/* Engineering Resources — Phase 1 storefront
   Lightweight, dependency-free design system. Brand name remains configurable. */
:root {
  --navy-950:#10283F; --navy-900:#152536; --navy-800:#203B55;
  --blue-700:#1558B0; --blue-600:#1D6FE8; --blue-100:#DCEBFF; --blue-050:#EAF3FF;
  --teal-600:#087F8C; --orange-500:#F28C28; --green-700:#16794C; --red-700:#B42318;
  --ink:#152536; --muted:#586A7C; --muted-on-dark:#B7C8D8;
  --surface:#FFFFFF; --canvas:#F5F8FB; --surface-soft:#F0F4F8;
  --border:#D8E1EA; --border-strong:#7D8FA0;
  --font-sans:Inter,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,monospace;
  --container:1200px; --gutter:24px; --header-h:76px;
  --radius-sm:8px; --radius-md:12px; --radius-lg:18px; --radius-xl:24px; --pill:999px;
  --shadow-sm:0 1px 2px rgba(16,40,63,.05),0 5px 16px rgba(16,40,63,.04);
  --shadow-md:0 12px 32px rgba(16,40,63,.10);
  --shadow-hero:0 28px 70px rgba(2,14,27,.28);
  --focus:0 0 0 3px rgba(29,111,232,.24);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px;color-scheme:light}
body{margin:0;background:var(--canvas);color:var(--ink);font-family:var(--font-sans);font-size:16px;line-height:1.65;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:var(--blue-700);text-decoration:none}
a:hover{color:var(--blue-600)}
button,input,select,textarea{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
:focus-visible{outline:3px solid var(--blue-600);outline-offset:3px;box-shadow:var(--focus)}
::selection{background:#D5E8FF;color:var(--navy-950)}
.container{width:min(calc(100% - 2*var(--gutter)),var(--container));margin-inline:auto}
.reading{max-width:760px}
.skip-link{position:absolute;left:16px;top:-60px;z-index:1000;padding:10px 14px;background:#fff;border-radius:8px;color:var(--navy-950);box-shadow:var(--shadow-md)}
.skip-link:focus{top:12px}
/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(216,225,234,.9)}
.header-inner{min-height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:inline-flex;align-items:center;gap:11px;min-width:0;color:var(--navy-950)}
.brand img{width:39px;height:39px;flex:none}
.brand-copy{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:16px;font-weight:750;letter-spacing:-.035em;color:var(--navy-950)}
.brand-descriptor{font-size:10px;font-weight:650;letter-spacing:.095em;text-transform:uppercase;color:var(--muted);margin-top:5px;white-space:nowrap}
.primary-nav{display:flex;align-items:center;gap:29px;margin-left:auto}
.primary-nav a{font-size:14px;font-weight:600;color:#425467;transition:color var(--ease)}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{color:var(--blue-700)}
.primary-nav a[aria-current="page"]{position:relative}
.primary-nav a[aria-current="page"]::after{content:"";position:absolute;height:2px;left:0;right:0;bottom:-10px;background:var(--blue-600);border-radius:2px}
.header-actions{display:flex;align-items:center;gap:10px}
.mobile-menu-button{display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--navy-900);align-items:center;justify-content:center;cursor:pointer}
.mobile-menu-button svg{width:20px;height:20px}
/* Buttons and shared components */
.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:11px 17px;border:1px solid transparent;border-radius:9px;font-size:14px;font-weight:700;line-height:1.2;text-align:center;cursor:pointer;transition:background var(--ease),border-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease)}
.button:hover{transform:translateY(-1px)}
.button:active{transform:translateY(0)}
.button--primary{background:var(--blue-600);color:#fff;box-shadow:0 5px 14px rgba(29,111,232,.17)}
.button--primary:hover{background:var(--blue-700);color:#fff;box-shadow:0 8px 20px rgba(29,111,232,.22)}
.button--secondary{background:#fff;color:var(--navy-900);border-color:var(--border-strong)}
