/**
 * Header Styles
 */

/* ==========================================================================
   Site Header
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

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

/* ==========================================================================
   Site Branding / Logo
   ========================================================================== */

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

.site-logo {
    display: flex;
    align-items: center;
    color: var(--color-text);
    text-decoration: none;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text-top {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: 0.15em;
}

.logo-text-bottom {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 800;
    letter-spacing: 0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.custom-logo-link {
    display: block;
}

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

/* ==========================================================================
   Header Right (Search + Menu Toggle)
   ========================================================================== */

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.search-toggle,
.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.search-toggle:hover,
.menu-toggle:hover {
    color: var(--color-primary);
}

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

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background: currentColor;
    transition: all var(--transition-fast);
}

.menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==========================================================================
   Main Navigation
   ========================================================================== */

.main-navigation {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg-dark);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg);
}

.main-navigation.is-active {
    display: block;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-menu li {
    list-style: none;
}

.nav-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--button-radius);
    transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu .current-menu-item a,
.nav-menu .current_page_item a {
    background: var(--color-bg-card);
    color: var(--color-primary);
}

/* ==========================================================================
   Search Overlay
   ========================================================================== */

.search-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(10px);
}

.search-overlay.is-active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-overlay-inner {
    width: 100%;
    max-width: 600px;
    padding: var(--spacing-xl);
}

.search-overlay .search-form {
    display: flex;
    gap: var(--spacing-md);
}

.search-overlay .search-field {
    flex: 1;
    font-size: var(--text-xl);
    padding: var(--spacing-md) var(--spacing-lg);
}

.search-overlay .search-submit {
    padding: var(--spacing-md) var(--spacing-xl);
}

.search-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    padding: 0;
    background: transparent;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

/* ==========================================================================
   Desktop Navigation
   ========================================================================== */

@media (min-width: 769px) {
    .menu-toggle {
        display: none;
    }

    .main-navigation {
        display: block;
        position: static;
        background: transparent;
        border: none;
        padding: 0;
    }

    .nav-menu {
        flex-direction: row;
        gap: var(--spacing-xs);
    }

    .nav-menu a {
        font-size: var(--text-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .nav-menu a:hover,
    .nav-menu .current-menu-item a,
    .nav-menu .current_page_item a {
        background: transparent;
        color: var(--color-primary);
    }
}

/* ==========================================================================
   Smaller screens
   ========================================================================== */

@media (max-width: 480px) {
    .logo-text-top {
        font-size: 0.625rem;
    }

    .logo-text-bottom {
        font-size: var(--text-xl);
    }
}