/* W443 — approved homepage, isolated from all calculator stylesheets. */
:root{color-scheme:light;--h-bg:#fff;--h-surface:#fff;--h-soft:#f5f8fc;--h-title:#000066;--h-text:#14254a;--h-muted:#536b8d;--h-line:#dce6f1;--h-blue:#0865ff;--h-focus:#0865ff;--h-shadow:0 12px 36px #152d4f18}
html.st-home-dark{color-scheme:dark;--h-bg:#0c1b2c;--h-surface:#13263c;--h-soft:#19334d;--h-title:#d5e8ff;--h-text:#d5e5f8;--h-muted:#adc3dc;--h-line:#36506e;--h-blue:#83b9ff;--h-focus:#83b9ff;--h-shadow:0 12px 36px #0005}
html{scroll-behavior:smooth;scroll-padding-top:100px}
.home443,.home443 *{box-sizing:border-box}
.home443{margin:0;background:var(--h-bg);color:var(--h-text);font-family:Arial,Helvetica,sans-serif;font-size:15px;line-height:1.45;-webkit-font-smoothing:antialiased}
.home443 a{color:inherit}
.home443 button,.home443 input{font:inherit}
.home443 button{cursor:pointer}
.home443 .container,.home443 .header-main{width:min(1180px,calc(100% - 64px));margin-inline:auto}
.home443 img{display:block;max-width:100%}
.home443 figure{margin:0}
.home443 :is(a,button,input,summary):focus-visible{outline:3px solid var(--h-focus);outline-offset:4px}
.h443-skip{position:fixed;top:-100px;left:20px;z-index:1000;background:var(--h-surface);padding:12px 20px;border:1px solid var(--h-line)}
.h443-skip:focus{top:10px}
/* Existing ST identity and navigation. */
.home443 .site-header{position:sticky;top:0;z-index:100;background:var(--h-bg);border-bottom:1px solid var(--h-line)}
.home443 .header-main{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:22px;align-items:center;min-height:80px;position:relative}
.home443 .brand{display:flex;flex-direction:column;align-items:flex-start;gap:3px;text-decoration:none;white-space:nowrap}
.home443 .st-brand-logo{width:328px;height:auto;aspect-ratio:1884/255;object-fit:contain}
.home443 .st-brand-night{display:none}
.home443 .st-slogan{font-size:11px;color:var(--h-muted);line-height:1.25;padding-left:70px}
html.st-home-dark .home443 .st-brand-day{display:none}
html.st-home-dark .home443 .st-brand-night{display:block}
.home443 .topnav{display:flex;align-items:center;justify-content:flex-end;gap:18px;min-width:0;white-space:nowrap}
.home443 .navitem{position:static}
.home443 .navbtn,.home443 .sources{display:inline-flex;align-items:center;gap:6px;appearance:none;border:0;background:transparent;text-decoration:none;padding:12px 0;color:var(--h-text);font-size:14px;line-height:1.3}
.home443 .navbtn:hover,.home443 .sources:hover,.home443 .navitem.open>.navbtn{color:var(--h-blue)}
.home443 .chev{display:block;width:5px;height:5px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);margin-top:-3px}
.home443 .navitem.open .chev{transform:rotate(225deg);margin-top:3px}
.home443 .theme{display:grid;place-items:center;border:0;background:transparent;color:var(--h-text);width:32px;height:40px;border-radius:6px;padding:0}
.home443 .theme:hover{background:var(--h-soft)}
.home443 .theme svg{width:20px;height:20px}
.home443 .dropdown{display:none;position:absolute;right:0;top:calc(100% - 1px);width:min(760px,100%);max-height:calc(100dvh - 110px);overflow:hidden;background:var(--h-surface);border:1px solid var(--h-line);border-radius:8px;box-shadow:var(--h-shadow);text-align:left;white-space:normal}
.home443 .navitem.open>.dropdown{display:block}
.home443 .drophead{padding:16px 20px;border-bottom:1px solid var(--h-line);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--h-muted)}
.home443 .dropbody{max-height:min(490px,calc(100dvh - 220px));overflow-y:auto;overscroll-behavior:contain;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));padding:8px}
