:root{--ink:#152f43;--text:#354854;--muted:#596b77;--line:#dce4e8;--blue:#24798b;--pale:#f0f6f8;--font:Arial,Helvetica,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:#fff;color:var(--text);font-family:var(--font);font-size:18px;line-height:1.7}a{color:var(--blue);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid #d17c2e;outline-offset:5px}.skip{position:absolute;left:16px;top:-100px;background:white;padding:10px;z-index:10}.skip:focus{top:10px}.masthead{max-width:1080px;margin:auto;padding:26px 30px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.wordmark{font-family:Georgia,serif;font-size:25px;font-weight:bold;text-decoration:none;color:var(--ink);letter-spacing:-.8px}.period{color:var(--blue)}.moon{font-size:28px;margin-right:8px}.header-note{font-size:13px;color:var(--muted)}main{max-width:790px;padding:58px 30px 0;margin:auto}.eyebrow,.section-label{font-size:12px;font-weight:700;letter-spacing:1.5px;color:var(--blue)}.eyebrow span{padding:0 8px;color:#9caeb8}h1,h2{font-family:Georgia,'Times New Roman',serif;color:var(--ink);font-weight:400;letter-spacing:-1.1px;line-height:1.15}h1{font-size:51px;margin:20px 0 24px}h1 em{font-weight:400;color:var(--blue)}.dek{font-size:20px;line-height:1.6;max-width:610px;margin-bottom:26px}.disclosure{font-size:13px;line-height:1.6;color:var(--muted);padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.disclosure strong{font-weight:600;margin-right:5px}.answer{margin:32px 0 48px;background:var(--pale);border-left:3px solid var(--blue);padding:25px 29px}.answer p{font-size:19px;margin:10px 0 14px;line-height:1.65;color:var(--ink)}.text-link{font-size:14px;font-weight:700;text-decoration:none}.text-link span{margin-left:10px}section{margin:0 0 45px}.section-label{margin-bottom:13px;color:var(--muted);font-size:11px}h2{font-size:33px;margin:0 0 20px}p{margin:0 0 20px}.ref{font-size:12px;white-space:nowrap;text-decoration:none;vertical-align:super}h3{font-size:18px;line-height:1.4;color:var(--ink);margin:0 0 8px}.health-note{display:flex;gap:15px;background:#faf6ed;border:1px solid #e6dcc4;border-radius:4px;margin-top:27px;padding:23px}.health-note p{font-size:16px;margin:0;line-height:1.65}.note-icon{border:1.5px solid #98752e;color:#886526;border-radius:50%;flex:none;width:24px;height:24px;line-height:21px;text-align:center;font-weight:700}.options{border-top:1px solid var(--line);margin-top:24px}.option{display:flex;gap:23px;padding:24px 0;border-bottom:1px solid var(--line)}.option-number{font-family:Georgia,serif;font-size:25px;color:#7f9baa;line-height:1.3}.option p{font-size:16px;line-height:1.65;margin-bottom:8px}.option p:last-child{margin-bottom:0}.limitation{color:var(--muted);font-size:14px!important}.limitation strong{font-weight:600}.mechanism{margin:26px 0;background:var(--pale);border:1px solid var(--line);border-radius:5px;padding:23px 22px 19px}.figure-heading{font-size:16px;font-weight:bold;color:var(--ink)}.mechanism svg{display:block;width:100%;height:auto;margin:10px 0}.svg-label{font:600 15px Arial;fill:#152f43}.svg-small{font:12px Arial;fill:#354854}figcaption{font-size:12px;line-height:1.6;color:var(--muted);border-top:1px solid var(--line);padding-top:13px}.button{background:var(--ink);color:white;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:36px;padding:14px 23px;min-height:52px;font-size:16px;font-weight:600;border-radius:4px;transition:background .15s}.button:hover{background:#245770}.button span{font-size:20px;line-height:1}.cta-note{font-size:12px;display:block;color:var(--muted);margin-top:9px;line-height:1.5}.inline-cta{margin:28px 0 0}.closing{background:var(--ink);color:#e0e9ee;padding:35px 37px;border-radius:5px;margin:45px 0}.closing .eyebrow{color:#a9d8e2}.closing h2{color:#fff;margin:12px 