/* Neutral-brochure production stylesheet.
   Buyer-safe design tokens (--site- prefix). Mobile-first. WCAG 2.1 AA. */
:root {
  --site-color-background: #ffffff;
  --site-color-surface: #f5f5f5;
  --site-color-text-primary: #1a1a1a;
  --site-color-text-secondary: #595959;
  --site-color-primary: #1f4b8e;
  --site-color-on-primary: #ffffff;
  --site-color-border: #d9d9d9;
  --site-color-error: #b3261e;
  --site-font-heading: Georgia;
  --site-font-body: system-ui;
  --site-density: comfortable;
  --site-motion: none;
  --site-maxw: 72rem;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  color-scheme: light;
  background: var(--site-color-background);
  color: var(--site-color-text-primary);
  font-family: var(--site-font-body), system-ui, sans-serif;
  line-height: 1.6;
}
body { margin: 0; }
h1, h2, h3, h4 {
  font-family: var(--site-font-heading), Georgia, serif;
  line-height: 1.15;
  margin: 0 0 0.5em;
}
p { margin: 0 0 1rem; }
a { color: var(--site-color-primary); }
img { max-width: 100%; height: auto; }
*:focus-visible { outline: 2px solid var(--site-color-primary); outline-offset: 2px; }

/* Skip link */
.skip-link {
  position: absolute; left: -10000px; top: auto;
  width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed; left: 1rem; top: 1rem;
  width: auto; height: auto; padding: 0.75rem 1rem;
  background: var(--site-color-surface); color: var(--site-color-text-primary);
  border: 2px solid var(--site-color-primary); z-index: 1000;
}

/* Shared width + inline padding */
.site-header .nav, .main > *, .site-footer {
  max-width: var(--site-maxw);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--site-color-background);
  border-bottom: 1px solid var(--site-color-border);
}
.nav {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 0.75rem; padding-block: 0.75rem;
}
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--site-color-surface); color: var(--site-color-text-primary);
  border: 1px solid var(--site-color-border); border-radius: 0.375rem;
  padding: 0.5rem 0.75rem; font: inherit; cursor: pointer;
}
.nav__list {
  list-style: none; display: flex; flex-wrap: wrap;
  gap: 0.25rem 1rem; margin: 0; padding: 0; flex: 1 1 100%;
}
.nav__link { display: inline-block; padding: 0.5rem 0.25rem; text-decoration: none; }
.nav__link[aria-current="page"] { text-decoration: underline; font-weight: 600; }
.nav__cta {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--site-color-primary); color: var(--site-color-on-primary);
  text-decoration: none; padding: 0.5rem 1rem; border-radius: 0.375rem;
}

/* Progressive-enhancement mobile nav: only collapse when JS is active */
html[data-js="true"] .nav__list { display: none; }
html[data-js="true"] .nav__list[data-open="true"] { display: flex; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.75rem 1.25rem; border-radius: 0.375rem; border: 1px solid;
  border-color: var(--site-color-primary);
  font: inherit; text-decoration: none; cursor: pointer;
}
.btn--primary {
  background: var(--site-color-primary); color: var(--site-color-on-primary);
  border-color: var(--site-color-primary);
}

/* Hero */
.hero { padding-block: 3rem; text-align: center; }
.hero__title { font-size: clamp(2rem, 5vw, 3rem); }
.hero__lede {
  color: var(--site-color-text-secondary); font-size: 1.125rem;
  max-width: 48rem; margin-inline: auto;
}
.hero__cta { margin-top: 1.5rem; }

/* CTA band */
.cta {
  padding-block: 2.5rem; margin-block: 2rem; text-align: center;
  background: var(--site-color-surface); border-radius: 0.5rem;
}

/* Content block */
.content { padding-block: 2.5rem; }

/* Contact form (form-two-column; stacked on mobile) */
.contact { padding-block: 2.5rem; }
.contact__form { display: grid; grid-template-columns: 1fr; gap: 1rem; max-width: 48rem; }
.form__field { display: flex; flex-direction: column; gap: 0.375rem; }
.form__label { font-weight: 600; }
.form__input {
  width: 100%; padding: 0.625rem 0.75rem; font: inherit;
  color: var(--site-color-text-primary); background: var(--site-color-background);
  border: 1px solid var(--site-color-border); border-radius: 0.375rem;
}
.form__input[aria-invalid="true"] { border-color: var(--site-color-error); }
.form__actions { margin-top: 0.5rem; }

/* Footer */
.site-footer {
  padding-block: 2.5rem; border-top: 1px solid var(--site-color-border);
  color: var(--site-color-text-secondary);
}
.footer-nav__list {
  list-style: none; display: flex; flex-wrap: wrap;
  gap: 0.5rem 1.5rem; margin: 0 0 1rem; padding: 0;
}
.footer-nav__list a { text-decoration: none; }
.site-footer__tagline:empty, .site-footer__copyright:empty { display: none; }

/* Target size: AA minimum (24px) at mobile */
.nav__link, .nav__cta, .nav-toggle, .btn, .form__input, button, summary {
  min-height: 1.5rem;
}

/* Tablet */
@media (min-width: 48em) {
  .nav-toggle { display: none; }
  html[data-js="true"] .nav__list { display: flex; }
  .nav__list { flex: 1 1 auto; justify-content: center; }
  .contact__form { grid-template-columns: 1fr 1fr; }
  .form__field--full { grid-column: 1 / -1; }
  .nav__link, .nav__cta, .nav-toggle, .btn, .form__input,
  button, summary, input, textarea, [role="button"] {
    min-height: 2.75rem;
  }
  .nav__cta, .btn { min-width: 2.75rem; }
}

/* Desktop */
@media (min-width: 75em) {
  .hero { padding-block: 4.5rem; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}