.home443 #stToolMenu .dropbody{align-items:start}
.home443 .family{padding:10px 8px;border-bottom:1px solid var(--h-line);min-width:0}
.home443 .family-title{font-size:13px;color:var(--h-title);font-weight:700;margin:0 8px 8px}
.home443 .drop-link{display:block;padding:8px;color:var(--h-muted);font-size:13px;text-decoration:none;line-height:1.4;overflow-wrap:anywhere}
.home443 .drop-link:hover{color:var(--h-blue);background:var(--h-soft)}
.home443 .viewall{display:flex;justify-content:space-between;padding:14px 20px;border-top:1px solid var(--h-line);text-decoration:none;font-size:13px;color:var(--h-blue)}
/* Hero: retain text, search, familiar collage, and actual live counts. */
.home443 .hero{border-bottom:1px solid var(--h-line)}
.home443 .st-hero-layout{display:grid;grid-template-columns:53% 47%;align-items:center;min-height:530px;padding-block:18px 24px;gap:0}
.home443 .st-hero-copy{position:relative;z-index:2;padding:14px 0 16px;min-width:0}
.home443 .eyebrow{color:var(--h-blue);font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}
.home443 .hero h1{font-size:clamp(36px,3.8vw,52px);line-height:1.1;letter-spacing:-1.55px;color:var(--h-title);margin:20px 0 20px;font-weight:700}
.home443 .hero h1 span{display:block}
.home443 .hero p{font-size:16px;line-height:1.6;color:var(--h-muted);margin:0;max-width:630px}
.home443 .hero-search-wrap{position:relative;margin-top:25px}
.home443 .hero-search{display:flex;align-items:center;gap:13px;padding:6px 6px 6px 18px;height:61px;border:1px solid var(--h-line);border-radius:8px;background:var(--h-surface)}
.home443 .hero-search:focus-within{border-color:var(--h-blue);box-shadow:0 0 0 2px color-mix(in srgb,var(--h-blue) 12%,transparent)}
.home443 .hero-search svg{width:20px;height:20px;flex:0 0 auto;color:var(--h-muted)}
.home443 .hero-search input{border:0;background:transparent;outline:none;min-width:0;flex:1;width:100%;font-size:15px;color:var(--h-text);padding:7px 0}
.home443 .hero-search input::placeholder{color:var(--h-muted);opacity:1}
.home443 .st-search-button{border:0;border-radius:6px;padding:12px 28px;color:white;background:#0865ff;align-self:stretch;font-size:14px}
.home443 .st-search-button:hover{background:#0050dc}
.home443 .search-panel{display:none;position:absolute;z-index:110;top:calc(100% + 7px);left:0;right:0;max-height:365px;overflow-y:auto;background:var(--h-surface);border:1px solid var(--h-line);border-radius:8px;box-shadow:var(--h-shadow)}
.home443 .search-panel.show{display:block}
.home443 .search-item{display:flex;justify-content:space-between;align-items:center;gap:15px;text-decoration:none;padding:13px 16px;border-bottom:1px solid var(--h-line)}
.home443 .search-item:last-child{border-bottom:0}
.home443 .search-item:hover{background:var(--h-soft)}
.home443 .search-item strong{font-size:14px;display:block;color:var(--h-title);font-weight:600}
.home443 .search-meta{display:block;font-size:12px;color:var(--h-muted);margin-top:3px}
.home443 .search-arrow{color:var(--h-blue)}
.home443 .search-empty{padding:16px;font-size:14px;color:var(--h-muted)}
.home443 .st-popular-links{display:flex;align-items:center;flex-wrap:wrap;gap:5px 12px;margin-top:19px;font-size:12px;line-height:1.5}
.home443 .st-popular-links>span{font-weight:700;color:var(--h-title)}
.home443 .st-popular-links a{color:var(--h-blue);text-decoration:none}
.home443 .st-popular-links a:hover{text-decoration:underline}
