/* UI/UX: layout, header, nav, footer. Mobile first; colours come from tokens.css (fallbacks used until set). */
*, *::before, *::after { box-sizing: border-box; }

.skip-link {
  position: absolute; left: 0.5rem; top: -4rem; z-index: 100;
  padding: 0.75rem 1rem; border-radius: 0.25rem;
  background: var(--color-text, #111); color: var(--color-bg, #fff);
  text-decoration: none; font-weight: 600;
}
.skip-link:focus { top: 0.5rem; }

:where(a, button, input, select, textarea, summary):focus-visible {
  outline: 3px solid var(--color-focus, #ff6a00);
  outline-offset: 2px;
}

.site-header {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--color-header-bg, var(--color-primary, #1d3557));
  color: var(--color-header-text, #fff);
}
.site-header a { color: inherit; }
.brand { font-size: 1.25rem; font-weight: 700; text-decoration: none; }

.site-header nav ul {
  display: flex; flex-wrap: wrap; gap: 0.25rem;
  margin: 0; padding: 0; list-style: none;
}
.site-header nav a {
  display: block; min-height: 44px; padding: 0.6rem 0.9rem;
  border-radius: 0.25rem; text-decoration: none;
}
.site-header nav a:hover { background: rgba(255, 255, 255, 0.15); }
.site-header nav a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.2); font-weight: 700;
  box-shadow: inset 0 -3px 0 currentColor;
}
.site-header :focus-visible { outline-color: var(--color-focus-on-dark, #ffd166); }

main {
  display: block; width: 100%; max-width: 70rem;
  margin: 0 auto; padding: 1.5rem 1rem; min-height: 60vh;
}
img, svg { max-width: 100%; height: auto; }

.site-footer {
  padding: 1.5rem 1rem; text-align: center;
  background: var(--color-footer-bg, #f1f3f5); color: var(--color-footer-text, #222);
}
.site-footer p { margin: 0; }

@media (min-width: 40rem) {
  .site-header {
    flex-direction: row; align-items: center; justify-content: space-between;
    padding: 0.75rem 2rem;
  }
  main { padding: 2rem; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

.site-footer a { color: inherit; }
.site-footer :focus-visible { outline-color: var(--color-focus-on-dark, #ffd166); }