/* AUTHORITATIVE SHARED THEME. See DESIGN-SYSTEM.md. Applies to every future page/template. */
:root{--font-body:Inter,sans-serif;--nav-max:1400px;--nav-inset:32px;--footer-max:1400px;--footer-inset:48px;--nav-height:73px;--gallery-max:1120px;--article-shell:1280px;--article-surround:1168px;--article-panel:1152px;--left-rail:256px;--right-rail:256px;--article-gutter:48px;--ink:#171717;--body-ink:#262626;--muted:#737373;--guide:#0000000d;--active-bg:#dbeafe;--active-ink:#1d4ed8}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:#171717;background:#fafafa;font-family:Inter,Arial,sans-serif}button,input,select{font:inherit}button,a,input,select{outline-offset:4px}a{color:inherit;text-decoration:none}header{height:73px;position:sticky;top:0;z-index:20;background:#fffffff2;backdrop-filter:blur(12px);border-bottom:1px solid #0000000d;display:flex;align-items:center;justify-content:space-between;padding:16px 80px}header .brand{font:20px Helvetica,Arial,sans-serif}header nav{display:flex;gap:38px;font-size:12px;font-weight:500}.active{color:#4364b5}main{padding-top:119px}.hero{border-top:1px solid #0000000d;border-bottom:1px solid #0000000d;position:relative;padding:8px 32px 48px}.hero-inner{max-width:1008px;padding:0 8px 0;margin:auto;min-height:282px;display:grid;grid-template-columns:1fr 288px;gap:72px;border-inline:1px solid #0000000d;align-items:center}.eyebrow{font-size:11px;letter-spacing:.08em;color:#737373}h1{font-size:48px;line-height:1;letter-spacing:-1.2px;font-weight:600;margin:24px 0}p.deck{font-size:16px;line-height:24px;color:#525252;max-width:620px;margin:26px 0 0}.hero img{width:288px;height:248px;object-fit:cover;border-radius:16px}.boundary{position:fixed;top:73px;bottom:0;width:1px;background:#0000000d;z-index:-1}.boundary.l{left:32px}.boundary.r{right:32px}.gallery{margin:32px 40px 64px;padding:24px;background:white;border:1px solid #e5e5e5;border-radius:16px;box-shadow:0 2.8px 2.2px #00000009,0 6.7px 5.3px #0000000c,0 12.5px 10px #0000000f,0 22.3px 17.9px #00000012,0 41.8px 33.4px #00000016,0 100px 80px #0000001f}.searchrow{display:flex;gap:16px;align-items:center}.searchrow input{height:40px;border:0;border-radius:8px;background:#f5f5f5;padding:12px 16px;flex:1;min-width:0;font-size:14px}.searchrow select{height:40px;background:#f5f5f5;border:0;border-radius:8px;padding:8px 12px;font-size:12px}.count{font-size:13px;color:#737373;min-width:112px}.filters{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.filters button{border:0;background:#f5f5f5;border-radius:8px;padding:10px 12px;font-size:12px;cursor:pointer;transition:all 150ms cubic-bezier(.4,0,.2,1)}.filters button[aria-pressed=true]{background:#171717;color:#fff}.score-note{font-size:12px;color:#737373;margin:20px 0}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{overflow:hidden;border:1px solid #0000000d;border-radius:12px;background:#fff3;transition:all 150ms cubic-bezier(.4,0,.2,1)}.card:hover{border-color:#0000001a}.card img{aspect-ratio:4/3;width:100%;object-fit:cover;display:block;transition:transform 300ms}.card-body{padding:12px;background:#ffffff80;backdrop-filter:blur(4px)}.card h3{font-size:14px;line-height:20px;font-weight:500;margin:0;min-height:40px}.card-meta{display:flex;align-items:start;justify-content:space-between;gap:8px;margin-top:10px;font-size:11px;color:#737373;min-height:30px}.card-meta span:last-child{white-space:nowrap;color:#525252}.empty{padding:50px;text-align:center;color:#737373;grid-column:1/-1}footer{margin:70px 64px 32px;padding:24px 0;border-top:1px solid #0000000d;font-size:13px;color:#737373}footer strong{font-size:22px;color:#171717;font-weight:400}footer p{line-height:24px}.review{position:fixed;bottom:16px;right:16px;z-index:50;display:flex;gap:6px;background:#171717;padding:6px;border-radius:12px;box-shadow:0 4px 20px #0002}.review a{color:#fff;font-size:12px;padding:9px 12px;border-radius:6px}.review a:hover{background:#ffffff20}.detail{display:none}.detail.visible{display:block}.left-rail{position:fixed;top:73px;left:0;width:256px;height:calc(100vh - 73px);overflow:auto;background:#f9fafbb3;border-right:1px solid #e5e7eb;padding:24px 