.home443 .hero-stats{display:flex;gap:9px;font-size:13px;color:var(--h-muted);margin-top:18px}
.home443 .hero-stats strong{font-weight:400}
.home443 .st-hero-art{display:grid;place-items:center;min-width:0;padding-left:4px;height:488px}
.home443 .st-hero-art img{width:100%;height:inherit;min-height:0;object-fit:contain}
/* Showcase. Exactly two large cards and three smaller cards. */
.home443 :is(.h443-showcase,.h443-directory,.h443-science){padding:25px 0 24px;border-bottom:1px solid var(--h-line)}
.home443 .hm-section-heading{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:18px}
.home443 .hm-section-heading>div{min-width:0}
.home443 h2{font-size:32px;line-height:1.2;letter-spacing:-.85px;color:var(--h-title);margin:0;font-weight:700}
.home443 .hm-section-heading p{font-size:15px;color:var(--h-muted);line-height:1.4;margin:6px 0 0}
.home443 .hm-section-heading>a{color:var(--h-blue);text-decoration:none;font-size:13px;white-space:nowrap;flex-shrink:0}
.home443 .hm-section-heading>a:hover{text-decoration:underline}
.home443 .h443-feature-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:14px}
.home443 .h443-feature{grid-column:span 2;display:grid;grid-template-columns:49% minmax(0,1fr);gap:4px;align-items:center;min-width:0;height:166px;padding:7px 13px 7px 6px;border:1px solid var(--h-line);border-radius:8px;background:var(--h-surface)}
.home443 .h443-feature[data-feature="0"],.home443 .h443-feature[data-feature="1"]{grid-column:span 3;height:206px;padding:8px 20px 8px 10px;grid-template-columns:50% minmax(0,1fr);gap:16px}
.home443 .h443-feature-picture{display:flex;align-items:center;justify-content:center;width:100%;height:100%;min-width:0;min-height:0;overflow:hidden}
.home443 .h443-art{display:block;width:100%;height:100%;overflow:hidden;max-width:100%;fill:initial;stroke:none}
.home443 .h443-feature-copy{min-width:0}
.home443 .h443-kicker{display:block;font-size:11px;letter-spacing:.06em;font-weight:700;color:var(--h-muted);margin-bottom:7px;line-height:1.3}
.home443 .h443-feature h3{margin:0 0 6px;color:var(--h-title);font-size:19px;line-height:1.15;letter-spacing:-.5px;font-weight:700}
.home443 .h443-feature[data-feature="0"] h3,.home443 .h443-feature[data-feature="1"] h3{font-size:24px;letter-spacing:-.65px}
.home443 .h443-feature h3 a{text-decoration:none}
.home443 .h443-feature h3 a:hover{text-decoration:underline;text-underline-offset:3px}
.home443 .h443-feature p{font-size:13px;line-height:1.4;color:var(--h-muted);margin:0}
.home443 .h443-feature[data-feature="0"] p,.home443 .h443-feature[data-feature="1"] p{font-size:15px}
.home443 .h443-open{display:inline-block;color:var(--h-blue);text-decoration:none;font-size:13px;margin-top:13px;line-height:1.4}
.home443 .h443-open:hover{text-decoration:underline}
.home443 .h443-feature[data-feature="0"] .h443-open,.home443 .h443-feature[data-feature="1"] .h443-open{font-size:15px}
/* Alternate categories — do not repeat the five featured categories. */
.home443 .h443-category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.home443 .h443-category{display:grid;grid-template-columns:48% minmax(0,1fr) 12px;gap:7px;align-items:center;min-width:0;height:126px;padding:5px 13px 5px 6px;border:1px solid var(--h-line);border-radius:7px;text-decoration:none;background:var(--h-surface)}
.home443 .h443-category:hover,.home443 .h443-source:hover{border-color:var(--h-blue);background:var(--h-soft)}
.home443 .h443-category-picture{min-width:0;height:100%;display:flex;align-items:center;justify-content:center;overflow:hidden}
.home443 .h443-category-copy{min-width:0}
