/* =================================
   NAVIGATION COMPONENT
   Header, Desktop меню, Mobile menu, Language switcher
   З animation cascade для mobile menu
   ================================= */

/* ===== HEADER & NAVIGATION ===== */
.main-navigation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-navigation, 1000);
    padding: var(--space-xs) 0;
    transition: all var(--transition-normal) var(--easing-default);
    background: transparent;
}

/* Прозора навігація - білий текст */
.main-navigation:not(.scrolled) .nav-link {
    color: var(--color-white);
}

.main-navigation:not(.scrolled) .nav-logo {
    color: var(--color-white);
}

/* Scrolled навігація - темний текст */
.main-navigation.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.main-navigation.scrolled .nav-link {
    color: #666666;
}

.main-navigation.scrolled .nav-logo {
    color: var(--color-red);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xs);
}

/* ===== ЛОГОТИП ===== */
.nav-logo-section {
    flex: 0 0 auto;
}

.nav-logo {
    font-size: var(--font-medium);
    font-weight: 700;
    color: var(--color-red);
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: color var(--transition-normal) var(--easing-default);
}

.nav-logo:hover {
    color: var(--color-black);
}

/* ===== DESKTOP МЕНЮ ===== */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    font-size: var(--font-base);
    font-weight: 700;
    color: var(--color-white);
    text-decoration: none;
    transition: color var(--transition-normal) var(--easing-default);
    position: relative;
    text-transform: lowercase;
    letter-spacing: 0.5px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-red);
}

/* Анімована підкреслення */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-red);
    transition: width var(--transition-normal) var(--easing-default);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ===== PAGE NUMBER ===== */
.nav-page-number {
    font-size: var(--font-page);
    font-weight: 700;
    color: var(--color-red);
    margin-left: var(--space-xs);
}

/* ===== LANGUAGE SWITCHER (Desktop) ===== */
.language-switcher {
    display: flex;
    gap: 8px;
    align-items: center;
}

.lang-btn {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all var(--transition-normal) ease;
    color: var(--color-black);
    border: 1px solid transparent;
}

.lang-btn:hover {
    background: var(--color-gray);
    color: var(--color-red);
}

.lang-btn.active {
    background: var(--color-red);
    color: white;
    border-color: var(--color-red);
}

/* ===== BURGER MENU BUTTON ===== */
.burger-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
    background: transparent;
    border: none;
}

@media (max-width: 767px) {
    .burger-menu {
        display: flex;
    }
}

/* Гарантія приховування бургер меню на десктопі */
@media (min-width: 768px) {

    .main-navigation .burger-menu,
    .nav-container .burger-menu,
    button.burger-menu {
        display: none;
        visibility: hidden;
    }
}

.burger-line {
    width: 25px;
    height: 2px;
    background: var(--color-white);
    margin: 3px 0;
    transition: all var(--transition-normal) var(--easing-default);
    transform-origin: center;
}

/* Scrolled - червоні лінії */
.main-navigation.scrolled .burger-line {
    background: var(--color-red);
}

/* Burger анімація при відкритті */
.burger-menu.active .burger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger-menu.active .burger-line:nth-child(2) {
    opacity: 0;
}

.burger-menu.active .burger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: var(--color-white);
    z-index: var(--z-mobile-menu, 10000);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    transform: translateX(-100%);
    transition: transform 0.4s var(--easing-default);
    padding: max(env(safe-area-inset-top), 80px) max(env(safe-area-inset-right), 40px) max(env(safe-area-inset-bottom), 40px) max(env(safe-area-inset-left), 40px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

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

.mobile-menu-close {
    position: absolute;
    top: max(env(safe-area-inset-top), 20px);
    right: max(env(safe-area-inset-right), 20px);
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: var(--z-burger-button, 10001);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-line {
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-red);
    transition: all 0.3s ease;
}

