/* Shared reading and navigation rhythm, October 2026. */
:root{--ink:#202d40;--navy:#172d59;--muted:#596575;--paper:#f5f7f9;--line:#e0e5eb;--max:1200px}
html{scroll-padding-top:104px}
body{font-family:"Helvetica Neue",Arial,Helvetica,sans-serif;line-height:1.7}
h1,h2,h3{font-weight:500;letter-spacing:-.025em;line-height:1.2}
h1{font-size:clamp(36px,3.7vw,52px)}
h2{font-size:clamp(28px,2.8vw,38px)}
h3{font-size:23px}
.wrap{width:min(var(--max),calc(100% - 96px))}
.preview-note{background:#f7f8fa;border-color:#e8ebef;color:#687382;padding:5px 18px;font-size:10px;letter-spacing:.02em}
.site-header{height:84px;background:#fff}
.nav{height:100%;gap:28px}
.brand{width:200px;flex-shrink:0}
.brand img{height:76px;width:200px;object-fit:contain}
.navlinks{gap:30px;font-size:14px;font-weight:500}
.navlinks .button{padding:12px 19px;min-height:44px;gap:18px}
.navlinks a[aria-current]:not(.button){color:var(--navy);text-decoration:underline;text-underline-offset:8px;text-decoration-thickness:2px}
.button{font-weight:500;padding:14px 22px;min-height:48px;gap:20px;border-radius:2px}
.button.outline{border-color:#c4cdd8}
.eyebrow,.home-kicker{font-size:11px;letter-spacing:.1em;font-weight:600}
.eyebrow:before{width:20px}
.breadcrumb{padding:25px 0 22px;font-size:12px;color:#637083}
.breadcrumb a{text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.section{padding:64px 0}
.content-section{scroll-margin-top:24px}
.page-intro{padding:56px 0;background:#f5f7f9}
.page-intro h1{font-size:clamp(36px,3.7vw,48px);margin-bottom:18px;max-width:850px}
.page-intro p{font-size:17px;line-height:1.75;max-width:720px;margin-bottom:0}
.product-top{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:72px;padding:20px 0 56px}
.product-top h1{font-size:clamp(34px,3.6vw,48px);font-weight:500;line-height:1.15;margin-bottom:22px;letter-spacing:-.03em}
.product-top p{font-size:16px;line-height:1.8;max-width:600px}
.product-top .eyebrow{margin-bottom:18px}
.product-top .cas{font:13px/1.6 "Helvetica Neue",Arial,sans-serif;letter-spacing:.02em;padding-top:18px;margin-top:22px}
.technical-product-hero .product-detail-photo{width:100%;max-width:420px;margin:0 auto}
.technical-product-hero .main-image{background:#fff;min-height:0}
.technical-product-hero .main-image img{width:100%;height:auto;max-height:420px;object-fit:contain}
.product-top>.main-image{width:100%;max-width:420px;min-height:0;justify-self:center;background:#fff}
.product-top>.main-image img{max-height:420px;object-fit:contain}
.product-detail-photo figcaption{font-size:12px;line-height:1.65;padding-top:12px;color:#687382}
.hero-actions{gap:14px;margin-top:26px}
.product-subnav{background:#fff;border-block:1px solid var(--line);position:sticky;top:84px;z-index:12}
.product-subnav .wrap{gap:32px;padding-block:17px;font-size:13px;scrollbar-width:thin}
.product-subnav a{color:#4c5a6c;flex-shrink:0}
.product-subnav a:hover,.product-subnav a:focus-visible{color:var(--navy);text-decoration:underline;text-underline-offset:7px}
.technical-product{grid-template-columns:minmax(0,1fr) 235px;gap:64px}
.technical-product .content-section{margin-bottom:54px}
.technical-product h2{font-size:30px;line-height:1.3;margin-bottom:20px}
.technical-product h3{font-size:21px;line-height:1.4;margin-bottom:14px}
.technical-product .content-section>p,.technical-product .application-list p,.product-selection{font-size:16px;line-height:1.8}
.technical-product .application-list{gap:22px}
.technical-product .application-list article{padding-bottom:22px}
.technical-product .application-list p{margin-bottom:0}
.small-note,.technical-product .small-note{font-size:13px;line-height:1.75;color:#606c7c}
.spec-table table,.technical-product .technical-table table{font-size:14px;line-height:1.65}
