/* =============================================================================
   Header component
   ============================================================================= */

.site-header {
    position: relative;
    z-index: var(--z-header);
    background-color: var(--header-bg-color);
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition-normal), background-color var(--transition-normal);
}

.site-header.is-sticky {
    position: sticky;
    top: 0;
}

.site-header.is-style-transparent {
    background-color: transparent;
    border-bottom-color: transparent;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
}

.site-header.is-style-transparent.is-scrolled {
    background-color: var(--header-bg-color);
    border-bottom-color: var(--color-border);
    position: fixed;
}

.site-header.is-style-glass {
    background-color: rgba(10, 10, 10, 0.6);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-block: var(--space-4);
    min-height: 72px;
}

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

.site-branding__logo {
    display: block;
}

.site-branding__logo img {
    display: block;
    width: auto;
    max-height: var(--header-logo-height);
    object-fit: contain;
}

.site-branding__title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

/* --- Navigation ------------------------------------------------------------ */
.site-nav {
    display: none;
    flex: 1;
    justify-content: center;
}

@media (min-width: 1024px) {
    .site-nav {
        display: flex;
    }
}

.site-nav__menu {
    display: flex;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav__menu li {
    position: relative;
}

.site-nav__menu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav__menu a:hover,
.site-nav__menu a:focus,
.site-nav__menu .current-menu-item > a,
.site-nav__menu .current_page_item > a {
    color: var(--color-text-primary);
    background-color: var(--color-bg-card);
}

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

.site-nav__menu li:hover > .sub-menu,
.site-nav__menu li:focus-within > .sub-menu {
    display: block;
}

/* --- Header actions -------------------------------------------------------- */
.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.site-header__search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.site-header__search-toggle:hover {
    background-color: var(--color-bg-card);
    color: var(--color-text-primary);
}

.site-header__yt-btn,
.site-header__fb-btn {
    display: none;
}

@media (min-width: 768px) {
    .site-header__yt-btn,
    .site-header__fb-btn {
        display: inline-flex;
    }
}

.site-header__yt-btn.btn--primary {
    background-color: #FF0000;
    border-color: #FF0000;
    color: #fff;
}

.site-header__yt-btn.btn--primary:hover,
.site-header__yt-btn.btn--primary:focus {
    background-color: #CC0000;
    border-color: #CC0000;
    color: #fff;
    box-shadow: 0 0 16px rgba(255, 0, 0, 0.3);
}

/* --- Mobile menu toggle ---------------------------------------------------- */
.site-header__menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    gap: 5px;
    padding: 0;
}

@media (min-width: 1024px) {
    .site-header__menu-toggle {
        display: none;
    }
}

.site-header__menu-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

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

/* --- Mobile menu drawer ---------------------------------------------------- */
@media (max-width: 1023px) {
    .site-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: min(320px, 80vw);
        height: 100vh;
        background-color: var(--color-bg-primary);
        border-left: 1px solid var(--color-border);
        padding: var(--space-20) var(--space-6) var(--space-6);
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        z-index: var(--z-overlay);
    }

    .site-nav.is-open {
        display: block;
        transform: translateX(0);
    }

    .site-nav__menu {
        flex-direction: column;
        gap: var(--space-1);
    }

    .site-nav__menu a {
        padding: var(--space-4);
        font-size: var(--text-base);
    }

    .site-nav__menu .sub-menu {
        position: static;
        display: block;
        box-shadow: none;
        border: 0;
        padding: 0 0 0 var(--space-4);
        background: transparent;
    }
}

/* --- Header search bar ----------------------------------------------------- */
.site-header__search {
    padding-block: var(--space-5);
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

/* --- Scrim (for mobile menu overlay) --------------------------------------- */
.menu-scrim {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: calc(var(--z-overlay) - 1);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.menu-scrim.is-visible {
    opacity: 1;
    pointer-events: auto;
}