/**
 * Header Styles
 * Testing With Renata Theme
 * 
 * Terminal-inspired header with modern navigation.
 */

/* ================================
   SITE HEADER
   ================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-default);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: var(--space-4);
}

/* ================================
   SITE BRANDING
   ================================ */

.site-branding {
    flex-shrink: 0;
}

.site-logo img {
    height: 40px;
    width: auto;
}

.site-title-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.site-title-link:hover {
    color: var(--accent-green);
}

.terminal-prompt-header {
    color: var(--accent-green);
    font-weight: var(--font-bold);
}

.terminal-cursor-header {
    display: inline-block;
    width: 10px;
    height: 18px;
    background-color: var(--accent-green);
    animation: blink 1s step-end infinite;
    margin-left: var(--space-1);
}

/* ================================
   MAIN NAVIGATION
   ================================ */

/* Desktop navigation (inside header) */
.main-navigation-desktop {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

/* Mobile navigation (outside header) - hidden by default */
.main-navigation {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6);
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-default);
    overflow-y: auto;
}

.main-navigation.is-open {
    display: flex;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

/* Hide mobile search on desktop */
.mobile-search-item {
    display: none;
}

.nav-menu li {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.nav-menu .current-menu-item > .nav-link,
.nav-menu .current_page_item > .nav-link {
    color: var(--accent-green);
}

/* Dropdown arrow */
.dropdown-arrow {
    transition: transform var(--transition-fast);
}

.has-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

/* Dropdown menu */
.sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    padding: var(--space-2);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    list-style: none;
    margin: 0;
}

.has-dropdown:hover > .sub-menu,
.has-dropdown:focus-within > .sub-menu {
    display: block;
    animation: fadeInDown 0.2s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sub-menu .nav-link {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

.sub-menu .nav-link:hover {
    background-color: var(--bg-tertiary);
    color: var(--accent-green);
}

/* ================================
   MOBILE MENU TOGGLE
   ================================ */

.header-mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: var(--z-dropdown);
}

.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 24px;
    height: 24px;
    gap: 5px;
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* Hamburger animation when open */
.header-mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header-mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

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

/* ================================
   SEARCH TOGGLE
   ================================ */

.header-search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-secondary);
    background-color: transparent;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.header-search-toggle:hover {
    color: var(--text-primary);
    border-color: var(--accent-green);
    background-color: var(--bg-tertiary);
}

/* ================================
   SEARCH OVERLAY
   ================================ */

.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    background-color: var(--bg-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.search-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.search-overlay-inner {
    width: 100%;
    max-width: 600px;
}

/* Search terminal animation */
.search-terminal {
    transform: translateY(-20px);
    transition: transform var(--transition-base);
}

.search-overlay.is-open .search-terminal {
    transform: translateY(0);
}

/* Search terminal header adjustments */
.search-terminal .terminal-title {
    flex: 1;
    margin-left: var(--space-4);
}

/* Close button */
.search-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-close:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

/* Search terminal body */
.search-terminal .terminal-body {
    padding: var(--space-6);
}

/* Search form layout */
.search-terminal .search-form {
    display: flex;
    gap: var(--space-3);
}

/* Search input field */
.search-terminal .search-field {
    flex: 1;
    padding: var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--text-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    outline: none;
}

.search-terminal .search-field:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px var(--accent-green-muted);
}

.search-terminal .search-field::placeholder {
    color: var(--text-tertiary);
}

/* Search submit button */
.search-terminal .search-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background-color: var(--accent-green);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-terminal .search-submit:hover {
    background-color: var(--accent-green-hover);
}

/* ================================
   MOBILE RESPONSIVE
   ================================ */

@media (max-width: 1023px) {
    /* Show hamburger, hide desktop nav */
    .header-mobile-toggle {
        display: flex;
    }
    
    .main-navigation-desktop {
        display: none;
    }
    
    /* Mobile navigation styles */
    .main-navigation .nav-menu {
        display: flex !important;
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-1);
        list-style: none;
        margin: 0;
        padding: 0;
    }
    
    .main-navigation .nav-link {
        display: flex;
        padding: var(--space-4);
        font-size: var(--text-base);
        border-radius: var(--radius-md);
        color: var(--text-secondary);
    }
    
    .main-navigation .nav-link:hover {
        background-color: var(--bg-tertiary);
        color: var(--text-primary);
    }
    
    /* Mobile dropdown */
    .main-navigation .sub-menu {
        position: static;
        display: none;
        padding: 0;
        padding-left: var(--space-4);
        background: transparent;
        border: none;
        box-shadow: none;
        margin-top: var(--space-2);
    }
    
    .main-navigation .has-dropdown.is-open > .sub-menu {
        display: block;
    }
    
    .main-navigation .sub-menu .nav-link {
        padding: var(--space-3) var(--space-4);
        color: var(--text-secondary);
    }
    
    /* Mobile search item */
    .mobile-search-item {
        display: block;
        margin-bottom: var(--space-4);
        padding-bottom: var(--space-4);
        border-bottom: 1px solid var(--border-default);
    }
}

/* Desktop: hide mobile nav, show desktop nav */
@media (min-width: 1024px) {
    .main-navigation {
        display: none !important;
    }
    
    .main-navigation-desktop {
        display: flex;
    }
}