@font-face{font-family:"Fraunces";font-style:normal;font-weight:100 900;font-display:swap;src:url(fonts/fraunces-normal-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Fraunces";font-style:normal;font-weight:100 900;font-display:swap;src:url(fonts/fraunces-normal-latin-ext.woff2) format("woff2");unicode-range:U+0100-02AF,U+0304,U+0308,U+0329,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:100 700;font-display:swap;src:url(fonts/IBMPlexSans-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:100 700;font-display:swap;src:url(fonts/IBMPlexSans-latin-ext.woff2) format("woff2");unicode-range:U+0100-02AF,U+0304,U+0308,U+0329,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

:root{--bg:#fbf3ea;--bg2:#f5e6d8;--fg:#2a1b22;--mut:#5b4650;--line:#e2cdbd;--line-soft:#ecdccf;--acc:#862a26;--acc-soft:#f2b8a8;--card:#fffaf5;--x:#7a4a2a;--dot:#a33a35;--serif:"Fraunces",Georgia,"Times New Roman",serif;--sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;--col:40rem;--bar:46px;color-scheme:light}
:root[data-theme=dark]{--bg:#0e1b22;--bg2:#14272f;--fg:#f3ece2;--mut:#c2cdcb;--line:#2a434b;--line-soft:#1f353d;--acc:#f4a48c;--acc-soft:#6a4a4c;--card:#12232b;--x:#e8c69a;--dot:#f4a48c;color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--fg);font:400 1.0625rem/1.62 var(--serif);font-optical-sizing:auto;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
svg[hidden]{display:none}
a{color:inherit;text-decoration-color:color-mix(in srgb,var(--acc) 60%,transparent);text-underline-offset:.18em}
a:hover{color:var(--acc)}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0}.skip:focus{left:8px;top:8px;z-index:99;background:var(--bg);padding:.4rem .7rem}

/* top bar */
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:.9rem;height:calc(var(--bar) + var(--browser-safe-top,env(safe-area-inset-top)));padding:var(--browser-safe-top,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left));background:color-mix(in srgb,var(--bg) 92%,transparent);border-bottom:1px solid var(--line-soft);font:500 .86rem/1 var(--sans)}
.brand{text-decoration:none;display:flex;align-items:center;gap:.45rem;white-space:nowrap}
.brand .paw svg{width:17px;height:17px;color:var(--acc);display:block}
.topnav{display:flex;gap:1rem;overflow-x:auto;scrollbar-width:none;min-width:0}
.topnav::-webkit-scrollbar{display:none}
.topnav a{text-decoration:none;color:var(--mut);white-space:nowrap}.topnav a:hover{color:var(--fg)}
.spacer{flex:1}
.chip{text-decoration:none;border:1px solid var(--line);border-radius:99px;padding:.32rem .7rem;white-space:nowrap}
.icon-btn{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line);border-radius:50%;background:none;color:var(--fg);cursor:pointer}
.icon-btn svg{width:17px;height:17px}
:root[data-theme=dark] .sun,:root:not([data-theme=dark]) .moon{display:none}
@media(max-width:760px){.topnav{display:none}}

