/* ─── SITE HEADER ─── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--pb-white);
    border-bottom: 1px solid var(--pb-gray-200);
    box-shadow: var(--pb-shadow-sm);
    transition: box-shadow var(--pb-transition-base);
}

.site-header.scrolled {
    box-shadow: var(--pb-shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--pb-space-8);
    height: 80px;
}

/* ─── LOGO ─── */
.site-branding { flex-shrink: 0; }

.custom-logo {
    height: 48px;
    width: auto;
    display: block;
}

.site-title-link {
    font-family: var(--pb-font-display);
    font-size: var(--pb-text-xl);
    font-weight: var(--pb-weight-black);
    color: var(--pb-black);
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

/* ─── PRIMARY NAV WRAPPER ─── */
.site-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* ─── NAV LIST ─── */
.primary-nav {
    display: flex;
    align-items: center;
    gap: var(--pb-space-1);
    margin: 0;
    padding: 0;
}

.primary-nav > li { position: relative; }

.primary-nav > li > a {
    display: flex;
    align-items: center;
    padding: var(--pb-space-3) var(--pb-space-4);
    min-height: 44px;
    font-family: var(--pb-font-display);
    font-size: var(--pb-text-sm);
    font-weight: var(--pb-weight-semibold);
    color: var(--pb-gray-900);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    border-radius: var(--pb-radius-sm);
    transition: color var(--pb-transition-fast), background-color var(--pb-transition-fast);
}

.primary-nav > li > a:hover,
.primary-nav > li.current-menu-item > a,
.primary-nav > li.current-menu-ancestor > a {
    color: var(--pb-blue-dark);
    background-color: var(--pb-blue-lt);
}

.primary-nav > li > a:focus-visible {
    outline: 2px solid var(--pb-blue);
    outline-offset: 2px;
    color: var(--pb-blue-dark);
}

/* ─── DROPDOWN ─── */
.primary-nav .sub-menu {
    position: absolute;
    top: calc(100% + var(--pb-space-2));
    left: 0;
    min-width: 220px;
    background-color: var(--pb-white);
    border: 1px solid var(--pb-gray-200);
    border-radius: var(--pb-radius-md);
    box-shadow: var(--pb-shadow-lg);
    padding: var(--pb-space-2) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--pb-transition-fast),
                transform var(--pb-transition-fast),
                visibility var(--pb-transition-fast);
    z-index: 200;
}

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

.primary-nav .sub-menu li a {
    display: block;
    padding: var(--pb-space-3) var(--pb-space-6);
    font-size: var(--pb-text-sm);
    font-weight: var(--pb-weight-medium);
    color: var(--pb-gray-700);
    transition: color var(--pb-transition-fast), background-color var(--pb-transition-fast);
}

.primary-nav .sub-menu li a:hover {
    color: var(--pb-blue-dark);
    background-color: var(--pb-blue-lt);
}

/* ─── SERVICES MEGA-MENU (Session 9 IA restructure) ───
   Reuses .sub-menu's show/hide mechanics (hover/focus-within on desktop,
   .sub-open toggle on mobile via main.js) — only size/layout differ. ─── */
.primary-nav .sub-menu.mega-menu {
    min-width: 640px;
    max-width: 760px;
    left: 50%;
    padding: var(--pb-space-6);
    transform: translate(-50%, -8px);
}

.primary-nav > li:hover > .sub-menu.mega-menu,
.primary-nav > li:focus-within > .sub-menu.mega-menu {
    transform: translate(-50%, 0);
}

.mega-menu__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--pb-space-6);
}

.mega-menu__col-heading {
    display: block;
    font-family: var(--pb-font-display);
    font-size: var(--pb-text-xs);
    font-weight: var(--pb-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--pb-blue-dark);
    padding-bottom: var(--pb-space-2);
    margin-bottom: var(--pb-space-2);
    border-bottom: 1px solid var(--pb-gray-200);
}

.mega-menu__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--pb-space-1);
}

.mega-menu__link {
    display: flex;
    align-items: center;
    gap: var(--pb-space-2);
    min-height: 44px;
    padding: var(--pb-space-2);
    border-radius: var(--pb-radius-sm);
    font-family: var(--pb-font-body);
    font-size: var(--pb-text-sm);
    font-weight: var(--pb-weight-medium);
    color: var(--pb-gray-700);
    text-transform: none;
    letter-spacing: normal;
    transition: color var(--pb-transition-fast), background-color var(--pb-transition-fast);
}

