:root{--pv-paper:#f5f3ed;--pv-ink:#203831;--pv-muted:#566159;--pv-line:#d6d9cf;--pv-green:#38763e;--pv-blue:#005ca6;--pv-orange:#ad570e;--pv-sage:#e6eadf;--pv-white:#fffef9}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;color:var(--pv-ink);background:var(--pv-paper);font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit}img{max-width:100%;height:auto}button,input,select,textarea{font:inherit}button,summary{cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--pv-blue);outline-offset:4px}::selection{background:#d3e2cb}p{overflow-wrap:break-word}button,a,input,select,textarea{touch-action:manipulation}
.pv-skip{position:absolute;left:20px;top:-120px;z-index:100;padding:16px;background:var(--pv-white);color:var(--pv-ink)}.pv-skip:focus{top:10px}.pv-header{position:relative;z-index:30;display:flex;align-items:center;gap:22px;max-width:1600px;margin:auto;padding:22px 4.5%;border-bottom:1px solid var(--pv-line);background:var(--pv-paper);font-size:12px;line-height:1.4}.pv-header a{text-decoration:none;white-space:nowrap}.pv-identity{display:flex;align-items:center;gap:16px}.pv-identity img{width:104px;height:auto;display:block;border-radius:0}.pv-identity>span{font-size:12px;letter-spacing:1.2px;font-weight:700}.pv-identity small{display:block;font-size:8px;letter-spacing:1.6px;color:var(--pv-muted);margin-top:6px;font-weight:400}.pv-desktop{margin-left:auto;display:flex;gap:19px}.pv-desktop a{padding:11px 0;position:relative}.pv-header a[aria-current=page]{color:var(--pv-ink)}.pv-desktop a[aria-current=page]:after{content:'';position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--pv-ink)}.pv-utilities{display:flex;align-items:center;gap:13px;color:var(--pv-muted);font-size:11px}.pv-contact{padding:11px 0;border-bottom:1px solid var(--pv-ink)}.pv-contact span{margin-left:15px}.pv-header a:hover{color:var(--pv-orange)}.pv-mobile{display:none}.pv-footer{padding:64px max(24px,calc((100% - 1200px)/2));border-top:1px solid var(--pv-line);background:#e8eadd;margin-top:64px;font-size:14px}.pv-footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:45px}.pv-footer-name{font:italic 34px Georgia,serif;text-decoration:none;display:flex;align-items:center;gap:28px}.pv-footer p{font-size:14px;line-height:1.8;color:var(--pv-muted)}.pv-footer nav{display:flex;flex-direction:column;gap:18px;padding-top:8px}.pv-footer nav a{text-decoration:none}.pv-footer-bottom{display:flex;align-items:center;gap:24px;border-top:1px solid #c7ccbd;padding-top:24px;font-size:12px;color:var(--pv-muted)}.pv-footer-bottom>span{margin-right:auto}.pv-footer a:hover{text-decoration:underline}
.pv-main.seo-main{width:100%;max-width:1296px;margin:0 auto;padding:30px 48px 70px}.pv-main h1{font-size:clamp(38px,5.8vw,76px);font-weight:400;line-height:1.08;letter-spacing:-2.8px;margin:22px 0 26px}.pv-main h2{font-size:clamp(28px,3.3vw,43px);font-weight:400;letter-spacing:-1.4px;line-height:1.18;margin:0 0 22px}.pv-main h3{font-size:22px;line-height:1.35;letter-spacing:-.4px;font-weight:500;margin:0 0 12px}.pv-main p,.pv-main li{font-size:16px;line-height:1.85}.pv-main em{font-family:Georgia,'Times New Roman',serif;font-weight:400}.pv-main .crumbs{padding:0 0 24px;border-bottom:1px solid var(--pv-line);margin-bottom:42px}.pv-main .crumbs li{font-size:12px}.pv-main .pv-eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;margin:0 0 20px;color:var(--pv-muted)}.pv-main .pv-lede{font-size:19px;color:var(--pv-muted);line-height:1.8;max-width:65ch}.pv-section{padding:62px 0;border-top:1px solid var(--pv-line);margin-top:48px}.pv-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.pv-card{padding:28px;border:1px solid var(--pv-line);background:var(--pv-white)}.pv-card p{font-size:15px;color:var(--pv-muted)}.pv-button{display:inline-flex;align-items:center;justify-content:center;gap:24px;padding:15px 22px;background:var(--pv-ink);border:1px solid