0 0 auto;z-index:var(--z-header);height:var(--header-h);color:var(--color-neutral-900);background-color:color-mix(in srgb,var(--header-surface) 80%,transparent);-webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);box-shadow:inset 0 -1px 0 var(--color-border-subtle);transition:background-color var(--duration-slow) var(--ease-default),color var(--duration-slow) var(--ease-default),box-shadow var(--duration-slow) var(--ease-default)}html[data-motion=static] .site-header{position:absolute}html[data-motion=static] :is(main [id],footer[id]){scroll-margin-top:0}html[data-header-theme=paper] .site-header{--header-surface: var(--color-surface-paper)}html[data-header-theme=cream] .site-header{--header-surface: var(--color-surface-cream)}html[data-header-theme=cream-deep] .site-header{--header-surface: var(--color-surface-cream-deep)}.site-header__inner{display:flex;align-items:center;gap:16px;height:100%}.site-brand{display:inline-flex;align-items:center;gap:9px;min-width:44px;min-height:44px;margin-right:auto;color:inherit;font-size:19px;font-weight:600;letter-spacing:-.015em;text-decoration:none}.site-brand svg{width:26px;height:28px;flex:none}.site-nav{display:none}.site-nav a,.site-signin{display:inline-flex;align-items:center;min-height:44px;color:color-mix(in srgb,currentColor 72%,transparent);font-size:14px;font-weight:500;text-decoration:none;white-space:nowrap;transition:color var(--duration-fast) var(--ease-default)}.site-nav a:hover,.site-signin:hover{color:inherit}.site-signin{display:none}.site-menu{position:relative}.site-menu>summary{display:grid;place-items:center;width:44px;height:44px;margin-right:-10px;border-radius:var(--radius-pill);cursor:pointer;list-style:none}.site-menu>summary::-webkit-details-marker{display:none}.menu-icon{display:grid;gap:6px;width:18px}.menu-icon span{display:block;height:1.5px;border-radius:1px;background-color:currentColor;transition:transform var(--duration-normal) var(--ease-default)}.site-menu[open] .menu-icon span:first-child{transform:translateY(3.75px) rotate(45deg)}.site-menu[open] .menu-icon span:last-child{transform:translateY(-3.75px) rotate(-45deg)}.site-menu__panel{position:fixed;inset:var(--header-h) 0 auto;display:grid;padding:12px var(--gutter) 28px;color:var(--color-neutral-900);background-color:var(--header-surface);box-shadow:inset 0 1px 0 var(--color-border-subtle),var(--shadow-product-md)}.site-menu__panel a{padding:12px 0;color:inherit;font-size:24px;font-weight:600;letter-spacing:-.015em;text-decoration:none}.site-menu__panel a+a{box-shadow:inset 0 1px 0 var(--color-border-subtle)}@media(max-width:360px){.site-brand__word{display:none}}@media(min-width:1024px){.site-header__inner{gap:28px}.site-brand{margin-right:0}.site-nav{display:flex;flex:1;justify-content:center;gap:32px}.site-signin{display:inline-flex}.site-menu{display:none}}.site-footer{padding-block:24px 32px;box-shadow:inset 0 1px 0 var(--story-hairline)}.site-footer__row{display:flex;flex-wrap:wrap;align-items:center;gap:0 28px}.site-footer .site-brand{margin-right:auto;font-size:17px}.site-footer .site-brand svg{width:22px;height:24px}.site-footer__links{display:flex;flex-wrap:wrap;align-items:center;gap:0 24px;font-size:14px}.site-footer__links a{display:inline-flex;align-items:center;min-height:44px;color:inherit;font-weight:500;text-decoration:none;text-underline-offset:3px}.site-footer__links a:hover{text-decoration:underline}.site-footer__copy{color:var(--story-muted)}.site-footer__note{max-width:760px;margin-top:10px;color:var(--story-muted);font-size:13px;line-height:1.5}@media(max-width:767.98px){.site-footer .site-brand{flex-basis:100%}}.scroll-stage{position:relative}.scroll-stage[data-layer=a]{z-index:var(--z-stage-a)}.scroll-stage[data-layer=b]{z-index:var(--z-stage-b)}.stage-screen{display:none}html[data-motion=full] .scroll-stage{--stage-l: var(--stage-l-desktop);height:calc((1 + var(--stage-head, 0) + var(--stage-l) + var(--stage-tail, 0)) * 100lvh);padding-top:var(--header-h)}@media(max-width:1023.98px),(max-height:599.98px){html[data-motion=full] .scroll-stage{--stage-l: var(--stage-l-phone)}}html[data-motion=full] .stage-screen{display:block;position:sticky;top:var(--header-h);height:calc(100lvh - var(--header-h));overflow:clip}html[data-motion=full] .stage-figures{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}html[data-motion=full] .stage-overlap{margin-top:-100lvh}.stage-anchor{position:absolute;top:0;left:0;width:1px;height:0;pointer-events:none}html[data-motion=full] main .stage-anchor{top:calc((var(--stage-head, 0) + var(--anchor-p, 0) * var(--stage-l)) * 100lvh);scroll-margin-top:0}.stage-screen{--caption-band-h: min(200px, 25svh)}.stage-caption{position:absolute;inset:0 auto 0 var(--gutter);z-index:3;display:flex;flex-direction:column;justify-content:center;gap:18px;width:min(460px,34vw - var(--gutter));pointer-events:none}.stage-beats{display:grid}.stage-beats>*{grid-area:1 / 1}.stage-beat{display:grid;align-content:start;gap:14px}.scroll-stage[data-active] .stage-beat{will-change:transform,opacity}.beat-title{font-size:var(--text-chapter);line-height:var(--text-chapter--line-height);letter-spacing:var(--text-chapter--letter-spacing);font-weight:600;text-wrap:balance}.beat-sub{font-size:var(--text-lede);line-height:var(--text-lede--line-height);font-weight:600;color:var(--story-muted);text-wrap:pretty}.stage-zone{position:absolute;inset:8% 4% 0 36%}@media(max-width:1023.98px),(max-height:599.98px){.stage-caption{inset:0 var(--gutter) auto;justify-content:flex-start;gap:6px;width:auto;height:var(--caption-band-h);padding-top:16px}.stage-beat{gap:6px}.beat-title{font-size:clamp(28px,calc(2.6vw + 20px),40px);line-height:1.1}.beat-sub{font-size:clamp(16px,calc(.5vw + 14px),19px);line-height:1.35}.stage-zone{inset:calc(var(--caption-band-h) + 16px) 16px 0}}@media(max-width:360px){.beat-title{font-size:28px}}.stage-figures{display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(64px,9vw,120px);padding-block:56px clamp(80px,10vw,140px)}.stage-figure{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;width:min(1100px,100% - 2 * var(--gutter));margin-inline:auto}.figure-copy{display:grid;gap:12px;max-width:760px}.figure-card{position:relative;height:clamp(220px,min(60vh,calc(100svh - var(--header-h) - 48px)),640px);overflow:clip;border-radius:var(--radius-board-card);background-color:var(--color-whiteboard-bg);box-shadow:var(--shadow-product-lg)}@media(max-height:520px)and (min-width:600px){.stage-figure{grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:center}}.curtain{--curtain-hold: .3;position:relative;z-index:var(--z-curtain);display:grid;place-items:center;min-height:100lvh;padding:var(--header-h) var(--gutter) 0;text-align:center}html[data-motion=full] .curtain{display:block;height:calc((1 + var(--curtain-hold)) * 100lvh);margin-top:-100lvh;padding:0}html[data-motion=full] .curtain__screen{position:sticky;top:0;display:grid;place-items:center;height:100lvh;padding:var(--header-h) var(--gutter) 0}html[data-motion=full][data-reveal-ready] [data-reveal]{transition:opacity var(--duration-reveal) var(--ease-reveal),transform var(--duration-reveal-move) var(--ease-reveal);transition-delay:calc(var(--reveal-index, 0) * var(--stagger-reveal))}html[data-motion=full][data-reveal-ready] [data-reveal]:not([data-inview]){opacity:0;transform:translate3d(0,30px,0)}html[data-motion=full][data-reveal-ready] [data-reveal=scale]:not([data-inview]){transform:scale(.96)}.swipe{--swipe-gradient: linear-gradient( 90deg, var(--story-hl) 0 33.33%, var(--story-muted) 66.67% 100% )}html[data-motion=full][data-reveal-ready] :is([data-swipe] .swipe,.swipe[data-swipe]){background-image:var(--swipe-gradient);background-size:300% 100%;background-position:100% 0;-webkit-background-clip:text;background-clip:text;color:transparent;transition:background-position var(--swipe-duration, 1.2s) linear}html[data-motion=full][data-reveal-ready] :is([data-swipe][data-inview] .swipe,.swipe[data-swipe][data-inview]){background-position:0 0}.wordfill .wf-line{display:block}@supports (animation-timeline: view()){html[data-motion=full] .wordfill[data-timeline=self]{view-timeline:--fill block}html[data-motion=full] .wordfill .wf-w{animation:wf-fill linear both;animation-timeline:--fill;animation-range:cover calc(20% + var(--i) / var(--n) * 30%) cover calc(23% + var(--i) / var(--n) * 30%)}}@keyframes wf-fill{0%{opacity:.25}to{opacity:1}}