/* hero: head and body on the left, the stage on the right; on phones the stage comes right after the title */
.hero{display:grid;grid-template-columns:minmax(0,1fr);gap:1rem;padding:1rem 16px 2rem;max-width:1280px;margin:0 auto;grid-template-areas:"head" "stage" "body" "tools"}
.hero-head{grid-area:head}.stage-wrap{grid-area:stage}.hero-body{grid-area:body}.hero-tools{grid-area:tools;display:flex;flex-direction:column;align-items:center;gap:.6rem}
@media(min-width:960px){.hero{grid-template-columns:minmax(330px,29rem) minmax(0,1fr);grid-template-areas:"head stage" "body stage" ". tools";gap:0 3.2rem;align-content:center;padding:2rem 2.5rem 3rem;min-height:calc(100svh - var(--bar))}
 .hero-head{align-self:end}.hero-body{align-self:start}}
.kicker{font:600 .78rem/1.3 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--acc);margin:0 0 .6rem}
h1{font:600 clamp(1.7rem,3.6vw,2.7rem)/1.08 var(--serif);letter-spacing:-.018em;margin:0 0 1rem;font-variation-settings:"SOFT" 100,"WONK" 0;text-wrap:balance}
.deck{font-size:1.1rem;line-height:1.58;margin:0 0 1.2rem}
.shared{font:500 .95rem/1.45 var(--sans);background:var(--bg2);border-left:3px solid var(--acc);padding:.6rem .8rem;margin:0 0 1rem;display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}
.btn{display:inline-flex;align-items:center;gap:.65rem;min-height:50px;padding:.7rem 1.2rem;border-radius:99px;border:1px solid var(--line);background:var(--card);color:var(--fg);font:600 1rem/1.2 var(--sans);cursor:pointer;transition:transform .15s,background .15s}
.btn svg{width:20px;height:20px;flex:none}
.btn.primary{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.btn.primary:hover{background:var(--acc);border-color:var(--acc);color:var(--bg)}
.btn:active{transform:scale(.97)}
.big-btn{min-height:58px;padding:.8rem 1.6rem;font-size:1.06rem}

/* the stage */
.stage-wrap{display:flex;flex-direction:column;align-items:center;gap:.55rem;min-width:0}
.stage{position:relative;width:min(100%,calc((100svh - var(--bar)) * .74),48rem);aspect-ratio:1;border-radius:28px;overflow:hidden;box-shadow:0 30px 70px -36px rgba(10,30,40,.6);background:#14303a;touch-action:manipulation}
:root[data-theme=dark] .stage{background:#14303a;box-shadow:0 30px 70px -36px rgba(0,0,0,.8)}
@media(max-width:959px){.stage{width:min(100%,calc((100svh - var(--bar)) * .46),30rem)}}
.stage canvas{display:block;width:100%;height:100%;cursor:pointer;outline:none}
.stage canvas:focus-visible{box-shadow:inset 0 0 0 3px var(--acc)}
.pat-hint{position:absolute;right:4%;bottom:4%;margin:0;padding:.38rem .75rem;border-radius:99px;background:rgba(20,40,48,.72);font:600 .82rem/1 var(--sans);color:#f2e3d6;pointer-events:none;white-space:nowrap;opacity:0;transition:opacity .5s}
.pat-hint.on{opacity:1}

.master{display:flex;align-items:center;gap:.7rem;width:min(100%,32rem);font:600 .82rem/1 var(--sans);color:var(--mut)}
.master input{flex:1}
.readout{font:600 1rem/1.2 var(--sans);margin:0 0 .5rem;color:var(--fg);font-variant-numeric:tabular-nums}
input[type=range]{-webkit-appearance:none;appearance:none;height:28px;background:transparent;accent-color:var(--acc);cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:8px;border-radius:99px;background:linear-gradient(90deg,var(--line),var(--acc-soft))}
input[type=range]::-moz-range-track{height:8px;border-radius:99px;background:linear-gradient(90deg,var(--line),var(--acc-soft))}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;margin-top:-9px;border-radius:50%;background:var(--card);border:3px solid var(--acc);box-shadow:0 2px 6px rgba(0,0,0,.2)}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--card);border:3px solid var(--acc)}
.workshop{width:min(100%,32rem);border:1px solid var(--line-soft);border-radius:16px;padding:.1rem .9rem;background:color-mix(in srgb,var(--card) 70%,transparent)}
.workshop summary{cursor:pointer;font:600 .9rem/1 var(--sans);padding:.75rem 0;list-style-position:inside}
.fsliders{display:grid;grid-template-columns:1fr 1fr;gap:.1rem 1rem}
@media(max-width:420px){.fsliders{grid-template-columns:1fr}}
.fs{display:flex;flex-direction:column;font:500 .8rem/1.2 var(--sans);color:var(--mut)}
.furs{display:flex;align-items:center;gap:.5rem;padding:.5rem 0 .8rem;font:500 .8rem/1 var(--sans);color:var(--mut)}
.fur{width:34px;height:34px;border-radius:50%;border:2px solid transparent;padding:2px;background:none;cursor:pointer}
.fur[aria-pressed=true]{border-color:var(--acc)}
.sw{display:block;width:100%;height:100%;border-radius:50%}
.sw-honey{background:radial-gradient(circle at 35% 30%,#f0c58e,#c98b52 60%,#7d4e2a)}
.sw-snow{background:radial-gradient(circle at 35% 30%,#fff,#e9e2d8 60%,#a89c90)}
.sw-ash{background:radial-gradient(circle at 35% 30%,#c9c9d2,#8f8f98 60%,#4e4e58)}
.sw-ginger{background:radial-gradient(circle at 35% 30%,#f7ad6b,#d9773a 60%,#8a3f17)}
.sw-cocoa{background:radial-gradient(circle at 35% 30%,#9c6c4d,#6b4632 60%,#38231a)}
.hero-share{display:flex;flex-direction:column;align-items:center;gap:.3rem}
.hero-share .share-row{justify-content:center}