16px;z-index:10}.left-rail>p{font-size:11px;letter-spacing:.04em;margin:32px 8px 16px;color:#737373}.left-rail a{display:block;padding:10px 12px;font-size:13px;line-height:20px;border-radius:6px;margin:4px 0}.left-rail a[aria-current]{background:#ebf0fb;color:#4364b5}.detail-main{margin-left:256px;padding:24px}.article-hero{padding:12px;max-width:1152px;margin:0 auto 64px}.crumb{font-size:12px;color:#737373}.article-hero h1{font-size:48px;font-weight:400;letter-spacing:-2.4px;line-height:1;margin:24px 0;max-width:1080px}.article-hero .subtitle{font-size:24px;line-height:32px;color:#525252;margin:24px 0}.byline{font-size:11px;color:#737373;letter-spacing:.03em}.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 256px;gap:48px}.article-copy{padding:0 24px 32px;background:white;border-radius:16px;min-width:0;color:#404040}.article-copy p{font-size:16px;line-height:32px;margin:24px 0}.article-copy h2{font-size:24px;font-weight:500;letter-spacing:-.6px;color:#171717;margin:60px 0 24px;scroll-margin-top:110px}.article-copy h3{font-size:16px;line-height:26px;font-weight:500;color:#171717;margin-top:32px}.right-rail{position:sticky;top:96px;max-height:calc(100vh - 112px);overflow:auto;align-self:start;scrollbar-width:thin}.right-rail .box{border:1px solid #e5e7eb;border-radius:8px;background:#f9fafb;padding:20px;margin-bottom:20px}.box h2{font-size:16px;font-weight:600;margin:0 0 20px}.box p{font-size:12px;line-height:20px;color:#737373}.toc a{display:block;font-size:14px;color:#525252;line-height:20px;margin:14px 0}.big-score{font-size:36px;font-weight:400}.metric{display:grid;grid-template-columns:1fr auto;gap:6px;font-size:12px;color:#525252;margin-top:18px}.metric b{font-weight:500}.metric i{height:3px;background:linear-gradient(to right,#6e84ae var(--value),#e5e7eb var(--value));grid-column:1/-1;border-radius:2px}.paper{padding:16px 0;border-top:1px solid #e5e7eb}.paper strong{font-size:14px;font-weight:500;line-height:21px;display:block}.paper small{display:block;margin:10px 0;font-size:11px;line-height:18px;color:#737373}.paper p{margin:0}.box dt{font-size:11px;color:#737373;margin:18px 0 6px}.box dd{margin:0;font-size:13px;line-height:21px}.detail footer{margin-left:0}.mobile-rail{display:none}dialog{border:1px solid #e5e5e5;border-radius:16px;padding:28px;max-width:460px;font-size:14px;line-height:24px}dialog::backdrop{background:#0005}dialog button{padding:10px 14px;border:0;border-radius:8px;cursor:pointer}.prototype-note{font-size:12px;color:#737373}.site-nav a{cursor:default}@media(max-width:1100px){header{padding-inline:32px}header nav{gap:20px}.hero-inner{gap:32px}.grid{grid-template-columns:repeat(3,minmax(0,1fr))}.left-rail{width:220px}.detail-main{margin-left:220px}.article-grid{gap:24px;grid-template-columns:minmax(0,1fr) 230px}.right-rail{width:230px}.article-hero h1{font-size:40px}.article-hero .subtitle{font-size:20px;line-height:28px}}@media(max-width:800px){header{padding:16px 24px}header nav a:not(.gapnav){display:none}main{padding-top:56px}.hero{padding:16px 24px 32px}.hero-inner{border:0;grid-template-columns:1fr;gap:24px}.hero img{width:100%;height:220px}.hero h1{font-size:42px}.gallery{margin:24px 16px 48px;padding:16px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.searchrow{flex-wrap:wrap}.searchrow input{flex-basis:100%}.card h3{font-size:13px;min-height:60px}.card-meta{flex-direction:column;min-height:55px}.left-rail{display:none}.detail-main{margin:0;padding:16px}.article-hero{padding:8px;margin-bottom:40px}.article-hero h1{font-size:36px;letter-spacing:-1.5px;line-height:1.08}.article-hero .subtitle{font-size:20px;line-height:28px}.article-grid{display:flex;flex-direction:column}.article-copy{padding:0 8px}.right-rail{width:100%;position:static;max-height:none;overflow:visible}.mobile-rail{display:block;padding:12px 24px;background:#f5f5f5}.mobile-rail select{width:100%;padding:10px;border:1px solid #e5e5e5;background:white}.review{bottom:8px;right:8px}footer{margin:40px 24px 75px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Measured Aura container hierarchy; corrections supersede the first mockup. */
#index main{max-width:1152px;padding:119px 16px 0;margin:0 auto}