.spec-table thead th,.wp-block-table thead th{background:#eef2f6;color:var(--navy);font-weight:600;border-bottom:1px solid #cbd5e1;border-top:2px solid #aab9cd}
.technical-table tbody th[scope=row]{font-weight:500}
.spec-table td,.spec-table th,.technical-product .technical-table td,.technical-product .technical-table th{padding:15px 18px}
.spec-table tr:nth-child(even) td,.technical-table tbody tr:nth-child(even) td,.technical-table tbody tr:nth-child(even) th{background:#f8f9fb}
.spec-table td{font-variant-numeric:tabular-nums}
.technical-product .spec-group{padding:0 20px;border-color:var(--line)}
.technical-product .spec-group>summary{font-size:17px;font-weight:500;padding:20px 0}
.aside-card,.technical-product .aside-card{background:#fff;border:1px solid var(--line);padding:24px;top:112px}
.aside-card .eyebrow{font-size:10px;letter-spacing:.07em}
.technical-product .aside-card h3{font-size:22px;margin-bottom:16px}
.aside-card p{font-size:14px;line-height:1.75}
.aside-contact{display:block;color:var(--navy);font-size:13px;overflow-wrap:anywhere;margin-top:18px;text-decoration:underline;text-underline-offset:4px}
.aside-card .text-link{font-size:13px;line-height:1.6;display:block;margin-top:20px}
.product-documents{background:#f5f7f9;padding:30px}
.product-documents h2{font-size:26px}
.product-inquiry-brief{margin:0 0 54px;padding:28px 0;border-block:1px solid var(--line)}
.product-inquiry-brief h2{margin-top:12px}.product-inquiry-brief ul{padding-left:20px;margin-bottom:22px;font-size:15px}.product-inquiry-brief li{padding-left:3px;margin-bottom:10px}
.fine-identity .fine-identity-name{display:block;font-size:17px;color:var(--muted);margin-top:4px}
.fine-identity strong{font-weight:500}.fine-product-hero .hero-actions{align-items:center}
.fine-parameters article{border-bottom:1px solid var(--line);padding:22px 0}.fine-parameters article:last-child{border:0;padding-bottom:0}.fine-parameters article p{margin-bottom:0}
.product-documents dt{font-size:16px;font-weight:500}
.product-documents dd{font-size:14px;line-height:1.75}
.technical-product #questions summary{font-weight:500;font-size:16px;padding-block:18px}
.technical-product #questions p{font-size:15px;line-height:1.8}
.catalog-search{max-width:720px;margin-bottom:24px}
.catalog-search input{min-height:52px;border-color:#c6cfda;background:#fff}
.filters{gap:10px;margin-bottom:22px}
.filter{font-weight:500;border-radius:2px;min-height:42px}
.results-count{font-size:13px;color:var(--muted);margin-bottom:24px}
.products-grid{gap:28px}
.product-card{border-color:#e2e6ec;border-radius:2px;overflow:hidden;transition:border-color .18s,box-shadow .18s}
.product-card:hover{transform:none;border-color:#a5b4c8;box-shadow:0 4px 18px #18234809}
.product-card .product-image{height:280px;background:#fff;padding:16px;border-bottom:1px solid #edf0f4}
.product-card .product-image img,.product-card .product-image img[src*=pam],.product-card .product-image img[src*=magnesium],.product-card .product-image img[src*="-branded"],.product-card .product-image img[src*="polyferric-sulfate-powder"]{object-fit:contain;background:#fff;height:100%;width:100%}
.product-card .card-copy{padding:25px}
.product-card h3{font-size:24px;font-weight:500;line-height:1.3;margin:10px 0 12px}
.product-card .card-copy p{font-size:14px;line-height:1.75}
.product-card .tag{font-size:10px;letter-spacing:.06em;color:#687382}
.product-card .card-link{font-size:13px;font-weight:500;padding-top:20px}
.product-card .symbol-image{background:#f5f7f9;height:100%;min-height:0}
.product-card .symbol-image strong{font-size:36px;font-weight:500}
.home-intro{padding:64px 0;background:#f5f7f9}
.home-intro-grid{gap:64px;grid-template-columns:1fr 1fr}
.home-intro h1{font-size:clamp(38px,4vw,54px);line-height:1.12;font-weight:500;letter-spacing:-.03em}
