/**
 * TalentHub Header & Navigation Styles
 * Uses theme CSS variables for consistency
 */

/* ===== Site Header ===== */
.site-header {
    background: var(--color-surface);
    border-bottom: var(--border-width) solid var(--color-border);
    position: relative;
    z-index: var(--z-header);
}

.header-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

/* ===== Logo Area ===== */
.header-logo {
    flex-shrink: 0;
}

.header-logo .custom-logo-link {
    display: block;
    line-height: 0;
}

.header-logo .custom-logo {
    max-height: 50px;
    width: auto;
    display: block;
}

.site-branding {
    line-height: 1;
}

.site-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-family-heading);
}

.site-title a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.site-title a:hover,
.site-title a:focus {
    color: var(--color-primary-dark);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===== Primary Navigation ===== */
.header-nav {
    flex: 1;
    display: none;
}

.primary-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.primary-menu li {
    position: relative;
    margin: 0;
    padding: 0;
}

.primary-menu > li > a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease, border-color 0.3s ease;
    border-bottom: 2px solid transparent;
}

.primary-menu > li > a:hover,
.primary-menu > li > a:focus {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    outline: none;
}

/* Active menu item */
.primary-menu > li.current-menu-item > a,
.primary-menu > li.current_page_item > a,
.primary-menu > li.current-menu-ancestor > a {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* Dropdown menus */
.primary-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    list-style: none;
    margin: 0;
    padding: 0;
    background: var(--color-surface);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    z-index: var(--z-dropdown);
}

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

.primary-menu .sub-menu li {
    margin: 0;
    border-bottom: var(--border-width) solid var(--color-border);
}

.primary-menu .sub-menu li:last-child {
    border-bottom: none;
}

.primary-menu .sub-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    transition: background-color 0.3s ease, color 0.3s ease;
    border-bottom: none;
}

.primary-menu .sub-menu a:hover,
.primary-menu .sub-menu a:focus {
    background-color: var(--color-background);
    color: var(--color-primary);
}

/* ===== User Actions ===== */
.header-actions {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.header-action-link {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--border-radius-md);
    transition: background-color 0.3s ease, color 0.3s ease;
    border: var(--border-width) solid transparent;
}

.header-action-link:hover,
.header-action-link:focus {
    background-color: var(--color-background);
    color: var(--color-primary);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.header-action-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.header-action-primary:hover,
.header-action-primary:focus {
    background-color: var(--color-primary-dark);
    color: white;
}

/* ===== Mobile Menu Toggle ===== */
.mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: calc(var(--z-modal) + 10);
}

.mobile-menu-toggle:hover,
.mobile-menu-toggle:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.menu-icon {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 24px;
}

.menu-icon-bar {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Animated hamburger to X */
.mobile-menu-toggle[aria-expanded="true"] .menu-icon-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .menu-icon-bar:nth-child(2) {
    opacity: 0;
}

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

/* ===== Mobile Menu Overlay ===== */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: var(--z-modal);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ===== Mobile Menu Panel ===== */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: calc(var(--z-modal) + 5);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

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

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: var(--border-width) solid var(--color-border);
    flex-shrink: 0;
}

.mobile-menu-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.mobile-menu-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: none;
    font-size: 2rem;
    line-height: 1;
    color: var(--color-text);
    cursor: pointer;
}

.mobile-menu-close:hover,
.mobile-menu-close:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    color: var(--color-primary);
}

.mobile-menu-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
}

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

.mobile-primary-menu li {
    margin: 0;
    border-bottom: var(--border-width) solid var(--color-border);
}

.mobile-primary-menu li:last-child {
    border-bottom: none;
}

.mobile-primary-menu a {
    display: block;
    padding: var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.mobile-primary-menu a:hover,
.mobile-primary-menu a:focus {
    background-color: var(--color-background);
    color: var(--color-primary);
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.mobile-primary-menu .current-menu-item > a,
.mobile-primary-menu .current_page_item > a {
    background-color: var(--color-background);
    color: var(--color-primary);
}

/* Mobile submenu */
.mobile-primary-menu .sub-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    background-color: var(--color-background);
}

.mobile-primary-menu .sub-menu a {
    padding-left: var(--spacing-xl);
    font-size: 0.9rem;
}

.mobile-menu-actions {
    padding: var(--spacing-md);
    border-top: var(--border-width) solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.mobile-action-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    border: var(--border-width) solid var(--color-border);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.mobile-action-link:hover,
.mobile-action-link:focus {
    background-color: var(--color-background);
    border-color: var(--color-primary);
    color: var(--color-primary);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.mobile-action-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.mobile-action-primary:hover,
.mobile-action-primary:focus {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

/* ===== Accessibility ===== */
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===== Responsive - Desktop ===== */
@media (min-width: 768px) {
    .header-nav {
        display: block;
    }

    .header-actions {
        display: flex;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .mobile-menu,
    .mobile-menu-overlay {
        display: none;
    }
}

/* ===== Responsive - Mobile ===== */
@media (max-width: 767px) {
    .header-container {
        height: 60px;
    }

    .site-title {
        font-size: 1.25rem;
    }

    .header-logo .custom-logo {
        max-height: 40px;
    }
}

/* ===== Dark Mode Support ===== */
[data-theme="dark"] .site-header {
    background: var(--color-surface);
    border-bottom-color: var(--color-border);
}

[data-theme="dark"] .primary-menu .sub-menu,
[data-theme="dark"] .mobile-menu {
    background: var(--color-surface);
    border-color: var(--color-border);
}

[data-theme="dark"] .mobile-menu-overlay {
    background-color: rgba(0, 0, 0, 0.7);
}

/* Prevent body scroll when mobile menu is open */
body.mobile-menu-open {
    overflow: hidden;
}