@font-face{font-family:'DM Sans';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/font-0.woff) format('woff')}
@font-face{font-family:'DM Sans';font-style:normal;font-weight:600;font-display:swap;src:url(fonts/font-2.woff) format('woff')}
@font-face{font-family:'Libre Caslon Display';font-style:normal;font-weight:400;font-display:swap;src:url(fonts/font-4.woff) format('woff')}
:root{font-family:'DM Sans',sans-serif;color:#242923;background:#f4f3ed;font-synthesis:none;--muted:#5c6259;--line:#d0d4c9;--accent:#335c42;--paper:#f4f3ed}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}a{color:var(--accent);text-underline-offset:.2em;text-decoration-thickness:1px}a:hover{color:#172c1d}button{cursor:pointer}button,input,select{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,video:focus-visible{outline:2px solid var(--accent);outline-offset:5px}[hidden]{display:none!important}
.skip{position:absolute;top:-100px;left:20px;background:var(--paper);padding:14px;z-index:3}.skip:focus{top:8px}
header{min-height:94px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);margin:0 auto;padding:0 5vw;max-width:1440px;gap:20px}.brand{text-decoration:none;font-weight:600;letter-spacing:-.7px;font-size:24px;color:#242923}.brand span{font-weight:400;color:var(--muted);font-size:15px;letter-spacing:0}header nav{display:flex;gap:26px;font-size:14px}header nav a{display:inline-flex;align-items:center;min-height:44px}
main{max-width:1440px;margin:auto;padding:48px 5vw 72px}main:focus{outline:none}footer{display:flex;justify-content:space-between;gap:20px;max-width:1296px;margin:0 auto;padding:28px 0 36px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
h1,h2,h3,p{margin-top:0}h1{font-family:'Libre Caslon Display',Georgia,serif;font-weight:400;letter-spacing:-1.6px;font-size:clamp(54px,6.2vw,88px);line-height:1.04;margin-bottom:24px}h2,h3{font-weight:600}.eyebrow{font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:16px}.intro{display:grid;grid-template-columns:1.2fr 1fr;gap:70px;align-items:end;margin-bottom:40px}.intro p{font-size:18px;color:var(--muted);line-height:1.7;max-width:430px;margin-bottom:8px}.start-note{display:flex;gap:32px;padding:22px 0;border-top:1px solid var(--line);line-height:1.65}.start-note h2{font-size:15px;flex:0 0 180px;margin:0}.start-note p{font-size:15px;max-width:720px;margin:0}
.toolbar{display:flex;align-items:end;gap:22px;border-block:1px solid var(--line);padding:18px 0;flex-wrap:wrap}.toolbar label{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--muted)}.toolbar .search{flex:1;min-width:230px}input,select{border:1px solid transparent;border-bottom-color:#7c8776;border-radius:0;background:transparent;min-height:44px;font-size:15px;padding:8px 0;color:#242923;max-width:100%}input::placeholder{color:var(--muted)}select{padding-right:24px}.reset,.empty button{border:1px solid #7c8776;background:transparent;padding:11px 15px;min-height:44px;font-size:13px}.reset:hover,.empty button:hover{border-color:var(--accent)}.results-heading{display:flex;justify-content:space-between;gap:20px;margin:26px 0 8px;color:var(--muted);font-size:13px}.results-heading p{margin:0}
.concept-row{display:grid;grid-template-columns:36px 1.05fr 1.2fr 84px 20px;gap:22px;align-items:center;padding:25px 0;border-bottom:1px solid var(--line);text-decoration:none;color:inherit}.concept-row:hover{background:#e9ece2;color:inherit}.number{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.concept-row h2{font-size:20px;letter-spacing:-.35px;margin:0}.concept-row p{font-size:15px;color:var(--muted);line-height:1.6;margin:0}.shelf-label{font-size:12px;color:var(--accent)}.arrow{font-size:20px}.empty{padding:50px 0}.empty h2{font-size:24px}.empty p{color:var(--muted);line-height:1.7}
