.header { position: absolute; z-index: 20; top: var(--announcement-height); left: 0; width: 100%; height: var(--header-height); border-bottom: 1px solid rgba(17,17,17,0.12); background: rgba(255,255,255,0.94); color: var(--color-text); backdrop-filter: blur(0.5rem); }
.header__inner { display: grid; height: 100%; grid-template-columns: auto 1fr auto; align-items: center; gap: var(--space-6); }
.header__nav { display: flex; align-items: center; justify-content: center; gap: clamp(1.25rem, 3vw, 2.5rem); }
.header__nav a { position: relative; font-size: var(--font-size-200); font-weight: 600; text-decoration: none; }
.header__nav a::after { content: ""; position: absolute; right: 0; bottom: -0.4rem; left: 0; height: 1px; transform: scaleX(0); background: currentColor; transition: transform var(--transition-fast); }
.header__nav a:hover::after { transform: scaleX(1); }
.header__menu-button { display: none; }
.mobile-menu { width: 100%; max-width: none; height: 100dvh; max-height: none; margin: 0; border: 0; background: var(--color-background); padding: 0; color: var(--color-text); }
.mobile-menu[open] { display: grid; grid-template-rows: auto 1fr auto auto; gap: var(--space-6); padding: var(--space-5) var(--container-gutter) calc(var(--space-6) + env(safe-area-inset-bottom)); }
.mobile-menu::backdrop { background: rgba(38,37,34,0.6); }
.mobile-menu__header { display: flex; align-items: center; justify-content: space-between; }
.mobile-menu__nav { display: flex; flex-direction: column; justify-content: center; gap: var(--space-3); }
.mobile-menu__nav a { display: flex; min-height: 4.5rem; align-items: baseline; gap: 1rem; font-family: var(--font-display); font-size: clamp(2rem, 10vw, 3.25rem); line-height: 1; text-decoration: none; }
.mobile-menu__nav span { color: var(--color-highlight); font-family: var(--font-body); font-size: var(--font-size-100); }
.mobile-menu > p { color: var(--color-text-muted); font-size: var(--font-size-100); text-align: center; }
@media (max-width: 900px) {
  .header__inner { grid-template-columns: auto 1fr auto; }
  .header__nav, .header__cta { display: none; }
  .header__menu-button { display: inline-grid; justify-self: end; }
}