.skip-link{position:fixed;left:16px;top:-80px;background:var(--lime);padding:12px 18px;border:1px solid var(--ink);z-index:100}.skip-link:focus{top:16px}.app-shell{max-width:1500px;min-height:calc(100vh - 40px);margin:20px auto;background:var(--surface);border:1px solid rgba(255,255,255,.65);border-radius:36px;box-shadow:var(--shadow);overflow:hidden}.site-header{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:36px;padding:22px 32px;border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(241,242,239,.92);backdrop-filter:blur(18px);z-index:20}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--lime);border:1px solid var(--ink)}.menu-button{display:none}.nav-links{display:flex;justify-content:center;gap:26px}.nav-links a{font-size:14px;text-decoration:none;padding:12px 0;border-bottom:2px solid transparent}.nav-links a.active{border-bottom-color:var(--ink)}.header-meta{display:flex;align-items:center;gap:10px}.outline-pill,.round-button{border:1px solid var(--ink);background:transparent}.outline-pill{border-radius:999px;padding:10px 16px;font-size:13px}.round-button{width:44px;height:44px;border-radius:50%;cursor:pointer}.page{padding:72px clamp(24px,5vw,76px) 96px}.page-head{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(250px,.55fr);gap:80px;align-items:end;margin-bottom:58px}.page-head h1,.hero h1{font-size:clamp(54px,7vw,96px);font-weight:450;line-height:.93;letter-spacing:-.06em;margin:16px 0 22px;max-width:1050px}.page-head h1{font-size:clamp(48px,6vw,78px)}.page-head p{font-size:18px;color:var(--muted);max-width:620px}.eyebrow,.technical-label{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:700}.section{margin:110px 0}.section h2{font-size:clamp(36px,5vw,58px);font-weight:450;line-height:1;letter-spacing:-.045em;margin:0 0 24px;max-width:900px}.section-intro{font-size:20px;color:var(--muted);max-width:760px}.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.sidebar-layout{display:grid;grid-template-columns:minmax(250px,.34fr) minmax(0,1fr);gap:28px}.stack{display:grid;gap:18px}footer{display:flex;justify-content:space-between;gap:30px;padding:28px 34px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}footer p{max-width:900px;margin:0}