0 16px}.closing p{font-size:17px;line-height:1.7}.closing .button{background:#fff;color:var(--ink)}.closing .button:hover{background:#ddecf0}.closing .cta-note{color:#c6d7e0}.sources{border-top:1px solid var(--line);padding-top:29px}.sources h2{font-family:var(--font);font-size:17px;letter-spacing:0;font-weight:600;margin-bottom:13px}.sources p,.sources li{font-size:13px;line-height:1.7}.sources ol{padding-left:19px}.sources li{padding-left:4px;margin:8px 0}.sources a{color:var(--muted)}.sources li:target{background:#edf5f7;outline:5px solid #edf5f7}.source-date{color:var(--muted)}footer{max-width:1080px;border-top:1px solid var(--line);margin:50px auto 0;padding:27px 30px 35px}.footer-top{display:flex;align-items:center;justify-content:space-between;gap:20px}footer .wordmark{font-size:21px}footer nav{display:flex;gap:25px}footer nav a{font-size:13px;color:var(--muted)}footer p{font-size:12px;color:var(--muted);margin:13px 0 0}.utility{min-height:65vh}.utility h1{font-size:42px}.utility .notice{background:var(--pale);padding:20px;border-left:3px solid var(--blue)}@media(max-width:600px){body{font-size:17px}.masthead{padding:18px 22px}.wordmark{font-size:23px}.header-note{display:none}main{padding:36px 22px 0}.eyebrow{font-size:10px;letter-spacing:1.3px}h1{font-size:37px;letter-spacing:-1px;margin-top:18px}h1 br{display:none}.dek{font-size:18px}.disclosure{font-size:12px}.answer{padding:21px 22px;margin:26px 0 36px}.answer p{font-size:17px}h2{font-size:29px}.section-label{font-size:10px}.health-note{padding:19px 17px;gap:11px}.health-note p{font-size:15px}.option{gap:17px}.mechanism{padding:18px 10px 14px}.figure-heading{padding-left:7px;font-size:15px}.mechanism svg{min-height:170px}.mechanism figcaption{margin:0 7px}.button{width:100%;gap:25px}.cta-note{text-align:center}.closing{padding:28px 24px}.closing h2{font-size:29px}section{margin-bottom:36px}footer{padding:24px 22px}.footer-top{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

.diagram-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px}.diagram-pair svg{min-height:0}.diagram-pair svg:first-child{border-right:1px solid var(--line)}@media(max-width:600px){.diagram-pair{grid-template-columns:1fr;max-width:260px;margin:auto;gap:0}.diagram-pair svg:first-child{border-right:0;border-bottom:1px solid var(--line);padding-bottom:15px}.diagram-pair svg{margin:10px 0}}
/* Editorial homepage */
.site-nav{display:flex;gap:24px;flex-wrap:wrap}.site-nav a{font-size:14px;color:var(--ink);padding:8px 0}.home{max-width:1080px;padding-top:34px}.home-kicker{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:20px}.home-kicker>span:last-child{font-size:12px;color:var(--muted)}.home-intro{padding:34px 0 12px;margin:0}.home-intro h1{font-size:62px;line-height:1.12;letter-spacing:-2px;margin:12px 0 24px}.home-intro .dek{max-width:640px}.feature-story{display:grid;grid-template-columns:1.6fr 1fr;margin:30px 0 60px;border-top:3px solid var(--ink);border-bottom:1px solid var(--line);background:var(--pale)}.feature-main{padding:36px}.feature-main h2{font-size:39px;margin:18px 0}.feature-main h2 a{color:var(--ink);text-decoration:none}.feature-main h2 a:hover{text-decoration:underline}.feature-main p{font-size:17px}.read-story{font-size:16px;font-weight:bold;display:inline-flex;gap:26px;padding:8px 0}.feature-index{padding:38px 30px;border-left:1px solid var(--line)}.feature-index>a{display:flex;gap:15px;align-items:baseline;border-bottom:1px solid var(--line);padding:17px 0;font-size:15px;text-decoration:none;color:var(--ink)}.feature-index>a:hover{text-decoration:underline}.feature-index>a span{font-family:Georgia,serif;color:var(--blue);font-size:20px}.desk-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:25px}.desk-heading