/* share row */
.share{margin:.4rem 0 .2rem}
.share-row{display:flex;align-items:center;gap:.45rem;flex-wrap:wrap}
.share-label{font:500 .85rem/1 var(--sans);color:var(--mut);margin-right:.2rem}
.share-row a,.share-row button{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:1px solid var(--line-soft);background:transparent;color:var(--fg);cursor:pointer}
@media(pointer:coarse){.share-row a,.share-row button{width:44px;height:44px}}
.share-row a:hover,.share-row button:hover{border-color:var(--acc);color:var(--acc)}
.share-row svg{width:18px;height:18px}
.share-status{font:400 .82rem/1.3 var(--sans);color:var(--mut);min-height:1.1em;margin:.3rem 0 0;text-align:center}
.link-btn{background:none;border:1px solid var(--line);border-radius:99px;padding:.45rem .85rem;color:var(--fg);font:500 .9rem/1 var(--sans);cursor:pointer;min-height:40px}
.link-btn:hover{border-color:var(--acc)}
.row{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin:.6rem 0}

/* article */
main>section:not(.hero){max-width:var(--col);margin:0 auto;padding:2.8rem 16px 1rem;scroll-margin-top:calc(var(--bar) + 10px)}
h2{font:600 clamp(1.55rem,3vw,2.1rem)/1.15 var(--serif);letter-spacing:-.01em;margin:0 0 1rem;font-variation-settings:"SOFT" 100;text-wrap:balance}
h3{font:600 1.25rem/1.3 var(--serif);margin:0 0 .4rem}
p{margin:0 0 1.05rem}
.note,figcaption{font:400 .88rem/1.5 var(--sans);color:var(--mut)}
sup .ref{font:600 .7em/1 var(--sans);text-decoration:none;color:var(--acc);padding:0 .1em}

/* Lorenz pairs */
.pairs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.8rem;margin:1.4rem -0px .4rem}
@media(min-width:900px){.pairs{margin-left:-6rem;margin-right:-6rem}}
@media(max-width:560px){.pairs{grid-template-columns:repeat(2,minmax(0,1fr))}}
.pair{margin:0;background:#14303a;border-radius:16px;padding:.4rem .4rem .6rem}
.pair canvas{display:block;width:100%;aspect-ratio:5/3.4}
.pair figcaption{text-align:center;font-weight:600;color:#f3ece2;font-size:.84rem}