.button--secondary:hover{background:var(--blue-050);border-color:#83AEE9;color:var(--navy-950)}
.button--dark{background:var(--navy-950);color:#fff}
.button--dark:hover{background:var(--navy-800);color:#fff}
.button--ghost-light{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.35);color:#fff}
.button--ghost-light:hover{background:rgba(255,255,255,.16);color:#fff}
.button--small{min-height:39px;padding:9px 13px;font-size:13px}
.button[disabled],.button[aria-disabled="true"]{opacity:.56;cursor:not-allowed;transform:none;box-shadow:none}
.text-link{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:700;color:var(--blue-700)}
.text-link:hover{gap:11px}
.icon{width:20px;height:20px;flex:none}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-700);font-size:12px;font-weight:800;letter-spacing:.11em;text-transform:uppercase}
.eyebrow::before{content:"";width:20px;height:2px;background:currentColor;border-radius:2px}
.section{padding:82px 0}
.section--compact{padding:58px 0}
.section--white{background:#fff}
.section--dark{background:var(--navy-950);color:#fff}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:30px}
.section-heading h2{max-width:680px;margin:10px 0 0;font-size:clamp(27px,3vw,36px);line-height:1.15;letter-spacing:-.04em;color:var(--navy-950)}
.section-heading p{max-width:520px;margin:9px 0 0;color:var(--muted)}
.section--dark .section-heading h2{color:#fff}
.section--dark .section-heading p{color:var(--muted-on-dark)}
.kicker{font-size:13px;font-weight:700;color:var(--blue-700)}
.muted{color:var(--muted)}
/* Hero */
.hero{position:relative;isolation:isolate;overflow:hidden;background:var(--navy-950);color:#fff}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;background-image:linear-gradient(90deg,rgba(10,28,46,.99) 0%,rgba(10,28,46,.96) 37%,rgba(10,28,46,.47) 68%,rgba(10,28,46,.15) 100%),url('../images/hero-engineering-concept.webp');background-size:cover;background-position:center right}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,transparent 65%,rgba(8,23,38,.46));pointer-events:none}
.hero-inner{min-height:570px;display:flex;align-items:center;padding-block:76px 86px}
.hero-copy{width:min(610px,57%)}
.hero .eyebrow{color:#8DBEFF}
.hero h1{margin:18px 0 19px;font-size:clamp(39px,5vw,58px);line-height:1.06;letter-spacing:-.052em;font-weight:760;color:#fff}
.hero h1 span{color:#8DBEFF}
.hero-lead{max-width:560px;margin:0;color:#D5E1EC;font-size:18px;line-height:1.65}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-note{display:flex;align-items:center;gap:10px;margin-top:28px;color:#C6D5E3;font-size:13px}
.hero-note svg{width:17px;height:17px;color:#8DBEFF}
.hero-image-label{position:absolute;right:max(24px,calc((100vw - var(--container))/2));bottom:24px;padding:8px 12px;background:rgba(6,20,33,.72);border:1px solid rgba(255,255,255,.16);border-radius:7px;color:#C8D8E7;font-size:11px;backdrop-filter:blur(7px)}
/* Reassurance strip */
.principles-strip{position:relative;margin-top:-1px;background:#fff;border-bottom:1px solid var(--border)}
.principles-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.principle{display:flex;align-items:center;gap:13px;padding:22px 18px;border-right:1px solid var(--border)}
.principle:first-child{padding-left:0}.principle:last-child{border:0}
.principle-icon{width:38px;height:38px;display:grid;place-items:center;border-radius:10px;background:var(--blue-050);color:var(--blue-700);flex:none}
.principle-icon svg{width:19px;height:19px}
.principle strong{display:block;font-size:13px;color:var(--navy-900)}
.principle span{display:block;margin-top:2px;font-size:12px;color:var(--muted);line-height:1.4}
/* Category cards */
.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.category-card{position:relative;min-height:206px;padding:22px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-sm);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);color:var(--ink)}