.back{display:inline-flex;align-items:center;min-height:44px;font-size:14px;margin-bottom:28px}.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 350px;column-gap:80px;row-gap:32px;align-items:start}.article-head{grid-column:1}.article-head h1{font-size:clamp(48px,5.2vw,72px)}.deck{font-size:21px;line-height:1.6;color:var(--muted);max-width:720px;margin-bottom:20px}.prerequisites{font-size:14px;line-height:1.7;color:var(--muted)}.prose{max-width:680px;grid-column:1}.prose section{margin-bottom:40px;scroll-margin-top:24px}.prose h2{font-size:21px;line-height:1.4;letter-spacing:-.25px;margin-bottom:14px}.prose h3{font-size:17px;line-height:1.6;margin:20px 0 12px}.prose p,.prose li,.prose dd{font-size:17px;line-height:1.85;overflow-wrap:break-word}.prose p{margin-bottom:18px}.prose ul,.prose ol{padding-left:24px;margin:0 0 20px}.prose li{padding-left:4px;margin-bottom:12px}.workflow{margin:0}.workflow dt{font-size:14px;font-weight:600;margin-top:18px}.workflow dd{margin:4px 0 0}.exercise{border-block:1px solid var(--line);padding:28px 0 12px}.sources,.related{list-style:none;padding:0!important}.sources li,.related li{padding:10px 0!important;border-bottom:1px solid var(--line);margin:0!important}.sources a,.related a{font-size:15px;display:inline-block}.article-grid aside{grid-column:2;grid-row:1/3;min-width:0}video{display:block;width:100%;aspect-ratio:9/16;background:#050506;border-radius:2px;object-fit:contain}.media-label{font-size:13px;color:var(--muted);margin:12px 0}.video-lesson{font-size:14px;line-height:1.7;color:var(--muted);margin-bottom:16px}.compare-link{font-size:15px;display:inline-flex;align-items:center;min-height:44px}.chapter-nav{border-top:1px solid var(--line);margin-top:28px;padding-top:22px}.chapter-nav h2{font-size:14px;margin-bottom:8px}.chapter-nav a{display:block;font-size:14px;line-height:1.5;padding:12px 0}.chapter-turn{display:flex;justify-content:space-between;gap:30px;border-top:1px solid var(--line);padding-top:26px;margin-top:20px}.chapter-turn a{display:flex;flex-direction:column;gap:8px;max-width:46%;font-size:17px;line-height:1.5}.chapter-turn span{font-size:12px;color:var(--muted)}.review-date{font-size:13px;line-height:1.7;color:var(--muted);margin:32px 0 0}
.comparison-head{max-width:850px;margin-bottom:36px}.comparison-head h1{font-size:clamp(48px,5.2vw,72px)}.recommendation{max-width:850px;border-block:1px solid var(--line);margin-bottom:28px}.recommendation summary{font-size:17px;font-weight:600;padding:18px 0}.recommendation p{font-size:17px;line-height:1.75;margin:0 0 24px}.comparison-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px;align-items:start}.cut h2{font-size:21px;line-height:1.4;min-height:60px}.cut>p:not(.eyebrow){font-size:15px;line-height:1.7;margin-top:18px}.cut details{border-top:1px solid var(--line);font-size:13px;line-height:1.7;color:var(--muted)}summary{cursor:pointer;padding:14px 0;min-height:44px}.cut details p{margin-top:12px}.comparison-note{max-width:780px;font-size:14px;line-height:1.8;color:var(--muted);margin:40px 0}.comparison-findings{max-width:850px}.comparison-findings h2{font-size:21px}.comparison-findings li{font-size:16px;line-height:1.8;margin-bottom:12px}.media-error{font-size:14px;line-height:1.7;color:#8e312b}.about{margin:0 auto}.about h1{font-size:76px;margin:26px 0}.about .deck{font-size:20px;margin-bottom:40px}
@media(min-width:1500px){header{padding-inline:72px}}
@media(max-width:1400px){footer{margin-inline:5vw}}
@media(max-width:1050px){.article-grid{grid-template-columns:minmax(0,1fr) 300px;column-gap:40px}.concept-row{grid-template-columns:28px 1fr 1fr 18px;gap:16px}.shelf-label{display:none}.comparison-grid{gap:20px}.cut h2{font-size:19px}}