.home443 .h443-category b{display:block;font-size:17px;line-height:1.2;color:var(--h-title);letter-spacing:-.3px;margin-bottom:6px}
.home443 .h443-category small{display:block;font-size:13px;line-height:1.35;color:var(--h-muted)}
.home443 .h443-category-arrow{font-size:27px;font-weight:300;line-height:1;color:var(--h-muted)}
.home443 .hm-all-directory{scroll-margin-top:100px}
.home443 .hm-all-directory:not([open]){margin:0}
.home443 .hm-all-directory:not([open])>summary{display:none}
.home443 .hm-all-directory[open]{margin-top:22px}
.home443 .hm-all-directory summary{cursor:pointer;font-size:14px;color:var(--h-blue);padding:10px 0}
.home443 .hm-all-category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.home443 .hm-all-category-grid article{border:1px solid var(--h-line);border-radius:7px;padding:18px;min-width:0;background:var(--h-surface)}
.home443 .hm-all-category-grid h3{margin:0;font-size:18px;color:var(--h-title)}
.home443 .hm-all-category-grid h3 small{font-size:12px;color:var(--h-muted);font-weight:400}
.home443 .hm-all-category-grid a{text-decoration:none}
.home443 .hm-all-category-grid a:hover{text-decoration:underline}
.home443 .hm-all-category-grid ul{padding-left:15px;line-height:1.45;font-size:13px;color:var(--h-muted)}
.home443 .hm-all-category-grid li{margin:7px 0}
.home443 .hm-view-all{font-size:13px;color:var(--h-blue)}
/* Referenced institutions — genuine existing logo files, not generated badges. */
.home443 .h443-science{padding-bottom:11px}
.home443 .h443-source-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.home443 .h443-source{display:grid;grid-template-columns:42% minmax(0,1fr) 10px;align-items:center;gap:14px;min-width:0;height:76px;padding:10px 15px;border:1px solid var(--h-line);border-radius:6px;text-decoration:none;background:var(--h-surface)}
.home443 .h443-source-mark{display:flex;align-items:center;justify-content:flex-start;min-width:0;height:52px}
.home443 .h443-source-mark img{width:100%;height:100%;object-fit:contain;object-position:left center}
.home443 .h443-source-description{font-size:12px;line-height:1.35;color:var(--h-muted)}
.home443 .h443-source>span:last-child{color:var(--h-muted);font-size:23px}
.home443 .h443-source-note{font-size:11px;color:var(--h-muted);margin:10px 0 0}
html.st-home-dark .home443 .h443-source-mark img[src$="nature-logo.svg"],html.st-home-dark .home443 .h443-source-mark img[src$="aaep-logo.svg"],html.st-home-dark .home443 .h443-source-mark img[src$="merck-logo.svg"]{filter:brightness(0) invert(1)}
html.st-home-dark .home443 .h443-source-mark img[src$="ncbi-logo.webp"]{mix-blend-mode:screen;filter:invert(1) hue-rotate(180deg)}
html.st-home-dark .home443 .h443-source-mark img[src$="usda-logo.svg"]{filter:brightness(1.8)}
.home443 .h443-values{padding:18px 0;border-bottom:1px solid var(--h-line)}
.home443 .h443-values>.container{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.home443 .h443-values>.container>div+div{padding-left:28px;border-left:1px solid var(--h-line)}
.home443 .h443-values b{display:block;font-size:17px;color:var(--h-title);line-height:1.25}
.home443 .h443-values small{display:block;margin-top:4px;font-size:13px;color:var(--h-muted)}
.home443 .hm-footer{padding:18px 0}
.home443 .hm-footer>.container{display:flex;align-items:center;justify-content:space-between;gap:24px}
.home443 .hm-footer .st-brand-logo{width:260px}
.home443 .hm-footer .st-slogan{font-size:9px;padding-left:55px}
.home443 .hm-footer nav{display:flex;align-items:center;flex-wrap:wrap;gap:22px;font-size:13px}