#index .hero{padding:8px 16px 48px;border-inline:1px solid #0000000d}
#index .hero-inner{max-width:none;padding:0;border:0;grid-template-columns:minmax(0,1fr) 288px;gap:64px}
#index .gallery{width:100%;max-width:1120px;margin:32px auto 64px;padding:16px;background:#fafafa4d;border:0;border-radius:0;box-shadow:none}
#index .grid{grid-template-columns:repeat(3,minmax(0,1fr));column-gap:12px;row-gap:64px}
#index .card h3{min-height:40px}
#index .card-meta{min-height:30px}
.boundary.l{left:max(16px,calc((100vw - 1120px)/2))}
.boundary.r{right:max(16px,calc((100vw - 1120px)/2))}
#index footer{max-width:1120px;margin:64px auto 32px;padding:24px 16px}
/* Aura: 256px left rail, centered max-1280 shell, 8px wrapper,
   max-1152 article panel, 1px border + 24px padding, 48px gutter, 256px rail. */
.detail-main{width:calc(100% - 256px);max-width:1280px;margin-left:calc(256px + max(0px,(100vw - 1536px)/2));padding:8px}
.article-hero{width:100%;max-width:1152px;margin:0 0 64px;padding:12px}
.article-grid{width:100%;max-width:1152px;margin:0 auto;grid-template-columns:minmax(0,1fr) 256px;gap:48px;padding:28px 24px;background:white;border:1px solid #ffffff0d;border-radius:16px;box-shadow:0 1px 2px #0000000d}
.article-copy{padding:0;max-width:798px;border-radius:0}
.right-rail{width:256px;min-width:0;position:sticky;top:96px;max-height:calc(100vh - 112px)}
.detail-main footer{width:100%;max-width:1152px;margin:64px auto 32px;padding:24px}
@media(max-width:1279px){.article-grid{grid-template-columns:minmax(0,1fr)}.article-copy{max-width:none}.right-rail{position:static;width:100%;max-height:none;overflow:visible;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.right-rail .box{margin:0}.right-rail .toc{grid-column:1/-1}.right-rail .toc a{display:inline-block;margin-right:20px}.left-rail{width:256px}}
@media(max-width:800px){#index main{padding:56px 16px 0}#index .hero{padding:16px 0 32px;border-inline:0}#index .hero-inner{grid-template-columns:1fr;gap:24px}#index .gallery{padding:0;margin:32px auto 48px}#index .grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:40px}.detail-main{width:100%;max-width:none;margin:0;padding:16px}.article-grid{padding:20px 16px;gap:32px}.article-hero{padding:8px;margin-bottom:40px}.right-rail{display:block}.right-rail .box{margin-bottom:20px}.article-copy{padding:0}#index footer{margin:40px auto 80px}.article-hero h1{font-size:36px}}
@media(max-width:480px){#index .grid{grid-template-columns:1fr;row-gap:40px}#index .card h3{min-height:0}#index .card-meta{flex-direction:row;min-height:0}}
/* Article structure: evidence-led modules, not decorative filler. */
body:has(.detail.visible)>.boundary{display:none}
.article-hero{margin-left:8px;width:calc(100% - 16px)}
.article-copy h2{display:flex;gap:14px;align-items:baseline;border-top:1px solid #e5e7eb;padding-top:28px}
.section-num{font-size:12px;letter-spacing:.04em;font-weight:500;color:#9ca3af;flex:none}
.kicker{display:block;font-size:10px;letter-spacing:.1em;font-weight:600;color:#737373}
.evidence-compare{margin:40px 0;padding:24px;background:#f9fafb;border:1px solid #e5e7eb;border-radius:12px}
.evidence-compare figcaption strong{display:block;font-size:20px;font-weight:500;letter-spacing:-.4px;margin-top:10px;color:#171717}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px}
.compare-grid section+section{border-left:1px solid #e5e7eb;padding-left:24px}
.study-label{font-size:10px;letter-spacing:.06em;color:#737373}
.article-copy .compare-grid h3{font-size:14px;margin:12px 0;color:#404040}
.evidence-stat{font-size:30px;letter-spacing:-1px;color:#171717;margin:20px 0 8px}
.evidence-stat span{color:#9ca3af;font-size:22px}
.article-copy .compare-grid p{font-size:12px;line-height:20px;margin:6px 0 18px;color:#737373}
.study-limit{font-size:11px;color:#525252;border-top:1px solid #e5e7eb;padding-top:14px;line-height:18px}
.article-copy .figure-note{font-size:12px;line-height:20px;margin:24px 0 0;color:#737373}
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.why-card{border:1px solid #e5e7eb;border-radius:8px;padding:20px;background:#fafafa}
.mini-number{font-size:11px;color:#9ca3af}
.article-copy .why-card h3{margin:12px 0;font-size:16px}
