:root {
  color-scheme: light;
  --page: #fafafa;
  --ink: #181818;
  --muted: #565656;
  --rule: #d9d9d9;
  --selection: #dfebdf;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--ink);
  background: var(--page);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
}

::selection { color: var(--ink); background: var(--selection); }

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  overflow-wrap: anywhere;
}

a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--ink); outline-offset: 5px; }

.shell { width: min(100% - 3rem, 45rem); margin-inline: auto; }

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--page);
  transform: translateY(-200%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 3.5rem;
}

.brand { display: inline-flex; flex-shrink: 0; }
.brand img { display: block; width: 10.5rem; height: auto; }
.site-header > a:last-child { font-size: 0.875rem; color: var(--muted); }

main { padding-bottom: 3rem; }
main:focus { outline: none; }

h1, h2, h3 { line-height: 1.2; text-wrap: balance; }
h1 { margin: 0 0 1.5rem; font-size: 2.75rem; font-weight: 550; letter-spacing: -0.03em; }
h2 { margin: 0 0 0.75rem; font-size: 1.375rem; font-weight: 600; letter-spacing: -0.015em; }
h3 { margin: 0 0 0.5rem; font-size: 1rem; font-weight: 650; }
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }
section { margin-top: 2.5rem; }

.intro { font-size: 1.25rem; line-height: 1.6; }
.muted, .updated { color: var(--muted); }
.updated { margin-block: -0.75rem 1.75rem; font-size: 0.875rem; }
.page-link { margin-bottom: 1.5rem; font-size: 0.875rem; }

.research-steps { padding: 0; margin: 1.25rem 0 0; }
.research-steps > div {
  display: grid;
  grid-template-columns: 10.5rem 1fr;
  gap: 1.5rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--rule);
}
.research-steps dt { font-weight: 600; }
.research-steps dd { margin: 0; color: var(--muted); }

.policy-list { padding-left: 1.25rem; margin-block: 1rem; }
.policy-list li { padding-left: 0.25rem; margin-block: 0.625rem; }

.site-footer {
  border-top: 1px solid var(--rule);
  padding-block: 1.25rem 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer p { margin: 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; }

@media (max-width: 36rem) {
  .site-header { padding-block: 2rem 2.75rem; gap: 1rem; }
  .brand img { width: 8rem; }
  h1 { font-size: 2.125rem; }
  .research-steps > div { grid-template-columns: 1fr; gap: 0.375rem; }
  .site-footer { flex-direction: column; gap: 0.75rem; }
}

@media print {
  :root { --page: white; --ink: black; --muted: #333; }
  .site-header, .site-footer, .skip-link, .page-link { display: none; }
  .shell { width: 100%; }
  h1 { font-size: 24pt; }
  h2, h3 { break-after: avoid; }
  p, li { orphans: 3; widows: 3; }
}