/* ============================================
   HEADER COMPONENT
   ============================================ */

header {
    width: 100%;
    max-width: var(--breakpoint-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
    height: 70px;
    background: var(--color-bg);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 0 30px;
    position: sticky;
    top: 20px;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

header .logo {
    font-weight: bold;
    color: var(--color-text);
    font-size: 1.5em;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

header .logo img {
    height: 110px;
    width: auto;
    display: block;
}

.desktop-nav {
    display: flex;
    gap: 24px;
    align-items: center;
}

.desktop-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
    display: inline-flex;
    align-items: center;
    height: 32px;
    padding: 0 8px;
    position: relative;
}

.desktop-nav .nav-tab {
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--color-text);
    line-height: 1.2;
    transition: color var(--transition-base), background var(--transition-base);
}

.desktop-nav a.is-active {
    color: var(--color-primary);
}

.desktop-nav .nav-tab.is-active {
    background: transparent;
    border-color: transparent;
    color: var(--color-primary);
}

.desktop-nav a.is-active::after {
    content: '';
    position: absolute;
    left: 6px;
    right: 6px;
    bottom: -6px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
}

.desktop-nav .nav-tab:hover {
    background: transparent;
    color: var(--color-accent);
}

.desktop-nav a:hover {
    color: var(--color-accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-right: 20px;
}

/* Language Selector */
.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    font-size: 1.1em;
}

.language-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.language-btn svg {
    transition: transform var(--transition-base);
}

.language-btn.active svg {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base) var(--transition-smooth);
    z-index: 1000;
    overflow: hidden;
}

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

.lang-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text);
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--color-border);
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    background: var(--color-bg-secondary);
}

.lang-option.active {
    background: var(--color-primary);
    color: var(--color-bg);
}

.lang-flag {
    font-size: 1.3em;
}

.lang-name {
    font-size: 0.95em;
    font-weight: 400;
}

.header-actions button {
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
}

.header-actions button:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: scale(1.1);
}

.cart-btn {
    position: relative;
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--color-accent);
    color: white;
    border-radius: var(--radius-full);
    width: 18px;
    height: 18px;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 2001;
    transition: all var(--transition-base) var(--transition-cubic);
    border-radius: var(--radius-md);
}

.menu-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.menu-btn.active {
    background: rgba(0, 0, 0, 0.1);
}

.menu-btn span {
    width: 24px;
    height: 2.5px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.4s var(--transition-cubic);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.menu-btn span:nth-child(1) {
    top: 12px;
    transform: translateX(-50%);
}

.menu-btn span:nth-child(2) {
    top: 50%;
    transform: translate(-50%, -50%);
}

.menu-btn span:nth-child(3) {
    bottom: 12px;
    transform: translateX(-50%);
}

.menu-btn.active span:nth-child(1) {
    top: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    background: var(--color-text);
}

.menu-btn.active span:nth-child(2) {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0);
}

.menu-btn.active span:nth-child(3) {
    bottom: auto;
    top: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    background: var(--color-text);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -50%;
    width: 50% !important;
    max-width: 50% !important;
    height: 100vh;
    background: var(--color-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    z-index: 2000;
    transition: right var(--transition-slow) var(--transition-cubic);
    box-shadow: -10px 0 50px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
}

.mobile-menu::-webkit-scrollbar {
    width: 6px;
}

.mobile-menu::-webkit-scrollbar-track {
    background: transparent;
}

.mobile-menu::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.mobile-menu::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s var(--transition-cubic);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    padding: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}

.mobile-menu-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(180deg, rgba(0, 113, 227, 0.05) 0%, transparent 100%);
    pointer-events: none;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 30px 25px;
    border-bottom: 1px solid var(--color-border);
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.mobile-menu-header .logo {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 2px;
    display: flex;
    align-items: center;
}

.mobile-menu-header .logo img {
    height: 30px;
    width: auto;
    display: block;
}

.close-menu {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base) var(--transition-cubic);
    margin-left: auto;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.close-menu:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: rotate(90deg) scale(1.1);
    border-color: rgba(0, 0, 0, 0.2);
}

.close-menu svg {
    width: 20px;
    height: 20px;
}

.mobile-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: 30px;
    position: relative;
    z-index: 2;
}

.mobile-nav a {
    color: rgba(0, 0, 0, 0.9);
    text-decoration: none;
    font-size: 1.3em;
    font-weight: 500;
    padding: 20px 25px;
    border-radius: 15px;
    transition: all 0.4s var(--transition-cubic);
    position: relative;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    letter-spacing: 0.5px;
    opacity: 0;
    transform: translateX(-30px);
    animation: slideInMenu 0.5s ease forwards;
}