.article-copy .why-card p{font-size:14px;line-height:24px;margin:0}
.study-list{display:grid;gap:16px}
.study-card{padding:24px;border:1px solid #e5e7eb;border-radius:10px;background:#fff}
.study-card-top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.paper-number{font-size:11px;color:#9ca3af;letter-spacing:.05em}
.evidence-type{font-size:10px;border:1px solid #e5e7eb;border-radius:5px;background:#f9fafb;padding:4px 8px;color:#525252}
.article-copy .study-card h3{font-size:14px;margin:16px 0 8px;font-weight:500}
.article-copy .study-card p{margin:0;font-size:15px;line-height:28px}
.gap-callout,.takeaway{border:1px solid #dce4ee;border-left:3px solid #6e84ae;border-radius:0 10px 10px 0;background:#f5f8fc;padding:24px}
.article-copy .gap-callout p,.article-copy .takeaway p{margin:12px 0 0;line-height:30px}
.first-moves{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.first-moves li{display:flex;align-items:flex-start;gap:20px;padding:24px;border:1px solid #e5e7eb;border-radius:10px;background:#fafafa}
.step-number{display:flex;align-items:center;justify-content:center;width:28px;height:28px;flex:none;border:1px solid #e5e7eb;border-radius:50%;font-size:12px;background:#fff;color:#737373}
.article-copy .first-moves h3{margin:0 0 12px;line-height:28px}
.article-copy .first-moves p{margin:0;line-height:28px;font-size:15px}
.invitation{padding:8px 0 8px 24px;border-left:2px solid #e5e7eb}
.article-copy .invitation p{margin:0}
@media(max-width:800px){.article-hero{margin-left:0;width:100%}.compare-grid,.why-grid{grid-template-columns:1fr}.compare-grid section+section{border-left:0;border-top:1px solid #e5e7eb;padding:24px 0 0}.first-moves li{padding:20px;gap:12px}.evidence-compare,.study-card{padding:20px}}
.article-lead{margin:0 0 32px}
.article-lead img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;border:1px solid #0000000d;border-radius:12px}
.article-lead figcaption,.article-data-image figcaption{margin-top:12px;font-size:11px;line-height:18px;color:#737373}
.article-data-image{margin:40px 0}
.article-data-image img{width:100%;height:auto;display:block;border:1px solid #e5e7eb;border-radius:12px}

/* Live Aura measurement pass, September 17; shell widths per user correction. */
@font-face{font-family:Inter;src:url('assets/fonts/inter-400.ttf') format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:Inter;src:url('assets/fonts/inter-500.ttf') format('truetype');font-weight:500;font-display:swap}
@font-face{font-family:Inter;src:url('assets/fonts/inter-600.ttf') format('truetype');font-weight:600;font-display:swap}
@font-face{font-family:Inter;src:url('assets/fonts/inter-300.ttf') format('truetype');font-weight:300;font-display:swap}
body{font-family:Inter,sans-serif;background:#fff;color:#171717;overflow-x:clip}
header{padding:0;height:73px}.nav-inner{width:100%;max-width:1400px;padding:16px 32px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}header .brand{font:400 20px/28px Inter,sans-serif;white-space:nowrap}header nav{gap:28px}header nav a{cursor:pointer}.boundary{display:none}
#index main{padding-top:119px;padding-bottom:48px}.guides{position:relative}.guides:before,.guides:after{content:"";position:absolute;pointer-events:none;left:0;width:4000px;margin-left:-2000px;height:0;border-top:1px solid #0000000d;z-index:-1}.guides:before{top:0}.guides:after{bottom:0}
#index .hero{border:0;padding:8px 16px 48px}#index .hero-inner{position:relative;min-height:282px}#index .hero-inner:before,#index .hero-inner:after{content:"";position:absolute;pointer-events:none;height:4000px;margin-top:-2000px;top:0;width:0;border-left:1px solid #0000000d;z-index:-1}#index .hero-inner:before{left:-16px}#index .hero-inner:after{right:-16px}
