.sia-brand strong{font-family:Arial,sans-serif;font-size:2.65rem;letter-spacing:-.065em}.sia-brand span{font-size:.64rem;line-height:1.6;letter-spacing:.1em}.sia-page .header-inner{gap:20px}.sia-page nav{gap:23px}.sia-page nav [aria-current]{border-bottom:2px solid var(--accent)}.sia-hero{padding:76px 0 0;position:relative}.sia-hero h1{font-family:Arial,sans-serif;font-size:clamp(2.8rem,6vw,5rem);font-weight:500;line-height:1.08!important;max-width:950px;letter-spacing:-.045em!important}.sia-lead{max-width:760px;margin:32px 0 50px;font-size:1.125rem;line-height:1.85}.sia-lead .text-link{display:inline-flex;margin:23px 28px 0 0;font-size:1rem}.sia-lead .text-link:first-of-type{padding:12px 23px;background:var(--ink);color:white;text-decoration:none}.engineering-rule{display:flex;height:32px;border-block:1px solid var(--line);justify-content:space-between}.engineering-rule span{width:1px;background:var(--line)}.engineering-rule span:first-child{width:24%;background:var(--ink);border-right:6px solid var(--accent)}.sia-content{padding-bottom:70px}.sia-section{display:grid;grid-template-columns:100px minmax(0,790px);gap:36px;padding:56px 0;border-bottom:1px solid var(--line)}.section-index{color:var(--accent);font-size:.875rem;padding-top:9px}.sia-section h2{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:20px}.sia-section h3{margin:30px 0 10px}.sia-section p{max-width:48em}.sia-section .text-link{margin-top:20px;display:inline-flex;font-size:1rem}.sia-section .contribution{border-top:1px solid var(--line);padding-top:25px}.sia-section form{margin-top:26px}.sia-section form label{display:block;margin:25px 0 8px;font-weight:600}.draft-notice{border-left:3px solid var(--accent);padding:8px 0 8px 22px;color:var(--muted);font-size:1rem}.sia-page .footer-inner{font-size:.875rem}@media(max-width:900px){.sia-page nav{gap:0}.sia-section{grid-template-columns:45px 1fr;gap:20px}.sia-hero{padding-top:48px}}@media(max-width:560px){.sia-brand span{font-size:.59rem}.sia-brand strong{font-size:2.2rem}.sia-hero h1{font-size:2.65rem}.sia-lead{font-size:1rem;margin-top:25px}.sia-section{grid-template-columns:1fr;gap:12px;padding:35px 0}.sia-content{padding-bottom:35px}.sia-hero .eyebrow{font-size:.8125rem}.sia-lead .text-link{margin:18px 18px 0 0}.sia-page .header-inner{gap:12px}.sia-page .prototype-banner .shell{display:flex;flex-wrap:wrap;gap:3px 12px}.sia-page .prototype-banner p{width:100%;order:3}}