.category-nav{position:relative}.category-nav summary{list-style:none;cursor:pointer;font-size:13px}.category-nav summary::-webkit-details-marker{display:none}.category-nav summary:after{content:'+';padding-left:8px}.category-nav[open] summary:after{content:'−'}.category-nav-panel{position:absolute;z-index:30;top:28px;left:-18px;display:grid;gap:12px;min-width:180px;padding:18px;background:var(--paper);border:1px solid var(--line);box-shadow:0 18px 45px #16352d1f}.category-nav-panel a{font-size:12px;white-space:nowrap}.layout-switcher{display:flex;border:1px solid var(--line)}.layout-switcher button{padding:6px 7px;border:0;background:transparent;color:var(--ink);font-size:9px;letter-spacing:.08em;text-transform:uppercase;cursor:pointer}.layout-switcher button[aria-pressed="true"]{background:var(--ink);color:#fff}.preview-mobile{max-width:430px;margin:0 auto;border-left:1px solid var(--line);border-right:1px solid var(--line)}.preview-mobile .site-header{height:70px;padding:0 20px}.preview-mobile .wordmark{font-size:23px}.preview-mobile .nav{display:none;position:absolute;top:70px;left:0;right:0;background:var(--paper);padding:24px 20px;flex-direction:column;gap:24px;border-bottom:1px solid var(--line)}.preview-mobile .nav.open{display:flex}.preview-mobile .menu-button{display:block}.preview-mobile .header-actions .localization{display:none}.preview-mobile .category-nav-panel{position:static;margin-top:10px;box-shadow:none}.preview-mobile .hero,.preview-mobile .standards,.preview-mobile .faq,.preview-mobile .section-heading,.preview-mobile .product{grid-template-columns:1fr}.preview-mobile .hero-copy{padding:66px 22px}.preview-mobile .hero-art{min-height:410px}.preview-mobile .category-grid,.preview-mobile .product-grid{grid-template-columns:1fr}.preview-mobile .section,.preview-mobile .standards,.preview-mobile .faq,.preview-mobile .prose-page{padding-left:20px;padding-right:20px}.preview-mobile .site-footer{grid-template-columns:1fr;padding:62px 22px 30px;gap:34px}.preview-mobile .site-footer .localization{display:block}.preview-mobile .layout-switcher{display:none}@media(max-width:900px){.category-nav-panel{position:static;margin-top:10px;box-shadow:none}.layout-switcher{display:none}}@media(max-width:560px){.category-nav summary{font-size:13px}}