#index .gallery{padding:0;background:none;margin:32px auto 0}.gallery-controls{padding:16px}.filters{margin-bottom:0}.score-note{margin-bottom:0}#index .grid{display:block}.gap-group{padding:16px;margin:32px 0;background:#fafafa4d}.group-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:28px;margin:0 0 8px}.group-heading h2{display:flex;gap:8px;align-items:center;font-size:16px;line-height:24px;font-weight:500;margin:0}.group-heading>span{font-size:12px;color:#737373}.group-description{font-size:12px;line-height:20px;color:#737373;margin:0 0 20px}svg{width:16px;height:16px;flex:none}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:48px 12px}.card-matte{aspect-ratio:4/3;padding:16px;background:var(--matte,#e4e8db);border-radius:12px;overflow:hidden}.card-picture{height:100%;width:100%;position:relative;overflow:hidden;border-radius:7px}.card .card-picture img{height:100%;width:100%;aspect-ratio:auto;object-fit:cover;object-position:top}.card-overlay{position:absolute;inset:0;display:flex;align-items:end;padding:16px;color:white;background:linear-gradient(transparent 45%,#000c);font-size:12px;opacity:0;transition:opacity 300ms}.card:hover .card-overlay,.card:focus-visible .card-overlay{opacity:1}.card:hover img{transform:scale(1.03)}[data-theme="1"]{--matte:#dce8eb}[data-theme="2"]{--matte:#e4e0ed}[data-theme="3"]{--matte:#eee8ce}[data-theme="4"]{--matte:#ebddd7}[data-theme="5"]{--matte:#d9e8df}
#index .card h3{font-size:12px;line-height:16px;font-weight:500;min-height:32px}.card-meta{margin-top:8px;gap:10px;font-size:10px;line-height:14px}#index .card-meta{min-height:28px;flex-direction:row}.card-meta span:first-child{max-width:230px}.card-body{padding:12px}.card{background:#fff3}
/* 100vw footer background; 1400px border-box content area, 48px horizontal padding. */
footer.site-footer,#index footer.site-footer,.detail footer.site-footer{width:100%;max-width:none;margin:0;padding:64px 0;background:#fafafa;border:1px solid #f5f5f5;border-inline:0;color:#737373;position:relative;z-index:11}
.footer-inner{max-width:1400px;width:100%;padding:0 48px;margin:auto}.footer-top{display:flex;justify-content:space-between;align-items:flex-start;gap:48px;margin-bottom:48px}.footer-intro{max-width:384px}.footer-intro strong{font-size:24px;line-height:32px;font-weight:400;color:#171717}.footer-intro p{font-size:14px;line-height:20px;margin:16px 0 0}.footer-columns{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:48px}.footer-column h2{font-size:10px;line-height:20px;font-weight:300;text-transform:uppercase;letter-spacing:.03em;margin:0 0 12px;color:#737373}.footer-column a{display:block;font-size:14px;line-height:20px;margin:8px 0;white-space:nowrap;transition:color 150ms}.footer-column a:hover{color:#171717}.footer-bottom{border-top:1px solid #e5e5e5;padding-top:24px;display:flex;justify-content:space-between;gap:24px;font-size:12px;line-height:20px}.footer-bottom p{margin:0}
/* Nested article framing. Header and article share their content-left coordinate. */
.detail-main{padding:8px;width:calc(100% - 256px);max-width:1280px;margin-left:calc(256px + max(0px,(100vw - 1536px)/2))}.article-wrap{width:100%;max-width:1168px;padding:8px;background:#fafafa;margin:0 auto 64px}.article-grid{max-width:1152px;width:100%;padding:28px 24px;border:1px solid #ffffff0d;border-radius:16px;box-shadow:0 1px 2px #0000000d;display:grid;grid-template-columns:minmax(0,1fr) 256px;gap:48px;background:#fff}.article-hero{width:100%;max-width:1168px;margin:24px auto 48px;padding:24px 33px 32px;position:relative;border-inline:1px solid #0000000d}.article-hero h1{font-size:48px;line-height:48px;font-weight:400;letter-spacing:-2.4px;max-width:100%;margin:24px 0}.article-hero .subtitle{font-size:24px;line-height:32px;font-weight:400;color:#525252}.article-copy{color:#262626;padding:0;max-width:798px}.article-copy h2{border:0;padding:0;display:flex;align-items:center;gap:12px;line-height:32px;margin:48px 0 24px;font-size:24px;font-weight:500;letter-spacing:-.6px;scroll-margin-top:97px}.heading-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;flex:none;border:1px solid #e5e5e5;border-radius:50%;background:#fff;color:#404040;box-shadow:0 1px 2px #0000000d}.heading-rule{height:1px;flex:1;min-width:20px;background:#e5e5e5;margin-left:4px}.article-copy h2>span:nth-child(2){min-width:0}.right-rail{width:256px;position:sticky;top:96px;max-height:calc(100vh - 112px);display:block;overflow:auto}.right-rail .box{padding:20px;margin-bottom:20px;border-radius:8px;background:#f9fafb;border:1px solid #e5e7eb}.box h2{font-size:16px;line-height:24px;font-weight:600;color:#111827;margin:0 0 12px}.toc a{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:6px;font-size:14px;line-height:20px;color:#374151;margin:4px 0;transition:background-color 150ms,color 150ms}.toc a svg{opacity:.7}.toc a:hover{background:#f3f4f6}.toc a.current{background:#dbeafe;color:#1d4ed8}
