/* ============================================
   Header & Navigation Styles
   ============================================ */

/* --- Sticky Header --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-teal);
    z-index: 1000;
    transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.site-header .container {
    max-width: 100%;
    padding: 0 20px;
}

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

/* --- Logo --- */
.header__logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--text-light);
    flex-shrink: 0;
}

.header__logo:hover {
    opacity: 0.9;
}

.header__logo-img {
    height: 50px;
    width: auto;
    filter: brightness(0) invert(1);
}

/* --- Desktop Navigation --- */
.header__nav {
    display: none;
    flex: 1;
    justify-content: center;
    margin: 0 10px;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 0;
}

.nav__item {
    position: relative;
}

.nav__link {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 10px 14px;
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    transition: background-color var(--transition-fast);
}

.nav__link:hover,
.nav__item.active .nav__link {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--text-light);
}

.nav__arrow {
    font-size: 0.6rem;
    transition: transform var(--transition-fast);
}

/* --- Desktop Dropdown --- */
.nav__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 280px;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px);
    transition: all var(--transition-normal);
    z-index: 100;
}

.nav__item--has-dropdown:hover .nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

.nav__dropdown li a {
    display: block;
    padding: 10px 20px;
    color: var(--text-dark);
    font-size: 0.85rem;
    font-weight: 400;
    text-transform: none;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav__dropdown li a:hover {
    background-color: var(--bg-light-blue);
    color: var(--color-teal);
}

.nav__dropdown li:last-child a {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* --- Header Action Icons --- */
.header__actions {
    display: none;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.header__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--text-light);
    border-radius: var(--radius-round);
    transition: background-color var(--transition-fast);
    font-size: 0.9rem;
}

.header__icon:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--text-light);
}

/* --- Hamburger Button --- */
.header__hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger__line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-light);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* Hamburger active state (X) */
.header__hamburger.active .hamburger__line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header__hamburger.active .hamburger__line:nth-child(2) {
    opacity: 0;
}

.header__hamburger.active .hamburger__line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Mobile Navigation Overlay --- */
.mobile-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--bg-white);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 999;
    padding: 20px 0;
}

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

/* --- Mobile Nav Items --- */
.mobile-nav__item {
    border-bottom: 1px solid #eee;
}

.mobile-nav__link {
    display: block;
    padding: 14px 20px;
    color: var(--text-dark);
    font-size: 1rem;
    font-weight: 600;
}

.mobile-nav__link:hover,
.mobile-nav__link.active {
    color: var(--color-teal);
    background-color: var(--bg-light-blue);
}

.mobile-nav__link-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-nav__link-row .mobile-nav__link {
    flex: 1;
}

.mobile-nav__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.mobile-nav__toggle.open i {
    transform: rotate(180deg);
}

/* --- Mobile Dropdown --- */
.mobile-nav__dropdown {
    display: none;
    background-color: #f8f9fa;
}

.mobile-nav__dropdown.open {
    display: block;
}

.mobile-nav__dropdown li a {
    display: block;
    padding: 10px 20px 10px 40px;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-bottom: 1px solid #eee;
}

.mobile-nav__dropdown li a:hover {
    color: var(--color-teal);
    background-color: var(--bg-light-blue);
}

/* --- Mobile Contact Icons --- */
.mobile-nav__contact {
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 30px 20px;
    border-top: 1px solid #eee;
    margin-top: 10px;
}

.mobile-nav__contact a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-round);
    background-color: var(--color-teal);
    color: var(--text-light);
    font-size: 1.2rem;
    transition: background-color var(--transition-fast);
}

.mobile-nav__contact a:hover {
    background-color: var(--color-teal-dark);
    color: var(--text-light);
}

/* --- Header Language Switcher (Desktop) --- */
.header__lang-switcher {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: 6px;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    padding-left: 8px;
}

.header__lang-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    font-size: 0.75rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    letter-spacing: 0.5px;
}

.header__lang-btn:hover {
    color: var(--text-light);
    background-color: rgba(255, 255, 255, 0.15);
}

.header__lang-btn--active {
    color: var(--text-light);
    background-color: rgba(255, 255, 255, 0.25);
}

/* --- Mobile Language Switcher --- */
.mobile-nav__lang {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    border-top: 1px solid #eee;
    margin-top: 10px;
}

.mobile-nav__lang-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-muted);
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mobile-nav__lang-btn:hover {
    color: var(--color-teal);
    border-color: var(--color-teal);
}

.mobile-nav__lang-btn--active {
    color: var(--text-light);
    background-color: var(--color-teal);
    border-color: var(--color-teal);
}

.mobile-nav__lang-btn--active:hover {
    color: var(--text-light);
    background-color: var(--color-teal-dark);
    border-color: var(--color-teal-dark);
}

/* --- Desktop Display (≥992px handled in responsive.css) --- */