var(--pv-ink);color:var(--pv-paper);text-decoration:none;font-size:13px;line-height:1.5;min-height:48px}.pv-button:hover{background:#344f42;color:var(--pv-paper)}.pv-button.secondary{background:transparent;color:var(--pv-ink)}.pv-button.secondary:hover{background:var(--pv-sage)}.pv-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}.pv-main :is(input,select,textarea){max-width:100%;border:1px solid #a9b5a8;background:var(--pv-white);color:var(--pv-ink);padding:13px 14px;line-height:1.4;border-radius:0;min-height:48px}.pv-main form label{font-size:12px;color:var(--pv-muted)}.pv-main figure{margin:26px 0}.pv-main figcaption{font-size:12px;line-height:1.7;color:var(--pv-muted);margin-top:10px}.pv-main svg{max-width:100%}.pv-main .topic-strip{margin:26px 0;gap:8px}.pv-main .topic-strip a{font-size:12px;padding:10px 14px}.pv-main .seo-cards{grid-template-columns:repeat(3,minmax(0,1fr))}.pv-main .seo-card{border-radius:0}.pv-main .seo-card img{border-radius:0}
/* An editorial library: a clear first view, then a finite page of articles. */
.pv-news-hero{display:grid;grid-template-columns:1.05fr 1fr;gap:70px;align-items:center;padding:35px 0 65px}.pv-news-hero h1{font-size:clamp(48px,6.5vw,86px);line-height:1.02;margin-top:16px}.pv-news-hero h1 em{display:block}.pv-news-hero>div>p:not(.pv-eyebrow){color:var(--pv-muted);font-size:17px;max-width:45ch}.pv-news-hero .pv-hero-index{display:flex;gap:32px;border-top:1px solid var(--pv-line);padding-top:22px;margin-top:30px}.pv-hero-index span{font-size:12px;color:var(--pv-muted)}.pv-hero-index strong{font-weight:400;font-size:28px;display:block;color:var(--pv-ink);margin-bottom:6px}.pv-featured{background:var(--pv-ink);color:var(--pv-paper);padding:22px;display:block;text-decoration:none;position:relative}.pv-featured>span{display:flex;justify-content:space-between;font-size:10px;letter-spacing:1.8px;margin:2px 0 20px}.pv-featured img{width:100%;aspect-ratio:1200/630;object-fit:contain;background:var(--pv-white);display:block;border-radius:0}.pv-featured h2{font-size:26px;line-height:1.3;color:var(--pv-paper);letter-spacing:-.5px;margin:22px 0 12px}.pv-featured p{font-size:13px!important;color:#ced7cb;line-height:1.7;max-width:none!important}.pv-featured:hover h2{text-decoration:underline}.pv-featured .pv-featured-more{display:block;font-size:12px;padding-top:18px;margin-top:20px;border-top:1px solid #607467}
.pv-library-nav{display:flex;gap:9px;flex-wrap:wrap;border-top:1px solid var(--pv-line);padding-top:26px}.pv-library-nav a{padding:12px 18px;border:1px solid var(--pv-line);text-decoration:none;font-size:13px}.pv-library-nav a[aria-current=page]{background:var(--pv-ink);border-color:var(--pv-ink);color:var(--pv-paper)}.pv-filter{display:grid;grid-template-columns:2fr 1fr 1fr 1fr auto;gap:12px;align-items:end;margin:24px 0 20px;padding:25px 0;border-bottom:1px solid var(--pv-line)}.pv-filter label{display:grid;gap:9px}.pv-filter input,.pv-filter select{width:100%;min-width:0;font-size:14px}.pv-filter button{font-size:13px}.pv-results-bar{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:12px 0 28px}.pv-results-bar p{margin:0;color:var(--pv-muted);font-size:13px}.pv-results-bar a{font-size:13px}.pv-news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px 26px}.pv-story{display:flex;flex-direction:column;min-width:0}.pv-story>a{display:flex;flex-direction:column;height:100%;text-decoration:none;color:var(--pv-ink)}.pv-story img{display:block;width:100%;height:auto;aspect-ratio:1200/630;object-fit:contain;background:var(--pv-white);border:1px solid var(--pv-line);border-radius:0;margin:0 0 20px;padding:0}.pv-story .pv-story-category{font-size:10px;color:var(--pv-muted);letter-spacing:1.1px;text-transform:uppercase;line-height:1.6;margin:0 0 10px}.pv-story h2{font-size:23px;line-height:1.35;letter-spacing:-.5px;margin:0 0 12px}.pv-story .pv-story-excerpt{font-size:14px;color:var(--pv-muted);line-height:1.8;margin:0 0 20px;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.pv-story .pv-story-meta{font-size:11px;line-height:1.7;color:var(--pv-muted);margin-top:auto;padding-top:15px;border-top:1px