.left-rail{padding:16px;width:256px;top:73px;height:calc(100vh - 73px);background:#f9fafbb3;border-right:1px solid #e5e7eb;z-index:10}.left-rail>a{font-size:14px;padding:8px 12px;color:#4b5563;margin:0 0 24px}.rail-group{margin:0 0 24px}.rail-group summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;font-size:12px;line-height:16px;font-weight:500;color:#6b7280;letter-spacing:.6px;text-transform:uppercase;margin:0 0 12px;padding:4px 0}.rail-group summary::-webkit-details-marker{display:none}.chevron{transform:rotate(-90deg);font-size:16px}.rail-group[open] .chevron{transform:rotate(0)}.left-rail .rail-group a{display:flex;align-items:center;gap:8px;padding:8px 12px;font-size:14px;line-height:20px;margin:4px 0;color:#4b5563;transition:background-color 150ms,color 150ms}.rail-group a span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.left-rail .rail-group a:hover{background:#f3f4f6;color:#1f2937}.left-rail .rail-group a[aria-current]{background:#dbeafe;color:#2563eb}
@media(max-width:1200px){header nav{gap:16px}.footer-columns{gap:24px}.footer-top{gap:32px}.footer-intro{max-width:300px}}
@media(max-width:1100px){.article-grid{grid-template-columns:minmax(0,1fr);gap:32px}.right-rail{position:static;width:100%;max-height:none;overflow:visible;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.right-rail .box{margin:0}.right-rail .toc{grid-column:1/-1}.right-rail .toc a{display:flex;margin:4px 0}.article-copy{max-width:none}.article-hero h1{font-size:40px;line-height:44px}.footer-top{flex-direction:column}.footer-intro{max-width:384px}.footer-columns{width:100%;gap:32px}.site-nav a:not(.gapnav){display:none}}
@media(max-width:800px){.nav-inner{padding:16px 24px}#index .hero-inner:before,#index .hero-inner:after{display:none}#index .gallery{padding:0}.gallery-controls{padding:16px 0}.gap-group{padding:16px 0}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:24px}.detail-main{width:100%;margin:0;padding:16px}.article-hero{padding:20px 25px;margin-top:0}.article-hero h1{font-size:36px;line-height:40px;letter-spacing:-1.5px}.article-hero .subtitle{font-size:20px;line-height:28px}.article-grid{padding:24px 16px}.article-copy h2{font-size:20px;line-height:28px}.right-rail{display:block}.right-rail .box{margin-bottom:20px}.footer-inner{padding:0 24px}footer.site-footer,#index footer.site-footer,.detail footer.site-footer{padding:48px 0 80px}.footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.footer-bottom{flex-direction:column;gap:12px}.footer-top{margin-bottom:32px}.card-matte{padding:12px}}
@media(max-width:480px){.card-grid{grid-template-columns:1fr}.article-hero{padding-inline:25px}.heading-rule{min-width:8px}.card-meta span:first-child{max-width:220px}}
.guides{isolation:isolate}#index .hero-inner{isolation:isolate}

/* Follow-up measurements: Aura nav 12/16 regular; gallery headings 18/28 medium. */
body{letter-spacing:-.16px;-webkit-font-smoothing:antialiased}
header nav{gap:0;font-size:12px;line-height:16px;font-weight:400;letter-spacing:-.16px;color:#737373}header nav a{padding:8px 16px;text-transform:uppercase;border-radius:6px;transition:color 150ms}header nav a:hover{color:#171717}header nav a.active{color:#171717}
#index .group-heading h2{font-size:18px;line-height:28px;letter-spacing:-.45px;font-weight:500}
#index .card h3{font-size:14px;line-height:20px;letter-spacing:-.3px;font-weight:500;min-height:40px;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}#index .card-meta{font-size:12px;line-height:18px;min-height:36px;color:#737373}.card-score{margin-top:12px;font-size:12px;line-height:16px;color:#737373}.card-score strong{font-weight:500;color:#525252}.score-track{height:4px;border-radius:2px;background:#f0f0f0;margin-top:10px;overflow:hidden}.score-track i{height:100%;display:block;border-radius:2px;background:#a3a3a3;transition:background-color 350ms cubic-bezier(.4,0,.2,1)}.card:hover .score-track i,.card:focus-visible .score-track i{background:var(--matte)}.score-scale{display:flex;justify-content:space-between;font-size:10px;line-height:14px;margin-top:5px;color:#a3a3a3}