.category-card:hover{transform:translateY(-3px);border-color:#A9C6EA;box-shadow:var(--shadow-md);color:var(--ink)}
.category-icon{width:46px;height:46px;display:grid;place-items:center;margin-bottom:20px;border:1px solid #D8E8FB;background:linear-gradient(145deg,#F2F8FF,#E6F1FF);border-radius:12px;color:var(--blue-700)}
.category-icon svg{width:23px;height:23px}
.category-card h3{margin:0 0 6px;font-size:17px;letter-spacing:-.02em;color:var(--navy-950)}
.category-card p{max-width:230px;margin:0;font-size:13px;line-height:1.55;color:var(--muted)}
.category-arrow{position:absolute;right:19px;bottom:20px;color:var(--blue-700);font-size:18px}
/* Split editorial / evidence */
.editorial-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:70px;align-items:center}
.editorial-copy h2{margin:10px 0 16px;font-size:clamp(28px,3.2vw,40px);line-height:1.14;letter-spacing:-.04em;color:var(--navy-950)}
.editorial-copy>p{max-width:600px;color:var(--muted);margin:0 0 20px}
.check-list{display:grid;gap:13px;margin:23px 0 0;padding:0;list-style:none}
.check-list li{display:flex;gap:12px;align-items:flex-start;color:#33485C;font-size:14px}
.check{width:21px;height:21px;display:grid;place-items:center;flex:none;border-radius:50%;background:#E4F2EC;color:var(--green-700);font-size:12px;font-weight:800;margin-top:1px}
.spec-panel{padding:27px;background:linear-gradient(150deg,#10283F,#193B59);border-radius:18px;color:#fff;box-shadow:var(--shadow-hero)}
.spec-panel h3{margin:0 0 6px;font-size:19px}
.spec-panel>p{margin:0 0 19px;color:#B9CAD9;font-size:13px}
.spec-row{display:grid;grid-template-columns:115px 1fr;gap:15px;padding:14px 0;border-top:1px solid rgba(255,255,255,.13)}
.spec-row strong{font-size:12px;color:#91BCF1;letter-spacing:.02em}
.spec-row span{font-size:13px;color:#E3ECF4;line-height:1.48}
/* Catalogue / empty state */
.catalogue-toolbar{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.search-field{position:relative;flex:1;max-width:460px}
.search-field svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:#6B7E90}
.search-field input{width:100%;min-height:46px;padding:10px 14px 10px 43px;border:1px solid var(--border-strong);border-radius:9px;background:#fff;color:var(--ink)}
.select-field{min-height:46px;padding:10px 38px 10px 13px;border:1px solid var(--border-strong);border-radius:9px;background:#fff;color:var(--ink)}
.empty-state{display:grid;grid-template-columns:100px 1fr;align-items:center;gap:27px;padding:39px;border:1px dashed #B8C8D8;border-radius:18px;background:linear-gradient(135deg,#fff,#F4F8FC)}
.empty-illustration{width:92px;height:92px;display:grid;place-items:center;border-radius:22px;background:#EAF3FF;color:var(--blue-700)}
.empty-illustration svg{width:43px;height:43px}
.empty-state h3{margin:0 0 7px;font-size:22px;letter-spacing:-.03em;color:var(--navy-950)}
.empty-state p{max-width:620px;margin:0;color:var(--muted);font-size:14px}
.empty-state .button{margin-top:17px}
/* Product cards */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.product-card{display:flex;flex-direction:column;overflow:hidden;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-sm);transition:transform var(--ease),box-shadow var(--ease)}
.product-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.product-card-media{aspect-ratio:16/10;display:grid;place-items:center;background:var(--surface-soft);overflow:hidden}
.product-card-media img{width:100%;height:100%;object-fit:cover}
.product-card-body{display:flex;flex:1;flex-direction:column;padding:19px}
.product-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.tag{display:inline-flex;align-items:center;padding:4px 8px;border-radius:5px;background:var(--blue-050);color:var(--blue-700);font-size:10px;font-weight:800;letter-spacing:.045em;text-transform:uppercase}
