/* ============================================================================
   LAYOUT & STRUCTURE STYLES
   ============================================================================ */

/* Header */
.site-header {
    background: linear-gradient(180deg, var(--bg-dark-1) 0%, rgba(26, 31, 53, 0.95) 100%);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.header-wrapper {
    width: 100%;
}

.header-content {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) 0;
    min-height: 70px;
}

/* Brand Section */
.brand-section {
    flex-shrink: 0;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--brand-primary);
    text-decoration: none;
    font-weight: 800;
    font-size: var(--fs-xl);
    transition: all var(--transition-base);
}

.brand-logo:hover {
    transform: translateX(2px);
}

.logo-image {
    height: 40px;
    width: auto;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-tertiary));
    border-radius: var(--radius-lg);
    font-size: var(--fs-lg);
    color: var(--bg-dark-0);
}

.logo-text {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Main Navigation */
.main-navigation {
    display: flex;
    justify-content: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-3);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--fs-base);
    padding: var(--space-2) var(--space-1);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
    transform: translateX(-50%);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--text-primary);
}

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

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

/* Dropdowns */
.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--space-1));
    right: 0;
    background: var(--bg-dark-2);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: var(--z-dropdown);
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.dropdown-menu.active {
    display: flex;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.dropdown-item:hover {
    background: var(--bg-dark-3);
    color: var(--brand-primary);
    border-left-color: var(--brand-primary);
}

.dropdown-item.active {
    background: var(--bg-dark-3);
    color: var(--brand-primary);
    border-left-color: var(--brand-primary);
}

.dropdown-item.logout:hover {
    color: var(--color-error);
    border-left-color: var(--color-error);
}

.dropdown-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 0;
}

/* Language Dropdown */
.language-dropdown {
    position: relative;
}

.lang-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.lang-trigger:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

.lang-code {
    min-width: 20px;
    text-align: center;
    font-size: var(--fs-xs);
}

/* Cart Button */
.cart-button {
    position: relative;
}

.badge-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--color-error);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xs);
    font-weight: 700;
}

/* Auth Buttons */
.auth-buttons {
    display: flex;
    gap: var(--space-2);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: transparent;
    border: none;
    cursor: pointer;
    width: 44px;
    height: 44px;
}

.hamburger {
    position: relative;
    width: 24px;
    height: 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background: var(--brand-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.mobile-menu-toggle.active .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active .hamburger span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation */
.mobile-navigation {
    display: none;
    flex-direction: column;
    background: var(--bg-dark-1);
    border-top: 1px solid var(--border-color);
    overflow: hidden;
}

.mobile-navigation.active {
    display: flex;
}

.mobile-nav-menu {
    list-style: none;
    flex-direction: column;
}

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

.mobile-nav-menu a {
    display: block;
    padding: var(--space-3);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.mobile-nav-menu a:hover {
    background: var(--bg-dark-2);
    color: var(--brand-primary);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 70px);
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
}

/* Footer */
.site-footer {
    background: var(--bg-dark-1);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    margin-top: var(--space-9);
    padding: var(--space-8) 0 var(--space-4);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.footer-column h3 {
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    padding: var(--space-1) 0;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--brand-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--space-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.footer-social {
    display: flex;
    gap: var(--space-2);
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.social-icon:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    transform: translateY(-2px);
}

/* Preloader */
.page-preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-dark-0);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.page-preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-spinner {
    position: relative;
    width: 50px;
    height: 50px;
}

.spinner {
    position: absolute;
    width: 50px;
    height: 50px;
    border: 3px solid rgba(0, 217, 255, 0.1);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 1024px) {
    .header-content {
        grid-template-columns: auto 1fr auto;
    }
    
    .main-navigation {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-content {
        gap: var(--space-2);
        min-height: 60px;
        padding: var(--space-2) 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .brand-logo {
        font-size: var(--fs-base);
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: var(--fs-base);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .brand-section {
        margin-right: auto;
    }
    
    .logo-text {
        display: none;
    }
    
    .auth-buttons {
        display: none;
    }
}