.close-line:first-child {
    transform: rotate(45deg);
}

.close-line:last-child {
    transform: rotate(-45deg);
}

.mobile-menu-close:hover .close-line {
    background: var(--color-black);
}

.mobile-nav-link {
    font-size: var(--font-large);
    font-weight: 700;
    color: var(--color-black);
    text-decoration: none;
    transition: all var(--transition-normal) var(--easing-default);
    padding: var(--space-sm) 0;
    display: block;
    width: 100%;
    text-align: left;
    letter-spacing: -0.5px;
    line-height: 0.9;
    text-transform: uppercase;
    position: relative;
}

.mobile-nav-link:hover {
    color: var(--color-red);
    transform: translateX(10px);
}

.mobile-nav-link:active {
    color: var(--color-red);
    transform: translateX(15px);
}

.mobile-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-red);
    transition: width var(--transition-normal) var(--easing-default);
}

.mobile-nav-link:hover::after {
    width: 100%;
}

/* ===== ANIMATION CASCADE ДЛЯ MOBILE MENU ===== */
/* ВАЖЛИВО: Це створює каскадний ефект появи посилань */

.mobile-menu.active .mobile-nav-link {
    animation: slideInFromLeft 0.5s ease-out forwards;
    opacity: 0;
    transform: translateX(-30px);
}

/* Animation delays для cascade ефекту */
.mobile-menu.active .mobile-nav-link:nth-child(1) {
    animation-delay: 0.1s;
}

.mobile-menu.active .mobile-nav-link:nth-child(2) {
    animation-delay: 0.15s;
}

.mobile-menu.active .mobile-nav-link:nth-child(3) {
    animation-delay: 0.2s;
}

.mobile-menu.active .mobile-nav-link:nth-child(4) {
    animation-delay: 0.25s;
}

.mobile-menu.active .mobile-nav-link:nth-child(5) {
    animation-delay: 0.3s;
}

.mobile-menu.active .mobile-nav-link:nth-child(6) {
    animation-delay: 0.35s;
}

.mobile-menu.active .mobile-nav-link:nth-child(7) {
    animation-delay: 0.4s;
}

/* ===== MOBILE LANGUAGE SWITCHER ===== */
.mobile-language-switcher {
    margin: 16px 0;
}

.lang-dropdown {
    position: relative;
    display: inline-block;
}

.lang-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--color-white);
    border: 1px solid var(--color-red);
    border-radius: var(--radius-sm);
    color: var(--color-black);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-normal) ease;
    width: 100%;
    justify-content: space-between;
}

.lang-dropdown-btn:hover {
    background: var(--color-gray);
}

.lang-dropdown-icon {
    transition: transform var(--transition-normal) ease;
}

.lang-dropdown.active .lang-dropdown-icon {
    transform: rotate(180deg);
}

.lang-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-white);
    border: 1px solid var(--color-red);
    border-radius: var(--radius-sm);
    margin-top: 4px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal) ease;
    z-index: 10;
}

.lang-dropdown.active .lang-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--color-black);
    text-decoration: none;
    transition: background var(--transition-fast) ease;
}

.lang-dropdown-item:hover {
    background: var(--color-gray);
    color: var(--color-red);
}

.lang-flag {
    font-size: 18px;
}

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

/* Desktop - показати desktop navigation */
@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }

    .burger-menu {
        display: none;
    }

    .language-switcher {
        display: flex;
    }

    .mobile-language-switcher {
        display: none;
    }
}

/* Mobile - показати burger menu */
@media (max-width: 767px) {
    .nav-menu {
        display: none;
    }

    .burger-menu {
        display: flex;
    }

    .language-switcher {
        display: none;
    }

    .mobile-language-switcher {
        display: block;
    }

    /* Адаптація mobile menu для маленьких екранів */
    .mobile-nav-link {
        font-size: clamp(28px, 6vw, 50px);
        padding: var(--space-xs) 0;
    }

    .mobile-menu {
        padding: max(env(safe-area-inset-top), 100px) max(env(safe-area-inset-right), 20px) max(env(safe-area-inset-bottom), 20px) max(env(safe-area-inset-left), 20px);
    }
}