.mobile-menu.active .mobile-nav a {
    animation: slideInMenu 0.5s ease forwards;
}

.mobile-menu.active .mobile-nav a:nth-child(1) {
    animation-delay: 0.1s;
}

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

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

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

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

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

@keyframes slideInMenu {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.mobile-nav a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    transform: scaleY(0);
    transition: transform 0.4s var(--transition-cubic);
    border-radius: 0 4px 4px 0;
}

.mobile-nav a:hover,
.mobile-nav a:active {
    color: var(--color-text);
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.1);
    transform: translateX(10px);
    padding-left: 35px;
}

.mobile-nav a.is-active {
    color: var(--color-text);
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.1);
    transform: translateX(10px);
    padding-left: 35px;
}

.mobile-nav a.is-active::before {
    transform: scaleY(1);
}

.mobile-nav a:hover::before,
.mobile-nav a:active::before {
    transform: scaleY(1);
}

.mobile-menu-footer {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 30px;
    border-top: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 2;
}

.mobile-login-btn,
.mobile-register-btn {
    width: 100%;
    padding: 18px 30px;
    border: none;
    border-radius: 15px;
    font-weight: 600;
    font-size: 1.1em;
    cursor: pointer;
    transition: all 0.4s var(--transition-cubic);
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.mobile-login-btn {
    background: rgba(0, 0, 0, 0.05);
    color: var(--color-text);
    border: 2px solid rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.mobile-login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.1), transparent);
    transition: left 0.5s ease;
}

.mobile-login-btn:hover::before {
    left: 100%;
}

.mobile-login-btn:hover {
    background: rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.mobile-register-btn {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-bg);
    box-shadow: 0 4px 20px rgba(0, 113, 227, 0.3);
}

.mobile-register-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.mobile-register-btn:hover::before {
    opacity: 1;
}

.mobile-register-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 113, 227, 0.5);
}

.mobile-register-btn > * {
    position: relative;
    z-index: 1;
}

/* Responsive Header */
@media screen and (max-width: 768px) {
    header {
        width: 100% !important;
        max-width: 100% !important;
        padding: calc(env(safe-area-inset-top) + 6px) 16px 6px !important;
        margin: 0 !important;
        border-radius: 0 !important;
        top: 0 !important;
        min-height: calc(56px + env(safe-area-inset-top)) !important;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12) !important;
        left: 0 !important;
        transform: none !important;
    }
    
    .header-actions {
        padding-right: 0;
        gap: 6px;
    }

    header .logo {
        font-size: 1.1em;
    }

    header .logo img {
        height: 70px;
    }
    
    .menu-btn {
        width: 44px;
        height: 44px;
        padding: 6px;
        margin-left: 0;
        display: flex;
    }
    
    .header-actions button {
        min-width: 44px;
        min-height: 44px;
        padding: 6px;
    }

    .language-btn {
        padding: 6px;
    }

    .menu-btn span {
        width: 22px;
    }
    
    .menu-btn span:nth-child(1) {
        top: 10px;
    }
    
    .menu-btn span:nth-child(3) {
        bottom: 10px;
    }
    
    .mobile-menu {
        width: 100% !important;
        max-width: 100% !important;
        right: -100%;
    }
    
    .mobile-menu.active {
        right: 0;
    }
    
    .mobile-menu-content {
        padding: 0;
    }
    
    .mobile-menu-header {
        padding: calc(env(safe-area-inset-top) + 12px) 20px 12px;
    }

    .mobile-menu-header .logo img {
        height: 80px;
    }
    
    .mobile-nav {
        padding: 20px;
    }
    
    .mobile-nav a {
        font-size: 1.2em;
        padding: 14px 18px;
        min-height: 44px;
    }
    
    .mobile-menu-footer {
        padding: 20px;
        padding-bottom: calc(20px + env(safe-area-inset-bottom));
    }
    
    .close-menu {
        width: 40px;
        height: 40px;
        padding: 10px;
    }
    
    header {
        position: sticky !important;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
    }
    
    .desktop-nav {
        display: none;
    }
}

/* Tablet adjustments */
@media screen and (max-width: 1024px) and (min-width: 769px) {
    header {
        width: calc(100% - 40px);
        max-width: 1000px;
        padding: 0 25px;
        margin: 15px auto;
    }
    
    .desktop-nav {
        gap: 25px;
    }
    
    .header-actions {
        gap: 12px;
        padding-right: 15px;
    }
}