.home-lead{font-size:17px;line-height:1.8}
.home-products{padding:72px 0}
.home-section-heading h2,.home-company h2{font-size:34px;font-weight:500}
.home-family-title{font-size:12px;border-bottom-width:1px;border-color:#b6c1d0;letter-spacing:.07em}
.home-product-link{padding:26px 0;min-height:124px}
.home-product-link h3{font-size:25px;font-weight:500}
.home-product-link p{font-size:14px}
.home-development{background:#f7f8fa;padding:24px;gap:30px}
.home-company{padding:72px 0;background:#f5f7f9}
.home-timeline dt{font-size:30px;font-weight:500}
.home-timeline strong{font-size:15px;font-weight:500}
.home-timeline p{font-size:13px;line-height:1.75}
.home-company-proof>p{font-size:15px}
.cta,.home-page .cta,.home .cta{background:#f5f7f9;border-top:1px solid var(--line);padding:38px 0}
.cta h2,.home-page .cta h2,.home .cta h2{font-size:30px;font-weight:500;line-height:1.25;margin:0 0 8px}
.cta p{font-size:15px;line-height:1.7;color:var(--muted);margin:0}
.site-footer{background:#16263e;padding:48px 0 22px}
.site-footer p,.site-footer a{font-size:13px;line-height:1.85}
.site-footer h3{font-weight:500;font-size:15px;margin-bottom:18px}
.footer-bottom{font-size:11px}
@media(max-width:1100px){
 .wrap{width:calc(100% - 56px)}
 .navlinks{gap:20px}.brand,.brand img{width:180px}
 .product-top{gap:40px}.technical-product{gap:36px;grid-template-columns:minmax(0,1fr) 220px}
 .product-card .product-image{height:240px}.product-card .card-copy{padding:22px}
 .home-intro-grid{gap:40px}
}
@media(max-width:800px){
 html{scroll-padding-top:138px}.wrap{width:calc(100% - 40px)}
 .site-header{height:76px}.brand,.brand img{width:178px}.brand img{height:70px}
 .navlinks{top:76px;padding:24px 20px;gap:18px}
 .navlinks .button{align-self:flex-start}
 .section{padding:44px 0}.page-intro{padding:38px 0}.page-intro h1{font-size:38px}
 .product-top{grid-template-columns:1fr;gap:30px;padding:14px 0 38px}
 .product-top h1{font-size:38px}.product-top p{font-size:16px}
 .product-top:not(.calcium-top)>:last-child{order:-1}
 .technical-product-hero .product-detail-photo,.product-top>.main-image{max-width:320px}
 .technical-product-hero .main-image img{max-height:320px}
 .product-subnav{top:76px}.product-subnav .wrap{gap:26px;padding-block:15px;font-size:13px}
 .technical-product{grid-template-columns:1fr;gap:0}
 .contact-layout>:last-child{order:-1}
 .technical-product .content-section{margin-bottom:42px}.technical-product h2{font-size:28px}
 .technical-product .technical-table td,.technical-product .technical-table th{padding:13px 15px}
 .products-grid{gap:22px}.product-card .product-image{height:240px}
 .home-intro{padding:40px 0}.home-intro-grid{grid-template-columns:1fr;gap:30px}
 .home-intro h1{font-size:42px}.home-products,.home-company{padding:48px 0}
 .home-section-heading h2,.home-company h2{font-size:30px}
 .home-product-link{min-height:0}.home-product-link h3{font-size:24px}
 .home-timeline .company-name-tail{white-space:normal}
 .cta,.home-page .cta,.home .cta{padding:32px 0}.cta .wrap{gap:22px}
 .cta h2,.home-page .cta h2,.home .cta h2{font-size:28px}
}
@media(max-width:480px){
 .preview-note{font-size:9px;padding-block:4px}.breadcrumb{font-size:11px;padding:20px 0}
 .product-top h1{font-size:34px}.page-intro h1{font-size:34px}
 .hero-actions{gap:10px}.hero-actions .button{font-size:13px;gap:12px;padding:13px 16px}
 .page-intro{padding:28px 0}.page-intro p{font-size:15px;line-height:1.7}
 .products-grid{gap:16px}
 .product-card{display:grid;grid-template-columns:104px minmax(0,1fr);align-items:start}
 .product-card .product-image{height:128px;padding:10px 8px;border-bottom:0}
 .product-card .card-copy{padding:18px 16px 18px 4px;min-width:0}
 .product-card h3{font-size:20px;margin:7px 0 10px;overflow-wrap:anywhere}
