/* ==========================================================================
   HEADER & LOGO
   ========================================================================== */
.logo {
  position: relative;
  z-index: calc(var(--z-nav) + 10);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
  transition: opacity var(--t-fast), visibility var(--t-fast);
}
.logo__mark {
  font-family: var(--font-logo);
  font-size: clamp(1.4rem, 1.2rem + 0.7vw, 1.85rem);
  font-weight: 400;
  letter-spacing: var(--ls-logo);
  text-transform: uppercase;
  text-indent: var(--ls-logo);
  color: var(--color-gold);
}
.logo__sub {
  margin-top: 0.35em;
  font-family: var(--font-display);
  font-size: 0.56rem;
  font-weight: 300;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  text-transform: lowercase;
  color: var(--color-gold);
  opacity: 0.9;
}

.header.is-menu-open .logo,
.header:has(.nav.is-open) .logo {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--t-mid), border-color var(--t-mid),
              backdrop-filter var(--t-mid);
}

.header.is-scrolled {
  background: rgba(10, 15, 23, 0.94);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--color-navy-line);
}

.header.is-menu-open,
.header:has(.nav.is-open) {
  background: transparent;
  backdrop-filter: none;
  border-bottom-color: transparent;
}

.header::before {
  content: "";
  position: absolute;
  inset: 0 0 -3rem 0;
  background: linear-gradient(to bottom, rgba(8, 13, 21, 0.75), transparent);
  opacity: 1;
  transition: opacity var(--t-mid);
  pointer-events: none;
}
.header.is-scrolled::before { opacity: 0; }
.header.is-menu-open::before,
.header:has(.nav.is-open)::before { opacity: 0; }

.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: var(--header-h);
}

.header__actions {
  position: relative;
  z-index: calc(var(--z-nav) + 10);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}