/* ==========================================================================
   Layout — containers, page structure, header & footer shells
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--section-gap);
}

.section--alt {
  background-color: var(--color-surface-alt);
}

/* --- Section heading block ------------------------------------------------ */

.section-head {
  margin-block-end: var(--space-xl);
}

.section-head__title {
  color: var(--color-orange-dark);
  font-weight: var(--weight-regular);
  letter-spacing: var(--tracking-tight);
}

.section-head__kicker {
  margin-block-start: var(--space-3xs);
  color: var(--color-orange-deep);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.section-head--centred {
  text-align: center;
}

/* --- Page hero (shared by the interior pages) ----------------------------- */

.page-hero {
  padding-block: clamp(var(--space-xl), 5vw, var(--space-3xl)) var(--section-gap);
}

.page-hero__title {
  max-width: 18ch;
  color: var(--color-teal);
  font-size: var(--text-2xl);
}

.page-hero__lede {
  max-width: 46ch;
  margin-block-start: var(--space-md);
  color: var(--color-orange-deep);
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  text-wrap: balance;
}

.page-hero__intro {
  max-width: 62ch;
  margin-block-start: var(--space-lg);
}

@media (min-width: 48em) {
  .page-hero__intro {
    margin-inline-start: clamp(0px, 8vw, 8rem);
  }
}

.page-hero__media {
  margin-block-start: clamp(var(--space-xl), 4vw, var(--space-2xl));
  aspect-ratio: 21 / 9;
}

/* A following .section brings its own top padding. Without this the hero's
   bottom padding and the section's top padding stack into a large void.
   Tinted sections are excluded: they need their padding so the tint does not
   start flush against its own content. */
.page-hero + .section:not(.section--alt) {
  padding-block-start: 0;
}

/* For a hero that ends on a metadata line rather than a block of content, so
   the next element does not float away from it. */
.page-hero--tight {
  padding-block-end: var(--space-2xl);
}

/* --- Site header ---------------------------------------------------------- */

.site-header {
  position: relative;
  overflow: hidden; /* contains the orange panel's right-edge bleed */
  background-color: var(--color-surface);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  column-gap: var(--space-md);
  row-gap: 0;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header__brand {
  flex-shrink: 0;
  padding-block: var(--space-sm);
}

.site-header__brand img {
  width: clamp(150px, 18vw, 218px);
  height: auto;
}

/* Small screens: the nav drops onto its own full-bleed row below the logo. */
.site-header__nav-panel {
  order: 3;
  flex: 1 0 100%;
  margin-inline: calc(var(--gutter) * -1);
}

@media (min-width: 62em) {
  .site-header__inner {
    flex-wrap: nowrap;
    column-gap: var(--space-lg);
    padding-inline-end: 0;
  }

  .site-header__nav-panel {
    position: relative;
    display: flex;
    order: 0;
    flex: 1 1 auto;
    align-items: center;
    justify-content: flex-end;
    align-self: stretch;
    min-height: 5.5rem;
    margin-inline: 0;
    padding-inline: var(--space-xl) var(--gutter);
    background-color: var(--color-orange);
  }

  /* Extend the panel past the container, out to the viewport edge. */
  .site-header__nav-panel::after {
    content: "";
    position: absolute;
    inset-block: 0;
    inset-inline-start: 100%;
    width: 100vw;
    background-color: inherit;
  }
}

/* --- Site footer ---------------------------------------------------------- */

.site-footer {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 48em) {
  .site-footer {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }
}

.site-footer__cta {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-2xl) var(--gutter);
  background-color: var(--color-orange);
  color: var(--color-teal-dark);
}

@media (min-width: 62em) {
  .site-footer__cta {
    padding-inline-start: max(
      var(--gutter),
      calc((100vw - var(--container-max)) / 2 + var(--gutter))
    );
    padding-inline-end: var(--space-2xl);
  }
}

.site-footer__mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-2xl) var(--gutter);
  background-color: var(--color-surface);
  text-align: center;
}

.site-footer__mark img {
  width: min(360px, 100%);
  height: auto;
}

/* Dark ink on the orange panel: white would only reach 2.95:1. */
.footer-cta__quote {
  max-width: 26ch;
  color: var(--color-teal-dark);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug);
}

.footer-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs) var(--space-md);
  margin: var(--space-lg) 0 0;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
}

.footer-cta__links a,
.footer-cta__links .link-button {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

.footer-cta__links a:hover,
.footer-cta__links .link-button:hover {
  /* Colour is already at its accessible limit on orange, so hover thickens
     the underline instead of shifting hue. */
  color: inherit;
  text-decoration-thickness: 2px;
}

.footer-cta__legal {
  margin-block-start: var(--space-2xs);
  color: var(--color-teal-dark);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
}

.footer-cta__legal a {
  color: inherit;
}

.site-footer__tagline {
  max-width: 34ch;
  color: var(--color-muted);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}