/**
 * BH Coastal — Navigation (refined visual design, Stage 2)
 * -----------------------------------------------------------
 * Architecture is unchanged from Stage 1: nav.js still owns the
 * single source of truth for header/footer markup, the mobile
 * toggle behavior, and the active-link logic. This file only adds
 * the approved visual system on top of that existing structure —
 * palette, type, spacing — via the same class names nav.js already
 * outputs (.nav-bar, .nav-logo, .nav-toggle, .nav-menu, .nav-list,
 * .nav-item, .footer-inner, .footer-nav, .footer-meta).
 *
 * Header: ivory ground, hairline bottom border, serif wordmark left,
 * wide-tracked uppercase nav right. No icon hamburger — the mobile
 * toggle stays a plain text control ("Menu"), in keeping with the
 * minimal-navigation principle rather than a generic app affordance.
 *
 * Footer: inverted to navy/ivory — the one deliberate color reversal
 * on the site, marking it clearly as the close of the page.
 */

#site-header {
  position: relative;
  z-index: 20;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--page-max-width);
  margin-inline: auto;
  padding: var(--space-3) var(--gutter);
  min-height: var(--header-height);
}

@media (min-width: 768px) {
  .nav-bar {
    padding: var(--space-3) var(--gutter-md);
    min-height: var(--header-height-desktop);
  }
}

@media (min-width: 1024px) {
  .nav-bar {
    padding-inline: var(--gutter-lg);
  }
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  letter-spacing: 0.03em;
  color: var(--color-navy);
  background-image: none;
  display: inline-flex;
  align-items: center;
}

.nav-logo img {
  height: 2.25rem;
  width: auto;
  display: block;
}

@media (min-width: 768px) {
  .nav-logo img {
    height: 2.75rem;
  }
}

.nav-toggle {
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  color: var(--color-navy);
  padding: var(--space-1) 0;
  border-bottom: 1px solid var(--color-navy);
}

.nav-menu {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-list {
  padding: var(--space-2) var(--gutter) var(--space-3);
}

.nav-item a {
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  color: var(--color-navy);
  background-image: none;
  padding: var(--space-2) 0;
  border-bottom: 1px solid transparent;
}

.nav-item a.is-active {
  color: var(--color-navy);
  font-weight: var(--fw-semibold);
  border-bottom-color: var(--color-navy);
}

.nav-item a:hover,
.nav-item a:focus-visible {
  color: var(--color-navy-soft);
  border-bottom-color: var(--color-sandstone);
}

/* Desktop: inline nav, no toggle, no divider under the bar */
@media (min-width: 768px) {
  .nav-menu {
    background: transparent;
    border-bottom: 0;
  }

  .nav-list {
    padding: 0;
    gap: var(--space-5);
  }

  .nav-item a {
    padding: var(--space-1) 0;
  }
}

/* ---------- Footer ---------- */

#site-footer {
  background: var(--color-inverse-bg);
  color: var(--color-inverse-text);
  border-top: 1px solid var(--color-navy-soft);
}

.footer-inner {
  max-width: var(--page-max-width);
  margin-inline: auto;
  padding: var(--space-6) var(--gutter);
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .footer-inner {
    padding: var(--space-6) var(--gutter-md);
  }
}

@media (min-width: 1024px) {
  .footer-inner {
    padding: var(--space-6) var(--gutter-lg);
  }
}

.footer-nav {
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  gap: var(--space-1) var(--space-4);
}

.footer-nav a {
  color: var(--color-ivory);
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0% 1px;
  transition: background-size var(--duration-base) var(--ease-standard);
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  background-size: 100% 1px;
}

.footer-meta {
  font-family: var(--font-sans);
  color: var(--color-sandstone);
  letter-spacing: 0.02em;
}

/* Keyboard focus visibility, non-negotiable regardless of visual system */
.nav-item a:focus-visible,
.footer-nav a:focus-visible,
.nav-toggle:focus-visible {
  outline: 1px solid var(--color-navy);
  outline-offset: 3px;
}

#site-footer a:focus-visible {
  outline-color: var(--color-ivory);
}