/* NAS base styles. Logical properties only, so dir="rtl" on <html> mirrors layout. */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-block-size: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--nas-ink);
  background: var(--nas-surface);
}

main { flex: 1 0 auto; }

h1, h2, h3, h4 {
  margin-block: 0 var(--space-4);
  line-height: var(--lh-heading);
  font-weight: 700;
  color: var(--nas-ink);
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin-block: 0 var(--space-4); }

a { color: var(--nas-purple); text-underline-offset: .2em; }
a:hover { color: var(--nas-purple-700); }

img, svg { max-inline-size: 100%; block-size: auto; }

:focus-visible {
  outline: 2px solid var(--nas-teal);
  outline-offset: 2px;
}

.visually-hidden, .sr-only {
  position: absolute !important;
  inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  inset-inline-start: var(--space-4);
  inset-block-start: -100px;
  z-index: 1000;
  padding: var(--space-2) var(--space-4);
  background: var(--nas-purple);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { inset-block-start: var(--space-2); color: #fff; }

.container-nas {
  inline-size: 100%;
  max-inline-size: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.section { padding-block: var(--space-7); }
.section-title {
  text-align: center;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: .04em;
  font-size: var(--fs-h1);
  margin-block-end: var(--space-6);
}
.section-title strong { font-weight: 800; }

.text-muted-nas { color: var(--nas-muted); }

.prose { max-inline-size: 72ch; }
.prose h2 { margin-block-start: var(--space-6); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}