.product-card h3{margin:0 0 7px;font-size:17px;line-height:1.32;letter-spacing:-.02em}
.product-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.55}
.product-card-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:18px}
.product-price{font-weight:800;color:var(--navy-950)}
/* CTA band */
.cta-band{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:26px;padding:38px 42px;background:var(--navy-950);border-radius:18px;color:#fff}
.cta-band::after{content:"";position:absolute;width:340px;height:340px;right:10%;top:-220px;border:1px solid rgba(123,178,238,.22);border-radius:50%;box-shadow:0 0 0 28px rgba(123,178,238,.045),0 0 0 58px rgba(123,178,238,.03)}
.cta-band-content{position:relative;z-index:1;max-width:650px}
.cta-band h2{margin:0 0 8px;font-size:clamp(24px,3vw,32px);line-height:1.18;letter-spacing:-.035em}
.cta-band p{margin:0;color:#B9CAD9;font-size:14px}
.cta-band-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:10px}
/* Page hero / breadcrumbs */
.page-hero{padding:65px 0 59px;background:linear-gradient(125deg,#10283F,#1C4264);color:#fff}
.page-hero .eyebrow{color:#9BC5F4}
.page-hero h1{max-width:820px;margin:13px 0 12px;font-size:clamp(34px,4.2vw,48px);line-height:1.1;letter-spacing:-.045em;color:#fff}
.page-hero p{max-width:720px;margin:0;color:#D0DDE9;font-size:17px}
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px;color:#C0D1E0;font-size:12px}
.breadcrumbs a{color:#D9E8F7}.breadcrumbs span{opacity:.65}
/* Content pages */
.content-layout{display:grid;grid-template-columns:minmax(0,760px) minmax(220px,1fr);gap:62px;align-items:start}
.prose{color:#354A5E}
.prose h2{margin:34px 0 10px;color:var(--navy-950);font-size:25px;line-height:1.25;letter-spacing:-.03em}
.prose h3{margin:24px 0 8px;color:var(--navy-950);font-size:18px}
.prose p{margin:0 0 15px}
.prose ul,.prose ol{padding-left:22px;margin:10px 0 20px}
.prose li{margin:7px 0}
.prose a{text-decoration:underline;text-underline-offset:3px}
.prose blockquote{margin:22px 0;padding:17px 20px;border-left:3px solid var(--blue-600);background:var(--blue-050);color:var(--navy-900)}
.note-box{padding:18px 20px;border:1px solid #C9DDF4;border-radius:12px;background:#F0F7FF;color:#254767;font-size:14px}
.side-card{position:sticky;top:105px;padding:22px;background:#fff;border:1px solid var(--border);border-radius:13px;box-shadow:var(--shadow-sm)}
.side-card h2{margin:0 0 10px;font-size:15px;color:var(--navy-950)}
.side-card p{margin:0;color:var(--muted);font-size:13px}
/* Forms */
.form-card{padding:28px;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-sm)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}
.form-field{display:flex;flex-direction:column;gap:7px}
.form-field--full{grid-column:1/-1}
.form-field label{font-size:13px;font-weight:700;color:var(--navy-900)}
.form-field input,.form-field select,.form-field textarea{width:100%;min-height:46px;padding:11px 13px;border:1px solid var(--border-strong);border-radius:8px;background:#fff;color:var(--ink)}
.form-field textarea{min-height:145px;resize:vertical}
.form-field input::placeholder,.form-field textarea::placeholder{color:#627589}
.form-hint{font-size:12px;color:var(--muted)}
.form-consent{display:flex;align-items:flex-start;gap:10px;color:var(--muted);font-size:12px}
.form-consent input{margin-top:4px;accent-color:var(--blue-600)}
.form-status{display:none;margin-top:15px;padding:12px 14px;border-radius:8px;font-size:13px}
.form-status.is-visible{display:block}
.form-status--info{background:#EAF3FF;color:#174A80}
.form-status--success{background:#E8F5EE;color:#165C39}
.form-status--error{background:#FFF0EF;color:#9E241C}