@media(max-width:760px){header{min-height:78px}.brand span{display:none}header nav{gap:18px;font-size:13px}.intro{display:block}.intro p{font-size:17px;margin-top:28px}.start-note{display:block}.start-note h2{margin-bottom:10px}.toolbar{gap:16px}.toolbar .search{flex-basis:100%}.toolbar label{flex:1}.toolbar label:not(.search){min-width:125px}.reset{align-self:end}.concept-row{grid-template-columns:24px 1fr 18px;gap:8px 12px;padding:22px 0}.concept-row h2{font-size:19px}.concept-row p{grid-column:2}.concept-row .arrow{grid-column:3;grid-row:1}.results-heading{font-size:12px}.results-heading p:last-child{max-width:140px;text-align:right}.article-grid{display:flex;flex-direction:column;gap:28px}.article-head{order:0}.article-grid aside{order:1;width:100%;max-width:420px;margin:auto}.prose{order:2}.article-head h1{font-size:52px}.deck{font-size:19px}.chapter-nav{display:none}.comparison-grid{grid-template-columns:1fr;gap:40px;max-width:420px;margin:auto}.cut h2{min-height:0;font-size:23px}.cut{border-bottom:1px solid var(--line);padding-bottom:20px}.about h1{font-size:58px}.chapter-turn a{font-size:15px}.prose p,.prose li,.prose dd{font-size:17px}}
@media(max-width:380px){header nav{gap:12px}.brand{font-size:21px}.article-head h1{font-size:46px}h1{font-size:50px}footer{flex-direction:column}.toolbar label{flex-basis:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{header nav,footer,aside,.toolbar,.comparison-grid video,.skip{display:none!important}body{background:white;color:black}main{padding:0;max-width:none}h1{font-size:38px}.article-grid{display:block}.prose{max-width:none}a{color:black}.chapter-turn{display:none}}
.read-first{display:none}.transcript{font-size:14px;line-height:1.8;border-top:1px solid var(--line);margin-top:14px}.transcript ol{padding-left:22px}.transcript li{margin-bottom:12px}.transcript summary{color:var(--accent)}
@media(max-width:760px){.read-first{display:inline-flex;align-items:center;min-height:44px;font-size:15px}}
body[data-page=comparison] main{padding-top:30px}body[data-page=comparison] .back{margin-bottom:16px}.comparison-head h1{font-size:clamp(44px,4.6vw,62px)}.comparison-head .deck{font-size:18px;line-height:1.65}.comparison-head{margin-bottom:28px}
.timestamp{font-variant-numeric:tabular-nums;font-weight:600;white-space:nowrap}
.chapter-media{scroll-margin-top:20px}
@media(min-width:761px) and (max-width:1050px){.comparison-grid{grid-template-columns:repeat(2,minmax(0,1fr));max-width:740px;margin-inline:auto}}

/* Side index: stable media footprint and explanations on demand. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.sequence-page{max-width:920px;margin:0 auto}
.sequence-page>h1{font-size:clamp(42px,5vw,68px);margin-bottom:32px}
.lesson-sequence{display:grid;grid-template-columns:minmax(220px,1fr) minmax(0,350px);gap:48px;align-items:start}
.lesson-list{border-top:1px solid var(--line)}
.lesson-list a{display:flex;align-items:center;gap:22px;min-height:68px;border-bottom:1px solid var(--line);padding:16px 12px;text-decoration:none;font-size:17px;line-height:1.5;color:inherit;border-left:2px solid transparent}
.lesson-list a span{font-size:14px;font-variant-numeric:tabular-nums;color:var(--muted)}
.lesson-list a[aria-current=step]{border-left-color:var(--accent);font-weight:600}
.lesson-list a:hover{background:#e9ece2}
.lesson-stage{min-width:0}
.lesson-panel{margin:0 0 16px}
.lesson-sequence.enhanced .lesson-panel{margin:0}
.lesson-picker{display:none}
.lesson-explanation,.chapter-reading{border-top:1px solid var(--line);margin-top:22px;font-size:15px;line-height:1.8}
.lesson-explanation>summary,.chapter-reading>summary{color:var(--accent)}
.lesson-readings{height:320px;overflow:auto;overscroll-behavior:contain;padding-right:10px}
.lesson-readings h2{font-size:19px}.lesson-readings p,.lesson-readings li{font-size:16px;line-height:1.75}
.lesson-readings ol{padding-left:22px}.lesson-readings li{margin-bottom:12px}
.chapter-reading{margin-top:36px}.chapter-reading .prose{margin:20px auto}
@media(max-width:760px){.sequence-page>h1{font-size:44px;margin-bottom:24px}.lesson-sequence{display:block}.lesson-sequence.enhanced .lesson-list{display:none}.lesson-picker{display:block;margin-bottom:18px}.lesson-picker select{width:100%;font-size:16px;min-height:48px;border:1px solid var(--line);padding:10px}.lesson-stage{max-width:350px;margin:auto}.lesson-list{margin-bottom:24px}.lesson-list a{min-height:48px;padding:10px}.lesson-readings{height:280px}}