.mega-menu__link:hover {
    color: var(--pb-blue-dark);
    background-color: var(--pb-blue-lt);
}

.mega-menu__link:focus-visible {
    outline: 2px solid var(--pb-blue-dark);
    outline-offset: -2px;
}

.mega-menu__icon {
    display: flex;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--pb-blue);
}

.mega-menu__icon svg { width: 100%; height: 100%; }

.mega-menu__empty {
    font-family: var(--pb-font-body);
    font-size: var(--pb-text-sm);
    font-style: italic;
    color: var(--pb-gray-500);
    margin: 0;
    padding: var(--pb-space-2);
}

.mega-menu__footer {
    margin-top: var(--pb-space-5);
    padding-top: var(--pb-space-4);
    border-top: 1px solid var(--pb-gray-200);
}

.mega-menu__view-all {
    display: inline-flex;
    align-items: center;
    gap: var(--pb-space-2);
    min-height: 44px;
    font-family: var(--pb-font-body);
    font-size: var(--pb-text-sm);
    font-weight: var(--pb-weight-semibold);
    color: var(--pb-blue-dark);
    text-transform: none;
    letter-spacing: normal;
}

.mega-menu__view-all:hover { color: var(--pb-blue); }

/* ─── HEADER ACTIONS ─── */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--pb-space-4);
    flex-shrink: 0;
}

.btn-quote { white-space: nowrap; }

/* ─── LANGUAGE SWITCHER ─── */
.language-switcher {
    display: flex;
    align-items: center;
    gap: var(--pb-space-2);
    font-size: var(--pb-text-sm);
}

.lang-current {
    font-weight: var(--pb-weight-semibold);
    color: var(--pb-gray-900);
    text-transform: uppercase;
}

.lang-switch {
    color: var(--pb-gray-500);
    text-transform: uppercase;
    transition: color var(--pb-transition-fast);
}

.lang-switch:hover { color: var(--pb-blue-dark); }

/* ─── HAMBURGER ─── */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: var(--pb-space-2);
    border-radius: var(--pb-radius-sm);
    transition: background-color var(--pb-transition-fast);
}

.nav-toggle:hover { background-color: var(--pb-gray-100); }

.nav-toggle__bar {
    display: block;
    height: 2px;
    width: 100%;
    background-color: var(--pb-gray-900);
    border-radius: var(--pb-radius-full);
    transition: transform var(--pb-transition-base), opacity var(--pb-transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ─── MOBILE ─── */
@media (max-width: 1024px) {
    .nav-toggle { display: flex; }

    .site-nav {
        position: fixed;
        inset: 80px 0 0 0;
        background-color: var(--pb-white);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--pb-space-8) var(--pb-space-6);
        transform: translateX(100%);
        transition: transform var(--pb-transition-base);
        overflow-y: auto;
        border-top: 1px solid var(--pb-gray-200);
        z-index: 90;
    }

    .site-nav.is-open { transform: translateX(0); }

    .primary-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        width: 100%;
    }

    .primary-nav > li {
        width: 100%;
        border-bottom: 1px solid var(--pb-gray-200);
    }

    .primary-nav > li > a {
        padding: var(--pb-space-4) var(--pb-space-2);
        font-size: var(--pb-text-base);
        width: 100%;
    }

    .primary-nav .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-radius: 0;
        padding: 0 0 0 var(--pb-space-4);
        background-color: var(--pb-gray-50);
        display: none;
    }

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

    /* Mega-menu collapses to a single stacked column on mobile — the existing
       tap-to-expand accordion (main.js) already handles show/hide. */
    .primary-nav .sub-menu.mega-menu {
        position: static;
        left: auto;
        min-width: 0;
        max-width: none;
        transform: none;
        padding: var(--pb-space-2) 0 var(--pb-space-4) var(--pb-space-4);
    }

    .mega-menu__grid {
        grid-template-columns: 1fr;
        gap: var(--pb-space-5);
    }

    .btn-quote { display: none; }

    .header-inner { height: 64px; }
}