solid var(--pv-line)}.pv-story:hover h2{text-decoration:underline;text-underline-offset:4px}.pv-pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:50px 0 18px}.pv-pagination a,.pv-pagination span{display:flex;min-width:44px;min-height:44px;align-items:center;justify-content:center;font-size:13px;border:1px solid var(--pv-line);padding:8px 14px;text-decoration:none}.pv-pagination [aria-current=page]{background:var(--pv-ink);color:var(--pv-paper);border-color:var(--pv-ink)}.pv-empty{padding:45px 0 65px}.pv-empty p{color:var(--pv-muted)}.pv-library-end{padding:38px;background:var(--pv-sage);display:grid;grid-template-columns:1.4fr 1fr;gap:40px;margin-top:55px}.pv-library-end p{font-size:15px;color:var(--pv-muted)}.pv-library-end h2{font-size:30px}.pv-library-end>div:last-child{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:16px}
/* Both generations of research use the same public reading experience. */
.pv-reader.seo-main{max-width:1160px}.pv-reader>.pv-reader-heading{max-width:920px;margin:0 auto 35px}.pv-reader-heading h1{font-size:clamp(34px,4.5vw,58px);letter-spacing:-1.8px;line-height:1.15}.pv-reader-heading .pv-lede{font-size:18px}.pv-reader-meta{display:flex;gap:20px;flex-wrap:wrap;color:var(--pv-muted);font-size:12px;border-top:1px solid var(--pv-line);padding-top:18px}.pv-reader-body{max-width:800px;margin:auto}.pv-reader-body>article{display:contents}.pv-reader-body p,.pv-reader-body li{font-size:17px;line-height:1.95;max-width:75ch}.pv-reader-body h2{font-size:31px;letter-spacing:-.7px;line-height:1.3;margin:50px 0 20px;scroll-margin-top:32px}.pv-reader-body h3{font-size:23px;margin-top:30px}.pv-reader-body .research-toc{background:var(--pv-sage);border:0;border-radius:0;padding:25px;margin:28px 0 40px}.pv-reader-body .research-toc summary{font-size:15px;font-weight:500}.pv-reader-body .research-toc li{font-size:14px;line-height:1.7}.pv-reader-body .research-toc a{text-decoration:none;padding:6px 0}.pv-reader-body .research-cover{display:block;width:100%;height:auto;aspect-ratio:1200/630;object-fit:contain;background:var(--pv-white);padding:0;border-radius:0;border:1px solid var(--pv-line);margin:25px 0 40px}.pv-reader-body .research-figure img{padding:0;border-radius:0}.pv-reader-body blockquote{margin:30px 0;padding:24px 30px;border-left:3px solid var(--pv-green);background:var(--pv-sage)}.pv-reader-body .sources{overflow-wrap:anywhere;font-size:13px}.pv-reader-body .sources h3{font-size:20px}.pv-reader-body .sources li{font-size:13px}.pv-reader-body .research-related{margin:56px 0}.pv-reader-body .seo-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.pv-reader-body .seo-card h3{font-size:18px;margin:0}.pv-reader-body .seo-card p{font-size:13px;line-height:1.7}.pv-reader-body table{width:100%;border-collapse:collapse}.pv-reader-body :is(th,td){padding:12px;border:1px solid var(--pv-line);text-align:left}.pv-reader-body :is(pre,table){max-width:100%}.pv-reader-body pre{overflow:auto}.pv-reader-body a{text-underline-offset:3px}.pv-reader-body .research-date{font-size:12px}.pv-reader-body .meta{font-size:12px;color:var(--pv-muted)}
@media(max-width:1250px){.pv-header{gap:17px}.pv-desktop{gap:14px}.pv-utilities{gap:10px}.pv-identity img{width:84px}.pv-identity>span{font-size:11px}.pv-identity small{font-size:7px}.pv-header{font-size:11px}.pv-utilities{font-size:10px}}
@media(max-width:1100px){.pv-desktop,.pv-utilities,.pv-header>.pv-contact{display:none}.pv-header{justify-content:space-between;padding:20px 5%}.pv-identity img{width:104px}.pv-identity>span{font-size:12px}.pv-identity small{font-size:8px}.pv-mobile{display:block}.pv-mobile summary{display:flex;gap:14px;align-items:center;list-style:none;min-height:44px;padding:10px 0;font-size:13px}.pv-mobile summary::-webkit-details-marker{display:none}.pv-mobile summary>span:last-child{font-size:23px}.pv-mobile nav{position:absolute;z-index:40;top:100%;left:0;right:0;padding:16px 5% 24px;background:var(--pv-paper);border-bottom:1px solid var(--pv-line);box-shadow:0 