/* Phase 0 shell. Mobile-first, WCAG-minded: 4.5:1 text contrast, visible focus, 44 px targets. */
:root {
  --navy: #0b2545;
  --ink: #1b1f24;
  --muted: #5a6470;
  --line: #d9dee5;
  --accent: #0a66c2;
  --bg: #ffffff;
  --alert: #8a1c1c;
}
* { box-sizing: border-box; }
html { font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 16px; }
body { margin: 0; color: var(--ink); background: var(--bg); line-height: 1.5; }
.skip { position: absolute; left: -999px; top: 0; background: var(--navy); color: #fff; padding: .5rem 1rem; }
.skip:focus { left: 0; z-index: 10; }
.topbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: .5rem; padding: .75rem 1rem; background: var(--navy); color: #fff; }
.brand { color: #fff; text-decoration: none; font-weight: 600; }
.nav { display: flex; gap: .25rem; align-items: center; }
.inline { display: inline; margin: 0; }
.link { background: none; border: 0; color: #fff; text-decoration: underline; cursor: pointer;
  min-height: 44px; padding: 0 .5rem; font: inherit; }
.link.current { text-decoration: none; font-weight: 700; }
.content { max-width: 40rem; margin: 0 auto; padding: 1rem; }
.footer { color: var(--muted); font-size: .875rem; padding: 1rem; text-align: center; }
h1 { font-size: 1.5rem; margin: 1rem 0; }
.button { display: inline-block; background: var(--accent); color: #fff; text-decoration: none;
  padding: .75rem 1.25rem; border-radius: .375rem; border: 0; font: inherit; min-height: 44px; cursor: pointer; }
.button.secondary { background: #fff; color: var(--accent); border: 2px solid var(--accent); }
.muted { color: var(--muted); }
.alert { color: var(--alert); border: 1px solid var(--alert); padding: .5rem .75rem; border-radius: .375rem; }
.facts dt { font-weight: 600; margin-top: .75rem; }
.facts dd { margin: 0; }
.pill { display: inline-block; border: 1px solid var(--line); border-radius: 999px; padding: .1rem .6rem; }
.dev { margin-top: 2rem; border-top: 1px dashed var(--line); padding-top: 1rem; }
:focus-visible { outline: 3px solid #ffbf47; outline-offset: 2px; }