/* teddy bears */
.bears-fig{margin:1.4rem 0 1.6rem}
@media(min-width:900px){.bears-fig{margin-left:-7rem;margin-right:-7rem}}
.bears-grid{display:grid;grid-template-columns:1fr;gap:.6rem;background:var(--bg2);border-radius:18px;padding:1rem}
#bears{width:min(100%,34rem);aspect-ratio:1/.62;display:block;margin:0 auto}
#t-chart{width:100%;height:auto;display:block;font:500 13px var(--sans)}
#t-chart .grid{stroke:var(--line);stroke-width:1}
#t-chart .one{stroke:var(--mut);stroke-width:1;stroke-dasharray:3 4}
#t-chart .tick{fill:var(--mut)}
#t-chart .axis{fill:var(--mut);font-weight:600}
#t-chart .x{stroke:var(--x);stroke-width:2;stroke-linecap:round}
#t-chart .dot{fill:var(--dot)}
#t-chart .hit{fill:transparent;cursor:pointer}
#t-chart .pt{transition:opacity .3s}#t-chart .pt.later{opacity:.15}
#t-chart .pt.shop.on .hit{stroke:none}
@media(max-width:600px){#t-chart{font-size:20px}}
#t-chart .pt.on .hit{fill:color-mix(in srgb,var(--acc) 22%,transparent);stroke:var(--acc);stroke-width:2}
.tl{display:flex;align-items:center;gap:.7rem;margin:.8rem 0 .2rem;padding-right:8px}
.tl input{flex:1}
.t-cap{font:500 .95rem/1.45 var(--sans);min-height:2.9em;margin:.2rem 0 .4rem}

/* Gould */
.gould{display:grid;gap:.7rem;margin:1.2rem 0 1.6rem}
.g-row{display:grid;grid-template-columns:minmax(8rem,12rem) minmax(0,1fr) auto;gap:.8rem;align-items:center;font:500 .88rem/1.3 var(--sans)}
@media(max-width:560px){.g-row{grid-template-columns:1fr auto}.g-bar{grid-column:1/-1;order:3}}
.g-bar{position:relative;height:14px;border-radius:99px;background:var(--bg2);overflow:hidden}
.g-a,.g-b{position:absolute;left:0;top:0;bottom:0;border-radius:99px}
.g-b{background:var(--acc-soft)}.g-a{background:var(--x);opacity:.75}
.g-val{font-variant-numeric:tabular-nums;color:var(--mut)}.g-val b{color:var(--fg)}
.g-legend{font:500 .8rem/1.4 var(--sans);color:var(--mut);margin:.2rem 0 0;display:flex;align-items:center;gap:.4rem;flex-wrap:wrap}
.g-key{display:inline-block;width:14px;height:10px;border-radius:3px}.g-ka{background:var(--x);opacity:.75}.g-kb{background:var(--acc-soft);margin-left:.6rem}

/* 130 ms */
.flash-fig{margin:1.4rem 0;display:grid;justify-items:center;gap:.7rem;text-align:center}
.flash-box{width:min(70%,18rem);aspect-ratio:1;border-radius:22px;background:#14303a;overflow:hidden;position:relative}
#flash-cv{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0}
#flash-ghost{position:absolute;inset:0;width:100%;height:100%;opacity:.5}
.flash-ms{position:absolute;left:0;right:0;top:8%;text-align:center;font:600 1.3rem/1 var(--serif);color:var(--mut)}

