@layer legacy,frame,layouts,teaching,atelier;@layer legacy{.ann{--ann-color: oklch(.62 .005 30);--ann-mark: light-dark(color-mix(in oklch, var(--ann-color) 10%, transparent), oklch(from var(--ann-color) l calc(c*1.35) h / 24%));--ann-font: "Shantell Sans", cursive;--ann-target-gap: 5px;--ann-label-gap: 6px;--ann-lower-label-gap: -4px;--ann-label-max-width: 150px;--ann-arrow-x: 0px;--ann-text-x: 0px;--ann-arrow-y: 0px;--ann-text-y: 5px;--ann-rotate: -4deg;position:relative;display:inline-block;overflow:visible;line-height:1.15;border-radius:3px;background:var(--ann-mark);box-shadow:-.3em 0 0 0 var(--ann-mark),.3em 0 0 0 var(--ann-mark)}.ann:after{content:attr(data-note);position:absolute;z-index:4;width:max-content;max-width:var(--ann-label-max-width);transform:rotate(var(--ann-rotate));font-family:var(--ann-font);font-size:.95rem;font-weight:400;line-height:1.05;color:var(--ann-color);opacity:.9;white-space:normal;overflow-wrap:anywhere;pointer-events:none}.ann:before{content:"";position:absolute;z-index:3;width:46px;height:38px;transform-origin:50% 50%;-webkit-mask:var(--_ann-arrow-mask) center / contain no-repeat;mask:var(--_ann-arrow-mask) center / contain no-repeat;background:var(--ann-color);opacity:.9;pointer-events:none}.ann:not([data-note]):before,.ann:not([data-note]):after,.ann[data-note=""]:before,.ann[data-note=""]:after{display:none}.ann-amber{--ann-color: #b8751a;--ann-mark: light-dark(color-mix(in oklch, #ffb000 14%, transparent), color-mix(in oklch, #ffb000 22%, transparent))}.ann-blue{--ann-color: #3b72c4}.ann-green{--ann-color: #2f8f5b}.ann-red{--ann-color: #c45a38}.ann-purple{--ann-color: #8657c8}.ann-rainbow{--ann-color: oklch(.65 .28 var(--ann-rainbow-hue, 350deg))}.ann-no-mark{--ann-mark: transparent}@property --ann-rainbow-hue{syntax: "<angle>"; inherits: false; initial-value: 350deg;}@keyframes ann-rainbow-cycle{to{--ann-rainbow-hue: 710deg}}@media (prefers-reduced-motion: no-preference){.ann-rainbow{animation:ann-rainbow-cycle 3s linear infinite}}@media (forced-colors: active){.ann:before{background:CanvasText;forced-color-adjust:none}}.ann-n:before{left:calc(50% - 23px + var(--ann-arrow-x));top:calc(100% + var(--ann-target-gap) - 4px + var(--ann-arrow-y));--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M23 35 C22 26 22 15 23 4' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M17 10 L23 3 L29 10' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-n:after{left:calc(50% + var(--ann-text-x));top:calc(100% + var(--ann-target-gap) + 31px + var(--ann-lower-label-gap) + var(--ann-text-y));transform:translate(-50%) rotate(var(--ann-rotate))}.ann-ne:before{left:calc(50% - 40px + var(--ann-arrow-x));top:calc(100% + var(--ann-target-gap) - 6px + var(--ann-arrow-y));transform:translate(-10%);--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 32 C16 30 28 18 40 6' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M30 10 L40 6 L36 16' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-ne:after{left:calc(50% - 34px + var(--ann-text-x));top:calc(100% + var(--ann-target-gap) + 26px + var(--ann-lower-label-gap) + var(--ann-text-y));transform:translate(-60%) rotate(var(--ann-rotate))}.ann-e:before{left:calc(-1 * var(--ann-target-gap) - 43px + var(--ann-arrow-x));top:calc(50% - 19px + var(--ann-arrow-y));--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M4 19 C15 18 31 18 43 19' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M36 13 L43 19 L36 25' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-e:after{right:calc(100% + var(--ann-target-gap) + 39px + var(--ann-label-gap) - var(--ann-text-x));top:calc(50% - 5px + var(--ann-text-y));transform:translateY(-50%) rotate(var(--ann-rotate))}.ann-se:before{left:calc(50% - 40px + var(--ann-arrow-x));top:calc(-1 * var(--ann-target-gap) - 32px + var(--ann-arrow-y));transform:translate(-10%);--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 6 C16 8 28 20 40 32' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M36 22 L40 32 L30 28' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-se:after{left:calc(50% - 34px + var(--ann-text-x));bottom:calc(100% + var(--ann-target-gap) + 26px + var(--ann-label-gap) - var(--ann-text-y));transform:translate(-60%) rotate(var(--ann-rotate))}.ann-s:before{left:calc(50% - 23px + var(--ann-arrow-x));top:calc(-1 * var(--ann-target-gap) - 35px + var(--ann-arrow-y));--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M23 4 C22 13 22 24 23 35' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M17 29 L23 36 L29 29' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-s:after{left:calc(50% + var(--ann-text-x));bottom:calc(100% + var(--ann-target-gap) + 31px + var(--ann-label-gap) - var(--ann-text-y));transform:translate(-50%) rotate(var(--ann-rotate))}.ann-sw:before{left:calc(50% - 6px + var(--ann-arrow-x));top:calc(-1 * var(--ann-target-gap) - 32px + var(--ann-arrow-y));transform:translate(10%);--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M40 6 C30 8 18 20 6 32' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M10 22 L6 32 L16 28' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-sw:after{left:calc(50% + 34px + var(--ann-text-x));bottom:calc(100% + var(--ann-target-gap) + 26px + var(--ann-label-gap) - var(--ann-text-y));transform:translate(-40%) rotate(var(--ann-rotate))}.ann-w:before{left:calc(100% + var(--ann-target-gap) - 3px + var(--ann-arrow-x));top:calc(50% - 19px + var(--ann-arrow-y));--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M43 19 C32 18 15 18 3 19' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M10 13 L3 19 L10 25' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-w:after{left:calc(100% + var(--ann-target-gap) + 40px + var(--ann-label-gap) + var(--ann-text-x));top:calc(50% - 5px + var(--ann-text-y));transform:translateY(-50%) rotate(var(--ann-rotate))}.ann-nw:before{left:calc(50% - 6px + var(--ann-arrow-x));top:calc(100% + var(--ann-target-gap) - 6px + var(--ann-arrow-y));transform:translate(10%);--_ann-arrow-mask: url("data:image/svg+xml,%3Csvg width='46' height='38' viewBox='0 0 46 38' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M40 32 C30 30 18 18 6 6' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round'/%3E%3Cpath d='M16 10 L6 6 L10 16' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}.ann-nw:after{left:calc(50% + 34px + var(--ann-text-x));top:calc(100% + var(--ann-target-gap) + 26px + var(--ann-lower-label-gap) + var(--ann-text-y));transform:translate(-40%) rotate(var(--ann-rotate))}}@layer legacy{:root{color-scheme:light;--paper: #fffdf8;--ink: #172235;--muted: #68717e;--line: #d8dce2;--red: #d22b37;--red-soft: #f9e2df;--blue: #2f68bd;--blue-soft: #e7effb;--green: #2f865e;--green-soft: #e2f1e8;--amber: #9f6412;--amber-soft: #faedc9;--purple: #7653aa;--sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--hand: "LXGW WenKai Screen", "Kaiti SC", KaiTi, cursive}*{box-sizing:border-box}html,body{width:100%;height:100%;margin:0;overflow:hidden;background:#111722;color:var(--ink);font-family:var(--sans)}body{display:grid;place-items:center}button,dialog{font:inherit}button{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration-color:#d22b3794;text-underline-offset:.16em}.stage{position:relative;width:min(100vw,calc(100dvh * 16 / 9));height:min(100dvh,56.25vw);aspect-ratio:16 / 9;overflow:hidden;container-type:size;background:var(--paper);box-shadow:0 2.2rem 7rem #0000004d}.deck,.slide{position:absolute;top:0;right:0;bottom:0;left:0}.slide{display:none;grid-template-rows:auto minmax(0,1fr) auto;padding:4.1cqh 5.4cqw 2.2cqh;overflow:hidden;background:linear-gradient(90deg,rgb(47 104 189 / 2.5%) 1px,transparent 1px) 0 0 / 6.25cqw 11.1cqh,linear-gradient(rgb(47 104 189 / 2.5%) 1px,transparent 1px) 0 0 / 6.25cqw 11.1cqh,var(--paper)}.slide:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background:radial-gradient(circle at 86% 12%,rgb(255 255 255 / 92%),transparent 28%)}.slide>*{position:relative;z-index:1}.slide.is-active{display:grid}.slide-body{min-width:0;min-height:0;display:grid;align-content:center;position:relative}.slide.is-entering .slide-head,.slide.is-entering .slide-body{animation:enter-up .32s cubic-bezier(.2,.7,.2,1) both}@keyframes