.article-hero .subtitle{font-weight:300;letter-spacing:-.16px}.article-copy p{font-weight:400;letter-spacing:-.16px}.article-copy h3{letter-spacing:-.3px}.article-copy h2{letter-spacing:-.6px}.crumb{scroll-margin-top:97px}
/* Only contents and scores; no nested scrollbar. At shorter heights, let the page scroll naturally. */
.right-rail{overflow:visible;max-height:none}.right-rail .toc a{white-space:nowrap;padding:6px 10px;margin:2px 0;font-size:14px;line-height:20px}.right-rail .metric{margin-top:12px}.right-rail .big-score{font-size:32px;line-height:40px}.right-rail .box p{margin:10px 0}.right-rail .box{padding:20px}.right-rail .toc{margin-bottom:16px}
.left-rail{z-index:15}.rail-group{overflow:hidden}.detail footer.site-footer{z-index:1;border-top:1px solid #e5e5e5}.detail footer .footer-inner{max-width:1400px;padding-left:48px}footer.site-footer,#index footer.site-footer{border-top:1px solid #e5e5e5}
.category-panel{margin:40px 0;padding:24px;border:1px solid #e5e5e5;border-radius:8px;background:#fafafa}.category-panel dl{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:20px 0 0}.category-panel dt{font-size:12px;line-height:20px;color:#737373;margin-bottom:6px}.category-panel dd{font-size:14px;line-height:24px;margin:0;color:#404040}
.sources-illustration{margin:48px 0 32px;border:1px solid #e5e5e5;border-radius:12px;overflow:hidden;background:#fafafa;box-shadow:0 1px 2px #0000000d}.sources-illustration img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}.article-copy .sources-intro{color:#525252}.reference-list{list-style:none;padding:0;margin:28px 0;display:grid;gap:16px}.reference-list li{display:flex;gap:16px;padding:20px;border:1px solid #e5e5e5;border-radius:8px;background:#fafafa}.reference-number{font-size:12px;color:#a3a3a3;padding-top:3px;flex:none}.article-copy .reference-list h3{font-size:16px;font-weight:500;line-height:24px;margin:10px 0 6px}.article-copy .reference-list p{font-size:14px;line-height:24px;color:#525252;margin:8px 0 0}.article-copy .reference-list .reference-author{font-size:12px;line-height:20px;color:#737373;margin:0}.faq-list{display:grid;gap:16px;margin:28px 0}.faq-card{padding:20px;border:1px solid #e5e5e5;border-radius:8px;background:white}.article-copy .faq-card h3{font-size:18px;line-height:28px;font-weight:500;margin:0 0 8px;letter-spacing:-.3px}.article-copy .faq-card p{font-size:16px;line-height:26px;color:#525252;margin:0}.related-callout{margin:40px 0 0;border:1px solid #dce5df;border-radius:12px;padding:24px;background:#f5f8f6}.article-copy .related-callout h3{font-size:20px;line-height:28px;margin:16px 0 12px}.article-copy .related-callout p{font-size:16px;line-height:28px;margin:0 0 20px}.related-callout>a{font-size:14px;font-weight:500;border-bottom:1px solid #a3b9ac;padding-bottom:3px}.related-score{font-size:12px;display:block;color:#737373;margin-top:16px}
@media(max-height:900px){.right-rail{position:static}}
@media(min-width:801px) and (max-width:1663px){.detail footer .footer-inner{width:calc(100% - 256px);margin-left:256px;padding-right:48px}.detail .footer-top{flex-direction:column}.detail .footer-columns{width:100%}}
@media(max-width:1100px){header nav a{padding:8px 12px}}
@media(max-width:800px){.detail footer .footer-inner{width:100%;margin-left:0;padding:0 24px}.category-panel dl{grid-template-columns:1fr}.article-copy .faq-card h3{font-size:18px}.right-rail .toc a{display:flex}.card-matte{padding:12px}}
.reference-list{gap:12px}.reference-list li{padding:12px 16px;background:#fff}.article-copy .reference-list h3{font-size:14px;line-height:20px;font-weight:500;color:#262626}

.nav-inner{max-width:var(--nav-max);padding-inline:var(--nav-inset)}.footer-inner{max-width:var(--footer-max);padding-inline:var(--footer-inset)}
@media(max-width:800px){.nav-inner,.footer-inner{padding-inline:24px}}
/* v4: image-led gallery and compact, legible source citations. */
