.article-header{padding-block:3.5rem 2rem;background:linear-gradient(135deg,#e7f2fb,#f7fbff 65%);border-bottom:1px solid var(--border)}.article-header h1{max-width:19ch;font-size:clamp(2.25rem,8vw,4rem)}.article-header__lead{max-width:44rem;margin-bottom:.5rem;color:var(--muted);font-size:1.125rem}.article-layout{display:grid;gap:1.5rem;padding-block:2rem}.article-body{min-width:0}.article-intro{font-size:1.125rem}.callout{margin-block:2rem;padding:1.25rem;background:#e7f2fb;border:1px solid #bdd8ee;border-radius:var(--radius)}.callout h2{margin-bottom:.5rem;font-size:1.375rem}.article-aside{padding:1.25rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);align-self:start}.article-aside section+section{margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border)}.article-aside h2{margin-bottom:.75rem;font-size:1rem}.article-aside ol{margin:0;padding-left:1.25rem}.article-aside li+li{margin-top:.5rem}.article-aside a{color:var(--primary);font-size:.9375rem}@media(min-width:64rem){.article-layout{grid-template-columns:minmax(0,1fr) 17rem}.article-aside{position:sticky;top:1rem}}