/* =============================================
   EGONEX - Header
   Sticky nav + mobile drawer.
   ============================================= */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1200;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-on-dark);
    backdrop-filter: blur(10px);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: var(--spacing-md);
}

.site-header__brand {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
}

.site-header__logo {
    height: 36px;
    width: auto;
}

.site-header__nav {
    display: none;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.site-nav__item {
    display: inline-flex;
}

.site-nav__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 44px;
    padding-inline: var(--spacing-md);
    border-radius: var(--radius-sm);
    color: var(--text-on-dark-muted);
    font-size: var(--font-size-sm);
    font-weight: 600;
    background: transparent;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav__link::after {
    content: "";
    position: absolute;
    left: var(--spacing-md);
    right: var(--spacing-md);
    bottom: var(--spacing-sm);
    height: 2px;
    border-radius: var(--radius-full);
    background: var(--color-orange);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
    color: var(--text-on-dark);
    background: transparent;
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after {
    transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
    color: var(--text-on-dark);
    background: transparent;
}

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

.site-header__actions {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.menu-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    color: var(--text-on-dark);
    border: 1px solid var(--border-on-dark-light);
    background: transparent;
}

.menu-toggle__bar {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: var(--radius-full);
    background: currentColor;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle.is-open .menu-toggle__bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle.is-open .menu-toggle__bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-open .menu-toggle__bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.mobile-menu {
    position: fixed;
    inset: 72px 0 auto;
    z-index: 1100;
    max-height: calc(100vh - 72px);
    padding: var(--spacing-md);
    background: color-mix(in oklab, var(--bg-dark) 92%, var(--bg-dark-deep) 8%);
    border-bottom: 1px solid var(--border-on-dark);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.mobile-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.mobile-menu__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.mobile-menu__link {
    display: inline-flex;
    align-items: center;
    position: relative;
    min-height: 44px;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    color: var(--text-on-dark-muted);
    font-weight: 600;
    background: transparent;
    transition: color var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link:focus-visible {
    color: var(--text-on-dark);
    background: transparent;
}

.mobile-menu__link::after {
    content: "";
    position: absolute;
    left: var(--spacing-md);
    right: var(--spacing-md);
    bottom: var(--spacing-xs);
    height: 2px;
    border-radius: var(--radius-full);
    background: var(--color-orange);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform var(--transition-base);
}

.mobile-menu__link:hover::after,
.mobile-menu__link:focus-visible::after,
.mobile-menu__link[aria-current="page"]::after {
    transform: scaleX(1);
}

.mobile-menu__link[aria-current="page"] {
    color: var(--text-on-dark);
}

@media (min-width: 1024px) {
    .site-header__inner {
        min-height: 76px;
    }

    .site-header__logo {
        height: 40px;
    }

    .site-header__nav {
        display: block;
    }

    .menu-toggle,
    .mobile-menu {
        display: none;
    }
}