.site-header {
    position: fixed;
    z-index: 1040;
    top: var(--versai-admin-bar-offset);
    right: 0;
    left: 0;
    width: 100%;
    color: var(--versai-color-heading);
    background: rgba(255, 253, 247, 0.94);
    border-bottom: 1px solid var(--versai-color-border);
    box-shadow: var(--versai-shadow-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(calc(-100% - 1rem));
    transition:
        transform var(--versai-transition-slow),
        opacity var(--versai-transition-base),
        visibility var(--versai-transition-base);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.site-header.is-visible,
.site-header.is-menu-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.site-header__inner {
    position: relative;
    display: flex;
    min-height: var(--versai-header-height);
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.site-branding {
    position: relative;
    z-index: 2;
    display: flex;
    flex: 0 0 auto;
    align-items: center;
}

.site-branding .custom-logo-link {
    display: inline-flex;
    align-items: center;
}

.site-branding .custom-logo {
    display: block;
    width: auto;
    max-width: min(13rem, 40vw);
    max-height: 3.5rem;
    object-fit: contain;
}

.site-branding__title {
    color: var(--versai-color-heading);
    font-size: 1.35rem;
    font-weight: 800;
}

.site-navigation {
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: flex-end;
}

.versai-primary-menu {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: clamp(1rem, 2vw, 2rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.versai-primary-menu .menu-item {
    position: relative;
}

.versai-primary-menu .nav-link,
.versai-primary-menu a {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    color: var(--versai-color-heading);
    font-weight: 600;
}

.versai-primary-menu .current-menu-item > a,
.versai-primary-menu .current-menu-ancestor > a,
.versai-primary-menu a:hover,
.versai-primary-menu a:focus-visible {
    color: var(--versai-color-primary);
}

.versai-primary-menu .sub-menu {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    z-index: 10;
    width: 14rem;
    margin: 0;
    padding: 0.65rem;
    list-style: none;
    background: var(--versai-color-surface);
    border: 1px solid var(--versai-color-border);
    border-radius: var(--versai-radius-md);
    box-shadow: var(--versai-shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(0.5rem);
    transition: var(--versai-transition-base);
}

.versai-primary-menu .menu-item:hover > .sub-menu,
.versai-primary-menu .menu-item:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.versai-primary-menu .sub-menu .sub-menu {
    top: -0.65rem;
    right: calc(100% + 0.4rem);
}

.versai-primary-menu .sub-menu a {
    width: 100%;
    min-height: 2.5rem;
    padding-inline: 0.75rem;
    border-radius: var(--versai-radius-xs);
}

.site-header__toggle {
    display: none;
    width: 2.75rem;
    height: 2.75rem;
    align-items: center;
    justify-content: center;
    padding: 0;
    color: var(--versai-color-heading);
    background: transparent;
    border: 1px solid var(--versai-color-border-strong);
    border-radius: 50%;
}

.site-header__toggle-close {
    display: none;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-open {
    display: none;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-close {
    display: inline-flex;
}