.form-config-note{margin:0 0 18px;padding:13px 15px;border:1px solid #E7D6B2;border-radius:9px;background:#FFF9ED;color:#76551C;font-size:13px}
/* FAQ */
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
details.faq-item{padding:18px 19px;border:1px solid var(--border);border-radius:11px;background:#fff}
details.faq-item summary{position:relative;padding-right:28px;cursor:pointer;list-style:none;color:var(--navy-950);font-size:14px;font-weight:700}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:"+";position:absolute;right:0;top:-3px;color:var(--blue-700);font-size:22px;font-weight:500}
details.faq-item[open] summary::after{content:"−"}
details.faq-item p{margin:12px 0 0;color:var(--muted);font-size:13px}
/* Footer */
.site-footer{background:#0E2438;color:#fff}
.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:50px;padding:56px 0 43px}
.footer-brand .brand-name{color:#fff}.footer-brand .brand-descriptor{color:#AFC0D1}
.footer-brand p{max-width:330px;margin:18px 0 0;color:#B2C3D1;font-size:13px}
.footer-column h2{margin:0 0 14px;color:#fff;font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.footer-column ul{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.footer-column a{color:#B9C9D7;font-size:13px}.footer-column a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.13);color:#AFC0D1;font-size:12px}
.footer-bottom p{margin:0}
/* Consent banner */
.consent-banner{position:fixed;z-index:100;left:20px;right:20px;bottom:20px;display:none;max-width:700px;margin-left:auto;padding:17px 18px;background:#fff;border:1px solid var(--border);border-radius:13px;box-shadow:0 18px 55px rgba(7,25,42,.22)}
.consent-banner.is-visible{display:flex;align-items:center;gap:18px}
.consent-banner p{margin:0;color:#43596D;font-size:12px}
.consent-actions{display:flex;flex:none;gap:8px}
/* Product detail generated pages */
.product-detail-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:42px;align-items:start}
.product-gallery-main{overflow:hidden;border:1px solid var(--border);border-radius:14px;background:#fff}
.product-gallery-main img{width:100%;aspect-ratio:16/10;object-fit:contain;background:#F2F5F8}
.product-gallery-caption{padding:12px 15px;color:var(--muted);font-size:12px}
.purchase-panel{position:sticky;top:105px;padding:24px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-md)}
.purchase-panel h2{margin:0 0 8px;font-size:16px;color:var(--navy-950)}
.purchase-price{margin:7px 0 13px;font-size:29px;font-weight:800;letter-spacing:-.04em;color:var(--navy-950)}
.purchase-panel .button{width:100%;margin-top:8px}
.purchase-panel .small-note{margin:12px 0 0;color:var(--muted);font-size:11px;line-height:1.5}
.product-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:24px 0}
.product-fact{padding:13px;border:1px solid var(--border);border-radius:9px;background:#fff}
.product-fact span{display:block;color:var(--muted);font-size:11px}
.product-fact strong{display:block;margin-top:3px;color:var(--navy-900);font-size:13px}
.product-section{padding:27px 0;border-top:1px solid var(--border)}
.product-section h2{margin:0 0 13px;font-size:22px;color:var(--navy-950)}
.detail-list{display:grid;gap:9px;margin:0;padding:0;list-style:none}
.detail-list li{display:flex;gap:10px;color:#40566B;font-size:14px}
.detail-list li::before{content:"•";color:var(--blue-600);font-weight:900}
/* Utility */
.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.mt-0{margin-top:0!important}.mb-0{margin-bottom:0!important}
/* Responsive */
@media(max-width:1050px){
  .primary-nav{gap:19px}.header-inner{gap:18px}
  .hero-inner{min-height:530px}.hero-copy{width:62%}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .editorial-grid{gap:38px}
  .footer-main{gap:30px}
}
@media(max-width:820px){
  :root{--gutter:20px;--header-h:68px}
  .mobile-menu-button{display:flex}