#index .card{overflow:visible;background:transparent;transition:none;border-color:#0000000d}#index .card:hover{border-color:#0000000d}.card-matte{overflow:visible}.card-picture{box-shadow:0 10px 20px -5px #17211e50,0 3px 7px #17211e25;isolation:isolate}.card-picture img{transition:transform 350ms cubic-bezier(.4,0,.2,1)}.card:hover img{transform:scale(1.035)}.card-shade{position:absolute;inset:0;background:linear-gradient(180deg,transparent 22%,rgba(12,17,20,.15) 40%,rgba(12,17,20,.78) 72%,rgba(12,17,20,.96) 100%);pointer-events:none}.card-caption{position:absolute;left:16px;right:16px;bottom:16px;color:white;pointer-events:none}#index .card-caption h3{font-size:14px;line-height:20px;font-weight:500;letter-spacing:-.3px;min-height:0;margin:0;color:#fff;text-shadow:0 1px 3px #0005;-webkit-line-clamp:2}.card-caption p{font-size:12px;line-height:18px;font-weight:400;letter-spacing:-.16px;color:#f0f1f2;margin:6px 0 0;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}.card-score-pill{position:absolute;top:12px;right:12px;min-width:42px;padding:7px 10px;border-radius:8px;background:#171717e8;border:1px solid #ffffff26;color:white;font-size:14px;line-height:18px;font-weight:500;box-shadow:0 3px 8px #0003;font-variant-numeric:tabular-nums}
.reference-list li{display:block;padding:14px 16px}.reference-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.article-copy .reference-list .reference-heading h3{display:flex;align-items:baseline;gap:10px;min-width:0;font-size:16px;line-height:22px;font-weight:500;margin:0;letter-spacing:-.3px}.reference-number{font-size:13px;line-height:22px;font-weight:400;color:#737373;padding:0;flex:none;font-variant-numeric:tabular-nums}.reference-heading .evidence-type{flex:none;white-space:nowrap;display:inline-flex;align-items:center;font-size:12px;line-height:18px;font-weight:500;padding:3px 9px;border-radius:6px;margin:0;letter-spacing:0}.evidence-review{background:#f0edfa;border-color:#e3dcf3;color:#675389}.evidence-primary{background:#eaf5ee;border-color:#d5e9dd;color:#3d7057}.evidence-abstract{background:#fff5e5;border-color:#f1e1c3;color:#88652d}.article-copy .reference-list .reference-author{font-size:14px;line-height:20px;color:#646464;margin:5px 0 0 28px}.article-copy .reference-list .reference-note{font-size:15px;line-height:22px;color:#525252;margin:4px 0 0 28px}
@media(max-width:600px){.reference-heading{gap:10px;flex-wrap:wrap}.reference-heading h3{flex-basis:100%}.reference-heading .evidence-type{margin-left:28px}.card-caption{left:12px;right:12px;bottom:12px}.reference-list li{padding:14px}}
/* v5: article footer occupies only the area beside the 256px sidebar.
   Its inner grid shares the article surround's centering and reading inset. */
.detail footer.site-footer{width:calc(100% - var(--left-rail));margin-left:var(--left-rail);margin-right:0}
.detail footer.site-footer .footer-inner{width:calc(100% - 16px);max-width:var(--article-surround);margin-left:auto;margin-right:auto;padding-left:33px;padding-right:33px}
@media(max-width:800px){.detail footer.site-footer{width:100%;margin-left:0}.detail footer.site-footer .footer-inner{width:100%;padding-left:24px;padding-right:24px}}

/* Post-only surface colors. Index footer keeps its existing fill. */
.detail .left-rail{background:#FBFCFC}
.detail footer.site-footer{background:transparent}
/* v7: measured Aura learn-footer typography, shared by both footers. */
.site-footer{font-family:Inter,sans-serif;font-size:14px;font-weight:400;line-height:20px;letter-spacing:-.16px}
.site-footer .footer-intro p,.site-footer .footer-column a,.site-footer .footer-bottom,.site-footer .footer-bottom p{font-family:Inter,sans-serif;font-size:14px;font-weight:400;line-height:20px;letter-spacing:-.16px;color:#4B5563}
.site-footer .footer-column h2{font-family:Inter,sans-serif;font-size:10px;font-weight:100;line-height:15px;letter-spacing:-.3px;color:#737373;text-transform:uppercase;margin:0 0 12px}
.site-footer .footer-column a{margin:0;transition:none}.site-footer .footer-column a+a{margin-top:8px}
.site-footer .footer-column a:hover,.site-footer .footer-column a:focus-visible{color:#111827}
.site-footer .footer-intro strong{font-family:Inter,sans-serif;font-weight:400;letter-spacing:-.16px}