 .product-card .card-copy p{font-size:13px;line-height:1.65;margin-bottom:16px}
 .product-card .card-link{font-size:12px;padding-top:12px;gap:10px}
 .product-card .tag{font-size:9px;letter-spacing:.04em}
 .product-card .symbol-image strong{font-size:20px}.product-card .symbol-image span{font-size:8px}
 .home-intro h1{font-size:38px}.home-section-heading{gap:18px}
 .home-development{padding:22px}.product-documents{padding:23px}
 .technical-product .content-section>p,.technical-product .application-list p{font-size:15px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.product-card,.button{transition:none}}

/* Product decisions and connected buying guides. */
.product-buyer-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;border-block:1px solid var(--line);padding:18px 0;margin:20px 0 0}
.product-buyer-facts dt{font-size:11px;color:var(--muted);line-height:1.5;margin-bottom:5px}
.product-buyer-facts dd{font-size:14px;line-height:1.55;margin:0;font-weight:500}
.product-top .supplier-note{font-size:12px;color:var(--muted);line-height:1.65;margin:20px 0 0}
.supplier-note a{white-space:nowrap;text-decoration:underline;text-underline-offset:3px}
.guide-links,.guide-hub-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.guide-hub-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.guide-card{display:flex;flex-direction:column;padding:26px;border:1px solid var(--line);border-top:2px solid #b3bfd0;background:#fff;color:var(--ink);text-decoration:none;transition:border-color .15s}
.guide-card:hover,.guide-card:focus-visible{border-color:#8c9db6;background:#f9fafc}
.guide-card .tag{color:var(--muted);font-size:10px;letter-spacing:.07em;text-transform:uppercase}
.guide-card h3,.technical-product .guide-card h3{font-size:23px;line-height:1.3;margin:13px 0 16px}
.guide-card p{font-size:14px;line-height:1.75;color:var(--muted);margin:0 0 24px}
.guide-card-link{margin-top:auto;font-size:13px;color:var(--navy);display:flex;justify-content:space-between;gap:14px}
.guide-hub-note{margin-top:36px;font-size:14px;color:var(--muted)}
.guide-hub-note a{text-decoration:underline;text-underline-offset:3px}
.guide-intro{padding-block:26px 44px;border-bottom:1px solid var(--line)}
.guide-intro h1{max-width:940px;margin:18px 0 24px;font-size:clamp(36px,4vw,52px);line-height:1.14}
.guide-lead{max-width:780px;font-size:18px;line-height:1.8;color:var(--muted);margin-bottom:20px}
.guide-byline{font-size:12px;color:var(--muted);margin:0}
.guide-layout{display:grid;grid-template-columns:225px minmax(0,1fr);gap:65px;align-items:start;padding-block:48px 76px}
.guide-toc{position:sticky;top:112px;border-left:2px solid #dbe2eb;padding-left:20px}
.guide-toc p{font-size:11px;text-transform:uppercase;letter-spacing:.08em;font-weight:600;margin:0 0 18px;color:var(--muted)}
.guide-toc a{display:block;color:var(--muted);font-size:13px;line-height:1.65;margin-bottom:15px;text-decoration:none}
.guide-toc a:hover,.guide-toc a:focus-visible{color:var(--navy);text-decoration:underline;text-underline-offset:3px}
.guide-content{min-width:0;max-width:820px;font-size:16px;line-height:1.85}
.guide-content h2{font-size:30px;line-height:1.3;margin:0 0 22px;scroll-margin-top:24px}
.guide-section{padding-bottom:38px;margin-bottom:38px;border-bottom:1px solid var(--line)}
.guide-section:last-of-type{margin-bottom:0}
.guide-content p{margin:0 0 22px}
.guide-content ul{padding-left:22px;margin:0 0 22px}
.guide-content li{padding-left:4px;margin-bottom:14px}
.guide-content p a:not(.button),.guide-content li a{text-decoration:underline;text-underline-offset:3px;color:#244b7a}
.guide-table{margin:26px 0 10px}.guide-table table{min-width:570px}
.guide-content .table-scroll-hint{font-size:12px;color:var(--muted)}
.guide-photo{margin:28px 0 0;max-width:660px}
