/* ==========================================================================
   PABU 2026 — Header Styles
   ========================================================================== */

/* ---------- Top Bar ---------- */
.topbar {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-xs);
    padding: var(--space-2) 0;
    position: relative;
    z-index: 1001;
}

.topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.topbar-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.topbar-item:hover {
    color: var(--color-secondary);
}

.topbar-item svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.topbar-social {
    display: flex;
    gap: var(--space-3);
}

.topbar-social a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
    display: flex;
}

.topbar-social a:hover {
    color: var(--color-secondary);
}

.topbar-social svg {
    width: 16px;
    height: 16px;
}

/* ---------- Site Header ---------- */
.site-header {
    background: var(--color-white);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow var(--transition-base);
    border-bottom: 1px solid var(--color-gray-100);
}

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

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

/* ---------- Logo ---------- */
.site-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.site-logo img {
    height: 50px;
    width: auto;
}

/* ---------- Desktop Navigation ---------- */
.main-nav {
    display: flex;
    align-items: center;
}

.main-nav .menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.main-nav .menu-item {
    position: relative;
}

.main-nav .nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.main-nav .nav-link:hover,
.main-nav .menu-item.active .nav-link,
.main-nav .menu-item.current-menu-item .nav-link {
    color: var(--color-primary);
    background: var(--color-primary-50);
}

.main-nav .dropdown-icon {
    transition: transform var(--transition-fast);
}

.main-nav .has-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

/* Sub-menu */
.main-nav .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-100);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-base);
}

.main-nav .has-dropdown:hover .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-nav .sub-menu .nav-link {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
}

/* ---------- Header CTA ---------- */
.header-cta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header-cta .btn {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-5);
}

/* ---------- Mobile Menu Toggle ---------- */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    z-index: 1002;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
    display: block;
}

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

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

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

/* ---------- Mobile Navigation ---------- */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-white);
    z-index: 999;
    padding: calc(var(--header-height) + var(--space-12)) var(--space-6) var(--space-8);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-base);
}

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

.mobile-nav .menu {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mobile-nav .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav .nav-link:hover,
.mobile-nav .active .nav-link {
    color: var(--color-primary);
    background: var(--color-primary-50);
}

.mobile-nav .sub-menu {
    padding-left: var(--space-6);
}

.mobile-nav .sub-menu .nav-link {
    font-size: var(--text-base);
    padding: var(--space-3) var(--space-4);
}

.mobile-nav-cta {
    margin-top: var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.mobile-nav-cta .btn {
    width: 100%;
    justify-content: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
    .main-nav,
    .header-cta {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .mobile-nav {
        display: block;
    }
}

@media (max-width: 768px) {
    .topbar-left .topbar-item:not(:first-child) {
        display: none;
    }
    .site-logo img {
        height: 40px;
    }
}

@media (max-width: 576px) {
    .topbar {
        display: none;
    }
}