/* Site Header - Glassmorphism */
        .site-header {
            position: sticky;
            top: 0;
            z-index: var(--z-sticky);
            background: rgba(10, 10, 15, 0.8);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--color-border-subtle);
            padding: var(--space-4) 0;
            transition: all var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 10, 15, 0.95);
            box-shadow: var(--shadow-md);
        }

        .header-container {
            max-width: var(--container-xl);
            margin: 0 auto;
            padding: 0 var(--space-6);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        /* Logo */
        .logo {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            text-decoration: none;
        }

        .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-md);
        }

        .logo-text {
            font-size: var(--text-xl);
            font-weight: var(--font-weight-bold);
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Navigation */
        .nav-main {
            display: flex;
            align-items: center;
            gap: var(--space-1);
        }

        .nav-link {
            padding: var(--space-2) var(--space-4);
            color: var(--color-text-secondary);
            text-decoration: none;
            font-size: var(--text-sm);
            font-weight: var(--font-weight-medium);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--color-text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

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

        .dropdown-trigger {
            display: flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-4);
            color: var(--color-text-secondary);
            font-size: var(--text-sm);
            font-weight: var(--font-weight-medium);
            border-radius: var(--radius-md);
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition-fast);
        }

        .dropdown-trigger:hover {
            color: var(--color-text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .dropdown-trigger i {
            font-size: 0.7rem;
            transition: transform var(--transition-base);
        }

        .nav-dropdown:hover .dropdown-trigger i,
        .nav-dropdown.open .dropdown-trigger i {
            transform: rotate(180deg);
        }

        .dropdown-panel {
            position: absolute;
            top: calc(100% + var(--space-2));
            left: 50%;
            transform: translateX(-50%) translateY(-8px);
            opacity: 0;
            visibility: hidden;
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border-default);
            border-radius: var(--radius-lg);
            padding: var(--space-2);
            min-width: 200px;
            box-shadow: var(--shadow-xl);
            transition: all var(--transition-fast);
            z-index: var(--z-dropdown);
        }

        .nav-dropdown:hover .dropdown-panel,
        .nav-dropdown.open .dropdown-panel {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }

        .dropdown-item {
            display: flex;
            align-items: center;
            gap: var(--space-3);
            padding: var(--space-3) var(--space-4);
            color: var(--color-text-secondary);
            text-decoration: none;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            font-size: var(--text-sm);
        }

        .dropdown-item:hover {
            background: rgba(99, 102, 241, 0.1);
            color: var(--color-accent-primary);
            transform: translateX(4px);
        }

        .dropdown-item i {
            width: 20px;
            text-align: center;
            font-size: var(--text-base);
        }

        /* Header Actions */
        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--space-4);
        }

        /* Language Selector in Header */
        .header-lang-select {
            position: relative;
        }

        .header-lang-select select {
            appearance: none;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-border-subtle);
            border-radius: var(--radius-md);
            padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
            font-size: var(--text-sm);
            color: var(--color-text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right var(--space-2) center;
            background-size: 14px;
        }

        .header-lang-select select:hover {
            background-color: rgba(255, 255, 255, 0.08);
            border-color: var(--color-border-default);
        }

        .header-lang-select select:focus {
            outline: none;
            border-color: var(--color-accent-primary);
        }

        .header-lang-select select option {
            background: var(--color-bg-elevated);
            color: var(--color-text-primary);
        }

        /* CTA Button in Header */
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: var(--space-2);
            padding: var(--space-2) var(--space-4);
            background: var(--gradient-primary);
            color: white;
            text-decoration: none;
            font-size: var(--text-sm);
            font-weight: var(--font-weight-semibold);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
        }

        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(99, 102, 241, 0.4);
        }

        /* Mobile Menu Button */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: var(--space-2);
            cursor: pointer;
            z-index: calc(var(--z-sticky) + 10);
        }

        .hamburger-line {
            width: 24px;
            height: 2px;
            background: var(--color-text-primary);
            transition: all var(--transition-base);
            transform-origin: center;
        }

        .mobile-menu-btn.active .hamburger-line:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-menu-btn.active .hamburger-line:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .mobile-menu-btn.active .hamburger-line:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Mobile Styles */
        @media (max-width: 992px) {
            .nav-main {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--color-bg-primary);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: var(--space-2);
                opacity: 0;
                visibility: hidden;
                transition: all var(--transition-slow);
                z-index: var(--z-overlay);
            }

            .nav-main.active {
                opacity: 1;
                visibility: visible;
            }

            .nav-link {
                font-size: var(--text-xl);
                padding: var(--space-4) var(--space-6);
            }

            .nav-dropdown {
                width: 100%;
                text-align: center;
            }

            .dropdown-trigger {
                font-size: var(--text-xl);
                padding: var(--space-4) var(--space-6);
                justify-content: center;
                width: 100%;
            }

            .dropdown-panel {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                background: transparent;
                border: none;
                box-shadow: none;
                padding: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height var(--transition-slow);
            }

            .nav-dropdown.open .dropdown-panel {
                max-height: 400px;
            }

            .dropdown-item {
                justify-content: center;
                font-size: var(--text-base);
                padding: var(--space-3) var(--space-4);
            }

            .dropdown-item:hover {
                transform: none;
            }

            .mobile-menu-btn {
                display: flex;
            }

            .header-actions {
                display: none;
            }

            /* Show language selector in mobile menu */
            .mobile-lang-select {
                margin-top: var(--space-6);
                padding-top: var(--space-6);
                border-top: 1px solid var(--color-border-subtle);
            }

            .mobile-lang-select select {
                background: var(--color-bg-tertiary);
                border: 1px solid var(--color-border-default);
                padding: var(--space-3) var(--space-10) var(--space-3) var(--space-4);
                font-size: var(--text-base);
                border-radius: var(--radius-lg);
                color: var(--color-text-primary);
            }

            .header-container {
                padding: 0 var(--space-4);
            }
        }

        @media (min-width: 993px) {
            .mobile-lang-select {
                display: none;
            }
        }