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a{color:#d7d4df}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid #3b374b;padding-top:18px;margin-top:36px;font-size:.88rem;color:#aaa6b4}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid rgba(240,90,126,.35);outline-offset:3px}@media(max-width:900px){.site-nav{position:absolute;left:20px;right:20px;top:70px;display:none;flex-direction:column;align-items:stretch;background:var(--white);padding:12px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.site-nav.is-open{display:flex}.menu-toggle{display:block}.hero,.topic-hero,.app-hero,.split,.app-callout,.page-layout,.video-layout,.safety-stack article{grid-template-columns:1fr}.hero,.topic-hero,.app-hero{padding-block:44px}.link-grid,.knowledge-grid,.steps{grid-template-columns:1fr 1fr}.rail-card{position:static}.app-callout img{max-width:420px}.safety-stack article{gap:10px}}@media(max-width:640px){.shell{width:min(100% - 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