  .header-actions .button{display:none}
  .primary-nav{position:absolute;top:calc(100% + 1px);left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;padding:10px 20px 16px;background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow-md)}
  .primary-nav.is-open{display:flex}
  .primary-nav a{padding:13px 6px;border-bottom:1px solid #EEF2F6}
  .primary-nav a:last-child{border:0}
  .primary-nav a[aria-current="page"]::after{display:none}
  .hero-inner{min-height:520px;padding-block:70px}.hero-copy{width:min(620px,76%)}
  .hero::before{background-image:linear-gradient(90deg,rgba(10,28,46,.99) 0%,rgba(10,28,46,.91) 52%,rgba(10,28,46,.56) 100%),url('../images/hero-engineering-concept.webp');background-position:58% center}
  .principles-grid{grid-template-columns:repeat(2,1fr)}
  .principle:nth-child(2){border-right:0}.principle:nth-child(3){padding-left:0;border-top:1px solid var(--border)}.principle:nth-child(4){border-top:1px solid var(--border)}
  .editorial-grid{grid-template-columns:1fr;gap:32px}
  .content-layout{grid-template-columns:1fr;gap:25px}.side-card{position:static}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .product-detail-grid{grid-template-columns:1fr;gap:25px}.purchase-panel{position:static}
  .footer-main{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
  :root{--gutter:17px;--header-h:64px}
  .brand img{width:35px;height:35px}.brand-name{font-size:14px}.brand-descriptor{font-size:9px;letter-spacing:.05em}
  .hero-inner{min-height:570px;align-items:flex-start;padding-top:67px;padding-bottom:72px}
  .hero-copy{width:100%}.hero::before{background-image:linear-gradient(90deg,rgba(10,28,46,.98),rgba(10,28,46,.82)),url('../images/hero-engineering-concept.webp');background-position:62% center}
  .hero h1{font-size:39px;max-width:470px}.hero-lead{font-size:16px;max-width:440px}
  .hero-actions{display:grid;grid-template-columns:1fr;max-width:310px}.hero-actions .button{width:100%}.hero-image-label{right:17px;bottom:13px;font-size:10px}
  .principles-grid{grid-template-columns:1fr 1fr}.principle{padding:16px 9px;gap:9px}.principle:first-child{padding-left:0}.principle-icon{width:32px;height:32px}.principle strong{font-size:12px}.principle span{font-size:11px}
  .section{padding:62px 0}.section--compact{padding:45px 0}.section-heading{display:block;margin-bottom:23px}.section-heading .text-link{margin-top:13px}
  .category-grid{grid-template-columns:1fr 1fr;gap:10px}.category-card{min-height:185px;padding:16px}.category-icon{width:40px;height:40px;margin-bottom:15px}.category-card h3{font-size:14px}.category-card p{font-size:12px}.category-arrow{right:14px;bottom:13px}
  .spec-panel{padding:20px}.spec-row{grid-template-columns:95px 1fr;gap:10px}
  .empty-state{grid-template-columns:1fr;padding:24px;gap:16px}.empty-illustration{width:66px;height:66px;border-radius:16px}.empty-illustration svg{width:32px;height:32px}.empty-state h3{font-size:19px}
  .cta-band{display:block;padding:27px 22px}.cta-band-actions{margin-top:19px}.cta-band-actions .button{flex:1}
  .page-hero{padding:48px 0 43px}.page-hero h1{font-size:35px}.page-hero p{font-size:15px}
  .form-card{padding:20px}.form-grid{grid-template-columns:1fr}.form-field--full{grid-column:auto}
  .faq-list{grid-template-columns:1fr}
  .product-grid{grid-template-columns:1fr}.catalogue-toolbar{align-items:stretch;flex-direction:column}.search-field{max-width:none}
  .footer-main{grid-template-columns:1fr 1fr;gap:25px 20px;padding:42px 0 30px}.footer-brand{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom p+p{margin-top:6px}
  .consent-banner.is-visible{display:block;left:12px;right:12px;bottom:12px}.consent-actions{margin-top:12px}
  .product-facts{grid-template-columns:1fr 1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}