/* the test */
#duel-intro{margin:1.2rem 0 1.6rem}
#duel{margin:1.2rem 0}
@media(min-width:900px){#duel,.duel-res{margin-left:-5rem;margin-right:-5rem}}
.duel-top{display:flex;align-items:center;gap:.8rem;font:600 .9rem/1 var(--sans);margin-bottom:.7rem;font-variant-numeric:tabular-nums}
.duel-track{flex:1;height:6px;border-radius:99px;background:var(--bg2);overflow:hidden}
#duel-bar{display:block;height:100%;background:var(--acc);transition:width .25s}
.duel-pair{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.pick{padding:0;border:2px solid transparent;border-radius:22px;overflow:hidden;cursor:pointer;background:none;transition:transform .15s,border-color .15s}
.pick:hover{border-color:var(--acc)}
.pick canvas{display:block;width:100%;aspect-ratio:1}
.pick.picked{animation:pick .26s}
.duel-or{font:600 .9rem/1 var(--sans);color:var(--mut);text-align:center;margin:.5rem 0 0}
.pair .ends{display:block;font-weight:500;font-size:.72rem;color:#b9c9c6}
@keyframes pick{50%{transform:scale(.96)}}
@media(prefers-reduced-motion:reduce){.pick.picked{animation:none}#duel-bar{transition:none}}
.duel-res{scroll-margin-top:calc(var(--bar) + 16px);background:var(--card);border:1px solid var(--line);border-radius:20px;padding:1.2rem 1.2rem 1rem;margin:1.2rem 0;outline:none}
.res-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.4rem;align-items:start}
@media(max-width:620px){.res-grid{grid-template-columns:1fr}}
#res-h{font-size:1.5rem}
#res-p{font:400 1rem/1.55 var(--sans)}
.res-sub{font:600 .85rem/1.3 var(--sans);color:var(--mut);margin:.4rem 0 .5rem}
.res-bars{list-style:none;margin:0;padding:0;display:grid;gap:.55rem}
.res-bars li{display:grid;grid-template-columns:minmax(7.5rem,9rem) minmax(0,1fr) 3.2rem;gap:.15rem .7rem;align-items:center;font:500 .88rem/1.25 var(--sans)}
.res-bars .k{font-variant-numeric:tabular-nums;text-align:right;font-weight:600}
.res-bars .val{grid-column:1/-1;color:var(--mut);font-size:.8rem;margin-top:-.1rem}
.res-bars .track{position:relative;height:12px;border-radius:99px;background:var(--bg2);overflow:hidden}
.res-bars .fill{position:absolute;left:0;top:0;bottom:0;background:var(--mut);border-radius:99px}
.res-bars li[data-c=clear] .fill,.res-bars li[data-c=lean] .fill{background:var(--acc)}
.res-bars .mid{display:none}
.ideal{margin:0;text-align:center}
.ideal canvas{width:100%;max-width:22rem;aspect-ratio:1;border-radius:20px;display:block;margin:0 auto .3rem}

.sources{font:400 .86rem/1.5 var(--sans);color:var(--mut);padding-left:1.3rem}
.sources li{margin:.3rem 0}
.sources a{word-break:break-word}
.share.end{margin:1.4rem 0 .5rem}
.site-footer{max-width:var(--col);margin:3rem auto 0;padding:1.4rem 16px 3rem;border-top:1px solid var(--line-soft);font:400 .85rem/1.5 var(--sans);color:var(--mut)}

/* reading rail: hairline dots in the right gutter, after the opening */
.rail{position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:40;display:flex;flex-direction:column;gap:.15rem;opacity:0;pointer-events:none;transition:opacity .4s}
.past-hero .rail{opacity:1;pointer-events:auto}
.rail-dot{position:relative;display:grid;place-items:center;width:22px;height:22px;text-decoration:none}
.rail-dot .dot{width:7px;height:7px;border-radius:50%;background:var(--line);transition:background .2s,transform .2s}
.rail-dot[aria-current] .dot{background:var(--acc);transform:scale(1.3)}
.rail-label{position:absolute;right:28px;top:50%;transform:translateY(-50%);white-space:nowrap;font:500 .78rem/1 var(--sans);background:var(--card);border:1px solid var(--line-soft);border-radius:8px;padding:.35rem .5rem;opacity:0;pointer-events:none;transition:opacity .15s}
.rail-dot:hover .rail-label,.rail-dot:focus-visible .rail-label{opacity:1}
@media(max-width:1100px){.rail{display:none}}
@media print{.rail,.topbar,.share{display:none}}

@media(max-width:440px){.share-label{flex-basis:100%;margin-bottom:.15rem}.duel-res{padding-bottom:3.6rem}}
@media(max-width:600px){.duel-pair{gap:.5rem}#duel{margin-left:-8px;margin-right:-8px}}
.pick:focus-visible{border-color:var(--acc)}