/* ==========================================================================
   Mega Menu & Navigation
   ========================================================================== */

/* ----- Top Bar (Tier 2) ----- */
.top-bar {
    background-color: var(--color-primary-dark);
    color: var(--color-gray-300);
    font-size: 0.8rem;
    padding: var(--space-xs) 0;
}

.top-bar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.top-bar__left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.top-bar__right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.top-bar a {
    color: var(--color-gray-300);
    font-size: 0.8rem;
}

.top-bar a:hover {
    color: var(--color-secondary-light);
}

.top-bar .social-icons {
    gap: var(--space-xs);
}

.top-bar .social-icon {
    width: 28px;
    height: 28px;
}

.top-bar .social-icon svg {
    width: 14px;
    height: 14px;
}

/* ----- Main Header (Tier 3) ----- */
.header-main {
    background-color: var(--color-white);
    position: sticky;
    top: 0;
    z-index: 10000;
    transition: all var(--transition-base);
    border-bottom: 1px solid var(--color-gray-200);
}

.header-main__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    min-height: var(--header-height);
}

.header-main__logo {
    flex-shrink: 0;
}

.header-main__logo .site-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    white-space: nowrap;
}

.header-main__logo .custom-logo,
.header-main__logo .site-logo-img {
    height: 60px;
    max-height: 60px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    transition: height var(--transition-base), max-height var(--transition-base);
}

.site-header--scrolled .header-main__logo .custom-logo,
.site-header--scrolled .header-main__logo .site-logo-img {
    height: 45px;
    max-height: 45px;
}

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

/* ----- Nav ----- */
.primary-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.primary-nav__list {
    display: flex;
    align-items: center;
    gap: 0;
}

.primary-nav__item {
    position: relative;
}

.primary-nav__link {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: var(--space-md) var(--space-md);
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
    transition: color var(--transition-fast);
    position: relative;
}

.primary-nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-md);
    right: var(--space-md);
    height: 2px;
    background-color: var(--color-secondary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.primary-nav__link:hover::after,
.primary-nav__item.is-active .primary-nav__link::after {
    transform: scaleX(1);
}

.primary-nav__link:hover {
    color: var(--color-primary);
}

.primary-nav__arrow {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    margin-left: 2px;
    transition: transform var(--transition-fast);
}

.primary-nav__item:hover .primary-nav__arrow,
.primary-nav__item.is-open .primary-nav__arrow {
    transform: rotate(180deg);
}

/* ----- Give/Donate CTA ----- */
.nav-cta {
    margin-left: var(--space-sm);
}

/* ----- Mega Menu Panels ----- */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 480px;
    background: var(--color-white);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(10px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    z-index: 9999;
    border-top: 3px solid var(--color-secondary);
}

.primary-nav__item:hover .mega-menu,
.primary-nav__item.is-open .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.mega-menu__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.mega-menu--single .mega-menu__inner {
    grid-template-columns: 1fr;
}

.mega-menu__section {
    padding: var(--space-xl);
}

.mega-menu__section + .mega-menu__section {
    border-left: 1px solid var(--color-gray-200);
}

.mega-menu__section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.mega-menu__link {
    display: block;
    padding: var(--space-sm) 0;
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.mega-menu__link:hover {
    color: var(--color-secondary);
}

.mega-menu__link-desc {
    display: block;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* ----- Mobile Nav ----- */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.mobile-menu-toggle.is-active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.is-active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.is-active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
}

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

/* ----- Responsive ----- */
@media (max-width: 1024px) {
    .primary-nav__list {
        position: fixed;
        top: 0;
        right: -320px;
        width: 320px;
        height: 100vh;
        flex-direction: column;
        align-items: stretch;
        background: var(--color-white);
        z-index: 9999;
        padding: var(--space-3xl) var(--space-xl);
        overflow-y: auto;
        transition: right var(--transition-base);
        box-shadow: var(--shadow-xl);
        gap: 0;
    }

    .primary-nav__list.is-open {
        right: 0;
    }

    .primary-nav__link {
        padding: var(--space-md) 0;
        border-bottom: 1px solid var(--color-gray-100);
    }

    .primary-nav__link::after {
        display: none;
    }

    .mega-menu {
        position: static;
        transform: none;
        min-width: auto;
        box-shadow: none;
        border-radius: 0;
        border-top: none;
        background: var(--color-off-white);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base), opacity var(--transition-base);
        opacity: 0;
        visibility: hidden;
    }

    .primary-nav__item.is-open .mega-menu {
        max-height: 500px;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .mega-menu__inner {
        grid-template-columns: 1fr;
    }

    .mega-menu__section + .mega-menu__section {
        border-left: none;
        border-top: 1px solid var(--color-gray-200);
    }

    .mega-menu__section {
        padding: var(--space-md);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-close {
        display: block;
        position: absolute;
        top: var(--space-md);
        right: var(--space-md);
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--color-text);
        width: 32px;
        height: 32px;
        z-index: 10;
    }

    .nav-cta {
        margin-left: 0;
        margin-top: var(--space-md);
    }

    .top-bar {
        display: none;
    }
}