.guide-photo img{display:block;width:100%;height:auto;max-height:470px;object-fit:contain;background:#f5f7f9}
.guide-photo figcaption{font-size:12px;color:var(--muted);line-height:1.7;padding-top:12px}
.guide-next{background:var(--paper);padding:30px;margin-top:38px}.guide-next h2{font-size:27px}.guide-next p:last-child{margin:24px 0 0}
.guide-content.entry-content>h2:not(:first-child){padding-top:34px;margin-top:34px;border-top:1px solid var(--line)}
.guide-content.entry-content .wp-block-image img{max-height:470px;object-fit:contain}
.guide-content.entry-content .wp-block-table{overflow-x:auto}.guide-content.entry-content table{min-width:570px}
@media(max-width:1100px){.guide-layout{grid-template-columns:190px minmax(0,1fr);gap:40px}.guide-hub-grid{gap:18px}.guide-card{padding:22px}}
@media(max-width:800px){
 .guide-intro{padding-block:12px 30px}.guide-intro h1{font-size:38px;line-height:1.17}.guide-lead{font-size:16px}
 .guide-layout{grid-template-columns:1fr;gap:32px;padding-block:30px 48px}.guide-toc{position:static;padding:20px 22px;border:1px solid var(--line);background:#f8fafc}.guide-toc a:last-child{margin-bottom:0}
 .guide-content h2{font-size:27px}.guide-content{font-size:15px}.guide-section{padding-bottom:28px;margin-bottom:28px}
 .guide-hub-grid{grid-template-columns:1fr}.guide-next{padding:24px}.guide-photo img{max-height:380px}
}
@media(max-width:480px){
 .fine-product-hero h1{font-size:clamp(24px,7vw,32px)}
 .product-buyer-facts{gap:12px}.product-buyer-facts dd{font-size:12px}.product-buyer-facts dt{font-size:10px}
 .guide-links{grid-template-columns:1fr;gap:16px}.guide-card h3,.technical-product .guide-card h3{font-size:22px}
 .guide-intro h1{font-size:34px}.guide-content .button{padding-inline:16px;font-size:13px}.guide-next h2{font-size:25px}
}
.field-visit{background:#f5f7f9}
.field-visit-heading{display:grid;grid-template-columns:1fr 1fr;gap:70px;margin:20px 0 30px;align-items:start}
.field-visit-heading h2{font-size:36px;line-height:1.25;margin:0}.field-visit-heading p{font-size:16px;line-height:1.8;margin:0 0 12px;color:var(--muted)}.field-visit-heading .small-note{font-size:12px}
.field-visit-photos{display:grid;grid-template-columns:2fr 1fr;gap:22px}.field-visit-photos figure{margin:0;min-width:0}
.field-visit-photos a{display:block;overflow:hidden}.field-visit-photos img{width:100%;height:390px;object-fit:cover;display:block}
.field-visit-photos .field-visit-meeting img{object-position:center 55%}.field-visit-photos .field-visit-equipment img{object-position:center 55%}
.field-visit-photos figcaption{font-size:12px;line-height:1.7;color:var(--muted);padding-top:12px}
.field-visit-next{display:flex;justify-content:space-between;align-items:start;gap:40px;border-top:1px solid #dbe2eb;padding-top:24px;margin-top:24px}
.field-visit-next p{max-width:580px;font-size:14px;margin:0;color:var(--muted)}.field-visit-next a{font-size:14px;max-width:320px}
.field-visit-reference{padding:26px;border-left:3px solid #b3bfd0;background:#f5f7f9}.field-visit-reference a{font-size:14px;text-decoration:underline;text-underline-offset:3px}
@media(max-width:800px){.field-visit-heading{grid-template-columns:1fr;gap:18px}.field-visit-heading h2{font-size:30px}.field-visit-heading p{font-size:15px}.field-visit-photos{grid-template-columns:1fr;gap:22px}.field-visit-photos img{height:auto;max-height:400px}.field-visit-next{flex-direction:column;gap:18px}.field-visit-reference{padding:22px}}

/* Desktop review: readable headings and one clear, persistent sales entry. */
@media(min-width:801px){
 main h1{text-wrap:balance}
 .site-header .navlinks .button{background:#172d4d;border-color:#172d4d;color:#fff}
 .site-header .navlinks .button:hover,.site-header .navlinks .button:focus-visible{background:#294768;border-color:#294768;color:#fff!important}
}