/* ==========================================================================
   Header — Desktop nav, megamenu, language switcher, hamburger
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-concrete);
    height: var(--header-height);
}

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

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

.logo:hover {
    opacity: 0.85;
}

.logo-svg {
    display: block;
}

/* --- Desktop nav --- */
.nav-desktop {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-ui);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-ink);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--color-rust);
    background-color: var(--color-rust-light);
}

.nav-chevron {
    transition: transform var(--transition-fast);
}

.has-megamenu:hover .nav-chevron {
    transform: rotate(180deg);
}

/* --- Megamenu --- */
.megamenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 520px;
    background-color: var(--color-white);
    border: 1px solid var(--color-concrete);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(8px);
    transition: all var(--transition-base);
    pointer-events: none;
    z-index: var(--z-overlay);
}

.has-megamenu:hover .megamenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.megamenu-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.megamenu-heading {
    display: block;
    font-family: var(--font-semi);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-steel);
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid var(--color-rust);
}

.megamenu-list li {
    margin-bottom: 2px;
}

.megamenu-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px var(--space-sm);
    font-family: var(--font-ui);
    font-size: var(--text-sm);
    color: var(--color-ink);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.megamenu-list a:hover {
    background-color: var(--color-rust-light);
    color: var(--color-rust);
}

.megamenu-count {
    font-size: var(--text-xs);
    color: var(--color-steel);
    background-color: var(--color-concrete);
    padding: 1px 6px;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.megamenu-rating {
    font-size: var(--text-xs);
    color: var(--color-star);
    font-weight: 600;
}

/* --- Language switcher --- */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 2px;
    background-color: var(--color-concrete);
    border-radius: var(--radius-md);
    padding: 3px;
    flex-shrink: 0;
}

.lang-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 30px;
    font-family: var(--font-ui);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-steel);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.lang-link:hover {
    color: var(--color-ink);
    background-color: var(--color-white);
}

.lang-link.is-active {
    color: var(--color-ink);
    background-color: var(--color-white);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* --- Hamburger button --- */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.hamburger:hover {
    background-color: var(--color-concrete);
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-ink);
    border-radius: 1px;
    transition: all var(--transition-base);
    transform-origin: center;
}

.hamburger.is-open .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.is-open .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.is-open .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Mobile menu drawer --- */
.mobile-menu {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    width: 320px;
    max-width: 85vw;
    background-color: var(--color-white);
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    z-index: var(--z-overlay);
    overflow-y: auto;
}

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

.mobile-menu-inner {
    padding: var(--space-lg);
}

.mobile-nav-list li {
    border-bottom: 1px solid var(--color-concrete);
}

.mobile-nav-list a {
    display: block;
    padding: var(--space-md) var(--space-sm);
    font-family: var(--font-ui);
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-ink);
    transition: color var(--transition-fast);
}

.mobile-nav-list a:hover {
    color: var(--color-rust);
}

.mobile-nav-sub a {
    padding-left: var(--space-xl);
    font-size: var(--text-sm);
    font-weight: 400;
    color: var(--color-steel);
}

.mobile-lang-switcher {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-concrete);
}

.mobile-lang-switcher .lang-link {
    flex: 1;
    height: 40px;
    font-size: var(--text-sm);
    background-color: var(--color-concrete);
    border-radius: var(--radius-md);
}

.mobile-lang-switcher .lang-link.is-active {
    background-color: var(--color-rust);
    color: var(--color-white);
}

/* --- Mobile overlay backdrop --- */
.mobile-overlay {
    position: fixed;
    inset: 0;
    top: var(--header-height);
    background-color: rgba(28, 28, 30, 0.4);
    z-index: calc(var(--z-overlay) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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