enter-up{0%{opacity:0;transform:translateY(1.2cqh)}to{opacity:1;transform:none}}.slide-head{padding-bottom:1.65cqh;margin-bottom:2.4cqh;border-bottom:.18cqh solid var(--line)}.slide-head:after{content:"";position:absolute;left:0;bottom:-.18cqh;width:19cqw;height:.28cqh;background:var(--red);transform:rotate(-.2deg);transform-origin:left center}.section-tag,.cover-kicker,.dialog-kicker{margin:0 0 .7cqh;color:var(--red);font-size:13px;font-size:max(1.02cqw,var(--text-note));font-weight:780;letter-spacing:.12em;text-transform:uppercase}h1,h2,h3,p,blockquote{margin-top:0}h2{max-width:86cqw;margin:0;font-size:40px;font-size:3.12cqw;line-height:1.16;letter-spacing:-.035em}h3{margin:0 0 1.3cqh;font-size:26px;font-size:2.05cqw;line-height:1.2}.slide-body{font-size:22px;font-size:1.72cqw;line-height:1.46}.slide-bottom{align-self:end;min-height:4.7cqh}.source{min-height:1.6cqh;margin:0 0 .6cqh;color:var(--muted);font-size:10.5px;font-size:max(.82cqw,var(--text-note));line-height:1.25}.slide-footer{display:flex;justify-content:space-between;align-items:center;padding-top:.75cqh;border-top:.12cqh solid var(--line);color:var(--muted);font-size:11px;font-size:max(.86cqw,var(--text-note));line-height:1;letter-spacing:.035em}.notes{display:none}.fragment{opacity:0;transform:translateY(.8cqh);transition:opacity .24s ease,transform .3s ease;pointer-events:none}.fragment.is-visible{opacity:1;transform:none;pointer-events:auto}.slide .ann,.slide .rn{--ann-font: var(--hand);--ann-label-max-width: 15cqw}.slide .ann:after{font-size:16px;font-size:max(1.25cqw,var(--text-note));line-height:1.08;font-weight:400}.hand-note{margin:1.6cqh 0 0;color:var(--amber);font-family:var(--hand);font-size:19px;font-size:1.48cqw;transform:rotate(-.6deg)}.takeaway,.warning,.definition{margin:2.5cqh auto 0;padding:1.1cqh 1.4cqw;border-left:.42cqw solid var(--blue);background:#e7effb94;font-size:19px;font-size:1.48cqw;line-height:1.4}.warning{border-left-color:var(--red);background:#f9e2df99}.definition{border-left-color:var(--green);background:#e2f1e8ad;font-weight:690}.muted{color:var(--muted)}.wide{grid-column:1 / -1;width:min(76cqw,100%)}.formula{color:var(--blue);font-family:ui-serif,Georgia,serif;font-size:2.05cqw}.slide-cover{grid-template-rows:auto minmax(0,1fr) auto;padding:7.2cqh 7.2cqw 4.2cqh;background:linear-gradient(90deg,transparent 0 7.8%,rgb(210 43 55 / 12%) 7.8% 8%,transparent 8%),linear-gradient(rgb(47 104 189 / 2.5%) 1px,transparent 1px) 0 0 / 6.25cqw 11.1cqh,var(--paper)}.cover-rule{position:absolute;left:7.2cqw;right:7.2cqw;top:11.4cqh;height:.22cqh;background:var(--red);transform:rotate(-.1deg)}.cover-kicker{align-self:start}.slide-cover .slide-body{align-content:center;grid-template-columns:1fr .42fr;gap:3.6cqw}.cover-copy h1{margin:0;font-size:66px;font-size:5.18cqw;line-height:1.18;letter-spacing:-.06em}.cover-copy>p{margin:3.2cqh 0 0;color:var(--blue);font-size:29px;font-size:2.28cqw;font-weight:720}.cover-question{align-self:end;margin-bottom:7.5cqh;padding:2.2cqh 0 2.2cqh 2cqw;border-left:.35cqw solid var(--amber);font-family:var(--hand);font-size:20px;font-size:1.56cqw;line-height:1.65;transform:rotate(-.8deg)}.cover-footer{padding-top:1.2cqh;font-size:13px;font-size:max(1.02cqw,var(--text-note))}.slide-prompt .slide-body{grid-template-columns:1fr auto;gap:5cqw}.question-stack{display:grid;gap:2.2cqh;align-self:center}.question-stack p{display:grid;grid-template-columns:7cqw 1fr;align-items:center;margin:0;padding-bottom:1.7cqh;border-bottom:.12cqh solid var(--line)}.question-stack b{color:var(--red);font-family:var(--hand);font-size:1.8cqw;font-weight:500}.question-stack span{font-size:2.05cqw;font-weight:500}.slide-prompt .hand-note{align-self:center;max-width:15cqw;font-size:2cqw}.slide-video .slide-head{margin-bottom:1.4cqh}.slide-video .slide-body{grid-template-columns:minmax(0,1fr) 10cqw;gap:2.2cqw;align-content:stretch}.video-shell{min-height:0;display:grid;place-items:center;background:#050609;border:.14cqw solid #111722}.video-shell video{display:block;max-width:100%;max-height:57cqh;width:100%;aspect-ratio:16 / 9;object-fit:contain}.video-watch{display:grid;align-content:center;gap:3cqh;color:var(--red);font-family:var(--hand);font-size:1.7cqw}.video-watch span{padding-bottom:1cqh;border-bottom:.22cqh solid currentColor;transform:rotate(-1deg)}.slide-words .slide-body{align-content:center}.verb-field{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:1.5cqh 1.6cqw;max-width:77cqw;margin:0 auto}.verb-field span{padding:.7cqh .9cqw;border-bottom:.22cqh solid var(--line);font-family:var(--hand);font-size:2.5cqw}.verb-field span:nth-child(3n+1){color:var(--blue);transform:rotate(-1deg)}.verb-field span:nth-child(3n+2){color:var(--green);transform:rotate(.7deg)}.verb-field span:nth-child(3n){color:var(--red);transform:rotate(-.2deg)}.slide-words .takeaway{margin-top:5cqh}.sequence-line{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:1.5cqw}.sequence-line.five{grid-template-columns:repeat(7,auto);justify-content:center}.sequence-line>div{padding:2.2cqh 1.6cqw;border-top:.55cqh solid var(--blue);background:#fff9;text-align:center}.sequence-line b,.sequence-line small{display:block}.sequence-line b{font-size:1.8cqw}.sequence-line small{margin-top:.7cqh;color:var(--muted);font-size:max(1.05cqw,var(--text-note))}.sequence-line i{color:var(--red);font-family:var(--hand);font-size:2.5cqw;font-style:normal}.slide-sequence blockquote{margin:5cqh auto 0;font-family:var(--hand);font-size:1.8cqw}.slide-split .slide-body{grid-template-columns:1fr auto 1fr;align-items:center;gap:2.8cqw}.column{min-height:28cqh;padding:3cqh 2.4cqw;border-top:.65cqh solid var(--line)}.column.accent{border-top-color:var(--blue)}.column h3{font-size:2.6cqw}.column p{margin:1.8cqh 0 0}.bridge-arrow{color:var(--red);font-family:var(--hand);font-size:4cqw}.fork-diagram{display:grid;grid-template-columns:15cqw 1fr 1fr 17cqw;grid-template-rows:auto auto;gap:2cqh 2cqw;align-items:center}.fork-start{grid-row:1 / span 2;padding:3cqh 1cqw;border:.2cqw solid var(--ink);text-align:center;font-weight:760}.fork-path{padding:2cqh 1.4cqw;border-left:.42cqw solid var(--blue);background:var(--blue-soft)}.fork-path.amber{grid-column:2 / 4;grid-row:2;border-left-color:var(--amber);background:var(--amber-soft)}.fork-path b,.fork-path span{display:block}.fork-path span{margin-top:.4cqh;color:var(--muted);font-size:max(1.25cqw,var(--text-note))}.fork-join{grid-column:4;grid-row:1 / span 2;padding:3cqh 1.1cqw;border:.22cqw dashed var(--green);text-align:center;font-weight:700}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:2cqw;align-items:stretch}.timeline>div{min-height:23cqh;padding:2.5cqh 1.7cqw;border-top:.55cqh solid var(--line)}.timeline .steer{border-top-color:var(--red);background:#f9e2df94}.timeline small,.timeline b{display:block}.timeline small{margin-bottom:2cqh;color:var(--muted);font-size:max(1.05cqw,var(--text-note))}.timeline b{font-size:1.75cqw;line-height:1.45}.ladder{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4cqw;align-items:end}.ladder>div{display:grid;align-content:center;padding:1.5cqh 1.4cqw;border-bottom:.55cqh solid var(--green);background:#e2f1e87f}.ladder>div:nth-child(1){min-height:15cqh}.ladder>div:nth-child(2){min-height:20cqh;border-color:var(--blue);background:#e7effb8c}.ladder>div:nth-child(3){min-height:25cqh;border-color:var(--amber);background:#faedc98c}.ladder>div:nth-child(4){min-height:31cqh;border-color:var(--red);background:#f9e2df99}.ladder b,.ladder span{display:block}.ladder b{font-size:2.1cqw}.ladder span{margin-top:1cqh;color:var(--muted);font-size:max(1.3cqw,var(--text-note))}.slide-ladder .ann:after{left:calc(100% + 1.2cqw);top:-1cqh;width:13cqw}.evidence-rows{display:grid;gap:1.4cqh}.evidence-rows p{display:grid;grid-template-columns:14cqw 1fr;margin:0;padding:1.8cqh 0;border-bottom:.14cqh solid var(--line)}.evidence-rows b{color:var(--blue);font-size:1.8cqw}.evidence-rows span{font-size:1.55cqw}.slide-evidence blockquote{margin:3.5cqh auto 0;font-family:var(--hand);font-size:1.65cqw}.slide-image-split .slide-body{grid-template-columns:1.02fr 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