.home443 .hm-footer nav a{color:var(--h-muted);text-decoration:none}
.home443 .hm-footer nav a:hover{color:var(--h-blue);text-decoration:underline}
@media(max-width:1100px){
 .home443 .container,.home443 .header-main{width:calc(100% - 48px)}
 .home443 .header-main{gap:16px}.home443 .st-brand-logo{width:288px}.home443 .st-slogan{padding-left:62px;font-size:10px}.home443 .topnav{gap:14px}
 .home443 .hero h1{font-size:42px;letter-spacing:-1.35px}.home443 .st-hero-layout{min-height:475px;grid-template-columns:53% 47%}
 .home443 .hero p{font-size:14px}.home443 .hero-search input{font-size:13px}.home443 .st-search-button{padding-inline:22px}
 .home443 .h443-feature h3{font-size:17px}.home443 .h443-feature[data-feature="0"] h3,.home443 .h443-feature[data-feature="1"] h3{font-size:21px}
 .home443 .h443-feature{height:159px;grid-template-columns:46% minmax(0,1fr);padding-right:9px}.home443 .h443-feature[data-feature="0"],.home443 .h443-feature[data-feature="1"]{height:196px;gap:9px;padding-right:13px}
 .home443 .h443-feature p{font-size:12px}.home443 .h443-feature[data-feature="0"] p,.home443 .h443-feature[data-feature="1"] p{font-size:14px}
 .home443 .h443-category{height:122px;grid-template-columns:44% minmax(0,1fr) 10px;padding-right:10px}.home443 .h443-category b{font-size:16px}.home443 .h443-category small{font-size:12px}
 .home443 h2{font-size:29px}.home443 .h443-source{gap:10px;padding-inline:10px}
}
@media(max-width:850px){
 .home443 .st-brand-logo{width:255px}.home443 .st-slogan{padding-left:54px;font-size:9px}.home443 .header-main{gap:10px}.home443 .topnav{gap:10px}.home443 .navbtn,.home443 .sources{font-size:12px}
 .home443 .hero h1{font-size:34px;letter-spacing:-1px}.home443 .eyebrow{font-size:10px}.home443 .st-hero-layout{min-height:420px}.home443 .hero-search{gap:8px;padding-left:10px}.home443 .st-search-button{padding-inline:17px}
 .home443 .h443-feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home443 .h443-feature,.home443 .h443-feature[data-feature="0"],.home443 .h443-feature[data-feature="1"]{grid-column:span 1;grid-template-columns:45% minmax(0,1fr);height:180px;padding:8px 12px 8px 5px;gap:8px}
 .home443 .h443-feature[data-feature="4"]{grid-column:1/-1;width:calc((100% - 14px)/2);justify-self:center}
 .home443 .h443-feature h3,.home443 .h443-feature[data-feature="0"] h3,.home443 .h443-feature[data-feature="1"] h3{font-size:19px}
 .home443 .h443-feature p,.home443 .h443-feature[data-feature="0"] p,.home443 .h443-feature[data-feature="1"] p{font-size:13px}
 .home443 .h443-feature .h443-open{font-size:13px}.home443 .h443-category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home443 .h443-category{height:126px}
 .home443 .hm-section-heading{gap:16px}.home443 h2{font-size:27px}.home443 .hm-section-heading p{font-size:14px}.home443 .hm-section-heading>a{font-size:12px}
 .home443 .h443-source-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.home443 .h443-values>.container{gap:18px}.home443 .h443-values>.container>div+div{padding-left:18px}.home443 .h443-values b{font-size:15px}.home443 .h443-values small{font-size:12px}
 .home443 .hm-footer nav{gap:15px}.home443 .hm-footer .st-brand-logo{width:230px}.home443 .hm-footer .st-slogan{padding-left:49px;font-size:8px}
}
@media(max-width:640px){
 html{scroll-padding-top:128px}
 .home443 .container,.home443 .header-main{width:calc(100% - 28px)}
 .home443 .header-main{grid-template-columns:minmax(0,1fr) auto;row-gap:4px;padding:10px 0 4px;min-height:100px}.home443 .st-brand-logo{width:254px}.home443 .st-slogan{padding-left:54px;font-size:9px}.home443 .theme{grid-row:1;grid-column:2}