16px 22px #20383114;display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.pv-mobile:not([open]) nav{display:none}.pv-mobile nav>a{display:block;padding:15px 0;border-bottom:1px solid var(--pv-line);font-size:15px}.pv-mobile nav a[aria-current=page]{font-weight:700}.pv-mobile-utilities{grid-column:1/-1;display:flex;gap:25px;flex-wrap:wrap;padding-top:20px;font-size:13px}.pv-mobile-utilities a{min-height:32px}.pv-filter{grid-template-columns:2fr 1fr 1fr}.pv-filter>label:first-child{grid-column:1/-1}.pv-news-hero{gap:36px}.pv-main.seo-main{padding-left:32px;padding-right:32px}.pv-news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.pv-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){html{scroll-padding-top:24px}.pv-main.seo-main{padding:24px 6% 45px}.pv-main .crumbs{margin-bottom:30px;padding-bottom:20px}.pv-main h1{font-size:42px;letter-spacing:-1.5px}.pv-main h2{font-size:31px;letter-spacing:-.9px}.pv-main .pv-lede{font-size:17px}.pv-main .pv-eyebrow{font-size:10px;letter-spacing:1.5px}.pv-header{padding:13px 6%;gap:15px}.pv-identity{gap:10px}.pv-identity img{width:84px}.pv-identity>span{font-size:10px;letter-spacing:.8px}.pv-identity small{font-size:6px;letter-spacing:1.2px;margin-top:5px}.pv-mobile summary>span:first-child{display:none}.pv-mobile nav{padding-left:6%;padding-right:6%}.pv-mobile nav>a{font-size:13px}.pv-footer{padding:45px 6%;margin-top:35px}.pv-footer-top{grid-template-columns:1fr 1fr;gap:28px 18px;padding-bottom:30px}.pv-footer-top>div:first-child{grid-column:1/-1}.pv-footer nav{gap:17px;font-size:12px}.pv-footer-name{font-size:30px}.pv-footer-bottom{flex-wrap:wrap;gap:20px}.pv-footer-bottom>span{width:100%;font-size:11px;line-height:1.8}.pv-footer-bottom a{font-size:12px;min-height:36px}.pv-section{padding:38px 0;margin-top:32px}.pv-grid{grid-template-columns:1fr}.pv-card{padding:24px}.pv-news-hero{grid-template-columns:1fr;gap:30px;padding:10px 0 38px}.pv-news-hero h1{font-size:54px;letter-spacing:-2px}.pv-news-hero>div>p:not(.pv-eyebrow){font-size:16px}.pv-featured{padding:18px}.pv-featured h2{font-size:24px}.pv-featured p{font-size:13px}.pv-news-hero .pv-hero-index{gap:28px;margin-top:25px;padding-top:18px}.pv-hero-index strong{font-size:24px}.pv-library-nav{gap:6px}.pv-library-nav a{font-size:11px;padding:12px 13px}.pv-filter{grid-template-columns:1fr 1fr;gap:14px;padding-top:18px}.pv-filter input,.pv-filter select{font-size:16px;padding:12px 10px}.pv-filter button{width:100%;font-size:13px}.pv-filter>label:nth-child(4){grid-column:1/-1}.pv-filter>button{grid-column:1/-1}.pv-results-bar{padding:8px 0 26px;align-items:flex-start}.pv-results-bar p,.pv-results-bar a{font-size:12px}.pv-news-grid{grid-template-columns:1fr;gap:35px}.pv-story h2{font-size:24px}.pv-story .pv-story-excerpt{font-size:15px}.pv-pagination{gap:6px;margin-top:35px}.pv-pagination a,.pv-pagination span{padding:8px 12px}.pv-library-end{grid-template-columns:1fr;gap:18px;padding:26px;margin-top:38px}.pv-library-end h2{font-size:29px}.pv-main .seo-cards{grid-template-columns:1fr}.pv-reader-heading h1{font-size:36px;letter-spacing:-1.2px}.pv-reader-body p,.pv-reader-body li{font-size:16px;line-height:1.9}.pv-reader-body h2{font-size:28px;margin-top:40px}.pv-reader-body .research-toc{padding:20px}.pv-reader-body .seo-cards{grid-template-columns:1fr}.pv-reader-meta{gap:10px 18px}.pv-main :is(input,textarea,select){font-size:16px}}
@media(max-width:360px){.pv-identity img{width:67px}.pv-identity>span{font-size:9px}.pv-identity small{font-size:6px;letter-spacing:.7px}.pv-news-hero h1{font-size:48px}.pv-main h1{font-size:36px}.pv-mobile nav{gap:0 12px}.pv-mobile nav>a{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

.pv-footer{display:block}.pv-reader-body>article>h1{font-size:clamp(34px,4.5vw,58px);line-height:1.17;letter-spacing:-1.5px;font-weight:400}.pv-reader-body .meta{margin-bottom:14px}.pv-reader-body .crumbs{margin-bottom:24px}.pv-reader-body .research-figure figcaption{font-size:12px;line-height:1.8}