/* ==========================================================================
   SITE HEADER — the single global header component
   Shared verbatim by the homepage (index.html) and every Journal page so the
   header is defined in ONE place. Uses the shared design tokens (--champagne,
   --nav-h, etc.) that each page already declares in its :root.
   The only per-page difference is that the current section carries .is-active.
   ========================================================================== */

.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  height: var(--nav-h);
  padding: 0 var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(5, 5, 5, 0.97);
  border-bottom: 1px solid var(--champagne-faint);
}
.nav__mark {
  display: block;
  animation: none;
}
.nav__mark em {
  font-style: italic;
  color: var(--champagne);
  font-weight: 400;
}
.nav__logo {
  height: 62px;
  width: auto;
  display: block;
  animation: logo-in 1.8s var(--ease-out) 0.3s both;
}
@keyframes logo-in {
  0% { opacity: 0; transform: scale(0.92); }
  100% { opacity: 1; transform: scale(1); }
}
.nav__links { display: flex; gap: 3rem; }
.nav__link {
  font-size: 12px; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--paper); opacity: 0.7;
  transition: opacity 0.3s ease, color 0.3s ease;
  position: relative;
}
.nav__link::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 1px; background: var(--champagne);
  transform: scaleX(0); transform-origin: right center;
  transition: transform 0.5s var(--ease-out);
}
.nav__link:hover { opacity: 1; color: var(--champagne); }
.nav__link:hover::after { transform: scaleX(1); transform-origin: left center; }
/* Active navigation item (the only permitted per-page difference) */
.nav__link.is-active { opacity: 1; color: var(--champagne); }
.nav__link.is-active::after { transform: scaleX(1); transform-origin: left center; }
.nav__cta {
  font-size: 12px; letter-spacing: 0.32em; text-transform: uppercase;
  border: 1px solid var(--champagne-dim);
  padding: 0.85rem 1.4rem;
  color: var(--champagne);
  transition: background 0.4s var(--ease-out), color 0.4s var(--ease-out);
}
.nav__cta:hover { background: var(--champagne); color: var(--onyx); }

.nav__soon {
  font-family: var(--serif);
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--champagne);
  opacity: 0.8;
  margin-left: 0.4rem;
}
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  height: 1px;
  width: 100%;
  background: var(--champagne);
  transition: transform 0.4s var(--ease-out), opacity 0.4s ease;
}
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child  { transform: translateY(-4px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  top: var(--nav-h);
  z-index: 45;
  background: rgba(5, 5, 5, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(3rem, 10vh, 6rem) var(--gutter);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease-out), visibility 0.5s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(1.5rem, 4vh, 2.25rem);
  width: 100%;
  max-width: 420px;
}
.mobile-menu__link {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1.75rem, 6vw, 2.25rem);
  letter-spacing: 0.02em;
  color: var(--bone);
  transition: color 0.4s ease;
  text-align: center;
}
.mobile-menu__link:hover { color: var(--champagne); }
.mobile-menu__link.is-active { color: var(--champagne); }
.mobile-menu__link span {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--champagne);
  opacity: 0.8;
  margin-top: 0.25rem;
}
.mobile-menu__cta {
  margin-top: 1.5rem;
  padding: 1.1rem 2.25rem;
  border: 1px solid var(--champagne);
  color: var(--champagne);
  font-size: 11px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  transition: background 0.5s var(--ease-out), color 0.5s var(--ease-out);
}
.mobile-menu__cta:hover { background: var(--champagne); color: var(--onyx); }

@media (max-width: 900px) {
  .nav__toggle { display: flex; }
  .nav__cta { display: none; }
  .nav__links { display: none; }
}
@media (max-width: 640px) {
  .nav__logo { height: 48px; }
}
@media (max-width: 380px) {
  .nav__logo { height: 42px; }
}