 .home443 .topnav{grid-column:1/-1;grid-row:2;justify-content:space-between;gap:12px}.home443 .navbtn,.home443 .sources{font-size:13px;padding:7px 0}
 .home443 .dropdown{width:100%;max-height:calc(100dvh - 125px)}.home443 .dropbody{max-height:calc(100dvh - 240px);grid-template-columns:1fr}.home443 #stCategoryMenu .dropbody{grid-template-columns:repeat(2,minmax(0,1fr))}
 .home443 .st-hero-layout{grid-template-columns:1fr;padding-block:25px 20px;min-height:0;gap:16px}.home443 .st-hero-copy{padding:0}.home443 .hero h1{font-size:clamp(29px,7.4vw,42px);line-height:1.13;letter-spacing:-1px;margin:15px 0 14px}.home443 .eyebrow{font-size:10px}
 .home443 .hero p{font-size:14px;line-height:1.5}.home443 .hero-search-wrap{margin-top:19px}.home443 .hero-search{height:55px}.home443 .hero-search input{font-size:13px}.home443 .st-search-button{font-size:13px;padding:10px 18px}.home443 .st-popular-links{font-size:11px;margin-top:14px;gap:6px 10px}.home443 .hero-stats{font-size:12px;margin-top:12px}
 .home443 .st-hero-art{padding:0;max-width:390px;width:100%;height:auto;justify-self:center}.home443 .st-hero-art img{height:auto}.home443 .search-panel{max-height:300px}
 .home443 :is(.h443-showcase,.h443-directory,.h443-science){padding-top:22px;padding-bottom:20px}
 .home443 .hm-section-heading{align-items:flex-start;gap:12px;margin-bottom:14px;flex-wrap:wrap}.home443 h2{font-size:25px;letter-spacing:-.6px}.home443 .hm-section-heading p{font-size:13px;margin-top:5px}.home443 .hm-section-heading>a{font-size:12px;white-space:normal}
 .home443 .h443-feature-grid{grid-template-columns:1fr;gap:10px}.home443 .h443-feature,.home443 .h443-feature[data-feature="0"],.home443 .h443-feature[data-feature="1"],.home443 .h443-feature[data-feature="4"]{grid-column:1;width:100%;grid-template-columns:45% minmax(0,1fr);height:166px;gap:10px;padding:7px 13px 7px 5px}
 .home443 .h443-feature h3,.home443 .h443-feature[data-feature="0"] h3,.home443 .h443-feature[data-feature="1"] h3{font-size:20px;letter-spacing:-.35px}.home443 .h443-kicker{font-size:10px;margin-bottom:6px}.home443 .h443-feature .h443-open{font-size:13px;margin-top:11px}
 .home443 .h443-category-grid{grid-template-columns:1fr;gap:10px}.home443 .h443-category{height:123px;grid-template-columns:43% minmax(0,1fr) 12px;padding:5px 14px 5px 6px;gap:12px}.home443 .h443-category b{font-size:18px}.home443 .h443-category small{font-size:13px}
 .home443 .hm-all-category-grid{grid-template-columns:1fr}.home443 .hm-all-directory{scroll-margin-top:126px}
 .home443 .h443-source-grid{grid-template-columns:1fr;gap:9px}.home443 .h443-source{height:74px;grid-template-columns:40% minmax(0,1fr) 10px;padding-inline:15px;gap:18px}.home443 .h443-source-description{font-size:13px}.home443 .h443-source-note{font-size:10px;line-height:1.5}
 .home443 .h443-values>.container{grid-template-columns:1fr;gap:14px}.home443 .h443-values>.container>div+div{border-left:0;border-top:1px solid var(--h-line);padding:14px 0 0}.home443 .h443-values b{font-size:16px}.home443 .h443-values small{font-size:12px}
 .home443 .hm-footer>.container{flex-direction:column;align-items:flex-start;gap:18px}.home443 .hm-footer nav{gap:20px;font-size:12px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.home443 .site-header{position:static}.home443 .theme,.home443 .search-panel{display:none!important}}

/* W445: preserve exactly the prior SVG contain behaviour for native lazy images. */
.home443 img.h443-art{object-fit:contain}