/* ==========================================================================
   Digital Fusion — Header & Footer Layout
   ========================================================================== */

/* ==========================================================================
   Site header (split nav, Outside In style)
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: var(--space-sm) var(--gutter);
  transition: transform var(--dur-med) var(--ease-out),
              background var(--dur-med) var(--ease-out),
              backdrop-filter var(--dur-med) var(--ease-out);
  will-change: transform;
}

.site-header--transparent {
  background: transparent;
}

.site-header--solid {
  background: rgba(246, 242, 233, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}

.site-header.nav-up {
  transform: translateY(-110%);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-md);
  max-width: var(--max-w);
  margin-inline: auto;
}

.site-header__brand {
  grid-column: 2;
  display: flex;
  justify-content: center;
  align-items: center;
}

.site-header__brand img {
  height: 44px;
  width: auto;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.site-header__brand:hover img { opacity: 0.75; }

/* Desktop nav (hidden on mobile) */
.site-nav {
  display: none;
}

.site-nav--left { justify-self: start; }
.site-nav--right { justify-self: end; }

.site-nav__list {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2.25rem);
  align-items: center;
}

.site-nav__link {
  font-family: var(--ff-sans);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-primary);
  position: relative;
  padding: 4px 0;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--dur-med) var(--ease-out);
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--accent);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left center;
}

/* Header on dark hero (reverse production) */
.site-header--on-dark .site-nav__link,
.site-header--on-dark.site-header--transparent .site-nav__link {
  color: var(--ink-on-dark);
}
.site-header--on-dark .site-nav__link:hover {
  color: var(--ink-on-dark);
  opacity: 0.75;
}
.site-header--on-dark .site-nav__link::after {
  background: var(--ink-on-dark);
}

/* Mobile menu toggle */
.nav-toggle {
  grid-column: 3;
  justify-self: end;
  width: 44px; height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-primary);
  z-index: 60;
}
.nav-toggle__bars {
  position: relative;
  width: 24px; height: 14px;
  display: block;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur-med) var(--ease-out),
              top var(--dur-med) var(--ease-out),
              bottom var(--dur-med) var(--ease-out);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

.site-header--on-dark .nav-toggle { color: var(--ink-on-dark); }

/* Mobile fullscreen menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 55;
  padding: calc(var(--header-h) + var(--space-xl)) var(--gutter) var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition: opacity var(--dur-med) var(--ease-out),
              transform var(--dur-med) var(--ease-out),
              visibility 0s linear var(--dur-med);
  overflow-y: auto;
}

.mobile-menu[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--dur-med) var(--ease-out),
              transform var(--dur-med) var(--ease-out),
              visibility 0s linear 0s;
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.mobile-menu__link {
  font-family: var(--ff-serif);
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 400;
  line-height: 1;
  color: var(--ink-primary);
  display: inline-block;
  transition: color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.mobile-menu__link:hover,
.mobile-menu__link[aria-current="page"] {
  color: var(--accent);
  transform: translateX(6px);
}

.mobile-menu__footer {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--fs-sm);
  color: var(--ink-muted);
}

body[data-menu-open="true"] { overflow: hidden; }

/* Close (X) button injected inside mobile menu */
.mobile-menu__close {
  position: absolute;
  top: calc(var(--space-sm) + 4px);
  right: var(--gutter);
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: transparent;
  color: var(--ink-primary);
  border: 1px solid var(--border-medium);
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.mobile-menu__close:hover {
  background: var(--ink-primary);
  color: var(--ink-on-dark);
  transform: rotate(90deg);
}

/* Desktop breakpoint */
@media (min-width: 1024px) {
  .site-nav { display: flex; align-items: center; }
  .nav-toggle { display: none; }
  .site-header__brand { grid-column: 2; }
  .site-header { padding: var(--space-md) var(--gutter); }
  .site-header__brand img { height: 56px; }
}

/* ==========================================================================
   Site footer
   ========================================================================== */

.site-footer {
  background: var(--bg-ink);
  color: var(--ink-on-dark);
  padding-block: var(--space-2xl) var(--space-lg);
  margin-top: var(--space-3xl);
}

.site-footer__inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--border-on-dark);
}

@media (min-width: 640px) {
  .site-footer__top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-footer__top {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }
}

.site-footer__brand-block .site-footer__logo img {
  height: 64px;
  width: auto;
  margin-bottom: var(--space-md);
}

.site-footer__tagline {
  font-family: var(--ff-serif);
  font-size: var(--fs-lg);
  font-style: italic;
  color: var(--ink-on-dark);
  max-width: 34ch;
  line-height: 1.4;
}

.site-footer__col-title {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-on-dark-muted);
  margin-bottom: var(--space-md);
}

.site-footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.site-footer__col a {
  color: var(--ink-on-dark);
  font-size: var(--fs-sm);
  padding: 2px 0;
  display: inline-block;
  transition: color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.site-footer__col a:hover {
  color: #8fa995;
  transform: translateX(3px);
}

.site-footer__contact {
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: var(--ink-on-dark-muted);
}
.site-footer__contact a { color: var(--ink-on-dark); }

.site-footer__social {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}
.site-footer__social a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-on-dark);
  opacity: 0.75;
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: opacity var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.site-footer__social a:hover {
  opacity: 1;
  color: #8fa995;
}
.site-footer__social svg {
  display: block;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.site-footer__bottom {
  padding-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-on-dark-muted);
}

.site-footer__bottom a:hover { color: var(--ink-on-dark); }

/* ==========================================================================
   Page scaffolding
   ========================================================================== */

main.page {
  padding-top: calc(var(--header-h) + var(--space-lg));
}

main.page--hero {
  padding-top: 0;
}

.page-hero {
  padding: calc(var(--header-h) + var(--space-2xl)) 0 var(--space-2xl);
  text-align: center;
}

.page-hero h1 {
  margin-bottom: var(--space-md);
}

.page-hero .lede {
  margin-inline: auto;
}