.reference-header{padding-block:3.5rem 2rem;background:linear-gradient(135deg,#e7f2fb,#f7fbff 65%);border-bottom:1px solid var(--border)}.reference-header h1{max-width:19ch;font-size:clamp(2.25rem,8vw,4rem)}.reference-header__lead{max-width:44rem;margin-bottom:.5rem;color:var(--muted);font-size:1.125rem}.reference-layout{display:grid;gap:1.5rem;padding-block:2rem}.source-note,.tool-link-card{margin-block:1.5rem;padding:1.25rem;background:#e7f2fb;border:1px solid #bdd8ee;border-radius:var(--radius)}.source-note p{margin:.5rem 0}.source-note a{color:var(--primary);font-weight:700}.lookup-table th:first-child{min-width:10rem}.reference-aside{padding:1.25rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);align-self:start}.reference-aside h2{margin-bottom:1rem;font-size:1.125rem}.reference-aside dl{margin:0}.reference-aside dl div{padding-block:.75rem;border-top:1px solid var(--border)}.reference-aside dt{font-size:.8125rem;font-weight:800}.reference-aside dd{margin:0;color:var(--muted);font-size:.9375rem}.tool-link-card p{margin-bottom:.75rem}@media(min-width:64rem){.reference-layout{grid-template-columns:minmax(0,1fr) 17rem}.reference-aside{position:sticky;top:1rem}}