/* =====================================================
   Header & Navigation — Fifth Ave Ltd
   Fixed header, transparent over the dark page heroes,
   frosted ink surface once scrolled (.is-scrolled from main.js).
   All values use CSS custom properties only.
   ===================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background-color: transparent;
    border-bottom: 1px solid transparent;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.site-header.is-scrolled {
    background-color: rgba(var(--color-dark-rgb), 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom-color: var(--color-divider-on-dark);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--section-px);
    height: 78px;
}

/* ---- Logo ---- */
.site-logo {
    display: flex;
    align-items: center;
    gap: 13px;
    flex-shrink: 0;
    text-decoration: none;
    margin-right: var(--space-8);
}

.site-logo img {
    display: block;
    max-height: 56px;
    width: auto;
}

/* Wordmark fallback when no logo image is set */
.site-name {
    font-family: var(--font-heading);
    font-weight: var(--fw-heading);
    font-size: 19px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-white);
    text-decoration: none;
}

/* ---- Navigation ---- */
.nav-primary {
    display: flex;
    align-items: center;
    flex: 1;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: clamp(16px, 2.4vw, 34px);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.02em;
    color: var(--color-on-dark);
    text-decoration: none;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: border-color var(--ease-base), color var(--ease-base);
}

.nav-menu a:hover {
    border-bottom-color: var(--color-primary);
    color: var(--color-white);
}

.nav-menu .current-menu-item > a,
.nav-menu .current-menu-ancestor > a,
.nav-menu .current_page_item > a {
    border-bottom-color: var(--color-primary);
    color: var(--color-white);
}

/* ---- Header Actions ---- */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-shrink: 0;
}

/* ---- Hamburger toggle ---- */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
    flex-shrink: 0;
}

.menu-toggle svg {
    display: block;
    color: var(--color-white);
    flex-shrink: 0;
}

/* ---- Mobile drawer overlay ---- */
.menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: var(--color-overlay);
    z-index: var(--z-dropdown);
}

.menu-overlay.is-active {
    display: block;
}

/* =====================================================
   Responsive — ≤ 1024px
   ===================================================== */

@media ( max-width: 1024px ) {
    .nav-primary {
        display: none;
    }

    .header-cta {
        display: none !important;
    }

    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .site-logo {
        flex: 1;
        margin-right: 0;
    }
}

/* Small phones — keep the wordmark fallback clear of the hamburger */
@media ( max-width: 480px ) {
    .site-name {
        font-size: 16px;
        letter-spacing: 0.12em;
    }

    .site-logo .fave-brand-mark {
        width: 36px;
        height: 36px;
    }
}

/* =====================================================
   Mobile menu drawer — porcelain panel, ink text
   Markup: templates/navigation/mobile-menu.php
   Toggled by assets/js/header.js (.is-open on #mobile-menu)
   ===================================================== */

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform var(--ease-slow);
}

.mobile-menu.is-open {
    transform: translateX(0);
}

body.menu-open {
    overflow: hidden;
}

.menu-overlay.is-visible {
    display: block;
    position: fixed;
    inset: 0;
    background-color: var(--color-overlay);
    z-index: var(--z-dropdown);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-dark);
}

.mobile-menu-logo img {
    display: block;
    max-height: 48px;
    width: auto;
}

.mobile-menu-logo--default {
    display: inline-flex;
    align-items: center;
    gap: 13px;
}

.mobile-menu-logo--default .fave-brand-mark {
    width: 36px;
    height: 36px;
}

.mobile-menu-site-name {
    font-family: var(--font-heading);
    font-weight: var(--fw-heading);
    font-size: var(--text-body-lg);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-white);
}

.menu-close {
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
    color: var(--color-white);
}

.menu-close svg {
    display: block;
}

.mobile-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4) var(--space-6);
}

.mobile-nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-nav-menu > li {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav-menu a {
    flex: 1;
    display: block;
    padding: var(--space-4) 0;
    font-family: var(--font-body);
    font-size: 17px;
    font-weight: var(--fw-semibold);
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--ease-base);
}

.mobile-nav-menu a:hover,
.mobile-nav-menu .current-menu-item > a {
    color: var(--color-primary-dark);
}

/* Sub-menu accordion — toggle button injected by header.js */
.submenu-toggle {
    background: none;
    border: none;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-body-lg);
    line-height: 1;
    color: var(--color-muted);
    cursor: pointer;
}

.mobile-nav-menu .sub-menu {
    display: none;
    width: 100%;
    list-style: none;
    margin: 0;
    padding: 0 0 var(--space-3) var(--space-4);
}

.mobile-nav-menu li.is-open > .sub-menu {
    display: block;
}

.mobile-nav-menu .sub-menu a {
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
    color: var(--color-muted);
}

.mobile-menu-footer {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-6);
    border-top: 1px solid var(--color-border);
}

.mobile-phone {
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: var(--fw-medium);
    color: var(--color-text);
    text-decoration: none;
    text-align: center;
}

.mobile-cta {
    width: 100%;
}

/* =====================================================
   Mega menu panel (kept for future use)
   ===================================================== */

.mega-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
}

.mega-menu.is-active {
    display: block;
}

.mega-menu-inner {
    max-width: var(--container-max);
    margin-inline: auto;
    padding: var(--space-8) var(--space-6);
}