h2{font-size:30px;margin:0}.desk-heading>span{font-size:13px;color:var(--muted)}.reading-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.reading-grid>a{display:flex;flex-direction:column;text-decoration:none;color:var(--text);padding:22px 0;border-top:1px solid var(--line)}.reading-grid h3{font-family:Georgia,serif;font-weight:400;font-size:27px;line-height:1.2;margin:15px 0}.reading-grid p{font-size:16px;line-height:1.6}.read-label{font-size:14px;color:var(--blue);margin-top:auto;text-decoration:underline;text-underline-offset:4px}.reading-grid>a:hover h3{text-decoration:underline}.editor-note{display:grid;grid-template-columns:1fr 2fr;gap:30px;border-top:1px solid var(--line);padding-top:36px;margin-top:46px}.editor-note h2{font-size:30px}.editor-note p{font-size:17px}.editor-note a{font-size:15px}footer nav{flex-wrap:wrap}footer nav a{padding:8px 0}.utility h2{margin-top:36px}.masthead{gap:20px}@media(max-width:700px){.masthead{flex-wrap:wrap}.site-nav{gap:20px}.home-kicker>span:last-child{display:none}.home-intro{padding:22px 0 5px}.home-intro h1{font-size:42px;letter-spacing:-1.4px}.home-intro .dek{font-size:18px}.feature-story{grid-template-columns:1fr;margin-top:22px;margin-bottom:38px}.feature-main{padding:25px}.feature-main h2{font-size:32px}.feature-index{border-left:0;border-top:1px solid var(--line);padding:24px 25px}.desk-heading{display:block}.desk-heading>span{display:block;margin-top:10px}.reading-grid{grid-template-columns:1fr;gap:4px}.reading-grid h3{margin:12px 0}.editor-note{grid-template-columns:1fr;gap:18px}.home{padding-top:23px}footer nav{gap:16px}}
/* Compact Search opening and optional sticky offer; editorial home unchanged. */
.advertorial-label{text-align:center;font-size:12px;line-height:1.5;letter-spacing:1px;color:var(--muted);padding:6px 16px;background:var(--pale)}
.search-landing main{padding-top:30px}.search-landing h1{max-width:650px;margin:15px 0 22px}.search-landing .answer{margin-top:0}.mouthpiece-link{font-weight:700;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;color:#125b70;background:#ddecf1;box-decoration-break:clone;-webkit-box-decoration-break:clone;padding:1px 3px}.search-landing .answer .quick-disclosure{font-size:14px;line-height:1.5;color:var(--text);margin:12px 0}.sticky-snore[hidden]{display:none}.sticky-snore{position:fixed;bottom:0;left:0;right:0;z-index:20;background:white;border-top:1px solid var(--line);box-shadow:0 -3px 18px #152f4310;padding:12px 22px max(12px,env(safe-area-inset-bottom))}.sticky-inner{max-width:900px;margin:auto;display:flex;align-items:center;gap:20px}.sticky-copy{flex:1}.sticky-copy strong{font-size:16px;display:block;line-height:1.4;color:var(--ink)}.sticky-copy span{display:block;font-size:13px;line-height:1.5;color:var(--muted);margin-top:3px}.sticky-dismiss{width:44px;height:44px;flex:none;background:none;border:0;color:var(--muted);font-size:28px;cursor:pointer}.sticky-dismiss:focus-visible{outline:3px solid #d17c2e}.search-landing{scroll-padding-bottom:180px}.search-landing footer{padding-bottom:40px}@media(max-width:600px){.search-landing .masthead{padding:10px 20px}.search-landing main{padding:20px 20px 0}.search-landing h1{font-size:34px;line-height:1.12;margin:12px 0 19px}.search-landing .answer{padding:18px 19px;margin-bottom:30px}.search-landing .answer>p:first-of-type{font-size:17px;line-height:1.55;margin:8px 0}.sticky-snore{padding:10px 16px max(10px,env(safe-area-inset-bottom))}.sticky-inner{display:grid;grid-template-columns:minmax(0,1fr) 44px;gap:8px}.sticky-copy strong{font-size:14px}.sticky-copy span{font-size:12px}.sticky-inner>.button{grid-column:1/-1;grid-row:2;min-height:46px;padding:10px 16px}.sticky-dismiss{grid-column:2;grid-row:1}.sticky-copy{grid-column:1;grid-row:1}}